diff -r 000000000000 -r a61af66fc99e agent/src/os/solaris/proc/saproc.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/agent/src/os/solaris/proc/saproc.cpp Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,1300 @@ +/* + * Copyright 2002-2007 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. + * + */ + +#include "salibproc.h" +#include "sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal.h" +#include +#include +#include +#include +#include +#include +#include + +#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 mode +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) { + env->ThrowNew(env->FindClass("sun/jvm/hotspot/debugger/DebuggerException"), 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); + struct FileMapHeader* pheader = (struct FileMapHeader*) 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; + } +} + +static int find_file_hook(const char * name, int elf_checksum) { + init_alt_root(); + + if (_libsaproc_debug) { + printf("libsaproc DEBUG: find_file_hook %s 0x%x\n", name, elf_checksum); + } + + 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: find_file_hook 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: find_file_hook substituted %s\n", alt_path); + } + return fd; + } + } + } + return -1; +} + +static int pathmap_open(const char* name) { + int fd = open(name, O_RDONLY); + if (fd < 0) { + fd = find_file_hook(name, 0); + } + return fd; +} + +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%x\n", name, 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; +} + +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; +} + +// part of the class sharing workaround + +// FIXME: !!HACK ALERT!! + +// The format of sharing achive file header is needed to read shared heap +// file mappings. For now, I am hard coding portion of FileMapHeader here. +// Refer to filemap.hpp. + +// FileMapHeader describes the shared space data in the file to be +// mapped. This structure gets written to a file. It is not a class, so +// that the compilers don't add any compiler-private data to it. + +// Refer to CompactingPermGenGen::n_regions in compactingPermGenGen.hpp +const int NUM_SHARED_MAPS = 4; + +// Refer to FileMapInfo::_current_version in filemap.hpp +const int CURRENT_ARCHIVE_VERSION = 1; + +struct FileMapHeader { + int _magic; // identify file type. + int _version; // (from enum, above.) + size_t _alignment; // how shared archive should be aligned + + + struct space_info { + int _file_offset; // sizeof(this) rounded to vm page size + char* _base; // copy-on-write base address + size_t _capacity; // for validity checking + size_t _used; // for setting space top on read + + bool _read_only; // read only space? + bool _allow_exec; // executable code in space? + + } _space[NUM_SHARED_MAPS]; // was _space[CompactingPermGenGen::n_regions]; + + // Ignore the rest of the FileMapHeader. We don't need those fields here. +}; + +static bool +read_int(struct ps_prochandle* ph, psaddr_t addr, int* pvalue) { + int 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" +// mangled symbol name for Arguments::SharedArchivePath +#define SHARED_ARCHIVE_PATH_SYM "__1cJArgumentsRSharedArchivePath_" + +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 = strstr(obj_name, "libjvm_g.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[_g].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" + int value = 0; + if (read_int(ph, useSharedSpacesAddr, &value) != true) { + THROW_NEW_DEBUGGER_EXCEPTION_("can't read 'UseSharedSpaces' flag", 1); + } else if (value == 0) { + print_debug("UseSharedSpaces is false, assuming -Xshare:off!\n"); + return 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[_g].jsa + int fd = pathmap_open(classes_jsa); + 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[_g].jsa + struct FileMapHeader* pheader = (struct FileMapHeader*) malloc(sizeof(struct FileMapHeader)); + if (pheader == NULL) { + close(fd); + THROW_NEW_DEBUGGER_EXCEPTION_("can't allocate memory for shared file map header", 1); + } + + memset(pheader, 0, sizeof(struct FileMapHeader)); + // read FileMapHeader + size_t n = read(fd, pheader, sizeof(struct FileMapHeader)); + if (n != sizeof(struct FileMapHeader)) { + free(pheader); + close(fd); + char errMsg[ERR_MSG_SIZE]; + sprintf(errMsg, "unable to read shared archive file map header from %s", classes_jsa); + THROW_NEW_DEBUGGER_EXCEPTION_(errMsg, 1); + } + + // check file magic + if (pheader->_magic != 0xf00baba2) { + free(pheader); + close(fd); + char errMsg[ERR_MSG_SIZE]; + sprintf(errMsg, "%s has bad shared archive magic 0x%x, expecting 0xf00baba2", + classes_jsa, pheader->_magic); + THROW_NEW_DEBUGGER_EXCEPTION_(errMsg, 1); + } + + // check version + if (pheader->_version != CURRENT_ARCHIVE_VERSION) { + free(pheader); + close(fd); + char errMsg[ERR_MSG_SIZE]; + sprintf(errMsg, "%s has wrong shared archive version %d, expecting %d", + classes_jsa, pheader->_version, CURRENT_ARCHIVE_VERSION); + THROW_NEW_DEBUGGER_EXCEPTION_(errMsg, 1); + } + + if (_libsaproc_debug) { + for (int m = 0; m < NUM_SHARED_MAPS; m++) { + print_debug("shared file offset %d mapped at 0x%lx, size = %ld, read only? = %d\n", + pheader->_space[m]._file_offset, pheader->_space[m]._base, + 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); + CHECK_EXCEPTION; + + // 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 + atoi(cmdLine_cstr); + 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); + 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 + struct ps_prochandle* ph = proc_arg_grab(cmdLine_cstr, (isProcess? PR_ARG_PIDS : PR_ARG_CORES), PGRAB_FORCE, &gcode); + env->ReleaseStringUTFChars(cmdLine, cmdLine_cstr); + if (! ph) { + if (gcode > 0 && gcode < sizeof(proc_arg_grab_errmsgs)/sizeof(const char*)) { + char errMsg[ERR_MSG_SIZE]; + sprintf(errMsg, "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[_g].jsa". MAP_SHARED pages are not dumped + * in Solaris core.To read shared heap pages, we have to read classes[_g].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!"); + } + + if (p_td_init() != TD_OK) { + if (!sa_ignore_threaddb) { + detach_internal(env, this_obj); + } + HANDLE_THREADDB_FAILURE("Can't initialize thread_db!"); + } + + 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; + if (p_td_ta_new(ph, &p_td_thragent_t) != TD_OK) { + if (!sa_ignore_threaddb) { + detach_internal(env, this_obj); + } + HANDLE_THREADDB_FAILURE("Can't create thread_db agent!"); + } + 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) { + // 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; + if (p_td_ta_map_id2thr(p_td_thragent_t, (thread_t) tid, &thr_handle) != TD_OK) { + THROW_NEW_DEBUGGER_EXCEPTION_("can't map thread id to thread handle!", 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); + 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, 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); + + struct FileMapHeader* pheader = (struct FileMapHeader*) env->GetLongField(this_obj, p_file_map_header_ID); + // walk through the shared mappings -- we just have 4 of them. + // so, linear walking is okay. + for (int m = 0; m < NUM_SHARED_MAPS; 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) { + jlong baseAddress = (jlong) (uintptr_t) pheader->_space[m]._base; + size_t usedSize = pheader->_space[m]._used; + if (address >= baseAddress && address < (baseAddress + usedSize)) { + // the given address falls in this shared heap 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) { + jlong p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID); + jboolean isCopy; + jbyte* ptr = env->GetByteArrayElements(data, &isCopy); + CHECK_EXCEPTION; + + if (ps_pwrite((struct ps_prochandle*) p_ps_prochandle, address, ptr, numBytes) != PS_OK) { + env->ReleaseByteArrayElements(data, ptr, JNI_ABORT); + THROW_NEW_DEBUGGER_EXCEPTION("Process write failed!"); + } + + 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); + 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); + 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; +} + +typedef int (*find_file_hook_t)(const char *, int elf_checksum); + +/* + * 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!"); + + // If possible, set shared object find file hook. + void (*set_hook)(find_file_hook_t) = (void(*)(find_file_hook_t))dlsym(libproc_handle, "Pset_find_file_hook"); + if (set_hook) { + // we found find file hook symbol, set up our hook function. + set_hook(find_file_hook); + } else if (getenv(SA_ALTROOT)) { + printf("libsaproc WARNING: %s set, but can't set file hook. " \ + "Did you use right version of libproc.so?\n", SA_ALTROOT); + } + + 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; + + listAdd_ID = env->GetMethodID(env->FindClass("java/util/List"), "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; +}