author | dholmes |
Thu, 24 Oct 2013 20:47:18 -0400 | |
changeset 21123 | 1370c7b2f97c |
parent 20683 | 7b211e525ab8 |
child 21213 | 6290e790c312 |
permissions | -rw-r--r-- |
10565 | 1 |
/* |
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* Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved. |
10565 | 3 |
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 |
* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
|
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
|
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
|
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
|
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* |
|
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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||
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// no precompiled headers |
|
26 |
#include "classfile/classLoader.hpp" |
|
27 |
#include "classfile/systemDictionary.hpp" |
|
28 |
#include "classfile/vmSymbols.hpp" |
|
29 |
#include "code/icBuffer.hpp" |
|
30 |
#include "code/vtableStubs.hpp" |
|
31 |
#include "compiler/compileBroker.hpp" |
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#include "compiler/disassembler.hpp" |
10565 | 33 |
#include "interpreter/interpreter.hpp" |
34 |
#include "jvm_bsd.h" |
|
35 |
#include "memory/allocation.inline.hpp" |
|
36 |
#include "memory/filemap.hpp" |
|
37 |
#include "mutex_bsd.inline.hpp" |
|
38 |
#include "oops/oop.inline.hpp" |
|
39 |
#include "os_share_bsd.hpp" |
|
40 |
#include "prims/jniFastGetField.hpp" |
|
41 |
#include "prims/jvm.h" |
|
42 |
#include "prims/jvm_misc.hpp" |
|
43 |
#include "runtime/arguments.hpp" |
|
44 |
#include "runtime/extendedPC.hpp" |
|
45 |
#include "runtime/globals.hpp" |
|
46 |
#include "runtime/interfaceSupport.hpp" |
|
47 |
#include "runtime/java.hpp" |
|
48 |
#include "runtime/javaCalls.hpp" |
|
49 |
#include "runtime/mutexLocker.hpp" |
|
50 |
#include "runtime/objectMonitor.hpp" |
|
51 |
#include "runtime/osThread.hpp" |
|
52 |
#include "runtime/perfMemory.hpp" |
|
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#include "runtime/sharedRuntime.hpp" |
|
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#include "runtime/statSampler.hpp" |
|
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#include "runtime/stubRoutines.hpp" |
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#include "runtime/thread.inline.hpp" |
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#include "runtime/threadCritical.hpp" |
58 |
#include "runtime/timer.hpp" |
|
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#include "services/attachListener.hpp" |
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#include "services/memTracker.hpp" |
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#include "services/runtimeService.hpp" |
62 |
#include "utilities/decoder.hpp" |
|
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#include "utilities/defaultStream.hpp" |
|
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#include "utilities/events.hpp" |
|
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#include "utilities/growableArray.hpp" |
|
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#include "utilities/vmError.hpp" |
|
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||
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// put OS-includes here |
|
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# include <sys/types.h> |
|
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# include <sys/mman.h> |
|
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# include <sys/stat.h> |
|
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# include <sys/select.h> |
|
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# include <pthread.h> |
|
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# include <signal.h> |
|
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# include <errno.h> |
|
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# include <dlfcn.h> |
|
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# include <stdio.h> |
|
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# include <unistd.h> |
|
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# include <sys/resource.h> |
|
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# include <pthread.h> |
|
81 |
# include <sys/stat.h> |
|
82 |
# include <sys/time.h> |
|
83 |
# include <sys/times.h> |
|
84 |
# include <sys/utsname.h> |
|
85 |
# include <sys/socket.h> |
|
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# include <sys/wait.h> |
|
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# include <time.h> |
|
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# include <pwd.h> |
|
89 |
# include <poll.h> |
|
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# include <semaphore.h> |
|
91 |
# include <fcntl.h> |
|
92 |
# include <string.h> |
|
93 |
# include <sys/param.h> |
|
94 |
# include <sys/sysctl.h> |
|
95 |
# include <sys/ipc.h> |
|
96 |
# include <sys/shm.h> |
|
97 |
#ifndef __APPLE__ |
|
98 |
# include <link.h> |
|
99 |
#endif |
|
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# include <stdint.h> |
|
101 |
# include <inttypes.h> |
|
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# include <sys/ioctl.h> |
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# include <sys/syscall.h> |
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|
105 |
#if defined(__FreeBSD__) || defined(__NetBSD__) |
|
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# include <elf.h> |
|
107 |
#endif |
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#ifdef __APPLE__ |
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# include <mach/mach.h> // semaphore_* API |
111 |
# include <mach-o/dyld.h> |
|
112 |
# include <sys/proc_info.h> |
|
113 |
# include <objc/objc-auto.h> |
|
10565 | 114 |
#endif |
115 |
||
116 |
#ifndef MAP_ANONYMOUS |
|
117 |
#define MAP_ANONYMOUS MAP_ANON |
|
118 |
#endif |
|
119 |
||
120 |
#define MAX_PATH (2 * K) |
|
121 |
||
122 |
// for timer info max values which include all bits |
|
123 |
#define ALL_64_BITS CONST64(0xFFFFFFFFFFFFFFFF) |
|
124 |
||
125 |
#define LARGEPAGES_BIT (1 << 6) |
|
126 |
//////////////////////////////////////////////////////////////////////////////// |
|
127 |
// global variables |
|
128 |
julong os::Bsd::_physical_memory = 0; |
|
129 |
||
130 |
||
131 |
int (*os::Bsd::_clock_gettime)(clockid_t, struct timespec *) = NULL; |
|
132 |
pthread_t os::Bsd::_main_thread; |
|
133 |
int os::Bsd::_page_size = -1; |
|
134 |
||
135 |
static jlong initial_time_count=0; |
|
136 |
||
137 |
static int clock_tics_per_sec = 100; |
|
138 |
||
139 |
// For diagnostics to print a message once. see run_periodic_checks |
|
140 |
static sigset_t check_signal_done; |
|
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static bool check_signals = true; |
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|
143 |
static pid_t _initial_pid = 0; |
|
144 |
||
145 |
/* Signal number used to suspend/resume a thread */ |
|
146 |
||
147 |
/* do not use any signal number less than SIGSEGV, see 4355769 */ |
|
148 |
static int SR_signum = SIGUSR2; |
|
149 |
sigset_t SR_sigset; |
|
150 |
||
151 |
||
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//////////////////////////////////////////////////////////////////////////////// |
|
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// utility functions |
|
154 |
||
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static int SR_initialize(); |
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static void unpackTime(timespec* absTime, bool isAbsolute, jlong time); |
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|
158 |
julong os::available_memory() { |
|
159 |
return Bsd::available_memory(); |
|
160 |
} |
|
161 |
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// available here means free |
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julong os::Bsd::available_memory() { |
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uint64_t available = physical_memory() >> 2; |
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#ifdef __APPLE__ |
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mach_msg_type_number_t count = HOST_VM_INFO64_COUNT; |
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vm_statistics64_data_t vmstat; |
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kern_return_t kerr = host_statistics64(mach_host_self(), HOST_VM_INFO64, |
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(host_info64_t)&vmstat, &count); |
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assert(kerr == KERN_SUCCESS, |
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"host_statistics64 failed - check mach_host_self() and count"); |
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if (kerr == KERN_SUCCESS) { |
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available = vmstat.free_count * os::vm_page_size(); |
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} |
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#endif |
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return available; |
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} |
178 |
||
179 |
julong os::physical_memory() { |
|
180 |
return Bsd::physical_memory(); |
|
181 |
} |
|
182 |
||
183 |
//////////////////////////////////////////////////////////////////////////////// |
|
184 |
// environment support |
|
185 |
||
186 |
bool os::getenv(const char* name, char* buf, int len) { |
|
187 |
const char* val = ::getenv(name); |
|
188 |
if (val != NULL && strlen(val) < (size_t)len) { |
|
189 |
strcpy(buf, val); |
|
190 |
return true; |
|
191 |
} |
|
192 |
if (len > 0) buf[0] = 0; // return a null string |
|
193 |
return false; |
|
194 |
} |
|
195 |
||
196 |
||
197 |
// Return true if user is running as root. |
|
198 |
||
199 |
bool os::have_special_privileges() { |
|
200 |
static bool init = false; |
|
201 |
static bool privileges = false; |
|
202 |
if (!init) { |
|
203 |
privileges = (getuid() != geteuid()) || (getgid() != getegid()); |
|
204 |
init = true; |
|
205 |
} |
|
206 |
return privileges; |
|
207 |
} |
|
208 |
||
209 |
||
210 |
||
211 |
// Cpu architecture string |
|
212 |
#if defined(ZERO) |
|
213 |
static char cpu_arch[] = ZERO_LIBARCH; |
|
214 |
#elif defined(IA64) |
|
215 |
static char cpu_arch[] = "ia64"; |
|
216 |
#elif defined(IA32) |
|
217 |
static char cpu_arch[] = "i386"; |
|
218 |
#elif defined(AMD64) |
|
219 |
static char cpu_arch[] = "amd64"; |
|
220 |
#elif defined(ARM) |
|
221 |
static char cpu_arch[] = "arm"; |
|
222 |
#elif defined(PPC) |
|
223 |
static char cpu_arch[] = "ppc"; |
|
224 |
#elif defined(SPARC) |
|
225 |
# ifdef _LP64 |
|
226 |
static char cpu_arch[] = "sparcv9"; |
|
227 |
# else |
|
228 |
static char cpu_arch[] = "sparc"; |
|
229 |
# endif |
|
230 |
#else |
|
231 |
#error Add appropriate cpu_arch setting |
|
232 |
#endif |
|
233 |
||
11593 | 234 |
// Compiler variant |
235 |
#ifdef COMPILER2 |
|
236 |
#define COMPILER_VARIANT "server" |
|
237 |
#else |
|
238 |
#define COMPILER_VARIANT "client" |
|
239 |
#endif |
|
10565 | 240 |
|
14286 | 241 |
|
10565 | 242 |
void os::Bsd::initialize_system_info() { |
243 |
int mib[2]; |
|
244 |
size_t len; |
|
245 |
int cpu_val; |
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julong mem_val; |
10565 | 247 |
|
248 |
/* get processors count via hw.ncpus sysctl */ |
|
249 |
mib[0] = CTL_HW; |
|
250 |
mib[1] = HW_NCPU; |
|
251 |
len = sizeof(cpu_val); |
|
252 |
if (sysctl(mib, 2, &cpu_val, &len, NULL, 0) != -1 && cpu_val >= 1) { |
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253 |
assert(len == sizeof(cpu_val), "unexpected data size"); |
10565 | 254 |
set_processor_count(cpu_val); |
255 |
} |
|
256 |
else { |
|
257 |
set_processor_count(1); // fallback |
|
258 |
} |
|
259 |
||
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/* get physical memory via hw.memsize sysctl (hw.memsize is used |
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261 |
* since it returns a 64 bit value) |
10565 | 262 |
*/ |
263 |
mib[0] = CTL_HW; |
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|
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#if defined (HW_MEMSIZE) // Apple |
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mib[1] = HW_MEMSIZE; |
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#elif defined(HW_PHYSMEM) // Most of BSD |
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mib[1] = HW_PHYSMEM; |
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269 |
#elif defined(HW_REALMEM) // Old FreeBSD |
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mib[1] = HW_REALMEM; |
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271 |
#else |
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272 |
#error No ways to get physmem |
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273 |
#endif |
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|
10565 | 275 |
len = sizeof(mem_val); |
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if (sysctl(mib, 2, &mem_val, &len, NULL, 0) != -1) { |
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277 |
assert(len == sizeof(mem_val), "unexpected data size"); |
10565 | 278 |
_physical_memory = mem_val; |
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279 |
} else { |
10565 | 280 |
_physical_memory = 256*1024*1024; // fallback (XXXBSD?) |
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281 |
} |
10565 | 282 |
|
283 |
#ifdef __OpenBSD__ |
|
284 |
{ |
|
285 |
// limit _physical_memory memory view on OpenBSD since |
|
286 |
// datasize rlimit restricts us anyway. |
|
287 |
struct rlimit limits; |
|
288 |
getrlimit(RLIMIT_DATA, &limits); |
|
289 |
_physical_memory = MIN2(_physical_memory, (julong)limits.rlim_cur); |
|
290 |
} |
|
291 |
#endif |
|
292 |
} |
|
293 |
||
10739 | 294 |
#ifdef __APPLE__ |
295 |
static const char *get_home() { |
|
296 |
const char *home_dir = ::getenv("HOME"); |
|
297 |
if ((home_dir == NULL) || (*home_dir == '\0')) { |
|
298 |
struct passwd *passwd_info = getpwuid(geteuid()); |
|
299 |
if (passwd_info != NULL) { |
|
300 |
home_dir = passwd_info->pw_dir; |
|
301 |
} |
|
302 |
} |
|
303 |
||
304 |
return home_dir; |
|
305 |
} |
|
306 |
#endif |
|
307 |
||
10565 | 308 |
void os::init_system_properties_values() { |
309 |
// char arch[12]; |
|
310 |
// sysinfo(SI_ARCHITECTURE, arch, sizeof(arch)); |
|
311 |
||
312 |
// The next steps are taken in the product version: |
|
313 |
// |
|
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// Obtain the JAVA_HOME value from the location of libjvm.so. |
10565 | 315 |
// This library should be located at: |
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|
316 |
// <JAVA_HOME>/jre/lib/<arch>/{client|server}/libjvm.so. |
10565 | 317 |
// |
318 |
// If "/jre/lib/" appears at the right place in the path, then we |
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// assume libjvm.so is installed in a JDK and we use this path. |
10565 | 320 |
// |
321 |
// Otherwise exit with message: "Could not create the Java virtual machine." |
|
322 |
// |
|
323 |
// The following extra steps are taken in the debugging version: |
|
324 |
// |
|
325 |
// If "/jre/lib/" does NOT appear at the right place in the path |
|
326 |
// instead of exit check for $JAVA_HOME environment variable. |
|
327 |
// |
|
328 |
// If it is defined and we are able to locate $JAVA_HOME/jre/lib/<arch>, |
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// then we append a fake suffix "hotspot/libjvm.so" to this path so |
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changeset
|
330 |
// it looks like libjvm.so is installed there |
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changeset
|
331 |
// <JAVA_HOME>/jre/lib/<arch>/hotspot/libjvm.so. |
10565 | 332 |
// |
333 |
// Otherwise exit. |
|
334 |
// |
|
335 |
// Important note: if the location of libjvm.so changes this |
|
336 |
// code needs to be changed accordingly. |
|
337 |
||
338 |
// The next few definitions allow the code to be verbatim: |
|
13195 | 339 |
#define malloc(n) (char*)NEW_C_HEAP_ARRAY(char, (n), mtInternal) |
10565 | 340 |
#define getenv(n) ::getenv(n) |
341 |
||
342 |
/* |
|
343 |
* See ld(1): |
|
344 |
* The linker uses the following search paths to locate required |
|
345 |
* shared libraries: |
|
346 |
* 1: ... |
|
347 |
* ... |
|
348 |
* 7: The default directories, normally /lib and /usr/lib. |
|
349 |
*/ |
|
350 |
#ifndef DEFAULT_LIBPATH |
|
351 |
#define DEFAULT_LIBPATH "/lib:/usr/lib" |
|
352 |
#endif |
|
353 |
||
354 |
#define EXTENSIONS_DIR "/lib/ext" |
|
355 |
#define ENDORSED_DIR "/lib/endorsed" |
|
356 |
#define REG_DIR "/usr/java/packages" |
|
357 |
||
10739 | 358 |
#ifdef __APPLE__ |
359 |
#define SYS_EXTENSIONS_DIR "/Library/Java/Extensions" |
|
360 |
#define SYS_EXTENSIONS_DIRS SYS_EXTENSIONS_DIR ":/Network" SYS_EXTENSIONS_DIR ":/System" SYS_EXTENSIONS_DIR ":/usr/lib/java" |
|
361 |
const char *user_home_dir = get_home(); |
|
362 |
// the null in SYS_EXTENSIONS_DIRS counts for the size of the colon after user_home_dir |
|
363 |
int system_ext_size = strlen(user_home_dir) + sizeof(SYS_EXTENSIONS_DIR) + |
|
364 |
sizeof(SYS_EXTENSIONS_DIRS); |
|
365 |
#endif |
|
366 |
||
10565 | 367 |
{ |
368 |
/* sysclasspath, java_home, dll_dir */ |
|
369 |
{ |
|
370 |
char *home_path; |
|
371 |
char *dll_path; |
|
372 |
char *pslash; |
|
373 |
char buf[MAXPATHLEN]; |
|
374 |
os::jvm_path(buf, sizeof(buf)); |
|
375 |
||
376 |
// Found the full path to libjvm.so. |
|
377 |
// Now cut the path to <java_home>/jre if we can. |
|
378 |
*(strrchr(buf, '/')) = '\0'; /* get rid of /libjvm.so */ |
|
379 |
pslash = strrchr(buf, '/'); |
|
380 |
if (pslash != NULL) |
|
381 |
*pslash = '\0'; /* get rid of /{client|server|hotspot} */ |
|
382 |
dll_path = malloc(strlen(buf) + 1); |
|
383 |
if (dll_path == NULL) |
|
384 |
return; |
|
385 |
strcpy(dll_path, buf); |
|
386 |
Arguments::set_dll_dir(dll_path); |
|
387 |
||
388 |
if (pslash != NULL) { |
|
389 |
pslash = strrchr(buf, '/'); |
|
390 |
if (pslash != NULL) { |
|
10739 | 391 |
*pslash = '\0'; /* get rid of /<arch> (/lib on macosx) */ |
392 |
#ifndef __APPLE__ |
|
10565 | 393 |
pslash = strrchr(buf, '/'); |
394 |
if (pslash != NULL) |
|
395 |
*pslash = '\0'; /* get rid of /lib */ |
|
10739 | 396 |
#endif |
10565 | 397 |
} |
398 |
} |
|
399 |
||
400 |
home_path = malloc(strlen(buf) + 1); |
|
401 |
if (home_path == NULL) |
|
402 |
return; |
|
403 |
strcpy(home_path, buf); |
|
404 |
Arguments::set_java_home(home_path); |
|
405 |
||
406 |
if (!set_boot_path('/', ':')) |
|
407 |
return; |
|
408 |
} |
|
409 |
||
410 |
/* |
|
411 |
* Where to look for native libraries |
|
412 |
* |
|
413 |
* Note: Due to a legacy implementation, most of the library path |
|
414 |
* is set in the launcher. This was to accomodate linking restrictions |
|
415 |
* on legacy Bsd implementations (which are no longer supported). |
|
416 |
* Eventually, all the library path setting will be done here. |
|
417 |
* |
|
418 |
* However, to prevent the proliferation of improperly built native |
|
419 |
* libraries, the new path component /usr/java/packages is added here. |
|
420 |
* Eventually, all the library path setting will be done here. |
|
421 |
*/ |
|
422 |
{ |
|
423 |
char *ld_library_path; |
|
424 |
||
425 |
/* |
|
426 |
* Construct the invariant part of ld_library_path. Note that the |
|
427 |
* space for the colon and the trailing null are provided by the |
|
428 |
* nulls included by the sizeof operator (so actually we allocate |
|
429 |
* a byte more than necessary). |
|
430 |
*/ |
|
10739 | 431 |
#ifdef __APPLE__ |
432 |
ld_library_path = (char *) malloc(system_ext_size); |
|
433 |
sprintf(ld_library_path, "%s" SYS_EXTENSIONS_DIR ":" SYS_EXTENSIONS_DIRS, user_home_dir); |
|
434 |
#else |
|
10565 | 435 |
ld_library_path = (char *) malloc(sizeof(REG_DIR) + sizeof("/lib/") + |
436 |
strlen(cpu_arch) + sizeof(DEFAULT_LIBPATH)); |
|
437 |
sprintf(ld_library_path, REG_DIR "/lib/%s:" DEFAULT_LIBPATH, cpu_arch); |
|
10739 | 438 |
#endif |
10565 | 439 |
|
440 |
/* |
|
441 |
* Get the user setting of LD_LIBRARY_PATH, and prepended it. It |
|
442 |
* should always exist (until the legacy problem cited above is |
|
443 |
* addressed). |
|
444 |
*/ |
|
445 |
#ifdef __APPLE__ |
|
10739 | 446 |
// Prepend the default path with the JAVA_LIBRARY_PATH so that the app launcher code can specify a directory inside an app wrapper |
447 |
char *l = getenv("JAVA_LIBRARY_PATH"); |
|
448 |
if (l != NULL) { |
|
449 |
char *t = ld_library_path; |
|
450 |
/* That's +1 for the colon and +1 for the trailing '\0' */ |
|
451 |
ld_library_path = (char *) malloc(strlen(l) + 1 + strlen(t) + 1); |
|
452 |
sprintf(ld_library_path, "%s:%s", l, t); |
|
453 |
free(t); |
|
454 |
} |
|
455 |
||
10565 | 456 |
char *v = getenv("DYLD_LIBRARY_PATH"); |
457 |
#else |
|
458 |
char *v = getenv("LD_LIBRARY_PATH"); |
|
459 |
#endif |
|
460 |
if (v != NULL) { |
|
461 |
char *t = ld_library_path; |
|
462 |
/* That's +1 for the colon and +1 for the trailing '\0' */ |
|
463 |
ld_library_path = (char *) malloc(strlen(v) + 1 + strlen(t) + 1); |
|
464 |
sprintf(ld_library_path, "%s:%s", v, t); |
|
10739 | 465 |
free(t); |
10565 | 466 |
} |
11880
ed550eabf75c
7145798: System.loadLibrary does not search current working directory
dcubed
parents:
11601
diff
changeset
|
467 |
|
ed550eabf75c
7145798: System.loadLibrary does not search current working directory
dcubed
parents:
11601
diff
changeset
|
468 |
#ifdef __APPLE__ |
ed550eabf75c
7145798: System.loadLibrary does not search current working directory
dcubed
parents:
11601
diff
changeset
|
469 |
// Apple's Java6 has "." at the beginning of java.library.path. |
ed550eabf75c
7145798: System.loadLibrary does not search current working directory
dcubed
parents:
11601
diff
changeset
|
470 |
// OpenJDK on Windows has "." at the end of java.library.path. |
ed550eabf75c
7145798: System.loadLibrary does not search current working directory
dcubed
parents:
11601
diff
changeset
|
471 |
// OpenJDK on Linux and Solaris don't have "." in java.library.path |
ed550eabf75c
7145798: System.loadLibrary does not search current working directory
dcubed
parents:
11601
diff
changeset
|
472 |
// at all. To ease the transition from Apple's Java6 to OpenJDK7, |
ed550eabf75c
7145798: System.loadLibrary does not search current working directory
dcubed
parents:
11601
diff
changeset
|
473 |
// "." is appended to the end of java.library.path. Yes, this |
ed550eabf75c
7145798: System.loadLibrary does not search current working directory
dcubed
parents:
11601
diff
changeset
|
474 |
// could cause a change in behavior, but Apple's Java6 behavior |
ed550eabf75c
7145798: System.loadLibrary does not search current working directory
dcubed
parents:
11601
diff
changeset
|
475 |
// can be achieved by putting "." at the beginning of the |
ed550eabf75c
7145798: System.loadLibrary does not search current working directory
dcubed
parents:
11601
diff
changeset
|
476 |
// JAVA_LIBRARY_PATH environment variable. |
ed550eabf75c
7145798: System.loadLibrary does not search current working directory
dcubed
parents:
11601
diff
changeset
|
477 |
{ |
ed550eabf75c
7145798: System.loadLibrary does not search current working directory
dcubed
parents:
11601
diff
changeset
|
478 |
char *t = ld_library_path; |
ed550eabf75c
7145798: System.loadLibrary does not search current working directory
dcubed
parents:
11601
diff
changeset
|
479 |
// that's +3 for appending ":." and the trailing '\0' |
ed550eabf75c
7145798: System.loadLibrary does not search current working directory
dcubed
parents:
11601
diff
changeset
|
480 |
ld_library_path = (char *) malloc(strlen(t) + 3); |
ed550eabf75c
7145798: System.loadLibrary does not search current working directory
dcubed
parents:
11601
diff
changeset
|
481 |
sprintf(ld_library_path, "%s:%s", t, "."); |
ed550eabf75c
7145798: System.loadLibrary does not search current working directory
dcubed
parents:
11601
diff
changeset
|
482 |
free(t); |
ed550eabf75c
7145798: System.loadLibrary does not search current working directory
dcubed
parents:
11601
diff
changeset
|
483 |
} |
ed550eabf75c
7145798: System.loadLibrary does not search current working directory
dcubed
parents:
11601
diff
changeset
|
484 |
#endif |
ed550eabf75c
7145798: System.loadLibrary does not search current working directory
dcubed
parents:
11601
diff
changeset
|
485 |
|
10565 | 486 |
Arguments::set_library_path(ld_library_path); |
487 |
} |
|
488 |
||
489 |
/* |
|
490 |
* Extensions directories. |
|
491 |
* |
|
492 |
* Note that the space for the colon and the trailing null are provided |
|
493 |
* by the nulls included by the sizeof operator (so actually one byte more |
|
494 |
* than necessary is allocated). |
|
495 |
*/ |
|
496 |
{ |
|
10739 | 497 |
#ifdef __APPLE__ |
498 |
char *buf = malloc(strlen(Arguments::get_java_home()) + |
|
499 |
sizeof(EXTENSIONS_DIR) + system_ext_size); |
|
500 |
sprintf(buf, "%s" SYS_EXTENSIONS_DIR ":%s" EXTENSIONS_DIR ":" |
|
501 |
SYS_EXTENSIONS_DIRS, user_home_dir, Arguments::get_java_home()); |
|
502 |
#else |
|
10565 | 503 |
char *buf = malloc(strlen(Arguments::get_java_home()) + |
504 |
sizeof(EXTENSIONS_DIR) + sizeof(REG_DIR) + sizeof(EXTENSIONS_DIR)); |
|
505 |
sprintf(buf, "%s" EXTENSIONS_DIR ":" REG_DIR EXTENSIONS_DIR, |
|
506 |
Arguments::get_java_home()); |
|
10739 | 507 |
#endif |
508 |
||
10565 | 509 |
Arguments::set_ext_dirs(buf); |
510 |
} |
|
511 |
||
512 |
/* Endorsed standards default directory. */ |
|
513 |
{ |
|
514 |
char * buf; |
|
515 |
buf = malloc(strlen(Arguments::get_java_home()) + sizeof(ENDORSED_DIR)); |
|
516 |
sprintf(buf, "%s" ENDORSED_DIR, Arguments::get_java_home()); |
|
517 |
Arguments::set_endorsed_dirs(buf); |
|
518 |
} |
|
519 |
} |
|
520 |
||
10739 | 521 |
#ifdef __APPLE__ |
522 |
#undef SYS_EXTENSIONS_DIR |
|
523 |
#endif |
|
10565 | 524 |
#undef malloc |
525 |
#undef getenv |
|
526 |
#undef EXTENSIONS_DIR |
|
527 |
#undef ENDORSED_DIR |
|
528 |
||
529 |
// Done |
|
530 |
return; |
|
531 |
} |
|
532 |
||
533 |
//////////////////////////////////////////////////////////////////////////////// |
|
534 |
// breakpoint support |
|
535 |
||
536 |
void os::breakpoint() { |
|
537 |
BREAKPOINT; |
|
538 |
} |
|
539 |
||
540 |
extern "C" void breakpoint() { |
|
541 |
// use debugger to set breakpoint here |
|
542 |
} |
|
543 |
||
544 |
//////////////////////////////////////////////////////////////////////////////// |
|
545 |
// signal support |
|
546 |
||
547 |
debug_only(static bool signal_sets_initialized = false); |
|
548 |
static sigset_t unblocked_sigs, vm_sigs, allowdebug_blocked_sigs; |
|
549 |
||
550 |
bool os::Bsd::is_sig_ignored(int sig) { |
|
551 |
struct sigaction oact; |
|
552 |
sigaction(sig, (struct sigaction*)NULL, &oact); |
|
553 |
void* ohlr = oact.sa_sigaction ? CAST_FROM_FN_PTR(void*, oact.sa_sigaction) |
|
554 |
: CAST_FROM_FN_PTR(void*, oact.sa_handler); |
|
555 |
if (ohlr == CAST_FROM_FN_PTR(void*, SIG_IGN)) |
|
556 |
return true; |
|
557 |
else |
|
558 |
return false; |
|
559 |
} |
|
560 |
||
561 |
void os::Bsd::signal_sets_init() { |
|
562 |
// Should also have an assertion stating we are still single-threaded. |
|
563 |
assert(!signal_sets_initialized, "Already initialized"); |
|
564 |
// Fill in signals that are necessarily unblocked for all threads in |
|
565 |
// the VM. Currently, we unblock the following signals: |
|
566 |
// SHUTDOWN{1,2,3}_SIGNAL: for shutdown hooks support (unless over-ridden |
|
567 |
// by -Xrs (=ReduceSignalUsage)); |
|
568 |
// BREAK_SIGNAL which is unblocked only by the VM thread and blocked by all |
|
569 |
// other threads. The "ReduceSignalUsage" boolean tells us not to alter |
|
570 |
// the dispositions or masks wrt these signals. |
|
571 |
// Programs embedding the VM that want to use the above signals for their |
|
572 |
// own purposes must, at this time, use the "-Xrs" option to prevent |
|
573 |
// interference with shutdown hooks and BREAK_SIGNAL thread dumping. |
|
574 |
// (See bug 4345157, and other related bugs). |
|
575 |
// In reality, though, unblocking these signals is really a nop, since |
|
576 |
// these signals are not blocked by default. |
|
577 |
sigemptyset(&unblocked_sigs); |
|
578 |
sigemptyset(&allowdebug_blocked_sigs); |
|
579 |
sigaddset(&unblocked_sigs, SIGILL); |
|
580 |
sigaddset(&unblocked_sigs, SIGSEGV); |
|
581 |
sigaddset(&unblocked_sigs, SIGBUS); |
|
582 |
sigaddset(&unblocked_sigs, SIGFPE); |
|
583 |
sigaddset(&unblocked_sigs, SR_signum); |
|
584 |
||
585 |
if (!ReduceSignalUsage) { |
|
586 |
if (!os::Bsd::is_sig_ignored(SHUTDOWN1_SIGNAL)) { |
|
587 |
sigaddset(&unblocked_sigs, SHUTDOWN1_SIGNAL); |
|
588 |
sigaddset(&allowdebug_blocked_sigs, SHUTDOWN1_SIGNAL); |
|
589 |
} |
|
590 |
if (!os::Bsd::is_sig_ignored(SHUTDOWN2_SIGNAL)) { |
|
591 |
sigaddset(&unblocked_sigs, SHUTDOWN2_SIGNAL); |
|
592 |
sigaddset(&allowdebug_blocked_sigs, SHUTDOWN2_SIGNAL); |
|
593 |
} |
|
594 |
if (!os::Bsd::is_sig_ignored(SHUTDOWN3_SIGNAL)) { |
|
595 |
sigaddset(&unblocked_sigs, SHUTDOWN3_SIGNAL); |
|
596 |
sigaddset(&allowdebug_blocked_sigs, SHUTDOWN3_SIGNAL); |
|
597 |
} |
|
598 |
} |
|
599 |
// Fill in signals that are blocked by all but the VM thread. |
|
600 |
sigemptyset(&vm_sigs); |
|
601 |
if (!ReduceSignalUsage) |
|
602 |
sigaddset(&vm_sigs, BREAK_SIGNAL); |
|
603 |
debug_only(signal_sets_initialized = true); |
|
604 |
||
605 |
} |
|
606 |
||
607 |
// These are signals that are unblocked while a thread is running Java. |
|
608 |
// (For some reason, they get blocked by default.) |
|
609 |
sigset_t* os::Bsd::unblocked_signals() { |
|
610 |
assert(signal_sets_initialized, "Not initialized"); |
|
611 |
return &unblocked_sigs; |
|
612 |
} |
|
613 |
||
614 |
// These are the signals that are blocked while a (non-VM) thread is |
|
615 |
// running Java. Only the VM thread handles these signals. |
|
616 |
sigset_t* os::Bsd::vm_signals() { |
|
617 |
assert(signal_sets_initialized, "Not initialized"); |
|
618 |
return &vm_sigs; |
|
619 |
} |
|
620 |
||
621 |
// These are signals that are blocked during cond_wait to allow debugger in |
|
622 |
sigset_t* os::Bsd::allowdebug_blocked_signals() { |
|
623 |
assert(signal_sets_initialized, "Not initialized"); |
|
624 |
return &allowdebug_blocked_sigs; |
|
625 |
} |
|
626 |
||
627 |
void os::Bsd::hotspot_sigmask(Thread* thread) { |
|
628 |
||
629 |
//Save caller's signal mask before setting VM signal mask |
|
630 |
sigset_t caller_sigmask; |
|
631 |
pthread_sigmask(SIG_BLOCK, NULL, &caller_sigmask); |
|
632 |
||
633 |
OSThread* osthread = thread->osthread(); |
|
634 |
osthread->set_caller_sigmask(caller_sigmask); |
|
635 |
||
636 |
pthread_sigmask(SIG_UNBLOCK, os::Bsd::unblocked_signals(), NULL); |
|
637 |
||
638 |
if (!ReduceSignalUsage) { |
|
639 |
if (thread->is_VM_thread()) { |
|
640 |
// Only the VM thread handles BREAK_SIGNAL ... |
|
641 |
pthread_sigmask(SIG_UNBLOCK, vm_signals(), NULL); |
|
642 |
} else { |
|
643 |
// ... all other threads block BREAK_SIGNAL |
|
644 |
pthread_sigmask(SIG_BLOCK, vm_signals(), NULL); |
|
645 |
} |
|
646 |
} |
|
647 |
} |
|
648 |
||
649 |
||
650 |
////////////////////////////////////////////////////////////////////////////// |
|
651 |
// create new thread |
|
652 |
||
653 |
// check if it's safe to start a new thread |
|
654 |
static bool _thread_safety_check(Thread* thread) { |
|
14286 | 655 |
return true; |
10565 | 656 |
} |
657 |
||
10739 | 658 |
#ifdef __APPLE__ |
659 |
// library handle for calling objc_registerThreadWithCollector() |
|
660 |
// without static linking to the libobjc library |
|
661 |
#define OBJC_LIB "/usr/lib/libobjc.dylib" |
|
662 |
#define OBJC_GCREGISTER "objc_registerThreadWithCollector" |
|
663 |
typedef void (*objc_registerThreadWithCollector_t)(); |
|
664 |
extern "C" objc_registerThreadWithCollector_t objc_registerThreadWithCollectorFunction; |
|
665 |
objc_registerThreadWithCollector_t objc_registerThreadWithCollectorFunction = NULL; |
|
666 |
#endif |
|
667 |
||
15593
860cf6c70c06
8006423: SA: NullPointerException in sun.jvm.hotspot.debugger.bsd.BsdThread.getContext(BsdThread.java:67)
sla
parents:
15234
diff
changeset
|
668 |
#ifdef __APPLE__ |
19531 | 669 |
static uint64_t locate_unique_thread_id(mach_port_t mach_thread_port) { |
15593
860cf6c70c06
8006423: SA: NullPointerException in sun.jvm.hotspot.debugger.bsd.BsdThread.getContext(BsdThread.java:67)
sla
parents:
15234
diff
changeset
|
670 |
// Additional thread_id used to correlate threads in SA |
860cf6c70c06
8006423: SA: NullPointerException in sun.jvm.hotspot.debugger.bsd.BsdThread.getContext(BsdThread.java:67)
sla
parents:
15234
diff
changeset
|
671 |
thread_identifier_info_data_t m_ident_info; |
860cf6c70c06
8006423: SA: NullPointerException in sun.jvm.hotspot.debugger.bsd.BsdThread.getContext(BsdThread.java:67)
sla
parents:
15234
diff
changeset
|
672 |
mach_msg_type_number_t count = THREAD_IDENTIFIER_INFO_COUNT; |
860cf6c70c06
8006423: SA: NullPointerException in sun.jvm.hotspot.debugger.bsd.BsdThread.getContext(BsdThread.java:67)
sla
parents:
15234
diff
changeset
|
673 |
|
19531 | 674 |
thread_info(mach_thread_port, THREAD_IDENTIFIER_INFO, |
15593
860cf6c70c06
8006423: SA: NullPointerException in sun.jvm.hotspot.debugger.bsd.BsdThread.getContext(BsdThread.java:67)
sla
parents:
15234
diff
changeset
|
675 |
(thread_info_t) &m_ident_info, &count); |
19531 | 676 |
|
15593
860cf6c70c06
8006423: SA: NullPointerException in sun.jvm.hotspot.debugger.bsd.BsdThread.getContext(BsdThread.java:67)
sla
parents:
15234
diff
changeset
|
677 |
return m_ident_info.thread_id; |
860cf6c70c06
8006423: SA: NullPointerException in sun.jvm.hotspot.debugger.bsd.BsdThread.getContext(BsdThread.java:67)
sla
parents:
15234
diff
changeset
|
678 |
} |
860cf6c70c06
8006423: SA: NullPointerException in sun.jvm.hotspot.debugger.bsd.BsdThread.getContext(BsdThread.java:67)
sla
parents:
15234
diff
changeset
|
679 |
#endif |
860cf6c70c06
8006423: SA: NullPointerException in sun.jvm.hotspot.debugger.bsd.BsdThread.getContext(BsdThread.java:67)
sla
parents:
15234
diff
changeset
|
680 |
|
10565 | 681 |
// Thread start routine for all newly created threads |
682 |
static void *java_start(Thread *thread) { |
|
683 |
// Try to randomize the cache line index of hot stack frames. |
|
684 |
// This helps when threads of the same stack traces evict each other's |
|
685 |
// cache lines. The threads can be either from the same JVM instance, or |
|
686 |
// from different JVM instances. The benefit is especially true for |
|
687 |
// processors with hyperthreading technology. |
|
688 |
static int counter = 0; |
|
689 |
int pid = os::current_process_id(); |
|
690 |
alloca(((pid ^ counter++) & 7) * 128); |
|
691 |
||
692 |
ThreadLocalStorage::set_thread(thread); |
|
693 |
||
694 |
OSThread* osthread = thread->osthread(); |
|
695 |
Monitor* sync = osthread->startThread_lock(); |
|
696 |
||
697 |
// non floating stack BsdThreads needs extra check, see above |
|
698 |
if (!_thread_safety_check(thread)) { |
|
699 |
// notify parent thread |
|
700 |
MutexLockerEx ml(sync, Mutex::_no_safepoint_check_flag); |
|
701 |
osthread->set_state(ZOMBIE); |
|
702 |
sync->notify_all(); |
|
703 |
return NULL; |
|
704 |
} |
|
705 |
||
20377
393ee12eccc8
8022616: u4 should not be used as a type for thread_id
dsamersoff
parents:
20373
diff
changeset
|
706 |
osthread->set_thread_id(os::Bsd::gettid()); |
393ee12eccc8
8022616: u4 should not be used as a type for thread_id
dsamersoff
parents:
20373
diff
changeset
|
707 |
|
11881
9642744ae9a5
7132070: Use a mach_port_t as the OSThread thread_id rather than pthread_t on BSD/OSX
sla
parents:
11880
diff
changeset
|
708 |
#ifdef __APPLE__ |
20377
393ee12eccc8
8022616: u4 should not be used as a type for thread_id
dsamersoff
parents:
20373
diff
changeset
|
709 |
uint64_t unique_thread_id = locate_unique_thread_id(osthread->thread_id()); |
19531 | 710 |
guarantee(unique_thread_id != 0, "unique thread id was not found"); |
711 |
osthread->set_unique_thread_id(unique_thread_id); |
|
11881
9642744ae9a5
7132070: Use a mach_port_t as the OSThread thread_id rather than pthread_t on BSD/OSX
sla
parents:
11880
diff
changeset
|
712 |
#endif |
10565 | 713 |
// initialize signal mask for this thread |
714 |
os::Bsd::hotspot_sigmask(thread); |
|
715 |
||
716 |
// initialize floating point control register |
|
717 |
os::Bsd::init_thread_fpu_state(); |
|
718 |
||
10739 | 719 |
#ifdef __APPLE__ |
720 |
// register thread with objc gc |
|
721 |
if (objc_registerThreadWithCollectorFunction != NULL) { |
|
722 |
objc_registerThreadWithCollectorFunction(); |
|
723 |
} |
|
724 |
#endif |
|
725 |
||
10565 | 726 |
// handshaking with parent thread |
727 |
{ |
|
728 |
MutexLockerEx ml(sync, Mutex::_no_safepoint_check_flag); |
|
729 |
||
730 |
// notify parent thread |
|
731 |
osthread->set_state(INITIALIZED); |
|
732 |
sync->notify_all(); |
|
733 |
||
734 |
// wait until os::start_thread() |
|
735 |
while (osthread->get_state() == INITIALIZED) { |
|
736 |
sync->wait(Mutex::_no_safepoint_check_flag); |
|
737 |
} |
|
738 |
} |
|
739 |
||
740 |
// call one more level start routine |
|
741 |
thread->run(); |
|
742 |
||
743 |
return 0; |
|
744 |
} |
|
745 |
||
746 |
bool os::create_thread(Thread* thread, ThreadType thr_type, size_t stack_size) { |
|
747 |
assert(thread->osthread() == NULL, "caller responsible"); |
|
748 |
||
749 |
// Allocate the OSThread object |
|
750 |
OSThread* osthread = new OSThread(NULL, NULL); |
|
751 |
if (osthread == NULL) { |
|
752 |
return false; |
|
753 |
} |
|
754 |
||
755 |
// set the correct thread state |
|
756 |
osthread->set_thread_type(thr_type); |
|
757 |
||
758 |
// Initial state is ALLOCATED but not INITIALIZED |
|
759 |
osthread->set_state(ALLOCATED); |
|
760 |
||
761 |
thread->set_osthread(osthread); |
|
762 |
||
763 |
// init thread attributes |
|
764 |
pthread_attr_t attr; |
|
765 |
pthread_attr_init(&attr); |
|
766 |
pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED); |
|
767 |
||
768 |
// stack size |
|
769 |
if (os::Bsd::supports_variable_stack_size()) { |
|
770 |
// calculate stack size if it's not specified by caller |
|
771 |
if (stack_size == 0) { |
|
772 |
stack_size = os::Bsd::default_stack_size(thr_type); |
|
773 |
||
774 |
switch (thr_type) { |
|
775 |
case os::java_thread: |
|
776 |
// Java threads use ThreadStackSize which default value can be |
|
777 |
// changed with the flag -Xss |
|
778 |
assert (JavaThread::stack_size_at_create() > 0, "this should be set"); |
|
779 |
stack_size = JavaThread::stack_size_at_create(); |
|
780 |
break; |
|
781 |
case os::compiler_thread: |
|
782 |
if (CompilerThreadStackSize > 0) { |
|
783 |
stack_size = (size_t)(CompilerThreadStackSize * K); |
|
784 |
break; |
|
785 |
} // else fall through: |
|
786 |
// use VMThreadStackSize if CompilerThreadStackSize is not defined |
|
787 |
case os::vm_thread: |
|
788 |
case os::pgc_thread: |
|
789 |
case os::cgc_thread: |
|
790 |
case os::watcher_thread: |
|
791 |
if (VMThreadStackSize > 0) stack_size = (size_t)(VMThreadStackSize * K); |
|
792 |
break; |
|
793 |
} |
|
794 |
} |
|
795 |
||
796 |
stack_size = MAX2(stack_size, os::Bsd::min_stack_allowed); |
|
797 |
pthread_attr_setstacksize(&attr, stack_size); |
|
798 |
} else { |
|
799 |
// let pthread_create() pick the default value. |
|
800 |
} |
|
801 |
||
802 |
ThreadState state; |
|
803 |
||
804 |
{ |
|
805 |
pthread_t tid; |
|
806 |
int ret = pthread_create(&tid, &attr, (void* (*)(void*)) java_start, thread); |
|
807 |
||
808 |
pthread_attr_destroy(&attr); |
|
809 |
||
810 |
if (ret != 0) { |
|
811 |
if (PrintMiscellaneous && (Verbose || WizardMode)) { |
|
812 |
perror("pthread_create()"); |
|
813 |
} |
|
814 |
// Need to clean up stuff we've allocated so far |
|
815 |
thread->set_osthread(NULL); |
|
816 |
delete osthread; |
|
817 |
return false; |
|
818 |
} |
|
819 |
||
820 |
// Store pthread info into the OSThread |
|
821 |
osthread->set_pthread_id(tid); |
|
822 |
||
823 |
// Wait until child thread is either initialized or aborted |
|
824 |
{ |
|
825 |
Monitor* sync_with_child = osthread->startThread_lock(); |
|
826 |
MutexLockerEx ml(sync_with_child, Mutex::_no_safepoint_check_flag); |
|
827 |
while ((state = osthread->get_state()) == ALLOCATED) { |
|
828 |
sync_with_child->wait(Mutex::_no_safepoint_check_flag); |
|
829 |
} |
|
830 |
} |
|
831 |
||
832 |
} |
|
833 |
||
834 |
// Aborted due to thread limit being reached |
|
835 |
if (state == ZOMBIE) { |
|
836 |
thread->set_osthread(NULL); |
|
837 |
delete osthread; |
|
838 |
return false; |
|
839 |
} |
|
840 |
||
841 |
// The thread is returned suspended (in state INITIALIZED), |
|
842 |
// and is started higher up in the call chain |
|
843 |
assert(state == INITIALIZED, "race condition"); |
|
844 |
return true; |
|
845 |
} |
|
846 |
||
847 |
///////////////////////////////////////////////////////////////////////////// |
|
848 |
// attach existing thread |
|
849 |
||
850 |
// bootstrap the main thread |
|
851 |
bool os::create_main_thread(JavaThread* thread) { |
|
852 |
assert(os::Bsd::_main_thread == pthread_self(), "should be called inside main thread"); |
|
853 |
return create_attached_thread(thread); |
|
854 |
} |
|
855 |
||
856 |
bool os::create_attached_thread(JavaThread* thread) { |
|
857 |
#ifdef ASSERT |
|
858 |
thread->verify_not_published(); |
|
859 |
#endif |
|
860 |
||
861 |
// Allocate the OSThread object |
|
862 |
OSThread* osthread = new OSThread(NULL, NULL); |
|
863 |
||
864 |
if (osthread == NULL) { |
|
865 |
return false; |
|
866 |
} |
|
867 |
||
20377
393ee12eccc8
8022616: u4 should not be used as a type for thread_id
dsamersoff
parents:
20373
diff
changeset
|
868 |
osthread->set_thread_id(os::Bsd::gettid()); |
393ee12eccc8
8022616: u4 should not be used as a type for thread_id
dsamersoff
parents:
20373
diff
changeset
|
869 |
|
10565 | 870 |
// Store pthread info into the OSThread |
11881
9642744ae9a5
7132070: Use a mach_port_t as the OSThread thread_id rather than pthread_t on BSD/OSX
sla
parents:
11880
diff
changeset
|
871 |
#ifdef __APPLE__ |
20377
393ee12eccc8
8022616: u4 should not be used as a type for thread_id
dsamersoff
parents:
20373
diff
changeset
|
872 |
uint64_t unique_thread_id = locate_unique_thread_id(osthread->thread_id()); |
19531 | 873 |
guarantee(unique_thread_id != 0, "just checking"); |
874 |
osthread->set_unique_thread_id(unique_thread_id); |
|
11881
9642744ae9a5
7132070: Use a mach_port_t as the OSThread thread_id rather than pthread_t on BSD/OSX
sla
parents:
11880
diff
changeset
|
875 |
#endif |
10565 | 876 |
osthread->set_pthread_id(::pthread_self()); |
877 |
||
878 |
// initialize floating point control register |
|
879 |
os::Bsd::init_thread_fpu_state(); |
|
880 |
||
881 |
// Initial thread state is RUNNABLE |
|
882 |
osthread->set_state(RUNNABLE); |
|
883 |
||
884 |
thread->set_osthread(osthread); |
|
885 |
||
886 |
// initialize signal mask for this thread |
|
887 |
// and save the caller's signal mask |
|
888 |
os::Bsd::hotspot_sigmask(thread); |
|
889 |
||
890 |
return true; |
|
891 |
} |
|
892 |
||
893 |
void os::pd_start_thread(Thread* thread) { |
|
894 |
OSThread * osthread = thread->osthread(); |
|
895 |
assert(osthread->get_state() != INITIALIZED, "just checking"); |
|
896 |
Monitor* sync_with_child = osthread->startThread_lock(); |
|
897 |
MutexLockerEx ml(sync_with_child, Mutex::_no_safepoint_check_flag); |
|
898 |
sync_with_child->notify(); |
|
899 |
} |
|
900 |
||
901 |
// Free Bsd resources related to the OSThread |
|
902 |
void os::free_thread(OSThread* osthread) { |
|
903 |
assert(osthread != NULL, "osthread not set"); |
|
904 |
||
905 |
if (Thread::current()->osthread() == osthread) { |
|
906 |
// Restore caller's signal mask |
|
907 |
sigset_t sigmask = osthread->caller_sigmask(); |
|
908 |
pthread_sigmask(SIG_SETMASK, &sigmask, NULL); |
|
909 |
} |
|
910 |
||
911 |
delete osthread; |
|
912 |
} |
|
913 |
||
914 |
////////////////////////////////////////////////////////////////////////////// |
|
915 |
// thread local storage |
|
916 |
||
917 |
int os::allocate_thread_local_storage() { |
|
918 |
pthread_key_t key; |
|
919 |
int rslt = pthread_key_create(&key, NULL); |
|
920 |
assert(rslt == 0, "cannot allocate thread local storage"); |
|
921 |
return (int)key; |
|
922 |
} |
|
923 |
||
924 |
// Note: This is currently not used by VM, as we don't destroy TLS key |
|
925 |
// on VM exit. |
|
926 |
void os::free_thread_local_storage(int index) { |
|
927 |
int rslt = pthread_key_delete((pthread_key_t)index); |
|
928 |
assert(rslt == 0, "invalid index"); |
|
929 |
} |
|
930 |
||
931 |
void os::thread_local_storage_at_put(int index, void* value) { |
|
932 |
int rslt = pthread_setspecific((pthread_key_t)index, value); |
|
933 |
assert(rslt == 0, "pthread_setspecific failed"); |
|
934 |
} |
|
935 |
||
936 |
extern "C" Thread* get_thread() { |
|
937 |
return ThreadLocalStorage::thread(); |
|
938 |
} |
|
939 |
||
940 |
||
941 |
//////////////////////////////////////////////////////////////////////////////// |
|
942 |
// time support |
|
943 |
||
944 |
// Time since start-up in seconds to a fine granularity. |
|
945 |
// Used by VMSelfDestructTimer and the MemProfiler. |
|
946 |
double os::elapsedTime() { |
|
947 |
||
948 |
return (double)(os::elapsed_counter()) * 0.000001; |
|
949 |
} |
|
950 |
||
951 |
jlong os::elapsed_counter() { |
|
952 |
timeval time; |
|
953 |
int status = gettimeofday(&time, NULL); |
|
954 |
return jlong(time.tv_sec) * 1000 * 1000 + jlong(time.tv_usec) - initial_time_count; |
|
955 |
} |
|
956 |
||
957 |
jlong os::elapsed_frequency() { |
|
958 |
return (1000 * 1000); |
|
959 |
} |
|
960 |
||
17854
d65bc1546091
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
17134
diff
changeset
|
961 |
bool os::supports_vtime() { return true; } |
10565 | 962 |
bool os::enable_vtime() { return false; } |
963 |
bool os::vtime_enabled() { return false; } |
|
17854
d65bc1546091
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
17134
diff
changeset
|
964 |
|
10565 | 965 |
double os::elapsedVTime() { |
966 |
// better than nothing, but not much |
|
967 |
return elapsedTime(); |
|
968 |
} |
|
969 |
||
970 |
jlong os::javaTimeMillis() { |
|
971 |
timeval time; |
|
972 |
int status = gettimeofday(&time, NULL); |
|
973 |
assert(status != -1, "bsd error"); |
|
974 |
return jlong(time.tv_sec) * 1000 + jlong(time.tv_usec / 1000); |
|
975 |
} |
|
976 |
||
977 |
#ifndef CLOCK_MONOTONIC |
|
978 |
#define CLOCK_MONOTONIC (1) |
|
979 |
#endif |
|
980 |
||
981 |
#ifdef __APPLE__ |
|
982 |
void os::Bsd::clock_init() { |
|
983 |
// XXXDARWIN: Investigate replacement monotonic clock |
|
984 |
} |
|
14286 | 985 |
#else |
10565 | 986 |
void os::Bsd::clock_init() { |
987 |
struct timespec res; |
|
988 |
struct timespec tp; |
|
989 |
if (::clock_getres(CLOCK_MONOTONIC, &res) == 0 && |
|
990 |
::clock_gettime(CLOCK_MONOTONIC, &tp) == 0) { |
|
991 |
// yes, monotonic clock is supported |
|
992 |
_clock_gettime = ::clock_gettime; |
|
993 |
} |
|
994 |
} |
|
995 |
#endif |
|
996 |
||
997 |
||
998 |
jlong os::javaTimeNanos() { |
|
999 |
if (Bsd::supports_monotonic_clock()) { |
|
1000 |
struct timespec tp; |
|
1001 |
int status = Bsd::clock_gettime(CLOCK_MONOTONIC, &tp); |
|
1002 |
assert(status == 0, "gettime error"); |
|
1003 |
jlong result = jlong(tp.tv_sec) * (1000 * 1000 * 1000) + jlong(tp.tv_nsec); |
|
1004 |
return result; |
|
1005 |
} else { |
|
1006 |
timeval time; |
|
1007 |
int status = gettimeofday(&time, NULL); |
|
1008 |
assert(status != -1, "bsd error"); |
|
1009 |
jlong usecs = jlong(time.tv_sec) * (1000 * 1000) + jlong(time.tv_usec); |
|
1010 |
return 1000 * usecs; |
|
1011 |
} |
|
1012 |
} |
|
1013 |
||
1014 |
void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) { |
|
1015 |
if (Bsd::supports_monotonic_clock()) { |
|
1016 |
info_ptr->max_value = ALL_64_BITS; |
|
1017 |
||
1018 |
// CLOCK_MONOTONIC - amount of time since some arbitrary point in the past |
|
1019 |
info_ptr->may_skip_backward = false; // not subject to resetting or drifting |
|
1020 |
info_ptr->may_skip_forward = false; // not subject to resetting or drifting |
|
1021 |
} else { |
|
1022 |
// gettimeofday - based on time in seconds since the Epoch thus does not wrap |
|
1023 |
info_ptr->max_value = ALL_64_BITS; |
|
1024 |
||
1025 |
// gettimeofday is a real time clock so it skips |
|
1026 |
info_ptr->may_skip_backward = true; |
|
1027 |
info_ptr->may_skip_forward = true; |
|
1028 |
} |
|
1029 |
||
1030 |
info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time |
|
1031 |
} |
|
1032 |
||
1033 |
// Return the real, user, and system times in seconds from an |
|
1034 |
// arbitrary fixed point in the past. |
|
1035 |
bool os::getTimesSecs(double* process_real_time, |
|
1036 |
double* process_user_time, |
|
1037 |
double* process_system_time) { |
|
1038 |
struct tms ticks; |
|
1039 |
clock_t real_ticks = times(&ticks); |
|
1040 |
||
1041 |
if (real_ticks == (clock_t) (-1)) { |
|
1042 |
return false; |
|
1043 |
} else { |
|
1044 |
double ticks_per_second = (double) clock_tics_per_sec; |
|
1045 |
*process_user_time = ((double) ticks.tms_utime) / ticks_per_second; |
|
1046 |
*process_system_time = ((double) ticks.tms_stime) / ticks_per_second; |
|
1047 |
*process_real_time = ((double) real_ticks) / ticks_per_second; |
|
1048 |
||
1049 |
return true; |
|
1050 |
} |
|
1051 |
} |
|
1052 |
||
1053 |
||
1054 |
char * os::local_time_string(char *buf, size_t buflen) { |
|
1055 |
struct tm t; |
|
1056 |
time_t long_time; |
|
1057 |
time(&long_time); |
|
1058 |
localtime_r(&long_time, &t); |
|
1059 |
jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d", |
|
1060 |
t.tm_year + 1900, t.tm_mon + 1, t.tm_mday, |
|
1061 |
t.tm_hour, t.tm_min, t.tm_sec); |
|
1062 |
return buf; |
|
1063 |
} |
|
1064 |
||
1065 |
struct tm* os::localtime_pd(const time_t* clock, struct tm* res) { |
|
1066 |
return localtime_r(clock, res); |
|
1067 |
} |
|
1068 |
||
1069 |
//////////////////////////////////////////////////////////////////////////////// |
|
1070 |
// runtime exit support |
|
1071 |
||
1072 |
// Note: os::shutdown() might be called very early during initialization, or |
|
1073 |
// called from signal handler. Before adding something to os::shutdown(), make |
|
1074 |
// sure it is async-safe and can handle partially initialized VM. |
|
1075 |
void os::shutdown() { |
|
1076 |
||
1077 |
// allow PerfMemory to attempt cleanup of any persistent resources |
|
1078 |
perfMemory_exit(); |
|
1079 |
||
1080 |
// needs to remove object in file system |
|
1081 |
AttachListener::abort(); |
|
1082 |
||
1083 |
// flush buffered output, finish log files |
|
1084 |
ostream_abort(); |
|
1085 |
||
1086 |
// Check for abort hook |
|
1087 |
abort_hook_t abort_hook = Arguments::abort_hook(); |
|
1088 |
if (abort_hook != NULL) { |
|
1089 |
abort_hook(); |
|
1090 |
} |
|
1091 |
||
1092 |
} |
|
1093 |
||
1094 |
// Note: os::abort() might be called very early during initialization, or |
|
1095 |
// called from signal handler. Before adding something to os::abort(), make |
|
1096 |
// sure it is async-safe and can handle partially initialized VM. |
|
1097 |
void os::abort(bool dump_core) { |
|
1098 |
os::shutdown(); |
|
1099 |
if (dump_core) { |
|
1100 |
#ifndef PRODUCT |
|
1101 |
fdStream out(defaultStream::output_fd()); |
|
1102 |
out.print_raw("Current thread is "); |
|
1103 |
char buf[16]; |
|
1104 |
jio_snprintf(buf, sizeof(buf), UINTX_FORMAT, os::current_thread_id()); |
|
1105 |
out.print_raw_cr(buf); |
|
1106 |
out.print_raw_cr("Dumping core ..."); |
|
1107 |
#endif |
|
1108 |
::abort(); // dump core |
|
1109 |
} |
|
1110 |
||
1111 |
::exit(1); |
|
1112 |
} |
|
1113 |
||
1114 |
// Die immediately, no exit hook, no abort hook, no cleanup. |
|
1115 |
void os::die() { |
|
1116 |
// _exit() on BsdThreads only kills current thread |
|
1117 |
::abort(); |
|
1118 |
} |
|
1119 |
||
1120 |
// unused on bsd for now. |
|
1121 |
void os::set_error_file(const char *logfile) {} |
|
1122 |
||
1123 |
||
1124 |
// This method is a copy of JDK's sysGetLastErrorString |
|
1125 |
// from src/solaris/hpi/src/system_md.c |
|
1126 |
||
1127 |
size_t os::lasterror(char *buf, size_t len) { |
|
1128 |
||
1129 |
if (errno == 0) return 0; |
|
1130 |
||
1131 |
const char *s = ::strerror(errno); |
|
1132 |
size_t n = ::strlen(s); |
|
1133 |
if (n >= len) { |
|
1134 |
n = len - 1; |
|
1135 |
} |
|
1136 |
::strncpy(buf, s, n); |
|
1137 |
buf[n] = '\0'; |
|
1138 |
return n; |
|
1139 |
} |
|
1140 |
||
20377
393ee12eccc8
8022616: u4 should not be used as a type for thread_id
dsamersoff
parents:
20373
diff
changeset
|
1141 |
// Information of current thread in variety of formats |
393ee12eccc8
8022616: u4 should not be used as a type for thread_id
dsamersoff
parents:
20373
diff
changeset
|
1142 |
pid_t os::Bsd::gettid() { |
393ee12eccc8
8022616: u4 should not be used as a type for thread_id
dsamersoff
parents:
20373
diff
changeset
|
1143 |
int retval = -1; |
393ee12eccc8
8022616: u4 should not be used as a type for thread_id
dsamersoff
parents:
20373
diff
changeset
|
1144 |
|
393ee12eccc8
8022616: u4 should not be used as a type for thread_id
dsamersoff
parents:
20373
diff
changeset
|
1145 |
#ifdef __APPLE__ //XNU kernel |
393ee12eccc8
8022616: u4 should not be used as a type for thread_id
dsamersoff
parents:
20373
diff
changeset
|
1146 |
// despite the fact mach port is actually not a thread id use it |
393ee12eccc8
8022616: u4 should not be used as a type for thread_id
dsamersoff
parents:
20373
diff
changeset
|
1147 |
// instead of syscall(SYS_thread_selfid) as it certainly fits to u4 |
393ee12eccc8
8022616: u4 should not be used as a type for thread_id
dsamersoff
parents:
20373
diff
changeset
|
1148 |
retval = ::pthread_mach_thread_np(::pthread_self()); |
393ee12eccc8
8022616: u4 should not be used as a type for thread_id
dsamersoff
parents:
20373
diff
changeset
|
1149 |
guarantee(retval != 0, "just checking"); |
393ee12eccc8
8022616: u4 should not be used as a type for thread_id
dsamersoff
parents:
20373
diff
changeset
|
1150 |
return retval; |
393ee12eccc8
8022616: u4 should not be used as a type for thread_id
dsamersoff
parents:
20373
diff
changeset
|
1151 |
|
393ee12eccc8
8022616: u4 should not be used as a type for thread_id
dsamersoff
parents:
20373
diff
changeset
|
1152 |
#elif __FreeBSD__ |
393ee12eccc8
8022616: u4 should not be used as a type for thread_id
dsamersoff
parents:
20373
diff
changeset
|
1153 |
retval = syscall(SYS_thr_self); |
393ee12eccc8
8022616: u4 should not be used as a type for thread_id
dsamersoff
parents:
20373
diff
changeset
|
1154 |
#elif __OpenBSD__ |
393ee12eccc8
8022616: u4 should not be used as a type for thread_id
dsamersoff
parents:
20373
diff
changeset
|
1155 |
retval = syscall(SYS_getthrid); |
393ee12eccc8
8022616: u4 should not be used as a type for thread_id
dsamersoff
parents:
20373
diff
changeset
|
1156 |
#elif __NetBSD__ |
393ee12eccc8
8022616: u4 should not be used as a type for thread_id
dsamersoff
parents:
20373
diff
changeset
|
1157 |
retval = (pid_t) syscall(SYS__lwp_self); |
393ee12eccc8
8022616: u4 should not be used as a type for thread_id
dsamersoff
parents:
20373
diff
changeset
|
1158 |
#endif |
393ee12eccc8
8022616: u4 should not be used as a type for thread_id
dsamersoff
parents:
20373
diff
changeset
|
1159 |
|
393ee12eccc8
8022616: u4 should not be used as a type for thread_id
dsamersoff
parents:
20373
diff
changeset
|
1160 |
if (retval == -1) { |
393ee12eccc8
8022616: u4 should not be used as a type for thread_id
dsamersoff
parents:
20373
diff
changeset
|
1161 |
return getpid(); |
393ee12eccc8
8022616: u4 should not be used as a type for thread_id
dsamersoff
parents:
20373
diff
changeset
|
1162 |
} |
393ee12eccc8
8022616: u4 should not be used as a type for thread_id
dsamersoff
parents:
20373
diff
changeset
|
1163 |
} |
393ee12eccc8
8022616: u4 should not be used as a type for thread_id
dsamersoff
parents:
20373
diff
changeset
|
1164 |
|
11881
9642744ae9a5
7132070: Use a mach_port_t as the OSThread thread_id rather than pthread_t on BSD/OSX
sla
parents:
11880
diff
changeset
|
1165 |
intx os::current_thread_id() { |
9642744ae9a5
7132070: Use a mach_port_t as the OSThread thread_id rather than pthread_t on BSD/OSX
sla
parents:
11880
diff
changeset
|
1166 |
#ifdef __APPLE__ |
19531 | 1167 |
return (intx)::pthread_mach_thread_np(::pthread_self()); |
11881
9642744ae9a5
7132070: Use a mach_port_t as the OSThread thread_id rather than pthread_t on BSD/OSX
sla
parents:
11880
diff
changeset
|
1168 |
#else |
9642744ae9a5
7132070: Use a mach_port_t as the OSThread thread_id rather than pthread_t on BSD/OSX
sla
parents:
11880
diff
changeset
|
1169 |
return (intx)::pthread_self(); |
9642744ae9a5
7132070: Use a mach_port_t as the OSThread thread_id rather than pthread_t on BSD/OSX
sla
parents:
11880
diff
changeset
|
1170 |
#endif |
9642744ae9a5
7132070: Use a mach_port_t as the OSThread thread_id rather than pthread_t on BSD/OSX
sla
parents:
11880
diff
changeset
|
1171 |
} |
20377
393ee12eccc8
8022616: u4 should not be used as a type for thread_id
dsamersoff
parents:
20373
diff
changeset
|
1172 |
|
10565 | 1173 |
int os::current_process_id() { |
1174 |
||
1175 |
// Under the old bsd thread library, bsd gives each thread |
|
1176 |
// its own process id. Because of this each thread will return |
|
1177 |
// a different pid if this method were to return the result |
|
1178 |
// of getpid(2). Bsd provides no api that returns the pid |
|
1179 |
// of the launcher thread for the vm. This implementation |
|
1180 |
// returns a unique pid, the pid of the launcher thread |
|
1181 |
// that starts the vm 'process'. |
|
1182 |
||
1183 |
// Under the NPTL, getpid() returns the same pid as the |
|
1184 |
// launcher thread rather than a unique pid per thread. |
|
1185 |
// Use gettid() if you want the old pre NPTL behaviour. |
|
1186 |
||
1187 |
// if you are looking for the result of a call to getpid() that |
|
1188 |
// returns a unique pid for the calling thread, then look at the |
|
1189 |
// OSThread::thread_id() method in osThread_bsd.hpp file |
|
1190 |
||
1191 |
return (int)(_initial_pid ? _initial_pid : getpid()); |
|
1192 |
} |
|
1193 |
||
1194 |
// DLL functions |
|
1195 |
||
1196 |
#define JNI_LIB_PREFIX "lib" |
|
1197 |
#ifdef __APPLE__ |
|
1198 |
#define JNI_LIB_SUFFIX ".dylib" |
|
1199 |
#else |
|
1200 |
#define JNI_LIB_SUFFIX ".so" |
|
1201 |
#endif |
|
1202 |
||
1203 |
const char* os::dll_file_extension() { return JNI_LIB_SUFFIX; } |
|
1204 |
||
1205 |
// This must be hard coded because it's the system's temporary |
|
1206 |
// directory not the java application's temp directory, ala java.io.tmpdir. |
|
10739 | 1207 |
#ifdef __APPLE__ |
1208 |
// macosx has a secure per-user temporary directory |
|
1209 |
char temp_path_storage[PATH_MAX]; |
|
1210 |
const char* os::get_temp_directory() { |
|
1211 |
static char *temp_path = NULL; |
|
1212 |
if (temp_path == NULL) { |
|
1213 |
int pathSize = confstr(_CS_DARWIN_USER_TEMP_DIR, temp_path_storage, PATH_MAX); |
|
1214 |
if (pathSize == 0 || pathSize > PATH_MAX) { |
|
1215 |
strlcpy(temp_path_storage, "/tmp/", sizeof(temp_path_storage)); |
|
1216 |
} |
|
1217 |
temp_path = temp_path_storage; |
|
1218 |
} |
|
1219 |
return temp_path; |
|
1220 |
} |
|
1221 |
#else /* __APPLE__ */ |
|
10565 | 1222 |
const char* os::get_temp_directory() { return "/tmp"; } |
10739 | 1223 |
#endif /* __APPLE__ */ |
10565 | 1224 |
|
1225 |
static bool file_exists(const char* filename) { |
|
1226 |
struct stat statbuf; |
|
1227 |
if (filename == NULL || strlen(filename) == 0) { |
|
1228 |
return false; |
|
1229 |
} |
|
1230 |
return os::stat(filename, &statbuf) == 0; |
|
1231 |
} |
|
1232 |
||
14471
f3a6b82e25cf
8001185: parsing of sun.boot.library.path in os::dll_build_name somewhat broken
bpittore
parents:
14286
diff
changeset
|
1233 |
bool os::dll_build_name(char* buffer, size_t buflen, |
10565 | 1234 |
const char* pname, const char* fname) { |
14471
f3a6b82e25cf
8001185: parsing of sun.boot.library.path in os::dll_build_name somewhat broken
bpittore
parents:
14286
diff
changeset
|
1235 |
bool retval = false; |
10565 | 1236 |
// Copied from libhpi |
1237 |
const size_t pnamelen = pname ? strlen(pname) : 0; |
|
1238 |
||
14471
f3a6b82e25cf
8001185: parsing of sun.boot.library.path in os::dll_build_name somewhat broken
bpittore
parents:
14286
diff
changeset
|
1239 |
// Return error on buffer overflow. |
10565 | 1240 |
if (pnamelen + strlen(fname) + strlen(JNI_LIB_PREFIX) + strlen(JNI_LIB_SUFFIX) + 2 > buflen) { |
14471
f3a6b82e25cf
8001185: parsing of sun.boot.library.path in os::dll_build_name somewhat broken
bpittore
parents:
14286
diff
changeset
|
1241 |
return retval; |
10565 | 1242 |
} |
1243 |
||
1244 |
if (pnamelen == 0) { |
|
1245 |
snprintf(buffer, buflen, JNI_LIB_PREFIX "%s" JNI_LIB_SUFFIX, fname); |
|
14471
f3a6b82e25cf
8001185: parsing of sun.boot.library.path in os::dll_build_name somewhat broken
bpittore
parents:
14286
diff
changeset
|
1246 |
retval = true; |
10565 | 1247 |
} else if (strchr(pname, *os::path_separator()) != NULL) { |
1248 |
int n; |
|
1249 |
char** pelements = split_path(pname, &n); |
|
16669
fb3397cee116
8006103: [parfait] Possible null pointer dereference at hotspot/src/os/linux/vm/os_linux.cpp; os_windows.cpp; os_solaris.cpp; os_bsd.cpp
ccheung
parents:
15929
diff
changeset
|
1250 |
if (pelements == NULL) { |
16672 | 1251 |
return false; |
16669
fb3397cee116
8006103: [parfait] Possible null pointer dereference at hotspot/src/os/linux/vm/os_linux.cpp; os_windows.cpp; os_solaris.cpp; os_bsd.cpp
ccheung
parents:
15929
diff
changeset
|
1252 |
} |
10565 | 1253 |
for (int i = 0 ; i < n ; i++) { |
1254 |
// Really shouldn't be NULL, but check can't hurt |
|
1255 |
if (pelements[i] == NULL || strlen(pelements[i]) == 0) { |
|
1256 |
continue; // skip the empty path values |
|
1257 |
} |
|
1258 |
snprintf(buffer, buflen, "%s/" JNI_LIB_PREFIX "%s" JNI_LIB_SUFFIX, |
|
1259 |
pelements[i], fname); |
|
1260 |
if (file_exists(buffer)) { |
|
14471
f3a6b82e25cf
8001185: parsing of sun.boot.library.path in os::dll_build_name somewhat broken
bpittore
parents:
14286
diff
changeset
|
1261 |
retval = true; |
10565 | 1262 |
break; |
1263 |
} |
|
1264 |
} |
|
1265 |
// release the storage |
|
1266 |
for (int i = 0 ; i < n ; i++) { |
|
1267 |
if (pelements[i] != NULL) { |
|
13195 | 1268 |
FREE_C_HEAP_ARRAY(char, pelements[i], mtInternal); |
10565 | 1269 |
} |
1270 |
} |
|
1271 |
if (pelements != NULL) { |
|
13195 | 1272 |
FREE_C_HEAP_ARRAY(char*, pelements, mtInternal); |
10565 | 1273 |
} |
1274 |
} else { |
|
1275 |
snprintf(buffer, buflen, "%s/" JNI_LIB_PREFIX "%s" JNI_LIB_SUFFIX, pname, fname); |
|
14471
f3a6b82e25cf
8001185: parsing of sun.boot.library.path in os::dll_build_name somewhat broken
bpittore
parents:
14286
diff
changeset
|
1276 |
retval = true; |
10565 | 1277 |
} |
14471
f3a6b82e25cf
8001185: parsing of sun.boot.library.path in os::dll_build_name somewhat broken
bpittore
parents:
14286
diff
changeset
|
1278 |
return retval; |
10565 | 1279 |
} |
1280 |
||
15096
3db45569f8c0
8005044: remove crufty '_g' support from HS runtime code
dcubed
parents:
14633
diff
changeset
|
1281 |
// check if addr is inside libjvm.so |
10565 | 1282 |
bool os::address_is_in_vm(address addr) { |
1283 |
static address libjvm_base_addr; |
|
1284 |
Dl_info dlinfo; |
|
1285 |
||
1286 |
if (libjvm_base_addr == NULL) { |
|
18683
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1287 |
if (dladdr(CAST_FROM_FN_PTR(void *, os::address_is_in_vm), &dlinfo) != 0) { |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1288 |
libjvm_base_addr = (address)dlinfo.dli_fbase; |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1289 |
} |
10565 | 1290 |
assert(libjvm_base_addr !=NULL, "Cannot obtain base address for libjvm"); |
1291 |
} |
|
1292 |
||
18683
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1293 |
if (dladdr((void *)addr, &dlinfo) != 0) { |
10565 | 1294 |
if (libjvm_base_addr == (address)dlinfo.dli_fbase) return true; |
1295 |
} |
|
1296 |
||
1297 |
return false; |
|
1298 |
} |
|
1299 |
||
13340 | 1300 |
|
1301 |
#define MACH_MAXSYMLEN 256 |
|
1302 |
||
10565 | 1303 |
bool os::dll_address_to_function_name(address addr, char *buf, |
1304 |
int buflen, int *offset) { |
|
18683
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1305 |
// buf is not optional, but offset is optional |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1306 |
assert(buf != NULL, "sanity check"); |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1307 |
|
10565 | 1308 |
Dl_info dlinfo; |
13340 | 1309 |
char localbuf[MACH_MAXSYMLEN]; |
1310 |
||
18683
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1311 |
if (dladdr((void*)addr, &dlinfo) != 0) { |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1312 |
// see if we have a matching symbol |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1313 |
if (dlinfo.dli_saddr != NULL && dlinfo.dli_sname != NULL) { |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1314 |
if (!Decoder::demangle(dlinfo.dli_sname, buf, buflen)) { |
10565 | 1315 |
jio_snprintf(buf, buflen, "%s", dlinfo.dli_sname); |
1316 |
} |
|
18683
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1317 |
if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr; |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1318 |
return true; |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1319 |
} |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1320 |
// no matching symbol so try for just file info |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1321 |
if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != NULL) { |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1322 |
if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase), |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1323 |
buf, buflen, offset, dlinfo.dli_fname)) { |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1324 |
return true; |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1325 |
} |
10565 | 1326 |
} |
18683
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1327 |
|
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1328 |
// Handle non-dynamic manually: |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1329 |
if (dlinfo.dli_fbase != NULL && |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1330 |
Decoder::decode(addr, localbuf, MACH_MAXSYMLEN, offset, |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1331 |
dlinfo.dli_fbase)) { |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1332 |
if (!Decoder::demangle(localbuf, buf, buflen)) { |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1333 |
jio_snprintf(buf, buflen, "%s", localbuf); |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1334 |
} |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1335 |
return true; |
10565 | 1336 |
} |
1337 |
} |
|
18683
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1338 |
buf[0] = '\0'; |
10565 | 1339 |
if (offset != NULL) *offset = -1; |
1340 |
return false; |
|
1341 |
} |
|
1342 |
||
1343 |
// ported from solaris version |
|
1344 |
bool os::dll_address_to_library_name(address addr, char* buf, |
|
1345 |
int buflen, int* offset) { |
|
18683
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1346 |
// buf is not optional, but offset is optional |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1347 |
assert(buf != NULL, "sanity check"); |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1348 |
|
10565 | 1349 |
Dl_info dlinfo; |
1350 |
||
18683
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1351 |
if (dladdr((void*)addr, &dlinfo) != 0) { |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1352 |
if (dlinfo.dli_fname != NULL) { |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1353 |
jio_snprintf(buf, buflen, "%s", dlinfo.dli_fname); |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1354 |
} |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1355 |
if (dlinfo.dli_fbase != NULL && offset != NULL) { |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1356 |
*offset = addr - (address)dlinfo.dli_fbase; |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1357 |
} |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1358 |
return true; |
10565 | 1359 |
} |
18683
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1360 |
|
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1361 |
buf[0] = '\0'; |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1362 |
if (offset) *offset = -1; |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1363 |
return false; |
10565 | 1364 |
} |
14286 | 1365 |
|
1366 |
// Loads .dll/.so and |
|
1367 |
// in case of error it checks if .dll/.so was built for the |
|
1368 |
// same architecture as Hotspot is running on |
|
10565 | 1369 |
|
1370 |
#ifdef __APPLE__ |
|
1371 |
void * os::dll_load(const char *filename, char *ebuf, int ebuflen) { |
|
1372 |
void * result= ::dlopen(filename, RTLD_LAZY); |
|
1373 |
if (result != NULL) { |
|
1374 |
// Successful loading |
|
1375 |
return result; |
|
1376 |
} |
|
1377 |
||
1378 |
// Read system error message into ebuf |
|
1379 |
::strncpy(ebuf, ::dlerror(), ebuflen-1); |
|
1380 |
ebuf[ebuflen-1]='\0'; |
|
1381 |
||
1382 |
return NULL; |
|
1383 |
} |
|
1384 |
#else |
|
1385 |
void * os::dll_load(const char *filename, char *ebuf, int ebuflen) |
|
1386 |
{ |
|
1387 |
void * result= ::dlopen(filename, RTLD_LAZY); |
|
1388 |
if (result != NULL) { |
|
1389 |
// Successful loading |
|
1390 |
return result; |
|
1391 |
} |
|
1392 |
||
1393 |
Elf32_Ehdr elf_head; |
|
1394 |
||
1395 |
// Read system error message into ebuf |
|
1396 |
// It may or may not be overwritten below |
|
1397 |
::strncpy(ebuf, ::dlerror(), ebuflen-1); |
|
1398 |
ebuf[ebuflen-1]='\0'; |
|
1399 |
int diag_msg_max_length=ebuflen-strlen(ebuf); |
|
1400 |
char* diag_msg_buf=ebuf+strlen(ebuf); |
|
1401 |
||
1402 |
if (diag_msg_max_length==0) { |
|
1403 |
// No more space in ebuf for additional diagnostics message |
|
1404 |
return NULL; |
|
1405 |
} |
|
1406 |
||
1407 |
||
1408 |
int file_descriptor= ::open(filename, O_RDONLY | O_NONBLOCK); |
|
1409 |
||
1410 |
if (file_descriptor < 0) { |
|
1411 |
// Can't open library, report dlerror() message |
|
1412 |
return NULL; |
|
1413 |
} |
|
1414 |
||
1415 |
bool failed_to_read_elf_head= |
|
1416 |
(sizeof(elf_head)!= |
|
1417 |
(::read(file_descriptor, &elf_head,sizeof(elf_head)))) ; |
|
1418 |
||
1419 |
::close(file_descriptor); |
|
1420 |
if (failed_to_read_elf_head) { |
|
1421 |
// file i/o error - report dlerror() msg |
|
1422 |
return NULL; |
|
1423 |
} |
|
1424 |
||
1425 |
typedef struct { |
|
1426 |
Elf32_Half code; // Actual value as defined in elf.h |
|
1427 |
Elf32_Half compat_class; // Compatibility of archs at VM's sense |
|
1428 |
char elf_class; // 32 or 64 bit |
|
1429 |
char endianess; // MSB or LSB |
|
1430 |
char* name; // String representation |
|
1431 |
} arch_t; |
|
1432 |
||
1433 |
#ifndef EM_486 |
|
1434 |
#define EM_486 6 /* Intel 80486 */ |
|
1435 |
#endif |
|
1436 |
||
1437 |
#ifndef EM_MIPS_RS3_LE |
|
1438 |
#define EM_MIPS_RS3_LE 10 /* MIPS */ |
|
1439 |
#endif |
|
1440 |
||
1441 |
#ifndef EM_PPC64 |
|
1442 |
#define EM_PPC64 21 /* PowerPC64 */ |
|
1443 |
#endif |
|
1444 |
||
1445 |
#ifndef EM_S390 |
|
1446 |
#define EM_S390 22 /* IBM System/390 */ |
|
1447 |
#endif |
|
1448 |
||
1449 |
#ifndef EM_IA_64 |
|
1450 |
#define EM_IA_64 50 /* HP/Intel IA-64 */ |
|
1451 |
#endif |
|
1452 |
||
1453 |
#ifndef EM_X86_64 |
|
1454 |
#define EM_X86_64 62 /* AMD x86-64 */ |
|
1455 |
#endif |
|
1456 |
||
1457 |
static const arch_t arch_array[]={ |
|
1458 |
{EM_386, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, |
|
1459 |
{EM_486, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, |
|
1460 |
{EM_IA_64, EM_IA_64, ELFCLASS64, ELFDATA2LSB, (char*)"IA 64"}, |
|
1461 |
{EM_X86_64, EM_X86_64, ELFCLASS64, ELFDATA2LSB, (char*)"AMD 64"}, |
|
1462 |
{EM_SPARC, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, |
|
1463 |
{EM_SPARC32PLUS, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, |
|
1464 |
{EM_SPARCV9, EM_SPARCV9, ELFCLASS64, ELFDATA2MSB, (char*)"Sparc v9 64"}, |
|
1465 |
{EM_PPC, EM_PPC, ELFCLASS32, ELFDATA2MSB, (char*)"Power PC 32"}, |
|
1466 |
{EM_PPC64, EM_PPC64, ELFCLASS64, ELFDATA2MSB, (char*)"Power PC 64"}, |
|
1467 |
{EM_ARM, EM_ARM, ELFCLASS32, ELFDATA2LSB, (char*)"ARM"}, |
|
1468 |
{EM_S390, EM_S390, ELFCLASSNONE, ELFDATA2MSB, (char*)"IBM System/390"}, |
|
1469 |
{EM_ALPHA, EM_ALPHA, ELFCLASS64, ELFDATA2LSB, (char*)"Alpha"}, |
|
1470 |
{EM_MIPS_RS3_LE, EM_MIPS_RS3_LE, ELFCLASS32, ELFDATA2LSB, (char*)"MIPSel"}, |
|
1471 |
{EM_MIPS, EM_MIPS, ELFCLASS32, ELFDATA2MSB, (char*)"MIPS"}, |
|
1472 |
{EM_PARISC, EM_PARISC, ELFCLASS32, ELFDATA2MSB, (char*)"PARISC"}, |
|
1473 |
{EM_68K, EM_68K, ELFCLASS32, ELFDATA2MSB, (char*)"M68k"} |
|
1474 |
}; |
|
1475 |
||
1476 |
#if (defined IA32) |
|
1477 |
static Elf32_Half running_arch_code=EM_386; |
|
1478 |
#elif (defined AMD64) |
|
1479 |
static Elf32_Half running_arch_code=EM_X86_64; |
|
1480 |
#elif (defined IA64) |
|
1481 |
static Elf32_Half running_arch_code=EM_IA_64; |
|
1482 |
#elif (defined __sparc) && (defined _LP64) |
|
1483 |
static Elf32_Half running_arch_code=EM_SPARCV9; |
|
1484 |
#elif (defined __sparc) && (!defined _LP64) |
|
1485 |
static Elf32_Half running_arch_code=EM_SPARC; |
|
1486 |
#elif (defined __powerpc64__) |
|
1487 |
static Elf32_Half running_arch_code=EM_PPC64; |
|
1488 |
#elif (defined __powerpc__) |
|
1489 |
static Elf32_Half running_arch_code=EM_PPC; |
|
1490 |
#elif (defined ARM) |
|
1491 |
static Elf32_Half running_arch_code=EM_ARM; |
|
1492 |
#elif (defined S390) |
|
1493 |
static Elf32_Half running_arch_code=EM_S390; |
|
1494 |
#elif (defined ALPHA) |
|
1495 |
static Elf32_Half running_arch_code=EM_ALPHA; |
|
1496 |
#elif (defined MIPSEL) |
|
1497 |
static Elf32_Half running_arch_code=EM_MIPS_RS3_LE; |
|
1498 |
#elif (defined PARISC) |
|
1499 |
static Elf32_Half running_arch_code=EM_PARISC; |
|
1500 |
#elif (defined MIPS) |
|
1501 |
static Elf32_Half running_arch_code=EM_MIPS; |
|
1502 |
#elif (defined M68K) |
|
1503 |
static Elf32_Half running_arch_code=EM_68K; |
|
1504 |
#else |
|
1505 |
#error Method os::dll_load requires that one of following is defined:\ |
|
1506 |
IA32, AMD64, IA64, __sparc, __powerpc__, ARM, S390, ALPHA, MIPS, MIPSEL, PARISC, M68K |
|
1507 |
#endif |
|
1508 |
||
1509 |
// Identify compatability class for VM's architecture and library's architecture |
|
1510 |
// Obtain string descriptions for architectures |
|
1511 |
||
1512 |
arch_t lib_arch={elf_head.e_machine,0,elf_head.e_ident[EI_CLASS], elf_head.e_ident[EI_DATA], NULL}; |
|
1513 |
int running_arch_index=-1; |
|
1514 |
||
1515 |
for (unsigned int i=0 ; i < ARRAY_SIZE(arch_array) ; i++ ) { |
|
1516 |
if (running_arch_code == arch_array[i].code) { |
|
1517 |
running_arch_index = i; |
|
1518 |
} |
|
1519 |
if (lib_arch.code == arch_array[i].code) { |
|
1520 |
lib_arch.compat_class = arch_array[i].compat_class; |
|
1521 |
lib_arch.name = arch_array[i].name; |
|
1522 |
} |
|
1523 |
} |
|
1524 |
||
1525 |
assert(running_arch_index != -1, |
|
1526 |
"Didn't find running architecture code (running_arch_code) in arch_array"); |
|
1527 |
if (running_arch_index == -1) { |
|
1528 |
// Even though running architecture detection failed |
|
1529 |
// we may still continue with reporting dlerror() message |
|
1530 |
return NULL; |
|
1531 |
} |
|
1532 |
||
1533 |
if (lib_arch.endianess != arch_array[running_arch_index].endianess) { |
|
1534 |
::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: endianness mismatch)"); |
|
1535 |
return NULL; |
|
1536 |
} |
|
1537 |
||
1538 |
#ifndef S390 |
|
1539 |
if (lib_arch.elf_class != arch_array[running_arch_index].elf_class) { |
|
1540 |
::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: architecture word width mismatch)"); |
|
1541 |
return NULL; |
|
1542 |
} |
|
1543 |
#endif // !S390 |
|
1544 |
||
1545 |
if (lib_arch.compat_class != arch_array[running_arch_index].compat_class) { |
|
1546 |
if ( lib_arch.name!=NULL ) { |
|
1547 |
::snprintf(diag_msg_buf, diag_msg_max_length-1, |
|
1548 |
" (Possible cause: can't load %s-bit .so on a %s-bit platform)", |
|
1549 |
lib_arch.name, arch_array[running_arch_index].name); |
|
1550 |
} else { |
|
1551 |
::snprintf(diag_msg_buf, diag_msg_max_length-1, |
|
1552 |
" (Possible cause: can't load this .so (machine code=0x%x) on a %s-bit platform)", |
|
1553 |
lib_arch.code, |
|
1554 |
arch_array[running_arch_index].name); |
|
1555 |
} |
|
1556 |
} |
|
1557 |
||
1558 |
return NULL; |
|
1559 |
} |
|
1560 |
#endif /* !__APPLE__ */ |
|
1561 |
||
1562 |
// XXX: Do we need a lock around this as per Linux? |
|
1563 |
void* os::dll_lookup(void* handle, const char* name) { |
|
1564 |
return dlsym(handle, name); |
|
1565 |
} |
|
1566 |
||
1567 |
||
1568 |
static bool _print_ascii_file(const char* filename, outputStream* st) { |
|
1569 |
int fd = ::open(filename, O_RDONLY); |
|
1570 |
if (fd == -1) { |
|
1571 |
return false; |
|
1572 |
} |
|
1573 |
||
1574 |
char buf[32]; |
|
1575 |
int bytes; |
|
1576 |
while ((bytes = ::read(fd, buf, sizeof(buf))) > 0) { |
|
1577 |
st->print_raw(buf, bytes); |
|
1578 |
} |
|
1579 |
||
1580 |
::close(fd); |
|
1581 |
||
1582 |
return true; |
|
1583 |
} |
|
1584 |
||
1585 |
void os::print_dll_info(outputStream *st) { |
|
18683
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1586 |
st->print_cr("Dynamic libraries:"); |
10565 | 1587 |
#ifdef RTLD_DI_LINKMAP |
18683
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1588 |
Dl_info dli; |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1589 |
void *handle; |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1590 |
Link_map *map; |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1591 |
Link_map *p; |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1592 |
|
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1593 |
if (dladdr(CAST_FROM_FN_PTR(void *, os::print_dll_info), &dli) == 0 || |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1594 |
dli.dli_fname == NULL) { |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1595 |
st->print_cr("Error: Cannot print dynamic libraries."); |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1596 |
return; |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1597 |
} |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1598 |
handle = dlopen(dli.dli_fname, RTLD_LAZY); |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1599 |
if (handle == NULL) { |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1600 |
st->print_cr("Error: Cannot print dynamic libraries."); |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1601 |
return; |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1602 |
} |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1603 |
dlinfo(handle, RTLD_DI_LINKMAP, &map); |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1604 |
if (map == NULL) { |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1605 |
st->print_cr("Error: Cannot print dynamic libraries."); |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1606 |
return; |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1607 |
} |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1608 |
|
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1609 |
while (map->l_prev != NULL) |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1610 |
map = map->l_prev; |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1611 |
|
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1612 |
while (map != NULL) { |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1613 |
st->print_cr(PTR_FORMAT " \t%s", map->l_addr, map->l_name); |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1614 |
map = map->l_next; |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1615 |
} |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1616 |
|
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1617 |
dlclose(handle); |
10565 | 1618 |
#elif defined(__APPLE__) |
18683
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1619 |
uint32_t count; |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1620 |
uint32_t i; |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1621 |
|
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1622 |
count = _dyld_image_count(); |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1623 |
for (i = 1; i < count; i++) { |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1624 |
const char *name = _dyld_get_image_name(i); |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1625 |
intptr_t slide = _dyld_get_image_vmaddr_slide(i); |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1626 |
st->print_cr(PTR_FORMAT " \t%s", slide, name); |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1627 |
} |
10565 | 1628 |
#else |
18683
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1629 |
st->print_cr("Error: Cannot print dynamic libraries."); |
10565 | 1630 |
#endif |
1631 |
} |
|
1632 |
||
12735
3e2e491f4f69
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
12101
diff
changeset
|
1633 |
void os::print_os_info_brief(outputStream* st) { |
3e2e491f4f69
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
12101
diff
changeset
|
1634 |
st->print("Bsd"); |
3e2e491f4f69
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
12101
diff
changeset
|
1635 |
|
3e2e491f4f69
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
12101
diff
changeset
|
1636 |
os::Posix::print_uname_info(st); |
3e2e491f4f69
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
12101
diff
changeset
|
1637 |
} |
10565 | 1638 |
|
1639 |
void os::print_os_info(outputStream* st) { |
|
1640 |
st->print("OS:"); |
|
12735
3e2e491f4f69
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
12101
diff
changeset
|
1641 |
st->print("Bsd"); |
3e2e491f4f69
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
12101
diff
changeset
|
1642 |
|
3e2e491f4f69
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
12101
diff
changeset
|
1643 |
os::Posix::print_uname_info(st); |
3e2e491f4f69
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
12101
diff
changeset
|
1644 |
|
3e2e491f4f69
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
12101
diff
changeset
|
1645 |
os::Posix::print_rlimit_info(st); |
3e2e491f4f69
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
12101
diff
changeset
|
1646 |
|
3e2e491f4f69
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
12101
diff
changeset
|
1647 |
os::Posix::print_load_average(st); |
10565 | 1648 |
} |
1649 |
||
1650 |
void os::pd_print_cpu_info(outputStream* st) { |
|
1651 |
// Nothing to do for now. |
|
1652 |
} |
|
1653 |
||
1654 |
void os::print_memory_info(outputStream* st) { |
|
1655 |
||
1656 |
st->print("Memory:"); |
|
1657 |
st->print(" %dk page", os::vm_page_size()>>10); |
|
1658 |
||
1659 |
st->print(", physical " UINT64_FORMAT "k", |
|
1660 |
os::physical_memory() >> 10); |
|
1661 |
st->print("(" UINT64_FORMAT "k free)", |
|
1662 |
os::available_memory() >> 10); |
|
1663 |
st->cr(); |
|
1664 |
||
1665 |
// meminfo |
|
1666 |
st->print("\n/proc/meminfo:\n"); |
|
1667 |
_print_ascii_file("/proc/meminfo", st); |
|
1668 |
st->cr(); |
|
1669 |
} |
|
1670 |
||
1671 |
// Taken from /usr/include/bits/siginfo.h Supposed to be architecture specific |
|
1672 |
// but they're the same for all the bsd arch that we support |
|
1673 |
// and they're the same for solaris but there's no common place to put this. |
|
1674 |
const char *ill_names[] = { "ILL0", "ILL_ILLOPC", "ILL_ILLOPN", "ILL_ILLADR", |
|
1675 |
"ILL_ILLTRP", "ILL_PRVOPC", "ILL_PRVREG", |
|
1676 |
"ILL_COPROC", "ILL_BADSTK" }; |
|
1677 |
||
1678 |
const char *fpe_names[] = { "FPE0", "FPE_INTDIV", "FPE_INTOVF", "FPE_FLTDIV", |
|
1679 |
"FPE_FLTOVF", "FPE_FLTUND", "FPE_FLTRES", |
|
1680 |
"FPE_FLTINV", "FPE_FLTSUB", "FPE_FLTDEN" }; |
|
1681 |
||
1682 |
const char *segv_names[] = { "SEGV0", "SEGV_MAPERR", "SEGV_ACCERR" }; |
|
1683 |
||
1684 |
const char *bus_names[] = { "BUS0", "BUS_ADRALN", "BUS_ADRERR", "BUS_OBJERR" }; |
|
1685 |
||
1686 |
void os::print_siginfo(outputStream* st, void* siginfo) { |
|
1687 |
st->print("siginfo:"); |
|
1688 |
||
1689 |
const int buflen = 100; |
|
1690 |
char buf[buflen]; |
|
1691 |
siginfo_t *si = (siginfo_t*)siginfo; |
|
1692 |
st->print("si_signo=%s: ", os::exception_name(si->si_signo, buf, buflen)); |
|
1693 |
if (si->si_errno != 0 && strerror_r(si->si_errno, buf, buflen) == 0) { |
|
1694 |
st->print("si_errno=%s", buf); |
|
1695 |
} else { |
|
1696 |
st->print("si_errno=%d", si->si_errno); |
|
1697 |
} |
|
1698 |
const int c = si->si_code; |
|
1699 |
assert(c > 0, "unexpected si_code"); |
|
1700 |
switch (si->si_signo) { |
|
1701 |
case SIGILL: |
|
1702 |
st->print(", si_code=%d (%s)", c, c > 8 ? "" : ill_names[c]); |
|
1703 |
st->print(", si_addr=" PTR_FORMAT, si->si_addr); |
|
1704 |
break; |
|
1705 |
case SIGFPE: |
|
1706 |
st->print(", si_code=%d (%s)", c, c > 9 ? "" : fpe_names[c]); |
|
1707 |
st->print(", si_addr=" PTR_FORMAT, si->si_addr); |
|
1708 |
break; |
|
1709 |
case SIGSEGV: |
|
1710 |
st->print(", si_code=%d (%s)", c, c > 2 ? "" : segv_names[c]); |
|
1711 |
st->print(", si_addr=" PTR_FORMAT, si->si_addr); |
|
1712 |
break; |
|
1713 |
case SIGBUS: |
|
1714 |
st->print(", si_code=%d (%s)", c, c > 3 ? "" : bus_names[c]); |
|
1715 |
st->print(", si_addr=" PTR_FORMAT, si->si_addr); |
|
1716 |
break; |
|
1717 |
default: |
|
1718 |
st->print(", si_code=%d", si->si_code); |
|
1719 |
// no si_addr |
|
1720 |
} |
|
1721 |
||
1722 |
if ((si->si_signo == SIGBUS || si->si_signo == SIGSEGV) && |
|
1723 |
UseSharedSpaces) { |
|
1724 |
FileMapInfo* mapinfo = FileMapInfo::current_info(); |
|
1725 |
if (mapinfo->is_in_shared_space(si->si_addr)) { |
|
1726 |
st->print("\n\nError accessing class data sharing archive." \ |
|
1727 |
" Mapped file inaccessible during execution, " \ |
|
1728 |
" possible disk/network problem."); |
|
1729 |
} |
|
1730 |
} |
|
1731 |
st->cr(); |
|
1732 |
} |
|
1733 |
||
1734 |
||
1735 |
static void print_signal_handler(outputStream* st, int sig, |
|
1736 |
char* buf, size_t buflen); |
|
1737 |
||
1738 |
void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) { |
|
1739 |
st->print_cr("Signal Handlers:"); |
|
1740 |
print_signal_handler(st, SIGSEGV, buf, buflen); |
|
1741 |
print_signal_handler(st, SIGBUS , buf, buflen); |
|
1742 |
print_signal_handler(st, SIGFPE , buf, buflen); |
|
1743 |
print_signal_handler(st, SIGPIPE, buf, buflen); |
|
1744 |
print_signal_handler(st, SIGXFSZ, buf, buflen); |
|
1745 |
print_signal_handler(st, SIGILL , buf, buflen); |
|
1746 |
print_signal_handler(st, INTERRUPT_SIGNAL, buf, buflen); |
|
1747 |
print_signal_handler(st, SR_signum, buf, buflen); |
|
1748 |
print_signal_handler(st, SHUTDOWN1_SIGNAL, buf, buflen); |
|
1749 |
print_signal_handler(st, SHUTDOWN2_SIGNAL , buf, buflen); |
|
1750 |
print_signal_handler(st, SHUTDOWN3_SIGNAL , buf, buflen); |
|
1751 |
print_signal_handler(st, BREAK_SIGNAL, buf, buflen); |
|
1752 |
} |
|
1753 |
||
1754 |
static char saved_jvm_path[MAXPATHLEN] = {0}; |
|
1755 |
||
15096
3db45569f8c0
8005044: remove crufty '_g' support from HS runtime code
dcubed
parents:
14633
diff
changeset
|
1756 |
// Find the full path to the current module, libjvm |
10565 | 1757 |
void os::jvm_path(char *buf, jint buflen) { |
1758 |
// Error checking. |
|
1759 |
if (buflen < MAXPATHLEN) { |
|
1760 |
assert(false, "must use a large-enough buffer"); |
|
1761 |
buf[0] = '\0'; |
|
1762 |
return; |
|
1763 |
} |
|
1764 |
// Lazy resolve the path to current module. |
|
1765 |
if (saved_jvm_path[0] != 0) { |
|
1766 |
strcpy(buf, saved_jvm_path); |
|
1767 |
return; |
|
1768 |
} |
|
1769 |
||
1770 |
char dli_fname[MAXPATHLEN]; |
|
1771 |
bool ret = dll_address_to_library_name( |
|
1772 |
CAST_FROM_FN_PTR(address, os::jvm_path), |
|
1773 |
dli_fname, sizeof(dli_fname), NULL); |
|
18683
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1774 |
assert(ret, "cannot locate libjvm"); |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1775 |
char *rp = NULL; |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1776 |
if (ret && dli_fname[0] != '\0') { |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1777 |
rp = realpath(dli_fname, buf); |
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
1778 |
} |
10565 | 1779 |
if (rp == NULL) |
1780 |
return; |
|
1781 |
||
1782 |
if (Arguments::created_by_gamma_launcher()) { |
|
1783 |
// Support for the gamma launcher. Typical value for buf is |
|
11593 | 1784 |
// "<JAVA_HOME>/jre/lib/<arch>/<vmtype>/libjvm". If "/jre/lib/" appears at |
10565 | 1785 |
// the right place in the string, then assume we are installed in a JDK and |
11593 | 1786 |
// we're done. Otherwise, check for a JAVA_HOME environment variable and |
1787 |
// construct a path to the JVM being overridden. |
|
1788 |
||
10565 | 1789 |
const char *p = buf + strlen(buf) - 1; |
1790 |
for (int count = 0; p > buf && count < 5; ++count) { |
|
1791 |
for (--p; p > buf && *p != '/'; --p) |
|
1792 |
/* empty */ ; |
|
1793 |
} |
|
1794 |
||
1795 |
if (strncmp(p, "/jre/lib/", 9) != 0) { |
|
1796 |
// Look for JAVA_HOME in the environment. |
|
1797 |
char* java_home_var = ::getenv("JAVA_HOME"); |
|
1798 |
if (java_home_var != NULL && java_home_var[0] != 0) { |
|
1799 |
char* jrelib_p; |
|
1800 |
int len; |
|
1801 |
||
15096
3db45569f8c0
8005044: remove crufty '_g' support from HS runtime code
dcubed
parents:
14633
diff
changeset
|
1802 |
// Check the current module name "libjvm" |
10565 | 1803 |
p = strrchr(buf, '/'); |
1804 |
assert(strstr(p, "/libjvm") == p, "invalid library name"); |
|
1805 |
||
1806 |
rp = realpath(java_home_var, buf); |
|
1807 |
if (rp == NULL) |
|
1808 |
return; |
|
1809 |
||
1810 |
// determine if this is a legacy image or modules image |
|
1811 |
// modules image doesn't have "jre" subdirectory |
|
1812 |
len = strlen(buf); |
|
1813 |
jrelib_p = buf + len; |
|
11593 | 1814 |
|
1815 |
// Add the appropriate library subdir |
|
1816 |
snprintf(jrelib_p, buflen-len, "/jre/lib"); |
|
10565 | 1817 |
if (0 != access(buf, F_OK)) { |
11593 | 1818 |
snprintf(jrelib_p, buflen-len, "/lib"); |
10565 | 1819 |
} |
1820 |
||
11593 | 1821 |
// Add the appropriate client or server subdir |
1822 |
len = strlen(buf); |
|
1823 |
jrelib_p = buf + len; |
|
1824 |
snprintf(jrelib_p, buflen-len, "/%s", COMPILER_VARIANT); |
|
1825 |
if (0 != access(buf, F_OK)) { |
|
1826 |
snprintf(jrelib_p, buflen-len, ""); |
|
1827 |
} |
|
1828 |
||
1829 |
// If the path exists within JAVA_HOME, add the JVM library name |
|
1830 |
// to complete the path to JVM being overridden. Otherwise fallback |
|
1831 |
// to the path to the current library. |
|
10565 | 1832 |
if (0 == access(buf, F_OK)) { |
15096
3db45569f8c0
8005044: remove crufty '_g' support from HS runtime code
dcubed
parents:
14633
diff
changeset
|
1833 |
// Use current module name "libjvm" |
10565 | 1834 |
len = strlen(buf); |
15096
3db45569f8c0
8005044: remove crufty '_g' support from HS runtime code
dcubed
parents:
14633
diff
changeset
|
1835 |
snprintf(buf + len, buflen-len, "/libjvm%s", JNI_LIB_SUFFIX); |
10565 | 1836 |
} else { |
11593 | 1837 |
// Fall back to path of current library |
10565 | 1838 |
rp = realpath(dli_fname, buf); |
1839 |
if (rp == NULL) |
|
1840 |
return; |
|
1841 |
} |
|
1842 |
} |
|
1843 |
} |
|
1844 |
} |
|
1845 |
||
1846 |
strcpy(saved_jvm_path, buf); |
|
1847 |
} |
|
1848 |
||
1849 |
void os::print_jni_name_prefix_on(outputStream* st, int args_size) { |
|
1850 |
// no prefix required, not even "_" |
|
1851 |
} |
|
1852 |
||
1853 |
void os::print_jni_name_suffix_on(outputStream* st, int args_size) { |
|
1854 |
// no suffix required |
|
1855 |
} |
|
1856 |
||
1857 |
//////////////////////////////////////////////////////////////////////////////// |
|
1858 |
// sun.misc.Signal support |
|
1859 |
||
1860 |
static volatile jint sigint_count = 0; |
|
1861 |
||
1862 |
static void |
|
1863 |
UserHandler(int sig, void *siginfo, void *context) { |
|
1864 |
// 4511530 - sem_post is serialized and handled by the manager thread. When |
|
1865 |
// the program is interrupted by Ctrl-C, SIGINT is sent to every thread. We |
|
1866 |
// don't want to flood the manager thread with sem_post requests. |
|
1867 |
if (sig == SIGINT && Atomic::add(1, &sigint_count) > 1) |
|
1868 |
return; |
|
1869 |
||
1870 |
// Ctrl-C is pressed during error reporting, likely because the error |
|
1871 |
// handler fails to abort. Let VM die immediately. |
|
1872 |
if (sig == SIGINT && is_error_reported()) { |
|
1873 |
os::die(); |
|
1874 |
} |
|
1875 |
||
1876 |
os::signal_notify(sig); |
|
1877 |
} |
|
1878 |
||
1879 |
void* os::user_handler() { |
|
1880 |
return CAST_FROM_FN_PTR(void*, UserHandler); |
|
1881 |
} |
|
1882 |
||
1883 |
extern "C" { |
|
1884 |
typedef void (*sa_handler_t)(int); |
|
1885 |
typedef void (*sa_sigaction_t)(int, siginfo_t *, void *); |
|
1886 |
} |
|
1887 |
||
1888 |
void* os::signal(int signal_number, void* handler) { |
|
1889 |
struct sigaction sigAct, oldSigAct; |
|
1890 |
||
1891 |
sigfillset(&(sigAct.sa_mask)); |
|
1892 |
sigAct.sa_flags = SA_RESTART|SA_SIGINFO; |
|
1893 |
sigAct.sa_handler = CAST_TO_FN_PTR(sa_handler_t, handler); |
|
1894 |
||
1895 |
if (sigaction(signal_number, &sigAct, &oldSigAct)) { |
|
1896 |
// -1 means registration failed |
|
1897 |
return (void *)-1; |
|
1898 |
} |
|
1899 |
||
1900 |
return CAST_FROM_FN_PTR(void*, oldSigAct.sa_handler); |
|
1901 |
} |
|
1902 |
||
1903 |
void os::signal_raise(int signal_number) { |
|
1904 |
::raise(signal_number); |
|
1905 |
} |
|
1906 |
||
1907 |
/* |
|
1908 |
* The following code is moved from os.cpp for making this |
|
1909 |
* code platform specific, which it is by its very nature. |
|
1910 |
*/ |
|
1911 |
||
1912 |
// Will be modified when max signal is changed to be dynamic |
|
1913 |
int os::sigexitnum_pd() { |
|
1914 |
return NSIG; |
|
1915 |
} |
|
1916 |
||
1917 |
// a counter for each possible signal value |
|
1918 |
static volatile jint pending_signals[NSIG+1] = { 0 }; |
|
1919 |
||
1920 |
// Bsd(POSIX) specific hand shaking semaphore. |
|
1921 |
#ifdef __APPLE__ |
|
18025 | 1922 |
typedef semaphore_t os_semaphore_t; |
10565 | 1923 |
#define SEM_INIT(sem, value) semaphore_create(mach_task_self(), &sem, SYNC_POLICY_FIFO, value) |
18025 | 1924 |
#define SEM_WAIT(sem) semaphore_wait(sem) |
1925 |
#define SEM_POST(sem) semaphore_signal(sem) |
|
1926 |
#define SEM_DESTROY(sem) semaphore_destroy(mach_task_self(), sem) |
|
10565 | 1927 |
#else |
18025 | 1928 |
typedef sem_t os_semaphore_t; |
10565 | 1929 |
#define SEM_INIT(sem, value) sem_init(&sem, 0, value) |
18025 | 1930 |
#define SEM_WAIT(sem) sem_wait(&sem) |
1931 |
#define SEM_POST(sem) sem_post(&sem) |
|
1932 |
#define SEM_DESTROY(sem) sem_destroy(&sem) |
|
10565 | 1933 |
#endif |
1934 |
||
18025 | 1935 |
class Semaphore : public StackObj { |
1936 |
public: |
|
1937 |
Semaphore(); |
|
1938 |
~Semaphore(); |
|
1939 |
void signal(); |
|
1940 |
void wait(); |
|
1941 |
bool trywait(); |
|
1942 |
bool timedwait(unsigned int sec, int nsec); |
|
1943 |
private: |
|
1944 |
jlong currenttime() const; |
|
20373
5d68702ea998
8025283: Nits in os_bsd file breaks compilation of open hotspot
dsamersoff
parents:
19986
diff
changeset
|
1945 |
os_semaphore_t _semaphore; |
18025 | 1946 |
}; |
1947 |
||
1948 |
Semaphore::Semaphore() : _semaphore(0) { |
|
1949 |
SEM_INIT(_semaphore, 0); |
|
1950 |
} |
|
1951 |
||
1952 |
Semaphore::~Semaphore() { |
|
1953 |
SEM_DESTROY(_semaphore); |
|
1954 |
} |
|
1955 |
||
1956 |
void Semaphore::signal() { |
|
1957 |
SEM_POST(_semaphore); |
|
1958 |
} |
|
1959 |
||
1960 |
void Semaphore::wait() { |
|
1961 |
SEM_WAIT(_semaphore); |
|
1962 |
} |
|
1963 |
||
1964 |
jlong Semaphore::currenttime() const { |
|
1965 |
struct timeval tv; |
|
1966 |
gettimeofday(&tv, NULL); |
|
1967 |
return (tv.tv_sec * NANOSECS_PER_SEC) + (tv.tv_usec * 1000); |
|
1968 |
} |
|
1969 |
||
1970 |
#ifdef __APPLE__ |
|
1971 |
bool Semaphore::trywait() { |
|
1972 |
return timedwait(0, 0); |
|
1973 |
} |
|
1974 |
||
1975 |
bool Semaphore::timedwait(unsigned int sec, int nsec) { |
|
1976 |
kern_return_t kr = KERN_ABORTED; |
|
1977 |
mach_timespec_t waitspec; |
|
1978 |
waitspec.tv_sec = sec; |
|
1979 |
waitspec.tv_nsec = nsec; |
|
1980 |
||
1981 |
jlong starttime = currenttime(); |
|
1982 |
||
1983 |
kr = semaphore_timedwait(_semaphore, waitspec); |
|
1984 |
while (kr == KERN_ABORTED) { |
|
1985 |
jlong totalwait = (sec * NANOSECS_PER_SEC) + nsec; |
|
1986 |
||
1987 |
jlong current = currenttime(); |
|
1988 |
jlong passedtime = current - starttime; |
|
1989 |
||
1990 |
if (passedtime >= totalwait) { |
|
1991 |
waitspec.tv_sec = 0; |
|
1992 |
waitspec.tv_nsec = 0; |
|
1993 |
} else { |
|
1994 |
jlong waittime = totalwait - (current - starttime); |
|
1995 |
waitspec.tv_sec = waittime / NANOSECS_PER_SEC; |
|
1996 |
waitspec.tv_nsec = waittime % NANOSECS_PER_SEC; |
|
1997 |
} |
|
1998 |
||
1999 |
kr = semaphore_timedwait(_semaphore, waitspec); |
|
2000 |
} |
|
2001 |
||
2002 |
return kr == KERN_SUCCESS; |
|
2003 |
} |
|
2004 |
||
2005 |
#else |
|
2006 |
||
2007 |
bool Semaphore::trywait() { |
|
2008 |
return sem_trywait(&_semaphore) == 0; |
|
2009 |
} |
|
2010 |
||
2011 |
bool Semaphore::timedwait(unsigned int sec, int nsec) { |
|
2012 |
struct timespec ts; |
|
20373
5d68702ea998
8025283: Nits in os_bsd file breaks compilation of open hotspot
dsamersoff
parents:
19986
diff
changeset
|
2013 |
unpackTime(&ts, false, (sec * NANOSECS_PER_SEC) + nsec); |
18025 | 2014 |
|
2015 |
while (1) { |
|
2016 |
int result = sem_timedwait(&_semaphore, &ts); |
|
2017 |
if (result == 0) { |
|
2018 |
return true; |
|
2019 |
} else if (errno == EINTR) { |
|
2020 |
continue; |
|
2021 |
} else if (errno == ETIMEDOUT) { |
|
2022 |
return false; |
|
2023 |
} else { |
|
2024 |
return false; |
|
2025 |
} |
|
2026 |
} |
|
2027 |
} |
|
2028 |
||
2029 |
#endif // __APPLE__ |
|
2030 |
||
2031 |
static os_semaphore_t sig_sem; |
|
2032 |
static Semaphore sr_semaphore; |
|
2033 |
||
10565 | 2034 |
void os::signal_init_pd() { |
2035 |
// Initialize signal structures |
|
2036 |
::memset((void*)pending_signals, 0, sizeof(pending_signals)); |
|
2037 |
||
2038 |
// Initialize signal semaphore |
|
2039 |
::SEM_INIT(sig_sem, 0); |
|
2040 |
} |
|
2041 |
||
2042 |
void os::signal_notify(int sig) { |
|
2043 |
Atomic::inc(&pending_signals[sig]); |
|
2044 |
::SEM_POST(sig_sem); |
|
2045 |
} |
|
2046 |
||
2047 |
static int check_pending_signals(bool wait) { |
|
2048 |
Atomic::store(0, &sigint_count); |
|
2049 |
for (;;) { |
|
2050 |
for (int i = 0; i < NSIG + 1; i++) { |
|
2051 |
jint n = pending_signals[i]; |
|
2052 |
if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) { |
|
2053 |
return i; |
|
2054 |
} |
|
2055 |
} |
|
2056 |
if (!wait) { |
|
2057 |
return -1; |
|
2058 |
} |
|
2059 |
JavaThread *thread = JavaThread::current(); |
|
2060 |
ThreadBlockInVM tbivm(thread); |
|
2061 |
||
2062 |
bool threadIsSuspended; |
|
2063 |
do { |
|
2064 |
thread->set_suspend_equivalent(); |
|
2065 |
// cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() |
|
2066 |
::SEM_WAIT(sig_sem); |
|
2067 |
||
2068 |
// were we externally suspended while we were waiting? |
|
2069 |
threadIsSuspended = thread->handle_special_suspend_equivalent_condition(); |
|
2070 |
if (threadIsSuspended) { |
|
2071 |
// |
|
2072 |
// The semaphore has been incremented, but while we were waiting |
|
2073 |
// another thread suspended us. We don't want to continue running |
|
2074 |
// while suspended because that would surprise the thread that |
|
2075 |
// suspended us. |
|
2076 |
// |
|
2077 |
::SEM_POST(sig_sem); |
|
2078 |
||
2079 |
thread->java_suspend_self(); |
|
2080 |
} |
|
2081 |
} while (threadIsSuspended); |
|
2082 |
} |
|
2083 |
} |
|
2084 |
||
2085 |
int os::signal_lookup() { |
|
2086 |
return check_pending_signals(false); |
|
2087 |
} |
|
2088 |
||
2089 |
int os::signal_wait() { |
|
2090 |
return check_pending_signals(true); |
|
2091 |
} |
|
2092 |
||
2093 |
//////////////////////////////////////////////////////////////////////////////// |
|
2094 |
// Virtual Memory |
|
2095 |
||
2096 |
int os::vm_page_size() { |
|
2097 |
// Seems redundant as all get out |
|
2098 |
assert(os::Bsd::page_size() != -1, "must call os::init"); |
|
2099 |
return os::Bsd::page_size(); |
|
2100 |
} |
|
2101 |
||
2102 |
// Solaris allocates memory by pages. |
|
2103 |
int os::vm_allocation_granularity() { |
|
2104 |
assert(os::Bsd::page_size() != -1, "must call os::init"); |
|
2105 |
return os::Bsd::page_size(); |
|
2106 |
} |
|
2107 |
||
2108 |
// Rationale behind this function: |
|
2109 |
// current (Mon Apr 25 20:12:18 MSD 2005) oprofile drops samples without executable |
|
2110 |
// mapping for address (see lookup_dcookie() in the kernel module), thus we cannot get |
|
2111 |
// samples for JITted code. Here we create private executable mapping over the code cache |
|
2112 |
// and then we can use standard (well, almost, as mapping can change) way to provide |
|
2113 |
// info for the reporting script by storing timestamp and location of symbol |
|
2114 |
void bsd_wrap_code(char* base, size_t size) { |
|
2115 |
static volatile jint cnt = 0; |
|
2116 |
||
2117 |
if (!UseOprofile) { |
|
2118 |
return; |
|
2119 |
} |
|
2120 |
||
2121 |
char buf[PATH_MAX + 1]; |
|
2122 |
int num = Atomic::add(1, &cnt); |
|
2123 |
||
2124 |
snprintf(buf, PATH_MAX + 1, "%s/hs-vm-%d-%d", |
|
2125 |
os::get_temp_directory(), os::current_process_id(), num); |
|
2126 |
unlink(buf); |
|
2127 |
||
2128 |
int fd = ::open(buf, O_CREAT | O_RDWR, S_IRWXU); |
|
2129 |
||
2130 |
if (fd != -1) { |
|
2131 |
off_t rv = ::lseek(fd, size-2, SEEK_SET); |
|
2132 |
if (rv != (off_t)-1) { |
|
2133 |
if (::write(fd, "", 1) == 1) { |
|
2134 |
mmap(base, size, |
|
2135 |
PROT_READ|PROT_WRITE|PROT_EXEC, |
|
2136 |
MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE, fd, 0); |
|
2137 |
} |
|
2138 |
} |
|
2139 |
::close(fd); |
|
2140 |
unlink(buf); |
|
2141 |
} |
|
2142 |
} |
|
2143 |
||
18069
e6d4971c8650
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
18025
diff
changeset
|
2144 |
static void warn_fail_commit_memory(char* addr, size_t size, bool exec, |
e6d4971c8650
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
18025
diff
changeset
|
2145 |
int err) { |
e6d4971c8650
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
18025
diff
changeset
|
2146 |
warning("INFO: os::commit_memory(" PTR_FORMAT ", " SIZE_FORMAT |
e6d4971c8650
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
18025
diff
changeset
|
2147 |
", %d) failed; error='%s' (errno=%d)", addr, size, exec, |
e6d4971c8650
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
18025
diff
changeset
|
2148 |
strerror(err), err); |
e6d4971c8650
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
18025
diff
changeset
|
2149 |
} |
e6d4971c8650
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
18025
diff
changeset
|
2150 |
|
10565 | 2151 |
// NOTE: Bsd kernel does not really reserve the pages for us. |
2152 |
// All it does is to check if there are enough free pages |
|
2153 |
// left at the time of mmap(). This could be a potential |
|
2154 |
// problem. |
|
13195 | 2155 |
bool os::pd_commit_memory(char* addr, size_t size, bool exec) { |
10565 | 2156 |
int prot = exec ? PROT_READ|PROT_WRITE|PROT_EXEC : PROT_READ|PROT_WRITE; |
2157 |
#ifdef __OpenBSD__ |
|
2158 |
// XXX: Work-around mmap/MAP_FIXED bug temporarily on OpenBSD |
|
18069
e6d4971c8650
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
18025
diff
changeset
|
2159 |
if (::mprotect(addr, size, prot) == 0) { |
e6d4971c8650
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
18025
diff
changeset
|
2160 |
return true; |
e6d4971c8650
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
18025
diff
changeset
|
2161 |
} |
10565 | 2162 |
#else |
2163 |
uintptr_t res = (uintptr_t) ::mmap(addr, size, prot, |
|
2164 |
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0); |
|
18069
e6d4971c8650
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
18025
diff
changeset
|
2165 |
if (res != (uintptr_t) MAP_FAILED) { |
e6d4971c8650
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
18025
diff
changeset
|
2166 |
return true; |
e6d4971c8650
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
18025
diff
changeset
|
2167 |
} |
10565 | 2168 |
#endif |
18069
e6d4971c8650
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
18025
diff
changeset
|
2169 |
|
e6d4971c8650
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
18025
diff
changeset
|
2170 |
// Warn about any commit errors we see in non-product builds just |
e6d4971c8650
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
18025
diff
changeset
|
2171 |
// in case mmap() doesn't work as described on the man page. |
e6d4971c8650
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
18025
diff
changeset
|
2172 |
NOT_PRODUCT(warn_fail_commit_memory(addr, size, exec, errno);) |
e6d4971c8650
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
18025
diff
changeset
|
2173 |
|
e6d4971c8650
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
18025
diff
changeset
|
2174 |
return false; |
10565 | 2175 |
} |
2176 |
||
13195 | 2177 |
bool os::pd_commit_memory(char* addr, size_t size, size_t alignment_hint, |
10565 | 2178 |
bool exec) { |
18069
e6d4971c8650
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
18025
diff
changeset
|
2179 |
// alignment_hint is ignored on this OS |
e6d4971c8650
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
18025
diff
changeset
|
2180 |
return pd_commit_memory(addr, size, exec); |
e6d4971c8650
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
18025
diff
changeset
|
2181 |
} |
e6d4971c8650
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
18025
diff
changeset
|
2182 |
|
e6d4971c8650
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
18025
diff
changeset
|
2183 |
void os::pd_commit_memory_or_exit(char* addr, size_t size, bool exec, |
e6d4971c8650
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
18025
diff
changeset
|
2184 |
const char* mesg) { |
e6d4971c8650
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
18025
diff
changeset
|
2185 |
assert(mesg != NULL, "mesg must be specified"); |
e6d4971c8650
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
18025
diff
changeset
|
2186 |
if (!pd_commit_memory(addr, size, exec)) { |
e6d4971c8650
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
18025
diff
changeset
|
2187 |
// add extra info in product mode for vm_exit_out_of_memory(): |
e6d4971c8650
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
18025
diff
changeset
|
2188 |
PRODUCT_ONLY(warn_fail_commit_memory(addr, size, exec, errno);) |
e6d4971c8650
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
18025
diff
changeset
|
2189 |
vm_exit_out_of_memory(size, OOM_MMAP_ERROR, mesg); |
e6d4971c8650
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
18025
diff
changeset
|
2190 |
} |
e6d4971c8650
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
18025
diff
changeset
|
2191 |
} |
e6d4971c8650
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
18025
diff
changeset
|
2192 |
|
e6d4971c8650
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
18025
diff
changeset
|
2193 |
void os::pd_commit_memory_or_exit(char* addr, size_t size, |
e6d4971c8650
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
18025
diff
changeset
|
2194 |
size_t alignment_hint, bool exec, |
e6d4971c8650
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
18025
diff
changeset
|
2195 |
const char* mesg) { |
e6d4971c8650
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
18025
diff
changeset
|
2196 |
// alignment_hint is ignored on this OS |
e6d4971c8650
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
18025
diff
changeset
|
2197 |
pd_commit_memory_or_exit(addr, size, exec, mesg); |
10565 | 2198 |
} |
2199 |
||
13195 | 2200 |
void os::pd_realign_memory(char *addr, size_t bytes, size_t alignment_hint) { |
10565 | 2201 |
} |
2202 |
||
13195 | 2203 |
void os::pd_free_memory(char *addr, size_t bytes, size_t alignment_hint) { |
10565 | 2204 |
::madvise(addr, bytes, MADV_DONTNEED); |
2205 |
} |
|
2206 |
||
2207 |
void os::numa_make_global(char *addr, size_t bytes) { |
|
2208 |
} |
|
2209 |
||
2210 |
void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) { |
|
2211 |
} |
|
2212 |
||
2213 |
bool os::numa_topology_changed() { return false; } |
|
2214 |
||
2215 |
size_t os::numa_get_groups_num() { |
|
2216 |
return 1; |
|
2217 |
} |
|
2218 |
||
2219 |
int os::numa_get_group_id() { |
|
2220 |
return 0; |
|
2221 |
} |
|
2222 |
||
2223 |
size_t os::numa_get_leaf_groups(int *ids, size_t size) { |
|
2224 |
if (size > 0) { |
|
2225 |
ids[0] = 0; |
|
2226 |
return 1; |
|
2227 |
} |
|
2228 |
return 0; |
|
2229 |
} |
|
2230 |
||
2231 |
bool os::get_page_info(char *start, page_info* info) { |
|
2232 |
return false; |
|
2233 |
} |
|
2234 |
||
2235 |
char *os::scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found) { |
|
2236 |
return end; |
|
2237 |
} |
|
2238 |
||
2239 |
||
13195 | 2240 |
bool os::pd_uncommit_memory(char* addr, size_t size) { |
10565 | 2241 |
#ifdef __OpenBSD__ |
2242 |
// XXX: Work-around mmap/MAP_FIXED bug temporarily on OpenBSD |
|
2243 |
return ::mprotect(addr, size, PROT_NONE) == 0; |
|
2244 |
#else |
|
2245 |
uintptr_t res = (uintptr_t) ::mmap(addr, size, PROT_NONE, |
|
2246 |
MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE|MAP_ANONYMOUS, -1, 0); |
|
2247 |
return res != (uintptr_t) MAP_FAILED; |
|
2248 |
#endif |
|
2249 |
} |
|
2250 |
||
13195 | 2251 |
bool os::pd_create_stack_guard_pages(char* addr, size_t size) { |
18069
e6d4971c8650
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
18025
diff
changeset
|
2252 |
return os::commit_memory(addr, size, !ExecMem); |
10565 | 2253 |
} |
2254 |
||
2255 |
// If this is a growable mapping, remove the guard pages entirely by |
|
2256 |
// munmap()ping them. If not, just call uncommit_memory(). |
|
2257 |
bool os::remove_stack_guard_pages(char* addr, size_t size) { |
|
2258 |
return os::uncommit_memory(addr, size); |
|
2259 |
} |
|
2260 |
||
2261 |
static address _highest_vm_reserved_address = NULL; |
|
2262 |
||
2263 |
// If 'fixed' is true, anon_mmap() will attempt to reserve anonymous memory |
|
2264 |
// at 'requested_addr'. If there are existing memory mappings at the same |
|
2265 |
// location, however, they will be overwritten. If 'fixed' is false, |
|
2266 |
// 'requested_addr' is only treated as a hint, the return value may or |
|
2267 |
// may not start from the requested address. Unlike Bsd mmap(), this |
|
2268 |
// function returns NULL to indicate failure. |
|
2269 |
static char* anon_mmap(char* requested_addr, size_t bytes, bool fixed) { |
|
2270 |
char * addr; |
|
2271 |
int flags; |
|
2272 |
||
2273 |
flags = MAP_PRIVATE | MAP_NORESERVE | MAP_ANONYMOUS; |
|
2274 |
if (fixed) { |
|
2275 |
assert((uintptr_t)requested_addr % os::Bsd::page_size() == 0, "unaligned address"); |
|
2276 |
flags |= MAP_FIXED; |
|
2277 |
} |
|
2278 |
||
17083 | 2279 |
// Map reserved/uncommitted pages PROT_NONE so we fail early if we |
2280 |
// touch an uncommitted page. Otherwise, the read/write might |
|
2281 |
// succeed if we have enough swap space to back the physical page. |
|
2282 |
addr = (char*)::mmap(requested_addr, bytes, PROT_NONE, |
|
10565 | 2283 |
flags, -1, 0); |
2284 |
||
2285 |
if (addr != MAP_FAILED) { |
|
2286 |
// anon_mmap() should only get called during VM initialization, |
|
2287 |
// don't need lock (actually we can skip locking even it can be called |
|
2288 |
// from multiple threads, because _highest_vm_reserved_address is just a |
|
2289 |
// hint about the upper limit of non-stack memory regions.) |
|
2290 |
if ((address)addr + bytes > _highest_vm_reserved_address) { |
|
2291 |
_highest_vm_reserved_address = (address)addr + bytes; |
|
2292 |
} |
|
2293 |
} |
|
2294 |
||
2295 |
return addr == MAP_FAILED ? NULL : addr; |
|
2296 |
} |
|
2297 |
||
2298 |
// Don't update _highest_vm_reserved_address, because there might be memory |
|
2299 |
// regions above addr + size. If so, releasing a memory region only creates |
|
2300 |
// a hole in the address space, it doesn't help prevent heap-stack collision. |
|
2301 |
// |
|
2302 |
static int anon_munmap(char * addr, size_t size) { |
|
2303 |
return ::munmap(addr, size) == 0; |
|
2304 |
} |
|
2305 |
||
13195 | 2306 |
char* os::pd_reserve_memory(size_t bytes, char* requested_addr, |
10565 | 2307 |
size_t alignment_hint) { |
2308 |
return anon_mmap(requested_addr, bytes, (requested_addr != NULL)); |
|
2309 |
} |
|
2310 |
||
13195 | 2311 |
bool os::pd_release_memory(char* addr, size_t size) { |
10565 | 2312 |
return anon_munmap(addr, size); |
2313 |
} |
|
2314 |
||
2315 |
static bool bsd_mprotect(char* addr, size_t size, int prot) { |
|
2316 |
// Bsd wants the mprotect address argument to be page aligned. |
|
2317 |
char* bottom = (char*)align_size_down((intptr_t)addr, os::Bsd::page_size()); |
|
2318 |
||
2319 |
// According to SUSv3, mprotect() should only be used with mappings |
|
2320 |
// established by mmap(), and mmap() always maps whole pages. Unaligned |
|
2321 |
// 'addr' likely indicates problem in the VM (e.g. trying to change |
|
2322 |
// protection of malloc'ed or statically allocated memory). Check the |
|
2323 |
// caller if you hit this assert. |
|
2324 |
assert(addr == bottom, "sanity check"); |
|
2325 |
||
2326 |
size = align_size_up(pointer_delta(addr, bottom, 1) + size, os::Bsd::page_size()); |
|
2327 |
return ::mprotect(bottom, size, prot) == 0; |
|
2328 |
} |
|
2329 |
||
2330 |
// Set protections specified |
|
2331 |
bool os::protect_memory(char* addr, size_t bytes, ProtType prot, |
|
2332 |
bool is_committed) { |
|
2333 |
unsigned int p = 0; |
|
2334 |
switch (prot) { |
|
2335 |
case MEM_PROT_NONE: p = PROT_NONE; break; |
|
2336 |
case MEM_PROT_READ: p = PROT_READ; break; |
|
2337 |
case MEM_PROT_RW: p = PROT_READ|PROT_WRITE; break; |
|
2338 |
case MEM_PROT_RWX: p = PROT_READ|PROT_WRITE|PROT_EXEC; break; |
|
2339 |
default: |
|
2340 |
ShouldNotReachHere(); |
|
2341 |
} |
|
2342 |
// is_committed is unused. |
|
2343 |
return bsd_mprotect(addr, bytes, p); |
|
2344 |
} |
|
2345 |
||
2346 |
bool os::guard_memory(char* addr, size_t size) { |
|
2347 |
return bsd_mprotect(addr, size, PROT_NONE); |
|
2348 |
} |
|
2349 |
||
2350 |
bool os::unguard_memory(char* addr, size_t size) { |
|
2351 |
return bsd_mprotect(addr, size, PROT_READ|PROT_WRITE); |
|
2352 |
} |
|
2353 |
||
2354 |
bool os::Bsd::hugetlbfs_sanity_check(bool warn, size_t page_size) { |
|
14286 | 2355 |
return false; |
10565 | 2356 |
} |
2357 |
||
2358 |
// Large page support |
|
2359 |
||
2360 |
static size_t _large_page_size = 0; |
|
2361 |
||
2362 |
void os::large_page_init() { |
|
2363 |
} |
|
2364 |
||
2365 |
||
19546
f6b7c9e96ea3
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
19532
diff
changeset
|
2366 |
char* os::reserve_memory_special(size_t bytes, size_t alignment, char* req_addr, bool exec) { |
f6b7c9e96ea3
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
19532
diff
changeset
|
2367 |
fatal("This code is not used or maintained."); |
f6b7c9e96ea3
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
19532
diff
changeset
|
2368 |
|
10565 | 2369 |
// "exec" is passed in but not used. Creating the shared image for |
2370 |
// the code cache doesn't have an SHM_X executable permission to check. |
|
2371 |
assert(UseLargePages && UseSHM, "only for SHM large pages"); |
|
2372 |
||
2373 |
key_t key = IPC_PRIVATE; |
|
2374 |
char *addr; |
|
2375 |
||
2376 |
bool warn_on_failure = UseLargePages && |
|
2377 |
(!FLAG_IS_DEFAULT(UseLargePages) || |
|
2378 |
!FLAG_IS_DEFAULT(LargePageSizeInBytes) |
|
2379 |
); |
|
2380 |
char msg[128]; |
|
2381 |
||
2382 |
// Create a large shared memory region to attach to based on size. |
|
2383 |
// Currently, size is the total size of the heap |
|
2384 |
int shmid = shmget(key, bytes, IPC_CREAT|SHM_R|SHM_W); |
|
2385 |
if (shmid == -1) { |
|
2386 |
// Possible reasons for shmget failure: |
|
2387 |
// 1. shmmax is too small for Java heap. |
|
2388 |
// > check shmmax value: cat /proc/sys/kernel/shmmax |
|
2389 |
// > increase shmmax value: echo "0xffffffff" > /proc/sys/kernel/shmmax |
|
2390 |
// 2. not enough large page memory. |
|
2391 |
// > check available large pages: cat /proc/meminfo |
|
2392 |
// > increase amount of large pages: |
|
2393 |
// echo new_value > /proc/sys/vm/nr_hugepages |
|
2394 |
// Note 1: different Bsd may use different name for this property, |
|
2395 |
// e.g. on Redhat AS-3 it is "hugetlb_pool". |
|
2396 |
// Note 2: it's possible there's enough physical memory available but |
|
2397 |
// they are so fragmented after a long run that they can't |
|
2398 |
// coalesce into large pages. Try to reserve large pages when |
|
2399 |
// the system is still "fresh". |
|
2400 |
if (warn_on_failure) { |
|
2401 |
jio_snprintf(msg, sizeof(msg), "Failed to reserve shared memory (errno = %d).", errno); |
|
2402 |
warning(msg); |
|
2403 |
} |
|
2404 |
return NULL; |
|
2405 |
} |
|
2406 |
||
2407 |
// attach to the region |
|
2408 |
addr = (char*)shmat(shmid, req_addr, 0); |
|
2409 |
int err = errno; |
|
2410 |
||
2411 |
// Remove shmid. If shmat() is successful, the actual shared memory segment |
|
2412 |
// will be deleted when it's detached by shmdt() or when the process |
|
2413 |
// terminates. If shmat() is not successful this will remove the shared |
|
2414 |
// segment immediately. |
|
2415 |
shmctl(shmid, IPC_RMID, NULL); |
|
2416 |
||
2417 |
if ((intptr_t)addr == -1) { |
|
2418 |
if (warn_on_failure) { |
|
2419 |
jio_snprintf(msg, sizeof(msg), "Failed to attach shared memory (errno = %d).", err); |
|
2420 |
warning(msg); |
|
2421 |
} |
|
2422 |
return NULL; |
|
2423 |
} |
|
2424 |
||
15927
f256c20146f4
8008257: NMT: assert(new_rec->is_allocation_record()) failed when running with shared memory option
zgu
parents:
15855
diff
changeset
|
2425 |
// The memory is committed |
18086
f44cf213a775
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
18069
diff
changeset
|
2426 |
MemTracker::record_virtual_memory_reserve_and_commit((address)addr, bytes, mtNone, CALLER_PC); |
15927
f256c20146f4
8008257: NMT: assert(new_rec->is_allocation_record()) failed when running with shared memory option
zgu
parents:
15855
diff
changeset
|
2427 |
|
10565 | 2428 |
return addr; |
2429 |
} |
|
2430 |
||
2431 |
bool os::release_memory_special(char* base, size_t bytes) { |
|
18086
f44cf213a775
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
18069
diff
changeset
|
2432 |
MemTracker::Tracker tkr = MemTracker::get_virtual_memory_release_tracker(); |
10565 | 2433 |
// detaching the SHM segment will also delete it, see reserve_memory_special() |
2434 |
int rslt = shmdt(base); |
|
15927
f256c20146f4
8008257: NMT: assert(new_rec->is_allocation_record()) failed when running with shared memory option
zgu
parents:
15855
diff
changeset
|
2435 |
if (rslt == 0) { |
18086
f44cf213a775
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
18069
diff
changeset
|
2436 |
tkr.record((address)base, bytes); |
15927
f256c20146f4
8008257: NMT: assert(new_rec->is_allocation_record()) failed when running with shared memory option
zgu
parents:
15855
diff
changeset
|
2437 |
return true; |
f256c20146f4
8008257: NMT: assert(new_rec->is_allocation_record()) failed when running with shared memory option
zgu
parents:
15855
diff
changeset
|
2438 |
} else { |
18086
f44cf213a775
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
18069
diff
changeset
|
2439 |
tkr.discard(); |
15927
f256c20146f4
8008257: NMT: assert(new_rec->is_allocation_record()) failed when running with shared memory option
zgu
parents:
15855
diff
changeset
|
2440 |
return false; |
f256c20146f4
8008257: NMT: assert(new_rec->is_allocation_record()) failed when running with shared memory option
zgu
parents:
15855
diff
changeset
|
2441 |
} |
f256c20146f4
8008257: NMT: assert(new_rec->is_allocation_record()) failed when running with shared memory option
zgu
parents:
15855
diff
changeset
|
2442 |
|
10565 | 2443 |
} |
2444 |
||
2445 |
size_t os::large_page_size() { |
|
2446 |
return _large_page_size; |
|
2447 |
} |
|
2448 |
||
2449 |
// HugeTLBFS allows application to commit large page memory on demand; |
|
2450 |
// with SysV SHM the entire memory region must be allocated as shared |
|
2451 |
// memory. |
|
2452 |
bool os::can_commit_large_page_memory() { |
|
2453 |
return UseHugeTLBFS; |
|
2454 |
} |
|
2455 |
||
2456 |
bool os::can_execute_large_page_memory() { |
|
2457 |
return UseHugeTLBFS; |
|
2458 |
} |
|
2459 |
||
2460 |
// Reserve memory at an arbitrary address, only if that area is |
|
2461 |
// available (and not reserved for something else). |
|
2462 |
||
13195 | 2463 |
char* os::pd_attempt_reserve_memory_at(size_t bytes, char* requested_addr) { |
10565 | 2464 |
const int max_tries = 10; |
2465 |
char* base[max_tries]; |
|
2466 |
size_t size[max_tries]; |
|
2467 |
const size_t gap = 0x000000; |
|
2468 |
||
2469 |
// Assert only that the size is a multiple of the page size, since |
|
2470 |
// that's all that mmap requires, and since that's all we really know |
|
2471 |
// about at this low abstraction level. If we need higher alignment, |
|
2472 |
// we can either pass an alignment to this method or verify alignment |
|
2473 |
// in one of the methods further up the call chain. See bug 5044738. |
|
2474 |
assert(bytes % os::vm_page_size() == 0, "reserving unexpected size block"); |
|
2475 |
||
2476 |
// Repeatedly allocate blocks until the block is allocated at the |
|
2477 |
// right spot. Give up after max_tries. Note that reserve_memory() will |
|
2478 |
// automatically update _highest_vm_reserved_address if the call is |
|
2479 |
// successful. The variable tracks the highest memory address every reserved |
|
2480 |
// by JVM. It is used to detect heap-stack collision if running with |
|
2481 |
// fixed-stack BsdThreads. Because here we may attempt to reserve more |
|
2482 |
// space than needed, it could confuse the collision detecting code. To |
|
2483 |
// solve the problem, save current _highest_vm_reserved_address and |
|
2484 |
// calculate the correct value before return. |
|
2485 |
address old_highest = _highest_vm_reserved_address; |
|
2486 |
||
2487 |
// Bsd mmap allows caller to pass an address as hint; give it a try first, |
|
2488 |
// if kernel honors the hint then we can return immediately. |
|
2489 |
char * addr = anon_mmap(requested_addr, bytes, false); |
|
2490 |
if (addr == requested_addr) { |
|
2491 |
return requested_addr; |
|
2492 |
} |
|
2493 |
||
2494 |
if (addr != NULL) { |
|
2495 |
// mmap() is successful but it fails to reserve at the requested address |
|
2496 |
anon_munmap(addr, bytes); |
|
2497 |
} |
|
2498 |
||
2499 |
int i; |
|
2500 |
for (i = 0; i < max_tries; ++i) { |
|
2501 |
base[i] = reserve_memory(bytes); |
|
2502 |
||
2503 |
if (base[i] != NULL) { |
|
2504 |
// Is this the block we wanted? |
|
2505 |
if (base[i] == requested_addr) { |
|
2506 |
size[i] = bytes; |
|
2507 |
break; |
|
2508 |
} |
|
2509 |
||
2510 |
// Does this overlap the block we wanted? Give back the overlapped |
|
2511 |
// parts and try again. |
|
2512 |
||
2513 |
size_t top_overlap = requested_addr + (bytes + gap) - base[i]; |
|
2514 |
if (top_overlap >= 0 && top_overlap < bytes) { |
|
2515 |
unmap_memory(base[i], top_overlap); |
|
2516 |
base[i] += top_overlap; |
|
2517 |
size[i] = bytes - top_overlap; |
|
2518 |
} else { |
|
2519 |
size_t bottom_overlap = base[i] + bytes - requested_addr; |
|
2520 |
if (bottom_overlap >= 0 && bottom_overlap < bytes) { |
|
2521 |
unmap_memory(requested_addr, bottom_overlap); |
|
2522 |
size[i] = bytes - bottom_overlap; |
|
2523 |
} else { |
|
2524 |
size[i] = bytes; |
|
2525 |
} |
|
2526 |
} |
|
2527 |
} |
|
2528 |
} |
|
2529 |
||
2530 |
// Give back the unused reserved pieces. |
|
2531 |
||
2532 |
for (int j = 0; j < i; ++j) { |
|
2533 |
if (base[j] != NULL) { |
|
2534 |
unmap_memory(base[j], size[j]); |
|
2535 |
} |
|
2536 |
} |
|
2537 |
||
2538 |
if (i < max_tries) { |
|
2539 |
_highest_vm_reserved_address = MAX2(old_highest, (address)requested_addr + bytes); |
|
2540 |
return requested_addr; |
|
2541 |
} else { |
|
2542 |
_highest_vm_reserved_address = old_highest; |
|
2543 |
return NULL; |
|
2544 |
} |
|
2545 |
} |
|
2546 |
||
2547 |
size_t os::read(int fd, void *buf, unsigned int nBytes) { |
|
2548 |
RESTARTABLE_RETURN_INT(::read(fd, buf, nBytes)); |
|
2549 |
} |
|
2550 |
||
2551 |
// TODO-FIXME: reconcile Solaris' os::sleep with the bsd variation. |
|
2552 |
// Solaris uses poll(), bsd uses park(). |
|
2553 |
// Poll() is likely a better choice, assuming that Thread.interrupt() |
|
2554 |
// generates a SIGUSRx signal. Note that SIGUSR1 can interfere with |
|
2555 |
// SIGSEGV, see 4355769. |
|
2556 |
||
2557 |
int os::sleep(Thread* thread, jlong millis, bool interruptible) { |
|
2558 |
assert(thread == Thread::current(), "thread consistency check"); |
|
2559 |
||
2560 |
ParkEvent * const slp = thread->_SleepEvent ; |
|
2561 |
slp->reset() ; |
|
2562 |
OrderAccess::fence() ; |
|
2563 |
||
2564 |
if (interruptible) { |
|
2565 |
jlong prevtime = javaTimeNanos(); |
|
2566 |
||
2567 |
for (;;) { |
|
2568 |
if (os::is_interrupted(thread, true)) { |
|
2569 |
return OS_INTRPT; |
|
2570 |
} |
|
2571 |
||
2572 |
jlong newtime = javaTimeNanos(); |
|
2573 |
||
2574 |
if (newtime - prevtime < 0) { |
|
2575 |
// time moving backwards, should only happen if no monotonic clock |
|
2576 |
// not a guarantee() because JVM should not abort on kernel/glibc bugs |
|
2577 |
assert(!Bsd::supports_monotonic_clock(), "time moving backwards"); |
|
2578 |
} else { |
|
11251
e29da6b5622b
7117303: VM uses non-monotonic time source and complains that it is non-monotonic
johnc
parents:
11161
diff
changeset
|
2579 |
millis -= (newtime - prevtime) / NANOSECS_PER_MILLISEC; |
10565 | 2580 |
} |
2581 |
||
2582 |
if(millis <= 0) { |
|
2583 |
return OS_OK; |
|
2584 |
} |
|
2585 |
||
2586 |
prevtime = newtime; |
|
2587 |
||
2588 |
{ |
|
2589 |
assert(thread->is_Java_thread(), "sanity check"); |
|
2590 |
JavaThread *jt = (JavaThread *) thread; |
|
2591 |
ThreadBlockInVM tbivm(jt); |
|
2592 |
OSThreadWaitState osts(jt->osthread(), false /* not Object.wait() */); |
|
2593 |
||
2594 |
jt->set_suspend_equivalent(); |
|
2595 |
// cleared by handle_special_suspend_equivalent_condition() or |
|
2596 |
// java_suspend_self() via check_and_wait_while_suspended() |
|
2597 |
||
2598 |
slp->park(millis); |
|
2599 |
||
2600 |
// were we externally suspended while we were waiting? |
|
2601 |
jt->check_and_wait_while_suspended(); |
|
2602 |
} |
|
2603 |
} |
|
2604 |
} else { |
|
2605 |
OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); |
|
2606 |
jlong prevtime = javaTimeNanos(); |
|
2607 |
||
2608 |
for (;;) { |
|
2609 |
// It'd be nice to avoid the back-to-back javaTimeNanos() calls on |
|
2610 |
// the 1st iteration ... |
|
2611 |
jlong newtime = javaTimeNanos(); |
|
2612 |
||
2613 |
if (newtime - prevtime < 0) { |
|
2614 |
// time moving backwards, should only happen if no monotonic clock |
|
2615 |
// not a guarantee() because JVM should not abort on kernel/glibc bugs |
|
2616 |
assert(!Bsd::supports_monotonic_clock(), "time moving backwards"); |
|
2617 |
} else { |
|
11251
e29da6b5622b
7117303: VM uses non-monotonic time source and complains that it is non-monotonic
johnc
parents:
11161
diff
changeset
|
2618 |
millis -= (newtime - prevtime) / NANOSECS_PER_MILLISEC; |
10565 | 2619 |
} |
2620 |
||
2621 |
if(millis <= 0) break ; |
|
2622 |
||
2623 |
prevtime = newtime; |
|
2624 |
slp->park(millis); |
|
2625 |
} |
|
2626 |
return OS_OK ; |
|
2627 |
} |
|
2628 |
} |
|
2629 |
||
2630 |
int os::naked_sleep() { |
|
2631 |
// %% make the sleep time an integer flag. for now use 1 millisec. |
|
2632 |
return os::sleep(Thread::current(), 1, false); |
|
2633 |
} |
|
2634 |
||
2635 |
// Sleep forever; naked call to OS-specific sleep; use with CAUTION |
|
2636 |
void os::infinite_sleep() { |
|
2637 |
while (true) { // sleep forever ... |
|
2638 |
::sleep(100); // ... 100 seconds at a time |
|
2639 |
} |
|
2640 |
} |
|
2641 |
||
2642 |
// Used to convert frequent JVM_Yield() to nops |
|
2643 |
bool os::dont_yield() { |
|
2644 |
return DontYieldALot; |
|
2645 |
} |
|
2646 |
||
2647 |
void os::yield() { |
|
2648 |
sched_yield(); |
|
2649 |
} |
|
2650 |
||
2651 |
os::YieldResult os::NakedYield() { sched_yield(); return os::YIELD_UNKNOWN ;} |
|
2652 |
||
2653 |
void os::yield_all(int attempts) { |
|
2654 |
// Yields to all threads, including threads with lower priorities |
|
2655 |
// Threads on Bsd are all with same priority. The Solaris style |
|
2656 |
// os::yield_all() with nanosleep(1ms) is not necessary. |
|
2657 |
sched_yield(); |
|
2658 |
} |
|
2659 |
||
2660 |
// Called from the tight loops to possibly influence time-sharing heuristics |
|
2661 |
void os::loop_breaker(int attempts) { |
|
2662 |
os::yield_all(attempts); |
|
2663 |
} |
|
2664 |
||
2665 |
//////////////////////////////////////////////////////////////////////////////// |
|
2666 |
// thread priority support |
|
2667 |
||
2668 |
// Note: Normal Bsd applications are run with SCHED_OTHER policy. SCHED_OTHER |
|
2669 |
// only supports dynamic priority, static priority must be zero. For real-time |
|
2670 |
// applications, Bsd supports SCHED_RR which allows static priority (1-99). |
|
2671 |
// However, for large multi-threaded applications, SCHED_RR is not only slower |
|
2672 |
// than SCHED_OTHER, but also very unstable (my volano tests hang hard 4 out |
|
2673 |
// of 5 runs - Sep 2005). |
|
2674 |
// |
|
2675 |
// The following code actually changes the niceness of kernel-thread/LWP. It |
|
2676 |
// has an assumption that setpriority() only modifies one kernel-thread/LWP, |
|
2677 |
// not the entire user process, and user level threads are 1:1 mapped to kernel |
|
2678 |
// threads. It has always been the case, but could change in the future. For |
|
2679 |
// this reason, the code should not be used as default (ThreadPriorityPolicy=0). |
|
2680 |
// It is only used when ThreadPriorityPolicy=1 and requires root privilege. |
|
2681 |
||
14286 | 2682 |
#if !defined(__APPLE__) |
11601
f359304c1856
7082553: Interpret Thread.setPriority(Thread.MAX_PRIORITY) to mean FX60 on Solaris 10 and 11
phh
parents:
11593
diff
changeset
|
2683 |
int os::java_to_os_priority[CriticalPriority + 1] = { |
10565 | 2684 |
19, // 0 Entry should never be used |
2685 |
||
2686 |
0, // 1 MinPriority |
|
2687 |
3, // 2 |
|
2688 |
6, // 3 |
|
2689 |
||
11601
f359304c1856
7082553: Interpret Thread.setPriority(Thread.MAX_PRIORITY) to mean FX60 on Solaris 10 and 11
phh
parents:
11593
diff
changeset
|
2690 |
10, // 4 |
f359304c1856
7082553: Interpret Thread.setPriority(Thread.MAX_PRIORITY) to mean FX60 on Solaris 10 and 11
phh
parents:
11593
diff
changeset
|
2691 |
15, // 5 NormPriority |
f359304c1856
7082553: Interpret Thread.setPriority(Thread.MAX_PRIORITY) to mean FX60 on Solaris 10 and 11
phh
parents:
11593
diff
changeset
|
2692 |
18, // 6 |
f359304c1856
7082553: Interpret Thread.setPriority(Thread.MAX_PRIORITY) to mean FX60 on Solaris 10 and 11
phh
parents:
11593
diff
changeset
|
2693 |
|
f359304c1856
7082553: Interpret Thread.setPriority(Thread.MAX_PRIORITY) to mean FX60 on Solaris 10 and 11
phh
parents:
11593
diff
changeset
|
2694 |
21, // 7 |
f359304c1856
7082553: Interpret Thread.setPriority(Thread.MAX_PRIORITY) to mean FX60 on Solaris 10 and 11
phh
parents:
11593
diff
changeset
|
2695 |
25, // 8 |
f359304c1856
7082553: Interpret Thread.setPriority(Thread.MAX_PRIORITY) to mean FX60 on Solaris 10 and 11
phh
parents:
11593
diff
changeset
|
2696 |
28, // 9 NearMaxPriority |
f359304c1856
7082553: Interpret Thread.setPriority(Thread.MAX_PRIORITY) to mean FX60 on Solaris 10 and 11
phh
parents:
11593
diff
changeset
|
2697 |
|
f359304c1856
7082553: Interpret Thread.setPriority(Thread.MAX_PRIORITY) to mean FX60 on Solaris 10 and 11
phh
parents:
11593
diff
changeset
|
2698 |
31, // 10 MaxPriority |
f359304c1856
7082553: Interpret Thread.setPriority(Thread.MAX_PRIORITY) to mean FX60 on Solaris 10 and 11
phh
parents:
11593
diff
changeset
|
2699 |
|
f359304c1856
7082553: Interpret Thread.setPriority(Thread.MAX_PRIORITY) to mean FX60 on Solaris 10 and 11
phh
parents:
11593
diff
changeset
|
2700 |
31 // 11 CriticalPriority |
10565 | 2701 |
}; |
14286 | 2702 |
#else |
10565 | 2703 |
/* Using Mach high-level priority assignments */ |
11601
f359304c1856
7082553: Interpret Thread.setPriority(Thread.MAX_PRIORITY) to mean FX60 on Solaris 10 and 11
phh
parents:
11593
diff
changeset
|
2704 |
int os::java_to_os_priority[CriticalPriority + 1] = { |
10565 | 2705 |
0, // 0 Entry should never be used (MINPRI_USER) |
2706 |
||
2707 |
27, // 1 MinPriority |
|
2708 |
28, // 2 |
|
2709 |
29, // 3 |
|
2710 |
||
2711 |
30, // 4 |
|
2712 |
31, // 5 NormPriority (BASEPRI_DEFAULT) |
|
2713 |
32, // 6 |
|
2714 |
||
2715 |
33, // 7 |
|
2716 |
34, // 8 |
|
2717 |
35, // 9 NearMaxPriority |
|
2718 |
||
11601
f359304c1856
7082553: Interpret Thread.setPriority(Thread.MAX_PRIORITY) to mean FX60 on Solaris 10 and 11
phh
parents:
11593
diff
changeset
|
2719 |
36, // 10 MaxPriority |
f359304c1856
7082553: Interpret Thread.setPriority(Thread.MAX_PRIORITY) to mean FX60 on Solaris 10 and 11
phh
parents:
11593
diff
changeset
|
2720 |
|
f359304c1856
7082553: Interpret Thread.setPriority(Thread.MAX_PRIORITY) to mean FX60 on Solaris 10 and 11
phh
parents:
11593
diff
changeset
|
2721 |
36 // 11 CriticalPriority |
10565 | 2722 |
}; |
2723 |
#endif |
|
2724 |
||
2725 |
static int prio_init() { |
|
2726 |
if (ThreadPriorityPolicy == 1) { |
|
2727 |
// Only root can raise thread priority. Don't allow ThreadPriorityPolicy=1 |
|
2728 |
// if effective uid is not root. Perhaps, a more elegant way of doing |
|
2729 |
// this is to test CAP_SYS_NICE capability, but that will require libcap.so |
|
2730 |
if (geteuid() != 0) { |
|
2731 |
if (!FLAG_IS_DEFAULT(ThreadPriorityPolicy)) { |
|
2732 |
warning("-XX:ThreadPriorityPolicy requires root privilege on Bsd"); |
|
2733 |
} |
|
2734 |
ThreadPriorityPolicy = 0; |
|
2735 |
} |
|
2736 |
} |
|
11601
f359304c1856
7082553: Interpret Thread.setPriority(Thread.MAX_PRIORITY) to mean FX60 on Solaris 10 and 11
phh
parents:
11593
diff
changeset
|
2737 |
if (UseCriticalJavaThreadPriority) { |
f359304c1856
7082553: Interpret Thread.setPriority(Thread.MAX_PRIORITY) to mean FX60 on Solaris 10 and 11
phh
parents:
11593
diff
changeset
|
2738 |
os::java_to_os_priority[MaxPriority] = os::java_to_os_priority[CriticalPriority]; |
f359304c1856
7082553: Interpret Thread.setPriority(Thread.MAX_PRIORITY) to mean FX60 on Solaris 10 and 11
phh
parents:
11593
diff
changeset
|
2739 |
} |
10565 | 2740 |
return 0; |
2741 |
} |
|
2742 |
||
2743 |
OSReturn os::set_native_priority(Thread* thread, int newpri) { |
|
2744 |
if ( !UseThreadPriorities || ThreadPriorityPolicy == 0 ) return OS_OK; |
|
2745 |
||
2746 |
#ifdef __OpenBSD__ |
|
2747 |
// OpenBSD pthread_setprio starves low priority threads |
|
2748 |
return OS_OK; |
|
2749 |
#elif defined(__FreeBSD__) |
|
2750 |
int ret = pthread_setprio(thread->osthread()->pthread_id(), newpri); |
|
2751 |
#elif defined(__APPLE__) || defined(__NetBSD__) |
|
2752 |
struct sched_param sp; |
|
2753 |
int policy; |
|
2754 |
pthread_t self = pthread_self(); |
|
2755 |
||
2756 |
if (pthread_getschedparam(self, &policy, &sp) != 0) |
|
2757 |
return OS_ERR; |
|
2758 |
||
2759 |
sp.sched_priority = newpri; |
|
2760 |
if (pthread_setschedparam(self, policy, &sp) != 0) |
|
2761 |
return OS_ERR; |
|
2762 |
||
2763 |
return OS_OK; |
|
2764 |
#else |
|
2765 |
int ret = setpriority(PRIO_PROCESS, thread->osthread()->thread_id(), newpri); |
|
2766 |
return (ret == 0) ? OS_OK : OS_ERR; |
|
2767 |
#endif |
|
2768 |
} |
|
2769 |
||
2770 |
OSReturn os::get_native_priority(const Thread* const thread, int *priority_ptr) { |
|
2771 |
if ( !UseThreadPriorities || ThreadPriorityPolicy == 0 ) { |
|
2772 |
*priority_ptr = java_to_os_priority[NormPriority]; |
|
2773 |
return OS_OK; |
|
2774 |
} |
|
2775 |
||
2776 |
errno = 0; |
|
2777 |
#if defined(__OpenBSD__) || defined(__FreeBSD__) |
|
2778 |
*priority_ptr = pthread_getprio(thread->osthread()->pthread_id()); |
|
2779 |
#elif defined(__APPLE__) || defined(__NetBSD__) |
|
2780 |
int policy; |
|
2781 |
struct sched_param sp; |
|
2782 |
||
2783 |
pthread_getschedparam(pthread_self(), &policy, &sp); |
|
2784 |
*priority_ptr = sp.sched_priority; |
|
2785 |
#else |
|
2786 |
*priority_ptr = getpriority(PRIO_PROCESS, thread->osthread()->thread_id()); |
|
2787 |
#endif |
|
2788 |
return (*priority_ptr != -1 || errno == 0 ? OS_OK : OS_ERR); |
|
2789 |
} |
|
2790 |
||
2791 |
// Hint to the underlying OS that a task switch would not be good. |
|
2792 |
// Void return because it's a hint and can fail. |
|
2793 |
void os::hint_no_preempt() {} |
|
2794 |
||
2795 |
//////////////////////////////////////////////////////////////////////////////// |
|
2796 |
// suspend/resume support |
|
2797 |
||
2798 |
// the low-level signal-based suspend/resume support is a remnant from the |
|
2799 |
// old VM-suspension that used to be for java-suspension, safepoints etc, |
|
2800 |
// within hotspot. Now there is a single use-case for this: |
|
2801 |
// - calling get_thread_pc() on the VMThread by the flat-profiler task |
|
2802 |
// that runs in the watcher thread. |
|
2803 |
// The remaining code is greatly simplified from the more general suspension |
|
2804 |
// code that used to be used. |
|
2805 |
// |
|
2806 |
// The protocol is quite simple: |
|
2807 |
// - suspend: |
|
2808 |
// - sends a signal to the target thread |
|
2809 |
// - polls the suspend state of the osthread using a yield loop |
|
2810 |
// - target thread signal handler (SR_handler) sets suspend state |
|
2811 |
// and blocks in sigsuspend until continued |
|
2812 |
// - resume: |
|
2813 |
// - sets target osthread state to continue |
|
2814 |
// - sends signal to end the sigsuspend loop in the SR_handler |
|
2815 |
// |
|
2816 |
// Note that the SR_lock plays no role in this suspend/resume protocol. |
|
2817 |
// |
|
2818 |
||
2819 |
static void resume_clear_context(OSThread *osthread) { |
|
2820 |
osthread->set_ucontext(NULL); |
|
2821 |
osthread->set_siginfo(NULL); |
|
2822 |
} |
|
2823 |
||
2824 |
static void suspend_save_context(OSThread *osthread, siginfo_t* siginfo, ucontext_t* context) { |
|
2825 |
osthread->set_ucontext(context); |
|
2826 |
osthread->set_siginfo(siginfo); |
|
2827 |
} |
|
2828 |
||
2829 |
// |
|
2830 |
// Handler function invoked when a thread's execution is suspended or |
|
2831 |
// resumed. We have to be careful that only async-safe functions are |
|
2832 |
// called here (Note: most pthread functions are not async safe and |
|
2833 |
// should be avoided.) |
|
2834 |
// |
|
2835 |
// Note: sigwait() is a more natural fit than sigsuspend() from an |
|
2836 |
// interface point of view, but sigwait() prevents the signal hander |
|
2837 |
// from being run. libpthread would get very confused by not having |
|
2838 |
// its signal handlers run and prevents sigwait()'s use with the |
|
2839 |
// mutex granting granting signal. |
|
2840 |
// |
|
18025 | 2841 |
// Currently only ever called on the VMThread or JavaThread |
10565 | 2842 |
// |
2843 |
static void SR_handler(int sig, siginfo_t* siginfo, ucontext_t* context) { |
|
2844 |
// Save and restore errno to avoid confusing native code with EINTR |
|
2845 |
// after sigsuspend. |
|
2846 |
int old_errno = errno; |
|
2847 |
||
2848 |
Thread* thread = Thread::current(); |
|
2849 |
OSThread* osthread = thread->osthread(); |
|
18025 | 2850 |
assert(thread->is_VM_thread() || thread->is_Java_thread(), "Must be VMThread or JavaThread"); |
2851 |
||
2852 |
os::SuspendResume::State current = osthread->sr.state(); |
|
2853 |
if (current == os::SuspendResume::SR_SUSPEND_REQUEST) { |
|
10565 | 2854 |
suspend_save_context(osthread, siginfo, context); |
2855 |
||
18025 | 2856 |
// attempt to switch the state, we assume we had a SUSPEND_REQUEST |
2857 |
os::SuspendResume::State state = osthread->sr.suspended(); |
|
2858 |
if (state == os::SuspendResume::SR_SUSPENDED) { |
|
2859 |
sigset_t suspend_set; // signals for sigsuspend() |
|
2860 |
||
2861 |
// get current set of blocked signals and unblock resume signal |
|
2862 |
pthread_sigmask(SIG_BLOCK, NULL, &suspend_set); |
|
2863 |
sigdelset(&suspend_set, SR_signum); |
|
2864 |
||
2865 |
sr_semaphore.signal(); |
|
2866 |
// wait here until we are resumed |
|
2867 |
while (1) { |
|
2868 |
sigsuspend(&suspend_set); |
|
2869 |
||
2870 |
os::SuspendResume::State result = osthread->sr.running(); |
|
2871 |
if (result == os::SuspendResume::SR_RUNNING) { |
|
2872 |
sr_semaphore.signal(); |
|
2873 |
break; |
|
2874 |
} else if (result != os::SuspendResume::SR_SUSPENDED) { |
|
2875 |
ShouldNotReachHere(); |
|
2876 |
} |
|
2877 |
} |
|
2878 |
||
2879 |
} else if (state == os::SuspendResume::SR_RUNNING) { |
|
2880 |
// request was cancelled, continue |
|
2881 |
} else { |
|
2882 |
ShouldNotReachHere(); |
|
2883 |
} |
|
10565 | 2884 |
|
2885 |
resume_clear_context(osthread); |
|
18025 | 2886 |
} else if (current == os::SuspendResume::SR_RUNNING) { |
2887 |
// request was cancelled, continue |
|
2888 |
} else if (current == os::SuspendResume::SR_WAKEUP_REQUEST) { |
|
2889 |
// ignore |
|
10565 | 2890 |
} else { |
18025 | 2891 |
// ignore |
10565 | 2892 |
} |
2893 |
||
2894 |
errno = old_errno; |
|
2895 |
} |
|
2896 |
||
2897 |
||
2898 |
static int SR_initialize() { |
|
2899 |
struct sigaction act; |
|
2900 |
char *s; |
|
2901 |
/* Get signal number to use for suspend/resume */ |
|
2902 |
if ((s = ::getenv("_JAVA_SR_SIGNUM")) != 0) { |
|
2903 |
int sig = ::strtol(s, 0, 10); |
|
2904 |
if (sig > 0 || sig < NSIG) { |
|
2905 |
SR_signum = sig; |
|
2906 |
} |
|
2907 |
} |
|
2908 |
||
2909 |
assert(SR_signum > SIGSEGV && SR_signum > SIGBUS, |
|
2910 |
"SR_signum must be greater than max(SIGSEGV, SIGBUS), see 4355769"); |
|
2911 |
||
2912 |
sigemptyset(&SR_sigset); |
|
2913 |
sigaddset(&SR_sigset, SR_signum); |
|
2914 |
||
2915 |
/* Set up signal handler for suspend/resume */ |
|
2916 |
act.sa_flags = SA_RESTART|SA_SIGINFO; |
|
2917 |
act.sa_handler = (void (*)(int)) SR_handler; |
|
2918 |
||
2919 |
// SR_signum is blocked by default. |
|
2920 |
// 4528190 - We also need to block pthread restart signal (32 on all |
|
2921 |
// supported Bsd platforms). Note that BsdThreads need to block |
|
2922 |
// this signal for all threads to work properly. So we don't have |
|
2923 |
// to use hard-coded signal number when setting up the mask. |
|
2924 |
pthread_sigmask(SIG_BLOCK, NULL, &act.sa_mask); |
|
2925 |
||
2926 |
if (sigaction(SR_signum, &act, 0) == -1) { |
|
2927 |
return -1; |
|
2928 |
} |
|
2929 |
||
2930 |
// Save signal flag |
|
2931 |
os::Bsd::set_our_sigflags(SR_signum, act.sa_flags); |
|
2932 |
return 0; |
|
2933 |
} |
|
2934 |
||
18025 | 2935 |
static int sr_notify(OSThread* osthread) { |
2936 |
int status = pthread_kill(osthread->pthread_id(), SR_signum); |
|
2937 |
assert_status(status == 0, status, "pthread_kill"); |
|
2938 |
return status; |
|
2939 |
} |
|
2940 |
||
2941 |
// "Randomly" selected value for how long we want to spin |
|
2942 |
// before bailing out on suspending a thread, also how often |
|
2943 |
// we send a signal to a thread we want to resume |
|
2944 |
static const int RANDOMLY_LARGE_INTEGER = 1000000; |
|
2945 |
static const int RANDOMLY_LARGE_INTEGER2 = 100; |
|
10565 | 2946 |
|
2947 |
// returns true on success and false on error - really an error is fatal |
|
2948 |
// but this seems the normal response to library errors |
|
2949 |
static bool do_suspend(OSThread* osthread) { |
|
18025 | 2950 |
assert(osthread->sr.is_running(), "thread should be running"); |
2951 |
assert(!sr_semaphore.trywait(), "semaphore has invalid state"); |
|
2952 |
||
10565 | 2953 |
// mark as suspended and send signal |
18025 | 2954 |
if (osthread->sr.request_suspend() != os::SuspendResume::SR_SUSPEND_REQUEST) { |
2955 |
// failed to switch, state wasn't running? |
|
2956 |
ShouldNotReachHere(); |
|
10565 | 2957 |
return false; |
2958 |
} |
|
18025 | 2959 |
|
2960 |
if (sr_notify(osthread) != 0) { |
|
2961 |
ShouldNotReachHere(); |
|
2962 |
} |
|
2963 |
||
2964 |
// managed to send the signal and switch to SUSPEND_REQUEST, now wait for SUSPENDED |
|
2965 |
while (true) { |
|
2966 |
if (sr_semaphore.timedwait(0, 2 * NANOSECS_PER_MILLISEC)) { |
|
2967 |
break; |
|
2968 |
} else { |
|
2969 |
// timeout |
|
2970 |
os::SuspendResume::State cancelled = osthread->sr.cancel_suspend(); |
|
2971 |
if (cancelled == os::SuspendResume::SR_RUNNING) { |
|
2972 |
return false; |
|
2973 |
} else if (cancelled == os::SuspendResume::SR_SUSPENDED) { |
|
2974 |
// make sure that we consume the signal on the semaphore as well |
|
2975 |
sr_semaphore.wait(); |
|
2976 |
break; |
|
2977 |
} else { |
|
2978 |
ShouldNotReachHere(); |
|
2979 |
return false; |
|
2980 |
} |
|
2981 |
} |
|
2982 |
} |
|
2983 |
||
2984 |
guarantee(osthread->sr.is_suspended(), "Must be suspended"); |
|
2985 |
return true; |
|
10565 | 2986 |
} |
2987 |
||
2988 |
static void do_resume(OSThread* osthread) { |
|
2989 |
assert(osthread->sr.is_suspended(), "thread should be suspended"); |
|
18025 | 2990 |
assert(!sr_semaphore.trywait(), "invalid semaphore state"); |
2991 |
||
2992 |
if (osthread->sr.request_wakeup() != os::SuspendResume::SR_WAKEUP_REQUEST) { |
|
2993 |
// failed to switch to WAKEUP_REQUEST |
|
2994 |
ShouldNotReachHere(); |
|
2995 |
return; |
|
2996 |
} |
|
2997 |
||
2998 |
while (true) { |
|
2999 |
if (sr_notify(osthread) == 0) { |
|
3000 |
if (sr_semaphore.timedwait(0, 2 * NANOSECS_PER_MILLISEC)) { |
|
3001 |
if (osthread->sr.is_running()) { |
|
3002 |
return; |
|
3003 |
} |
|
3004 |
} |
|
3005 |
} else { |
|
3006 |
ShouldNotReachHere(); |
|
10565 | 3007 |
} |
3008 |
} |
|
18025 | 3009 |
|
3010 |
guarantee(osthread->sr.is_running(), "Must be running!"); |
|
10565 | 3011 |
} |
3012 |
||
3013 |
//////////////////////////////////////////////////////////////////////////////// |
|
3014 |
// interrupt support |
|
3015 |
||
3016 |
void os::interrupt(Thread* thread) { |
|
3017 |
assert(Thread::current() == thread || Threads_lock->owned_by_self(), |
|
3018 |
"possibility of dangling Thread pointer"); |
|
3019 |
||
3020 |
OSThread* osthread = thread->osthread(); |
|
3021 |
||
3022 |
if (!osthread->interrupted()) { |
|
3023 |
osthread->set_interrupted(true); |
|
3024 |
// More than one thread can get here with the same value of osthread, |
|
3025 |
// resulting in multiple notifications. We do, however, want the store |
|
3026 |
// to interrupted() to be visible to other threads before we execute unpark(). |
|
3027 |
OrderAccess::fence(); |
|
3028 |
ParkEvent * const slp = thread->_SleepEvent ; |
|
3029 |
if (slp != NULL) slp->unpark() ; |
|
3030 |
} |
|
3031 |
||
3032 |
// For JSR166. Unpark even if interrupt status already was set |
|
3033 |
if (thread->is_Java_thread()) |
|
3034 |
((JavaThread*)thread)->parker()->unpark(); |
|
3035 |
||
3036 |
ParkEvent * ev = thread->_ParkEvent ; |
|
3037 |
if (ev != NULL) ev->unpark() ; |
|
3038 |
||
3039 |
} |
|
3040 |
||
3041 |
bool os::is_interrupted(Thread* thread, bool clear_interrupted) { |
|
3042 |
assert(Thread::current() == thread || Threads_lock->owned_by_self(), |
|
3043 |
"possibility of dangling Thread pointer"); |
|
3044 |
||
3045 |
OSThread* osthread = thread->osthread(); |
|
3046 |
||
3047 |
bool interrupted = osthread->interrupted(); |
|
3048 |
||
3049 |
if (interrupted && clear_interrupted) { |
|
3050 |
osthread->set_interrupted(false); |
|
3051 |
// consider thread->_SleepEvent->reset() ... optional optimization |
|
3052 |
} |
|
3053 |
||
3054 |
return interrupted; |
|
3055 |
} |
|
3056 |
||
3057 |
/////////////////////////////////////////////////////////////////////////////////// |
|
3058 |
// signal handling (except suspend/resume) |
|
3059 |
||
3060 |
// This routine may be used by user applications as a "hook" to catch signals. |
|
3061 |
// The user-defined signal handler must pass unrecognized signals to this |
|
3062 |
// routine, and if it returns true (non-zero), then the signal handler must |
|
3063 |
// return immediately. If the flag "abort_if_unrecognized" is true, then this |
|
3064 |
// routine will never retun false (zero), but instead will execute a VM panic |
|
3065 |
// routine kill the process. |
|
3066 |
// |
|
3067 |
// If this routine returns false, it is OK to call it again. This allows |
|
3068 |
// the user-defined signal handler to perform checks either before or after |
|
3069 |
// the VM performs its own checks. Naturally, the user code would be making |
|
3070 |
// a serious error if it tried to handle an exception (such as a null check |
|
3071 |
// or breakpoint) that the VM was generating for its own correct operation. |
|
3072 |
// |
|
3073 |
// This routine may recognize any of the following kinds of signals: |
|
3074 |
// SIGBUS, SIGSEGV, SIGILL, SIGFPE, SIGQUIT, SIGPIPE, SIGXFSZ, SIGUSR1. |
|
3075 |
// It should be consulted by handlers for any of those signals. |
|
3076 |
// |
|
3077 |
// The caller of this routine must pass in the three arguments supplied |
|
3078 |
// to the function referred to in the "sa_sigaction" (not the "sa_handler") |
|
3079 |
// field of the structure passed to sigaction(). This routine assumes that |
|
3080 |
// the sa_flags field passed to sigaction() includes SA_SIGINFO and SA_RESTART. |
|
3081 |
// |
|
3082 |
// Note that the VM will print warnings if it detects conflicting signal |
|
3083 |
// handlers, unless invoked with the option "-XX:+AllowUserSignalHandlers". |
|
3084 |
// |
|
3085 |
extern "C" JNIEXPORT int |
|
3086 |
JVM_handle_bsd_signal(int signo, siginfo_t* siginfo, |
|
3087 |
void* ucontext, int abort_if_unrecognized); |
|
3088 |
||
3089 |
void signalHandler(int sig, siginfo_t* info, void* uc) { |
|
3090 |
assert(info != NULL && uc != NULL, "it must be old kernel"); |
|
15743
f708934a12e7
6749267: Signal handler should save/restore errno
hseigel
parents:
15593
diff
changeset
|
3091 |
int orig_errno = errno; // Preserve errno value over signal handler. |
10565 | 3092 |
JVM_handle_bsd_signal(sig, info, uc, true); |
15743
f708934a12e7
6749267: Signal handler should save/restore errno
hseigel
parents:
15593
diff
changeset
|
3093 |
errno = orig_errno; |
10565 | 3094 |
} |
3095 |
||
3096 |
||
3097 |
// This boolean allows users to forward their own non-matching signals |
|
3098 |
// to JVM_handle_bsd_signal, harmlessly. |
|
3099 |
bool os::Bsd::signal_handlers_are_installed = false; |
|
3100 |
||
3101 |
// For signal-chaining |
|
3102 |
struct sigaction os::Bsd::sigact[MAXSIGNUM]; |
|
3103 |
unsigned int os::Bsd::sigs = 0; |
|
3104 |
bool os::Bsd::libjsig_is_loaded = false; |
|
3105 |
typedef struct sigaction *(*get_signal_t)(int); |
|
3106 |
get_signal_t os::Bsd::get_signal_action = NULL; |
|
3107 |
||
3108 |
struct sigaction* os::Bsd::get_chained_signal_action(int sig) { |
|
3109 |
struct sigaction *actp = NULL; |
|
3110 |
||
3111 |
if (libjsig_is_loaded) { |
|
3112 |
// Retrieve the old signal handler from libjsig |
|
3113 |
actp = (*get_signal_action)(sig); |
|
3114 |
} |
|
3115 |
if (actp == NULL) { |
|
3116 |
// Retrieve the preinstalled signal handler from jvm |
|
3117 |
actp = get_preinstalled_handler(sig); |
|
3118 |
} |
|
3119 |
||
3120 |
return actp; |
|
3121 |
} |
|
3122 |
||
3123 |
static bool call_chained_handler(struct sigaction *actp, int sig, |
|
3124 |
siginfo_t *siginfo, void *context) { |
|
3125 |
// Call the old signal handler |
|
3126 |
if (actp->sa_handler == SIG_DFL) { |
|
3127 |
// It's more reasonable to let jvm treat it as an unexpected exception |
|
3128 |
// instead of taking the default action. |
|
3129 |
return false; |
|
3130 |
} else if (actp->sa_handler != SIG_IGN) { |
|
3131 |
if ((actp->sa_flags & SA_NODEFER) == 0) { |
|
3132 |
// automaticlly block the signal |
|
3133 |
sigaddset(&(actp->sa_mask), sig); |
|
3134 |
} |
|
3135 |
||
3136 |
sa_handler_t hand; |
|
3137 |
sa_sigaction_t sa; |
|
3138 |
bool siginfo_flag_set = (actp->sa_flags & SA_SIGINFO) != 0; |
|
3139 |
// retrieve the chained handler |
|
3140 |
if (siginfo_flag_set) { |
|
3141 |
sa = actp->sa_sigaction; |
|
3142 |
} else { |
|
3143 |
hand = actp->sa_handler; |
|
3144 |
} |
|
3145 |
||
3146 |
if ((actp->sa_flags & SA_RESETHAND) != 0) { |
|
3147 |
actp->sa_handler = SIG_DFL; |
|
3148 |
} |
|
3149 |
||
3150 |
// try to honor the signal mask |
|
3151 |
sigset_t oset; |
|
3152 |
pthread_sigmask(SIG_SETMASK, &(actp->sa_mask), &oset); |
|
3153 |
||
3154 |
// call into the chained handler |
|
3155 |
if (siginfo_flag_set) { |
|
3156 |
(*sa)(sig, siginfo, context); |
|
3157 |
} else { |
|
3158 |
(*hand)(sig); |
|
3159 |
} |
|
3160 |
||
3161 |
// restore the signal mask |
|
3162 |
pthread_sigmask(SIG_SETMASK, &oset, 0); |
|
3163 |
} |
|
3164 |
// Tell jvm's signal handler the signal is taken care of. |
|
3165 |
return true; |
|
3166 |
} |
|
3167 |
||
3168 |
bool os::Bsd::chained_handler(int sig, siginfo_t* siginfo, void* context) { |
|
3169 |
bool chained = false; |
|
3170 |
// signal-chaining |
|
3171 |
if (UseSignalChaining) { |
|
3172 |
struct sigaction *actp = get_chained_signal_action(sig); |
|
3173 |
if (actp != NULL) { |
|
3174 |
chained = call_chained_handler(actp, sig, siginfo, context); |
|
3175 |
} |
|
3176 |
} |
|
3177 |
return chained; |
|
3178 |
} |
|
3179 |
||
3180 |
struct sigaction* os::Bsd::get_preinstalled_handler(int sig) { |
|
3181 |
if ((( (unsigned int)1 << sig ) & sigs) != 0) { |
|
3182 |
return &sigact[sig]; |
|
3183 |
} |
|
3184 |
return NULL; |
|
3185 |
} |
|
3186 |
||
3187 |
void os::Bsd::save_preinstalled_handler(int sig, struct sigaction& oldAct) { |
|
3188 |
assert(sig > 0 && sig < MAXSIGNUM, "vm signal out of expected range"); |
|
3189 |
sigact[sig] = oldAct; |
|
3190 |
sigs |= (unsigned int)1 << sig; |
|
3191 |
} |
|
3192 |
||
3193 |
// for diagnostic |
|
3194 |
int os::Bsd::sigflags[MAXSIGNUM]; |
|
3195 |
||
3196 |
int os::Bsd::get_our_sigflags(int sig) { |
|
3197 |
assert(sig > 0 && sig < MAXSIGNUM, "vm signal out of expected range"); |
|
3198 |
return sigflags[sig]; |
|
3199 |
} |
|
3200 |
||
3201 |
void os::Bsd::set_our_sigflags(int sig, int flags) { |
|
3202 |
assert(sig > 0 && sig < MAXSIGNUM, "vm signal out of expected range"); |
|
3203 |
sigflags[sig] = flags; |
|
3204 |
} |
|
3205 |
||
3206 |
void os::Bsd::set_signal_handler(int sig, bool set_installed) { |
|
3207 |
// Check for overwrite. |
|
3208 |
struct sigaction oldAct; |
|
3209 |
sigaction(sig, (struct sigaction*)NULL, &oldAct); |
|
3210 |
||
3211 |
void* oldhand = oldAct.sa_sigaction |
|
3212 |
? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) |
|
3213 |
: CAST_FROM_FN_PTR(void*, oldAct.sa_handler); |
|
3214 |
if (oldhand != CAST_FROM_FN_PTR(void*, SIG_DFL) && |
|
3215 |
oldhand != CAST_FROM_FN_PTR(void*, SIG_IGN) && |
|
3216 |
oldhand != CAST_FROM_FN_PTR(void*, (sa_sigaction_t)signalHandler)) { |
|
3217 |
if (AllowUserSignalHandlers || !set_installed) { |
|
3218 |
// Do not overwrite; user takes responsibility to forward to us. |
|
3219 |
return; |
|
3220 |
} else if (UseSignalChaining) { |
|
3221 |
// save the old handler in jvm |
|
3222 |
save_preinstalled_handler(sig, oldAct); |
|
3223 |
// libjsig also interposes the sigaction() call below and saves the |
|
3224 |
// old sigaction on it own. |
|
3225 |
} else { |
|
3226 |
fatal(err_msg("Encountered unexpected pre-existing sigaction handler " |
|
3227 |
"%#lx for signal %d.", (long)oldhand, sig)); |
|
3228 |
} |
|
3229 |
} |
|
3230 |
||
3231 |
struct sigaction sigAct; |
|
3232 |
sigfillset(&(sigAct.sa_mask)); |
|
3233 |
sigAct.sa_handler = SIG_DFL; |
|
3234 |
if (!set_installed) { |
|
3235 |
sigAct.sa_flags = SA_SIGINFO|SA_RESTART; |
|
3236 |
} else { |
|
3237 |
sigAct.sa_sigaction = signalHandler; |
|
3238 |
sigAct.sa_flags = SA_SIGINFO|SA_RESTART; |
|
3239 |
} |
|
17868
262aa770cb1b
8009302: Mac OS X: JVM crash on infinite recursion on Appkit Thread
hseigel
parents:
17134
diff
changeset
|
3240 |
#if __APPLE__ |
262aa770cb1b
8009302: Mac OS X: JVM crash on infinite recursion on Appkit Thread
hseigel
parents:
17134
diff
changeset
|
3241 |
// Needed for main thread as XNU (Mac OS X kernel) will only deliver SIGSEGV |
262aa770cb1b
8009302: Mac OS X: JVM crash on infinite recursion on Appkit Thread
hseigel
parents:
17134
diff
changeset
|
3242 |
// (which starts as SIGBUS) on main thread with faulting address inside "stack+guard pages" |
262aa770cb1b
8009302: Mac OS X: JVM crash on infinite recursion on Appkit Thread
hseigel
parents:
17134
diff
changeset
|
3243 |
// if the signal handler declares it will handle it on alternate stack. |
262aa770cb1b
8009302: Mac OS X: JVM crash on infinite recursion on Appkit Thread
hseigel
parents:
17134
diff
changeset
|
3244 |
// Notice we only declare we will handle it on alt stack, but we are not |
262aa770cb1b
8009302: Mac OS X: JVM crash on infinite recursion on Appkit Thread
hseigel
parents:
17134
diff
changeset
|
3245 |
// actually going to use real alt stack - this is just a workaround. |
262aa770cb1b
8009302: Mac OS X: JVM crash on infinite recursion on Appkit Thread
hseigel
parents:
17134
diff
changeset
|
3246 |
// Please see ux_exception.c, method catch_mach_exception_raise for details |
262aa770cb1b
8009302: Mac OS X: JVM crash on infinite recursion on Appkit Thread
hseigel
parents:
17134
diff
changeset
|
3247 |
// link http://www.opensource.apple.com/source/xnu/xnu-2050.18.24/bsd/uxkern/ux_exception.c |
262aa770cb1b
8009302: Mac OS X: JVM crash on infinite recursion on Appkit Thread
hseigel
parents:
17134
diff
changeset
|
3248 |
if (sig == SIGSEGV) { |
262aa770cb1b
8009302: Mac OS X: JVM crash on infinite recursion on Appkit Thread
hseigel
parents:
17134
diff
changeset
|
3249 |
sigAct.sa_flags |= SA_ONSTACK; |
262aa770cb1b
8009302: Mac OS X: JVM crash on infinite recursion on Appkit Thread
hseigel
parents:
17134
diff
changeset
|
3250 |
} |
262aa770cb1b
8009302: Mac OS X: JVM crash on infinite recursion on Appkit Thread
hseigel
parents:
17134
diff
changeset
|
3251 |
#endif |
262aa770cb1b
8009302: Mac OS X: JVM crash on infinite recursion on Appkit Thread
hseigel
parents:
17134
diff
changeset
|
3252 |
|
10565 | 3253 |
// Save flags, which are set by ours |
3254 |
assert(sig > 0 && sig < MAXSIGNUM, "vm signal out of expected range"); |
|
3255 |
sigflags[sig] = sigAct.sa_flags; |
|
3256 |
||
3257 |
int ret = sigaction(sig, &sigAct, &oldAct); |
|
3258 |
assert(ret == 0, "check"); |
|
3259 |
||
3260 |
void* oldhand2 = oldAct.sa_sigaction |
|
3261 |
? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) |
|
3262 |
: CAST_FROM_FN_PTR(void*, oldAct.sa_handler); |
|
3263 |
assert(oldhand2 == oldhand, "no concurrent signal handler installation"); |
|
3264 |
} |
|
3265 |
||
3266 |
// install signal handlers for signals that HotSpot needs to |
|
3267 |
// handle in order to support Java-level exception handling. |
|
3268 |
||
3269 |
void os::Bsd::install_signal_handlers() { |
|
3270 |
if (!signal_handlers_are_installed) { |
|
3271 |
signal_handlers_are_installed = true; |
|
3272 |
||
3273 |
// signal-chaining |
|
3274 |
typedef void (*signal_setting_t)(); |
|
3275 |
signal_setting_t begin_signal_setting = NULL; |
|
3276 |
signal_setting_t end_signal_setting = NULL; |
|
3277 |
begin_signal_setting = CAST_TO_FN_PTR(signal_setting_t, |
|
3278 |
dlsym(RTLD_DEFAULT, "JVM_begin_signal_setting")); |
|
3279 |
if (begin_signal_setting != NULL) { |
|
3280 |
end_signal_setting = CAST_TO_FN_PTR(signal_setting_t, |
|
3281 |
dlsym(RTLD_DEFAULT, "JVM_end_signal_setting")); |
|
3282 |
get_signal_action = CAST_TO_FN_PTR(get_signal_t, |
|
3283 |
dlsym(RTLD_DEFAULT, "JVM_get_signal_action")); |
|
3284 |
libjsig_is_loaded = true; |
|
3285 |
assert(UseSignalChaining, "should enable signal-chaining"); |
|
3286 |
} |
|
3287 |
if (libjsig_is_loaded) { |
|
3288 |
// Tell libjsig jvm is setting signal handlers |
|
3289 |
(*begin_signal_setting)(); |
|
3290 |
} |
|
3291 |
||
3292 |
set_signal_handler(SIGSEGV, true); |
|
3293 |
set_signal_handler(SIGPIPE, true); |
|
3294 |
set_signal_handler(SIGBUS, true); |
|
3295 |
set_signal_handler(SIGILL, true); |
|
3296 |
set_signal_handler(SIGFPE, true); |
|
3297 |
set_signal_handler(SIGXFSZ, true); |
|
3298 |
||
3299 |
#if defined(__APPLE__) |
|
3300 |
// In Mac OS X 10.4, CrashReporter will write a crash log for all 'fatal' signals, including |
|
3301 |
// signals caught and handled by the JVM. To work around this, we reset the mach task |
|
3302 |
// signal handler that's placed on our process by CrashReporter. This disables |
|
3303 |
// CrashReporter-based reporting. |
|
3304 |
// |
|
3305 |
// This work-around is not necessary for 10.5+, as CrashReporter no longer intercedes |
|
3306 |
// on caught fatal signals. |
|
3307 |
// |
|
3308 |
// Additionally, gdb installs both standard BSD signal handlers, and mach exception |
|
3309 |
// handlers. By replacing the existing task exception handler, we disable gdb's mach |
|
3310 |
// exception handling, while leaving the standard BSD signal handlers functional. |
|
3311 |
kern_return_t kr; |
|
3312 |
kr = task_set_exception_ports(mach_task_self(), |
|
3313 |
EXC_MASK_BAD_ACCESS | EXC_MASK_ARITHMETIC, |
|
3314 |
MACH_PORT_NULL, |
|
3315 |
EXCEPTION_STATE_IDENTITY, |
|
3316 |
MACHINE_THREAD_STATE); |
|
3317 |
||
3318 |
assert(kr == KERN_SUCCESS, "could not set mach task signal handler"); |
|
3319 |
#endif |
|
3320 |
||
3321 |
if (libjsig_is_loaded) { |
|
3322 |
// Tell libjsig jvm finishes setting signal handlers |
|
3323 |
(*end_signal_setting)(); |
|
3324 |
} |
|
3325 |
||
3326 |
// We don't activate signal checker if libjsig is in place, we trust ourselves |
|
3327 |
// and if UserSignalHandler is installed all bets are off |
|
3328 |
if (CheckJNICalls) { |
|
3329 |
if (libjsig_is_loaded) { |
|
19532
6a9f968b7b05
7121403: [TESTBUG] runtime/7051189/Xchecksig.sh fails on 64bit solaris
hseigel
parents:
19531
diff
changeset
|
3330 |
if (PrintJNIResolving) { |
6a9f968b7b05
7121403: [TESTBUG] runtime/7051189/Xchecksig.sh fails on 64bit solaris
hseigel
parents:
19531
diff
changeset
|
3331 |
tty->print_cr("Info: libjsig is activated, all active signal checking is disabled"); |
6a9f968b7b05
7121403: [TESTBUG] runtime/7051189/Xchecksig.sh fails on 64bit solaris
hseigel
parents:
19531
diff
changeset
|
3332 |
} |
10565 | 3333 |
check_signals = false; |
3334 |
} |
|
3335 |
if (AllowUserSignalHandlers) { |
|
19532
6a9f968b7b05
7121403: [TESTBUG] runtime/7051189/Xchecksig.sh fails on 64bit solaris
hseigel
parents:
19531
diff
changeset
|
3336 |
if (PrintJNIResolving) { |
6a9f968b7b05
7121403: [TESTBUG] runtime/7051189/Xchecksig.sh fails on 64bit solaris
hseigel
parents:
19531
diff
changeset
|
3337 |
tty->print_cr("Info: AllowUserSignalHandlers is activated, all active signal checking is disabled"); |
6a9f968b7b05
7121403: [TESTBUG] runtime/7051189/Xchecksig.sh fails on 64bit solaris
hseigel
parents:
19531
diff
changeset
|
3338 |
} |
10565 | 3339 |
check_signals = false; |
3340 |
} |
|
3341 |
} |
|
3342 |
} |
|
3343 |
} |
|
3344 |
||
3345 |
||
3346 |
///// |
|
3347 |
// glibc on Bsd platform uses non-documented flag |
|
3348 |
// to indicate, that some special sort of signal |
|
3349 |
// trampoline is used. |
|
3350 |
// We will never set this flag, and we should |
|
3351 |
// ignore this flag in our diagnostic |
|
3352 |
#ifdef SIGNIFICANT_SIGNAL_MASK |
|
3353 |
#undef SIGNIFICANT_SIGNAL_MASK |
|
3354 |
#endif |
|
3355 |
#define SIGNIFICANT_SIGNAL_MASK (~0x04000000) |
|
3356 |
||
3357 |
static const char* get_signal_handler_name(address handler, |
|
3358 |
char* buf, int buflen) { |
|
3359 |
int offset; |
|
3360 |
bool found = os::dll_address_to_library_name(handler, buf, buflen, &offset); |
|
3361 |
if (found) { |
|
3362 |
// skip directory names |
|
3363 |
const char *p1, *p2; |
|
3364 |
p1 = buf; |
|
3365 |
size_t len = strlen(os::file_separator()); |
|
3366 |
while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len; |
|
3367 |
jio_snprintf(buf, buflen, "%s+0x%x", p1, offset); |
|
3368 |
} else { |
|
3369 |
jio_snprintf(buf, buflen, PTR_FORMAT, handler); |
|
3370 |
} |
|
3371 |
return buf; |
|
3372 |
} |
|
3373 |
||
3374 |
static void print_signal_handler(outputStream* st, int sig, |
|
3375 |
char* buf, size_t buflen) { |
|
3376 |
struct sigaction sa; |
|
3377 |
||
3378 |
sigaction(sig, NULL, &sa); |
|
3379 |
||
3380 |
// See comment for SIGNIFICANT_SIGNAL_MASK define |
|
3381 |
sa.sa_flags &= SIGNIFICANT_SIGNAL_MASK; |
|
3382 |
||
3383 |
st->print("%s: ", os::exception_name(sig, buf, buflen)); |
|
3384 |
||
3385 |
address handler = (sa.sa_flags & SA_SIGINFO) |
|
3386 |
? CAST_FROM_FN_PTR(address, sa.sa_sigaction) |
|
3387 |
: CAST_FROM_FN_PTR(address, sa.sa_handler); |
|
3388 |
||
3389 |
if (handler == CAST_FROM_FN_PTR(address, SIG_DFL)) { |
|
3390 |
st->print("SIG_DFL"); |
|
3391 |
} else if (handler == CAST_FROM_FN_PTR(address, SIG_IGN)) { |
|
3392 |
st->print("SIG_IGN"); |
|
3393 |
} else { |
|
3394 |
st->print("[%s]", get_signal_handler_name(handler, buf, buflen)); |
|
3395 |
} |
|
3396 |
||
3397 |
st->print(", sa_mask[0]=" PTR32_FORMAT, *(uint32_t*)&sa.sa_mask); |
|
3398 |
||
3399 |
address rh = VMError::get_resetted_sighandler(sig); |
|
3400 |
// May be, handler was resetted by VMError? |
|
3401 |
if(rh != NULL) { |
|
3402 |
handler = rh; |
|
3403 |
sa.sa_flags = VMError::get_resetted_sigflags(sig) & SIGNIFICANT_SIGNAL_MASK; |
|
3404 |
} |
|
3405 |
||
3406 |
st->print(", sa_flags=" PTR32_FORMAT, sa.sa_flags); |
|
3407 |
||
3408 |
// Check: is it our handler? |
|
3409 |
if(handler == CAST_FROM_FN_PTR(address, (sa_sigaction_t)signalHandler) || |
|
3410 |
handler == CAST_FROM_FN_PTR(address, (sa_sigaction_t)SR_handler)) { |
|
3411 |
// It is our signal handler |
|
3412 |
// check for flags, reset system-used one! |
|
3413 |
if((int)sa.sa_flags != os::Bsd::get_our_sigflags(sig)) { |
|
3414 |
st->print( |
|
3415 |
", flags was changed from " PTR32_FORMAT ", consider using jsig library", |
|
3416 |
os::Bsd::get_our_sigflags(sig)); |
|
3417 |
} |
|
3418 |
} |
|
3419 |
st->cr(); |
|
3420 |
} |
|
3421 |
||
3422 |
||
3423 |
#define DO_SIGNAL_CHECK(sig) \ |
|
3424 |
if (!sigismember(&check_signal_done, sig)) \ |
|
3425 |
os::Bsd::check_signal_handler(sig) |
|
3426 |
||
3427 |
// This method is a periodic task to check for misbehaving JNI applications |
|
3428 |
// under CheckJNI, we can add any periodic checks here |
|
3429 |
||
3430 |
void os::run_periodic_checks() { |
|
3431 |
||
3432 |
if (check_signals == false) return; |
|
3433 |
||
3434 |
// SEGV and BUS if overridden could potentially prevent |
|
3435 |
// generation of hs*.log in the event of a crash, debugging |
|
3436 |
// such a case can be very challenging, so we absolutely |
|
3437 |
// check the following for a good measure: |
|
3438 |
DO_SIGNAL_CHECK(SIGSEGV); |
|
3439 |
DO_SIGNAL_CHECK(SIGILL); |
|
3440 |
DO_SIGNAL_CHECK(SIGFPE); |
|
3441 |
DO_SIGNAL_CHECK(SIGBUS); |
|
3442 |
DO_SIGNAL_CHECK(SIGPIPE); |
|
3443 |
DO_SIGNAL_CHECK(SIGXFSZ); |
|
3444 |
||
3445 |
||
3446 |
// ReduceSignalUsage allows the user to override these handlers |
|
3447 |
// see comments at the very top and jvm_solaris.h |
|
3448 |
if (!ReduceSignalUsage) { |
|
3449 |
DO_SIGNAL_CHECK(SHUTDOWN1_SIGNAL); |
|
3450 |
DO_SIGNAL_CHECK(SHUTDOWN2_SIGNAL); |
|
3451 |
DO_SIGNAL_CHECK(SHUTDOWN3_SIGNAL); |
|
3452 |
DO_SIGNAL_CHECK(BREAK_SIGNAL); |
|
3453 |
} |
|
3454 |
||
3455 |
DO_SIGNAL_CHECK(SR_signum); |
|
3456 |
DO_SIGNAL_CHECK(INTERRUPT_SIGNAL); |
|
3457 |
} |
|
3458 |
||
3459 |
typedef int (*os_sigaction_t)(int, const struct sigaction *, struct sigaction *); |
|
3460 |
||
3461 |
static os_sigaction_t os_sigaction = NULL; |
|
3462 |
||
3463 |
void os::Bsd::check_signal_handler(int sig) { |
|
3464 |
char buf[O_BUFLEN]; |
|
3465 |
address jvmHandler = NULL; |
|
3466 |
||
3467 |
||
3468 |
struct sigaction act; |
|
3469 |
if (os_sigaction == NULL) { |
|
3470 |
// only trust the default sigaction, in case it has been interposed |
|
3471 |
os_sigaction = (os_sigaction_t)dlsym(RTLD_DEFAULT, "sigaction"); |
|
3472 |
if (os_sigaction == NULL) return; |
|
3473 |
} |
|
3474 |
||
3475 |
os_sigaction(sig, (struct sigaction*)NULL, &act); |
|
3476 |
||
3477 |
||
3478 |
act.sa_flags &= SIGNIFICANT_SIGNAL_MASK; |
|
3479 |
||
3480 |
address thisHandler = (act.sa_flags & SA_SIGINFO) |
|
3481 |
? CAST_FROM_FN_PTR(address, act.sa_sigaction) |
|
3482 |
: CAST_FROM_FN_PTR(address, act.sa_handler) ; |
|
3483 |
||
3484 |
||
3485 |
switch(sig) { |
|
3486 |
case SIGSEGV: |
|
3487 |
case SIGBUS: |
|
3488 |
case SIGFPE: |
|
3489 |
case SIGPIPE: |
|
3490 |
case SIGILL: |
|
3491 |
case SIGXFSZ: |
|
3492 |
jvmHandler = CAST_FROM_FN_PTR(address, (sa_sigaction_t)signalHandler); |
|
3493 |
break; |
|
3494 |
||
3495 |
case SHUTDOWN1_SIGNAL: |
|
3496 |
case SHUTDOWN2_SIGNAL: |
|
3497 |
case SHUTDOWN3_SIGNAL: |
|
3498 |
case BREAK_SIGNAL: |
|
3499 |
jvmHandler = (address)user_handler(); |
|
3500 |
break; |
|
3501 |
||
3502 |
case INTERRUPT_SIGNAL: |
|
3503 |
jvmHandler = CAST_FROM_FN_PTR(address, SIG_DFL); |
|
3504 |
break; |
|
3505 |
||
3506 |
default: |
|
3507 |
if (sig == SR_signum) { |
|
3508 |
jvmHandler = CAST_FROM_FN_PTR(address, (sa_sigaction_t)SR_handler); |
|
3509 |
} else { |
|
3510 |
return; |
|
3511 |
} |
|
3512 |
break; |
|
3513 |
} |
|
3514 |
||
3515 |
if (thisHandler != jvmHandler) { |
|
3516 |
tty->print("Warning: %s handler ", exception_name(sig, buf, O_BUFLEN)); |
|
3517 |
tty->print("expected:%s", get_signal_handler_name(jvmHandler, buf, O_BUFLEN)); |
|
3518 |
tty->print_cr(" found:%s", get_signal_handler_name(thisHandler, buf, O_BUFLEN)); |
|
3519 |
// No need to check this sig any longer |
|
3520 |
sigaddset(&check_signal_done, sig); |
|
3521 |
} else if(os::Bsd::get_our_sigflags(sig) != 0 && (int)act.sa_flags != os::Bsd::get_our_sigflags(sig)) { |
|
3522 |
tty->print("Warning: %s handler flags ", exception_name(sig, buf, O_BUFLEN)); |
|
3523 |
tty->print("expected:" PTR32_FORMAT, os::Bsd::get_our_sigflags(sig)); |
|
3524 |
tty->print_cr(" found:" PTR32_FORMAT, act.sa_flags); |
|
3525 |
// No need to check this sig any longer |
|
3526 |
sigaddset(&check_signal_done, sig); |
|
3527 |
} |
|
3528 |
||
3529 |
// Dump all the signal |
|
3530 |
if (sigismember(&check_signal_done, sig)) { |
|
3531 |
print_signal_handlers(tty, buf, O_BUFLEN); |
|
3532 |
} |
|
3533 |
} |
|
3534 |
||
3535 |
extern void report_error(char* file_name, int line_no, char* title, char* format, ...); |
|
3536 |
||
3537 |
extern bool signal_name(int signo, char* buf, size_t len); |
|
3538 |
||
3539 |
const char* os::exception_name(int exception_code, char* buf, size_t size) { |
|
3540 |
if (0 < exception_code && exception_code <= SIGRTMAX) { |
|
3541 |
// signal |
|
3542 |
if (!signal_name(exception_code, buf, size)) { |
|
3543 |
jio_snprintf(buf, size, "SIG%d", exception_code); |
|
3544 |
} |
|
3545 |
return buf; |
|
3546 |
} else { |
|
3547 |
return NULL; |
|
3548 |
} |
|
3549 |
} |
|
3550 |
||
3551 |
// this is called _before_ the most of global arguments have been parsed |
|
3552 |
void os::init(void) { |
|
3553 |
char dummy; /* used to get a guess on initial stack address */ |
|
3554 |
// first_hrtime = gethrtime(); |
|
3555 |
||
3556 |
// With BsdThreads the JavaMain thread pid (primordial thread) |
|
3557 |
// is different than the pid of the java launcher thread. |
|
3558 |
// So, on Bsd, the launcher thread pid is passed to the VM |
|
3559 |
// via the sun.java.launcher.pid property. |
|
3560 |
// Use this property instead of getpid() if it was correctly passed. |
|
3561 |
// See bug 6351349. |
|
3562 |
pid_t java_launcher_pid = (pid_t) Arguments::sun_java_launcher_pid(); |
|
3563 |
||
3564 |
_initial_pid = (java_launcher_pid > 0) ? java_launcher_pid : getpid(); |
|
3565 |
||
3566 |
clock_tics_per_sec = CLK_TCK; |
|
3567 |
||
3568 |
init_random(1234567); |
|
3569 |
||
3570 |
ThreadCritical::initialize(); |
|
3571 |
||
3572 |
Bsd::set_page_size(getpagesize()); |
|
3573 |
if (Bsd::page_size() == -1) { |
|
3574 |
fatal(err_msg("os_bsd.cpp: os::init: sysconf failed (%s)", |
|
3575 |
strerror(errno))); |
|
3576 |
} |
|
3577 |
init_page_sizes((size_t) Bsd::page_size()); |
|
3578 |
||
3579 |
Bsd::initialize_system_info(); |
|
3580 |
||
3581 |
// main_thread points to the aboriginal thread |
|
3582 |
Bsd::_main_thread = pthread_self(); |
|
3583 |
||
3584 |
Bsd::clock_init(); |
|
3585 |
initial_time_count = os::elapsed_counter(); |
|
3586 |
||
3587 |
#ifdef __APPLE__ |
|
3588 |
// XXXDARWIN |
|
3589 |
// Work around the unaligned VM callbacks in hotspot's |
|
3590 |
// sharedRuntime. The callbacks don't use SSE2 instructions, and work on |
|
3591 |
// Linux, Solaris, and FreeBSD. On Mac OS X, dyld (rightly so) enforces |
|
3592 |
// alignment when doing symbol lookup. To work around this, we force early |
|
3593 |
// binding of all symbols now, thus binding when alignment is known-good. |
|
3594 |
_dyld_bind_fully_image_containing_address((const void *) &os::init); |
|
3595 |
#endif |
|
3596 |
} |
|
3597 |
||
3598 |
// To install functions for atexit system call |
|
3599 |
extern "C" { |
|
3600 |
static void perfMemory_exit_helper() { |
|
3601 |
perfMemory_exit(); |
|
3602 |
} |
|
3603 |
} |
|
3604 |
||
3605 |
// this is called _after_ the global arguments have been parsed |
|
3606 |
jint os::init_2(void) |
|
3607 |
{ |
|
3608 |
// Allocate a single page and mark it as readable for safepoint polling |
|
3609 |
address polling_page = (address) ::mmap(NULL, Bsd::page_size(), PROT_READ, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0); |
|
3610 |
guarantee( polling_page != MAP_FAILED, "os::init_2: failed to allocate polling page" ); |
|
3611 |
||
3612 |
os::set_polling_page( polling_page ); |
|
3613 |
||
3614 |
#ifndef PRODUCT |
|
3615 |
if(Verbose && PrintMiscellaneous) |
|
3616 |
tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n", (intptr_t)polling_page); |
|
3617 |
#endif |
|
3618 |
||
3619 |
if (!UseMembar) { |
|
3620 |
address mem_serialize_page = (address) ::mmap(NULL, Bsd::page_size(), PROT_READ | PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0); |
|
18069
e6d4971c8650
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
18025
diff
changeset
|
3621 |
guarantee( mem_serialize_page != MAP_FAILED, "mmap Failed for memory serialize page"); |
10565 | 3622 |
os::set_memory_serialize_page( mem_serialize_page ); |
3623 |
||
3624 |
#ifndef PRODUCT |
|
3625 |
if(Verbose && PrintMiscellaneous) |
|
3626 |
tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n", (intptr_t)mem_serialize_page); |
|
3627 |
#endif |
|
3628 |
} |
|
3629 |
||
3630 |
// initialize suspend/resume support - must do this before signal_sets_init() |
|
3631 |
if (SR_initialize() != 0) { |
|
3632 |
perror("SR_initialize failed"); |
|
3633 |
return JNI_ERR; |
|
3634 |
} |
|
3635 |
||
3636 |
Bsd::signal_sets_init(); |
|
3637 |
Bsd::install_signal_handlers(); |
|
3638 |
||
3639 |
// Check minimum allowable stack size for thread creation and to initialize |
|
3640 |
// the java system classes, including StackOverflowError - depends on page |
|
3641 |
// size. Add a page for compiler2 recursion in main thread. |
|
3642 |
// Add in 2*BytesPerWord times page size to account for VM stack during |
|
3643 |
// class initialization depending on 32 or 64 bit VM. |
|
3644 |
os::Bsd::min_stack_allowed = MAX2(os::Bsd::min_stack_allowed, |
|
3645 |
(size_t)(StackYellowPages+StackRedPages+StackShadowPages+ |
|
3646 |
2*BytesPerWord COMPILER2_PRESENT(+1)) * Bsd::page_size()); |
|
3647 |
||
3648 |
size_t threadStackSizeInBytes = ThreadStackSize * K; |
|
3649 |
if (threadStackSizeInBytes != 0 && |
|
3650 |
threadStackSizeInBytes < os::Bsd::min_stack_allowed) { |
|
3651 |
tty->print_cr("\nThe stack size specified is too small, " |
|
3652 |
"Specify at least %dk", |
|
3653 |
os::Bsd::min_stack_allowed/ K); |
|
3654 |
return JNI_ERR; |
|
3655 |
} |
|
3656 |
||
3657 |
// Make the stack size a multiple of the page size so that |
|
3658 |
// the yellow/red zones can be guarded. |
|
3659 |
JavaThread::set_stack_size_at_create(round_to(threadStackSizeInBytes, |
|
3660 |
vm_page_size())); |
|
3661 |
||
3662 |
if (MaxFDLimit) { |
|
3663 |
// set the number of file descriptors to max. print out error |
|
3664 |
// if getrlimit/setrlimit fails but continue regardless. |
|
3665 |
struct rlimit nbr_files; |
|
3666 |
int status = getrlimit(RLIMIT_NOFILE, &nbr_files); |
|
3667 |
if (status != 0) { |
|
3668 |
if (PrintMiscellaneous && (Verbose || WizardMode)) |
|
3669 |
perror("os::init_2 getrlimit failed"); |
|
3670 |
} else { |
|
3671 |
nbr_files.rlim_cur = nbr_files.rlim_max; |
|
3672 |
||
3673 |
#ifdef __APPLE__ |
|
3674 |
// Darwin returns RLIM_INFINITY for rlim_max, but fails with EINVAL if |
|
3675 |
// you attempt to use RLIM_INFINITY. As per setrlimit(2), OPEN_MAX must |
|
3676 |
// be used instead |
|
3677 |
nbr_files.rlim_cur = MIN(OPEN_MAX, nbr_files.rlim_cur); |
|
3678 |
#endif |
|
3679 |
||
3680 |
status = setrlimit(RLIMIT_NOFILE, &nbr_files); |
|
3681 |
if (status != 0) { |
|
3682 |
if (PrintMiscellaneous && (Verbose || WizardMode)) |
|
3683 |
perror("os::init_2 setrlimit failed"); |
|
3684 |
} |
|
3685 |
} |
|
3686 |
} |
|
3687 |
||
3688 |
// at-exit methods are called in the reverse order of their registration. |
|
3689 |
// atexit functions are called on return from main or as a result of a |
|
3690 |
// call to exit(3C). There can be only 32 of these functions registered |
|
3691 |
// and atexit() does not set errno. |
|
3692 |
||
3693 |
if (PerfAllowAtExitRegistration) { |
|
3694 |
// only register atexit functions if PerfAllowAtExitRegistration is set. |
|
3695 |
// atexit functions can be delayed until process exit time, which |
|
3696 |
// can be problematic for embedded VM situations. Embedded VMs should |
|
3697 |
// call DestroyJavaVM() to assure that VM resources are released. |
|
3698 |
||
3699 |
// note: perfMemory_exit_helper atexit function may be removed in |
|
3700 |
// the future if the appropriate cleanup code can be added to the |
|
3701 |
// VM_Exit VMOperation's doit method. |
|
3702 |
if (atexit(perfMemory_exit_helper) != 0) { |
|
3703 |
warning("os::init2 atexit(perfMemory_exit_helper) failed"); |
|
3704 |
} |
|
3705 |
} |
|
3706 |
||
3707 |
// initialize thread priority policy |
|
3708 |
prio_init(); |
|
3709 |
||
10739 | 3710 |
#ifdef __APPLE__ |
3711 |
// dynamically link to objective c gc registration |
|
3712 |
void *handleLibObjc = dlopen(OBJC_LIB, RTLD_LAZY); |
|
3713 |
if (handleLibObjc != NULL) { |
|
3714 |
objc_registerThreadWithCollectorFunction = (objc_registerThreadWithCollector_t) dlsym(handleLibObjc, OBJC_GCREGISTER); |
|
3715 |
} |
|
3716 |
#endif |
|
3717 |
||
10565 | 3718 |
return JNI_OK; |
3719 |
} |
|
3720 |
||
3721 |
// this is called at the end of vm_initialization |
|
3722 |
void os::init_3(void) { } |
|
3723 |
||
3724 |
// Mark the polling page as unreadable |
|
3725 |
void os::make_polling_page_unreadable(void) { |
|
3726 |
if( !guard_memory((char*)_polling_page, Bsd::page_size()) ) |
|
3727 |
fatal("Could not disable polling page"); |
|
3728 |
}; |
|
3729 |
||
3730 |
// Mark the polling page as readable |
|
3731 |
void os::make_polling_page_readable(void) { |
|
3732 |
if( !bsd_mprotect((char *)_polling_page, Bsd::page_size(), PROT_READ)) { |
|
3733 |
fatal("Could not enable polling page"); |
|
3734 |
} |
|
3735 |
}; |
|
3736 |
||
3737 |
int os::active_processor_count() { |
|
3738 |
return _processor_count; |
|
3739 |
} |
|
3740 |
||
10739 | 3741 |
void os::set_native_thread_name(const char *name) { |
3742 |
#if defined(__APPLE__) && MAC_OS_X_VERSION_MIN_REQUIRED > MAC_OS_X_VERSION_10_5 |
|
3743 |
// This is only supported in Snow Leopard and beyond |
|
3744 |
if (name != NULL) { |
|
3745 |
// Add a "Java: " prefix to the name |
|
3746 |
char buf[MAXTHREADNAMESIZE]; |
|
3747 |
snprintf(buf, sizeof(buf), "Java: %s", name); |
|
3748 |
pthread_setname_np(buf); |
|
3749 |
} |
|
3750 |
#endif |
|
3751 |
} |
|
3752 |
||
10565 | 3753 |
bool os::distribute_processes(uint length, uint* distribution) { |
3754 |
// Not yet implemented. |
|
3755 |
return false; |
|
3756 |
} |
|
3757 |
||
3758 |
bool os::bind_to_processor(uint processor_id) { |
|
3759 |
// Not yet implemented. |
|
3760 |
return false; |
|
3761 |
} |
|
3762 |
||
18025 | 3763 |
void os::SuspendedThreadTask::internal_do_task() { |
3764 |
if (do_suspend(_thread->osthread())) { |
|
3765 |
SuspendedThreadTaskContext context(_thread, _thread->osthread()->ucontext()); |
|
3766 |
do_task(context); |
|
3767 |
do_resume(_thread->osthread()); |
|
3768 |
} |
|
3769 |
} |
|
3770 |
||
10565 | 3771 |
/// |
18025 | 3772 |
class PcFetcher : public os::SuspendedThreadTask { |
3773 |
public: |
|
3774 |
PcFetcher(Thread* thread) : os::SuspendedThreadTask(thread) {} |
|
3775 |
ExtendedPC result(); |
|
3776 |
protected: |
|
3777 |
void do_task(const os::SuspendedThreadTaskContext& context); |
|
3778 |
private: |
|
3779 |
ExtendedPC _epc; |
|
3780 |
}; |
|
3781 |
||
3782 |
ExtendedPC PcFetcher::result() { |
|
3783 |
guarantee(is_done(), "task is not done yet."); |
|
3784 |
return _epc; |
|
3785 |
} |
|
3786 |
||
3787 |
void PcFetcher::do_task(const os::SuspendedThreadTaskContext& context) { |
|
3788 |
Thread* thread = context.thread(); |
|
3789 |
OSThread* osthread = thread->osthread(); |
|
3790 |
if (osthread->ucontext() != NULL) { |
|
3791 |
_epc = os::Bsd::ucontext_get_pc((ucontext_t *) context.ucontext()); |
|
3792 |
} else { |
|
3793 |
// NULL context is unexpected, double-check this is the VMThread |
|
3794 |
guarantee(thread->is_VM_thread(), "can only be called for VMThread"); |
|
3795 |
} |
|
3796 |
} |
|
10565 | 3797 |
|
3798 |
// Suspends the target using the signal mechanism and then grabs the PC before |
|
3799 |
// resuming the target. Used by the flat-profiler only |
|
3800 |
ExtendedPC os::get_thread_pc(Thread* thread) { |
|
3801 |
// Make sure that it is called by the watcher for the VMThread |
|
3802 |
assert(Thread::current()->is_Watcher_thread(), "Must be watcher"); |
|
3803 |
assert(thread->is_VM_thread(), "Can only be called for VMThread"); |
|
3804 |
||
18025 | 3805 |
PcFetcher fetcher(thread); |
3806 |
fetcher.run(); |
|
3807 |
return fetcher.result(); |
|
10565 | 3808 |
} |
3809 |
||
3810 |
int os::Bsd::safe_cond_timedwait(pthread_cond_t *_cond, pthread_mutex_t *_mutex, const struct timespec *_abstime) |
|
3811 |
{ |
|
3812 |
return pthread_cond_timedwait(_cond, _mutex, _abstime); |
|
3813 |
} |
|
3814 |
||
3815 |
//////////////////////////////////////////////////////////////////////////////// |
|
3816 |
// debug support |
|
3817 |
||
3818 |
bool os::find(address addr, outputStream* st) { |
|
3819 |
Dl_info dlinfo; |
|
3820 |
memset(&dlinfo, 0, sizeof(dlinfo)); |
|
18683
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
3821 |
if (dladdr(addr, &dlinfo) != 0) { |
10565 | 3822 |
st->print(PTR_FORMAT ": ", addr); |
18683
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
3823 |
if (dlinfo.dli_sname != NULL && dlinfo.dli_saddr != NULL) { |
10565 | 3824 |
st->print("%s+%#x", dlinfo.dli_sname, |
3825 |
addr - (intptr_t)dlinfo.dli_saddr); |
|
18683
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
3826 |
} else if (dlinfo.dli_fbase != NULL) { |
10565 | 3827 |
st->print("<offset %#x>", addr - (intptr_t)dlinfo.dli_fbase); |
3828 |
} else { |
|
3829 |
st->print("<absolute address>"); |
|
3830 |
} |
|
18683
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
3831 |
if (dlinfo.dli_fname != NULL) { |
10565 | 3832 |
st->print(" in %s", dlinfo.dli_fname); |
3833 |
} |
|
18683
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
3834 |
if (dlinfo.dli_fbase != NULL) { |
10565 | 3835 |
st->print(" at " PTR_FORMAT, dlinfo.dli_fbase); |
3836 |
} |
|
3837 |
st->cr(); |
|
3838 |
||
3839 |
if (Verbose) { |
|
3840 |
// decode some bytes around the PC |
|
16670
4af09aff4237
8003310: Enable -Wunused-function when compiling with gcc
mikael
parents:
16669
diff
changeset
|
3841 |
address begin = clamp_address_in_page(addr-40, addr, os::vm_page_size()); |
4af09aff4237
8003310: Enable -Wunused-function when compiling with gcc
mikael
parents:
16669
diff
changeset
|
3842 |
address end = clamp_address_in_page(addr+40, addr, os::vm_page_size()); |
10565 | 3843 |
address lowest = (address) dlinfo.dli_sname; |
3844 |
if (!lowest) lowest = (address) dlinfo.dli_fbase; |
|
3845 |
if (begin < lowest) begin = lowest; |
|
3846 |
Dl_info dlinfo2; |
|
18683
a6418e038255
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
18086
diff
changeset
|
3847 |
if (dladdr(end, &dlinfo2) != 0 && dlinfo2.dli_saddr != dlinfo.dli_saddr |
10565 | 3848 |
&& end > dlinfo2.dli_saddr && dlinfo2.dli_saddr > begin) |
3849 |
end = (address) dlinfo2.dli_saddr; |
|
3850 |
Disassembler::decode(begin, end, st); |
|
3851 |
} |
|
3852 |
return true; |
|
3853 |
} |
|
3854 |
return false; |
|
3855 |
} |
|
3856 |
||
3857 |
//////////////////////////////////////////////////////////////////////////////// |
|
3858 |
// misc |
|
3859 |
||
3860 |
// This does not do anything on Bsd. This is basically a hook for being |
|
3861 |
// able to use structured exception handling (thread-local exception filters) |
|
3862 |
// on, e.g., Win32. |
|
3863 |
void |
|
3864 |
os::os_exception_wrapper(java_call_t f, JavaValue* value, methodHandle* method, |
|
3865 |
JavaCallArguments* args, Thread* thread) { |
|
3866 |
f(value, method, args, thread); |
|
3867 |
} |
|
3868 |
||
3869 |
void os::print_statistics() { |
|
3870 |
} |
|
3871 |
||
3872 |
int os::message_box(const char* title, const char* message) { |
|
3873 |
int i; |
|
3874 |
fdStream err(defaultStream::error_fd()); |
|
3875 |
for (i = 0; i < 78; i++) err.print_raw("="); |
|
3876 |
err.cr(); |
|
3877 |
err.print_raw_cr(title); |
|
3878 |
for (i = 0; i < 78; i++) err.print_raw("-"); |
|
3879 |
err.cr(); |
|
3880 |
err.print_raw_cr(message); |
|
3881 |
for (i = 0; i < 78; i++) err.print_raw("="); |
|
3882 |
err.cr(); |
|
3883 |
||
3884 |
char buf[16]; |
|
3885 |
// Prevent process from exiting upon "read error" without consuming all CPU |
|
3886 |
while (::read(0, buf, sizeof(buf)) <= 0) { ::sleep(100); } |
|
3887 |
||
3888 |
return buf[0] == 'y' || buf[0] == 'Y'; |
|
3889 |
} |
|
3890 |
||
3891 |
int os::stat(const char *path, struct stat *sbuf) { |
|
3892 |
char pathbuf[MAX_PATH]; |
|
3893 |
if (strlen(path) > MAX_PATH - 1) { |
|
3894 |
errno = ENAMETOOLONG; |
|
3895 |
return -1; |
|
3896 |
} |
|
3897 |
os::native_path(strcpy(pathbuf, path)); |
|
3898 |
return ::stat(pathbuf, sbuf); |
|
3899 |
} |
|
3900 |
||
3901 |
bool os::check_heap(bool force) { |
|
3902 |
return true; |
|
3903 |
} |
|
3904 |
||
3905 |
int local_vsnprintf(char* buf, size_t count, const char* format, va_list args) { |
|
3906 |
return ::vsnprintf(buf, count, format, args); |
|
3907 |
} |
|
3908 |
||
3909 |
// Is a (classpath) directory empty? |
|
3910 |
bool os::dir_is_empty(const char* path) { |
|
3911 |
DIR *dir = NULL; |
|
3912 |
struct dirent *ptr; |
|
3913 |
||
3914 |
dir = opendir(path); |
|
3915 |
if (dir == NULL) return true; |
|
3916 |
||
3917 |
/* Scan the directory */ |
|
3918 |
bool result = true; |
|
3919 |
char buf[sizeof(struct dirent) + MAX_PATH]; |
|
3920 |
while (result && (ptr = ::readdir(dir)) != NULL) { |
|
3921 |
if (strcmp(ptr->d_name, ".") != 0 && strcmp(ptr->d_name, "..") != 0) { |
|
3922 |
result = false; |
|
3923 |
} |
|
3924 |
} |
|
3925 |
closedir(dir); |
|
3926 |
return result; |
|
3927 |
} |
|
3928 |
||
3929 |
// This code originates from JDK's sysOpen and open64_w |
|
3930 |
// from src/solaris/hpi/src/system_md.c |
|
3931 |
||
3932 |
#ifndef O_DELETE |
|
3933 |
#define O_DELETE 0x10000 |
|
3934 |
#endif |
|
3935 |
||
3936 |
// Open a file. Unlink the file immediately after open returns |
|
3937 |
// if the specified oflag has the O_DELETE flag set. |
|
3938 |
// O_DELETE is used only in j2se/src/share/native/java/util/zip/ZipFile.c |
|
3939 |
||
3940 |
int os::open(const char *path, int oflag, int mode) { |
|
3941 |
||
3942 |
if (strlen(path) > MAX_PATH - 1) { |
|
3943 |
errno = ENAMETOOLONG; |
|
3944 |
return -1; |
|
3945 |
} |
|
3946 |
int fd; |
|
3947 |
int o_delete = (oflag & O_DELETE); |
|
3948 |
oflag = oflag & ~O_DELETE; |
|
3949 |
||
3950 |
fd = ::open(path, oflag, mode); |
|
3951 |
if (fd == -1) return -1; |
|
3952 |
||
3953 |
//If the open succeeded, the file might still be a directory |
|
3954 |
{ |
|
3955 |
struct stat buf; |
|
3956 |
int ret = ::fstat(fd, &buf); |
|
3957 |
int st_mode = buf.st_mode; |
|
3958 |
||
3959 |
if (ret != -1) { |
|
3960 |
if ((st_mode & S_IFMT) == S_IFDIR) { |
|
3961 |
errno = EISDIR; |
|
3962 |
::close(fd); |
|
3963 |
return -1; |
|
3964 |
} |
|
3965 |
} else { |
|
3966 |
::close(fd); |
|
3967 |
return -1; |
|
3968 |
} |
|
3969 |
} |
|
3970 |
||
3971 |
/* |
|
3972 |
* All file descriptors that are opened in the JVM and not |
|
3973 |
* specifically destined for a subprocess should have the |
|
3974 |
* close-on-exec flag set. If we don't set it, then careless 3rd |
|
3975 |
* party native code might fork and exec without closing all |
|
3976 |
* appropriate file descriptors (e.g. as we do in closeDescriptors in |
|
3977 |
* UNIXProcess.c), and this in turn might: |
|
3978 |
* |
|
3979 |
* - cause end-of-file to fail to be detected on some file |
|
3980 |
* descriptors, resulting in mysterious hangs, or |
|
3981 |
* |
|
3982 |
* - might cause an fopen in the subprocess to fail on a system |
|
3983 |
* suffering from bug 1085341. |
|
3984 |
* |
|
3985 |
* (Yes, the default setting of the close-on-exec flag is a Unix |
|
3986 |
* design flaw) |
|
3987 |
* |
|
3988 |
* See: |
|
3989 |
* 1085341: 32-bit stdio routines should support file descriptors >255 |
|
3990 |
* 4843136: (process) pipe file descriptor from Runtime.exec not being closed |
|
3991 |
* 6339493: (process) Runtime.exec does not close all file descriptors on Solaris 9 |
|
3992 |
*/ |
|
3993 |
#ifdef FD_CLOEXEC |
|
3994 |
{ |
|
3995 |
int flags = ::fcntl(fd, F_GETFD); |
|
3996 |
if (flags != -1) |
|
3997 |
::fcntl(fd, F_SETFD, flags | FD_CLOEXEC); |
|
3998 |
} |
|
3999 |
#endif |
|
4000 |
||
4001 |
if (o_delete != 0) { |
|
4002 |
::unlink(path); |
|
4003 |
} |
|
4004 |
return fd; |
|
4005 |
} |
|
4006 |
||
4007 |
||
4008 |
// create binary file, rewriting existing file if required |
|
4009 |
int os::create_binary_file(const char* path, bool rewrite_existing) { |
|
4010 |
int oflags = O_WRONLY | O_CREAT; |
|
4011 |
if (!rewrite_existing) { |
|
4012 |
oflags |= O_EXCL; |
|
4013 |
} |
|
4014 |
return ::open(path, oflags, S_IREAD | S_IWRITE); |
|
4015 |
} |
|
4016 |
||
4017 |
// return current position of file pointer |
|
4018 |
jlong os::current_file_offset(int fd) { |
|
4019 |
return (jlong)::lseek(fd, (off_t)0, SEEK_CUR); |
|
4020 |
} |
|
4021 |
||
4022 |
// move file pointer to the specified offset |
|
4023 |
jlong os::seek_to_file_offset(int fd, jlong offset) { |
|
4024 |
return (jlong)::lseek(fd, (off_t)offset, SEEK_SET); |
|
4025 |
} |
|
4026 |
||
4027 |
// This code originates from JDK's sysAvailable |
|
4028 |
// from src/solaris/hpi/src/native_threads/src/sys_api_td.c |
|
4029 |
||
4030 |
int os::available(int fd, jlong *bytes) { |
|
4031 |
jlong cur, end; |
|
4032 |
int mode; |
|
4033 |
struct stat buf; |
|
4034 |
||
4035 |
if (::fstat(fd, &buf) >= 0) { |
|
4036 |
mode = buf.st_mode; |
|
4037 |
if (S_ISCHR(mode) || S_ISFIFO(mode) || S_ISSOCK(mode)) { |
|
4038 |
/* |
|
4039 |
* XXX: is the following call interruptible? If so, this might |
|
4040 |
* need to go through the INTERRUPT_IO() wrapper as for other |
|
4041 |
* blocking, interruptible calls in this file. |
|
4042 |
*/ |
|
4043 |
int n; |
|
4044 |
if (::ioctl(fd, FIONREAD, &n) >= 0) { |
|
4045 |
*bytes = n; |
|
4046 |
return 1; |
|
4047 |
} |
|
4048 |
} |
|
4049 |
} |
|
4050 |
if ((cur = ::lseek(fd, 0L, SEEK_CUR)) == -1) { |
|
4051 |
return 0; |
|
4052 |
} else if ((end = ::lseek(fd, 0L, SEEK_END)) == -1) { |
|
4053 |
return 0; |
|
4054 |
} else if (::lseek(fd, cur, SEEK_SET) == -1) { |
|
4055 |
return 0; |
|
4056 |
} |
|
4057 |
*bytes = end - cur; |
|
4058 |
return 1; |
|
4059 |
} |
|
4060 |
||
4061 |
int os::socket_available(int fd, jint *pbytes) { |
|
4062 |
if (fd < 0) |
|
4063 |
return OS_OK; |
|
4064 |
||
4065 |
int ret; |
|
4066 |
||
4067 |
RESTARTABLE(::ioctl(fd, FIONREAD, pbytes), ret); |
|
4068 |
||
4069 |
//%% note ioctl can return 0 when successful, JVM_SocketAvailable |
|
4070 |
// is expected to return 0 on failure and 1 on success to the jdk. |
|
4071 |
||
4072 |
return (ret == OS_ERR) ? 0 : 1; |
|
4073 |
} |
|
4074 |
||
4075 |
// Map a block of memory. |
|
13195 | 4076 |
char* os::pd_map_memory(int fd, const char* file_name, size_t file_offset, |
10565 | 4077 |
char *addr, size_t bytes, bool read_only, |
4078 |
bool allow_exec) { |
|
4079 |
int prot; |
|
4080 |
int flags; |
|
4081 |
||
4082 |
if (read_only) { |
|
4083 |
prot = PROT_READ; |
|
4084 |
flags = MAP_SHARED; |
|
4085 |
} else { |
|
4086 |
prot = PROT_READ | PROT_WRITE; |
|
4087 |
flags = MAP_PRIVATE; |
|
4088 |
} |
|
4089 |
||
4090 |
if (allow_exec) { |
|
4091 |
prot |= PROT_EXEC; |
|
4092 |
} |
|
4093 |
||
4094 |
if (addr != NULL) { |
|
4095 |
flags |= MAP_FIXED; |
|
4096 |
} |
|
4097 |
||
4098 |
char* mapped_address = (char*)mmap(addr, (size_t)bytes, prot, flags, |
|
4099 |
fd, file_offset); |
|
4100 |
if (mapped_address == MAP_FAILED) { |
|
4101 |
return NULL; |
|
4102 |
} |
|
4103 |
return mapped_address; |
|
4104 |
} |
|
4105 |
||
4106 |
||
4107 |
// Remap a block of memory. |
|
13195 | 4108 |
char* os::pd_remap_memory(int fd, const char* file_name, size_t file_offset, |
10565 | 4109 |
char *addr, size_t bytes, bool read_only, |
4110 |
bool allow_exec) { |
|
4111 |
// same as map_memory() on this OS |
|
4112 |
return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only, |
|
4113 |
allow_exec); |
|
4114 |
} |
|
4115 |
||
4116 |
||
4117 |
// Unmap a block of memory. |
|
13195 | 4118 |
bool os::pd_unmap_memory(char* addr, size_t bytes) { |
10565 | 4119 |
return munmap(addr, bytes) == 0; |
4120 |
} |
|
4121 |
||
4122 |
// current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool) |
|
4123 |
// are used by JVM M&M and JVMTI to get user+sys or user CPU time |
|
4124 |
// of a thread. |
|
4125 |
// |
|
4126 |
// current_thread_cpu_time() and thread_cpu_time(Thread*) returns |
|
4127 |
// the fast estimate available on the platform. |
|
4128 |
||
4129 |
jlong os::current_thread_cpu_time() { |
|
4130 |
#ifdef __APPLE__ |
|
4131 |
return os::thread_cpu_time(Thread::current(), true /* user + sys */); |
|
15869
6336b792f928
8008559: [parfait] Path through non-void function '_ZN2os15thread_cpu_timeEP6Thread' returns an undefined value
morris
parents:
15743
diff
changeset
|
4132 |
#else |
6336b792f928
8008559: [parfait] Path through non-void function '_ZN2os15thread_cpu_timeEP6Thread' returns an undefined value
morris
parents:
15743
diff
changeset
|
4133 |
Unimplemented(); |
6336b792f928
8008559: [parfait] Path through non-void function '_ZN2os15thread_cpu_timeEP6Thread' returns an undefined value
morris
parents:
15743
diff
changeset
|
4134 |
return 0; |
10565 | 4135 |
#endif |
4136 |
} |
|
4137 |
||
4138 |
jlong os::thread_cpu_time(Thread* thread) { |
|
15869
6336b792f928
8008559: [parfait] Path through non-void function '_ZN2os15thread_cpu_timeEP6Thread' returns an undefined value
morris
parents:
15743
diff
changeset
|
4139 |
#ifdef __APPLE__ |
6336b792f928
8008559: [parfait] Path through non-void function '_ZN2os15thread_cpu_timeEP6Thread' returns an undefined value
morris
parents:
15743
diff
changeset
|
4140 |
return os::thread_cpu_time(thread, true /* user + sys */); |
6336b792f928
8008559: [parfait] Path through non-void function '_ZN2os15thread_cpu_timeEP6Thread' returns an undefined value
morris
parents:
15743
diff
changeset
|
4141 |
#else |
6336b792f928
8008559: [parfait] Path through non-void function '_ZN2os15thread_cpu_timeEP6Thread' returns an undefined value
morris
parents:
15743
diff
changeset
|
4142 |
Unimplemented(); |
6336b792f928
8008559: [parfait] Path through non-void function '_ZN2os15thread_cpu_timeEP6Thread' returns an undefined value
morris
parents:
15743
diff
changeset
|
4143 |
return 0; |
6336b792f928
8008559: [parfait] Path through non-void function '_ZN2os15thread_cpu_timeEP6Thread' returns an undefined value
morris
parents:
15743
diff
changeset
|
4144 |
#endif |
10565 | 4145 |
} |
4146 |
||
4147 |
jlong os::current_thread_cpu_time(bool user_sys_cpu_time) { |
|
4148 |
#ifdef __APPLE__ |
|
4149 |
return os::thread_cpu_time(Thread::current(), user_sys_cpu_time); |
|
15869
6336b792f928
8008559: [parfait] Path through non-void function '_ZN2os15thread_cpu_timeEP6Thread' returns an undefined value
morris
parents:
15743
diff
changeset
|
4150 |
#else |
6336b792f928
8008559: [parfait] Path through non-void function '_ZN2os15thread_cpu_timeEP6Thread' returns an undefined value
morris
parents:
15743
diff
changeset
|
4151 |
Unimplemented(); |
6336b792f928
8008559: [parfait] Path through non-void function '_ZN2os15thread_cpu_timeEP6Thread' returns an undefined value
morris
parents:
15743
diff
changeset
|
4152 |
return 0; |
10565 | 4153 |
#endif |
4154 |
} |
|
4155 |
||
4156 |
jlong os::thread_cpu_time(Thread *thread, bool user_sys_cpu_time) { |
|
4157 |
#ifdef __APPLE__ |
|
4158 |
struct thread_basic_info tinfo; |
|
4159 |
mach_msg_type_number_t tcount = THREAD_INFO_MAX; |
|
4160 |
kern_return_t kr; |
|
11881
9642744ae9a5
7132070: Use a mach_port_t as the OSThread thread_id rather than pthread_t on BSD/OSX
sla
parents:
11880
diff
changeset
|
4161 |
thread_t mach_thread; |
9642744ae9a5
7132070: Use a mach_port_t as the OSThread thread_id rather than pthread_t on BSD/OSX
sla
parents:
11880
diff
changeset
|
4162 |
|
9642744ae9a5
7132070: Use a mach_port_t as the OSThread thread_id rather than pthread_t on BSD/OSX
sla
parents:
11880
diff
changeset
|
4163 |
mach_thread = thread->osthread()->thread_id(); |
10565 | 4164 |
kr = thread_info(mach_thread, THREAD_BASIC_INFO, (thread_info_t)&tinfo, &tcount); |
4165 |
if (kr != KERN_SUCCESS) |
|
4166 |
return -1; |
|
4167 |
||
4168 |
if (user_sys_cpu_time) { |
|
4169 |
jlong nanos; |
|
4170 |
nanos = ((jlong) tinfo.system_time.seconds + tinfo.user_time.seconds) * (jlong)1000000000; |
|
4171 |
nanos += ((jlong) tinfo.system_time.microseconds + (jlong) tinfo.user_time.microseconds) * (jlong)1000; |
|
4172 |
return nanos; |
|
4173 |
} else { |
|
4174 |
return ((jlong)tinfo.user_time.seconds * 1000000000) + ((jlong)tinfo.user_time.microseconds * (jlong)1000); |
|
4175 |
} |
|
15869
6336b792f928
8008559: [parfait] Path through non-void function '_ZN2os15thread_cpu_timeEP6Thread' returns an undefined value
morris
parents:
15743
diff
changeset
|
4176 |
#else |
6336b792f928
8008559: [parfait] Path through non-void function '_ZN2os15thread_cpu_timeEP6Thread' returns an undefined value
morris
parents:
15743
diff
changeset
|
4177 |
Unimplemented(); |
6336b792f928
8008559: [parfait] Path through non-void function '_ZN2os15thread_cpu_timeEP6Thread' returns an undefined value
morris
parents:
15743
diff
changeset
|
4178 |
return 0; |
10565 | 4179 |
#endif |
4180 |
} |
|
4181 |
||
4182 |
||
4183 |
void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { |
|
4184 |
info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits |
|
4185 |
info_ptr->may_skip_backward = false; // elapsed time not wall time |
|
4186 |
info_ptr->may_skip_forward = false; // elapsed time not wall time |
|
4187 |
info_ptr->kind = JVMTI_TIMER_TOTAL_CPU; // user+system time is returned |
|
4188 |
} |
|
4189 |
||
4190 |
void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { |
|
4191 |
info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits |
|
4192 |
info_ptr->may_skip_backward = false; // elapsed time not wall time |
|
4193 |
info_ptr->may_skip_forward = false; // elapsed time not wall time |
|
4194 |
info_ptr->kind = JVMTI_TIMER_TOTAL_CPU; // user+system time is returned |
|
4195 |
} |
|
4196 |
||
4197 |
bool os::is_thread_cpu_time_supported() { |
|
4198 |
#ifdef __APPLE__ |
|
4199 |
return true; |
|
14286 | 4200 |
#else |
10565 | 4201 |
return false; |
4202 |
#endif |
|
4203 |
} |
|
4204 |
||
4205 |
// System loadavg support. Returns -1 if load average cannot be obtained. |
|
4206 |
// Bsd doesn't yet have a (official) notion of processor sets, |
|
4207 |
// so just return the system wide load average. |
|
4208 |
int os::loadavg(double loadavg[], int nelem) { |
|
4209 |
return ::getloadavg(loadavg, nelem); |
|
4210 |
} |
|
4211 |
||
4212 |
void os::pause() { |
|
4213 |
char filename[MAX_PATH]; |
|
4214 |
if (PauseAtStartupFile && PauseAtStartupFile[0]) { |
|
4215 |
jio_snprintf(filename, MAX_PATH, PauseAtStartupFile); |
|
4216 |
} else { |
|
4217 |
jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id()); |
|
4218 |
} |
|
4219 |
||
4220 |
int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666); |
|
4221 |
if (fd != -1) { |
|
4222 |
struct stat buf; |
|
4223 |
::close(fd); |
|
4224 |
while (::stat(filename, &buf) == 0) { |
|
4225 |
(void)::poll(NULL, 0, 100); |
|
4226 |
} |
|
4227 |
} else { |
|
4228 |
jio_fprintf(stderr, |
|
4229 |
"Could not open pause file '%s', continuing immediately.\n", filename); |
|
4230 |
} |
|
4231 |
} |
|
4232 |
||
4233 |
||
4234 |
// Refer to the comments in os_solaris.cpp park-unpark. |
|
4235 |
// |
|
4236 |
// Beware -- Some versions of NPTL embody a flaw where pthread_cond_timedwait() can |
|
4237 |
// hang indefinitely. For instance NPTL 0.60 on 2.4.21-4ELsmp is vulnerable. |
|
4238 |
// For specifics regarding the bug see GLIBC BUGID 261237 : |
|
4239 |
// http://www.mail-archive.com/debian-glibc@lists.debian.org/msg10837.html. |
|
4240 |
// Briefly, pthread_cond_timedwait() calls with an expiry time that's not in the future |
|
4241 |
// will either hang or corrupt the condvar, resulting in subsequent hangs if the condvar |
|
4242 |
// is used. (The simple C test-case provided in the GLIBC bug report manifests the |
|
4243 |
// hang). The JVM is vulernable via sleep(), Object.wait(timo), LockSupport.parkNanos() |
|
4244 |
// and monitorenter when we're using 1-0 locking. All those operations may result in |
|
4245 |
// calls to pthread_cond_timedwait(). Using LD_ASSUME_KERNEL to use an older version |
|
4246 |
// of libpthread avoids the problem, but isn't practical. |
|
4247 |
// |
|
4248 |
// Possible remedies: |
|
4249 |
// |
|
4250 |
// 1. Establish a minimum relative wait time. 50 to 100 msecs seems to work. |
|
4251 |
// This is palliative and probabilistic, however. If the thread is preempted |
|
4252 |
// between the call to compute_abstime() and pthread_cond_timedwait(), more |
|
4253 |
// than the minimum period may have passed, and the abstime may be stale (in the |
|
4254 |
// past) resultin in a hang. Using this technique reduces the odds of a hang |
|
4255 |
// but the JVM is still vulnerable, particularly on heavily loaded systems. |
|
4256 |
// |
|
4257 |
// 2. Modify park-unpark to use per-thread (per ParkEvent) pipe-pairs instead |
|
4258 |
// of the usual flag-condvar-mutex idiom. The write side of the pipe is set |
|
4259 |
// NDELAY. unpark() reduces to write(), park() reduces to read() and park(timo) |
|
4260 |
// reduces to poll()+read(). This works well, but consumes 2 FDs per extant |
|
4261 |
// thread. |
|
4262 |
// |
|
4263 |
// 3. Embargo pthread_cond_timedwait() and implement a native "chron" thread |
|
4264 |
// that manages timeouts. We'd emulate pthread_cond_timedwait() by enqueuing |
|
4265 |
// a timeout request to the chron thread and then blocking via pthread_cond_wait(). |
|
4266 |
// This also works well. In fact it avoids kernel-level scalability impediments |
|
4267 |
// on certain platforms that don't handle lots of active pthread_cond_timedwait() |
|
4268 |
// timers in a graceful fashion. |
|
4269 |
// |
|
4270 |
// 4. When the abstime value is in the past it appears that control returns |
|
4271 |
// correctly from pthread_cond_timedwait(), but the condvar is left corrupt. |
|
4272 |
// Subsequent timedwait/wait calls may hang indefinitely. Given that, we |
|
4273 |
// can avoid the problem by reinitializing the condvar -- by cond_destroy() |
|
4274 |
// followed by cond_init() -- after all calls to pthread_cond_timedwait(). |
|
4275 |
// It may be possible to avoid reinitialization by checking the return |
|
4276 |
// value from pthread_cond_timedwait(). In addition to reinitializing the |
|
4277 |
// condvar we must establish the invariant that cond_signal() is only called |
|
4278 |
// within critical sections protected by the adjunct mutex. This prevents |
|
4279 |
// cond_signal() from "seeing" a condvar that's in the midst of being |
|
4280 |
// reinitialized or that is corrupt. Sadly, this invariant obviates the |
|
4281 |
// desirable signal-after-unlock optimization that avoids futile context switching. |
|
4282 |
// |
|
4283 |
// I'm also concerned that some versions of NTPL might allocate an auxilliary |
|
4284 |
// structure when a condvar is used or initialized. cond_destroy() would |
|
4285 |
// release the helper structure. Our reinitialize-after-timedwait fix |
|
4286 |
// put excessive stress on malloc/free and locks protecting the c-heap. |
|
4287 |
// |
|
4288 |
// We currently use (4). See the WorkAroundNTPLTimedWaitHang flag. |
|
4289 |
// It may be possible to refine (4) by checking the kernel and NTPL verisons |
|
4290 |
// and only enabling the work-around for vulnerable environments. |
|
4291 |
||
4292 |
// utility to compute the abstime argument to timedwait: |
|
4293 |
// millis is the relative timeout time |
|
4294 |
// abstime will be the absolute timeout time |
|
4295 |
// TODO: replace compute_abstime() with unpackTime() |
|
4296 |
||
4297 |
static struct timespec* compute_abstime(struct timespec* abstime, jlong millis) { |
|
4298 |
if (millis < 0) millis = 0; |
|
4299 |
struct timeval now; |
|
4300 |
int status = gettimeofday(&now, NULL); |
|
4301 |
assert(status == 0, "gettimeofday"); |
|
4302 |
jlong seconds = millis / 1000; |
|
4303 |
millis %= 1000; |
|
4304 |
if (seconds > 50000000) { // see man cond_timedwait(3T) |
|
4305 |
seconds = 50000000; |
|
4306 |
} |
|
4307 |
abstime->tv_sec = now.tv_sec + seconds; |
|
4308 |
long usec = now.tv_usec + millis * 1000; |
|
4309 |
if (usec >= 1000000) { |
|
4310 |
abstime->tv_sec += 1; |
|
4311 |
usec -= 1000000; |
|
4312 |
} |
|
4313 |
abstime->tv_nsec = usec * 1000; |
|
4314 |
return abstime; |
|
4315 |
} |
|
4316 |
||
4317 |
||
4318 |
// Test-and-clear _Event, always leaves _Event set to 0, returns immediately. |
|
4319 |
// Conceptually TryPark() should be equivalent to park(0). |
|
4320 |
||
4321 |
int os::PlatformEvent::TryPark() { |
|
4322 |
for (;;) { |
|
4323 |
const int v = _Event ; |
|
4324 |
guarantee ((v == 0) || (v == 1), "invariant") ; |
|
4325 |
if (Atomic::cmpxchg (0, &_Event, v) == v) return v ; |
|
4326 |
} |
|
4327 |
} |
|
4328 |
||
4329 |
void os::PlatformEvent::park() { // AKA "down()" |
|
4330 |
// Invariant: Only the thread associated with the Event/PlatformEvent |
|
4331 |
// may call park(). |
|
4332 |
// TODO: assert that _Assoc != NULL or _Assoc == Self |
|
4333 |
int v ; |
|
4334 |
for (;;) { |
|
4335 |
v = _Event ; |
|
4336 |
if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; |
|
4337 |
} |
|
4338 |
guarantee (v >= 0, "invariant") ; |
|
4339 |
if (v == 0) { |
|
4340 |
// Do this the hard way by blocking ... |
|
4341 |
int status = pthread_mutex_lock(_mutex); |
|
4342 |
assert_status(status == 0, status, "mutex_lock"); |
|
4343 |
guarantee (_nParked == 0, "invariant") ; |
|
4344 |
++ _nParked ; |
|
4345 |
while (_Event < 0) { |
|
4346 |
status = pthread_cond_wait(_cond, _mutex); |
|
4347 |
// for some reason, under 2.7 lwp_cond_wait() may return ETIME ... |
|
4348 |
// Treat this the same as if the wait was interrupted |
|
4349 |
if (status == ETIMEDOUT) { status = EINTR; } |
|
4350 |
assert_status(status == 0 || status == EINTR, status, "cond_wait"); |
|
4351 |
} |
|
4352 |
-- _nParked ; |
|
4353 |
||
4354 |
_Event = 0 ; |
|
4355 |
status = pthread_mutex_unlock(_mutex); |
|
4356 |
assert_status(status == 0, status, "mutex_unlock"); |
|
15234
ff1f01be5fbd
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
15231
diff
changeset
|
4357 |
// Paranoia to ensure our locked and lock-free paths interact |
ff1f01be5fbd
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
15231
diff
changeset
|
4358 |
// correctly with each other. |
ff1f01be5fbd
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
15231
diff
changeset
|
4359 |
OrderAccess::fence(); |
10565 | 4360 |
} |
4361 |
guarantee (_Event >= 0, "invariant") ; |
|
4362 |
} |
|
4363 |
||
4364 |
int os::PlatformEvent::park(jlong millis) { |
|
4365 |
guarantee (_nParked == 0, "invariant") ; |
|
4366 |
||
4367 |
int v ; |
|
4368 |
for (;;) { |
|
4369 |
v = _Event ; |
|
4370 |
if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; |
|
4371 |
} |
|
4372 |
guarantee (v >= 0, "invariant") ; |
|
4373 |
if (v != 0) return OS_OK ; |
|
4374 |
||
4375 |
// We do this the hard way, by blocking the thread. |
|
4376 |
// Consider enforcing a minimum timeout value. |
|
4377 |
struct timespec abst; |
|
4378 |
compute_abstime(&abst, millis); |
|
4379 |
||
4380 |
int ret = OS_TIMEOUT; |
|
4381 |
int status = pthread_mutex_lock(_mutex); |
|
4382 |
assert_status(status == 0, status, "mutex_lock"); |
|
4383 |
guarantee (_nParked == 0, "invariant") ; |
|
4384 |
++_nParked ; |
|
4385 |
||
4386 |
// Object.wait(timo) will return because of |
|
4387 |
// (a) notification |
|
4388 |
// (b) timeout |
|
4389 |
// (c) thread.interrupt |
|
4390 |
// |
|
4391 |
// Thread.interrupt and object.notify{All} both call Event::set. |
|
4392 |
// That is, we treat thread.interrupt as a special case of notification. |
|
4393 |
// The underlying Solaris implementation, cond_timedwait, admits |
|
4394 |
// spurious/premature wakeups, but the JLS/JVM spec prevents the |
|
4395 |
// JVM from making those visible to Java code. As such, we must |
|
4396 |
// filter out spurious wakeups. We assume all ETIME returns are valid. |
|
4397 |
// |
|
4398 |
// TODO: properly differentiate simultaneous notify+interrupt. |
|
4399 |
// In that case, we should propagate the notify to another waiter. |
|
4400 |
||
4401 |
while (_Event < 0) { |
|
4402 |
status = os::Bsd::safe_cond_timedwait(_cond, _mutex, &abst); |
|
4403 |
if (status != 0 && WorkAroundNPTLTimedWaitHang) { |
|
4404 |
pthread_cond_destroy (_cond); |
|
4405 |
pthread_cond_init (_cond, NULL) ; |
|
4406 |
} |
|
4407 |
assert_status(status == 0 || status == EINTR || |
|
4408 |
status == ETIMEDOUT, |
|
4409 |
status, "cond_timedwait"); |
|
4410 |
if (!FilterSpuriousWakeups) break ; // previous semantics |
|
4411 |
if (status == ETIMEDOUT) break ; |
|
4412 |
// We consume and ignore EINTR and spurious wakeups. |
|
4413 |
} |
|
4414 |
--_nParked ; |
|
4415 |
if (_Event >= 0) { |
|
4416 |
ret = OS_OK; |
|
4417 |
} |
|
4418 |
_Event = 0 ; |
|
4419 |
status = pthread_mutex_unlock(_mutex); |
|
4420 |
assert_status(status == 0, status, "mutex_unlock"); |
|
4421 |
assert (_nParked == 0, "invariant") ; |
|
15234
ff1f01be5fbd
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
15231
diff
changeset
|
4422 |
// Paranoia to ensure our locked and lock-free paths interact |
ff1f01be5fbd
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
15231
diff
changeset
|
4423 |
// correctly with each other. |
ff1f01be5fbd
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
15231
diff
changeset
|
4424 |
OrderAccess::fence(); |
10565 | 4425 |
return ret; |
4426 |
} |
|
4427 |
||
4428 |
void os::PlatformEvent::unpark() { |
|
15234
ff1f01be5fbd
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
15231
diff
changeset
|
4429 |
// Transitions for _Event: |
ff1f01be5fbd
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
15231
diff
changeset
|
4430 |
// 0 :=> 1 |
ff1f01be5fbd
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
15231
diff
changeset
|
4431 |
// 1 :=> 1 |
ff1f01be5fbd
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
15231
diff
changeset
|
4432 |
// -1 :=> either 0 or 1; must signal target thread |
ff1f01be5fbd
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
15231
diff
changeset
|
4433 |
// That is, we can safely transition _Event from -1 to either |
ff1f01be5fbd
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
15231
diff
changeset
|
4434 |
// 0 or 1. Forcing 1 is slightly more efficient for back-to-back |
ff1f01be5fbd
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
15231
diff
changeset
|
4435 |
// unpark() calls. |
ff1f01be5fbd
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
15231
diff
changeset
|
4436 |
// See also: "Semaphores in Plan 9" by Mullender & Cox |
ff1f01be5fbd
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
15231
diff
changeset
|
4437 |
// |
ff1f01be5fbd
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
15231
diff
changeset
|
4438 |
// Note: Forcing a transition from "-1" to "1" on an unpark() means |
ff1f01be5fbd
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
15231
diff
changeset
|
4439 |
// that it will take two back-to-back park() calls for the owning |
ff1f01be5fbd
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
15231
diff
changeset
|
4440 |
// thread to block. This has the benefit of forcing a spurious return |
ff1f01be5fbd
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
15231
diff
changeset
|
4441 |
// from the first park() call after an unpark() call which will help |
ff1f01be5fbd
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
15231
diff
changeset
|
4442 |
// shake out uses of park() and unpark() without condition variables. |
ff1f01be5fbd
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
15231
diff
changeset
|
4443 |
|
ff1f01be5fbd
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
15231
diff
changeset
|
4444 |
if (Atomic::xchg(1, &_Event) >= 0) return; |
ff1f01be5fbd
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
15231
diff
changeset
|
4445 |
|
ff1f01be5fbd
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
15231
diff
changeset
|
4446 |
// Wait for the thread associated with the event to vacate |
ff1f01be5fbd
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
15231
diff
changeset
|
4447 |
int status = pthread_mutex_lock(_mutex); |
ff1f01be5fbd
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
15231
diff
changeset
|
4448 |
assert_status(status == 0, status, "mutex_lock"); |
ff1f01be5fbd
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
15231
diff
changeset
|
4449 |
int AnyWaiters = _nParked; |
ff1f01be5fbd
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
15231
diff
changeset
|
4450 |
assert(AnyWaiters == 0 || AnyWaiters == 1, "invariant"); |
ff1f01be5fbd
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
15231
diff
changeset
|
4451 |
if (AnyWaiters != 0 && WorkAroundNPTLTimedWaitHang) { |
ff1f01be5fbd
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
15231
diff
changeset
|
4452 |
AnyWaiters = 0; |
ff1f01be5fbd
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
15231
diff
changeset
|
4453 |
pthread_cond_signal(_cond); |
10565 | 4454 |
} |
15234
ff1f01be5fbd
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
15231
diff
changeset
|
4455 |
status = pthread_mutex_unlock(_mutex); |
ff1f01be5fbd
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
15231
diff
changeset
|
4456 |
assert_status(status == 0, status, "mutex_unlock"); |
ff1f01be5fbd
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
15231
diff
changeset
|
4457 |
if (AnyWaiters != 0) { |
ff1f01be5fbd
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
15231
diff
changeset
|
4458 |
status = pthread_cond_signal(_cond); |
ff1f01be5fbd
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
15231
diff
changeset
|
4459 |
assert_status(status == 0, status, "cond_signal"); |
10565 | 4460 |
} |
4461 |
||
4462 |
// Note that we signal() _after dropping the lock for "immortal" Events. |
|
4463 |
// This is safe and avoids a common class of futile wakeups. In rare |
|
4464 |
// circumstances this can cause a thread to return prematurely from |
|
4465 |
// cond_{timed}wait() but the spurious wakeup is benign and the victim will |
|
4466 |
// simply re-test the condition and re-park itself. |
|
4467 |
} |
|
4468 |
||
4469 |
||
4470 |
// JSR166 |
|
4471 |
// ------------------------------------------------------- |
|
4472 |
||
4473 |
/* |
|
4474 |
* The solaris and bsd implementations of park/unpark are fairly |
|
4475 |
* conservative for now, but can be improved. They currently use a |
|
4476 |
* mutex/condvar pair, plus a a count. |
|
4477 |
* Park decrements count if > 0, else does a condvar wait. Unpark |
|
4478 |
* sets count to 1 and signals condvar. Only one thread ever waits |
|
4479 |
* on the condvar. Contention seen when trying to park implies that someone |
|
4480 |
* is unparking you, so don't wait. And spurious returns are fine, so there |
|
4481 |
* is no need to track notifications. |
|
4482 |
*/ |
|
4483 |
||
4484 |
#define MAX_SECS 100000000 |
|
4485 |
/* |
|
4486 |
* This code is common to bsd and solaris and will be moved to a |
|
4487 |
* common place in dolphin. |
|
4488 |
* |
|
4489 |
* The passed in time value is either a relative time in nanoseconds |
|
4490 |
* or an absolute time in milliseconds. Either way it has to be unpacked |
|
4491 |
* into suitable seconds and nanoseconds components and stored in the |
|
4492 |
* given timespec structure. |
|
4493 |
* Given time is a 64-bit value and the time_t used in the timespec is only |
|
4494 |
* a signed-32-bit value (except on 64-bit Bsd) we have to watch for |
|
4495 |
* overflow if times way in the future are given. Further on Solaris versions |
|
4496 |
* prior to 10 there is a restriction (see cond_timedwait) that the specified |
|
4497 |
* number of seconds, in abstime, is less than current_time + 100,000,000. |
|
4498 |
* As it will be 28 years before "now + 100000000" will overflow we can |
|
4499 |
* ignore overflow and just impose a hard-limit on seconds using the value |
|
4500 |
* of "now + 100,000,000". This places a limit on the timeout of about 3.17 |
|
4501 |
* years from "now". |
|
4502 |
*/ |
|
4503 |
||
4504 |
static void unpackTime(struct timespec* absTime, bool isAbsolute, jlong time) { |
|
4505 |
assert (time > 0, "convertTime"); |
|
4506 |
||
4507 |
struct timeval now; |
|
4508 |
int status = gettimeofday(&now, NULL); |
|
4509 |
assert(status == 0, "gettimeofday"); |
|
4510 |
||
4511 |
time_t max_secs = now.tv_sec + MAX_SECS; |
|
4512 |
||
4513 |
if (isAbsolute) { |
|
4514 |
jlong secs = time / 1000; |
|
4515 |
if (secs > max_secs) { |
|
4516 |
absTime->tv_sec = max_secs; |
|
4517 |
} |
|
4518 |
else { |
|
4519 |
absTime->tv_sec = secs; |
|
4520 |
} |
|
4521 |
absTime->tv_nsec = (time % 1000) * NANOSECS_PER_MILLISEC; |
|
4522 |
} |
|
4523 |
else { |
|
4524 |
jlong secs = time / NANOSECS_PER_SEC; |
|
4525 |
if (secs >= MAX_SECS) { |
|
4526 |
absTime->tv_sec = max_secs; |
|
4527 |
absTime->tv_nsec = 0; |
|
4528 |
} |
|
4529 |
else { |
|
4530 |
absTime->tv_sec = now.tv_sec + secs; |
|
4531 |
absTime->tv_nsec = (time % NANOSECS_PER_SEC) + now.tv_usec*1000; |
|
4532 |
if (absTime->tv_nsec >= NANOSECS_PER_SEC) { |
|
4533 |
absTime->tv_nsec -= NANOSECS_PER_SEC; |
|
4534 |
++absTime->tv_sec; // note: this must be <= max_secs |
|
4535 |
} |
|
4536 |
} |
|
4537 |
} |
|
4538 |
assert(absTime->tv_sec >= 0, "tv_sec < 0"); |
|
4539 |
assert(absTime->tv_sec <= max_secs, "tv_sec > max_secs"); |
|
4540 |
assert(absTime->tv_nsec >= 0, "tv_nsec < 0"); |
|
4541 |
assert(absTime->tv_nsec < NANOSECS_PER_SEC, "tv_nsec >= nanos_per_sec"); |
|
4542 |
} |
|
4543 |
||
4544 |
void Parker::park(bool isAbsolute, jlong time) { |
|
15234
ff1f01be5fbd
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
15231
diff
changeset
|
4545 |
// Ideally we'd do something useful while spinning, such |
ff1f01be5fbd
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
15231
diff
changeset
|
4546 |
// as calling unpackTime(). |
ff1f01be5fbd
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
15231
diff
changeset
|
4547 |
|
10565 | 4548 |
// Optional fast-path check: |
4549 |
// Return immediately if a permit is available. |
|
15234
ff1f01be5fbd
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
15231
diff
changeset
|
4550 |
// We depend on Atomic::xchg() having full barrier semantics |
ff1f01be5fbd
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
15231
diff
changeset
|
4551 |
// since we are doing a lock-free update to _counter. |
ff1f01be5fbd
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
15231
diff
changeset
|
4552 |
if (Atomic::xchg(0, &_counter) > 0) return; |
10565 | 4553 |
|
4554 |
Thread* thread = Thread::current(); |
|
4555 |
assert(thread->is_Java_thread(), "Must be JavaThread"); |
|
4556 |
JavaThread *jt = (JavaThread *)thread; |
|
4557 |
||
4558 |
// Optional optimization -- avoid state transitions if there's an interrupt pending. |
|
4559 |
// Check interrupt before trying to wait |
|
4560 |
if (Thread::is_interrupted(thread, false)) { |
|
4561 |
return; |
|
4562 |
} |
|
4563 |
||
4564 |
// Next, demultiplex/decode time arguments |
|
4565 |
struct timespec absTime; |
|
4566 |
if (time < 0 || (isAbsolute && time == 0) ) { // don't wait at all |
|
4567 |
return; |
|
4568 |
} |
|
4569 |
if (time > 0) { |
|
4570 |
unpackTime(&absTime, isAbsolute, time); |
|
4571 |
} |
|
4572 |
||
4573 |
||
4574 |
// Enter safepoint region |
|
4575 |
// Beware of deadlocks such as 6317397. |
|
4576 |
// The per-thread Parker:: mutex is a classic leaf-lock. |
|
4577 |
// In particular a thread must never block on the Threads_lock while |
|
4578 |
// holding the Parker:: mutex. If safepoints are pending both the |
|
4579 |
// the ThreadBlockInVM() CTOR and DTOR may grab Threads_lock. |
|
4580 |
ThreadBlockInVM tbivm(jt); |
|
4581 |
||
4582 |
// Don't wait if cannot get lock since interference arises from |
|
4583 |
// unblocking. Also. check interrupt before trying wait |
|
4584 |
if (Thread::is_interrupted(thread, false) || pthread_mutex_trylock(_mutex) != 0) { |
|
4585 |
return; |
|
4586 |
} |
|
4587 |
||
4588 |
int status ; |
|
4589 |
if (_counter > 0) { // no wait needed |
|
4590 |
_counter = 0; |
|
4591 |
status = pthread_mutex_unlock(_mutex); |
|
4592 |
assert (status == 0, "invariant") ; |
|
15234
ff1f01be5fbd
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
15231
diff
changeset
|
4593 |
// Paranoia to ensure our locked and lock-free paths interact |
ff1f01be5fbd
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
15231
diff
changeset
|
4594 |
// correctly with each other and Java-level accesses. |
10565 | 4595 |
OrderAccess::fence(); |
4596 |
return; |
|
4597 |
} |
|
4598 |
||
4599 |
#ifdef ASSERT |
|
4600 |
// Don't catch signals while blocked; let the running threads have the signals. |
|
4601 |
// (This allows a debugger to break into the running thread.) |
|
4602 |
sigset_t oldsigs; |
|
4603 |
sigset_t* allowdebug_blocked = os::Bsd::allowdebug_blocked_signals(); |
|
4604 |
pthread_sigmask(SIG_BLOCK, allowdebug_blocked, &oldsigs); |
|
4605 |
#endif |
|
4606 |
||
4607 |
OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); |
|
4608 |
jt->set_suspend_equivalent(); |
|
4609 |
// cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() |
|
4610 |
||
4611 |
if (time == 0) { |
|
4612 |
status = pthread_cond_wait (_cond, _mutex) ; |
|
4613 |
} else { |
|
4614 |
status = os::Bsd::safe_cond_timedwait (_cond, _mutex, &absTime) ; |
|
4615 |
if (status != 0 && WorkAroundNPTLTimedWaitHang) { |
|
4616 |
pthread_cond_destroy (_cond) ; |
|
4617 |
pthread_cond_init (_cond, NULL); |
|
4618 |
} |
|
4619 |
} |
|
4620 |
assert_status(status == 0 || status == EINTR || |
|
4621 |
status == ETIMEDOUT, |
|
4622 |
status, "cond_timedwait"); |
|
4623 |
||
4624 |
#ifdef ASSERT |
|
4625 |
pthread_sigmask(SIG_SETMASK, &oldsigs, NULL); |
|
4626 |
#endif |
|
4627 |
||
4628 |
_counter = 0 ; |
|
4629 |
status = pthread_mutex_unlock(_mutex) ; |
|
4630 |
assert_status(status == 0, status, "invariant") ; |
|
15234
ff1f01be5fbd
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
15231
diff
changeset
|
4631 |
// Paranoia to ensure our locked and lock-free paths interact |
ff1f01be5fbd
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
15231
diff
changeset
|
4632 |
// correctly with each other and Java-level accesses. |
ff1f01be5fbd
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
15231
diff
changeset
|
4633 |
OrderAccess::fence(); |
ff1f01be5fbd
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
15231
diff
changeset
|
4634 |
|
10565 | 4635 |
// If externally suspended while waiting, re-suspend |
4636 |
if (jt->handle_special_suspend_equivalent_condition()) { |
|
4637 |
jt->java_suspend_self(); |
|
4638 |
} |
|
4639 |
} |
|
4640 |
||
4641 |
void Parker::unpark() { |
|
4642 |
int s, status ; |
|
4643 |
status = pthread_mutex_lock(_mutex); |
|
4644 |
assert (status == 0, "invariant") ; |
|
4645 |
s = _counter; |
|
4646 |
_counter = 1; |
|
4647 |
if (s < 1) { |
|
4648 |
if (WorkAroundNPTLTimedWaitHang) { |
|
4649 |
status = pthread_cond_signal (_cond) ; |
|
4650 |
assert (status == 0, "invariant") ; |
|
4651 |
status = pthread_mutex_unlock(_mutex); |
|
4652 |
assert (status == 0, "invariant") ; |
|
4653 |
} else { |
|
4654 |
status = pthread_mutex_unlock(_mutex); |
|
4655 |
assert (status == 0, "invariant") ; |
|
4656 |
status = pthread_cond_signal (_cond) ; |
|
4657 |
assert (status == 0, "invariant") ; |
|
4658 |
} |
|
4659 |
} else { |
|
4660 |
pthread_mutex_unlock(_mutex); |
|
4661 |
assert (status == 0, "invariant") ; |
|
4662 |
} |
|
4663 |
} |
|
4664 |
||
4665 |
||
4666 |
/* Darwin has no "environ" in a dynamic library. */ |
|
4667 |
#ifdef __APPLE__ |
|
4668 |
#include <crt_externs.h> |
|
4669 |
#define environ (*_NSGetEnviron()) |
|
4670 |
#else |
|
4671 |
extern char** environ; |
|
4672 |
#endif |
|
4673 |
||
4674 |
// Run the specified command in a separate process. Return its exit value, |
|
4675 |
// or -1 on failure (e.g. can't fork a new process). |
|
4676 |
// Unlike system(), this function can be called from signal handler. It |
|
4677 |
// doesn't block SIGINT et al. |
|
4678 |
int os::fork_and_exec(char* cmd) { |
|
4679 |
const char * argv[4] = {"sh", "-c", cmd, NULL}; |
|
4680 |
||
4681 |
// fork() in BsdThreads/NPTL is not async-safe. It needs to run |
|
4682 |
// pthread_atfork handlers and reset pthread library. All we need is a |
|
4683 |
// separate process to execve. Make a direct syscall to fork process. |
|
4684 |
// On IA64 there's no fork syscall, we have to use fork() and hope for |
|
4685 |
// the best... |
|
4686 |
pid_t pid = fork(); |
|
4687 |
||
4688 |
if (pid < 0) { |
|
4689 |
// fork failed |
|
4690 |
return -1; |
|
4691 |
||
4692 |
} else if (pid == 0) { |
|
4693 |
// child process |
|
4694 |
||
4695 |
// execve() in BsdThreads will call pthread_kill_other_threads_np() |
|
4696 |
// first to kill every thread on the thread list. Because this list is |
|
4697 |
// not reset by fork() (see notes above), execve() will instead kill |
|
4698 |
// every thread in the parent process. We know this is the only thread |
|
4699 |
// in the new process, so make a system call directly. |
|
4700 |
// IA64 should use normal execve() from glibc to match the glibc fork() |
|
4701 |
// above. |
|
4702 |
execve("/bin/sh", (char* const*)argv, environ); |
|
4703 |
||
4704 |
// execve failed |
|
4705 |
_exit(-1); |
|
4706 |
||
4707 |
} else { |
|
4708 |
// copied from J2SE ..._waitForProcessExit() in UNIXProcess_md.c; we don't |
|
4709 |
// care about the actual exit code, for now. |
|
4710 |
||
4711 |
int status; |
|
4712 |
||
4713 |
// Wait for the child process to exit. This returns immediately if |
|
4714 |
// the child has already exited. */ |
|
4715 |
while (waitpid(pid, &status, 0) < 0) { |
|
4716 |
switch (errno) { |
|
4717 |
case ECHILD: return 0; |
|
4718 |
case EINTR: break; |
|
4719 |
default: return -1; |
|
4720 |
} |
|
4721 |
} |
|
4722 |
||
4723 |
if (WIFEXITED(status)) { |
|
4724 |
// The child exited normally; get its exit code. |
|
4725 |
return WEXITSTATUS(status); |
|
4726 |
} else if (WIFSIGNALED(status)) { |
|
4727 |
// The child exited because of a signal |
|
4728 |
// The best value to return is 0x80 + signal number, |
|
4729 |
// because that is what all Unix shells do, and because |
|
4730 |
// it allows callers to distinguish between process exit and |
|
4731 |
// process death by signal. |
|
4732 |
return 0x80 + WTERMSIG(status); |
|
4733 |
} else { |
|
4734 |
// Unknown exit code; pass it through |
|
4735 |
return status; |
|
4736 |
} |
|
4737 |
} |
|
4738 |
} |
|
4739 |
||
4740 |
// is_headless_jre() |
|
4741 |
// |
|
11161
ec855b5a23c2
7110017: is_headless_jre should be updated to reflect the new location of awt toolkit libraries
dholmes
parents:
10739
diff
changeset
|
4742 |
// Test for the existence of xawt/libmawt.so or libawt_xawt.so |
10565 | 4743 |
// in order to report if we are running in a headless jre |
4744 |
// |
|
11161
ec855b5a23c2
7110017: is_headless_jre should be updated to reflect the new location of awt toolkit libraries
dholmes
parents:
10739
diff
changeset
|
4745 |
// Since JDK8 xawt/libmawt.so was moved into the same directory |
ec855b5a23c2
7110017: is_headless_jre should be updated to reflect the new location of awt toolkit libraries
dholmes
parents:
10739
diff
changeset
|
4746 |
// as libawt.so, and renamed libawt_xawt.so |
ec855b5a23c2
7110017: is_headless_jre should be updated to reflect the new location of awt toolkit libraries
dholmes
parents:
10739
diff
changeset
|
4747 |
// |
10565 | 4748 |
bool os::is_headless_jre() { |
21123 | 4749 |
#ifdef __APPLE__ |
4750 |
// We no longer build headless-only on Mac OS X |
|
4751 |
return false; |
|
4752 |
#else |
|
10565 | 4753 |
struct stat statbuf; |
4754 |
char buf[MAXPATHLEN]; |
|
4755 |
char libmawtpath[MAXPATHLEN]; |
|
10739 | 4756 |
const char *xawtstr = "/xawt/libmawt" JNI_LIB_SUFFIX; |
12101 | 4757 |
const char *new_xawtstr = "/libawt_xawt" JNI_LIB_SUFFIX; |
10565 | 4758 |
char *p; |
4759 |
||
4760 |
// Get path to libjvm.so |
|
4761 |
os::jvm_path(buf, sizeof(buf)); |
|
4762 |
||
4763 |
// Get rid of libjvm.so |
|
4764 |
p = strrchr(buf, '/'); |
|
4765 |
if (p == NULL) return false; |
|
4766 |
else *p = '\0'; |
|
4767 |
||
4768 |
// Get rid of client or server |
|
4769 |
p = strrchr(buf, '/'); |
|
4770 |
if (p == NULL) return false; |
|
4771 |
else *p = '\0'; |
|
4772 |
||
4773 |
// check xawt/libmawt.so |
|
4774 |
strcpy(libmawtpath, buf); |
|
4775 |
strcat(libmawtpath, xawtstr); |
|
4776 |
if (::stat(libmawtpath, &statbuf) == 0) return false; |
|
4777 |
||
11161
ec855b5a23c2
7110017: is_headless_jre should be updated to reflect the new location of awt toolkit libraries
dholmes
parents:
10739
diff
changeset
|
4778 |
// check libawt_xawt.so |
10565 | 4779 |
strcpy(libmawtpath, buf); |
11161
ec855b5a23c2
7110017: is_headless_jre should be updated to reflect the new location of awt toolkit libraries
dholmes
parents:
10739
diff
changeset
|
4780 |
strcat(libmawtpath, new_xawtstr); |
10565 | 4781 |
if (::stat(libmawtpath, &statbuf) == 0) return false; |
4782 |
||
4783 |
return true; |
|
21123 | 4784 |
#endif |
10565 | 4785 |
} |
13198
271c557a7623
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
13195
diff
changeset
|
4786 |
|
271c557a7623
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
13195
diff
changeset
|
4787 |
// Get the default path to the core file |
271c557a7623
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
13195
diff
changeset
|
4788 |
// Returns the length of the string |
271c557a7623
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
13195
diff
changeset
|
4789 |
int os::get_core_path(char* buffer, size_t bufferSize) { |
271c557a7623
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
13195
diff
changeset
|
4790 |
int n = jio_snprintf(buffer, bufferSize, "/cores"); |
271c557a7623
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
13195
diff
changeset
|
4791 |
|
271c557a7623
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
13195
diff
changeset
|
4792 |
// Truncate if theoretical string was longer than bufferSize |
271c557a7623
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
13195
diff
changeset
|
4793 |
n = MIN2(n, (int)bufferSize); |
271c557a7623
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
13195
diff
changeset
|
4794 |
|
271c557a7623
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
13195
diff
changeset
|
4795 |
return n; |
271c557a7623
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
13195
diff
changeset
|
4796 |
} |
18025 | 4797 |
|
19546
f6b7c9e96ea3
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
19532
diff
changeset
|
4798 |
#ifndef PRODUCT |
f6b7c9e96ea3
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
19532
diff
changeset
|
4799 |
void TestReserveMemorySpecial_test() { |
f6b7c9e96ea3
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
19532
diff
changeset
|
4800 |
// No tests available for this platform |
f6b7c9e96ea3
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
19532
diff
changeset
|
4801 |
} |
f6b7c9e96ea3
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
19532
diff
changeset
|
4802 |
#endif |