--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/os/solaris/vm/os_solaris.cpp Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,5784 @@
+/*
+ * Copyright 1997-2007 Sun Microsystems, Inc. All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ */
+
+// do not include precompiled header file
+# include "incls/_os_solaris.cpp.incl"
+
+// put OS-includes here
+# include <dlfcn.h>
+# include <errno.h>
+# include <link.h>
+# include <poll.h>
+# include <pthread.h>
+# include <pwd.h>
+# include <schedctl.h>
+# include <setjmp.h>
+# include <signal.h>
+# include <stdio.h>
+# include <alloca.h>
+# include <sys/filio.h>
+# include <sys/ipc.h>
+# include <sys/lwp.h>
+# include <sys/machelf.h> // for elf Sym structure used by dladdr1
+# include <sys/mman.h>
+# include <sys/processor.h>
+# include <sys/procset.h>
+# include <sys/pset.h>
+# include <sys/resource.h>
+# include <sys/shm.h>
+# include <sys/socket.h>
+# include <sys/stat.h>
+# include <sys/systeminfo.h>
+# include <sys/time.h>
+# include <sys/times.h>
+# include <sys/types.h>
+# include <sys/wait.h>
+# include <sys/utsname.h>
+# include <thread.h>
+# include <unistd.h>
+# include <sys/priocntl.h>
+# include <sys/rtpriocntl.h>
+# include <sys/tspriocntl.h>
+# include <sys/iapriocntl.h>
+# include <sys/loadavg.h>
+# include <string.h>
+
+# define _STRUCTURED_PROC 1 // this gets us the new structured proc interfaces of 5.6 & later
+# include <sys/procfs.h> // see comment in <sys/procfs.h>
+
+#define MAX_PATH (2 * K)
+
+// for timer info max values which include all bits
+#define ALL_64_BITS CONST64(0xFFFFFFFFFFFFFFFF)
+
+#ifdef _GNU_SOURCE
+// See bug #6514594
+extern "C" int madvise(caddr_t, size_t, int);
+extern "C" int memcntl(caddr_t addr, size_t len, int cmd, caddr_t arg,
+ int attr, int mask);
+#endif //_GNU_SOURCE
+
+/*
+ MPSS Changes Start.
+ The JVM binary needs to be built and run on pre-Solaris 9
+ systems, but the constants needed by MPSS are only in Solaris 9
+ header files. They are textually replicated here to allow
+ building on earlier systems. Once building on Solaris 8 is
+ no longer a requirement, these #defines can be replaced by ordinary
+ system .h inclusion.
+
+ In earlier versions of the JDK and Solaris, we used ISM for large pages.
+ But ISM requires shared memory to achieve this and thus has many caveats.
+ MPSS is a fully transparent and is a cleaner way to get large pages.
+ Although we still require keeping ISM for backward compatiblitiy as well as
+ giving the opportunity to use large pages on older systems it is
+ recommended that MPSS be used for Solaris 9 and above.
+
+*/
+
+#ifndef MC_HAT_ADVISE
+
+struct memcntl_mha {
+ uint_t mha_cmd; /* command(s) */
+ uint_t mha_flags;
+ size_t mha_pagesize;
+};
+#define MC_HAT_ADVISE 7 /* advise hat map size */
+#define MHA_MAPSIZE_VA 0x1 /* set preferred page size */
+#define MAP_ALIGN 0x200 /* addr specifies alignment */
+
+#endif
+// MPSS Changes End.
+
+
+// Here are some liblgrp types from sys/lgrp_user.h to be able to
+// compile on older systems without this header file.
+
+#ifndef MADV_ACCESS_LWP
+# define MADV_ACCESS_LWP 7 /* next LWP to access heavily */
+#endif
+#ifndef MADV_ACCESS_MANY
+# define MADV_ACCESS_MANY 8 /* many processes to access heavily */
+#endif
+
+// Some more macros from sys/mman.h that are not present in Solaris 8.
+
+#ifndef MAX_MEMINFO_CNT
+/*
+ * info_req request type definitions for meminfo
+ * request types starting with MEMINFO_V are used for Virtual addresses
+ * and should not be mixed with MEMINFO_PLGRP which is targeted for Physical
+ * addresses
+ */
+# define MEMINFO_SHIFT 16
+# define MEMINFO_MASK (0xFF << MEMINFO_SHIFT)
+# define MEMINFO_VPHYSICAL (0x01 << MEMINFO_SHIFT) /* get physical addr */
+# define MEMINFO_VLGRP (0x02 << MEMINFO_SHIFT) /* get lgroup */
+# define MEMINFO_VPAGESIZE (0x03 << MEMINFO_SHIFT) /* size of phys page */
+# define MEMINFO_VREPLCNT (0x04 << MEMINFO_SHIFT) /* no. of replica */
+# define MEMINFO_VREPL (0x05 << MEMINFO_SHIFT) /* physical replica */
+# define MEMINFO_VREPL_LGRP (0x06 << MEMINFO_SHIFT) /* lgrp of replica */
+# define MEMINFO_PLGRP (0x07 << MEMINFO_SHIFT) /* lgroup for paddr */
+
+/* maximum number of addresses meminfo() can process at a time */
+# define MAX_MEMINFO_CNT 256
+
+/* maximum number of request types */
+# define MAX_MEMINFO_REQ 31
+#endif
+
+// see thr_setprio(3T) for the basis of these numbers
+#define MinimumPriority 0
+#define NormalPriority 64
+#define MaximumPriority 127
+
+// Values for ThreadPriorityPolicy == 1
+int prio_policy1[MaxPriority+1] = { -99999, 0, 16, 32, 48, 64,
+ 80, 96, 112, 124, 127 };
+
+// System parameters used internally
+static clock_t clock_tics_per_sec = 100;
+
+// For diagnostics to print a message once. see run_periodic_checks
+static bool check_addr0_done = false;
+static sigset_t check_signal_done;
+static bool check_signals = true;
+
+address os::Solaris::handler_start; // start pc of thr_sighndlrinfo
+address os::Solaris::handler_end; // end pc of thr_sighndlrinfo
+
+address os::Solaris::_main_stack_base = NULL; // 4352906 workaround
+
+
+// "default" initializers for missing libc APIs
+extern "C" {
+ static int lwp_mutex_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; }
+ static int lwp_mutex_destroy(mutex_t *mx) { return 0; }
+
+ static int lwp_cond_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; }
+ static int lwp_cond_destroy(cond_t *cv) { return 0; }
+}
+
+// "default" initializers for pthread-based synchronization
+extern "C" {
+ static int pthread_mutex_default_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; }
+ static int pthread_cond_default_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; }
+}
+
+// Thread Local Storage
+// This is common to all Solaris platforms so it is defined here,
+// in this common file.
+// The declarations are in the os_cpu threadLS*.hpp files.
+//
+// Static member initialization for TLS
+Thread* ThreadLocalStorage::_get_thread_cache[ThreadLocalStorage::_pd_cache_size] = {NULL};
+
+#ifndef PRODUCT
+#define _PCT(n,d) ((100.0*(double)(n))/(double)(d))
+
+int ThreadLocalStorage::_tcacheHit = 0;
+int ThreadLocalStorage::_tcacheMiss = 0;
+
+void ThreadLocalStorage::print_statistics() {
+ int total = _tcacheMiss+_tcacheHit;
+ tty->print_cr("Thread cache hits %d misses %d total %d percent %f\n",
+ _tcacheHit, _tcacheMiss, total, _PCT(_tcacheHit, total));
+}
+#undef _PCT
+#endif // PRODUCT
+
+Thread* ThreadLocalStorage::get_thread_via_cache_slowly(uintptr_t raw_id,
+ int index) {
+ Thread *thread = get_thread_slow();
+ if (thread != NULL) {
+ address sp = os::current_stack_pointer();
+ guarantee(thread->_stack_base == NULL ||
+ (sp <= thread->_stack_base &&
+ sp >= thread->_stack_base - thread->_stack_size) ||
+ is_error_reported(),
+ "sp must be inside of selected thread stack");
+
+ thread->_self_raw_id = raw_id; // mark for quick retrieval
+ _get_thread_cache[ index ] = thread;
+ }
+ return thread;
+}
+
+
+static const double all_zero[ sizeof(Thread) / sizeof(double) + 1 ] = {0};
+#define NO_CACHED_THREAD ((Thread*)all_zero)
+
+void ThreadLocalStorage::pd_set_thread(Thread* thread) {
+
+ // Store the new value before updating the cache to prevent a race
+ // between get_thread_via_cache_slowly() and this store operation.
+ os::thread_local_storage_at_put(ThreadLocalStorage::thread_index(), thread);
+
+ // Update thread cache with new thread if setting on thread create,
+ // or NO_CACHED_THREAD (zeroed) thread if resetting thread on exit.
+ uintptr_t raw = pd_raw_thread_id();
+ int ix = pd_cache_index(raw);
+ _get_thread_cache[ix] = thread == NULL ? NO_CACHED_THREAD : thread;
+}
+
+void ThreadLocalStorage::pd_init() {
+ for (int i = 0; i < _pd_cache_size; i++) {
+ _get_thread_cache[i] = NO_CACHED_THREAD;
+ }
+}
+
+// Invalidate all the caches (happens to be the same as pd_init).
+void ThreadLocalStorage::pd_invalidate_all() { pd_init(); }
+
+#undef NO_CACHED_THREAD
+
+// END Thread Local Storage
+
+static inline size_t adjust_stack_size(address base, size_t size) {
+ if ((ssize_t)size < 0) {
+ // 4759953: Compensate for ridiculous stack size.
+ size = max_intx;
+ }
+ if (size > (size_t)base) {
+ // 4812466: Make sure size doesn't allow the stack to wrap the address space.
+ size = (size_t)base;
+ }
+ return size;
+}
+
+static inline stack_t get_stack_info() {
+ stack_t st;
+ int retval = thr_stksegment(&st);
+ st.ss_size = adjust_stack_size((address)st.ss_sp, st.ss_size);
+ assert(retval == 0, "incorrect return value from thr_stksegment");
+ assert((address)&st < (address)st.ss_sp, "Invalid stack base returned");
+ assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned");
+ return st;
+}
+
+address os::current_stack_base() {
+ int r = thr_main() ;
+ guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ;
+ bool is_primordial_thread = r;
+
+ // Workaround 4352906, avoid calls to thr_stksegment by
+ // thr_main after the first one (it looks like we trash
+ // some data, causing the value for ss_sp to be incorrect).
+ if (!is_primordial_thread || os::Solaris::_main_stack_base == NULL) {
+ stack_t st = get_stack_info();
+ if (is_primordial_thread) {
+ // cache initial value of stack base
+ os::Solaris::_main_stack_base = (address)st.ss_sp;
+ }
+ return (address)st.ss_sp;
+ } else {
+ guarantee(os::Solaris::_main_stack_base != NULL, "Attempt to use null cached stack base");
+ return os::Solaris::_main_stack_base;
+ }
+}
+
+size_t os::current_stack_size() {
+ size_t size;
+
+ int r = thr_main() ;
+ guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ;
+ if(!r) {
+ size = get_stack_info().ss_size;
+ } else {
+ struct rlimit limits;
+ getrlimit(RLIMIT_STACK, &limits);
+ size = adjust_stack_size(os::Solaris::_main_stack_base, (size_t)limits.rlim_cur);
+ }
+ // base may not be page aligned
+ address base = current_stack_base();
+ address bottom = (address)align_size_up((intptr_t)(base - size), os::vm_page_size());;
+ return (size_t)(base - bottom);
+}
+
+// interruptible infrastructure
+
+// setup_interruptible saves the thread state before going into an
+// interruptible system call.
+// The saved state is used to restore the thread to
+// its former state whether or not an interrupt is received.
+// Used by classloader os::read
+// hpi calls skip this layer and stay in _thread_in_native
+
+void os::Solaris::setup_interruptible(JavaThread* thread) {
+
+ JavaThreadState thread_state = thread->thread_state();
+
+ assert(thread_state != _thread_blocked, "Coming from the wrong thread");
+ assert(thread_state != _thread_in_native, "Native threads skip setup_interruptible");
+ OSThread* osthread = thread->osthread();
+ osthread->set_saved_interrupt_thread_state(thread_state);
+ thread->frame_anchor()->make_walkable(thread);
+ ThreadStateTransition::transition(thread, thread_state, _thread_blocked);
+}
+
+// Version of setup_interruptible() for threads that are already in
+// _thread_blocked. Used by os_sleep().
+void os::Solaris::setup_interruptible_already_blocked(JavaThread* thread) {
+ thread->frame_anchor()->make_walkable(thread);
+}
+
+JavaThread* os::Solaris::setup_interruptible() {
+ JavaThread* thread = (JavaThread*)ThreadLocalStorage::thread();
+ setup_interruptible(thread);
+ return thread;
+}
+
+void os::Solaris::try_enable_extended_io() {
+ typedef int (*enable_extended_FILE_stdio_t)(int, int);
+
+ if (!UseExtendedFileIO) {
+ return;
+ }
+
+ enable_extended_FILE_stdio_t enabler =
+ (enable_extended_FILE_stdio_t) dlsym(RTLD_DEFAULT,
+ "enable_extended_FILE_stdio");
+ if (enabler) {
+ enabler(-1, -1);
+ }
+}
+
+
+#ifdef ASSERT
+
+JavaThread* os::Solaris::setup_interruptible_native() {
+ JavaThread* thread = (JavaThread*)ThreadLocalStorage::thread();
+ JavaThreadState thread_state = thread->thread_state();
+ assert(thread_state == _thread_in_native, "Assumed thread_in_native");
+ return thread;
+}
+
+void os::Solaris::cleanup_interruptible_native(JavaThread* thread) {
+ JavaThreadState thread_state = thread->thread_state();
+ assert(thread_state == _thread_in_native, "Assumed thread_in_native");
+}
+#endif
+
+// cleanup_interruptible reverses the effects of setup_interruptible
+// setup_interruptible_already_blocked() does not need any cleanup.
+
+void os::Solaris::cleanup_interruptible(JavaThread* thread) {
+ OSThread* osthread = thread->osthread();
+
+ ThreadStateTransition::transition(thread, _thread_blocked, osthread->saved_interrupt_thread_state());
+}
+
+// I/O interruption related counters called in _INTERRUPTIBLE
+
+void os::Solaris::bump_interrupted_before_count() {
+ RuntimeService::record_interrupted_before_count();
+}
+
+void os::Solaris::bump_interrupted_during_count() {
+ RuntimeService::record_interrupted_during_count();
+}
+
+static int _processors_online = 0;
+
+ jint os::Solaris::_os_thread_limit = 0;
+volatile jint os::Solaris::_os_thread_count = 0;
+
+julong os::available_memory() {
+ return Solaris::available_memory();
+}
+
+julong os::Solaris::available_memory() {
+ return (julong)sysconf(_SC_AVPHYS_PAGES) * os::vm_page_size();
+}
+
+julong os::Solaris::_physical_memory = 0;
+
+julong os::physical_memory() {
+ return Solaris::physical_memory();
+}
+
+julong os::allocatable_physical_memory(julong size) {
+#ifdef _LP64
+ return size;
+#else
+ julong result = MIN2(size, (julong)3835*M);
+ if (!is_allocatable(result)) {
+ // Memory allocations will be aligned but the alignment
+ // is not known at this point. Alignments will
+ // be at most to LargePageSizeInBytes. Protect
+ // allocations from alignments up to illegal
+ // values. If at this point 2G is illegal.
+ julong reasonable_size = (julong)2*G - 2 * LargePageSizeInBytes;
+ result = MIN2(size, reasonable_size);
+ }
+ return result;
+#endif
+}
+
+static hrtime_t first_hrtime = 0;
+static const hrtime_t hrtime_hz = 1000*1000*1000;
+const int LOCK_BUSY = 1;
+const int LOCK_FREE = 0;
+const int LOCK_INVALID = -1;
+static volatile hrtime_t max_hrtime = 0;
+static volatile int max_hrtime_lock = LOCK_FREE; // Update counter with LSB as lock-in-progress
+
+
+void os::Solaris::initialize_system_info() {
+ _processor_count = sysconf(_SC_NPROCESSORS_CONF);
+ _processors_online = sysconf (_SC_NPROCESSORS_ONLN);
+ _physical_memory = (julong)sysconf(_SC_PHYS_PAGES) * (julong)sysconf(_SC_PAGESIZE);
+}
+
+int os::active_processor_count() {
+ int online_cpus = sysconf(_SC_NPROCESSORS_ONLN);
+ pid_t pid = getpid();
+ psetid_t pset = PS_NONE;
+ // Are we running in a processor set?
+ if (pset_bind(PS_QUERY, P_PID, pid, &pset) == 0) {
+ if (pset != PS_NONE) {
+ uint_t pset_cpus;
+ // Query number of cpus in processor set
+ if (pset_info(pset, NULL, &pset_cpus, NULL) == 0) {
+ assert(pset_cpus > 0 && pset_cpus <= online_cpus, "sanity check");
+ _processors_online = pset_cpus;
+ return pset_cpus;
+ }
+ }
+ }
+ // Otherwise return number of online cpus
+ return online_cpus;
+}
+
+static bool find_processors_in_pset(psetid_t pset,
+ processorid_t** id_array,
+ uint_t* id_length) {
+ bool result = false;
+ // Find the number of processors in the processor set.
+ if (pset_info(pset, NULL, id_length, NULL) == 0) {
+ // Make up an array to hold their ids.
+ *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length);
+ // Fill in the array with their processor ids.
+ if (pset_info(pset, NULL, id_length, *id_array) == 0) {
+ result = true;
+ }
+ }
+ return result;
+}
+
+// Callers of find_processors_online() must tolerate imprecise results --
+// the system configuration can change asynchronously because of DR
+// or explicit psradm operations.
+//
+// We also need to take care that the loop (below) terminates as the
+// number of processors online can change between the _SC_NPROCESSORS_ONLN
+// request and the loop that builds the list of processor ids. Unfortunately
+// there's no reliable way to determine the maximum valid processor id,
+// so we use a manifest constant, MAX_PROCESSOR_ID, instead. See p_online
+// man pages, which claim the processor id set is "sparse, but
+// not too sparse". MAX_PROCESSOR_ID is used to ensure that we eventually
+// exit the loop.
+//
+// In the future we'll be able to use sysconf(_SC_CPUID_MAX), but that's
+// not available on S8.0.
+
+static bool find_processors_online(processorid_t** id_array,
+ uint* id_length) {
+ const processorid_t MAX_PROCESSOR_ID = 100000 ;
+ // Find the number of processors online.
+ *id_length = sysconf(_SC_NPROCESSORS_ONLN);
+ // Make up an array to hold their ids.
+ *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length);
+ // Processors need not be numbered consecutively.
+ long found = 0;
+ processorid_t next = 0;
+ while (found < *id_length && next < MAX_PROCESSOR_ID) {
+ processor_info_t info;
+ if (processor_info(next, &info) == 0) {
+ // NB, PI_NOINTR processors are effectively online ...
+ if (info.pi_state == P_ONLINE || info.pi_state == P_NOINTR) {
+ (*id_array)[found] = next;
+ found += 1;
+ }
+ }
+ next += 1;
+ }
+ if (found < *id_length) {
+ // The loop above didn't identify the expected number of processors.
+ // We could always retry the operation, calling sysconf(_SC_NPROCESSORS_ONLN)
+ // and re-running the loop, above, but there's no guarantee of progress
+ // if the system configuration is in flux. Instead, we just return what
+ // we've got. Note that in the worst case find_processors_online() could
+ // return an empty set. (As a fall-back in the case of the empty set we
+ // could just return the ID of the current processor).
+ *id_length = found ;
+ }
+
+ return true;
+}
+
+static bool assign_distribution(processorid_t* id_array,
+ uint id_length,
+ uint* distribution,
+ uint distribution_length) {
+ // We assume we can assign processorid_t's to uint's.
+ assert(sizeof(processorid_t) == sizeof(uint),
+ "can't convert processorid_t to uint");
+ // Quick check to see if we won't succeed.
+ if (id_length < distribution_length) {
+ return false;
+ }
+ // Assign processor ids to the distribution.
+ // Try to shuffle processors to distribute work across boards,
+ // assuming 4 processors per board.
+ const uint processors_per_board = ProcessDistributionStride;
+ // Find the maximum processor id.
+ processorid_t max_id = 0;
+ for (uint m = 0; m < id_length; m += 1) {
+ max_id = MAX2(max_id, id_array[m]);
+ }
+ // The next id, to limit loops.
+ const processorid_t limit_id = max_id + 1;
+ // Make up markers for available processors.
+ bool* available_id = NEW_C_HEAP_ARRAY(bool, limit_id);
+ for (uint c = 0; c < limit_id; c += 1) {
+ available_id[c] = false;
+ }
+ for (uint a = 0; a < id_length; a += 1) {
+ available_id[id_array[a]] = true;
+ }
+ // Step by "boards", then by "slot", copying to "assigned".
+ // NEEDS_CLEANUP: The assignment of processors should be stateful,
+ // remembering which processors have been assigned by
+ // previous calls, etc., so as to distribute several
+ // independent calls of this method. What we'd like is
+ // It would be nice to have an API that let us ask
+ // how many processes are bound to a processor,
+ // but we don't have that, either.
+ // In the short term, "board" is static so that
+ // subsequent distributions don't all start at board 0.
+ static uint board = 0;
+ uint assigned = 0;
+ // Until we've found enough processors ....
+ while (assigned < distribution_length) {
+ // ... find the next available processor in the board.
+ for (uint slot = 0; slot < processors_per_board; slot += 1) {
+ uint try_id = board * processors_per_board + slot;
+ if ((try_id < limit_id) && (available_id[try_id] == true)) {
+ distribution[assigned] = try_id;
+ available_id[try_id] = false;
+ assigned += 1;
+ break;
+ }
+ }
+ board += 1;
+ if (board * processors_per_board + 0 >= limit_id) {
+ board = 0;
+ }
+ }
+ if (available_id != NULL) {
+ FREE_C_HEAP_ARRAY(bool, available_id);
+ }
+ return true;
+}
+
+bool os::distribute_processes(uint length, uint* distribution) {
+ bool result = false;
+ // Find the processor id's of all the available CPUs.
+ processorid_t* id_array = NULL;
+ uint id_length = 0;
+ // There are some races between querying information and using it,
+ // since processor sets can change dynamically.
+ psetid_t pset = PS_NONE;
+ // Are we running in a processor set?
+ if ((pset_bind(PS_QUERY, P_PID, P_MYID, &pset) == 0) && pset != PS_NONE) {
+ result = find_processors_in_pset(pset, &id_array, &id_length);
+ } else {
+ result = find_processors_online(&id_array, &id_length);
+ }
+ if (result == true) {
+ if (id_length >= length) {
+ result = assign_distribution(id_array, id_length, distribution, length);
+ } else {
+ result = false;
+ }
+ }
+ if (id_array != NULL) {
+ FREE_C_HEAP_ARRAY(processorid_t, id_array);
+ }
+ return result;
+}
+
+bool os::bind_to_processor(uint processor_id) {
+ // We assume that a processorid_t can be stored in a uint.
+ assert(sizeof(uint) == sizeof(processorid_t),
+ "can't convert uint to processorid_t");
+ int bind_result =
+ processor_bind(P_LWPID, // bind LWP.
+ P_MYID, // bind current LWP.
+ (processorid_t) processor_id, // id.
+ NULL); // don't return old binding.
+ return (bind_result == 0);
+}
+
+bool os::getenv(const char* name, char* buffer, int len) {
+ char* val = ::getenv( name );
+ if ( val == NULL
+ || strlen(val) + 1 > len ) {
+ if (len > 0) buffer[0] = 0; // return a null string
+ return false;
+ }
+ strcpy( buffer, val );
+ return true;
+}
+
+
+// Return true if user is running as root.
+
+bool os::have_special_privileges() {
+ static bool init = false;
+ static bool privileges = false;
+ if (!init) {
+ privileges = (getuid() != geteuid()) || (getgid() != getegid());
+ init = true;
+ }
+ return privileges;
+}
+
+
+static char* get_property(char* name, char* buffer, int buffer_size) {
+ if (os::getenv(name, buffer, buffer_size)) {
+ return buffer;
+ }
+ static char empty[] = "";
+ return empty;
+}
+
+
+void os::init_system_properties_values() {
+ char arch[12];
+ sysinfo(SI_ARCHITECTURE, arch, sizeof(arch));
+
+ // The next steps are taken in the product version:
+ //
+ // Obtain the JAVA_HOME value from the location of libjvm[_g].so.
+ // This library should be located at:
+ // <JAVA_HOME>/jre/lib/<arch>/{client|server}/libjvm[_g].so.
+ //
+ // If "/jre/lib/" appears at the right place in the path, then we
+ // assume libjvm[_g].so is installed in a JDK and we use this path.
+ //
+ // Otherwise exit with message: "Could not create the Java virtual machine."
+ //
+ // The following extra steps are taken in the debugging version:
+ //
+ // If "/jre/lib/" does NOT appear at the right place in the path
+ // instead of exit check for $JAVA_HOME environment variable.
+ //
+ // If it is defined and we are able to locate $JAVA_HOME/jre/lib/<arch>,
+ // then we append a fake suffix "hotspot/libjvm[_g].so" to this path so
+ // it looks like libjvm[_g].so is installed there
+ // <JAVA_HOME>/jre/lib/<arch>/hotspot/libjvm[_g].so.
+ //
+ // Otherwise exit.
+ //
+ // Important note: if the location of libjvm.so changes this
+ // code needs to be changed accordingly.
+
+ // The next few definitions allow the code to be verbatim:
+#define malloc(n) (char*)NEW_C_HEAP_ARRAY(char, (n))
+#define free(p) FREE_C_HEAP_ARRAY(char, p)
+#define getenv(n) ::getenv(n)
+
+#define EXTENSIONS_DIR "/lib/ext"
+#define ENDORSED_DIR "/lib/endorsed"
+#define COMMON_DIR "/usr/jdk/packages"
+
+ {
+ /* sysclasspath, java_home, dll_dir */
+ {
+ char *home_path;
+ char *dll_path;
+ char *pslash;
+ char buf[MAXPATHLEN];
+ os::jvm_path(buf, sizeof(buf));
+
+ // Found the full path to libjvm.so.
+ // Now cut the path to <java_home>/jre if we can.
+ *(strrchr(buf, '/')) = '\0'; /* get rid of /libjvm.so */
+ pslash = strrchr(buf, '/');
+ if (pslash != NULL)
+ *pslash = '\0'; /* get rid of /{client|server|hotspot} */
+ dll_path = malloc(strlen(buf) + 1);
+ if (dll_path == NULL)
+ return;
+ strcpy(dll_path, buf);
+ Arguments::set_dll_dir(dll_path);
+
+ if (pslash != NULL) {
+ pslash = strrchr(buf, '/');
+ if (pslash != NULL) {
+ *pslash = '\0'; /* get rid of /<arch> */
+ pslash = strrchr(buf, '/');
+ if (pslash != NULL)
+ *pslash = '\0'; /* get rid of /lib */
+ }
+ }
+
+ home_path = malloc(strlen(buf) + 1);
+ if (home_path == NULL)
+ return;
+ strcpy(home_path, buf);
+ Arguments::set_java_home(home_path);
+
+ if (!set_boot_path('/', ':'))
+ return;
+ }
+
+ /*
+ * Where to look for native libraries
+ */
+ {
+ // Use dlinfo() to determine the correct java.library.path.
+ //
+ // If we're launched by the Java launcher, and the user
+ // does not set java.library.path explicitly on the commandline,
+ // the Java launcher sets LD_LIBRARY_PATH for us and unsets
+ // LD_LIBRARY_PATH_32 and LD_LIBRARY_PATH_64. In this case
+ // dlinfo returns LD_LIBRARY_PATH + crle settings (including
+ // /usr/lib), which is exactly what we want.
+ //
+ // If the user does set java.library.path, it completely
+ // overwrites this setting, and always has.
+ //
+ // If we're not launched by the Java launcher, we may
+ // get here with any/all of the LD_LIBRARY_PATH[_32|64]
+ // settings. Again, dlinfo does exactly what we want.
+
+ Dl_serinfo _info, *info = &_info;
+ Dl_serpath *path;
+ char* library_path;
+ char *common_path;
+ int i;
+
+ // determine search path count and required buffer size
+ if (dlinfo(RTLD_SELF, RTLD_DI_SERINFOSIZE, (void *)info) == -1) {
+ vm_exit_during_initialization("dlinfo SERINFOSIZE request", dlerror());
+ }
+
+ // allocate new buffer and initialize
+ info = (Dl_serinfo*)malloc(_info.dls_size);
+ if (info == NULL) {
+ vm_exit_out_of_memory(_info.dls_size,
+ "init_system_properties_values info");
+ }
+ info->dls_size = _info.dls_size;
+ info->dls_cnt = _info.dls_cnt;
+
+ // obtain search path information
+ if (dlinfo(RTLD_SELF, RTLD_DI_SERINFO, (void *)info) == -1) {
+ free(info);
+ vm_exit_during_initialization("dlinfo SERINFO request", dlerror());
+ }
+
+ path = &info->dls_serpath[0];
+
+ // Note: Due to a legacy implementation, most of the library path
+ // is set in the launcher. This was to accomodate linking restrictions
+ // on legacy Solaris implementations (which are no longer supported).
+ // Eventually, all the library path setting will be done here.
+ //
+ // However, to prevent the proliferation of improperly built native
+ // libraries, the new path component /usr/jdk/packages is added here.
+
+ // Determine the actual CPU architecture.
+ char cpu_arch[12];
+ sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch));
+#ifdef _LP64
+ // If we are a 64-bit vm, perform the following translations:
+ // sparc -> sparcv9
+ // i386 -> amd64
+ if (strcmp(cpu_arch, "sparc") == 0)
+ strcat(cpu_arch, "v9");
+ else if (strcmp(cpu_arch, "i386") == 0)
+ strcpy(cpu_arch, "amd64");
+#endif
+
+ // Construct the invariant part of ld_library_path. Note that the
+ // space for the colon and the trailing null are provided by the
+ // nulls included by the sizeof operator.
+ size_t bufsize = sizeof(COMMON_DIR) + sizeof("/lib/") + strlen(cpu_arch);
+ common_path = malloc(bufsize);
+ if (common_path == NULL) {
+ free(info);
+ vm_exit_out_of_memory(bufsize,
+ "init_system_properties_values common_path");
+ }
+ sprintf(common_path, COMMON_DIR "/lib/%s", cpu_arch);
+
+ // struct size is more than sufficient for the path components obtained
+ // through the dlinfo() call, so only add additional space for the path
+ // components explicitly added here.
+ bufsize = info->dls_size + strlen(common_path);
+ library_path = malloc(bufsize);
+ if (library_path == NULL) {
+ free(info);
+ free(common_path);
+ vm_exit_out_of_memory(bufsize,
+ "init_system_properties_values library_path");
+ }
+ library_path[0] = '\0';
+
+ // Construct the desired Java library path from the linker's library
+ // search path.
+ //
+ // For compatibility, it is optimal that we insert the additional path
+ // components specific to the Java VM after those components specified
+ // in LD_LIBRARY_PATH (if any) but before those added by the ld.so
+ // infrastructure.
+ if (info->dls_cnt == 0) { // Not sure this can happen, but allow for it
+ strcpy(library_path, common_path);
+ } else {
+ int inserted = 0;
+ for (i = 0; i < info->dls_cnt; i++, path++) {
+ uint_t flags = path->dls_flags & LA_SER_MASK;
+ if (((flags & LA_SER_LIBPATH) == 0) && !inserted) {
+ strcat(library_path, common_path);
+ strcat(library_path, os::path_separator());
+ inserted = 1;
+ }
+ strcat(library_path, path->dls_name);
+ strcat(library_path, os::path_separator());
+ }
+ // eliminate trailing path separator
+ library_path[strlen(library_path)-1] = '\0';
+ }
+
+ // happens before argument parsing - can't use a trace flag
+ // tty->print_raw("init_system_properties_values: native lib path: ");
+ // tty->print_raw_cr(library_path);
+
+ // callee copies into its own buffer
+ Arguments::set_library_path(library_path);
+
+ free(common_path);
+ free(library_path);
+ free(info);
+ }
+
+ /*
+ * Extensions directories.
+ *
+ * Note that the space for the colon and the trailing null are provided
+ * by the nulls included by the sizeof operator (so actually one byte more
+ * than necessary is allocated).
+ */
+ {
+ char *buf = (char *) malloc(strlen(Arguments::get_java_home()) +
+ sizeof(EXTENSIONS_DIR) + sizeof(COMMON_DIR) +
+ sizeof(EXTENSIONS_DIR));
+ sprintf(buf, "%s" EXTENSIONS_DIR ":" COMMON_DIR EXTENSIONS_DIR,
+ Arguments::get_java_home());
+ Arguments::set_ext_dirs(buf);
+ }
+
+ /* Endorsed standards default directory. */
+ {
+ char * buf = malloc(strlen(Arguments::get_java_home()) + sizeof(ENDORSED_DIR));
+ sprintf(buf, "%s" ENDORSED_DIR, Arguments::get_java_home());
+ Arguments::set_endorsed_dirs(buf);
+ }
+ }
+
+#undef malloc
+#undef free
+#undef getenv
+#undef EXTENSIONS_DIR
+#undef ENDORSED_DIR
+#undef COMMON_DIR
+
+}
+
+void os::breakpoint() {
+ BREAKPOINT;
+}
+
+bool os::obsolete_option(const JavaVMOption *option)
+{
+ if (!strncmp(option->optionString, "-Xt", 3)) {
+ return true;
+ } else if (!strncmp(option->optionString, "-Xtm", 4)) {
+ return true;
+ } else if (!strncmp(option->optionString, "-Xverifyheap", 12)) {
+ return true;
+ } else if (!strncmp(option->optionString, "-Xmaxjitcodesize", 16)) {
+ return true;
+ }
+ return false;
+}
+
+bool os::Solaris::valid_stack_address(Thread* thread, address sp) {
+ address stackStart = (address)thread->stack_base();
+ address stackEnd = (address)(stackStart - (address)thread->stack_size());
+ if (sp < stackStart && sp >= stackEnd ) return true;
+ return false;
+}
+
+extern "C" void breakpoint() {
+ // use debugger to set breakpoint here
+}
+
+// Returns an estimate of the current stack pointer. Result must be guaranteed to
+// point into the calling threads stack, and be no lower than the current stack
+// pointer.
+address os::current_stack_pointer() {
+ volatile int dummy;
+ address sp = (address)&dummy + 8; // %%%% need to confirm if this is right
+ return sp;
+}
+
+static thread_t main_thread;
+
+// Thread start routine for all new Java threads
+extern "C" void* java_start(void* thread_addr) {
+ // Try to randomize the cache line index of hot stack frames.
+ // This helps when threads of the same stack traces evict each other's
+ // cache lines. The threads can be either from the same JVM instance, or
+ // from different JVM instances. The benefit is especially true for
+ // processors with hyperthreading technology.
+ static int counter = 0;
+ int pid = os::current_process_id();
+ alloca(((pid ^ counter++) & 7) * 128);
+
+ int prio;
+ Thread* thread = (Thread*)thread_addr;
+ OSThread* osthr = thread->osthread();
+
+ osthr->set_lwp_id( _lwp_self() ); // Store lwp in case we are bound
+ thread->_schedctl = (void *) schedctl_init () ;
+
+ if (UseNUMA) {
+ int lgrp_id = os::numa_get_group_id();
+ if (lgrp_id != -1) {
+ thread->set_lgrp_id(lgrp_id);
+ }
+ }
+
+ // If the creator called set priority before we started,
+ // we need to call set priority now that we have an lwp.
+ // Get the priority from libthread and set the priority
+ // for the new Solaris lwp.
+ if ( osthr->thread_id() != -1 ) {
+ if ( UseThreadPriorities ) {
+ thr_getprio(osthr->thread_id(), &prio);
+ if (ThreadPriorityVerbose) {
+ tty->print_cr("Starting Thread " INTPTR_FORMAT ", LWP is " INTPTR_FORMAT ", setting priority: %d\n",
+ osthr->thread_id(), osthr->lwp_id(), prio );
+ }
+ os::set_native_priority(thread, prio);
+ }
+ } else if (ThreadPriorityVerbose) {
+ warning("Can't set priority in _start routine, thread id hasn't been set\n");
+ }
+
+ assert(osthr->get_state() == RUNNABLE, "invalid os thread state");
+
+ // initialize signal mask for this thread
+ os::Solaris::hotspot_sigmask(thread);
+
+ thread->run();
+
+ // One less thread is executing
+ // When the VMThread gets here, the main thread may have already exited
+ // which frees the CodeHeap containing the Atomic::dec code
+ if (thread != VMThread::vm_thread() && VMThread::vm_thread() != NULL) {
+ Atomic::dec(&os::Solaris::_os_thread_count);
+ }
+
+ if (UseDetachedThreads) {
+ thr_exit(NULL);
+ ShouldNotReachHere();
+ }
+ return NULL;
+}
+
+static OSThread* create_os_thread(Thread* thread, thread_t thread_id) {
+ // Allocate the OSThread object
+ OSThread* osthread = new OSThread(NULL, NULL);
+ if (osthread == NULL) return NULL;
+
+ // Store info on the Solaris thread into the OSThread
+ osthread->set_thread_id(thread_id);
+ osthread->set_lwp_id(_lwp_self());
+ thread->_schedctl = (void *) schedctl_init () ;
+
+ if (UseNUMA) {
+ int lgrp_id = os::numa_get_group_id();
+ if (lgrp_id != -1) {
+ thread->set_lgrp_id(lgrp_id);
+ }
+ }
+
+ if ( ThreadPriorityVerbose ) {
+ tty->print_cr("In create_os_thread, Thread " INTPTR_FORMAT ", LWP is " INTPTR_FORMAT "\n",
+ osthread->thread_id(), osthread->lwp_id() );
+ }
+
+ // Initial thread state is INITIALIZED, not SUSPENDED
+ osthread->set_state(INITIALIZED);
+
+ return osthread;
+}
+
+void os::Solaris::hotspot_sigmask(Thread* thread) {
+
+ //Save caller's signal mask
+ sigset_t sigmask;
+ thr_sigsetmask(SIG_SETMASK, NULL, &sigmask);
+ OSThread *osthread = thread->osthread();
+ osthread->set_caller_sigmask(sigmask);
+
+ thr_sigsetmask(SIG_UNBLOCK, os::Solaris::unblocked_signals(), NULL);
+ if (!ReduceSignalUsage) {
+ if (thread->is_VM_thread()) {
+ // Only the VM thread handles BREAK_SIGNAL ...
+ thr_sigsetmask(SIG_UNBLOCK, vm_signals(), NULL);
+ } else {
+ // ... all other threads block BREAK_SIGNAL
+ assert(!sigismember(vm_signals(), SIGINT), "SIGINT should not be blocked");
+ thr_sigsetmask(SIG_BLOCK, vm_signals(), NULL);
+ }
+ }
+}
+
+bool os::create_attached_thread(JavaThread* thread) {
+#ifdef ASSERT
+ thread->verify_not_published();
+#endif
+ OSThread* osthread = create_os_thread(thread, thr_self());
+ if (osthread == NULL) {
+ return false;
+ }
+
+ // Initial thread state is RUNNABLE
+ osthread->set_state(RUNNABLE);
+ thread->set_osthread(osthread);
+
+ // initialize signal mask for this thread
+ // and save the caller's signal mask
+ os::Solaris::hotspot_sigmask(thread);
+
+ return true;
+}
+
+bool os::create_main_thread(JavaThread* thread) {
+#ifdef ASSERT
+ thread->verify_not_published();
+#endif
+ if (_starting_thread == NULL) {
+ _starting_thread = create_os_thread(thread, main_thread);
+ if (_starting_thread == NULL) {
+ return false;
+ }
+ }
+
+ // The primodial thread is runnable from the start
+ _starting_thread->set_state(RUNNABLE);
+
+ thread->set_osthread(_starting_thread);
+
+ // initialize signal mask for this thread
+ // and save the caller's signal mask
+ os::Solaris::hotspot_sigmask(thread);
+
+ return true;
+}
+
+// _T2_libthread is true if we believe we are running with the newer
+// SunSoft lwp/libthread.so (2.8 patch, 2.9 default)
+bool os::Solaris::_T2_libthread = false;
+
+bool os::create_thread(Thread* thread, ThreadType thr_type, size_t stack_size) {
+ // Allocate the OSThread object
+ OSThread* osthread = new OSThread(NULL, NULL);
+ if (osthread == NULL) {
+ return false;
+ }
+
+ if ( ThreadPriorityVerbose ) {
+ char *thrtyp;
+ switch ( thr_type ) {
+ case vm_thread:
+ thrtyp = (char *)"vm";
+ break;
+ case cgc_thread:
+ thrtyp = (char *)"cgc";
+ break;
+ case pgc_thread:
+ thrtyp = (char *)"pgc";
+ break;
+ case java_thread:
+ thrtyp = (char *)"java";
+ break;
+ case compiler_thread:
+ thrtyp = (char *)"compiler";
+ break;
+ case watcher_thread:
+ thrtyp = (char *)"watcher";
+ break;
+ default:
+ thrtyp = (char *)"unknown";
+ break;
+ }
+ tty->print_cr("In create_thread, creating a %s thread\n", thrtyp);
+ }
+
+ // Calculate stack size if it's not specified by caller.
+ if (stack_size == 0) {
+ // The default stack size 1M (2M for LP64).
+ stack_size = (BytesPerWord >> 2) * K * K;
+
+ switch (thr_type) {
+ case os::java_thread:
+ // Java threads use ThreadStackSize which default value can be changed with the flag -Xss
+ if (JavaThread::stack_size_at_create() > 0) stack_size = JavaThread::stack_size_at_create();
+ break;
+ case os::compiler_thread:
+ if (CompilerThreadStackSize > 0) {
+ stack_size = (size_t)(CompilerThreadStackSize * K);
+ break;
+ } // else fall through:
+ // use VMThreadStackSize if CompilerThreadStackSize is not defined
+ case os::vm_thread:
+ case os::pgc_thread:
+ case os::cgc_thread:
+ case os::watcher_thread:
+ if (VMThreadStackSize > 0) stack_size = (size_t)(VMThreadStackSize * K);
+ break;
+ }
+ }
+ stack_size = MAX2(stack_size, os::Solaris::min_stack_allowed);
+
+ // Initial state is ALLOCATED but not INITIALIZED
+ osthread->set_state(ALLOCATED);
+
+ if (os::Solaris::_os_thread_count > os::Solaris::_os_thread_limit) {
+ // We got lots of threads. Check if we still have some address space left.
+ // Need to be at least 5Mb of unreserved address space. We do check by
+ // trying to reserve some.
+ const size_t VirtualMemoryBangSize = 20*K*K;
+ char* mem = os::reserve_memory(VirtualMemoryBangSize);
+ if (mem == NULL) {
+ delete osthread;
+ return false;
+ } else {
+ // Release the memory again
+ os::release_memory(mem, VirtualMemoryBangSize);
+ }
+ }
+
+ // Setup osthread because the child thread may need it.
+ thread->set_osthread(osthread);
+
+ // Create the Solaris thread
+ // explicit THR_BOUND for T2_libthread case in case
+ // that assumption is not accurate, but our alternate signal stack
+ // handling is based on it which must have bound threads
+ thread_t tid = 0;
+ long flags = (UseDetachedThreads ? THR_DETACHED : 0) | THR_SUSPENDED
+ | ((UseBoundThreads || os::Solaris::T2_libthread() ||
+ (thr_type == vm_thread) ||
+ (thr_type == cgc_thread) ||
+ (thr_type == pgc_thread) ||
+ (thr_type == compiler_thread && BackgroundCompilation)) ?
+ THR_BOUND : 0);
+ int status;
+
+ // 4376845 -- libthread/kernel don't provide enough LWPs to utilize all CPUs.
+ //
+ // On multiprocessors systems, libthread sometimes under-provisions our
+ // process with LWPs. On a 30-way systems, for instance, we could have
+ // 50 user-level threads in ready state and only 2 or 3 LWPs assigned
+ // to our process. This can result in under utilization of PEs.
+ // I suspect the problem is related to libthread's LWP
+ // pool management and to the kernel's SIGBLOCKING "last LWP parked"
+ // upcall policy.
+ //
+ // The following code is palliative -- it attempts to ensure that our
+ // process has sufficient LWPs to take advantage of multiple PEs.
+ // Proper long-term cures include using user-level threads bound to LWPs
+ // (THR_BOUND) or using LWP-based synchronization. Note that there is a
+ // slight timing window with respect to sampling _os_thread_count, but
+ // the race is benign. Also, we should periodically recompute
+ // _processors_online as the min of SC_NPROCESSORS_ONLN and the
+ // the number of PEs in our partition. You might be tempted to use
+ // THR_NEW_LWP here, but I'd recommend against it as that could
+ // result in undesirable growth of the libthread's LWP pool.
+ // The fix below isn't sufficient; for instance, it doesn't take into count
+ // LWPs parked on IO. It does, however, help certain CPU-bound benchmarks.
+ //
+ // Some pathologies this scheme doesn't handle:
+ // * Threads can block, releasing the LWPs. The LWPs can age out.
+ // When a large number of threads become ready again there aren't
+ // enough LWPs available to service them. This can occur when the
+ // number of ready threads oscillates.
+ // * LWPs/Threads park on IO, thus taking the LWP out of circulation.
+ //
+ // Finally, we should call thr_setconcurrency() periodically to refresh
+ // the LWP pool and thwart the LWP age-out mechanism.
+ // The "+3" term provides a little slop -- we want to slightly overprovision.
+
+ if (AdjustConcurrency && os::Solaris::_os_thread_count < (_processors_online+3)) {
+ if (!(flags & THR_BOUND)) {
+ thr_setconcurrency (os::Solaris::_os_thread_count); // avoid starvation
+ }
+ }
+ // Although this doesn't hurt, we should warn of undefined behavior
+ // when using unbound T1 threads with schedctl(). This should never
+ // happen, as the compiler and VM threads are always created bound
+ DEBUG_ONLY(
+ if ((VMThreadHintNoPreempt || CompilerThreadHintNoPreempt) &&
+ (!os::Solaris::T2_libthread() && (!(flags & THR_BOUND))) &&
+ ((thr_type == vm_thread) || (thr_type == cgc_thread) ||
+ (thr_type == pgc_thread) || (thr_type == compiler_thread && BackgroundCompilation))) {
+ warning("schedctl behavior undefined when Compiler/VM/GC Threads are Unbound");
+ }
+ );
+
+
+ // Mark that we don't have an lwp or thread id yet.
+ // In case we attempt to set the priority before the thread starts.
+ osthread->set_lwp_id(-1);
+ osthread->set_thread_id(-1);
+
+ status = thr_create(NULL, stack_size, java_start, thread, flags, &tid);
+ if (status != 0) {
+ if (PrintMiscellaneous && (Verbose || WizardMode)) {
+ perror("os::create_thread");
+ }
+ thread->set_osthread(NULL);
+ // Need to clean up stuff we've allocated so far
+ delete osthread;
+ return false;
+ }
+
+ Atomic::inc(&os::Solaris::_os_thread_count);
+
+ // Store info on the Solaris thread into the OSThread
+ osthread->set_thread_id(tid);
+
+ // Remember that we created this thread so we can set priority on it
+ osthread->set_vm_created();
+
+ // Set the default thread priority otherwise use NormalPriority
+
+ if ( UseThreadPriorities ) {
+ thr_setprio(tid, (DefaultThreadPriority == -1) ?
+ java_to_os_priority[NormPriority] :
+ DefaultThreadPriority);
+ }
+
+ // Initial thread state is INITIALIZED, not SUSPENDED
+ osthread->set_state(INITIALIZED);
+
+ // The thread is returned suspended (in state INITIALIZED), and is started higher up in the call chain
+ return true;
+}
+
+/* defined for >= Solaris 10. This allows builds on earlier versions
+ * of Solaris to take advantage of the newly reserved Solaris JVM signals
+ * With SIGJVM1, SIGJVM2, INTERRUPT_SIGNAL is SIGJVM1, ASYNC_SIGNAL is SIGJVM2
+ * and -XX:+UseAltSigs does nothing since these should have no conflict
+ */
+#if !defined(SIGJVM1)
+#define SIGJVM1 39
+#define SIGJVM2 40
+#endif
+
+debug_only(static bool signal_sets_initialized = false);
+static sigset_t unblocked_sigs, vm_sigs, allowdebug_blocked_sigs;
+int os::Solaris::_SIGinterrupt = INTERRUPT_SIGNAL;
+int os::Solaris::_SIGasync = ASYNC_SIGNAL;
+
+bool os::Solaris::is_sig_ignored(int sig) {
+ struct sigaction oact;
+ sigaction(sig, (struct sigaction*)NULL, &oact);
+ void* ohlr = oact.sa_sigaction ? CAST_FROM_FN_PTR(void*, oact.sa_sigaction)
+ : CAST_FROM_FN_PTR(void*, oact.sa_handler);
+ if (ohlr == CAST_FROM_FN_PTR(void*, SIG_IGN))
+ return true;
+ else
+ return false;
+}
+
+// Note: SIGRTMIN is a macro that calls sysconf() so it will
+// dynamically detect SIGRTMIN value for the system at runtime, not buildtime
+static bool isJVM1available() {
+ return SIGJVM1 < SIGRTMIN;
+}
+
+void os::Solaris::signal_sets_init() {
+ // Should also have an assertion stating we are still single-threaded.
+ assert(!signal_sets_initialized, "Already initialized");
+ // Fill in signals that are necessarily unblocked for all threads in
+ // the VM. Currently, we unblock the following signals:
+ // SHUTDOWN{1,2,3}_SIGNAL: for shutdown hooks support (unless over-ridden
+ // by -Xrs (=ReduceSignalUsage));
+ // BREAK_SIGNAL which is unblocked only by the VM thread and blocked by all
+ // other threads. The "ReduceSignalUsage" boolean tells us not to alter
+ // the dispositions or masks wrt these signals.
+ // Programs embedding the VM that want to use the above signals for their
+ // own purposes must, at this time, use the "-Xrs" option to prevent
+ // interference with shutdown hooks and BREAK_SIGNAL thread dumping.
+ // (See bug 4345157, and other related bugs).
+ // In reality, though, unblocking these signals is really a nop, since
+ // these signals are not blocked by default.
+ sigemptyset(&unblocked_sigs);
+ sigemptyset(&allowdebug_blocked_sigs);
+ sigaddset(&unblocked_sigs, SIGILL);
+ sigaddset(&unblocked_sigs, SIGSEGV);
+ sigaddset(&unblocked_sigs, SIGBUS);
+ sigaddset(&unblocked_sigs, SIGFPE);
+
+ if (isJVM1available) {
+ os::Solaris::set_SIGinterrupt(SIGJVM1);
+ os::Solaris::set_SIGasync(SIGJVM2);
+ } else if (UseAltSigs) {
+ os::Solaris::set_SIGinterrupt(ALT_INTERRUPT_SIGNAL);
+ os::Solaris::set_SIGasync(ALT_ASYNC_SIGNAL);
+ } else {
+ os::Solaris::set_SIGinterrupt(INTERRUPT_SIGNAL);
+ os::Solaris::set_SIGasync(ASYNC_SIGNAL);
+ }
+
+ sigaddset(&unblocked_sigs, os::Solaris::SIGinterrupt());
+ sigaddset(&unblocked_sigs, os::Solaris::SIGasync());
+
+ if (!ReduceSignalUsage) {
+ if (!os::Solaris::is_sig_ignored(SHUTDOWN1_SIGNAL)) {
+ sigaddset(&unblocked_sigs, SHUTDOWN1_SIGNAL);
+ sigaddset(&allowdebug_blocked_sigs, SHUTDOWN1_SIGNAL);
+ }
+ if (!os::Solaris::is_sig_ignored(SHUTDOWN2_SIGNAL)) {
+ sigaddset(&unblocked_sigs, SHUTDOWN2_SIGNAL);
+ sigaddset(&allowdebug_blocked_sigs, SHUTDOWN2_SIGNAL);
+ }
+ if (!os::Solaris::is_sig_ignored(SHUTDOWN3_SIGNAL)) {
+ sigaddset(&unblocked_sigs, SHUTDOWN3_SIGNAL);
+ sigaddset(&allowdebug_blocked_sigs, SHUTDOWN3_SIGNAL);
+ }
+ }
+ // Fill in signals that are blocked by all but the VM thread.
+ sigemptyset(&vm_sigs);
+ if (!ReduceSignalUsage)
+ sigaddset(&vm_sigs, BREAK_SIGNAL);
+ debug_only(signal_sets_initialized = true);
+
+ // For diagnostics only used in run_periodic_checks
+ sigemptyset(&check_signal_done);
+}
+
+// These are signals that are unblocked while a thread is running Java.
+// (For some reason, they get blocked by default.)
+sigset_t* os::Solaris::unblocked_signals() {
+ assert(signal_sets_initialized, "Not initialized");
+ return &unblocked_sigs;
+}
+
+// These are the signals that are blocked while a (non-VM) thread is
+// running Java. Only the VM thread handles these signals.
+sigset_t* os::Solaris::vm_signals() {
+ assert(signal_sets_initialized, "Not initialized");
+ return &vm_sigs;
+}
+
+// These are signals that are blocked during cond_wait to allow debugger in
+sigset_t* os::Solaris::allowdebug_blocked_signals() {
+ assert(signal_sets_initialized, "Not initialized");
+ return &allowdebug_blocked_sigs;
+}
+
+// First crack at OS-specific initialization, from inside the new thread.
+void os::initialize_thread() {
+ int r = thr_main() ;
+ guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ;
+ if (r) {
+ JavaThread* jt = (JavaThread *)Thread::current();
+ assert(jt != NULL,"Sanity check");
+ size_t stack_size;
+ address base = jt->stack_base();
+ if (Arguments::created_by_java_launcher()) {
+ // Use 2MB to allow for Solaris 7 64 bit mode.
+ stack_size = JavaThread::stack_size_at_create() == 0
+ ? 2048*K : JavaThread::stack_size_at_create();
+
+ // There are rare cases when we may have already used more than
+ // the basic stack size allotment before this method is invoked.
+ // Attempt to allow for a normally sized java_stack.
+ size_t current_stack_offset = (size_t)(base - (address)&stack_size);
+ stack_size += ReservedSpace::page_align_size_down(current_stack_offset);
+ } else {
+ // 6269555: If we were not created by a Java launcher, i.e. if we are
+ // running embedded in a native application, treat the primordial thread
+ // as much like a native attached thread as possible. This means using
+ // the current stack size from thr_stksegment(), unless it is too large
+ // to reliably setup guard pages. A reasonable max size is 8MB.
+ size_t current_size = current_stack_size();
+ // This should never happen, but just in case....
+ if (current_size == 0) current_size = 2 * K * K;
+ stack_size = current_size > (8 * K * K) ? (8 * K * K) : current_size;
+ }
+ address bottom = (address)align_size_up((intptr_t)(base - stack_size), os::vm_page_size());;
+ stack_size = (size_t)(base - bottom);
+
+ assert(stack_size > 0, "Stack size calculation problem");
+
+ if (stack_size > jt->stack_size()) {
+ NOT_PRODUCT(
+ struct rlimit limits;
+ getrlimit(RLIMIT_STACK, &limits);
+ size_t size = adjust_stack_size(base, (size_t)limits.rlim_cur);
+ assert(size >= jt->stack_size(), "Stack size problem in main thread");
+ )
+ tty->print_cr(
+ "Stack size of %d Kb exceeds current limit of %d Kb.\n"
+ "(Stack sizes are rounded up to a multiple of the system page size.)\n"
+ "See limit(1) to increase the stack size limit.",
+ stack_size / K, jt->stack_size() / K);
+ vm_exit(1);
+ }
+ assert(jt->stack_size() >= stack_size,
+ "Attempt to map more stack than was allocated");
+ jt->set_stack_size(stack_size);
+ }
+
+ // 5/22/01: Right now alternate signal stacks do not handle
+ // throwing stack overflow exceptions, see bug 4463178
+ // Until a fix is found for this, T2 will NOT imply alternate signal
+ // stacks.
+ // If using T2 libthread threads, install an alternate signal stack.
+ // Because alternate stacks associate with LWPs on Solaris,
+ // see sigaltstack(2), if using UNBOUND threads, or if UseBoundThreads
+ // we prefer to explicitly stack bang.
+ // If not using T2 libthread, but using UseBoundThreads any threads
+ // (primordial thread, jni_attachCurrentThread) we do not create,
+ // probably are not bound, therefore they can not have an alternate
+ // signal stack. Since our stack banging code is generated and
+ // is shared across threads, all threads must be bound to allow
+ // using alternate signal stacks. The alternative is to interpose
+ // on _lwp_create to associate an alt sig stack with each LWP,
+ // and this could be a problem when the JVM is embedded.
+ // We would prefer to use alternate signal stacks with T2
+ // Since there is currently no accurate way to detect T2
+ // we do not. Assuming T2 when running T1 causes sig 11s or assertions
+ // on installing alternate signal stacks
+
+
+ // 05/09/03: removed alternate signal stack support for Solaris
+ // The alternate signal stack mechanism is no longer needed to
+ // handle stack overflow. This is now handled by allocating
+ // guard pages (red zone) and stackbanging.
+ // Initially the alternate signal stack mechanism was removed because
+ // it did not work with T1 llibthread. Alternate
+ // signal stacks MUST have all threads bound to lwps. Applications
+ // can create their own threads and attach them without their being
+ // bound under T1. This is frequently the case for the primordial thread.
+ // If we were ever to reenable this mechanism we would need to
+ // use the dynamic check for T2 libthread.
+
+ os::Solaris::init_thread_fpu_state();
+}
+
+
+
+// Free Solaris resources related to the OSThread
+void os::free_thread(OSThread* osthread) {
+ assert(osthread != NULL, "os::free_thread but osthread not set");
+
+
+ // We are told to free resources of the argument thread,
+ // but we can only really operate on the current thread.
+ // The main thread must take the VMThread down synchronously
+ // before the main thread exits and frees up CodeHeap
+ guarantee((Thread::current()->osthread() == osthread
+ || (osthread == VMThread::vm_thread()->osthread())), "os::free_thread but not current thread");
+ if (Thread::current()->osthread() == osthread) {
+ // Restore caller's signal mask
+ sigset_t sigmask = osthread->caller_sigmask();
+ thr_sigsetmask(SIG_SETMASK, &sigmask, NULL);
+ }
+ delete osthread;
+}
+
+void os::pd_start_thread(Thread* thread) {
+ int status = thr_continue(thread->osthread()->thread_id());
+ assert_status(status == 0, status, "thr_continue failed");
+}
+
+
+intx os::current_thread_id() {
+ return (intx)thr_self();
+}
+
+static pid_t _initial_pid = 0;
+
+int os::current_process_id() {
+ return (int)(_initial_pid ? _initial_pid : getpid());
+}
+
+int os::allocate_thread_local_storage() {
+ // %%% in Win32 this allocates a memory segment pointed to by a
+ // register. Dan Stein can implement a similar feature in
+ // Solaris. Alternatively, the VM can do the same thing
+ // explicitly: malloc some storage and keep the pointer in a
+ // register (which is part of the thread's context) (or keep it
+ // in TLS).
+ // %%% In current versions of Solaris, thr_self and TSD can
+ // be accessed via short sequences of displaced indirections.
+ // The value of thr_self is available as %g7(36).
+ // The value of thr_getspecific(k) is stored in %g7(12)(4)(k*4-4),
+ // assuming that the current thread already has a value bound to k.
+ // It may be worth experimenting with such access patterns,
+ // and later having the parameters formally exported from a Solaris
+ // interface. I think, however, that it will be faster to
+ // maintain the invariant that %g2 always contains the
+ // JavaThread in Java code, and have stubs simply
+ // treat %g2 as a caller-save register, preserving it in a %lN.
+ thread_key_t tk;
+ if (thr_keycreate( &tk, NULL ) )
+ fatal1("os::allocate_thread_local_storage: thr_keycreate failed (%s)", strerror(errno));
+ return int(tk);
+}
+
+void os::free_thread_local_storage(int index) {
+ // %%% don't think we need anything here
+ // if ( pthread_key_delete((pthread_key_t) tk) )
+ // fatal("os::free_thread_local_storage: pthread_key_delete failed");
+}
+
+#define SMALLINT 32 // libthread allocate for tsd_common is a version specific
+ // small number - point is NO swap space available
+void os::thread_local_storage_at_put(int index, void* value) {
+ // %%% this is used only in threadLocalStorage.cpp
+ if (thr_setspecific((thread_key_t)index, value)) {
+ if (errno == ENOMEM) {
+ vm_exit_out_of_memory(SMALLINT, "thr_setspecific: out of swap space");
+ } else {
+ fatal1("os::thread_local_storage_at_put: thr_setspecific failed (%s)", strerror(errno));
+ }
+ } else {
+ ThreadLocalStorage::set_thread_in_slot ((Thread *) value) ;
+ }
+}
+
+// This function could be called before TLS is initialized, for example, when
+// VM receives an async signal or when VM causes a fatal error during
+// initialization. Return NULL if thr_getspecific() fails.
+void* os::thread_local_storage_at(int index) {
+ // %%% this is used only in threadLocalStorage.cpp
+ void* r = NULL;
+ return thr_getspecific((thread_key_t)index, &r) != 0 ? NULL : r;
+}
+
+
+const int NANOSECS_PER_MILLISECS = 1000000;
+// gethrtime can move backwards if read from one cpu and then a different cpu
+// getTimeNanos is guaranteed to not move backward on Solaris
+// local spinloop created as faster for a CAS on an int than
+// a CAS on a 64bit jlong. Also Atomic::cmpxchg for jlong is not
+// supported on sparc v8 or pre supports_cx8 intel boxes.
+// oldgetTimeNanos for systems which do not support CAS on 64bit jlong
+// i.e. sparc v8 and pre supports_cx8 (i486) intel boxes
+inline hrtime_t oldgetTimeNanos() {
+ int gotlock = LOCK_INVALID;
+ hrtime_t newtime = gethrtime();
+
+ for (;;) {
+// grab lock for max_hrtime
+ int curlock = max_hrtime_lock;
+ if (curlock & LOCK_BUSY) continue;
+ if (gotlock = Atomic::cmpxchg(LOCK_BUSY, &max_hrtime_lock, LOCK_FREE) != LOCK_FREE) continue;
+ if (newtime > max_hrtime) {
+ max_hrtime = newtime;
+ } else {
+ newtime = max_hrtime;
+ }
+ // release lock
+ max_hrtime_lock = LOCK_FREE;
+ return newtime;
+ }
+}
+// gethrtime can move backwards if read from one cpu and then a different cpu
+// getTimeNanos is guaranteed to not move backward on Solaris
+inline hrtime_t getTimeNanos() {
+ if (VM_Version::supports_cx8()) {
+ bool retry = false;
+ hrtime_t newtime = gethrtime();
+ hrtime_t oldmaxtime = max_hrtime;
+ hrtime_t retmaxtime = oldmaxtime;
+ while ((newtime > retmaxtime) && (retry == false || retmaxtime != oldmaxtime)) {
+ oldmaxtime = retmaxtime;
+ retmaxtime = Atomic::cmpxchg(newtime, (volatile jlong *)&max_hrtime, oldmaxtime);
+ retry = true;
+ }
+ return (newtime > retmaxtime) ? newtime : retmaxtime;
+ } else {
+ return oldgetTimeNanos();
+ }
+}
+
+// Time since start-up in seconds to a fine granularity.
+// Used by VMSelfDestructTimer and the MemProfiler.
+double os::elapsedTime() {
+ return (double)(getTimeNanos() - first_hrtime) / (double)hrtime_hz;
+}
+
+jlong os::elapsed_counter() {
+ return (jlong)(getTimeNanos() - first_hrtime);
+}
+
+jlong os::elapsed_frequency() {
+ return hrtime_hz;
+}
+
+// Return the real, user, and system times in seconds from an
+// arbitrary fixed point in the past.
+bool os::getTimesSecs(double* process_real_time,
+ double* process_user_time,
+ double* process_system_time) {
+ struct tms ticks;
+ clock_t real_ticks = times(&ticks);
+
+ if (real_ticks == (clock_t) (-1)) {
+ return false;
+ } else {
+ double ticks_per_second = (double) clock_tics_per_sec;
+ *process_user_time = ((double) ticks.tms_utime) / ticks_per_second;
+ *process_system_time = ((double) ticks.tms_stime) / ticks_per_second;
+ // For consistency return the real time from getTimeNanos()
+ // converted to seconds.
+ *process_real_time = ((double) getTimeNanos()) / ((double) NANOUNITS);
+
+ return true;
+ }
+}
+
+// Used internally for comparisons only
+// getTimeMillis guaranteed to not move backwards on Solaris
+jlong getTimeMillis() {
+ jlong nanotime = getTimeNanos();
+ return (jlong)(nanotime / NANOSECS_PER_MILLISECS);
+}
+
+jlong os::timeofday() {
+ timeval t;
+ if (gettimeofday( &t, NULL) == -1)
+ fatal1("timeofday: gettimeofday (%s)", strerror(errno));
+ return jlong(t.tv_sec) * 1000 + jlong(t.tv_usec) / 1000;
+}
+
+// Must return millis since Jan 1 1970 for JVM_CurrentTimeMillis
+// _use_global_time is only set if CacheTimeMillis is true
+jlong os::javaTimeMillis() {
+ return (_use_global_time ? read_global_time() : timeofday());
+}
+
+jlong os::javaTimeNanos() {
+ return (jlong)getTimeNanos();
+}
+
+void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) {
+ info_ptr->max_value = ALL_64_BITS; // gethrtime() uses all 64 bits
+ info_ptr->may_skip_backward = false; // not subject to resetting or drifting
+ info_ptr->may_skip_forward = false; // not subject to resetting or drifting
+ info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time
+}
+
+char * os::local_time_string(char *buf, size_t buflen) {
+ struct tm t;
+ time_t long_time;
+ time(&long_time);
+ localtime_r(&long_time, &t);
+ jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d",
+ t.tm_year + 1900, t.tm_mon + 1, t.tm_mday,
+ t.tm_hour, t.tm_min, t.tm_sec);
+ return buf;
+}
+
+// Note: os::shutdown() might be called very early during initialization, or
+// called from signal handler. Before adding something to os::shutdown(), make
+// sure it is async-safe and can handle partially initialized VM.
+void os::shutdown() {
+
+ // allow PerfMemory to attempt cleanup of any persistent resources
+ perfMemory_exit();
+
+ // needs to remove object in file system
+ AttachListener::abort();
+
+ // flush buffered output, finish log files
+ ostream_abort();
+
+ // Check for abort hook
+ abort_hook_t abort_hook = Arguments::abort_hook();
+ if (abort_hook != NULL) {
+ abort_hook();
+ }
+}
+
+// Note: os::abort() might be called very early during initialization, or
+// called from signal handler. Before adding something to os::abort(), make
+// sure it is async-safe and can handle partially initialized VM.
+void os::abort(bool dump_core) {
+ os::shutdown();
+ if (dump_core) {
+#ifndef PRODUCT
+ fdStream out(defaultStream::output_fd());
+ out.print_raw("Current thread is ");
+ char buf[16];
+ jio_snprintf(buf, sizeof(buf), UINTX_FORMAT, os::current_thread_id());
+ out.print_raw_cr(buf);
+ out.print_raw_cr("Dumping core ...");
+#endif
+ ::abort(); // dump core (for debugging)
+ }
+
+ ::exit(1);
+}
+
+// Die immediately, no exit hook, no abort hook, no cleanup.
+void os::die() {
+ _exit(-1);
+}
+
+// unused
+void os::set_error_file(const char *logfile) {}
+
+// DLL functions
+
+const char* os::dll_file_extension() { return ".so"; }
+
+const char* os::get_temp_directory() { return "/tmp/"; }
+
+const char* os::get_current_directory(char *buf, int buflen) {
+ return getcwd(buf, buflen);
+}
+
+// check if addr is inside libjvm[_g].so
+bool os::address_is_in_vm(address addr) {
+ static address libjvm_base_addr;
+ Dl_info dlinfo;
+
+ if (libjvm_base_addr == NULL) {
+ dladdr(CAST_FROM_FN_PTR(void *, os::address_is_in_vm), &dlinfo);
+ libjvm_base_addr = (address)dlinfo.dli_fbase;
+ assert(libjvm_base_addr !=NULL, "Cannot obtain base address for libjvm");
+ }
+
+ if (dladdr((void *)addr, &dlinfo)) {
+ if (libjvm_base_addr == (address)dlinfo.dli_fbase) return true;
+ }
+
+ return false;
+}
+
+typedef int (*dladdr1_func_type) (void *, Dl_info *, void **, int);
+static dladdr1_func_type dladdr1_func = NULL;
+
+bool os::dll_address_to_function_name(address addr, char *buf,
+ int buflen, int * offset) {
+ Dl_info dlinfo;
+
+ // dladdr1_func was initialized in os::init()
+ if (dladdr1_func){
+ // yes, we have dladdr1
+
+ // Support for dladdr1 is checked at runtime; it may be
+ // available even if the vm is built on a machine that does
+ // not have dladdr1 support. Make sure there is a value for
+ // RTLD_DL_SYMENT.
+ #ifndef RTLD_DL_SYMENT
+ #define RTLD_DL_SYMENT 1
+ #endif
+ Sym * info;
+ if (dladdr1_func((void *)addr, &dlinfo, (void **)&info,
+ RTLD_DL_SYMENT)) {
+ if (buf) jio_snprintf(buf, buflen, "%s", dlinfo.dli_sname);
+ if (offset) *offset = addr - (address)dlinfo.dli_saddr;
+
+ // check if the returned symbol really covers addr
+ return ((char *)dlinfo.dli_saddr + info->st_size > (char *)addr);
+ } else {
+ if (buf) buf[0] = '\0';
+ if (offset) *offset = -1;
+ return false;
+ }
+ } else {
+ // no, only dladdr is available
+ if(dladdr((void *)addr, &dlinfo)) {
+ if (buf) jio_snprintf(buf, buflen, dlinfo.dli_sname);
+ if (offset) *offset = addr - (address)dlinfo.dli_saddr;
+ return true;
+ } else {
+ if (buf) buf[0] = '\0';
+ if (offset) *offset = -1;
+ return false;
+ }
+ }
+}
+
+bool os::dll_address_to_library_name(address addr, char* buf,
+ int buflen, int* offset) {
+ Dl_info dlinfo;
+
+ if (dladdr((void*)addr, &dlinfo)){
+ if (buf) jio_snprintf(buf, buflen, "%s", dlinfo.dli_fname);
+ if (offset) *offset = addr - (address)dlinfo.dli_fbase;
+ return true;
+ } else {
+ if (buf) buf[0] = '\0';
+ if (offset) *offset = -1;
+ return false;
+ }
+}
+
+// Prints the names and full paths of all opened dynamic libraries
+// for current process
+void os::print_dll_info(outputStream * st) {
+ Dl_info dli;
+ void *handle;
+ Link_map *map;
+ Link_map *p;
+
+ st->print_cr("Dynamic libraries:"); st->flush();
+
+ if (!dladdr(CAST_FROM_FN_PTR(void *, os::print_dll_info), &dli)) {
+ st->print_cr("Error: Cannot print dynamic libraries.");
+ return;
+ }
+ handle = dlopen(dli.dli_fname, RTLD_LAZY);
+ if (handle == NULL) {
+ st->print_cr("Error: Cannot print dynamic libraries.");
+ return;
+ }
+ dlinfo(handle, RTLD_DI_LINKMAP, &map);
+ if (map == NULL) {
+ st->print_cr("Error: Cannot print dynamic libraries.");
+ return;
+ }
+
+ while (map->l_prev != NULL)
+ map = map->l_prev;
+
+ while (map != NULL) {
+ st->print_cr(PTR_FORMAT " \t%s", map->l_addr, map->l_name);
+ map = map->l_next;
+ }
+
+ dlclose(handle);
+}
+
+ // Loads .dll/.so and
+ // in case of error it checks if .dll/.so was built for the
+ // same architecture as Hotspot is running on
+
+void * os::dll_load(const char *filename, char *ebuf, int ebuflen)
+{
+ void * result= ::dlopen(filename, RTLD_LAZY);
+ if (result != NULL) {
+ // Successful loading
+ return result;
+ }
+
+ Elf32_Ehdr elf_head;
+
+ // Read system error message into ebuf
+ // It may or may not be overwritten below
+ ::strncpy(ebuf, ::dlerror(), ebuflen-1);
+ ebuf[ebuflen-1]='\0';
+ int diag_msg_max_length=ebuflen-strlen(ebuf);
+ char* diag_msg_buf=ebuf+strlen(ebuf);
+
+ if (diag_msg_max_length==0) {
+ // No more space in ebuf for additional diagnostics message
+ return NULL;
+ }
+
+
+ int file_descriptor= ::open(filename, O_RDONLY | O_NONBLOCK);
+
+ if (file_descriptor < 0) {
+ // Can't open library, report dlerror() message
+ return NULL;
+ }
+
+ bool failed_to_read_elf_head=
+ (sizeof(elf_head)!=
+ (::read(file_descriptor, &elf_head,sizeof(elf_head)))) ;
+
+ ::close(file_descriptor);
+ if (failed_to_read_elf_head) {
+ // file i/o error - report dlerror() msg
+ return NULL;
+ }
+
+ typedef struct {
+ Elf32_Half code; // Actual value as defined in elf.h
+ Elf32_Half compat_class; // Compatibility of archs at VM's sense
+ char elf_class; // 32 or 64 bit
+ char endianess; // MSB or LSB
+ char* name; // String representation
+ } arch_t;
+
+ static const arch_t arch_array[]={
+ {EM_386, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"},
+ {EM_486, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"},
+ {EM_IA_64, EM_IA_64, ELFCLASS64, ELFDATA2LSB, (char*)"IA 64"},
+ {EM_X86_64, EM_X86_64, ELFCLASS64, ELFDATA2LSB, (char*)"AMD 64"},
+ {EM_SPARC, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"},
+ {EM_SPARC32PLUS, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"},
+ {EM_SPARCV9, EM_SPARCV9, ELFCLASS64, ELFDATA2MSB, (char*)"Sparc v9 64"},
+ {EM_PPC, EM_PPC, ELFCLASS32, ELFDATA2MSB, (char*)"Power PC 32"},
+ {EM_PPC64, EM_PPC64, ELFCLASS64, ELFDATA2MSB, (char*)"Power PC 64"}
+ };
+
+ #if (defined IA32)
+ static Elf32_Half running_arch_code=EM_386;
+ #elif (defined AMD64)
+ static Elf32_Half running_arch_code=EM_X86_64;
+ #elif (defined IA64)
+ static Elf32_Half running_arch_code=EM_IA_64;
+ #elif (defined __sparc) && (defined _LP64)
+ static Elf32_Half running_arch_code=EM_SPARCV9;
+ #elif (defined __sparc) && (!defined _LP64)
+ static Elf32_Half running_arch_code=EM_SPARC;
+ #elif (defined __powerpc64__)
+ static Elf32_Half running_arch_code=EM_PPC64;
+ #elif (defined __powerpc__)
+ static Elf32_Half running_arch_code=EM_PPC;
+ #else
+ #error Method os::dll_load requires that one of following is defined:\
+ IA32, AMD64, IA64, __sparc, __powerpc__
+ #endif
+
+ // Identify compatability class for VM's architecture and library's architecture
+ // Obtain string descriptions for architectures
+
+ arch_t lib_arch={elf_head.e_machine,0,elf_head.e_ident[EI_CLASS], elf_head.e_ident[EI_DATA], NULL};
+ int running_arch_index=-1;
+
+ for (unsigned int i=0 ; i < ARRAY_SIZE(arch_array) ; i++ ) {
+ if (running_arch_code == arch_array[i].code) {
+ running_arch_index = i;
+ }
+ if (lib_arch.code == arch_array[i].code) {
+ lib_arch.compat_class = arch_array[i].compat_class;
+ lib_arch.name = arch_array[i].name;
+ }
+ }
+
+ assert(running_arch_index != -1,
+ "Didn't find running architecture code (running_arch_code) in arch_array");
+ if (running_arch_index == -1) {
+ // Even though running architecture detection failed
+ // we may still continue with reporting dlerror() message
+ return NULL;
+ }
+
+ if (lib_arch.endianess != arch_array[running_arch_index].endianess) {
+ ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: endianness mismatch)");
+ return NULL;
+ }
+
+ if (lib_arch.elf_class != arch_array[running_arch_index].elf_class) {
+ ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: architecture word width mismatch)");
+ return NULL;
+ }
+
+ if (lib_arch.compat_class != arch_array[running_arch_index].compat_class) {
+ if ( lib_arch.name!=NULL ) {
+ ::snprintf(diag_msg_buf, diag_msg_max_length-1,
+ " (Possible cause: can't load %s-bit .so on a %s-bit platform)",
+ lib_arch.name, arch_array[running_arch_index].name);
+ } else {
+ ::snprintf(diag_msg_buf, diag_msg_max_length-1,
+ " (Possible cause: can't load this .so (machine code=0x%x) on a %s-bit platform)",
+ lib_arch.code,
+ arch_array[running_arch_index].name);
+ }
+ }
+
+ return NULL;
+}
+
+
+
+bool _print_ascii_file(const char* filename, outputStream* st) {
+ int fd = open(filename, O_RDONLY);
+ if (fd == -1) {
+ return false;
+ }
+
+ char buf[32];
+ int bytes;
+ while ((bytes = read(fd, buf, sizeof(buf))) > 0) {
+ st->print_raw(buf, bytes);
+ }
+
+ close(fd);
+
+ return true;
+}
+
+void os::print_os_info(outputStream* st) {
+ st->print("OS:");
+
+ if (!_print_ascii_file("/etc/release", st)) {
+ st->print("Solaris");
+ }
+ st->cr();
+
+ // kernel
+ st->print("uname:");
+ struct utsname name;
+ uname(&name);
+ st->print(name.sysname); st->print(" ");
+ st->print(name.release); st->print(" ");
+ st->print(name.version); st->print(" ");
+ st->print(name.machine);
+
+ // libthread
+ if (os::Solaris::T2_libthread()) st->print(" (T2 libthread)");
+ else st->print(" (T1 libthread)");
+ st->cr();
+
+ // rlimit
+ st->print("rlimit:");
+ struct rlimit rlim;
+
+ st->print(" STACK ");
+ getrlimit(RLIMIT_STACK, &rlim);
+ if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity");
+ else st->print("%uk", rlim.rlim_cur >> 10);
+
+ st->print(", CORE ");
+ getrlimit(RLIMIT_CORE, &rlim);
+ if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity");
+ else st->print("%uk", rlim.rlim_cur >> 10);
+
+ st->print(", NOFILE ");
+ getrlimit(RLIMIT_NOFILE, &rlim);
+ if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity");
+ else st->print("%d", rlim.rlim_cur);
+
+ st->print(", AS ");
+ getrlimit(RLIMIT_AS, &rlim);
+ if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity");
+ else st->print("%uk", rlim.rlim_cur >> 10);
+ st->cr();
+
+ // load average
+ st->print("load average:");
+ double loadavg[3];
+ os::loadavg(loadavg, 3);
+ st->print("%0.02f %0.02f %0.02f", loadavg[0], loadavg[1], loadavg[2]);
+ st->cr();
+}
+
+
+static bool check_addr0(outputStream* st) {
+ jboolean status = false;
+ int fd = open("/proc/self/map",O_RDONLY);
+ if (fd >= 0) {
+ prmap_t p;
+ while(read(fd, &p, sizeof(p)) > 0) {
+ if (p.pr_vaddr == 0x0) {
+ st->print("Warning: Address: 0x%x, Size: %dK, ",p.pr_vaddr, p.pr_size/1024, p.pr_mapname);
+ st->print("Mapped file: %s, ", p.pr_mapname[0] == '\0' ? "None" : p.pr_mapname);
+ st->print("Access:");
+ st->print("%s",(p.pr_mflags & MA_READ) ? "r" : "-");
+ st->print("%s",(p.pr_mflags & MA_WRITE) ? "w" : "-");
+ st->print("%s",(p.pr_mflags & MA_EXEC) ? "x" : "-");
+ st->cr();
+ status = true;
+ }
+ close(fd);
+ }
+ }
+ return status;
+}
+
+void os::print_memory_info(outputStream* st) {
+ st->print("Memory:");
+ st->print(" %dk page", os::vm_page_size()>>10);
+ st->print(", physical " UINT64_FORMAT "k", os::physical_memory()>>10);
+ st->print("(" UINT64_FORMAT "k free)", os::available_memory() >> 10);
+ st->cr();
+ (void) check_addr0(st);
+}
+
+// Taken from /usr/include/sys/machsig.h Supposed to be architecture specific
+// but they're the same for all the solaris architectures that we support.
+const char *ill_names[] = { "ILL0", "ILL_ILLOPC", "ILL_ILLOPN", "ILL_ILLADR",
+ "ILL_ILLTRP", "ILL_PRVOPC", "ILL_PRVREG",
+ "ILL_COPROC", "ILL_BADSTK" };
+
+const char *fpe_names[] = { "FPE0", "FPE_INTDIV", "FPE_INTOVF", "FPE_FLTDIV",
+ "FPE_FLTOVF", "FPE_FLTUND", "FPE_FLTRES",
+ "FPE_FLTINV", "FPE_FLTSUB" };
+
+const char *segv_names[] = { "SEGV0", "SEGV_MAPERR", "SEGV_ACCERR" };
+
+const char *bus_names[] = { "BUS0", "BUS_ADRALN", "BUS_ADRERR", "BUS_OBJERR" };
+
+void os::print_siginfo(outputStream* st, void* siginfo) {
+ st->print("siginfo:");
+
+ const int buflen = 100;
+ char buf[buflen];
+ siginfo_t *si = (siginfo_t*)siginfo;
+ st->print("si_signo=%s: ", os::exception_name(si->si_signo, buf, buflen));
+ char *err = strerror(si->si_errno);
+ if (si->si_errno != 0 && err != NULL) {
+ st->print("si_errno=%s", err);
+ } else {
+ st->print("si_errno=%d", si->si_errno);
+ }
+ const int c = si->si_code;
+ assert(c > 0, "unexpected si_code");
+ switch (si->si_signo) {
+ case SIGILL:
+ st->print(", si_code=%d (%s)", c, c > 8 ? "" : ill_names[c]);
+ st->print(", si_addr=" PTR_FORMAT, si->si_addr);
+ break;
+ case SIGFPE:
+ st->print(", si_code=%d (%s)", c, c > 9 ? "" : fpe_names[c]);
+ st->print(", si_addr=" PTR_FORMAT, si->si_addr);
+ break;
+ case SIGSEGV:
+ st->print(", si_code=%d (%s)", c, c > 2 ? "" : segv_names[c]);
+ st->print(", si_addr=" PTR_FORMAT, si->si_addr);
+ break;
+ case SIGBUS:
+ st->print(", si_code=%d (%s)", c, c > 3 ? "" : bus_names[c]);
+ st->print(", si_addr=" PTR_FORMAT, si->si_addr);
+ break;
+ default:
+ st->print(", si_code=%d", si->si_code);
+ // no si_addr
+ }
+
+ if ((si->si_signo == SIGBUS || si->si_signo == SIGSEGV) &&
+ UseSharedSpaces) {
+ FileMapInfo* mapinfo = FileMapInfo::current_info();
+ if (mapinfo->is_in_shared_space(si->si_addr)) {
+ st->print("\n\nError accessing class data sharing archive." \
+ " Mapped file inaccessible during execution, " \
+ " possible disk/network problem.");
+ }
+ }
+ st->cr();
+}
+
+// Moved from whole group, because we need them here for diagnostic
+// prints.
+#define OLDMAXSIGNUM 32
+static int Maxsignum = 0;
+static int *ourSigFlags = NULL;
+
+extern "C" void sigINTRHandler(int, siginfo_t*, void*);
+
+int os::Solaris::get_our_sigflags(int sig) {
+ assert(ourSigFlags!=NULL, "signal data structure not initialized");
+ assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range");
+ return ourSigFlags[sig];
+}
+
+void os::Solaris::set_our_sigflags(int sig, int flags) {
+ assert(ourSigFlags!=NULL, "signal data structure not initialized");
+ assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range");
+ ourSigFlags[sig] = flags;
+}
+
+
+static const char* get_signal_handler_name(address handler,
+ char* buf, int buflen) {
+ int offset;
+ bool found = os::dll_address_to_library_name(handler, buf, buflen, &offset);
+ if (found) {
+ // skip directory names
+ const char *p1, *p2;
+ p1 = buf;
+ size_t len = strlen(os::file_separator());
+ while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len;
+ jio_snprintf(buf, buflen, "%s+0x%x", p1, offset);
+ } else {
+ jio_snprintf(buf, buflen, PTR_FORMAT, handler);
+ }
+ return buf;
+}
+
+static void print_signal_handler(outputStream* st, int sig,
+ char* buf, size_t buflen) {
+ struct sigaction sa;
+
+ sigaction(sig, NULL, &sa);
+
+ st->print("%s: ", os::exception_name(sig, buf, buflen));
+
+ address handler = (sa.sa_flags & SA_SIGINFO)
+ ? CAST_FROM_FN_PTR(address, sa.sa_sigaction)
+ : CAST_FROM_FN_PTR(address, sa.sa_handler);
+
+ if (handler == CAST_FROM_FN_PTR(address, SIG_DFL)) {
+ st->print("SIG_DFL");
+ } else if (handler == CAST_FROM_FN_PTR(address, SIG_IGN)) {
+ st->print("SIG_IGN");
+ } else {
+ st->print("[%s]", get_signal_handler_name(handler, buf, buflen));
+ }
+
+ st->print(", sa_mask[0]=" PTR32_FORMAT, *(uint32_t*)&sa.sa_mask);
+
+ address rh = VMError::get_resetted_sighandler(sig);
+ // May be, handler was resetted by VMError?
+ if(rh != NULL) {
+ handler = rh;
+ sa.sa_flags = VMError::get_resetted_sigflags(sig);
+ }
+
+ st->print(", sa_flags=" PTR32_FORMAT, sa.sa_flags);
+
+ // Check: is it our handler?
+ if(handler == CAST_FROM_FN_PTR(address, signalHandler) ||
+ handler == CAST_FROM_FN_PTR(address, sigINTRHandler)) {
+ // It is our signal handler
+ // check for flags
+ if(sa.sa_flags != os::Solaris::get_our_sigflags(sig)) {
+ st->print(
+ ", flags was changed from " PTR32_FORMAT ", consider using jsig library",
+ os::Solaris::get_our_sigflags(sig));
+ }
+ }
+ st->cr();
+}
+
+void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) {
+ st->print_cr("Signal Handlers:");
+ print_signal_handler(st, SIGSEGV, buf, buflen);
+ print_signal_handler(st, SIGBUS , buf, buflen);
+ print_signal_handler(st, SIGFPE , buf, buflen);
+ print_signal_handler(st, SIGPIPE, buf, buflen);
+ print_signal_handler(st, SIGXFSZ, buf, buflen);
+ print_signal_handler(st, SIGILL , buf, buflen);
+ print_signal_handler(st, INTERRUPT_SIGNAL, buf, buflen);
+ print_signal_handler(st, ASYNC_SIGNAL, buf, buflen);
+ print_signal_handler(st, BREAK_SIGNAL, buf, buflen);
+ print_signal_handler(st, SHUTDOWN1_SIGNAL , buf, buflen);
+ print_signal_handler(st, SHUTDOWN2_SIGNAL , buf, buflen);
+ print_signal_handler(st, SHUTDOWN3_SIGNAL, buf, buflen);
+ print_signal_handler(st, os::Solaris::SIGinterrupt(), buf, buflen);
+ print_signal_handler(st, os::Solaris::SIGasync(), buf, buflen);
+}
+
+static char saved_jvm_path[MAXPATHLEN] = { 0 };
+
+// Find the full path to the current module, libjvm.so or libjvm_g.so
+void os::jvm_path(char *buf, jint buflen) {
+ // Error checking.
+ if (buflen < MAXPATHLEN) {
+ assert(false, "must use a large-enough buffer");
+ buf[0] = '\0';
+ return;
+ }
+ // Lazy resolve the path to current module.
+ if (saved_jvm_path[0] != 0) {
+ strcpy(buf, saved_jvm_path);
+ return;
+ }
+
+ Dl_info dlinfo;
+ int ret = dladdr(CAST_FROM_FN_PTR(void *, os::jvm_path), &dlinfo);
+ assert(ret != 0, "cannot locate libjvm");
+ realpath((char *)dlinfo.dli_fname, buf);
+
+ if (strcmp(Arguments::sun_java_launcher(), "gamma") == 0) {
+ // Support for the gamma launcher. Typical value for buf is
+ // "<JAVA_HOME>/jre/lib/<arch>/<vmtype>/libjvm.so". If "/jre/lib/" appears at
+ // the right place in the string, then assume we are installed in a JDK and
+ // we're done. Otherwise, check for a JAVA_HOME environment variable and fix
+ // up the path so it looks like libjvm.so is installed there (append a
+ // fake suffix hotspot/libjvm.so).
+ const char *p = buf + strlen(buf) - 1;
+ for (int count = 0; p > buf && count < 5; ++count) {
+ for (--p; p > buf && *p != '/'; --p)
+ /* empty */ ;
+ }
+
+ if (strncmp(p, "/jre/lib/", 9) != 0) {
+ // Look for JAVA_HOME in the environment.
+ char* java_home_var = ::getenv("JAVA_HOME");
+ if (java_home_var != NULL && java_home_var[0] != 0) {
+ char cpu_arch[12];
+ sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch));
+#ifdef _LP64
+ // If we are on sparc running a 64-bit vm, look in jre/lib/sparcv9.
+ if (strcmp(cpu_arch, "sparc") == 0) {
+ strcat(cpu_arch, "v9");
+ } else if (strcmp(cpu_arch, "i386") == 0) {
+ strcpy(cpu_arch, "amd64");
+ }
+#endif
+ // Check the current module name "libjvm.so" or "libjvm_g.so".
+ p = strrchr(buf, '/');
+ assert(strstr(p, "/libjvm") == p, "invalid library name");
+ p = strstr(p, "_g") ? "_g" : "";
+
+ realpath(java_home_var, buf);
+ sprintf(buf + strlen(buf), "/jre/lib/%s", cpu_arch);
+ if (0 == access(buf, F_OK)) {
+ // Use current module name "libjvm[_g].so" instead of
+ // "libjvm"debug_only("_g")".so" since for fastdebug version
+ // we should have "libjvm.so" but debug_only("_g") adds "_g"!
+ // It is used when we are choosing the HPI library's name
+ // "libhpi[_g].so" in hpi::initialize_get_interface().
+ sprintf(buf + strlen(buf), "/hotspot/libjvm%s.so", p);
+ } else {
+ // Go back to path of .so
+ realpath((char *)dlinfo.dli_fname, buf);
+ }
+ }
+ }
+ }
+
+ strcpy(saved_jvm_path, buf);
+}
+
+
+void os::print_jni_name_prefix_on(outputStream* st, int args_size) {
+ // no prefix required, not even "_"
+}
+
+
+void os::print_jni_name_suffix_on(outputStream* st, int args_size) {
+ // no suffix required
+}
+
+
+// sun.misc.Signal
+
+extern "C" {
+ static void UserHandler(int sig, void *siginfo, void *context) {
+ // Ctrl-C is pressed during error reporting, likely because the error
+ // handler fails to abort. Let VM die immediately.
+ if (sig == SIGINT && is_error_reported()) {
+ os::die();
+ }
+
+ os::signal_notify(sig);
+ // We do not need to reinstate the signal handler each time...
+ }
+}
+
+void* os::user_handler() {
+ return CAST_FROM_FN_PTR(void*, UserHandler);
+}
+
+extern "C" {
+ typedef void (*sa_handler_t)(int);
+ typedef void (*sa_sigaction_t)(int, siginfo_t *, void *);
+}
+
+void* os::signal(int signal_number, void* handler) {
+ struct sigaction sigAct, oldSigAct;
+ sigfillset(&(sigAct.sa_mask));
+ sigAct.sa_flags = SA_RESTART & ~SA_RESETHAND;
+ sigAct.sa_handler = CAST_TO_FN_PTR(sa_handler_t, handler);
+
+ if (sigaction(signal_number, &sigAct, &oldSigAct))
+ // -1 means registration failed
+ return (void *)-1;
+
+ return CAST_FROM_FN_PTR(void*, oldSigAct.sa_handler);
+}
+
+void os::signal_raise(int signal_number) {
+ raise(signal_number);
+}
+
+/*
+ * The following code is moved from os.cpp for making this
+ * code platform specific, which it is by its very nature.
+ */
+
+// a counter for each possible signal value
+static int Sigexit = 0;
+static int Maxlibjsigsigs;
+static jint *pending_signals = NULL;
+static int *preinstalled_sigs = NULL;
+static struct sigaction *chainedsigactions = NULL;
+static sema_t sig_sem;
+typedef int (*version_getting_t)();
+version_getting_t os::Solaris::get_libjsig_version = NULL;
+static int libjsigversion = NULL;
+
+int os::sigexitnum_pd() {
+ assert(Sigexit > 0, "signal memory not yet initialized");
+ return Sigexit;
+}
+
+void os::Solaris::init_signal_mem() {
+ // Initialize signal structures
+ Maxsignum = SIGRTMAX;
+ Sigexit = Maxsignum+1;
+ assert(Maxsignum >0, "Unable to obtain max signal number");
+
+ Maxlibjsigsigs = Maxsignum;
+
+ // pending_signals has one int per signal
+ // The additional signal is for SIGEXIT - exit signal to signal_thread
+ pending_signals = (jint *)os::malloc(sizeof(jint) * (Sigexit+1));
+ memset(pending_signals, 0, (sizeof(jint) * (Sigexit+1)));
+
+ if (UseSignalChaining) {
+ chainedsigactions = (struct sigaction *)malloc(sizeof(struct sigaction)
+ * (Maxsignum + 1));
+ memset(chainedsigactions, 0, (sizeof(struct sigaction) * (Maxsignum + 1)));
+ preinstalled_sigs = (int *)os::malloc(sizeof(int) * (Maxsignum + 1));
+ memset(preinstalled_sigs, 0, (sizeof(int) * (Maxsignum + 1)));
+ }
+ ourSigFlags = (int*)malloc(sizeof(int) * (Maxsignum + 1 ));
+ memset(ourSigFlags, 0, sizeof(int) * (Maxsignum + 1));
+}
+
+void os::signal_init_pd() {
+ int ret;
+
+ ret = ::sema_init(&sig_sem, 0, NULL, NULL);
+ assert(ret == 0, "sema_init() failed");
+}
+
+void os::signal_notify(int signal_number) {
+ int ret;
+
+ Atomic::inc(&pending_signals[signal_number]);
+ ret = ::sema_post(&sig_sem);
+ assert(ret == 0, "sema_post() failed");
+}
+
+static int check_pending_signals(bool wait_for_signal) {
+ int ret;
+ while (true) {
+ for (int i = 0; i < Sigexit + 1; i++) {
+ jint n = pending_signals[i];
+ if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) {
+ return i;
+ }
+ }
+ if (!wait_for_signal) {
+ return -1;
+ }
+ JavaThread *thread = JavaThread::current();
+ ThreadBlockInVM tbivm(thread);
+
+ bool threadIsSuspended;
+ do {
+ thread->set_suspend_equivalent();
+ // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self()
+ while((ret = ::sema_wait(&sig_sem)) == EINTR)
+ ;
+ assert(ret == 0, "sema_wait() failed");
+
+ // were we externally suspended while we were waiting?
+ threadIsSuspended = thread->handle_special_suspend_equivalent_condition();
+ if (threadIsSuspended) {
+ //
+ // The semaphore has been incremented, but while we were waiting
+ // another thread suspended us. We don't want to continue running
+ // while suspended because that would surprise the thread that
+ // suspended us.
+ //
+ ret = ::sema_post(&sig_sem);
+ assert(ret == 0, "sema_post() failed");
+
+ thread->java_suspend_self();
+ }
+ } while (threadIsSuspended);
+ }
+}
+
+int os::signal_lookup() {
+ return check_pending_signals(false);
+}
+
+int os::signal_wait() {
+ return check_pending_signals(true);
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// Virtual Memory
+
+static int page_size = -1;
+
+// The mmap MAP_ALIGN flag is supported on Solaris 9 and later. init_2() will
+// clear this var if support is not available.
+static bool has_map_align = true;
+
+int os::vm_page_size() {
+ assert(page_size != -1, "must call os::init");
+ return page_size;
+}
+
+// Solaris allocates memory by pages.
+int os::vm_allocation_granularity() {
+ assert(page_size != -1, "must call os::init");
+ return page_size;
+}
+
+bool os::commit_memory(char* addr, size_t bytes) {
+ size_t size = bytes;
+ return
+ NULL != Solaris::mmap_chunk(addr, size, MAP_PRIVATE|MAP_FIXED,
+ PROT_READ | PROT_WRITE | PROT_EXEC);
+}
+
+bool os::commit_memory(char* addr, size_t bytes, size_t alignment_hint) {
+ if (commit_memory(addr, bytes)) {
+ if (UseMPSS && alignment_hint > (size_t)vm_page_size()) {
+ // If the large page size has been set and the VM
+ // is using large pages, use the large page size
+ // if it is smaller than the alignment hint. This is
+ // a case where the VM wants to use a larger alignment size
+ // for its own reasons but still want to use large pages
+ // (which is what matters to setting the mpss range.
+ size_t page_size = 0;
+ if (large_page_size() < alignment_hint) {
+ assert(UseLargePages, "Expected to be here for large page use only");
+ page_size = large_page_size();
+ } else {
+ // If the alignment hint is less than the large page
+ // size, the VM wants a particular alignment (thus the hint)
+ // for internal reasons. Try to set the mpss range using
+ // the alignment_hint.
+ page_size = alignment_hint;
+ }
+ // Since this is a hint, ignore any failures.
+ (void)Solaris::set_mpss_range(addr, bytes, page_size);
+ }
+ return true;
+ }
+ return false;
+}
+
+// Uncommit the pages in a specified region.
+void os::free_memory(char* addr, size_t bytes) {
+ if (madvise(addr, bytes, MADV_FREE) < 0) {
+ debug_only(warning("MADV_FREE failed."));
+ return;
+ }
+}
+
+// Change the page size in a given range.
+void os::realign_memory(char *addr, size_t bytes, size_t alignment_hint) {
+ assert((intptr_t)addr % alignment_hint == 0, "Address should be aligned.");
+ assert((intptr_t)(addr + bytes) % alignment_hint == 0, "End should be aligned.");
+ Solaris::set_mpss_range(addr, bytes, alignment_hint);
+}
+
+// Tell the OS to make the range local to the first-touching LWP
+void os::numa_make_local(char *addr, size_t bytes) {
+ assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned.");
+ if (madvise(addr, bytes, MADV_ACCESS_LWP) < 0) {
+ debug_only(warning("MADV_ACCESS_LWP failed."));
+ }
+}
+
+// Tell the OS that this range would be accessed from different LWPs.
+void os::numa_make_global(char *addr, size_t bytes) {
+ assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned.");
+ if (madvise(addr, bytes, MADV_ACCESS_MANY) < 0) {
+ debug_only(warning("MADV_ACCESS_MANY failed."));
+ }
+}
+
+// Get the number of the locality groups.
+size_t os::numa_get_groups_num() {
+ size_t n = Solaris::lgrp_nlgrps(Solaris::lgrp_cookie());
+ return n != -1 ? n : 1;
+}
+
+// Get a list of leaf locality groups. A leaf lgroup is group that
+// doesn't have any children. Typical leaf group is a CPU or a CPU/memory
+// board. An LWP is assigned to one of these groups upon creation.
+size_t os::numa_get_leaf_groups(int *ids, size_t size) {
+ if ((ids[0] = Solaris::lgrp_root(Solaris::lgrp_cookie())) == -1) {
+ ids[0] = 0;
+ return 1;
+ }
+ int result_size = 0, top = 1, bottom = 0, cur = 0;
+ for (int k = 0; k < size; k++) {
+ int r = Solaris::lgrp_children(Solaris::lgrp_cookie(), ids[cur],
+ (Solaris::lgrp_id_t*)&ids[top], size - top);
+ if (r == -1) {
+ ids[0] = 0;
+ return 1;
+ }
+ if (!r) {
+ assert (bottom <= cur, "Sanity check");
+ ids[bottom++] = ids[cur];
+ }
+ top += r;
+ cur++;
+ }
+ return bottom;
+}
+
+// Detect the topology change. Typically happens during CPU pluggin-unplugging.
+bool os::numa_topology_changed() {
+ int is_stale = Solaris::lgrp_cookie_stale(Solaris::lgrp_cookie());
+ if (is_stale != -1 && is_stale) {
+ Solaris::lgrp_fini(Solaris::lgrp_cookie());
+ Solaris::lgrp_cookie_t c = Solaris::lgrp_init(Solaris::LGRP_VIEW_CALLER);
+ assert(c != 0, "Failure to initialize LGRP API");
+ Solaris::set_lgrp_cookie(c);
+ return true;
+ }
+ return false;
+}
+
+// Get the group id of the current LWP.
+int os::numa_get_group_id() {
+ int lgrp_id = os::Solaris::lgrp_home(P_LWPID, P_MYID);
+ if (lgrp_id == -1) {
+ return 0;
+ }
+ return lgrp_id;
+}
+
+// Request information about the page.
+bool os::get_page_info(char *start, page_info* info) {
+ const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE };
+ uint64_t addr = (uintptr_t)start;
+ uint64_t outdata[2];
+ uint_t validity = 0;
+
+ if (os::Solaris::meminfo(&addr, 1, info_types, 2, outdata, &validity) < 0) {
+ return false;
+ }
+
+ info->size = 0;
+ info->lgrp_id = -1;
+
+ if ((validity & 1) != 0) {
+ if ((validity & 2) != 0) {
+ info->lgrp_id = outdata[0];
+ }
+ if ((validity & 4) != 0) {
+ info->size = outdata[1];
+ }
+ return true;
+ }
+ return false;
+}
+
+// Scan the pages from start to end until a page different than
+// the one described in the info parameter is encountered.
+char *os::scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found) {
+ const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE };
+ const size_t types = sizeof(info_types) / sizeof(info_types[0]);
+ uint64_t addrs[MAX_MEMINFO_CNT], outdata[types * MAX_MEMINFO_CNT];
+ uint_t validity[MAX_MEMINFO_CNT];
+
+ size_t page_size = MAX2((size_t)os::vm_page_size(), page_expected->size);
+ uint64_t p = (uint64_t)start;
+ while (p < (uint64_t)end) {
+ addrs[0] = p;
+ size_t addrs_count = 1;
+ while (addrs_count < MAX_MEMINFO_CNT && addrs[addrs_count - 1] < (uint64_t)end) {
+ addrs[addrs_count] = addrs[addrs_count - 1] + page_size;
+ addrs_count++;
+ }
+
+ if (os::Solaris::meminfo(addrs, addrs_count, info_types, types, outdata, validity) < 0) {
+ return NULL;
+ }
+
+ size_t i = 0;
+ for (; i < addrs_count; i++) {
+ if ((validity[i] & 1) != 0) {
+ if ((validity[i] & 4) != 0) {
+ if (outdata[types * i + 1] != page_expected->size) {
+ break;
+ }
+ } else
+ if (page_expected->size != 0) {
+ break;
+ }
+
+ if ((validity[i] & 2) != 0 && page_expected->lgrp_id > 0) {
+ if (outdata[types * i] != page_expected->lgrp_id) {
+ break;
+ }
+ }
+ } else {
+ return NULL;
+ }
+ }
+
+ if (i != addrs_count) {
+ if ((validity[i] & 2) != 0) {
+ page_found->lgrp_id = outdata[types * i];
+ } else {
+ page_found->lgrp_id = -1;
+ }
+ if ((validity[i] & 4) != 0) {
+ page_found->size = outdata[types * i + 1];
+ } else {
+ page_found->size = 0;
+ }
+ return (char*)addrs[i];
+ }
+
+ p = addrs[addrs_count - 1] + page_size;
+ }
+ return end;
+}
+
+bool os::uncommit_memory(char* addr, size_t bytes) {
+ size_t size = bytes;
+ // Map uncommitted pages PROT_NONE so we fail early if we touch an
+ // uncommitted page. Otherwise, the read/write might succeed if we
+ // have enough swap space to back the physical page.
+ return
+ NULL != Solaris::mmap_chunk(addr, size,
+ MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE,
+ PROT_NONE);
+}
+
+char* os::Solaris::mmap_chunk(char *addr, size_t size, int flags, int prot) {
+ char *b = (char *)mmap(addr, size, prot, flags, os::Solaris::_dev_zero_fd, 0);
+
+ if (b == MAP_FAILED) {
+ return NULL;
+ }
+ return b;
+}
+
+char*
+os::reserve_memory(size_t bytes, char* requested_addr, size_t alignment_hint) {
+ char* addr = NULL;
+ int flags;
+
+ flags = MAP_PRIVATE | MAP_NORESERVE;
+ if (requested_addr != NULL) {
+ flags |= MAP_FIXED;
+ addr = requested_addr;
+ } else if (has_map_align && alignment_hint > (size_t) vm_page_size()) {
+ flags |= MAP_ALIGN;
+ addr = (char*) alignment_hint;
+ }
+
+ // Map uncommitted pages PROT_NONE so we fail early if we touch an
+ // uncommitted page. Otherwise, the read/write might succeed if we
+ // have enough swap space to back the physical page.
+ addr = Solaris::mmap_chunk(addr, bytes, flags, PROT_NONE);
+
+ guarantee(requested_addr == NULL || requested_addr == addr,
+ "OS failed to return requested mmap address.");
+
+ return addr;
+}
+
+// Reserve memory at an arbitrary address, only if that area is
+// available (and not reserved for something else).
+
+char* os::attempt_reserve_memory_at(size_t bytes, char* requested_addr) {
+ const int max_tries = 10;
+ char* base[max_tries];
+ size_t size[max_tries];
+
+ // Solaris adds a gap between mmap'ed regions. The size of the gap
+ // is dependent on the requested size and the MMU. Our initial gap
+ // value here is just a guess and will be corrected later.
+ bool had_top_overlap = false;
+ bool have_adjusted_gap = false;
+ size_t gap = 0x400000;
+
+ // Assert only that the size is a multiple of the page size, since
+ // that's all that mmap requires, and since that's all we really know
+ // about at this low abstraction level. If we need higher alignment,
+ // we can either pass an alignment to this method or verify alignment
+ // in one of the methods further up the call chain. See bug 5044738.
+ assert(bytes % os::vm_page_size() == 0, "reserving unexpected size block");
+
+ // Repeatedly allocate blocks until the block is allocated at the
+ // right spot. Give up after max_tries.
+ int i;
+ for (i = 0; i < max_tries; ++i) {
+ base[i] = reserve_memory(bytes);
+
+ if (base[i] != NULL) {
+ // Is this the block we wanted?
+ if (base[i] == requested_addr) {
+ size[i] = bytes;
+ break;
+ }
+
+ // check that the gap value is right
+ if (had_top_overlap && !have_adjusted_gap) {
+ size_t actual_gap = base[i-1] - base[i] - bytes;
+ if (gap != actual_gap) {
+ // adjust the gap value and retry the last 2 allocations
+ assert(i > 0, "gap adjustment code problem");
+ have_adjusted_gap = true; // adjust the gap only once, just in case
+ gap = actual_gap;
+ if (PrintMiscellaneous && Verbose) {
+ warning("attempt_reserve_memory_at: adjusted gap to 0x%lx", gap);
+ }
+ unmap_memory(base[i], bytes);
+ unmap_memory(base[i-1], size[i-1]);
+ i-=2;
+ continue;
+ }
+ }
+
+ // Does this overlap the block we wanted? Give back the overlapped
+ // parts and try again.
+ //
+ // There is still a bug in this code: if top_overlap == bytes,
+ // the overlap is offset from requested region by the value of gap.
+ // In this case giving back the overlapped part will not work,
+ // because we'll give back the entire block at base[i] and
+ // therefore the subsequent allocation will not generate a new gap.
+ // This could be fixed with a new algorithm that used larger
+ // or variable size chunks to find the requested region -
+ // but such a change would introduce additional complications.
+ // It's rare enough that the planets align for this bug,
+ // so we'll just wait for a fix for 6204603/5003415 which
+ // will provide a mmap flag to allow us to avoid this business.
+
+ size_t top_overlap = requested_addr + (bytes + gap) - base[i];
+ if (top_overlap >= 0 && top_overlap < bytes) {
+ had_top_overlap = true;
+ unmap_memory(base[i], top_overlap);
+ base[i] += top_overlap;
+ size[i] = bytes - top_overlap;
+ } else {
+ size_t bottom_overlap = base[i] + bytes - requested_addr;
+ if (bottom_overlap >= 0 && bottom_overlap < bytes) {
+ if (PrintMiscellaneous && Verbose && bottom_overlap == 0) {
+ warning("attempt_reserve_memory_at: possible alignment bug");
+ }
+ unmap_memory(requested_addr, bottom_overlap);
+ size[i] = bytes - bottom_overlap;
+ } else {
+ size[i] = bytes;
+ }
+ }
+ }
+ }
+
+ // Give back the unused reserved pieces.
+
+ for (int j = 0; j < i; ++j) {
+ if (base[j] != NULL) {
+ unmap_memory(base[j], size[j]);
+ }
+ }
+
+ return (i < max_tries) ? requested_addr : NULL;
+}
+
+bool os::release_memory(char* addr, size_t bytes) {
+ size_t size = bytes;
+ return munmap(addr, size) == 0;
+}
+
+static bool solaris_mprotect(char* addr, size_t bytes, int prot) {
+ assert(addr == (char*)align_size_down((uintptr_t)addr, os::vm_page_size()),
+ "addr must be page aligned");
+ int retVal = mprotect(addr, bytes, prot);
+ return retVal == 0;
+}
+
+// Protect memory (make it read-only. (Used to pass readonly pages through
+// JNI GetArray<type>Elements with empty arrays.)
+bool os::protect_memory(char* addr, size_t bytes) {
+ return solaris_mprotect(addr, bytes, PROT_READ);
+}
+
+// guard_memory and unguard_memory only happens within stack guard pages.
+// Since ISM pertains only to the heap, guard and unguard memory should not
+/// happen with an ISM region.
+bool os::guard_memory(char* addr, size_t bytes) {
+ return solaris_mprotect(addr, bytes, PROT_NONE);
+}
+
+bool os::unguard_memory(char* addr, size_t bytes) {
+ return solaris_mprotect(addr, bytes, PROT_READ|PROT_WRITE|PROT_EXEC);
+}
+
+// Large page support
+
+// UseLargePages is the master flag to enable/disable large page memory.
+// UseMPSS and UseISM are supported for compatibility reasons. Their combined
+// effects can be described in the following table:
+//
+// UseLargePages UseMPSS UseISM
+// false * * => UseLargePages is the master switch, turning
+// it off will turn off both UseMPSS and
+// UseISM. VM will not use large page memory
+// regardless the settings of UseMPSS/UseISM.
+// true false false => Unless future Solaris provides other
+// mechanism to use large page memory, this
+// combination is equivalent to -UseLargePages,
+// VM will not use large page memory
+// true true false => JVM will use MPSS for large page memory.
+// This is the default behavior.
+// true false true => JVM will use ISM for large page memory.
+// true true true => JVM will use ISM if it is available.
+// Otherwise, JVM will fall back to MPSS.
+// Becaues ISM is now available on all
+// supported Solaris versions, this combination
+// is equivalent to +UseISM -UseMPSS.
+
+typedef int (*getpagesizes_func_type) (size_t[], int);
+static size_t _large_page_size = 0;
+
+bool os::Solaris::ism_sanity_check(bool warn, size_t * page_size) {
+ // x86 uses either 2M or 4M page, depending on whether PAE (Physical Address
+ // Extensions) mode is enabled. AMD64/EM64T uses 2M page in 64bit mode. Sparc
+ // can support multiple page sizes.
+
+ // Don't bother to probe page size because getpagesizes() comes with MPSS.
+ // ISM is only recommended on old Solaris where there is no MPSS support.
+ // Simply choose a conservative value as default.
+ *page_size = LargePageSizeInBytes ? LargePageSizeInBytes :
+ SPARC_ONLY(4 * M) IA32_ONLY(4 * M) AMD64_ONLY(2 * M);
+
+ // ISM is available on all supported Solaris versions
+ return true;
+}
+
+// Insertion sort for small arrays (descending order).
+static void insertion_sort_descending(size_t* array, int len) {
+ for (int i = 0; i < len; i++) {
+ size_t val = array[i];
+ for (size_t key = i; key > 0 && array[key - 1] < val; --key) {
+ size_t tmp = array[key];
+ array[key] = array[key - 1];
+ array[key - 1] = tmp;
+ }
+ }
+}
+
+bool os::Solaris::mpss_sanity_check(bool warn, size_t * page_size) {
+ getpagesizes_func_type getpagesizes_func =
+ CAST_TO_FN_PTR(getpagesizes_func_type, dlsym(RTLD_DEFAULT, "getpagesizes"));
+ if (getpagesizes_func == NULL) {
+ if (warn) {
+ warning("MPSS is not supported by the operating system.");
+ }
+ return false;
+ }
+
+ const unsigned int usable_count = VM_Version::page_size_count();
+ if (usable_count == 1) {
+ return false;
+ }
+
+ // Fill the array of page sizes.
+ int n = getpagesizes_func(_page_sizes, page_sizes_max);
+ assert(n > 0, "Solaris bug?");
+ if (n == page_sizes_max) {
+ // Add a sentinel value (necessary only if the array was completely filled
+ // since it is static (zeroed at initialization)).
+ _page_sizes[--n] = 0;
+ DEBUG_ONLY(warning("increase the size of the os::_page_sizes array.");)
+ }
+ assert(_page_sizes[n] == 0, "missing sentinel");
+
+ if (n == 1) return false; // Only one page size available.
+
+ // Skip sizes larger than 4M (or LargePageSizeInBytes if it was set) and
+ // select up to usable_count elements. First sort the array, find the first
+ // acceptable value, then copy the usable sizes to the top of the array and
+ // trim the rest. Make sure to include the default page size :-).
+ //
+ // A better policy could get rid of the 4M limit by taking the sizes of the
+ // important VM memory regions (java heap and possibly the code cache) into
+ // account.
+ insertion_sort_descending(_page_sizes, n);
+ const size_t size_limit =
+ FLAG_IS_DEFAULT(LargePageSizeInBytes) ? 4 * M : LargePageSizeInBytes;
+ int beg;
+ for (beg = 0; beg < n && _page_sizes[beg] > size_limit; ++beg) /* empty */ ;
+ const int end = MIN2((int)usable_count, n) - 1;
+ for (int cur = 0; cur < end; ++cur, ++beg) {
+ _page_sizes[cur] = _page_sizes[beg];
+ }
+ _page_sizes[end] = vm_page_size();
+ _page_sizes[end + 1] = 0;
+
+ if (_page_sizes[end] > _page_sizes[end - 1]) {
+ // Default page size is not the smallest; sort again.
+ insertion_sort_descending(_page_sizes, end + 1);
+ }
+ *page_size = _page_sizes[0];
+
+ return true;
+}
+
+bool os::large_page_init() {
+ if (!UseLargePages) {
+ UseISM = false;
+ UseMPSS = false;
+ return false;
+ }
+
+ // print a warning if any large page related flag is specified on command line
+ bool warn_on_failure = !FLAG_IS_DEFAULT(UseLargePages) ||
+ !FLAG_IS_DEFAULT(UseISM) ||
+ !FLAG_IS_DEFAULT(UseMPSS) ||
+ !FLAG_IS_DEFAULT(LargePageSizeInBytes);
+ UseISM = UseISM &&
+ Solaris::ism_sanity_check(warn_on_failure, &_large_page_size);
+ if (UseISM) {
+ // ISM disables MPSS to be compatible with old JDK behavior
+ UseMPSS = false;
+ }
+
+ UseMPSS = UseMPSS &&
+ Solaris::mpss_sanity_check(warn_on_failure, &_large_page_size);
+
+ UseLargePages = UseISM || UseMPSS;
+ return UseLargePages;
+}
+
+bool os::Solaris::set_mpss_range(caddr_t start, size_t bytes, size_t align) {
+ // Signal to OS that we want large pages for addresses
+ // from addr, addr + bytes
+ struct memcntl_mha mpss_struct;
+ mpss_struct.mha_cmd = MHA_MAPSIZE_VA;
+ mpss_struct.mha_pagesize = align;
+ mpss_struct.mha_flags = 0;
+ if (memcntl(start, bytes, MC_HAT_ADVISE,
+ (caddr_t) &mpss_struct, 0, 0) < 0) {
+ debug_only(warning("Attempt to use MPSS failed."));
+ return false;
+ }
+ return true;
+}
+
+char* os::reserve_memory_special(size_t bytes) {
+ assert(UseLargePages && UseISM, "only for ISM large pages");
+
+ size_t size = bytes;
+ char* retAddr = NULL;
+ int shmid;
+ key_t ismKey;
+
+ bool warn_on_failure = UseISM &&
+ (!FLAG_IS_DEFAULT(UseLargePages) ||
+ !FLAG_IS_DEFAULT(UseISM) ||
+ !FLAG_IS_DEFAULT(LargePageSizeInBytes)
+ );
+ char msg[128];
+
+ ismKey = IPC_PRIVATE;
+
+ // Create a large shared memory region to attach to based on size.
+ // Currently, size is the total size of the heap
+ shmid = shmget(ismKey, size, SHM_R | SHM_W | IPC_CREAT);
+ if (shmid == -1){
+ if (warn_on_failure) {
+ jio_snprintf(msg, sizeof(msg), "Failed to reserve shared memory (errno = %d).", errno);
+ warning(msg);
+ }
+ return NULL;
+ }
+
+ // Attach to the region
+ retAddr = (char *) shmat(shmid, 0, SHM_SHARE_MMU | SHM_R | SHM_W);
+ int err = errno;
+
+ // Remove shmid. If shmat() is successful, the actual shared memory segment
+ // will be deleted when it's detached by shmdt() or when the process
+ // terminates. If shmat() is not successful this will remove the shared
+ // segment immediately.
+ shmctl(shmid, IPC_RMID, NULL);
+
+ if (retAddr == (char *) -1) {
+ if (warn_on_failure) {
+ jio_snprintf(msg, sizeof(msg), "Failed to attach shared memory (errno = %d).", err);
+ warning(msg);
+ }
+ return NULL;
+ }
+
+ return retAddr;
+}
+
+bool os::release_memory_special(char* base, size_t bytes) {
+ // detaching the SHM segment will also delete it, see reserve_memory_special()
+ int rslt = shmdt(base);
+ return rslt == 0;
+}
+
+size_t os::large_page_size() {
+ return _large_page_size;
+}
+
+// MPSS allows application to commit large page memory on demand; with ISM
+// the entire memory region must be allocated as shared memory.
+bool os::can_commit_large_page_memory() {
+ return UseISM ? false : true;
+}
+
+static int os_sleep(jlong millis, bool interruptible) {
+ const jlong limit = INT_MAX;
+ jlong prevtime;
+ int res;
+
+ while (millis > limit) {
+ if ((res = os_sleep(limit, interruptible)) != OS_OK)
+ return res;
+ millis -= limit;
+ }
+
+ // Restart interrupted polls with new parameters until the proper delay
+ // has been completed.
+
+ prevtime = getTimeMillis();
+
+ while (millis > 0) {
+ jlong newtime;
+
+ if (!interruptible) {
+ // Following assert fails for os::yield_all:
+ // assert(!thread->is_Java_thread(), "must not be java thread");
+ res = poll(NULL, 0, millis);
+ } else {
+ JavaThread *jt = JavaThread::current();
+
+ INTERRUPTIBLE_NORESTART_VM_ALWAYS(poll(NULL, 0, millis), res, jt,
+ os::Solaris::clear_interrupted);
+ }
+
+ // INTERRUPTIBLE_NORESTART_VM_ALWAYS returns res == OS_INTRPT for
+ // thread.Interrupt.
+
+ if((res == OS_ERR) && (errno == EINTR)) {
+ newtime = getTimeMillis();
+ assert(newtime >= prevtime, "time moving backwards");
+ /* Doing prevtime and newtime in microseconds doesn't help precision,
+ and trying to round up to avoid lost milliseconds can result in a
+ too-short delay. */
+ millis -= newtime - prevtime;
+ if(millis <= 0)
+ return OS_OK;
+ prevtime = newtime;
+ } else
+ return res;
+ }
+
+ return OS_OK;
+}
+
+// Read calls from inside the vm need to perform state transitions
+size_t os::read(int fd, void *buf, unsigned int nBytes) {
+ INTERRUPTIBLE_RETURN_INT_VM(::read(fd, buf, nBytes), os::Solaris::clear_interrupted);
+}
+
+int os::sleep(Thread* thread, jlong millis, bool interruptible) {
+ assert(thread == Thread::current(), "thread consistency check");
+
+ // TODO-FIXME: this should be removed.
+ // On Solaris machines (especially 2.5.1) we found that sometimes the VM gets into a live lock
+ // situation with a JavaThread being starved out of a lwp. The kernel doesn't seem to generate
+ // a SIGWAITING signal which would enable the threads library to create a new lwp for the starving
+ // thread. We suspect that because the Watcher thread keeps waking up at periodic intervals the kernel
+ // is fooled into believing that the system is making progress. In the code below we block the
+ // the watcher thread while safepoint is in progress so that it would not appear as though the
+ // system is making progress.
+ if (!Solaris::T2_libthread() &&
+ thread->is_Watcher_thread() && SafepointSynchronize::is_synchronizing() && !Arguments::has_profile()) {
+ // We now try to acquire the threads lock. Since this lock is held by the VM thread during
+ // the entire safepoint, the watcher thread will line up here during the safepoint.
+ Threads_lock->lock_without_safepoint_check();
+ Threads_lock->unlock();
+ }
+
+ if (thread->is_Java_thread()) {
+ // This is a JavaThread so we honor the _thread_blocked protocol
+ // even for sleeps of 0 milliseconds. This was originally done
+ // as a workaround for bug 4338139. However, now we also do it
+ // to honor the suspend-equivalent protocol.
+
+ JavaThread *jt = (JavaThread *) thread;
+ ThreadBlockInVM tbivm(jt);
+
+ jt->set_suspend_equivalent();
+ // cleared by handle_special_suspend_equivalent_condition() or
+ // java_suspend_self() via check_and_wait_while_suspended()
+
+ int ret_code;
+ if (millis <= 0) {
+ thr_yield();
+ ret_code = 0;
+ } else {
+ // The original sleep() implementation did not create an
+ // OSThreadWaitState helper for sleeps of 0 milliseconds.
+ // I'm preserving that decision for now.
+ OSThreadWaitState osts(jt->osthread(), false /* not Object.wait() */);
+
+ ret_code = os_sleep(millis, interruptible);
+ }
+
+ // were we externally suspended while we were waiting?
+ jt->check_and_wait_while_suspended();
+
+ return ret_code;
+ }
+
+ // non-JavaThread from this point on:
+
+ if (millis <= 0) {
+ thr_yield();
+ return 0;
+ }
+
+ OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */);
+
+ return os_sleep(millis, interruptible);
+}
+
+int os::naked_sleep() {
+ // %% make the sleep time an integer flag. for now use 1 millisec.
+ return os_sleep(1, false);
+}
+
+// Sleep forever; naked call to OS-specific sleep; use with CAUTION
+void os::infinite_sleep() {
+ while (true) { // sleep forever ...
+ ::sleep(100); // ... 100 seconds at a time
+ }
+}
+
+// Used to convert frequent JVM_Yield() to nops
+bool os::dont_yield() {
+ if (DontYieldALot) {
+ static hrtime_t last_time = 0;
+ hrtime_t diff = getTimeNanos() - last_time;
+
+ if (diff < DontYieldALotInterval * 1000000)
+ return true;
+
+ last_time += diff;
+
+ return false;
+ }
+ else {
+ return false;
+ }
+}
+
+// Caveat: Solaris os::yield() causes a thread-state transition whereas
+// the linux and win32 implementations do not. This should be checked.
+
+void os::yield() {
+ // Yields to all threads with same or greater priority
+ os::sleep(Thread::current(), 0, false);
+}
+
+// Note that yield semantics are defined by the scheduling class to which
+// the thread currently belongs. Typically, yield will _not yield to
+// other equal or higher priority threads that reside on the dispatch queues
+// of other CPUs.
+
+os::YieldResult os::NakedYield() { thr_yield(); return os::YIELD_UNKNOWN; }
+
+
+// On Solaris we found that yield_all doesn't always yield to all other threads.
+// There have been cases where there is a thread ready to execute but it doesn't
+// get an lwp as the VM thread continues to spin with sleeps of 1 millisecond.
+// The 1 millisecond wait doesn't seem long enough for the kernel to issue a
+// SIGWAITING signal which will cause a new lwp to be created. So we count the
+// number of times yield_all is called in the one loop and increase the sleep
+// time after 8 attempts. If this fails too we increase the concurrency level
+// so that the starving thread would get an lwp
+
+void os::yield_all(int attempts) {
+ // Yields to all threads, including threads with lower priorities
+ if (attempts == 0) {
+ os::sleep(Thread::current(), 1, false);
+ } else {
+ int iterations = attempts % 30;
+ if (iterations == 0 && !os::Solaris::T2_libthread()) {
+ // thr_setconcurrency and _getconcurrency make sense only under T1.
+ int noofLWPS = thr_getconcurrency();
+ if (noofLWPS < (Threads::number_of_threads() + 2)) {
+ thr_setconcurrency(thr_getconcurrency() + 1);
+ }
+ } else if (iterations < 25) {
+ os::sleep(Thread::current(), 1, false);
+ } else {
+ os::sleep(Thread::current(), 10, false);
+ }
+ }
+}
+
+// Called from the tight loops to possibly influence time-sharing heuristics
+void os::loop_breaker(int attempts) {
+ os::yield_all(attempts);
+}
+
+
+// Interface for setting lwp priorities. If we are using T2 libthread,
+// which forces the use of BoundThreads or we manually set UseBoundThreads,
+// all of our threads will be assigned to real lwp's. Using the thr_setprio
+// function is meaningless in this mode so we must adjust the real lwp's priority
+// The routines below implement the getting and setting of lwp priorities.
+//
+// Note: There are three priority scales used on Solaris. Java priotities
+// which range from 1 to 10, libthread "thr_setprio" scale which range
+// from 0 to 127, and the current scheduling class of the process we
+// are running in. This is typically from -60 to +60.
+// The setting of the lwp priorities in done after a call to thr_setprio
+// so Java priorities are mapped to libthread priorities and we map from
+// the latter to lwp priorities. We don't keep priorities stored in
+// Java priorities since some of our worker threads want to set priorities
+// higher than all Java threads.
+//
+// For related information:
+// (1) man -s 2 priocntl
+// (2) man -s 4 priocntl
+// (3) man dispadmin
+// = librt.so
+// = libthread/common/rtsched.c - thrp_setlwpprio().
+// = ps -cL <pid> ... to validate priority.
+// = sched_get_priority_min and _max
+// pthread_create
+// sched_setparam
+// pthread_setschedparam
+//
+// Assumptions:
+// + We assume that all threads in the process belong to the same
+// scheduling class. IE. an homogenous process.
+// + Must be root or in IA group to change change "interactive" attribute.
+// Priocntl() will fail silently. The only indication of failure is when
+// we read-back the value and notice that it hasn't changed.
+// + Interactive threads enter the runq at the head, non-interactive at the tail.
+// + For RT, change timeslice as well. Invariant:
+// constant "priority integral"
+// Konst == TimeSlice * (60-Priority)
+// Given a priority, compute appropriate timeslice.
+// + Higher numerical values have higher priority.
+
+// sched class attributes
+typedef struct {
+ int schedPolicy; // classID
+ int maxPrio;
+ int minPrio;
+} SchedInfo;
+
+
+static SchedInfo tsLimits, iaLimits, rtLimits;
+
+#ifdef ASSERT
+static int ReadBackValidate = 1;
+#endif
+static int myClass = 0;
+static int myMin = 0;
+static int myMax = 0;
+static int myCur = 0;
+static bool priocntl_enable = false;
+
+
+// Call the version of priocntl suitable for all supported versions
+// of Solaris. We need to call through this wrapper so that we can
+// build on Solaris 9 and run on Solaris 8, 9 and 10.
+//
+// This code should be removed if we ever stop supporting Solaris 8
+// and earlier releases.
+
+static long priocntl_stub(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg);
+typedef long (*priocntl_type)(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg);
+static priocntl_type priocntl_ptr = priocntl_stub;
+
+// Stub to set the value of the real pointer, and then call the real
+// function.
+
+static long priocntl_stub(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg) {
+ // Try Solaris 8- name only.
+ priocntl_type tmp = (priocntl_type)dlsym(RTLD_DEFAULT, "__priocntl");
+ guarantee(tmp != NULL, "priocntl function not found.");
+ priocntl_ptr = tmp;
+ return (*priocntl_ptr)(PC_VERSION, idtype, id, cmd, arg);
+}
+
+
+// lwp_priocntl_init
+//
+// Try to determine the priority scale for our process.
+//
+// Return errno or 0 if OK.
+//
+static
+int lwp_priocntl_init ()
+{
+ int rslt;
+ pcinfo_t ClassInfo;
+ pcparms_t ParmInfo;
+ int i;
+
+ if (!UseThreadPriorities) return 0;
+
+ // We are using Bound threads, we need to determine our priority ranges
+ if (os::Solaris::T2_libthread() || UseBoundThreads) {
+ // If ThreadPriorityPolicy is 1, switch tables
+ if (ThreadPriorityPolicy == 1) {
+ for (i = 0 ; i < MaxPriority+1; i++)
+ os::java_to_os_priority[i] = prio_policy1[i];
+ }
+ }
+ // Not using Bound Threads, set to ThreadPolicy 1
+ else {
+ for ( i = 0 ; i < MaxPriority+1; i++ ) {
+ os::java_to_os_priority[i] = prio_policy1[i];
+ }
+ return 0;
+ }
+
+
+ // Get IDs for a set of well-known scheduling classes.
+ // TODO-FIXME: GETCLINFO returns the current # of classes in the
+ // the system. We should have a loop that iterates over the
+ // classID values, which are known to be "small" integers.
+
+ strcpy(ClassInfo.pc_clname, "TS");
+ ClassInfo.pc_cid = -1;
+ rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
+ if (rslt < 0) return errno;
+ assert(ClassInfo.pc_cid != -1, "cid for TS class is -1");
+ tsLimits.schedPolicy = ClassInfo.pc_cid;
+ tsLimits.maxPrio = ((tsinfo_t*)ClassInfo.pc_clinfo)->ts_maxupri;
+ tsLimits.minPrio = -tsLimits.maxPrio;
+
+ strcpy(ClassInfo.pc_clname, "IA");
+ ClassInfo.pc_cid = -1;
+ rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
+ if (rslt < 0) return errno;
+ assert(ClassInfo.pc_cid != -1, "cid for IA class is -1");
+ iaLimits.schedPolicy = ClassInfo.pc_cid;
+ iaLimits.maxPrio = ((iainfo_t*)ClassInfo.pc_clinfo)->ia_maxupri;
+ iaLimits.minPrio = -iaLimits.maxPrio;
+
+ strcpy(ClassInfo.pc_clname, "RT");
+ ClassInfo.pc_cid = -1;
+ rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
+ if (rslt < 0) return errno;
+ assert(ClassInfo.pc_cid != -1, "cid for RT class is -1");
+ rtLimits.schedPolicy = ClassInfo.pc_cid;
+ rtLimits.maxPrio = ((rtinfo_t*)ClassInfo.pc_clinfo)->rt_maxpri;
+ rtLimits.minPrio = 0;
+
+
+ // Query our "current" scheduling class.
+ // This will normally be IA,TS or, rarely, RT.
+ memset (&ParmInfo, 0, sizeof(ParmInfo));
+ ParmInfo.pc_cid = PC_CLNULL;
+ rslt = (*priocntl_ptr) (PC_VERSION, P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo );
+ if ( rslt < 0 ) return errno;
+ myClass = ParmInfo.pc_cid;
+
+ // We now know our scheduling classId, get specific information
+ // the class.
+ ClassInfo.pc_cid = myClass;
+ ClassInfo.pc_clname[0] = 0;
+ rslt = (*priocntl_ptr) (PC_VERSION, (idtype)0, 0, PC_GETCLINFO, (caddr_t)&ClassInfo );
+ if ( rslt < 0 ) return errno;
+
+ if (ThreadPriorityVerbose)
+ tty->print_cr ("lwp_priocntl_init: Class=%d(%s)...", myClass, ClassInfo.pc_clname);
+
+ memset(&ParmInfo, 0, sizeof(pcparms_t));
+ ParmInfo.pc_cid = PC_CLNULL;
+ rslt = (*priocntl_ptr)(PC_VERSION, P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo);
+ if (rslt < 0) return errno;
+
+ if (ParmInfo.pc_cid == rtLimits.schedPolicy) {
+ myMin = rtLimits.minPrio;
+ myMax = rtLimits.maxPrio;
+ } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) {
+ iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms;
+ myMin = iaLimits.minPrio;
+ myMax = iaLimits.maxPrio;
+ myMax = MIN2(myMax, (int)iaInfo->ia_uprilim); // clamp - restrict
+ } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) {
+ tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms;
+ myMin = tsLimits.minPrio;
+ myMax = tsLimits.maxPrio;
+ myMax = MIN2(myMax, (int)tsInfo->ts_uprilim); // clamp - restrict
+ } else {
+ // No clue - punt
+ if (ThreadPriorityVerbose)
+ tty->print_cr ("Unknown scheduling class: %s ... \n", ClassInfo.pc_clname);
+ return EINVAL; // no clue, punt
+ }
+
+ if (ThreadPriorityVerbose)
+ tty->print_cr ("Thread priority Range: [%d..%d]\n", myMin, myMax);
+
+ priocntl_enable = true; // Enable changing priorities
+ return 0;
+}
+
+#define IAPRI(x) ((iaparms_t *)((x).pc_clparms))
+#define RTPRI(x) ((rtparms_t *)((x).pc_clparms))
+#define TSPRI(x) ((tsparms_t *)((x).pc_clparms))
+
+
+// scale_to_lwp_priority
+//
+// Convert from the libthread "thr_setprio" scale to our current
+// lwp scheduling class scale.
+//
+static
+int scale_to_lwp_priority (int rMin, int rMax, int x)
+{
+ int v;
+
+ if (x == 127) return rMax; // avoid round-down
+ v = (((x*(rMax-rMin)))/128)+rMin;
+ return v;
+}
+
+
+// set_lwp_priority
+//
+// Set the priority of the lwp. This call should only be made
+// when using bound threads (T2 threads are bound by default).
+//
+int set_lwp_priority (int ThreadID, int lwpid, int newPrio )
+{
+ int rslt;
+ int Actual, Expected, prv;
+ pcparms_t ParmInfo; // for GET-SET
+#ifdef ASSERT
+ pcparms_t ReadBack; // for readback
+#endif
+
+ // Set priority via PC_GETPARMS, update, PC_SETPARMS
+ // Query current values.
+ // TODO: accelerate this by eliminating the PC_GETPARMS call.
+ // Cache "pcparms_t" in global ParmCache.
+ // TODO: elide set-to-same-value
+
+ // If something went wrong on init, don't change priorities.
+ if ( !priocntl_enable ) {
+ if (ThreadPriorityVerbose)
+ tty->print_cr("Trying to set priority but init failed, ignoring");
+ return EINVAL;
+ }
+
+
+ // If lwp hasn't started yet, just return
+ // the _start routine will call us again.
+ if ( lwpid <= 0 ) {
+ if (ThreadPriorityVerbose) {
+ tty->print_cr ("deferring the set_lwp_priority of thread " INTPTR_FORMAT " to %d, lwpid not set",
+ ThreadID, newPrio);
+ }
+ return 0;
+ }
+
+ if (ThreadPriorityVerbose) {
+ tty->print_cr ("set_lwp_priority(" INTPTR_FORMAT "@" INTPTR_FORMAT " %d) ",
+ ThreadID, lwpid, newPrio);
+ }
+
+ memset(&ParmInfo, 0, sizeof(pcparms_t));
+ ParmInfo.pc_cid = PC_CLNULL;
+ rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ParmInfo);
+ if (rslt < 0) return errno;
+
+ if (ParmInfo.pc_cid == rtLimits.schedPolicy) {
+ rtparms_t *rtInfo = (rtparms_t*)ParmInfo.pc_clparms;
+ rtInfo->rt_pri = scale_to_lwp_priority (rtLimits.minPrio, rtLimits.maxPrio, newPrio);
+ rtInfo->rt_tqsecs = RT_NOCHANGE;
+ rtInfo->rt_tqnsecs = RT_NOCHANGE;
+ if (ThreadPriorityVerbose) {
+ tty->print_cr("RT: %d->%d\n", newPrio, rtInfo->rt_pri);
+ }
+ } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) {
+ iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms;
+ int maxClamped = MIN2(iaLimits.maxPrio, (int)iaInfo->ia_uprilim);
+ iaInfo->ia_upri = scale_to_lwp_priority(iaLimits.minPrio, maxClamped, newPrio);
+ iaInfo->ia_uprilim = IA_NOCHANGE;
+ iaInfo->ia_nice = IA_NOCHANGE;
+ iaInfo->ia_mode = IA_NOCHANGE;
+ if (ThreadPriorityVerbose) {
+ tty->print_cr ("IA: [%d...%d] %d->%d\n",
+ iaLimits.minPrio, maxClamped, newPrio, iaInfo->ia_upri);
+ }
+ } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) {
+ tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms;
+ int maxClamped = MIN2(tsLimits.maxPrio, (int)tsInfo->ts_uprilim);
+ prv = tsInfo->ts_upri;
+ tsInfo->ts_upri = scale_to_lwp_priority(tsLimits.minPrio, maxClamped, newPrio);
+ tsInfo->ts_uprilim = IA_NOCHANGE;
+ if (ThreadPriorityVerbose) {
+ tty->print_cr ("TS: %d [%d...%d] %d->%d\n",
+ prv, tsLimits.minPrio, maxClamped, newPrio, tsInfo->ts_upri);
+ }
+ if (prv == tsInfo->ts_upri) return 0;
+ } else {
+ if ( ThreadPriorityVerbose ) {
+ tty->print_cr ("Unknown scheduling class\n");
+ }
+ return EINVAL; // no clue, punt
+ }
+
+ rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_SETPARMS, (caddr_t)&ParmInfo);
+ if (ThreadPriorityVerbose && rslt) {
+ tty->print_cr ("PC_SETPARMS ->%d %d\n", rslt, errno);
+ }
+ if (rslt < 0) return errno;
+
+#ifdef ASSERT
+ // Sanity check: read back what we just attempted to set.
+ // In theory it could have changed in the interim ...
+ //
+ // The priocntl system call is tricky.
+ // Sometimes it'll validate the priority value argument and
+ // return EINVAL if unhappy. At other times it fails silently.
+ // Readbacks are prudent.
+
+ if (!ReadBackValidate) return 0;
+
+ memset(&ReadBack, 0, sizeof(pcparms_t));
+ ReadBack.pc_cid = PC_CLNULL;
+ rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ReadBack);
+ assert(rslt >= 0, "priocntl failed");
+ Actual = Expected = 0xBAD;
+ assert(ParmInfo.pc_cid == ReadBack.pc_cid, "cid's don't match");
+ if (ParmInfo.pc_cid == rtLimits.schedPolicy) {
+ Actual = RTPRI(ReadBack)->rt_pri;
+ Expected = RTPRI(ParmInfo)->rt_pri;
+ } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) {
+ Actual = IAPRI(ReadBack)->ia_upri;
+ Expected = IAPRI(ParmInfo)->ia_upri;
+ } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) {
+ Actual = TSPRI(ReadBack)->ts_upri;
+ Expected = TSPRI(ParmInfo)->ts_upri;
+ } else {
+ if ( ThreadPriorityVerbose ) {
+ tty->print_cr("set_lwp_priority: unexpected class in readback: %d\n", ParmInfo.pc_cid);
+ }
+ }
+
+ if (Actual != Expected) {
+ if ( ThreadPriorityVerbose ) {
+ tty->print_cr ("set_lwp_priority(%d %d) Class=%d: actual=%d vs expected=%d\n",
+ lwpid, newPrio, ReadBack.pc_cid, Actual, Expected);
+ }
+ }
+#endif
+
+ return 0;
+}
+
+
+
+// Solaris only gives access to 128 real priorities at a time,
+// so we expand Java's ten to fill this range. This would be better
+// if we dynamically adjusted relative priorities.
+//
+// The ThreadPriorityPolicy option allows us to select 2 different
+// priority scales.
+//
+// ThreadPriorityPolicy=0
+// Since the Solaris' default priority is MaximumPriority, we do not
+// set a priority lower than Max unless a priority lower than
+// NormPriority is requested.
+//
+// ThreadPriorityPolicy=1
+// This mode causes the priority table to get filled with
+// linear values. NormPriority get's mapped to 50% of the
+// Maximum priority an so on. This will cause VM threads
+// to get unfair treatment against other Solaris processes
+// which do not explicitly alter their thread priorities.
+//
+
+
+int os::java_to_os_priority[MaxPriority + 1] = {
+ -99999, // 0 Entry should never be used
+
+ 0, // 1 MinPriority
+ 32, // 2
+ 64, // 3
+
+ 96, // 4
+ 127, // 5 NormPriority
+ 127, // 6
+
+ 127, // 7
+ 127, // 8
+ 127, // 9 NearMaxPriority
+
+ 127 // 10 MaxPriority
+};
+
+
+OSReturn os::set_native_priority(Thread* thread, int newpri) {
+ assert(newpri >= MinimumPriority && newpri <= MaximumPriority, "bad priority mapping");
+ if ( !UseThreadPriorities ) return OS_OK;
+ int status = thr_setprio(thread->osthread()->thread_id(), newpri);
+ if ( os::Solaris::T2_libthread() || (UseBoundThreads && thread->osthread()->is_vm_created()) )
+ status |= (set_lwp_priority (thread->osthread()->thread_id(),
+ thread->osthread()->lwp_id(), newpri ));
+ return (status == 0) ? OS_OK : OS_ERR;
+}
+
+
+OSReturn os::get_native_priority(const Thread* const thread, int *priority_ptr) {
+ int p;
+ if ( !UseThreadPriorities ) {
+ *priority_ptr = NormalPriority;
+ return OS_OK;
+ }
+ int status = thr_getprio(thread->osthread()->thread_id(), &p);
+ if (status != 0) {
+ return OS_ERR;
+ }
+ *priority_ptr = p;
+ return OS_OK;
+}
+
+
+// Hint to the underlying OS that a task switch would not be good.
+// Void return because it's a hint and can fail.
+void os::hint_no_preempt() {
+ schedctl_start(schedctl_init());
+}
+
+void os::interrupt(Thread* thread) {
+ assert(Thread::current() == thread || Threads_lock->owned_by_self(), "possibility of dangling Thread pointer");
+
+ OSThread* osthread = thread->osthread();
+
+ int isInterrupted = osthread->interrupted();
+ if (!isInterrupted) {
+ osthread->set_interrupted(true);
+ OrderAccess::fence();
+ // os::sleep() is implemented with either poll (NULL,0,timeout) or
+ // by parking on _SleepEvent. If the former, thr_kill will unwedge
+ // the sleeper by SIGINTR, otherwise the unpark() will wake the sleeper.
+ ParkEvent * const slp = thread->_SleepEvent ;
+ if (slp != NULL) slp->unpark() ;
+ }
+
+ // For JSR166: unpark after setting status but before thr_kill -dl
+ if (thread->is_Java_thread()) {
+ ((JavaThread*)thread)->parker()->unpark();
+ }
+
+ // Handle interruptible wait() ...
+ ParkEvent * const ev = thread->_ParkEvent ;
+ if (ev != NULL) ev->unpark() ;
+
+ // When events are used everywhere for os::sleep, then this thr_kill
+ // will only be needed if UseVMInterruptibleIO is true.
+
+ if (!isInterrupted) {
+ int status = thr_kill(osthread->thread_id(), os::Solaris::SIGinterrupt());
+ assert_status(status == 0, status, "thr_kill");
+
+ // Bump thread interruption counter
+ RuntimeService::record_thread_interrupt_signaled_count();
+ }
+}
+
+
+bool os::is_interrupted(Thread* thread, bool clear_interrupted) {
+ assert(Thread::current() == thread || Threads_lock->owned_by_self(), "possibility of dangling Thread pointer");
+
+ OSThread* osthread = thread->osthread();
+
+ bool res = osthread->interrupted();
+
+ // NOTE that since there is no "lock" around these two operations,
+ // there is the possibility that the interrupted flag will be
+ // "false" but that the interrupt event will be set. This is
+ // intentional. The effect of this is that Object.wait() will appear
+ // to have a spurious wakeup, which is not harmful, and the
+ // possibility is so rare that it is not worth the added complexity
+ // to add yet another lock. It has also been recommended not to put
+ // the interrupted flag into the os::Solaris::Event structure,
+ // because it hides the issue.
+ if (res && clear_interrupted) {
+ osthread->set_interrupted(false);
+ }
+ return res;
+}
+
+
+void os::print_statistics() {
+}
+
+int os::message_box(const char* title, const char* message) {
+ int i;
+ fdStream err(defaultStream::error_fd());
+ for (i = 0; i < 78; i++) err.print_raw("=");
+ err.cr();
+ err.print_raw_cr(title);
+ for (i = 0; i < 78; i++) err.print_raw("-");
+ err.cr();
+ err.print_raw_cr(message);
+ for (i = 0; i < 78; i++) err.print_raw("=");
+ err.cr();
+
+ char buf[16];
+ // Prevent process from exiting upon "read error" without consuming all CPU
+ while (::read(0, buf, sizeof(buf)) <= 0) { ::sleep(100); }
+
+ return buf[0] == 'y' || buf[0] == 'Y';
+}
+
+// A lightweight implementation that does not suspend the target thread and
+// thus returns only a hint. Used for profiling only!
+ExtendedPC os::get_thread_pc(Thread* thread) {
+ // Make sure that it is called by the watcher and the Threads lock is owned.
+ assert(Thread::current()->is_Watcher_thread(), "Must be watcher and own Threads_lock");
+ // For now, is only used to profile the VM Thread
+ assert(thread->is_VM_thread(), "Can only be called for VMThread");
+ ExtendedPC epc;
+
+ GetThreadPC_Callback cb(ProfileVM_lock);
+ OSThread *osthread = thread->osthread();
+ const int time_to_wait = 400; // 400ms wait for initial response
+ int status = cb.interrupt(thread, time_to_wait);
+
+ if (cb.is_done() ) {
+ epc = cb.addr();
+ } else {
+ DEBUG_ONLY(tty->print_cr("Failed to get pc for thread: %d got %d status",
+ osthread->thread_id(), status););
+ // epc is already NULL
+ }
+ return epc;
+}
+
+
+// This does not do anything on Solaris. This is basically a hook for being
+// able to use structured exception handling (thread-local exception filters) on, e.g., Win32.
+void os::os_exception_wrapper(java_call_t f, JavaValue* value, methodHandle* method, JavaCallArguments* args, Thread* thread) {
+ f(value, method, args, thread);
+}
+
+// This routine may be used by user applications as a "hook" to catch signals.
+// The user-defined signal handler must pass unrecognized signals to this
+// routine, and if it returns true (non-zero), then the signal handler must
+// return immediately. If the flag "abort_if_unrecognized" is true, then this
+// routine will never retun false (zero), but instead will execute a VM panic
+// routine kill the process.
+//
+// If this routine returns false, it is OK to call it again. This allows
+// the user-defined signal handler to perform checks either before or after
+// the VM performs its own checks. Naturally, the user code would be making
+// a serious error if it tried to handle an exception (such as a null check
+// or breakpoint) that the VM was generating for its own correct operation.
+//
+// This routine may recognize any of the following kinds of signals:
+// SIGBUS, SIGSEGV, SIGILL, SIGFPE, BREAK_SIGNAL, SIGPIPE, SIGXFSZ,
+// os::Solaris::SIGasync
+// It should be consulted by handlers for any of those signals.
+// It explicitly does not recognize os::Solaris::SIGinterrupt
+//
+// The caller of this routine must pass in the three arguments supplied
+// to the function referred to in the "sa_sigaction" (not the "sa_handler")
+// field of the structure passed to sigaction(). This routine assumes that
+// the sa_flags field passed to sigaction() includes SA_SIGINFO and SA_RESTART.
+//
+// Note that the VM will print warnings if it detects conflicting signal
+// handlers, unless invoked with the option "-XX:+AllowUserSignalHandlers".
+//
+extern "C" int JVM_handle_solaris_signal(int signo, siginfo_t* siginfo, void* ucontext, int abort_if_unrecognized);
+
+
+void signalHandler(int sig, siginfo_t* info, void* ucVoid) {
+ JVM_handle_solaris_signal(sig, info, ucVoid, true);
+}
+
+/* Do not delete - if guarantee is ever removed, a signal handler (even empty)
+ is needed to provoke threads blocked on IO to return an EINTR
+ Note: this explicitly does NOT call JVM_handle_solaris_signal and
+ does NOT participate in signal chaining due to requirement for
+ NOT setting SA_RESTART to make EINTR work. */
+extern "C" void sigINTRHandler(int sig, siginfo_t* info, void* ucVoid) {
+ if (UseSignalChaining) {
+ struct sigaction *actp = os::Solaris::get_chained_signal_action(sig);
+ if (actp && actp->sa_handler) {
+ vm_exit_during_initialization("Signal chaining detected for VM interrupt signal, try -XX:+UseAltSigs");
+ }
+ }
+}
+
+// This boolean allows users to forward their own non-matching signals
+// to JVM_handle_solaris_signal, harmlessly.
+bool os::Solaris::signal_handlers_are_installed = false;
+
+// For signal-chaining
+bool os::Solaris::libjsig_is_loaded = false;
+typedef struct sigaction *(*get_signal_t)(int);
+get_signal_t os::Solaris::get_signal_action = NULL;
+
+struct sigaction* os::Solaris::get_chained_signal_action(int sig) {
+ struct sigaction *actp = NULL;
+
+ if ((libjsig_is_loaded) && (sig <= Maxlibjsigsigs)) {
+ // Retrieve the old signal handler from libjsig
+ actp = (*get_signal_action)(sig);
+ }
+ if (actp == NULL) {
+ // Retrieve the preinstalled signal handler from jvm
+ actp = get_preinstalled_handler(sig);
+ }
+
+ return actp;
+}
+
+static bool call_chained_handler(struct sigaction *actp, int sig,
+ siginfo_t *siginfo, void *context) {
+ // Call the old signal handler
+ if (actp->sa_handler == SIG_DFL) {
+ // It's more reasonable to let jvm treat it as an unexpected exception
+ // instead of taking the default action.
+ return false;
+ } else if (actp->sa_handler != SIG_IGN) {
+ if ((actp->sa_flags & SA_NODEFER) == 0) {
+ // automaticlly block the signal
+ sigaddset(&(actp->sa_mask), sig);
+ }
+
+ sa_handler_t hand;
+ sa_sigaction_t sa;
+ bool siginfo_flag_set = (actp->sa_flags & SA_SIGINFO) != 0;
+ // retrieve the chained handler
+ if (siginfo_flag_set) {
+ sa = actp->sa_sigaction;
+ } else {
+ hand = actp->sa_handler;
+ }
+
+ if ((actp->sa_flags & SA_RESETHAND) != 0) {
+ actp->sa_handler = SIG_DFL;
+ }
+
+ // try to honor the signal mask
+ sigset_t oset;
+ thr_sigsetmask(SIG_SETMASK, &(actp->sa_mask), &oset);
+
+ // call into the chained handler
+ if (siginfo_flag_set) {
+ (*sa)(sig, siginfo, context);
+ } else {
+ (*hand)(sig);
+ }
+
+ // restore the signal mask
+ thr_sigsetmask(SIG_SETMASK, &oset, 0);
+ }
+ // Tell jvm's signal handler the signal is taken care of.
+ return true;
+}
+
+bool os::Solaris::chained_handler(int sig, siginfo_t* siginfo, void* context) {
+ bool chained = false;
+ // signal-chaining
+ if (UseSignalChaining) {
+ struct sigaction *actp = get_chained_signal_action(sig);
+ if (actp != NULL) {
+ chained = call_chained_handler(actp, sig, siginfo, context);
+ }
+ }
+ return chained;
+}
+
+struct sigaction* os::Solaris::get_preinstalled_handler(int sig) {
+ assert((chainedsigactions != (struct sigaction *)NULL) && (preinstalled_sigs != (int *)NULL) , "signals not yet initialized");
+ if (preinstalled_sigs[sig] != 0) {
+ return &chainedsigactions[sig];
+ }
+ return NULL;
+}
+
+void os::Solaris::save_preinstalled_handler(int sig, struct sigaction& oldAct) {
+
+ assert(sig > 0 && sig <= Maxsignum, "vm signal out of expected range");
+ assert((chainedsigactions != (struct sigaction *)NULL) && (preinstalled_sigs != (int *)NULL) , "signals not yet initialized");
+ chainedsigactions[sig] = oldAct;
+ preinstalled_sigs[sig] = 1;
+}
+
+void os::Solaris::set_signal_handler(int sig, bool set_installed, bool oktochain) {
+ // Check for overwrite.
+ struct sigaction oldAct;
+ sigaction(sig, (struct sigaction*)NULL, &oldAct);
+ void* oldhand = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction)
+ : CAST_FROM_FN_PTR(void*, oldAct.sa_handler);
+ if (oldhand != CAST_FROM_FN_PTR(void*, SIG_DFL) &&
+ oldhand != CAST_FROM_FN_PTR(void*, SIG_IGN) &&
+ oldhand != CAST_FROM_FN_PTR(void*, signalHandler)) {
+ if (AllowUserSignalHandlers || !set_installed) {
+ // Do not overwrite; user takes responsibility to forward to us.
+ return;
+ } else if (UseSignalChaining) {
+ if (oktochain) {
+ // save the old handler in jvm
+ save_preinstalled_handler(sig, oldAct);
+ } else {
+ vm_exit_during_initialization("Signal chaining not allowed for VM interrupt signal, try -XX:+UseAltSigs.");
+ }
+ // libjsig also interposes the sigaction() call below and saves the
+ // old sigaction on it own.
+ } else {
+ fatal2("Encountered unexpected pre-existing sigaction handler %#lx for signal %d.", (long)oldhand, sig);
+ }
+ }
+
+ struct sigaction sigAct;
+ sigfillset(&(sigAct.sa_mask));
+ sigAct.sa_handler = SIG_DFL;
+
+ sigAct.sa_sigaction = signalHandler;
+ // Handle SIGSEGV on alternate signal stack if
+ // not using stack banging
+ if (!UseStackBanging && sig == SIGSEGV) {
+ sigAct.sa_flags = SA_SIGINFO | SA_RESTART | SA_ONSTACK;
+ // Interruptible i/o requires SA_RESTART cleared so EINTR
+ // is returned instead of restarting system calls
+ } else if (sig == os::Solaris::SIGinterrupt()) {
+ sigemptyset(&sigAct.sa_mask);
+ sigAct.sa_handler = NULL;
+ sigAct.sa_flags = SA_SIGINFO;
+ sigAct.sa_sigaction = sigINTRHandler;
+ } else {
+ sigAct.sa_flags = SA_SIGINFO | SA_RESTART;
+ }
+ os::Solaris::set_our_sigflags(sig, sigAct.sa_flags);
+
+ sigaction(sig, &sigAct, &oldAct);
+
+ void* oldhand2 = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction)
+ : CAST_FROM_FN_PTR(void*, oldAct.sa_handler);
+ assert(oldhand2 == oldhand, "no concurrent signal handler installation");
+}
+
+
+#define DO_SIGNAL_CHECK(sig) \
+ if (!sigismember(&check_signal_done, sig)) \
+ os::Solaris::check_signal_handler(sig)
+
+// This method is a periodic task to check for misbehaving JNI applications
+// under CheckJNI, we can add any periodic checks here
+
+void os::run_periodic_checks() {
+ // A big source of grief is hijacking virt. addr 0x0 on Solaris,
+ // thereby preventing a NULL checks.
+ if(!check_addr0_done) check_addr0_done = check_addr0(tty);
+
+ if (check_signals == false) return;
+
+ // SEGV and BUS if overridden could potentially prevent
+ // generation of hs*.log in the event of a crash, debugging
+ // such a case can be very challenging, so we absolutely
+ // check for the following for a good measure:
+ DO_SIGNAL_CHECK(SIGSEGV);
+ DO_SIGNAL_CHECK(SIGILL);
+ DO_SIGNAL_CHECK(SIGFPE);
+ DO_SIGNAL_CHECK(SIGBUS);
+ DO_SIGNAL_CHECK(SIGPIPE);
+ DO_SIGNAL_CHECK(SIGXFSZ);
+
+ // ReduceSignalUsage allows the user to override these handlers
+ // see comments at the very top and jvm_solaris.h
+ if (!ReduceSignalUsage) {
+ DO_SIGNAL_CHECK(SHUTDOWN1_SIGNAL);
+ DO_SIGNAL_CHECK(SHUTDOWN2_SIGNAL);
+ DO_SIGNAL_CHECK(SHUTDOWN3_SIGNAL);
+ DO_SIGNAL_CHECK(BREAK_SIGNAL);
+ }
+
+ // See comments above for using JVM1/JVM2 and UseAltSigs
+ DO_SIGNAL_CHECK(os::Solaris::SIGinterrupt());
+ DO_SIGNAL_CHECK(os::Solaris::SIGasync());
+
+}
+
+typedef int (*os_sigaction_t)(int, const struct sigaction *, struct sigaction *);
+
+static os_sigaction_t os_sigaction = NULL;
+
+void os::Solaris::check_signal_handler(int sig) {
+ char buf[O_BUFLEN];
+ address jvmHandler = NULL;
+
+ struct sigaction act;
+ if (os_sigaction == NULL) {
+ // only trust the default sigaction, in case it has been interposed
+ os_sigaction = (os_sigaction_t)dlsym(RTLD_DEFAULT, "sigaction");
+ if (os_sigaction == NULL) return;
+ }
+
+ os_sigaction(sig, (struct sigaction*)NULL, &act);
+
+ address thisHandler = (act.sa_flags & SA_SIGINFO)
+ ? CAST_FROM_FN_PTR(address, act.sa_sigaction)
+ : CAST_FROM_FN_PTR(address, act.sa_handler) ;
+
+
+ switch(sig) {
+ case SIGSEGV:
+ case SIGBUS:
+ case SIGFPE:
+ case SIGPIPE:
+ case SIGXFSZ:
+ case SIGILL:
+ jvmHandler = CAST_FROM_FN_PTR(address, signalHandler);
+ break;
+
+ case SHUTDOWN1_SIGNAL:
+ case SHUTDOWN2_SIGNAL:
+ case SHUTDOWN3_SIGNAL:
+ case BREAK_SIGNAL:
+ jvmHandler = (address)user_handler();
+ break;
+
+ default:
+ int intrsig = os::Solaris::SIGinterrupt();
+ int asynsig = os::Solaris::SIGasync();
+
+ if (sig == intrsig) {
+ jvmHandler = CAST_FROM_FN_PTR(address, sigINTRHandler);
+ } else if (sig == asynsig) {
+ jvmHandler = CAST_FROM_FN_PTR(address, signalHandler);
+ } else {
+ return;
+ }
+ break;
+ }
+
+
+ if (thisHandler != jvmHandler) {
+ tty->print("Warning: %s handler ", exception_name(sig, buf, O_BUFLEN));
+ tty->print("expected:%s", get_signal_handler_name(jvmHandler, buf, O_BUFLEN));
+ tty->print_cr(" found:%s", get_signal_handler_name(thisHandler, buf, O_BUFLEN));
+ // No need to check this sig any longer
+ sigaddset(&check_signal_done, sig);
+ } else if(os::Solaris::get_our_sigflags(sig) != 0 && act.sa_flags != os::Solaris::get_our_sigflags(sig)) {
+ tty->print("Warning: %s handler flags ", exception_name(sig, buf, O_BUFLEN));
+ tty->print("expected:" PTR32_FORMAT, os::Solaris::get_our_sigflags(sig));
+ tty->print_cr(" found:" PTR32_FORMAT, act.sa_flags);
+ // No need to check this sig any longer
+ sigaddset(&check_signal_done, sig);
+ }
+
+ // Print all the signal handler state
+ if (sigismember(&check_signal_done, sig)) {
+ print_signal_handlers(tty, buf, O_BUFLEN);
+ }
+
+}
+
+void os::Solaris::install_signal_handlers() {
+ bool libjsigdone = false;
+ signal_handlers_are_installed = true;
+
+ // signal-chaining
+ typedef void (*signal_setting_t)();
+ signal_setting_t begin_signal_setting = NULL;
+ signal_setting_t end_signal_setting = NULL;
+ begin_signal_setting = CAST_TO_FN_PTR(signal_setting_t,
+ dlsym(RTLD_DEFAULT, "JVM_begin_signal_setting"));
+ if (begin_signal_setting != NULL) {
+ end_signal_setting = CAST_TO_FN_PTR(signal_setting_t,
+ dlsym(RTLD_DEFAULT, "JVM_end_signal_setting"));
+ get_signal_action = CAST_TO_FN_PTR(get_signal_t,
+ dlsym(RTLD_DEFAULT, "JVM_get_signal_action"));
+ get_libjsig_version = CAST_TO_FN_PTR(version_getting_t,
+ dlsym(RTLD_DEFAULT, "JVM_get_libjsig_version"));
+ libjsig_is_loaded = true;
+ if (os::Solaris::get_libjsig_version != NULL) {
+ libjsigversion = (*os::Solaris::get_libjsig_version)();
+ }
+ assert(UseSignalChaining, "should enable signal-chaining");
+ }
+ if (libjsig_is_loaded) {
+ // Tell libjsig jvm is setting signal handlers
+ (*begin_signal_setting)();
+ }
+
+ set_signal_handler(SIGSEGV, true, true);
+ set_signal_handler(SIGPIPE, true, true);
+ set_signal_handler(SIGXFSZ, true, true);
+ set_signal_handler(SIGBUS, true, true);
+ set_signal_handler(SIGILL, true, true);
+ set_signal_handler(SIGFPE, true, true);
+
+
+ if (os::Solaris::SIGinterrupt() > OLDMAXSIGNUM || os::Solaris::SIGasync() > OLDMAXSIGNUM) {
+
+ // Pre-1.4.1 Libjsig limited to signal chaining signals <= 32 so
+ // can not register overridable signals which might be > 32
+ if (libjsig_is_loaded && libjsigversion <= JSIG_VERSION_1_4_1) {
+ // Tell libjsig jvm has finished setting signal handlers
+ (*end_signal_setting)();
+ libjsigdone = true;
+ }
+ }
+
+ // Never ok to chain our SIGinterrupt
+ set_signal_handler(os::Solaris::SIGinterrupt(), true, false);
+ set_signal_handler(os::Solaris::SIGasync(), true, true);
+
+ if (libjsig_is_loaded && !libjsigdone) {
+ // Tell libjsig jvm finishes setting signal handlers
+ (*end_signal_setting)();
+ }
+
+ // We don't activate signal checker if libjsig is in place, we trust ourselves
+ // and if UserSignalHandler is installed all bets are off
+ if (CheckJNICalls) {
+ if (libjsig_is_loaded) {
+ tty->print_cr("Info: libjsig is activated, all active signal checking is disabled");
+ check_signals = false;
+ }
+ if (AllowUserSignalHandlers) {
+ tty->print_cr("Info: AllowUserSignalHandlers is activated, all active signal checking is disabled");
+ check_signals = false;
+ }
+ }
+}
+
+
+void report_error(const char* file_name, int line_no, const char* title, const char* format, ...);
+
+const char * signames[] = {
+ "SIG0",
+ "SIGHUP", "SIGINT", "SIGQUIT", "SIGILL", "SIGTRAP",
+ "SIGABRT", "SIGEMT", "SIGFPE", "SIGKILL", "SIGBUS",
+ "SIGSEGV", "SIGSYS", "SIGPIPE", "SIGALRM", "SIGTERM",
+ "SIGUSR1", "SIGUSR2", "SIGCLD", "SIGPWR", "SIGWINCH",
+ "SIGURG", "SIGPOLL", "SIGSTOP", "SIGTSTP", "SIGCONT",
+ "SIGTTIN", "SIGTTOU", "SIGVTALRM", "SIGPROF", "SIGXCPU",
+ "SIGXFSZ", "SIGWAITING", "SIGLWP", "SIGFREEZE", "SIGTHAW",
+ "SIGCANCEL", "SIGLOST"
+};
+
+const char* os::exception_name(int exception_code, char* buf, size_t size) {
+ if (0 < exception_code && exception_code <= SIGRTMAX) {
+ // signal
+ if (exception_code < sizeof(signames)/sizeof(const char*)) {
+ jio_snprintf(buf, size, "%s", signames[exception_code]);
+ } else {
+ jio_snprintf(buf, size, "SIG%d", exception_code);
+ }
+ return buf;
+ } else {
+ return NULL;
+ }
+}
+
+// (Static) wrappers for the new libthread API
+int_fnP_thread_t_iP_uP_stack_tP_gregset_t os::Solaris::_thr_getstate;
+int_fnP_thread_t_i_gregset_t os::Solaris::_thr_setstate;
+int_fnP_thread_t_i os::Solaris::_thr_setmutator;
+int_fnP_thread_t os::Solaris::_thr_suspend_mutator;
+int_fnP_thread_t os::Solaris::_thr_continue_mutator;
+
+// (Static) wrappers for the liblgrp API
+os::Solaris::lgrp_home_func_t os::Solaris::_lgrp_home;
+os::Solaris::lgrp_init_func_t os::Solaris::_lgrp_init;
+os::Solaris::lgrp_fini_func_t os::Solaris::_lgrp_fini;
+os::Solaris::lgrp_root_func_t os::Solaris::_lgrp_root;
+os::Solaris::lgrp_children_func_t os::Solaris::_lgrp_children;
+os::Solaris::lgrp_nlgrps_func_t os::Solaris::_lgrp_nlgrps;
+os::Solaris::lgrp_cookie_stale_func_t os::Solaris::_lgrp_cookie_stale;
+os::Solaris::lgrp_cookie_t os::Solaris::_lgrp_cookie = 0;
+
+// (Static) wrapper for meminfo() call.
+os::Solaris::meminfo_func_t os::Solaris::_meminfo = 0;
+
+static address resolve_symbol(const char *name) {
+ address addr;
+
+ addr = (address) dlsym(RTLD_DEFAULT, name);
+ if(addr == NULL) {
+ // RTLD_DEFAULT was not defined on some early versions of 2.5.1
+ addr = (address) dlsym(RTLD_NEXT, name);
+ if(addr == NULL) {
+ fatal(dlerror());
+ }
+ }
+ return addr;
+}
+
+
+
+// isT2_libthread()
+//
+// Routine to determine if we are currently using the new T2 libthread.
+//
+// We determine if we are using T2 by reading /proc/self/lstatus and
+// looking for a thread with the ASLWP bit set. If we find this status
+// bit set, we must assume that we are NOT using T2. The T2 team
+// has approved this algorithm.
+//
+// We need to determine if we are running with the new T2 libthread
+// since setting native thread priorities is handled differently
+// when using this library. All threads created using T2 are bound
+// threads. Calling thr_setprio is meaningless in this case.
+//
+bool isT2_libthread() {
+ int i, rslt;
+ static prheader_t * lwpArray = NULL;
+ static int lwpSize = 0;
+ static int lwpFile = -1;
+ lwpstatus_t * that;
+ int aslwpcount;
+ char lwpName [128];
+ bool isT2 = false;
+
+#define ADR(x) ((uintptr_t)(x))
+#define LWPINDEX(ary,ix) ((lwpstatus_t *)(((ary)->pr_entsize * (ix)) + (ADR((ary) + 1))))
+
+ aslwpcount = 0;
+ lwpSize = 16*1024;
+ lwpArray = ( prheader_t *)NEW_C_HEAP_ARRAY (char, lwpSize);
+ lwpFile = open ("/proc/self/lstatus", O_RDONLY, 0);
+ if (lwpArray == NULL) {
+ if ( ThreadPriorityVerbose ) warning ("Couldn't allocate T2 Check array\n");
+ return(isT2);
+ }
+ if (lwpFile < 0) {
+ if ( ThreadPriorityVerbose ) warning ("Couldn't open /proc/self/lstatus\n");
+ return(isT2);
+ }
+ for (;;) {
+ lseek (lwpFile, 0, SEEK_SET);
+ rslt = read (lwpFile, lwpArray, lwpSize);
+ if ((lwpArray->pr_nent * lwpArray->pr_entsize) <= lwpSize) {
+ break;
+ }
+ FREE_C_HEAP_ARRAY(char, lwpArray);
+ lwpSize = lwpArray->pr_nent * lwpArray->pr_entsize;
+ lwpArray = ( prheader_t *)NEW_C_HEAP_ARRAY (char, lwpSize);
+ if (lwpArray == NULL) {
+ if ( ThreadPriorityVerbose ) warning ("Couldn't allocate T2 Check array\n");
+ return(isT2);
+ }
+ }
+
+ // We got a good snapshot - now iterate over the list.
+ for (i = 0; i < lwpArray->pr_nent; i++ ) {
+ that = LWPINDEX(lwpArray,i);
+ if (that->pr_flags & PR_ASLWP) {
+ aslwpcount++;
+ }
+ }
+ if ( aslwpcount == 0 ) isT2 = true;
+
+ FREE_C_HEAP_ARRAY(char, lwpArray);
+ close (lwpFile);
+ if ( ThreadPriorityVerbose ) {
+ if ( isT2 ) tty->print_cr("We are running with a T2 libthread\n");
+ else tty->print_cr("We are not running with a T2 libthread\n");
+ }
+ return (isT2);
+}
+
+
+void os::Solaris::libthread_init() {
+ address func = (address)dlsym(RTLD_DEFAULT, "_thr_suspend_allmutators");
+
+ // Determine if we are running with the new T2 libthread
+ os::Solaris::set_T2_libthread(isT2_libthread());
+
+ lwp_priocntl_init();
+
+ // RTLD_DEFAULT was not defined on some early versions of 5.5.1
+ if(func == NULL) {
+ func = (address) dlsym(RTLD_NEXT, "_thr_suspend_allmutators");
+ // Guarantee that this VM is running on an new enough OS (5.6 or
+ // later) that it will have a new enough libthread.so.
+ guarantee(func != NULL, "libthread.so is too old.");
+ }
+
+ // Initialize the new libthread getstate API wrappers
+ func = resolve_symbol("thr_getstate");
+ os::Solaris::set_thr_getstate(CAST_TO_FN_PTR(int_fnP_thread_t_iP_uP_stack_tP_gregset_t, func));
+
+ func = resolve_symbol("thr_setstate");
+ os::Solaris::set_thr_setstate(CAST_TO_FN_PTR(int_fnP_thread_t_i_gregset_t, func));
+
+ func = resolve_symbol("thr_setmutator");
+ os::Solaris::set_thr_setmutator(CAST_TO_FN_PTR(int_fnP_thread_t_i, func));
+
+ func = resolve_symbol("thr_suspend_mutator");
+ os::Solaris::set_thr_suspend_mutator(CAST_TO_FN_PTR(int_fnP_thread_t, func));
+
+ func = resolve_symbol("thr_continue_mutator");
+ os::Solaris::set_thr_continue_mutator(CAST_TO_FN_PTR(int_fnP_thread_t, func));
+
+ int size;
+ void (*handler_info_func)(address *, int *);
+ handler_info_func = CAST_TO_FN_PTR(void (*)(address *, int *), resolve_symbol("thr_sighndlrinfo"));
+ handler_info_func(&handler_start, &size);
+ handler_end = handler_start + size;
+}
+
+
+int_fnP_mutex_tP os::Solaris::_mutex_lock;
+int_fnP_mutex_tP os::Solaris::_mutex_trylock;
+int_fnP_mutex_tP os::Solaris::_mutex_unlock;
+int_fnP_mutex_tP_i_vP os::Solaris::_mutex_init;
+int_fnP_mutex_tP os::Solaris::_mutex_destroy;
+int os::Solaris::_mutex_scope = USYNC_THREAD;
+
+int_fnP_cond_tP_mutex_tP_timestruc_tP os::Solaris::_cond_timedwait;
+int_fnP_cond_tP_mutex_tP os::Solaris::_cond_wait;
+int_fnP_cond_tP os::Solaris::_cond_signal;
+int_fnP_cond_tP os::Solaris::_cond_broadcast;
+int_fnP_cond_tP_i_vP os::Solaris::_cond_init;
+int_fnP_cond_tP os::Solaris::_cond_destroy;
+int os::Solaris::_cond_scope = USYNC_THREAD;
+
+void os::Solaris::synchronization_init() {
+ if(UseLWPSynchronization) {
+ os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_lock")));
+ os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_trylock")));
+ os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_unlock")));
+ os::Solaris::set_mutex_init(lwp_mutex_init);
+ os::Solaris::set_mutex_destroy(lwp_mutex_destroy);
+ os::Solaris::set_mutex_scope(USYNC_THREAD);
+
+ os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("_lwp_cond_timedwait")));
+ os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("_lwp_cond_wait")));
+ os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_signal")));
+ os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_broadcast")));
+ os::Solaris::set_cond_init(lwp_cond_init);
+ os::Solaris::set_cond_destroy(lwp_cond_destroy);
+ os::Solaris::set_cond_scope(USYNC_THREAD);
+ }
+ else {
+ os::Solaris::set_mutex_scope(USYNC_THREAD);
+ os::Solaris::set_cond_scope(USYNC_THREAD);
+
+ if(UsePthreads) {
+ os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_lock")));
+ os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_trylock")));
+ os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_unlock")));
+ os::Solaris::set_mutex_init(pthread_mutex_default_init);
+ os::Solaris::set_mutex_destroy(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_destroy")));
+
+ os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("pthread_cond_timedwait")));
+ os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("pthread_cond_wait")));
+ os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_signal")));
+ os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_broadcast")));
+ os::Solaris::set_cond_init(pthread_cond_default_init);
+ os::Solaris::set_cond_destroy(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_destroy")));
+ }
+ else {
+ os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_lock")));
+ os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_trylock")));
+ os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_unlock")));
+ os::Solaris::set_mutex_init(::mutex_init);
+ os::Solaris::set_mutex_destroy(::mutex_destroy);
+
+ os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("cond_timedwait")));
+ os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("cond_wait")));
+ os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_signal")));
+ os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_broadcast")));
+ os::Solaris::set_cond_init(::cond_init);
+ os::Solaris::set_cond_destroy(::cond_destroy);
+ }
+ }
+}
+
+void os::Solaris::liblgrp_init() {
+ void *handle = dlopen("liblgrp.so", RTLD_LAZY);
+ if (handle != NULL) {
+ os::Solaris::set_lgrp_home(CAST_TO_FN_PTR(lgrp_home_func_t, dlsym(handle, "lgrp_home")));
+ os::Solaris::set_lgrp_init(CAST_TO_FN_PTR(lgrp_init_func_t, dlsym(handle, "lgrp_init")));
+ os::Solaris::set_lgrp_fini(CAST_TO_FN_PTR(lgrp_fini_func_t, dlsym(handle, "lgrp_fini")));
+ os::Solaris::set_lgrp_root(CAST_TO_FN_PTR(lgrp_root_func_t, dlsym(handle, "lgrp_root")));
+ os::Solaris::set_lgrp_children(CAST_TO_FN_PTR(lgrp_children_func_t, dlsym(handle, "lgrp_children")));
+ os::Solaris::set_lgrp_nlgrps(CAST_TO_FN_PTR(lgrp_nlgrps_func_t, dlsym(handle, "lgrp_nlgrps")));
+ os::Solaris::set_lgrp_cookie_stale(CAST_TO_FN_PTR(lgrp_cookie_stale_func_t,
+ dlsym(handle, "lgrp_cookie_stale")));
+
+ lgrp_cookie_t c = lgrp_init(LGRP_VIEW_CALLER);
+ set_lgrp_cookie(c);
+ } else {
+ warning("your OS does not support NUMA");
+ }
+}
+
+void os::Solaris::misc_sym_init() {
+ address func = (address)dlsym(RTLD_DEFAULT, "meminfo");
+ if(func == NULL) {
+ func = (address) dlsym(RTLD_NEXT, "meminfo");
+ }
+ if (func != NULL) {
+ os::Solaris::set_meminfo(CAST_TO_FN_PTR(meminfo_func_t, func));
+ }
+}
+
+// Symbol doesn't exist in Solaris 8 pset.h
+#ifndef PS_MYID
+#define PS_MYID -3
+#endif
+
+// int pset_getloadavg(psetid_t pset, double loadavg[], int nelem);
+typedef long (*pset_getloadavg_type)(psetid_t pset, double loadavg[], int nelem);
+static pset_getloadavg_type pset_getloadavg_ptr = NULL;
+
+void init_pset_getloadavg_ptr(void) {
+ pset_getloadavg_ptr =
+ (pset_getloadavg_type)dlsym(RTLD_DEFAULT, "pset_getloadavg");
+ if (PrintMiscellaneous && Verbose && pset_getloadavg_ptr == NULL) {
+ warning("pset_getloadavg function not found");
+ }
+}
+
+int os::Solaris::_dev_zero_fd = -1;
+
+// this is called _before_ the global arguments have been parsed
+void os::init(void) {
+ _initial_pid = getpid();
+
+ max_hrtime = first_hrtime = gethrtime();
+
+ init_random(1234567);
+
+ page_size = sysconf(_SC_PAGESIZE);
+ if (page_size == -1)
+ fatal1("os_solaris.cpp: os::init: sysconf failed (%s)", strerror(errno));
+ init_page_sizes((size_t) page_size);
+
+ Solaris::initialize_system_info();
+
+ int fd = open("/dev/zero", O_RDWR);
+ if (fd < 0) {
+ fatal1("os::init: cannot open /dev/zero (%s)", strerror(errno));
+ } else {
+ Solaris::set_dev_zero_fd(fd);
+
+ // Close on exec, child won't inherit.
+ fcntl(fd, F_SETFD, FD_CLOEXEC);
+ }
+
+ clock_tics_per_sec = CLK_TCK;
+
+ // check if dladdr1() exists; dladdr1 can provide more information than
+ // dladdr for os::dll_address_to_function_name. It comes with SunOS 5.9
+ // and is available on linker patches for 5.7 and 5.8.
+ // libdl.so must have been loaded, this call is just an entry lookup
+ void * hdl = dlopen("libdl.so", RTLD_NOW);
+ if (hdl)
+ dladdr1_func = CAST_TO_FN_PTR(dladdr1_func_type, dlsym(hdl, "dladdr1"));
+
+ // (Solaris only) this switches to calls that actually do locking.
+ ThreadCritical::initialize();
+
+ main_thread = thr_self();
+
+ // Constant minimum stack size allowed. It must be at least
+ // the minimum of what the OS supports (thr_min_stack()), and
+ // enough to allow the thread to get to user bytecode execution.
+ Solaris::min_stack_allowed = MAX2(thr_min_stack(), Solaris::min_stack_allowed);
+ // If the pagesize of the VM is greater than 8K determine the appropriate
+ // number of initial guard pages. The user can change this with the
+ // command line arguments, if needed.
+ if (vm_page_size() > 8*K) {
+ StackYellowPages = 1;
+ StackRedPages = 1;
+ StackShadowPages = round_to((StackShadowPages*8*K), vm_page_size()) / vm_page_size();
+ }
+}
+
+// To install functions for atexit system call
+extern "C" {
+ static void perfMemory_exit_helper() {
+ perfMemory_exit();
+ }
+}
+
+// this is called _after_ the global arguments have been parsed
+jint os::init_2(void) {
+ // try to enable extended file IO ASAP, see 6431278
+ os::Solaris::try_enable_extended_io();
+
+ // Allocate a single page and mark it as readable for safepoint polling. Also
+ // use this first mmap call to check support for MAP_ALIGN.
+ address polling_page = (address)Solaris::mmap_chunk((char*)page_size,
+ page_size,
+ MAP_PRIVATE | MAP_ALIGN,
+ PROT_READ);
+ if (polling_page == NULL) {
+ has_map_align = false;
+ polling_page = (address)Solaris::mmap_chunk(NULL, page_size, MAP_PRIVATE,
+ PROT_READ);
+ }
+
+ os::set_polling_page(polling_page);
+
+#ifndef PRODUCT
+ if( Verbose && PrintMiscellaneous )
+ tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n", (intptr_t)polling_page);
+#endif
+
+ if (!UseMembar) {
+ address mem_serialize_page = (address)Solaris::mmap_chunk( NULL, page_size, MAP_PRIVATE, PROT_READ | PROT_WRITE );
+ guarantee( mem_serialize_page != NULL, "mmap Failed for memory serialize page");
+ os::set_memory_serialize_page( mem_serialize_page );
+
+#ifndef PRODUCT
+ if(Verbose && PrintMiscellaneous)
+ tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n", (intptr_t)mem_serialize_page);
+#endif
+}
+
+ FLAG_SET_DEFAULT(UseLargePages, os::large_page_init());
+
+ // Check minimum allowable stack size for thread creation and to initialize
+ // the java system classes, including StackOverflowError - depends on page
+ // size. Add a page for compiler2 recursion in main thread.
+ // Add in BytesPerWord times page size to account for VM stack during
+ // class initialization depending on 32 or 64 bit VM.
+ guarantee((Solaris::min_stack_allowed >=
+ (StackYellowPages+StackRedPages+StackShadowPages+BytesPerWord
+ COMPILER2_PRESENT(+1)) * page_size),
+ "need to increase Solaris::min_stack_allowed on this platform");
+
+ size_t threadStackSizeInBytes = ThreadStackSize * K;
+ if (threadStackSizeInBytes != 0 &&
+ threadStackSizeInBytes < Solaris::min_stack_allowed) {
+ tty->print_cr("\nThe stack size specified is too small, Specify at least %dk",
+ Solaris::min_stack_allowed/K);
+ return JNI_ERR;
+ }
+
+ // For 64kbps there will be a 64kb page size, which makes
+ // the usable default stack size quite a bit less. Increase the
+ // stack for 64kb (or any > than 8kb) pages, this increases
+ // virtual memory fragmentation (since we're not creating the
+ // stack on a power of 2 boundary. The real fix for this
+ // should be to fix the guard page mechanism.
+
+ if (vm_page_size() > 8*K) {
+ threadStackSizeInBytes = (threadStackSizeInBytes != 0)
+ ? threadStackSizeInBytes +
+ ((StackYellowPages + StackRedPages) * vm_page_size())
+ : 0;
+ ThreadStackSize = threadStackSizeInBytes/K;
+ }
+
+ // Make the stack size a multiple of the page size so that
+ // the yellow/red zones can be guarded.
+ JavaThread::set_stack_size_at_create(round_to(threadStackSizeInBytes,
+ vm_page_size()));
+
+ Solaris::libthread_init();
+ if (UseNUMA) {
+ Solaris::liblgrp_init();
+ }
+ Solaris::misc_sym_init();
+ Solaris::signal_sets_init();
+ Solaris::init_signal_mem();
+ Solaris::install_signal_handlers();
+
+ if (libjsigversion < JSIG_VERSION_1_4_1) {
+ Maxlibjsigsigs = OLDMAXSIGNUM;
+ }
+
+ // initialize synchronization primitives to use either thread or
+ // lwp synchronization (controlled by UseLWPSynchronization)
+ Solaris::synchronization_init();
+
+ if (MaxFDLimit) {
+ // set the number of file descriptors to max. print out error
+ // if getrlimit/setrlimit fails but continue regardless.
+ struct rlimit nbr_files;
+ int status = getrlimit(RLIMIT_NOFILE, &nbr_files);
+ if (status != 0) {
+ if (PrintMiscellaneous && (Verbose || WizardMode))
+ perror("os::init_2 getrlimit failed");
+ } else {
+ nbr_files.rlim_cur = nbr_files.rlim_max;
+ status = setrlimit(RLIMIT_NOFILE, &nbr_files);
+ if (status != 0) {
+ if (PrintMiscellaneous && (Verbose || WizardMode))
+ perror("os::init_2 setrlimit failed");
+ }
+ }
+ }
+
+ // Initialize HPI.
+ jint hpi_result = hpi::initialize();
+ if (hpi_result != JNI_OK) {
+ tty->print_cr("There was an error trying to initialize the HPI library.");
+ return hpi_result;
+ }
+
+ // Calculate theoretical max. size of Threads to guard gainst
+ // artifical out-of-memory situations, where all available address-
+ // space has been reserved by thread stacks. Default stack size is 1Mb.
+ size_t pre_thread_stack_size = (JavaThread::stack_size_at_create()) ?
+ JavaThread::stack_size_at_create() : (1*K*K);
+ assert(pre_thread_stack_size != 0, "Must have a stack");
+ // Solaris has a maximum of 4Gb of user programs. Calculate the thread limit when
+ // we should start doing Virtual Memory banging. Currently when the threads will
+ // have used all but 200Mb of space.
+ size_t max_address_space = ((unsigned int)4 * K * K * K) - (200 * K * K);
+ Solaris::_os_thread_limit = max_address_space / pre_thread_stack_size;
+
+ // at-exit methods are called in the reverse order of their registration.
+ // In Solaris 7 and earlier, atexit functions are called on return from
+ // main or as a result of a call to exit(3C). There can be only 32 of
+ // these functions registered and atexit() does not set errno. In Solaris
+ // 8 and later, there is no limit to the number of functions registered
+ // and atexit() sets errno. In addition, in Solaris 8 and later, atexit
+ // functions are called upon dlclose(3DL) in addition to return from main
+ // and exit(3C).
+
+ if (PerfAllowAtExitRegistration) {
+ // only register atexit functions if PerfAllowAtExitRegistration is set.
+ // atexit functions can be delayed until process exit time, which
+ // can be problematic for embedded VM situations. Embedded VMs should
+ // call DestroyJavaVM() to assure that VM resources are released.
+
+ // note: perfMemory_exit_helper atexit function may be removed in
+ // the future if the appropriate cleanup code can be added to the
+ // VM_Exit VMOperation's doit method.
+ if (atexit(perfMemory_exit_helper) != 0) {
+ warning("os::init2 atexit(perfMemory_exit_helper) failed");
+ }
+ }
+
+ // Init pset_loadavg function pointer
+ init_pset_getloadavg_ptr();
+
+ return JNI_OK;
+}
+
+
+// Mark the polling page as unreadable
+void os::make_polling_page_unreadable(void) {
+ if( mprotect((char *)_polling_page, page_size, PROT_NONE) != 0 )
+ fatal("Could not disable polling page");
+};
+
+// Mark the polling page as readable
+void os::make_polling_page_readable(void) {
+ if( mprotect((char *)_polling_page, page_size, PROT_READ) != 0 )
+ fatal("Could not enable polling page");
+};
+
+// OS interface.
+
+int os::stat(const char *path, struct stat *sbuf) {
+ char pathbuf[MAX_PATH];
+ if (strlen(path) > MAX_PATH - 1) {
+ errno = ENAMETOOLONG;
+ return -1;
+ }
+ hpi::native_path(strcpy(pathbuf, path));
+ return ::stat(pathbuf, sbuf);
+}
+
+
+bool os::check_heap(bool force) { return true; }
+
+typedef int (*vsnprintf_t)(char* buf, size_t count, const char* fmt, va_list argptr);
+static vsnprintf_t sol_vsnprintf = NULL;
+
+int local_vsnprintf(char* buf, size_t count, const char* fmt, va_list argptr) {
+ if (!sol_vsnprintf) {
+ //search for the named symbol in the objects that were loaded after libjvm
+ void* where = RTLD_NEXT;
+ if ((sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "__vsnprintf"))) == NULL)
+ sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "vsnprintf"));
+ if (!sol_vsnprintf){
+ //search for the named symbol in the objects that were loaded before libjvm
+ where = RTLD_DEFAULT;
+ if ((sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "__vsnprintf"))) == NULL)
+ sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "vsnprintf"));
+ assert(sol_vsnprintf != NULL, "vsnprintf not found");
+ }
+ }
+ return (*sol_vsnprintf)(buf, count, fmt, argptr);
+}
+
+
+// Is a (classpath) directory empty?
+bool os::dir_is_empty(const char* path) {
+ DIR *dir = NULL;
+ struct dirent *ptr;
+
+ dir = opendir(path);
+ if (dir == NULL) return true;
+
+ /* Scan the directory */
+ bool result = true;
+ char buf[sizeof(struct dirent) + MAX_PATH];
+ struct dirent *dbuf = (struct dirent *) buf;
+ while (result && (ptr = readdir(dir, dbuf)) != NULL) {
+ if (strcmp(ptr->d_name, ".") != 0 && strcmp(ptr->d_name, "..") != 0) {
+ result = false;
+ }
+ }
+ closedir(dir);
+ return result;
+}
+
+// create binary file, rewriting existing file if required
+int os::create_binary_file(const char* path, bool rewrite_existing) {
+ int oflags = O_WRONLY | O_CREAT;
+ if (!rewrite_existing) {
+ oflags |= O_EXCL;
+ }
+ return ::open64(path, oflags, S_IREAD | S_IWRITE);
+}
+
+// return current position of file pointer
+jlong os::current_file_offset(int fd) {
+ return (jlong)::lseek64(fd, (off64_t)0, SEEK_CUR);
+}
+
+// move file pointer to the specified offset
+jlong os::seek_to_file_offset(int fd, jlong offset) {
+ return (jlong)::lseek64(fd, (off64_t)offset, SEEK_SET);
+}
+
+// Map a block of memory.
+char* os::map_memory(int fd, const char* file_name, size_t file_offset,
+ char *addr, size_t bytes, bool read_only,
+ bool allow_exec) {
+ int prot;
+ int flags;
+
+ if (read_only) {
+ prot = PROT_READ;
+ flags = MAP_SHARED;
+ } else {
+ prot = PROT_READ | PROT_WRITE;
+ flags = MAP_PRIVATE;
+ }
+
+ if (allow_exec) {
+ prot |= PROT_EXEC;
+ }
+
+ if (addr != NULL) {
+ flags |= MAP_FIXED;
+ }
+
+ char* mapped_address = (char*)mmap(addr, (size_t)bytes, prot, flags,
+ fd, file_offset);
+ if (mapped_address == MAP_FAILED) {
+ return NULL;
+ }
+ return mapped_address;
+}
+
+
+// Remap a block of memory.
+char* os::remap_memory(int fd, const char* file_name, size_t file_offset,
+ char *addr, size_t bytes, bool read_only,
+ bool allow_exec) {
+ // same as map_memory() on this OS
+ return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only,
+ allow_exec);
+}
+
+
+// Unmap a block of memory.
+bool os::unmap_memory(char* addr, size_t bytes) {
+ return munmap(addr, bytes) == 0;
+}
+
+void os::pause() {
+ char filename[MAX_PATH];
+ if (PauseAtStartupFile && PauseAtStartupFile[0]) {
+ jio_snprintf(filename, MAX_PATH, PauseAtStartupFile);
+ } else {
+ jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id());
+ }
+
+ int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666);
+ if (fd != -1) {
+ struct stat buf;
+ close(fd);
+ while (::stat(filename, &buf) == 0) {
+ (void)::poll(NULL, 0, 100);
+ }
+ } else {
+ jio_fprintf(stderr,
+ "Could not open pause file '%s', continuing immediately.\n", filename);
+ }
+}
+
+#ifndef PRODUCT
+#ifdef INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS
+// Turn this on if you need to trace synch operations.
+// Set RECORD_SYNCH_LIMIT to a large-enough value,
+// and call record_synch_enable and record_synch_disable
+// around the computation of interest.
+
+void record_synch(char* name, bool returning); // defined below
+
+class RecordSynch {
+ char* _name;
+ public:
+ RecordSynch(char* name) :_name(name)
+ { record_synch(_name, false); }
+ ~RecordSynch() { record_synch(_name, true); }
+};
+
+#define CHECK_SYNCH_OP(ret, name, params, args, inner) \
+extern "C" ret name params { \
+ typedef ret name##_t params; \
+ static name##_t* implem = NULL; \
+ static int callcount = 0; \
+ if (implem == NULL) { \
+ implem = (name##_t*) dlsym(RTLD_NEXT, #name); \
+ if (implem == NULL) fatal(dlerror()); \
+ } \
+ ++callcount; \
+ RecordSynch _rs(#name); \
+ inner; \
+ return implem args; \
+}
+// in dbx, examine callcounts this way:
+// for n in $(eval whereis callcount | awk '{print $2}'); do print $n; done
+
+#define CHECK_POINTER_OK(p) \
+ (Universe::perm_gen() == NULL || !Universe::is_reserved_heap((oop)(p)))
+#define CHECK_MU \
+ if (!CHECK_POINTER_OK(mu)) fatal("Mutex must be in C heap only.");
+#define CHECK_CV \
+ if (!CHECK_POINTER_OK(cv)) fatal("Condvar must be in C heap only.");
+#define CHECK_P(p) \
+ if (!CHECK_POINTER_OK(p)) fatal(false, "Pointer must be in C heap only.");
+
+#define CHECK_MUTEX(mutex_op) \
+CHECK_SYNCH_OP(int, mutex_op, (mutex_t *mu), (mu), CHECK_MU);
+
+CHECK_MUTEX( mutex_lock)
+CHECK_MUTEX( _mutex_lock)
+CHECK_MUTEX( mutex_unlock)
+CHECK_MUTEX(_mutex_unlock)
+CHECK_MUTEX( mutex_trylock)
+CHECK_MUTEX(_mutex_trylock)
+
+#define CHECK_COND(cond_op) \
+CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu), (cv, mu), CHECK_MU;CHECK_CV);
+
+CHECK_COND( cond_wait);
+CHECK_COND(_cond_wait);
+CHECK_COND(_cond_wait_cancel);
+
+#define CHECK_COND2(cond_op) \
+CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu, timestruc_t* ts), (cv, mu, ts), CHECK_MU;CHECK_CV);
+
+CHECK_COND2( cond_timedwait);
+CHECK_COND2(_cond_timedwait);
+CHECK_COND2(_cond_timedwait_cancel);
+
+// do the _lwp_* versions too
+#define mutex_t lwp_mutex_t
+#define cond_t lwp_cond_t
+CHECK_MUTEX( _lwp_mutex_lock)
+CHECK_MUTEX( _lwp_mutex_unlock)
+CHECK_MUTEX( _lwp_mutex_trylock)
+CHECK_MUTEX( __lwp_mutex_lock)
+CHECK_MUTEX( __lwp_mutex_unlock)
+CHECK_MUTEX( __lwp_mutex_trylock)
+CHECK_MUTEX(___lwp_mutex_lock)
+CHECK_MUTEX(___lwp_mutex_unlock)
+
+CHECK_COND( _lwp_cond_wait);
+CHECK_COND( __lwp_cond_wait);
+CHECK_COND(___lwp_cond_wait);
+
+CHECK_COND2( _lwp_cond_timedwait);
+CHECK_COND2( __lwp_cond_timedwait);
+#undef mutex_t
+#undef cond_t
+
+CHECK_SYNCH_OP(int, _lwp_suspend2, (int lwp, int *n), (lwp, n), 0);
+CHECK_SYNCH_OP(int,__lwp_suspend2, (int lwp, int *n), (lwp, n), 0);
+CHECK_SYNCH_OP(int, _lwp_kill, (int lwp, int n), (lwp, n), 0);
+CHECK_SYNCH_OP(int,__lwp_kill, (int lwp, int n), (lwp, n), 0);
+CHECK_SYNCH_OP(int, _lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p));
+CHECK_SYNCH_OP(int,__lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p));
+CHECK_SYNCH_OP(int, _lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV);
+CHECK_SYNCH_OP(int,__lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV);
+
+
+// recording machinery:
+
+enum { RECORD_SYNCH_LIMIT = 200 };
+char* record_synch_name[RECORD_SYNCH_LIMIT];
+void* record_synch_arg0ptr[RECORD_SYNCH_LIMIT];
+bool record_synch_returning[RECORD_SYNCH_LIMIT];
+thread_t record_synch_thread[RECORD_SYNCH_LIMIT];
+int record_synch_count = 0;
+bool record_synch_enabled = false;
+
+// in dbx, examine recorded data this way:
+// for n in name arg0ptr returning thread; do print record_synch_$n[0..record_synch_count-1]; done
+
+void record_synch(char* name, bool returning) {
+ if (record_synch_enabled) {
+ if (record_synch_count < RECORD_SYNCH_LIMIT) {
+ record_synch_name[record_synch_count] = name;
+ record_synch_returning[record_synch_count] = returning;
+ record_synch_thread[record_synch_count] = thr_self();
+ record_synch_arg0ptr[record_synch_count] = &name;
+ record_synch_count++;
+ }
+ // put more checking code here:
+ // ...
+ }
+}
+
+void record_synch_enable() {
+ // start collecting trace data, if not already doing so
+ if (!record_synch_enabled) record_synch_count = 0;
+ record_synch_enabled = true;
+}
+
+void record_synch_disable() {
+ // stop collecting trace data
+ record_synch_enabled = false;
+}
+
+#endif // INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS
+#endif // PRODUCT
+
+const intptr_t thr_time_off = (intptr_t)(&((prusage_t *)(NULL))->pr_utime);
+const intptr_t thr_time_size = (intptr_t)(&((prusage_t *)(NULL))->pr_ttime) -
+ (intptr_t)(&((prusage_t *)(NULL))->pr_utime);
+
+
+// JVMTI & JVM monitoring and management support
+// The thread_cpu_time() and current_thread_cpu_time() are only
+// supported if is_thread_cpu_time_supported() returns true.
+// They are not supported on Solaris T1.
+
+// current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool)
+// are used by JVM M&M and JVMTI to get user+sys or user CPU time
+// of a thread.
+//
+// current_thread_cpu_time() and thread_cpu_time(Thread *)
+// returns the fast estimate available on the platform.
+
+// hrtime_t gethrvtime() return value includes
+// user time but does not include system time
+jlong os::current_thread_cpu_time() {
+ return (jlong) gethrvtime();
+}
+
+jlong os::thread_cpu_time(Thread *thread) {
+ // return user level CPU time only to be consistent with
+ // what current_thread_cpu_time returns.
+ // thread_cpu_time_info() must be changed if this changes
+ return os::thread_cpu_time(thread, false /* user time only */);
+}
+
+jlong os::current_thread_cpu_time(bool user_sys_cpu_time) {
+ if (user_sys_cpu_time) {
+ return os::thread_cpu_time(Thread::current(), user_sys_cpu_time);
+ } else {
+ return os::current_thread_cpu_time();
+ }
+}
+
+jlong os::thread_cpu_time(Thread *thread, bool user_sys_cpu_time) {
+ char proc_name[64];
+ int count;
+ prusage_t prusage;
+ jlong lwp_time;
+ int fd;
+
+ sprintf(proc_name, "/proc/%d/lwp/%d/lwpusage",
+ getpid(),
+ thread->osthread()->lwp_id());
+ fd = open(proc_name, O_RDONLY);
+ if ( fd == -1 ) return -1;
+
+ do {
+ count = pread(fd,
+ (void *)&prusage.pr_utime,
+ thr_time_size,
+ thr_time_off);
+ } while (count < 0 && errno == EINTR);
+ close(fd);
+ if ( count < 0 ) return -1;
+
+ if (user_sys_cpu_time) {
+ // user + system CPU time
+ lwp_time = (((jlong)prusage.pr_stime.tv_sec +
+ (jlong)prusage.pr_utime.tv_sec) * (jlong)1000000000) +
+ (jlong)prusage.pr_stime.tv_nsec +
+ (jlong)prusage.pr_utime.tv_nsec;
+ } else {
+ // user level CPU time only
+ lwp_time = ((jlong)prusage.pr_utime.tv_sec * (jlong)1000000000) +
+ (jlong)prusage.pr_utime.tv_nsec;
+ }
+
+ return(lwp_time);
+}
+
+void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) {
+ info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits
+ info_ptr->may_skip_backward = false; // elapsed time not wall time
+ info_ptr->may_skip_forward = false; // elapsed time not wall time
+ info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned
+}
+
+void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) {
+ info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits
+ info_ptr->may_skip_backward = false; // elapsed time not wall time
+ info_ptr->may_skip_forward = false; // elapsed time not wall time
+ info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned
+}
+
+bool os::is_thread_cpu_time_supported() {
+ if ( os::Solaris::T2_libthread() || UseBoundThreads ) {
+ return true;
+ } else {
+ return false;
+ }
+}
+
+// System loadavg support. Returns -1 if load average cannot be obtained.
+// Return the load average for our processor set if the primitive exists
+// (Solaris 9 and later). Otherwise just return system wide loadavg.
+int os::loadavg(double loadavg[], int nelem) {
+ if (pset_getloadavg_ptr != NULL) {
+ return (*pset_getloadavg_ptr)(PS_MYID, loadavg, nelem);
+ } else {
+ return ::getloadavg(loadavg, nelem);
+ }
+}
+
+//---------------------------------------------------------------------------------
+#ifndef PRODUCT
+
+static address same_page(address x, address y) {
+ intptr_t page_bits = -os::vm_page_size();
+ if ((intptr_t(x) & page_bits) == (intptr_t(y) & page_bits))
+ return x;
+ else if (x > y)
+ return (address)(intptr_t(y) | ~page_bits) + 1;
+ else
+ return (address)(intptr_t(y) & page_bits);
+}
+
+bool os::find(address addr) {
+ Dl_info dlinfo;
+ memset(&dlinfo, 0, sizeof(dlinfo));
+ if (dladdr(addr, &dlinfo)) {
+#ifdef _LP64
+ tty->print("0x%016lx: ", addr);
+#else
+ tty->print("0x%08x: ", addr);
+#endif
+ if (dlinfo.dli_sname != NULL)
+ tty->print("%s+%#lx", dlinfo.dli_sname, addr-(intptr_t)dlinfo.dli_saddr);
+ else if (dlinfo.dli_fname)
+ tty->print("<offset %#lx>", addr-(intptr_t)dlinfo.dli_fbase);
+ else
+ tty->print("<absolute address>");
+ if (dlinfo.dli_fname) tty->print(" in %s", dlinfo.dli_fname);
+#ifdef _LP64
+ if (dlinfo.dli_fbase) tty->print(" at 0x%016lx", dlinfo.dli_fbase);
+#else
+ if (dlinfo.dli_fbase) tty->print(" at 0x%08x", dlinfo.dli_fbase);
+#endif
+ tty->cr();
+
+ if (Verbose) {
+ // decode some bytes around the PC
+ address begin = same_page(addr-40, addr);
+ address end = same_page(addr+40, addr);
+ address lowest = (address) dlinfo.dli_sname;
+ if (!lowest) lowest = (address) dlinfo.dli_fbase;
+ if (begin < lowest) begin = lowest;
+ Dl_info dlinfo2;
+ if (dladdr(end, &dlinfo2) && dlinfo2.dli_saddr != dlinfo.dli_saddr
+ && end > dlinfo2.dli_saddr && dlinfo2.dli_saddr > begin)
+ end = (address) dlinfo2.dli_saddr;
+ Disassembler::decode(begin, end);
+ }
+ return true;
+ }
+ return false;
+}
+
+#endif
+
+
+// Following function has been added to support HotSparc's libjvm.so running
+// under Solaris production JDK 1.2.2 / 1.3.0. These came from
+// src/solaris/hpi/native_threads in the EVM codebase.
+//
+// NOTE: This is no longer needed in the 1.3.1 and 1.4 production release
+// libraries and should thus be removed. We will leave it behind for a while
+// until we no longer want to able to run on top of 1.3.0 Solaris production
+// JDK. See 4341971.
+
+#define STACK_SLACK 0x800
+
+extern "C" {
+ intptr_t sysThreadAvailableStackWithSlack() {
+ stack_t st;
+ intptr_t retval, stack_top;
+ retval = thr_stksegment(&st);
+ assert(retval == 0, "incorrect return value from thr_stksegment");
+ assert((address)&st < (address)st.ss_sp, "Invalid stack base returned");
+ assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned");
+ stack_top=(intptr_t)st.ss_sp-st.ss_size;
+ return ((intptr_t)&stack_top - stack_top - STACK_SLACK);
+ }
+}
+
+// Just to get the Kernel build to link on solaris for testing.
+
+extern "C" {
+class ASGCT_CallTrace;
+void AsyncGetCallTrace(ASGCT_CallTrace *trace, jint depth, void* ucontext)
+ KERNEL_RETURN;
+}
+
+
+// ObjectMonitor park-unpark infrastructure ...
+//
+// We implement Solaris and Linux PlatformEvents with the
+// obvious condvar-mutex-flag triple.
+// Another alternative that works quite well is pipes:
+// Each PlatformEvent consists of a pipe-pair.
+// The thread associated with the PlatformEvent
+// calls park(), which reads from the input end of the pipe.
+// Unpark() writes into the other end of the pipe.
+// The write-side of the pipe must be set NDELAY.
+// Unfortunately pipes consume a large # of handles.
+// Native solaris lwp_park() and lwp_unpark() work nicely, too.
+// Using pipes for the 1st few threads might be workable, however.
+//
+// park() is permitted to return spuriously.
+// Callers of park() should wrap the call to park() in
+// an appropriate loop. A litmus test for the correct
+// usage of park is the following: if park() were modified
+// to immediately return 0 your code should still work,
+// albeit degenerating to a spin loop.
+//
+// An interesting optimization for park() is to use a trylock()
+// to attempt to acquire the mutex. If the trylock() fails
+// then we know that a concurrent unpark() operation is in-progress.
+// in that case the park() code could simply set _count to 0
+// and return immediately. The subsequent park() operation *might*
+// return immediately. That's harmless as the caller of park() is
+// expected to loop. By using trylock() we will have avoided a
+// avoided a context switch caused by contention on the per-thread mutex.
+//
+// TODO-FIXME:
+// 1. Reconcile Doug's JSR166 j.u.c park-unpark with the
+// objectmonitor implementation.
+// 2. Collapse the JSR166 parker event, and the
+// objectmonitor ParkEvent into a single "Event" construct.
+// 3. In park() and unpark() add:
+// assert (Thread::current() == AssociatedWith).
+// 4. add spurious wakeup injection on a -XX:EarlyParkReturn=N switch.
+// 1-out-of-N park() operations will return immediately.
+//
+// _Event transitions in park()
+// -1 => -1 : illegal
+// 1 => 0 : pass - return immediately
+// 0 => -1 : block
+//
+// _Event serves as a restricted-range semaphore.
+//
+// Another possible encoding of _Event would be with
+// explicit "PARKED" == 01b and "SIGNALED" == 10b bits.
+//
+// TODO-FIXME: add DTRACE probes for:
+// 1. Tx parks
+// 2. Ty unparks Tx
+// 3. Tx resumes from park
+
+
+// value determined through experimentation
+#define ROUNDINGFIX 11
+
+// utility to compute the abstime argument to timedwait.
+// TODO-FIXME: switch from compute_abstime() to unpackTime().
+
+static timestruc_t* compute_abstime(timestruc_t* abstime, jlong millis) {
+ // millis is the relative timeout time
+ // abstime will be the absolute timeout time
+ if (millis < 0) millis = 0;
+ struct timeval now;
+ int status = gettimeofday(&now, NULL);
+ assert(status == 0, "gettimeofday");
+ jlong seconds = millis / 1000;
+ jlong max_wait_period;
+
+ if (UseLWPSynchronization) {
+ // forward port of fix for 4275818 (not sleeping long enough)
+ // There was a bug in Solaris 6, 7 and pre-patch 5 of 8 where
+ // _lwp_cond_timedwait() used a round_down algorithm rather
+ // than a round_up. For millis less than our roundfactor
+ // it rounded down to 0 which doesn't meet the spec.
+ // For millis > roundfactor we may return a bit sooner, but
+ // since we can not accurately identify the patch level and
+ // this has already been fixed in Solaris 9 and 8 we will
+ // leave it alone rather than always rounding down.
+
+ if (millis > 0 && millis < ROUNDINGFIX) millis = ROUNDINGFIX;
+ // It appears that when we go directly through Solaris _lwp_cond_timedwait()
+ // the acceptable max time threshold is smaller than for libthread on 2.5.1 and 2.6
+ max_wait_period = 21000000;
+ } else {
+ max_wait_period = 50000000;
+ }
+ millis %= 1000;
+ if (seconds > max_wait_period) { // see man cond_timedwait(3T)
+ seconds = max_wait_period;
+ }
+ abstime->tv_sec = now.tv_sec + seconds;
+ long usec = now.tv_usec + millis * 1000;
+ if (usec >= 1000000) {
+ abstime->tv_sec += 1;
+ usec -= 1000000;
+ }
+ abstime->tv_nsec = usec * 1000;
+ return abstime;
+}
+
+// Test-and-clear _Event, always leaves _Event set to 0, returns immediately.
+// Conceptually TryPark() should be equivalent to park(0).
+
+int os::PlatformEvent::TryPark() {
+ for (;;) {
+ const int v = _Event ;
+ guarantee ((v == 0) || (v == 1), "invariant") ;
+ if (Atomic::cmpxchg (0, &_Event, v) == v) return v ;
+ }
+}
+
+void os::PlatformEvent::park() { // AKA: down()
+ // Invariant: Only the thread associated with the Event/PlatformEvent
+ // may call park().
+ int v ;
+ for (;;) {
+ v = _Event ;
+ if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ;
+ }
+ guarantee (v >= 0, "invariant") ;
+ if (v == 0) {
+ // Do this the hard way by blocking ...
+ // See http://monaco.sfbay/detail.jsf?cr=5094058.
+ // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking.
+ // Only for SPARC >= V8PlusA
+#if defined(__sparc) && defined(COMPILER2)
+ if (ClearFPUAtPark) { _mark_fpu_nosave() ; }
+#endif
+ int status = os::Solaris::mutex_lock(_mutex);
+ assert_status(status == 0, status, "mutex_lock");
+ guarantee (_nParked == 0, "invariant") ;
+ ++ _nParked ;
+ while (_Event < 0) {
+ // for some reason, under 2.7 lwp_cond_wait() may return ETIME ...
+ // Treat this the same as if the wait was interrupted
+ // With usr/lib/lwp going to kernel, always handle ETIME
+ status = os::Solaris::cond_wait(_cond, _mutex);
+ if (status == ETIME) status = EINTR ;
+ assert_status(status == 0 || status == EINTR, status, "cond_wait");
+ }
+ -- _nParked ;
+ _Event = 0 ;
+ status = os::Solaris::mutex_unlock(_mutex);
+ assert_status(status == 0, status, "mutex_unlock");
+ }
+}
+
+int os::PlatformEvent::park(jlong millis) {
+ guarantee (_nParked == 0, "invariant") ;
+ int v ;
+ for (;;) {
+ v = _Event ;
+ if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ;
+ }
+ guarantee (v >= 0, "invariant") ;
+ if (v != 0) return OS_OK ;
+
+ int ret = OS_TIMEOUT;
+ timestruc_t abst;
+ compute_abstime (&abst, millis);
+
+ // See http://monaco.sfbay/detail.jsf?cr=5094058.
+ // For Solaris SPARC set fprs.FEF=0 prior to parking.
+ // Only for SPARC >= V8PlusA
+#if defined(__sparc) && defined(COMPILER2)
+ if (ClearFPUAtPark) { _mark_fpu_nosave() ; }
+#endif
+ int status = os::Solaris::mutex_lock(_mutex);
+ assert_status(status == 0, status, "mutex_lock");
+ guarantee (_nParked == 0, "invariant") ;
+ ++ _nParked ;
+ while (_Event < 0) {
+ int status = os::Solaris::cond_timedwait(_cond, _mutex, &abst);
+ assert_status(status == 0 || status == EINTR ||
+ status == ETIME || status == ETIMEDOUT,
+ status, "cond_timedwait");
+ if (!FilterSpuriousWakeups) break ; // previous semantics
+ if (status == ETIME || status == ETIMEDOUT) break ;
+ // We consume and ignore EINTR and spurious wakeups.
+ }
+ -- _nParked ;
+ if (_Event >= 0) ret = OS_OK ;
+ _Event = 0 ;
+ status = os::Solaris::mutex_unlock(_mutex);
+ assert_status(status == 0, status, "mutex_unlock");
+ return ret;
+}
+
+void os::PlatformEvent::unpark() {
+ int v, AnyWaiters;
+
+ // Increment _Event.
+ // Another acceptable implementation would be to simply swap 1
+ // into _Event:
+ // if (Swap (&_Event, 1) < 0) {
+ // mutex_lock (_mutex) ; AnyWaiters = nParked; mutex_unlock (_mutex) ;
+ // if (AnyWaiters) cond_signal (_cond) ;
+ // }
+
+ for (;;) {
+ v = _Event ;
+ if (v > 0) {
+ // The LD of _Event could have reordered or be satisfied
+ // by a read-aside from this processor's write buffer.
+ // To avoid problems execute a barrier and then
+ // ratify the value. A degenerate CAS() would also work.
+ // Viz., CAS (v+0, &_Event, v) == v).
+ OrderAccess::fence() ;
+ if (_Event == v) return ;
+ continue ;
+ }
+ if (Atomic::cmpxchg (v+1, &_Event, v) == v) break ;
+ }
+
+ // If the thread associated with the event was parked, wake it.
+ if (v < 0) {
+ int status ;
+ // Wait for the thread assoc with the PlatformEvent to vacate.
+ status = os::Solaris::mutex_lock(_mutex);
+ assert_status(status == 0, status, "mutex_lock");
+ AnyWaiters = _nParked ;
+ status = os::Solaris::mutex_unlock(_mutex);
+ assert_status(status == 0, status, "mutex_unlock");
+ guarantee (AnyWaiters == 0 || AnyWaiters == 1, "invariant") ;
+ if (AnyWaiters != 0) {
+ // We intentional signal *after* dropping the lock
+ // to avoid a common class of futile wakeups.
+ status = os::Solaris::cond_signal(_cond);
+ assert_status(status == 0, status, "cond_signal");
+ }
+ }
+}
+
+// JSR166
+// -------------------------------------------------------
+
+/*
+ * The solaris and linux implementations of park/unpark are fairly
+ * conservative for now, but can be improved. They currently use a
+ * mutex/condvar pair, plus _counter.
+ * Park decrements _counter if > 0, else does a condvar wait. Unpark
+ * sets count to 1 and signals condvar. Only one thread ever waits
+ * on the condvar. Contention seen when trying to park implies that someone
+ * is unparking you, so don't wait. And spurious returns are fine, so there
+ * is no need to track notifications.
+ */
+
+#define NANOSECS_PER_SEC 1000000000
+#define NANOSECS_PER_MILLISEC 1000000
+#define MAX_SECS 100000000
+
+/*
+ * This code is common to linux and solaris and will be moved to a
+ * common place in dolphin.
+ *
+ * The passed in time value is either a relative time in nanoseconds
+ * or an absolute time in milliseconds. Either way it has to be unpacked
+ * into suitable seconds and nanoseconds components and stored in the
+ * given timespec structure.
+ * Given time is a 64-bit value and the time_t used in the timespec is only
+ * a signed-32-bit value (except on 64-bit Linux) we have to watch for
+ * overflow if times way in the future are given. Further on Solaris versions
+ * prior to 10 there is a restriction (see cond_timedwait) that the specified
+ * number of seconds, in abstime, is less than current_time + 100,000,000.
+ * As it will be 28 years before "now + 100000000" will overflow we can
+ * ignore overflow and just impose a hard-limit on seconds using the value
+ * of "now + 100,000,000". This places a limit on the timeout of about 3.17
+ * years from "now".
+ */
+static void unpackTime(timespec* absTime, bool isAbsolute, jlong time) {
+ assert (time > 0, "convertTime");
+
+ struct timeval now;
+ int status = gettimeofday(&now, NULL);
+ assert(status == 0, "gettimeofday");
+
+ time_t max_secs = now.tv_sec + MAX_SECS;
+
+ if (isAbsolute) {
+ jlong secs = time / 1000;
+ if (secs > max_secs) {
+ absTime->tv_sec = max_secs;
+ }
+ else {
+ absTime->tv_sec = secs;
+ }
+ absTime->tv_nsec = (time % 1000) * NANOSECS_PER_MILLISEC;
+ }
+ else {
+ jlong secs = time / NANOSECS_PER_SEC;
+ if (secs >= MAX_SECS) {
+ absTime->tv_sec = max_secs;
+ absTime->tv_nsec = 0;
+ }
+ else {
+ absTime->tv_sec = now.tv_sec + secs;
+ absTime->tv_nsec = (time % NANOSECS_PER_SEC) + now.tv_usec*1000;
+ if (absTime->tv_nsec >= NANOSECS_PER_SEC) {
+ absTime->tv_nsec -= NANOSECS_PER_SEC;
+ ++absTime->tv_sec; // note: this must be <= max_secs
+ }
+ }
+ }
+ assert(absTime->tv_sec >= 0, "tv_sec < 0");
+ assert(absTime->tv_sec <= max_secs, "tv_sec > max_secs");
+ assert(absTime->tv_nsec >= 0, "tv_nsec < 0");
+ assert(absTime->tv_nsec < NANOSECS_PER_SEC, "tv_nsec >= nanos_per_sec");
+}
+
+void Parker::park(bool isAbsolute, jlong time) {
+
+ // Optional fast-path check:
+ // Return immediately if a permit is available.
+ if (_counter > 0) {
+ _counter = 0 ;
+ return ;
+ }
+
+ // Optional fast-exit: Check interrupt before trying to wait
+ Thread* thread = Thread::current();
+ assert(thread->is_Java_thread(), "Must be JavaThread");
+ JavaThread *jt = (JavaThread *)thread;
+ if (Thread::is_interrupted(thread, false)) {
+ return;
+ }
+
+ // First, demultiplex/decode time arguments
+ timespec absTime;
+ if (time < 0) { // don't wait at all
+ return;
+ }
+ if (time > 0) {
+ // Warning: this code might be exposed to the old Solaris time
+ // round-down bugs. Grep "roundingFix" for details.
+ unpackTime(&absTime, isAbsolute, time);
+ }
+
+ // Enter safepoint region
+ // Beware of deadlocks such as 6317397.
+ // The per-thread Parker:: _mutex is a classic leaf-lock.
+ // In particular a thread must never block on the Threads_lock while
+ // holding the Parker:: mutex. If safepoints are pending both the
+ // the ThreadBlockInVM() CTOR and DTOR may grab Threads_lock.
+ ThreadBlockInVM tbivm(jt);
+
+ // Don't wait if cannot get lock since interference arises from
+ // unblocking. Also. check interrupt before trying wait
+ if (Thread::is_interrupted(thread, false) ||
+ os::Solaris::mutex_trylock(_mutex) != 0) {
+ return;
+ }
+
+ int status ;
+
+ if (_counter > 0) { // no wait needed
+ _counter = 0;
+ status = os::Solaris::mutex_unlock(_mutex);
+ assert (status == 0, "invariant") ;
+ return;
+ }
+
+#ifdef ASSERT
+ // Don't catch signals while blocked; let the running threads have the signals.
+ // (This allows a debugger to break into the running thread.)
+ sigset_t oldsigs;
+ sigset_t* allowdebug_blocked = os::Solaris::allowdebug_blocked_signals();
+ thr_sigsetmask(SIG_BLOCK, allowdebug_blocked, &oldsigs);
+#endif
+
+ OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */);
+ jt->set_suspend_equivalent();
+ // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self()
+
+ // Do this the hard way by blocking ...
+ // See http://monaco.sfbay/detail.jsf?cr=5094058.
+ // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking.
+ // Only for SPARC >= V8PlusA
+#if defined(__sparc) && defined(COMPILER2)
+ if (ClearFPUAtPark) { _mark_fpu_nosave() ; }
+#endif
+
+ if (time == 0) {
+ status = os::Solaris::cond_wait (_cond, _mutex) ;
+ } else {
+ status = os::Solaris::cond_timedwait (_cond, _mutex, &absTime);
+ }
+ // Note that an untimed cond_wait() can sometimes return ETIME on older
+ // versions of the Solaris.
+ assert_status(status == 0 || status == EINTR ||
+ status == ETIME || status == ETIMEDOUT,
+ status, "cond_timedwait");
+
+#ifdef ASSERT
+ thr_sigsetmask(SIG_SETMASK, &oldsigs, NULL);
+#endif
+ _counter = 0 ;
+ status = os::Solaris::mutex_unlock(_mutex);
+ assert_status(status == 0, status, "mutex_unlock") ;
+
+ // If externally suspended while waiting, re-suspend
+ if (jt->handle_special_suspend_equivalent_condition()) {
+ jt->java_suspend_self();
+ }
+
+}
+
+void Parker::unpark() {
+ int s, status ;
+ status = os::Solaris::mutex_lock (_mutex) ;
+ assert (status == 0, "invariant") ;
+ s = _counter;
+ _counter = 1;
+ status = os::Solaris::mutex_unlock (_mutex) ;
+ assert (status == 0, "invariant") ;
+
+ if (s < 1) {
+ status = os::Solaris::cond_signal (_cond) ;
+ assert (status == 0, "invariant") ;
+ }
+}
+
+extern char** environ;
+
+// Run the specified command in a separate process. Return its exit value,
+// or -1 on failure (e.g. can't fork a new process).
+// Unlike system(), this function can be called from signal handler. It
+// doesn't block SIGINT et al.
+int os::fork_and_exec(char* cmd) {
+ char * argv[4];
+ argv[0] = (char *)"sh";
+ argv[1] = (char *)"-c";
+ argv[2] = cmd;
+ argv[3] = NULL;
+
+ // fork is async-safe, fork1 is not so can't use in signal handler
+ pid_t pid;
+ Thread* t = ThreadLocalStorage::get_thread_slow();
+ if (t != NULL && t->is_inside_signal_handler()) {
+ pid = fork();
+ } else {
+ pid = fork1();
+ }
+
+ if (pid < 0) {
+ // fork failed
+ warning("fork failed: %s", strerror(errno));
+ return -1;
+
+ } else if (pid == 0) {
+ // child process
+
+ // try to be consistent with system(), which uses "/usr/bin/sh" on Solaris
+ execve("/usr/bin/sh", argv, environ);
+
+ // execve failed
+ _exit(-1);
+
+ } else {
+ // copied from J2SE ..._waitForProcessExit() in UNIXProcess_md.c; we don't
+ // care about the actual exit code, for now.
+
+ int status;
+
+ // Wait for the child process to exit. This returns immediately if
+ // the child has already exited. */
+ while (waitpid(pid, &status, 0) < 0) {
+ switch (errno) {
+ case ECHILD: return 0;
+ case EINTR: break;
+ default: return -1;
+ }
+ }
+
+ if (WIFEXITED(status)) {
+ // The child exited normally; get its exit code.
+ return WEXITSTATUS(status);
+ } else if (WIFSIGNALED(status)) {
+ // The child exited because of a signal
+ // The best value to return is 0x80 + signal number,
+ // because that is what all Unix shells do, and because
+ // it allows callers to distinguish between process exit and
+ // process death by signal.
+ return 0x80 + WTERMSIG(status);
+ } else {
+ // Unknown exit code; pass it through
+ return status;
+ }
+ }
+}