8231610: Relocate the CDS archive if it cannot be mapped to the requested address
Reviewed-by: jiangli, coleenp, ccheung
/*
* Copyright (c) 2002, 2019, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
#include "salibproc.h"
#include "sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal.h"
#include <thread_db.h>
#include <strings.h>
#include <limits.h>
#include <demangle.h>
#include <stdarg.h>
#include <stdlib.h>
#include <errno.h>
#include "cds.h"
#define CHECK_EXCEPTION_(value) if(env->ExceptionOccurred()) { return value; }
#define CHECK_EXCEPTION if(env->ExceptionOccurred()) { return;}
#define THROW_NEW_DEBUGGER_EXCEPTION_(str, value) { throwNewDebuggerException(env, str); return value; }
#define THROW_NEW_DEBUGGER_EXCEPTION(str) { throwNewDebuggerException(env, str); return;}
#define SYMBOL_BUF_SIZE 256
#define ERR_MSG_SIZE (PATH_MAX + 256)
// debug modes
static int _libsaproc_debug = 0;
static void print_debug(const char* format,...) {
if (_libsaproc_debug) {
va_list alist;
va_start(alist, format);
fputs("libsaproc DEBUG: ", stderr);
vfprintf(stderr, format, alist);
va_end(alist);
}
}
struct Debugger {
JNIEnv* env;
jobject this_obj;
};
struct DebuggerWithObject : Debugger {
jobject obj;
};
struct DebuggerWith2Objects : DebuggerWithObject {
jobject obj2;
};
/*
* Portions of user thread level detail gathering code is from pstack source
* code. See pstack.c in Solaris 2.8 user commands source code.
*/
static void throwNewDebuggerException(JNIEnv* env, const char* errMsg) {
jclass clazz = env->FindClass("sun/jvm/hotspot/debugger/DebuggerException");
CHECK_EXCEPTION;
env->ThrowNew(clazz, errMsg);
}
// JNI ids for some fields, methods
// libproc handler pointer
static jfieldID p_ps_prochandle_ID = 0;
// libthread.so dlopen handle, thread agent ptr and function pointers
static jfieldID libthread_db_handle_ID = 0;
static jfieldID p_td_thragent_t_ID = 0;
static jfieldID p_td_init_ID = 0;
static jfieldID p_td_ta_new_ID = 0;
static jfieldID p_td_ta_delete_ID = 0;
static jfieldID p_td_ta_thr_iter_ID = 0;
static jfieldID p_td_thr_get_info_ID = 0;
static jfieldID p_td_ta_map_id2thr_ID = 0;
static jfieldID p_td_thr_getgregs_ID = 0;
// reg index fields
static jfieldID pcRegIndex_ID = 0;
static jfieldID fpRegIndex_ID = 0;
// part of the class sharing workaround
static jfieldID classes_jsa_fd_ID = 0;
static jfieldID p_file_map_header_ID = 0;
// method ids
static jmethodID getThreadForThreadId_ID = 0;
static jmethodID createSenderFrame_ID = 0;
static jmethodID createLoadObject_ID = 0;
static jmethodID createClosestSymbol_ID = 0;
static jmethodID listAdd_ID = 0;
/*
* Functions we need from libthread_db
*/
typedef td_err_e
(*p_td_init_t)(void);
typedef td_err_e
(*p_td_ta_new_t)(void *, td_thragent_t **);
typedef td_err_e
(*p_td_ta_delete_t)(td_thragent_t *);
typedef td_err_e
(*p_td_ta_thr_iter_t)(const td_thragent_t *, td_thr_iter_f *, void *,
td_thr_state_e, int, sigset_t *, unsigned);
typedef td_err_e
(*p_td_thr_get_info_t)(const td_thrhandle_t *, td_thrinfo_t *);
typedef td_err_e
(*p_td_ta_map_id2thr_t)(const td_thragent_t *, thread_t, td_thrhandle_t *);
typedef td_err_e
(*p_td_thr_getgregs_t)(const td_thrhandle_t *, prgregset_t);
static void
clear_libthread_db_ptrs(JNIEnv* env, jobject this_obj) {
// release libthread_db agent, if we had created
p_td_ta_delete_t p_td_ta_delete = 0;
p_td_ta_delete = (p_td_ta_delete_t) env->GetLongField(this_obj, p_td_ta_delete_ID);
td_thragent_t *p_td_thragent_t = 0;
p_td_thragent_t = (td_thragent_t*) env->GetLongField(this_obj, p_td_thragent_t_ID);
if (p_td_thragent_t != 0 && p_td_ta_delete != 0) {
p_td_ta_delete(p_td_thragent_t);
}
// dlclose libthread_db.so
void* libthread_db_handle = (void*) env->GetLongField(this_obj, libthread_db_handle_ID);
if (libthread_db_handle != 0) {
dlclose(libthread_db_handle);
}
env->SetLongField(this_obj, libthread_db_handle_ID, (jlong)0);
env->SetLongField(this_obj, p_td_init_ID, (jlong)0);
env->SetLongField(this_obj, p_td_ta_new_ID, (jlong)0);
env->SetLongField(this_obj, p_td_ta_delete_ID, (jlong)0);
env->SetLongField(this_obj, p_td_ta_thr_iter_ID, (jlong)0);
env->SetLongField(this_obj, p_td_thr_get_info_ID, (jlong)0);
env->SetLongField(this_obj, p_td_ta_map_id2thr_ID, (jlong)0);
env->SetLongField(this_obj, p_td_thr_getgregs_ID, (jlong)0);
}
static void detach_internal(JNIEnv* env, jobject this_obj) {
// clear libthread_db stuff
clear_libthread_db_ptrs(env, this_obj);
// release ptr to ps_prochandle
jlong p_ps_prochandle;
p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
if (p_ps_prochandle != 0L) {
Prelease((struct ps_prochandle*) p_ps_prochandle, PRELEASE_CLEAR);
}
// part of the class sharing workaround
int classes_jsa_fd = env->GetIntField(this_obj, classes_jsa_fd_ID);
if (classes_jsa_fd != -1) {
close(classes_jsa_fd);
CDSFileMapHeaderBase* pheader = (CDSFileMapHeaderBase*) env->GetLongField(this_obj, p_file_map_header_ID);
if (pheader != NULL) {
free(pheader);
}
}
}
// Is it okay to ignore libthread_db failure? Set env var to ignore
// libthread_db failure. You can still debug, but will miss threads
// related functionality.
static bool sa_ignore_threaddb = (getenv("SA_IGNORE_THREADDB") != 0);
#define HANDLE_THREADDB_FAILURE(msg) \
if (sa_ignore_threaddb) { \
printf("libsaproc WARNING: %s\n", msg); \
return; \
} else { \
THROW_NEW_DEBUGGER_EXCEPTION(msg); \
}
#define HANDLE_THREADDB_FAILURE_(msg, ret) \
if (sa_ignore_threaddb) { \
printf("libsaproc WARNING: %s\n", msg); \
return ret; \
} else { \
THROW_NEW_DEBUGGER_EXCEPTION_(msg, ret); \
}
static const char * alt_root = NULL;
static int alt_root_len = -1;
#define SA_ALTROOT "SA_ALTROOT"
static void init_alt_root() {
if (alt_root_len == -1) {
alt_root = getenv(SA_ALTROOT);
if (alt_root)
alt_root_len = strlen(alt_root);
else
alt_root_len = 0;
}
}
// This function is a complete substitute for the open system call
// since it's also used to override open calls from libproc to
// implement as a pathmap style facility for the SA. If libproc
// starts using other interfaces then this might have to extended to
// cover other calls.
extern "C" JNIEXPORT int JNICALL
libsaproc_open(const char * name, int oflag, ...) {
if (oflag == O_RDONLY) {
init_alt_root();
if (_libsaproc_debug) {
printf("libsaproc DEBUG: libsaproc_open %s\n", name);
}
if (alt_root_len > 0) {
int fd = -1;
char alt_path[PATH_MAX+1];
strcpy(alt_path, alt_root);
strcat(alt_path, name);
fd = open(alt_path, O_RDONLY);
if (fd >= 0) {
if (_libsaproc_debug) {
printf("libsaproc DEBUG: libsaproc_open substituted %s\n", alt_path);
}
return fd;
}
if (strrchr(name, '/')) {
strcpy(alt_path, alt_root);
strcat(alt_path, strrchr(name, '/'));
fd = open(alt_path, O_RDONLY);
if (fd >= 0) {
if (_libsaproc_debug) {
printf("libsaproc DEBUG: libsaproc_open substituted %s\n", alt_path);
}
return fd;
}
}
}
}
{
mode_t mode;
va_list ap;
va_start(ap, oflag);
mode = va_arg(ap, mode_t);
va_end(ap);
return open(name, oflag, mode);
}
}
static void * pathmap_dlopen(const char * name, int mode) {
init_alt_root();
if (_libsaproc_debug) {
printf("libsaproc DEBUG: pathmap_dlopen %s\n", name);
}
void * handle = NULL;
if (alt_root_len > 0) {
char alt_path[PATH_MAX+1];
strcpy(alt_path, alt_root);
strcat(alt_path, name);
handle = dlopen(alt_path, mode);
if (_libsaproc_debug && handle) {
printf("libsaproc DEBUG: pathmap_dlopen substituted %s\n", alt_path);
}
if (handle == NULL && strrchr(name, '/')) {
strcpy(alt_path, alt_root);
strcat(alt_path, strrchr(name, '/'));
handle = dlopen(alt_path, mode);
if (_libsaproc_debug && handle) {
printf("libsaproc DEBUG: pathmap_dlopen substituted %s\n", alt_path);
}
}
}
if (handle == NULL) {
handle = dlopen(name, mode);
}
if (_libsaproc_debug) {
printf("libsaproc DEBUG: pathmap_dlopen %s return 0x%lx\n", name, (unsigned long) handle);
}
return handle;
}
// libproc and libthread_db callback functions
extern "C" {
static int
init_libthread_db_ptrs(void *cd, const prmap_t *pmp, const char *object_name) {
Debugger* dbg = (Debugger*) cd;
JNIEnv* env = dbg->env;
jobject this_obj = dbg->this_obj;
struct ps_prochandle* ph = (struct ps_prochandle*) env->GetLongField(this_obj, p_ps_prochandle_ID);
char *s1 = 0, *s2 = 0;
char libthread_db[PATH_MAX];
if (strstr(object_name, "/libthread.so.") == NULL)
return (0);
/*
* We found a libthread.
* dlopen() the matching libthread_db and get the thread agent handle.
*/
if (Pstatus(ph)->pr_dmodel == PR_MODEL_NATIVE) {
(void) strcpy(libthread_db, object_name);
s1 = (char*) strstr(object_name, ".so.");
s2 = (char*) strstr(libthread_db, ".so.");
(void) strcpy(s2, "_db");
s2 += 3;
(void) strcpy(s2, s1);
} else {
#ifdef _LP64
/*
* The victim process is 32-bit, we are 64-bit.
* We have to find the 64-bit version of libthread_db
* that matches the victim's 32-bit version of libthread.
*/
(void) strcpy(libthread_db, object_name);
s1 = (char*) strstr(object_name, "/libthread.so.");
s2 = (char*) strstr(libthread_db, "/libthread.so.");
(void) strcpy(s2, "/64");
s2 += 3;
(void) strcpy(s2, s1);
s1 = (char*) strstr(s1, ".so.");
s2 = (char*) strstr(s2, ".so.");
(void) strcpy(s2, "_db");
s2 += 3;
(void) strcpy(s2, s1);
#else
return (0);
#endif /* _LP64 */
}
void* libthread_db_handle = 0;
if ((libthread_db_handle = pathmap_dlopen(libthread_db, RTLD_LAZY|RTLD_LOCAL)) == NULL) {
char errMsg[PATH_MAX + 256];
sprintf(errMsg, "Can't load %s!", libthread_db);
HANDLE_THREADDB_FAILURE_(errMsg, 0);
}
env->SetLongField(this_obj, libthread_db_handle_ID, (jlong)(uintptr_t)libthread_db_handle);
void* tmpPtr = 0;
tmpPtr = dlsym(libthread_db_handle, "td_init");
if (tmpPtr == 0) {
HANDLE_THREADDB_FAILURE_("dlsym failed on td_init!", 0);
}
env->SetLongField(this_obj, p_td_init_ID, (jlong)(uintptr_t) tmpPtr);
tmpPtr =dlsym(libthread_db_handle, "td_ta_new");
if (tmpPtr == 0) {
HANDLE_THREADDB_FAILURE_("dlsym failed on td_ta_new!", 0);
}
env->SetLongField(this_obj, p_td_ta_new_ID, (jlong)(uintptr_t) tmpPtr);
tmpPtr = dlsym(libthread_db_handle, "td_ta_delete");
if (tmpPtr == 0) {
HANDLE_THREADDB_FAILURE_("dlsym failed on td_ta_delete!", 0);
}
env->SetLongField(this_obj, p_td_ta_delete_ID, (jlong)(uintptr_t) tmpPtr);
tmpPtr = dlsym(libthread_db_handle, "td_ta_thr_iter");
if (tmpPtr == 0) {
HANDLE_THREADDB_FAILURE_("dlsym failed on td_ta_thr_iter!", 0);
}
env->SetLongField(this_obj, p_td_ta_thr_iter_ID, (jlong)(uintptr_t) tmpPtr);
tmpPtr = dlsym(libthread_db_handle, "td_thr_get_info");
if (tmpPtr == 0) {
HANDLE_THREADDB_FAILURE_("dlsym failed on td_thr_get_info!", 0);
}
env->SetLongField(this_obj, p_td_thr_get_info_ID, (jlong)(uintptr_t) tmpPtr);
tmpPtr = dlsym(libthread_db_handle, "td_ta_map_id2thr");
if (tmpPtr == 0) {
HANDLE_THREADDB_FAILURE_("dlsym failed on td_ta_map_id2thr!", 0);
}
env->SetLongField(this_obj, p_td_ta_map_id2thr_ID, (jlong)(uintptr_t) tmpPtr);
tmpPtr = dlsym(libthread_db_handle, "td_thr_getgregs");
if (tmpPtr == 0) {
HANDLE_THREADDB_FAILURE_("dlsym failed on td_thr_getgregs!", 0);
}
env->SetLongField(this_obj, p_td_thr_getgregs_ID, (jlong)(uintptr_t) tmpPtr);
return 1;
}
static int
fill_thread_list(const td_thrhandle_t *p_td_thragent_t, void* cd) {
DebuggerWithObject* dbgo = (DebuggerWithObject*) cd;
JNIEnv* env = dbgo->env;
jobject this_obj = dbgo->this_obj;
jobject list = dbgo->obj;
td_thrinfo_t thrinfo;
p_td_thr_get_info_t p_td_thr_get_info = (p_td_thr_get_info_t) env->GetLongField(this_obj, p_td_thr_get_info_ID);
if (p_td_thr_get_info(p_td_thragent_t, &thrinfo) != TD_OK)
return (0);
jobject threadProxy = env->CallObjectMethod(this_obj, getThreadForThreadId_ID, (jlong)(uintptr_t) thrinfo.ti_tid);
CHECK_EXCEPTION_(1);
env->CallBooleanMethod(list, listAdd_ID, threadProxy);
CHECK_EXCEPTION_(1);
return 0;
}
static int
fill_load_object_list(void *cd, const prmap_t* pmp, const char* obj_name) {
if (obj_name) {
DebuggerWithObject* dbgo = (DebuggerWithObject*) cd;
JNIEnv* env = dbgo->env;
jobject this_obj = dbgo->this_obj;
jobject list = dbgo->obj;
jstring objectName = env->NewStringUTF(obj_name);
CHECK_EXCEPTION_(1);
jlong mapSize = (jlong) pmp->pr_size;
jobject sharedObject = env->CallObjectMethod(this_obj, createLoadObject_ID,
objectName, mapSize, (jlong)(uintptr_t)pmp->pr_vaddr);
CHECK_EXCEPTION_(1);
env->CallBooleanMethod(list, listAdd_ID, sharedObject);
CHECK_EXCEPTION_(1);
}
return 0;
}
// Pstack_iter() proc_stack_f callback prior to Nevada-B159
static int
fill_cframe_list(void *cd, const prgregset_t regs, uint_t argc, const long *argv) {
DebuggerWith2Objects* dbgo2 = (DebuggerWith2Objects*) cd;
JNIEnv* env = dbgo2->env;
jobject this_obj = dbgo2->this_obj;
jobject curFrame = dbgo2->obj2;
jint pcRegIndex = env->GetIntField(this_obj, pcRegIndex_ID);
jint fpRegIndex = env->GetIntField(this_obj, fpRegIndex_ID);
jlong pc = (jlong) (uintptr_t) regs[pcRegIndex];
jlong fp = (jlong) (uintptr_t) regs[fpRegIndex];
dbgo2->obj2 = env->CallObjectMethod(this_obj, createSenderFrame_ID,
curFrame, pc, fp);
CHECK_EXCEPTION_(1);
if (dbgo2->obj == 0) {
dbgo2->obj = dbgo2->obj2;
}
return 0;
}
// Pstack_iter() proc_stack_f callback in Nevada-B159 or later
/*ARGSUSED*/
static int
wrapper_fill_cframe_list(void *cd, const prgregset_t regs, uint_t argc,
const long *argv, int frame_flags, int sig) {
return(fill_cframe_list(cd, regs, argc, argv));
}
//---------------------------------------------------------------
// Part of the class sharing workaround:
//
// With class sharing, pages are mapped from classes.jsa file.
// The read-only class sharing pages are mapped as MAP_SHARED,
// PROT_READ pages. These pages are not dumped into core dump.
// With this workaround, these pages are read from classes.jsa.
static bool
read_jboolean(struct ps_prochandle* ph, psaddr_t addr, jboolean* pvalue) {
jboolean i;
if (ps_pread(ph, addr, &i, sizeof(i)) == PS_OK) {
*pvalue = i;
return true;
} else {
return false;
}
}
static bool
read_pointer(struct ps_prochandle* ph, psaddr_t addr, uintptr_t* pvalue) {
uintptr_t uip;
if (ps_pread(ph, addr, &uip, sizeof(uip)) == PS_OK) {
*pvalue = uip;
return true;
} else {
return false;
}
}
static bool
read_string(struct ps_prochandle* ph, psaddr_t addr, char* buf, size_t size) {
char ch = ' ';
size_t i = 0;
while (ch != '\0') {
if (ps_pread(ph, addr, &ch, sizeof(ch)) != PS_OK)
return false;
if (i < size - 1) {
buf[i] = ch;
} else { // smaller buffer
return false;
}
i++; addr++;
}
buf[i] = '\0';
return true;
}
#define USE_SHARED_SPACES_SYM "UseSharedSpaces"
#define SHARED_BASE_ADDRESS_SYM "SharedBaseAddress"
// mangled symbol name for Arguments::SharedArchivePath
#define SHARED_ARCHIVE_PATH_SYM "__1cJArgumentsRSharedArchivePath_"
static uintptr_t sharedBaseAddress = 0;
static int
init_classsharing_workaround(void *cd, const prmap_t* pmap, const char* obj_name) {
Debugger* dbg = (Debugger*) cd;
JNIEnv* env = dbg->env;
jobject this_obj = dbg->this_obj;
const char* jvm_name = 0;
if ((jvm_name = strstr(obj_name, "libjvm.so")) != NULL) {
jvm_name = obj_name;
} else {
return 0;
}
struct ps_prochandle* ph = (struct ps_prochandle*) env->GetLongField(this_obj, p_ps_prochandle_ID);
// initialize classes.jsa file descriptor field.
dbg->env->SetIntField(this_obj, classes_jsa_fd_ID, -1);
// check whether class sharing is on by reading variable "UseSharedSpaces"
psaddr_t useSharedSpacesAddr = 0;
ps_pglobal_lookup(ph, jvm_name, USE_SHARED_SPACES_SYM, &useSharedSpacesAddr);
if (useSharedSpacesAddr == 0) {
THROW_NEW_DEBUGGER_EXCEPTION_("can't find 'UseSharedSpaces' flag\n", 1);
}
// read the value of the flag "UseSharedSpaces"
// Since hotspot types are not available to build this library. So
// equivalent type "jboolean" is used to read the value of "UseSharedSpaces"
// which is same as hotspot type "bool".
jboolean value = 0;
if (read_jboolean(ph, useSharedSpacesAddr, &value) != true) {
THROW_NEW_DEBUGGER_EXCEPTION_("can't read 'UseSharedSpaces' flag", 1);
} else if ((int)value == 0) {
print_debug("UseSharedSpaces is false, assuming -Xshare:off!\n");
return 1;
}
psaddr_t sharedBaseAddressAddr = 0;
ps_pglobal_lookup(ph, jvm_name, SHARED_ARCHIVE_PATH_SYM, &sharedBaseAddressAddr);
if (sharedBaseAddressAddr == 0) {
print_debug("can't find symbol 'SharedBaseAddress'\n");
THROW_NEW_DEBUGGER_EXCEPTION_("can't find 'SharedBaseAddress' flag\n", 1);
}
sharedBaseAddress = 0;
if (read_pointer(ph, sharedBaseAddressAddr, &sharedBaseAddress) != true) {
print_debug("can't read the value of 'SharedBaseAddress' flag\n");
THROW_NEW_DEBUGGER_EXCEPTION_("can't get SharedBaseAddress from debuggee", 1);
}
char classes_jsa[PATH_MAX];
psaddr_t sharedArchivePathAddrAddr = 0;
ps_pglobal_lookup(ph, jvm_name, SHARED_ARCHIVE_PATH_SYM, &sharedArchivePathAddrAddr);
if (sharedArchivePathAddrAddr == 0) {
print_debug("can't find symbol 'Arguments::SharedArchivePath'\n");
THROW_NEW_DEBUGGER_EXCEPTION_("can't get shared archive path from debuggee", 1);
}
uintptr_t sharedArchivePathAddr = 0;
if (read_pointer(ph, sharedArchivePathAddrAddr, &sharedArchivePathAddr) != true) {
print_debug("can't find read pointer 'Arguments::SharedArchivePath'\n");
THROW_NEW_DEBUGGER_EXCEPTION_("can't get shared archive path from debuggee", 1);
}
if (read_string(ph, (psaddr_t)sharedArchivePathAddr, classes_jsa, sizeof(classes_jsa)) != true) {
print_debug("can't find read 'Arguments::SharedArchivePath' value\n");
THROW_NEW_DEBUGGER_EXCEPTION_("can't get shared archive path from debuggee", 1);
}
print_debug("looking for %s\n", classes_jsa);
// open the classes.jsa
int fd = libsaproc_open(classes_jsa, O_RDONLY);
if (fd < 0) {
char errMsg[ERR_MSG_SIZE];
sprintf(errMsg, "can't open shared archive file %s", classes_jsa);
THROW_NEW_DEBUGGER_EXCEPTION_(errMsg, 1);
} else {
print_debug("opened shared archive file %s\n", classes_jsa);
}
// parse classes.jsa
CDSFileMapHeaderBase* pheader = (CDSFileMapHeaderBase*) malloc(sizeof(CDSFileMapHeaderBase));
if (pheader == NULL) {
close(fd);
THROW_NEW_DEBUGGER_EXCEPTION_("can't allocate memory for shared file map header", 1);
}
memset(pheader, 0, sizeof(CDSFileMapHeaderBase));
// read CDSFileMapHeaderBase
size_t n = read(fd, pheader, sizeof(CDSFileMapHeaderBase));
if (n != sizeof(CDSFileMapHeaderBase)) {
char errMsg[ERR_MSG_SIZE];
sprintf(errMsg, "unable to read shared archive file map header from %s", classes_jsa);
close(fd);
free(pheader);
THROW_NEW_DEBUGGER_EXCEPTION_(errMsg, 1);
}
// check file magic
if (pheader->_magic != CDS_ARCHIVE_MAGIC) {
char errMsg[ERR_MSG_SIZE];
sprintf(errMsg, "%s has bad shared archive magic 0x%x, expecting 0x%x",
classes_jsa, pheader->_magic, CDS_ARCHIVE_MAGIC);
close(fd);
free(pheader);
THROW_NEW_DEBUGGER_EXCEPTION_(errMsg, 1);
}
// check version
if (pheader->_version != CURRENT_CDS_ARCHIVE_VERSION) {
char errMsg[ERR_MSG_SIZE];
sprintf(errMsg, "%s has wrong shared archive version %d, expecting %d",
classes_jsa, pheader->_version, CURRENT_CDS_ARCHIVE_VERSION);
close(fd);
free(pheader);
THROW_NEW_DEBUGGER_EXCEPTION_(errMsg, 1);
}
if (_libsaproc_debug) {
for (int m = 0; m < NUM_CDS_REGIONS; m++) {
if (!pheader->_space[m]._is_heap_region &&
!pheader->_space[m]._is_bitmap_region) {
jlong mapping_offset = pheader->_space[m]._mapping_offset;
jlong baseAddress = mapping_offset + (jlong)sharedBaseAddress;
print_debug("shared file offset %d mapped at 0x%lx, size = %ld, read only? = %d\n",
pheader->_space[m]._file_offset, baseAddress,
pheader->_space[m]._used, pheader->_space[m]._read_only);
}
}
}
// FIXME: For now, omitting other checks such as VM version etc.
// store class archive file fd and map header in debugger object fields
dbg->env->SetIntField(this_obj, classes_jsa_fd_ID, fd);
dbg->env->SetLongField(this_obj, p_file_map_header_ID, (jlong)(uintptr_t) pheader);
return 1;
}
} // extern "C"
// error messages for proc_arg_grab failure codes. The messages are
// modified versions of comments against corresponding #defines in
// libproc.h.
static const char* proc_arg_grab_errmsgs[] = {
"",
/* G_NOPROC */ "No such process",
/* G_NOCORE */ "No such core file",
/* G_NOPROCORCORE */ "No such process or core",
/* G_NOEXEC */ "Cannot locate executable file",
/* G_ZOMB */ "Zombie processs",
/* G_PERM */ "No permission to attach",
/* G_BUSY */ "Another process has already attached",
/* G_SYS */ "System process - can not attach",
/* G_SELF */ "Process is self - can't debug myself!",
/* G_INTR */ "Interrupt received while grabbing",
/* G_LP64 */ "debuggee is 64 bit, use java -d64 for debugger",
/* G_FORMAT */ "File is not an ELF format core file - corrupted core?",
/* G_ELF */ "Libelf error while parsing an ELF file",
/* G_NOTE */ "Required PT_NOTE Phdr not present - corrupted core?",
};
static void attach_internal(JNIEnv* env, jobject this_obj, jstring cmdLine, jboolean isProcess) {
jboolean isCopy;
int gcode;
const char* cmdLine_cstr = env->GetStringUTFChars(cmdLine, &isCopy);
char errMsg[ERR_MSG_SIZE];
td_err_e te;
CHECK_EXCEPTION;
if (cmdLine_cstr == NULL) {
return;
}
// some older versions of libproc.so crash when trying to attach 32 bit
// debugger to 64 bit core file. check and throw error.
#ifndef _LP64
errno = 0;
strtol(cmdLine_cstr, NULL, 10);
if (errno) {
// core file
int core_fd;
if ((core_fd = open64(cmdLine_cstr, O_RDONLY)) >= 0) {
Elf32_Ehdr e32;
if (pread64(core_fd, &e32, sizeof (e32), 0) == sizeof (e32) &&
memcmp(&e32.e_ident[EI_MAG0], ELFMAG, SELFMAG) == 0 &&
e32.e_type == ET_CORE && e32.e_ident[EI_CLASS] == ELFCLASS64) {
close(core_fd);
env->ReleaseStringUTFChars(cmdLine, cmdLine_cstr);
THROW_NEW_DEBUGGER_EXCEPTION("debuggee is 64 bit, use java -d64 for debugger");
}
close(core_fd);
}
// all other conditions are handled by libproc.so.
}
#endif
// connect to process/core
ps_prochandle_t* ph = proc_arg_grab(cmdLine_cstr, (isProcess? PR_ARG_PIDS : PR_ARG_CORES), PGRAB_FORCE, &gcode, NULL);
env->ReleaseStringUTFChars(cmdLine, cmdLine_cstr);
if (! ph) {
if (gcode > 0 && gcode < sizeof(proc_arg_grab_errmsgs)/sizeof(const char*)) {
snprintf(errMsg, ERR_MSG_SIZE, "Attach failed : %s", proc_arg_grab_errmsgs[gcode]);
THROW_NEW_DEBUGGER_EXCEPTION(errMsg);
} else {
if (_libsaproc_debug && gcode == G_STRANGE) {
perror("libsaproc DEBUG: ");
}
if (isProcess) {
THROW_NEW_DEBUGGER_EXCEPTION("Not able to attach to process!");
} else {
THROW_NEW_DEBUGGER_EXCEPTION("Not able to attach to core file!");
}
}
}
// even though libproc.so supports 64 bit debugger and 32 bit debuggee, we don't
// support such cross-bit-debugging. check for that combination and throw error.
#ifdef _LP64
int data_model;
if (ps_pdmodel(ph, &data_model) != PS_OK) {
Prelease(ph, PRELEASE_CLEAR);
THROW_NEW_DEBUGGER_EXCEPTION("can't determine debuggee data model (ILP32? or LP64?)");
}
if (data_model == PR_MODEL_ILP32) {
Prelease(ph, PRELEASE_CLEAR);
THROW_NEW_DEBUGGER_EXCEPTION("debuggee is 32 bit, use 32 bit java for debugger");
}
#endif
env->SetLongField(this_obj, p_ps_prochandle_ID, (jlong)(uintptr_t)ph);
Debugger dbg;
dbg.env = env;
dbg.this_obj = this_obj;
jthrowable exception = 0;
if (! isProcess) {
/*
* With class sharing, shared perm. gen heap is allocated in with MAP_SHARED|PROT_READ.
* These pages are mapped from the file "classes.jsa". MAP_SHARED pages are not dumped
* in Solaris core.To read shared heap pages, we have to read classes.jsa file.
*/
Pobject_iter(ph, init_classsharing_workaround, &dbg);
exception = env->ExceptionOccurred();
if (exception) {
env->ExceptionClear();
detach_internal(env, this_obj);
env->Throw(exception);
return;
}
}
/*
* Iterate over the process mappings looking
* for libthread and then dlopen the appropriate
* libthread_db and get function pointers.
*/
Pobject_iter(ph, init_libthread_db_ptrs, &dbg);
exception = env->ExceptionOccurred();
if (exception) {
env->ExceptionClear();
if (!sa_ignore_threaddb) {
detach_internal(env, this_obj);
env->Throw(exception);
}
return;
}
// init libthread_db and create thread_db agent
p_td_init_t p_td_init = (p_td_init_t) env->GetLongField(this_obj, p_td_init_ID);
if (p_td_init == 0) {
if (!sa_ignore_threaddb) {
detach_internal(env, this_obj);
}
HANDLE_THREADDB_FAILURE("Did not find libthread in target process/core!");
}
te = p_td_init();
if (te != TD_OK) {
if (!sa_ignore_threaddb) {
detach_internal(env, this_obj);
}
snprintf(errMsg, ERR_MSG_SIZE, "Can't initialize thread_db! td_init failed: %d", te);
HANDLE_THREADDB_FAILURE(errMsg);
}
p_td_ta_new_t p_td_ta_new = (p_td_ta_new_t) env->GetLongField(this_obj, p_td_ta_new_ID);
td_thragent_t *p_td_thragent_t = 0;
te = p_td_ta_new(ph, &p_td_thragent_t);
if (te != TD_OK) {
if (!sa_ignore_threaddb) {
detach_internal(env, this_obj);
}
snprintf(errMsg, ERR_MSG_SIZE, "Can't create thread_db agent! td_ta_new failed: %d", te);
HANDLE_THREADDB_FAILURE(errMsg);
}
env->SetLongField(this_obj, p_td_thragent_t_ID, (jlong)(uintptr_t) p_td_thragent_t);
}
/*
* Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
* Method: attach0
* Signature: (Ljava/lang/String;)V
* Description: process detach
*/
JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_attach0__Ljava_lang_String_2
(JNIEnv *env, jobject this_obj, jstring pid) {
attach_internal(env, this_obj, pid, JNI_TRUE);
}
/*
* Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
* Method: attach0
* Signature: (Ljava/lang/String;Ljava/lang/String;)V
* Description: core file detach
*/
JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_attach0__Ljava_lang_String_2Ljava_lang_String_2
(JNIEnv *env, jobject this_obj, jstring executable, jstring corefile) {
// ignore executable file name, libproc.so can detect a.out name anyway.
attach_internal(env, this_obj, corefile, JNI_FALSE);
}
/*
* Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
* Method: detach0
* Signature: ()V
* Description: process/core file detach
*/
JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_detach0
(JNIEnv *env, jobject this_obj) {
detach_internal(env, this_obj);
}
/*
* Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
* Method: getRemoteProcessAddressSize0
* Signature: ()I
* Description: get process/core address size
*/
JNIEXPORT jint JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_getRemoteProcessAddressSize0
(JNIEnv *env, jobject this_obj) {
jlong p_ps_prochandle;
p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
int data_model = PR_MODEL_ILP32;
ps_pdmodel((struct ps_prochandle*) p_ps_prochandle, &data_model);
print_debug("debuggee is %d bit\n", data_model == PR_MODEL_ILP32? 32 : 64);
return (jint) data_model == PR_MODEL_ILP32? 32 : 64;
}
/*
* Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
* Method: getPageSize0
* Signature: ()I
* Description: get process/core page size
*/
JNIEXPORT jint JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_getPageSize0
(JNIEnv *env, jobject this_obj) {
/*
We are not yet attached to a java process or core file. getPageSize is called from
the constructor of ProcDebuggerLocal. The following won't work!
jlong p_ps_prochandle;
p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
CHECK_EXCEPTION_(-1);
struct ps_prochandle* prochandle = (struct ps_prochandle*) p_ps_prochandle;
return (Pstate(prochandle) == PS_DEAD) ? Pgetauxval(prochandle, AT_PAGESZ)
: getpagesize();
So even though core may have been generated with a different page size settings, for now
call getpagesize.
*/
return getpagesize();
}
/*
* Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
* Method: getThreadIntegerRegisterSet0
* Signature: (J)[J
* Description: get gregset for a given thread specified by thread id
*/
JNIEXPORT jlongArray JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_getThreadIntegerRegisterSet0
(JNIEnv *env, jobject this_obj, jlong tid) {
char errMsg[ERR_MSG_SIZE];
td_err_e te;
// map the thread id to thread handle
p_td_ta_map_id2thr_t p_td_ta_map_id2thr = (p_td_ta_map_id2thr_t) env->GetLongField(this_obj, p_td_ta_map_id2thr_ID);
td_thragent_t* p_td_thragent_t = (td_thragent_t*) env->GetLongField(this_obj, p_td_thragent_t_ID);
if (p_td_thragent_t == 0) {
return 0;
}
td_thrhandle_t thr_handle;
te = p_td_ta_map_id2thr(p_td_thragent_t, (thread_t) tid, &thr_handle);
if (te != TD_OK) {
snprintf(errMsg, ERR_MSG_SIZE, "can't map thread id to thread handle! td_ta_map_id2thr failed: %d", te);
THROW_NEW_DEBUGGER_EXCEPTION_(errMsg, 0);
}
p_td_thr_getgregs_t p_td_thr_getgregs = (p_td_thr_getgregs_t) env->GetLongField(this_obj, p_td_thr_getgregs_ID);
prgregset_t gregs;
p_td_thr_getgregs(&thr_handle, gregs);
jlongArray res = env->NewLongArray(NPRGREG);
CHECK_EXCEPTION_(0);
jboolean isCopy;
jlong* ptr = env->GetLongArrayElements(res, &isCopy);
CHECK_EXCEPTION_(NULL);
for (int i = 0; i < NPRGREG; i++) {
ptr[i] = (jlong) (uintptr_t) gregs[i];
}
env->ReleaseLongArrayElements(res, ptr, JNI_COMMIT);
return res;
}
/*
* Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
* Method: fillThreadList0
* Signature: (Ljava/util/List;)V
* Description: fills thread list of the debuggee process/core
*/
JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_fillThreadList0
(JNIEnv *env, jobject this_obj, jobject list) {
td_thragent_t* p_td_thragent_t = (td_thragent_t*) env->GetLongField(this_obj, p_td_thragent_t_ID);
if (p_td_thragent_t == 0) {
return;
}
p_td_ta_thr_iter_t p_td_ta_thr_iter = (p_td_ta_thr_iter_t) env->GetLongField(this_obj, p_td_ta_thr_iter_ID);
DebuggerWithObject dbgo;
dbgo.env = env;
dbgo.this_obj = this_obj;
dbgo.obj = list;
p_td_ta_thr_iter(p_td_thragent_t, fill_thread_list, &dbgo,
TD_THR_ANY_STATE, TD_THR_LOWEST_PRIORITY, TD_SIGNO_MASK, TD_THR_ANY_USER_FLAGS);
}
/*
* Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
* Method: fillCFrameList0
* Signature: ([J)Lsun/jvm/hotspot/debugger/proc/ProcCFrame;
* Description: fills CFrame list for a given thread
*/
JNIEXPORT jobject JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_fillCFrameList0
(JNIEnv *env, jobject this_obj, jlongArray regsArray) {
jlong p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
DebuggerWith2Objects dbgo2;
dbgo2.env = env;
dbgo2.this_obj = this_obj;
dbgo2.obj = NULL;
dbgo2.obj2 = NULL;
jboolean isCopy;
jlong* ptr = env->GetLongArrayElements(regsArray, &isCopy);
CHECK_EXCEPTION_(0);
prgregset_t gregs;
for (int i = 0; i < NPRGREG; i++) {
gregs[i] = (uintptr_t) ptr[i];
}
env->ReleaseLongArrayElements(regsArray, ptr, JNI_ABORT);
CHECK_EXCEPTION_(0);
Pstack_iter((struct ps_prochandle*) p_ps_prochandle, gregs,
wrapper_fill_cframe_list, &dbgo2);
return dbgo2.obj;
}
/*
* Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
* Method: fillLoadObjectList0
* Signature: (Ljava/util/List;)V
* Description: fills shared objects of the debuggee process/core
*/
JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_fillLoadObjectList0
(JNIEnv *env, jobject this_obj, jobject list) {
DebuggerWithObject dbgo;
dbgo.env = env;
dbgo.this_obj = this_obj;
dbgo.obj = list;
jlong p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
Pobject_iter((struct ps_prochandle*) p_ps_prochandle, fill_load_object_list, &dbgo);
}
/*
* Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
* Method: readBytesFromProcess0
* Signature: (JJ)[B
* Description: read bytes from debuggee process/core
*/
JNIEXPORT jbyteArray JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_readBytesFromProcess0
(JNIEnv *env, jobject this_obj, jlong address, jlong numBytes) {
jbyteArray array = env->NewByteArray(numBytes);
CHECK_EXCEPTION_(0);
jboolean isCopy;
jbyte* bufPtr = env->GetByteArrayElements(array, &isCopy);
CHECK_EXCEPTION_(0);
jlong p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
ps_err_e ret = ps_pread((struct ps_prochandle*) p_ps_prochandle,
(psaddr_t)address, bufPtr, (size_t)numBytes);
if (ret != PS_OK) {
// part of the class sharing workaround. try shared heap area
int classes_jsa_fd = env->GetIntField(this_obj, classes_jsa_fd_ID);
if (classes_jsa_fd != -1 && address != (jlong)0) {
print_debug("read failed at 0x%lx, attempting shared heap area\n", (long) address);
CDSFileMapHeaderBase* pheader = (CDSFileMapHeaderBase*) env->GetLongField(this_obj, p_file_map_header_ID);
// walk through the shared mappings -- we just have 9 of them.
// so, linear walking is okay.
for (int m = 0; m < NUM_CDS_REGIONS; m++) {
// We can skip the non-read-only maps. These are mapped as MAP_PRIVATE
// and hence will be read by libproc. Besides, the file copy may be
// stale because the process might have modified those pages.
if (pheader->_space[m]._read_only &&
!pheader->_space[m]._is_heap_region &&
!pheader->_space[m]._is_bitmap_region) {
jlong mapping_offset = (jlong) (uintptr_t) pheader->_space[m]._mapping_offset;
jlong baseAddress = mapping_offset + (jlong)sharedBaseAddress;
size_t usedSize = pheader->_space[m]._used;
if (address >= baseAddress && address < (baseAddress + usedSize)) {
// the given address falls in this shared metadata area
print_debug("found shared map at 0x%lx\n", (long) baseAddress);
// If more data is asked than actually mapped from file, we need to zero fill
// till the end-of-page boundary. But, java array new does that for us. we just
// need to read as much as data available.
#define MIN2(x, y) (((x) < (y))? (x) : (y))
jlong diff = address - baseAddress;
jlong bytesToRead = MIN2(numBytes, usedSize - diff);
off_t offset = pheader->_space[m]._file_offset + off_t(diff);
ssize_t bytesRead = pread(classes_jsa_fd, bufPtr, bytesToRead, offset);
if (bytesRead != bytesToRead) {
env->ReleaseByteArrayElements(array, bufPtr, JNI_ABORT);
print_debug("shared map read failed\n");
return jbyteArray(0);
} else {
print_debug("shared map read succeeded\n");
env->ReleaseByteArrayElements(array, bufPtr, 0);
return array;
}
} // is in current map
} // is read only map
} // for shared maps
} // classes_jsa_fd != -1
env->ReleaseByteArrayElements(array, bufPtr, JNI_ABORT);
return jbyteArray(0);
} else {
env->ReleaseByteArrayElements(array, bufPtr, 0);
return array;
}
}
/*
* Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
* Method: writeBytesToProcess0
* Signature: (JJ[B)V
* Description: write bytes into debugger process
*/
JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_writeBytesToProcess0
(JNIEnv *env, jobject this_obj, jlong address, jlong numBytes, jbyteArray data) {
char errMsg[ERR_MSG_SIZE];
ps_err_e pe;
jlong p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
jboolean isCopy;
jbyte* ptr = env->GetByteArrayElements(data, &isCopy);
CHECK_EXCEPTION;
pe = ps_pwrite((struct ps_prochandle*) p_ps_prochandle, address, ptr, numBytes);
if (pe != PS_OK) {
snprintf(errMsg, ERR_MSG_SIZE, "Process write failed! ps_pwrite failed: %d", pe);
env->ReleaseByteArrayElements(data, ptr, JNI_ABORT);
THROW_NEW_DEBUGGER_EXCEPTION(errMsg);
}
env->ReleaseByteArrayElements(data, ptr, JNI_ABORT);
}
/*
* Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
* Method: suspend0
* Signature: ()V
*/
JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_suspend0
(JNIEnv *env, jobject this_obj) {
jlong p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
// for now don't check return value. revisit this again.
Pstop((struct ps_prochandle*) p_ps_prochandle, 1000);
}
/*
* Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
* Method: resume0
* Signature: ()V
*/
JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_resume0
(JNIEnv *env, jobject this_obj) {
jlong p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
// for now don't check return value. revisit this again.
Psetrun((struct ps_prochandle*) p_ps_prochandle, 0, PRCFAULT|PRSTOP);
}
/*
* Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
* Method: lookupByName0
* Signature: (Ljava/lang/String;Ljava/lang/String;)J
* Description: symbol lookup by name
*/
JNIEXPORT jlong JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_lookupByName0
(JNIEnv *env, jobject this_obj, jstring objectName, jstring symbolName) {
jlong p_ps_prochandle;
p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
jboolean isCopy;
const char* objectName_cstr = NULL;
if (objectName != NULL) {
objectName_cstr = env->GetStringUTFChars(objectName, &isCopy);
CHECK_EXCEPTION_(0);
} else {
objectName_cstr = PR_OBJ_EVERY;
}
const char* symbolName_cstr = env->GetStringUTFChars(symbolName, &isCopy);
CHECK_EXCEPTION_(0);
psaddr_t symbol_addr = (psaddr_t) 0;
ps_pglobal_lookup((struct ps_prochandle*) p_ps_prochandle, objectName_cstr,
symbolName_cstr, &symbol_addr);
if (symbol_addr == 0) {
print_debug("lookup for %s in %s failed\n", symbolName_cstr, objectName_cstr);
}
if (objectName_cstr != PR_OBJ_EVERY) {
env->ReleaseStringUTFChars(objectName, objectName_cstr);
}
env->ReleaseStringUTFChars(symbolName, symbolName_cstr);
return (jlong) (uintptr_t) symbol_addr;
}
/*
* Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
* Method: lookupByAddress0
* Signature: (J)Lsun/jvm/hotspot/debugger/cdbg/ClosestSymbol;
* Description: lookup symbol name for a given address
*/
JNIEXPORT jobject JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_lookupByAddress0
(JNIEnv *env, jobject this_obj, jlong address) {
jlong p_ps_prochandle;
p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
char nameBuf[SYMBOL_BUF_SIZE + 1];
GElf_Sym sym;
int res = Plookup_by_addr((struct ps_prochandle*) p_ps_prochandle, (uintptr_t) address,
nameBuf, sizeof(nameBuf), &sym, NULL);
if (res != 0) { // failed
return 0;
}
jstring resSym = env->NewStringUTF(nameBuf);
CHECK_EXCEPTION_(0);
return env->CallObjectMethod(this_obj, createClosestSymbol_ID, resSym, (address - sym.st_value));
}
/*
* Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
* Method: demangle0
* Signature: (Ljava/lang/String;)Ljava/lang/String;
*/
JNIEXPORT jstring JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_demangle0
(JNIEnv *env, jobject this_object, jstring name) {
jboolean isCopy;
const char* ptr = env->GetStringUTFChars(name, &isCopy);
CHECK_EXCEPTION_(NULL);
char buf[2*SYMBOL_BUF_SIZE + 1];
jstring res = 0;
if (cplus_demangle((char*) ptr, buf, sizeof(buf)) != DEMANGLE_ESPACE) {
res = env->NewStringUTF(buf);
} else {
res = name;
}
env->ReleaseStringUTFChars(name, ptr);
return res;
}
/*
* Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
* Method: initIDs
* Signature: ()V
* Description: get JNI ids for fields and methods of ProcDebuggerLocal class
*/
JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_initIDs
(JNIEnv *env, jclass clazz) {
_libsaproc_debug = getenv("LIBSAPROC_DEBUG") != NULL;
if (_libsaproc_debug) {
// propagate debug mode to libproc.so
static const char* var = "LIBPROC_DEBUG=1";
putenv((char*)var);
}
void* libproc_handle = dlopen("libproc.so", RTLD_LAZY | RTLD_GLOBAL);
if (libproc_handle == 0)
THROW_NEW_DEBUGGER_EXCEPTION("can't load libproc.so, if you are using Solaris 5.7 or below, copy libproc.so from 5.8!");
p_ps_prochandle_ID = env->GetFieldID(clazz, "p_ps_prochandle", "J");
CHECK_EXCEPTION;
libthread_db_handle_ID = env->GetFieldID(clazz, "libthread_db_handle", "J");
CHECK_EXCEPTION;
p_td_thragent_t_ID = env->GetFieldID(clazz, "p_td_thragent_t", "J");
CHECK_EXCEPTION;
p_td_init_ID = env->GetFieldID(clazz, "p_td_init", "J");
CHECK_EXCEPTION;
p_td_ta_new_ID = env->GetFieldID(clazz, "p_td_ta_new", "J");
CHECK_EXCEPTION;
p_td_ta_delete_ID = env->GetFieldID(clazz, "p_td_ta_delete", "J");
CHECK_EXCEPTION;
p_td_ta_thr_iter_ID = env->GetFieldID(clazz, "p_td_ta_thr_iter", "J");
CHECK_EXCEPTION;
p_td_thr_get_info_ID = env->GetFieldID(clazz, "p_td_thr_get_info", "J");
CHECK_EXCEPTION;
p_td_ta_map_id2thr_ID = env->GetFieldID(clazz, "p_td_ta_map_id2thr", "J");
CHECK_EXCEPTION;
p_td_thr_getgregs_ID = env->GetFieldID(clazz, "p_td_thr_getgregs", "J");
CHECK_EXCEPTION;
getThreadForThreadId_ID = env->GetMethodID(clazz,
"getThreadForThreadId", "(J)Lsun/jvm/hotspot/debugger/ThreadProxy;");
CHECK_EXCEPTION;
pcRegIndex_ID = env->GetFieldID(clazz, "pcRegIndex", "I");
CHECK_EXCEPTION;
fpRegIndex_ID = env->GetFieldID(clazz, "fpRegIndex", "I");
CHECK_EXCEPTION;
createSenderFrame_ID = env->GetMethodID(clazz,
"createSenderFrame", "(Lsun/jvm/hotspot/debugger/proc/ProcCFrame;JJ)Lsun/jvm/hotspot/debugger/proc/ProcCFrame;");
CHECK_EXCEPTION;
createLoadObject_ID = env->GetMethodID(clazz,
"createLoadObject", "(Ljava/lang/String;JJ)Lsun/jvm/hotspot/debugger/cdbg/LoadObject;");
CHECK_EXCEPTION;
createClosestSymbol_ID = env->GetMethodID(clazz,
"createClosestSymbol", "(Ljava/lang/String;J)Lsun/jvm/hotspot/debugger/cdbg/ClosestSymbol;");
CHECK_EXCEPTION;
jclass list_clazz = env->FindClass("java/util/List");
CHECK_EXCEPTION;
listAdd_ID = env->GetMethodID(list_clazz, "add", "(Ljava/lang/Object;)Z");
CHECK_EXCEPTION;
// part of the class sharing workaround
classes_jsa_fd_ID = env->GetFieldID(clazz, "classes_jsa_fd", "I");
CHECK_EXCEPTION;
p_file_map_header_ID = env->GetFieldID(clazz, "p_file_map_header", "J");
CHECK_EXCEPTION;
}