| /* |
| * Copyright (c) 2002, 2013, 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" |
| #ifndef SOLARIS_11_B159_OR_LATER |
| #include <sys/utsname.h> |
| #endif |
| #include <thread_db.h> |
| #include <strings.h> |
| #include <limits.h> |
| #include <demangle.h> |
| #include <stdarg.h> |
| #include <stdlib.h> |
| #include <errno.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; |
| #ifndef SOLARIS_11_B159_OR_LATER |
| static bool _Pstack_iter_debug = false; |
| |
| static void dprintf_2(const char* format,...) { |
| if (_Pstack_iter_debug) { |
| va_list alist; |
| |
| va_start(alist, format); |
| fputs("Pstack_iter DEBUG: ", stderr); |
| vfprintf(stderr, format, alist); |
| va_end(alist); |
| } |
| } |
| #endif // !SOLARIS_11_B159_OR_LATER |
| |
| 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; |
| } |
| } |
| |
| // 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" int 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%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; |
| } |
| |
| // 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 |
| |
| // 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. |
| |
| 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]; |
| |
| // Ignore the rest of the FileMapHeader. We don't need those fields here. |
| }; |
| |
| 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" |
| // 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 = 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; |
| } |
| |
| 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 |
| 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.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!"); |
| } |
| |
| 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); |
| } |
| |
| #ifndef SOLARIS_11_B159_OR_LATER |
| // building on Nevada-B158 or earlier so more hoops to jump through |
| static bool has_newer_Pstack_iter = false; // older version by default |
| #endif |
| |
| /* |
| * 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); |
| |
| #ifdef SOLARIS_11_B159_OR_LATER |
| // building on Nevada-B159 or later so use the new callback |
| Pstack_iter((struct ps_prochandle*) p_ps_prochandle, gregs, |
| wrapper_fill_cframe_list, &dbgo2); |
| #else |
| // building on Nevada-B158 or earlier so figure out which callback to use |
| |
| if (has_newer_Pstack_iter) { |
| // Since we're building on Nevada-B158 or earlier, we have to |
| // cast wrapper_fill_cframe_list to make the compiler happy. |
| Pstack_iter((struct ps_prochandle*) p_ps_prochandle, gregs, |
| (proc_stack_f *)wrapper_fill_cframe_list, &dbgo2); |
| } else { |
| Pstack_iter((struct ps_prochandle*) p_ps_prochandle, gregs, |
| fill_cframe_list, &dbgo2); |
| } |
| #endif // SOLARIS_11_B159_OR_LATER |
| 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; |
| } |
| |
| #ifndef SOLARIS_11_B159_OR_LATER |
| // Determine if the OS we're running on has the newer version |
| // of libproc's Pstack_iter. |
| // |
| // Set env var PSTACK_ITER_DEBUG=true to debug this logic. |
| // Set env var PSTACK_ITER_DEBUG_RELEASE to simulate a 'release' value. |
| // Set env var PSTACK_ITER_DEBUG_VERSION to simulate a 'version' value. |
| // |
| // frankenputer 'uname -r -v': 5.10 Generic_141445-09 |
| // jurassic 'uname -r -v': 5.11 snv_164 |
| // lonepeak 'uname -r -v': 5.11 snv_127 |
| // |
| static void set_has_newer_Pstack_iter(JNIEnv *env) { |
| static bool done_set = false; |
| |
| if (done_set) { |
| // already set has_newer_Pstack_iter |
| return; |
| } |
| |
| struct utsname name; |
| if (uname(&name) == -1) { |
| THROW_NEW_DEBUGGER_EXCEPTION("uname() failed!"); |
| } |
| dprintf_2("release='%s' version='%s'\n", name.release, name.version); |
| |
| if (_Pstack_iter_debug) { |
| char *override = getenv("PSTACK_ITER_DEBUG_RELEASE"); |
| if (override != NULL) { |
| strncpy(name.release, override, SYS_NMLN - 1); |
| name.release[SYS_NMLN - 2] = '\0'; |
| dprintf_2("overriding with release='%s'\n", name.release); |
| } |
| override = getenv("PSTACK_ITER_DEBUG_VERSION"); |
| if (override != NULL) { |
| strncpy(name.version, override, SYS_NMLN - 1); |
| name.version[SYS_NMLN - 2] = '\0'; |
| dprintf_2("overriding with version='%s'\n", name.version); |
| } |
| } |
| |
| // the major number corresponds to the old SunOS major number |
| int major = atoi(name.release); |
| if (major >= 6) { |
| dprintf_2("release is SunOS 6 or later\n"); |
| has_newer_Pstack_iter = true; |
| done_set = true; |
| return; |
| } |
| if (major < 5) { |
| dprintf_2("release is SunOS 4 or earlier\n"); |
| done_set = true; |
| return; |
| } |
| |
| // some SunOS 5.* build so now check for Solaris versions |
| char *dot = strchr(name.release, '.'); |
| int minor = 0; |
| if (dot != NULL) { |
| // release is major.minor format |
| *dot = NULL; |
| minor = atoi(dot + 1); |
| } |
| |
| if (minor <= 10) { |
| dprintf_2("release is Solaris 10 or earlier\n"); |
| done_set = true; |
| return; |
| } else if (minor >= 12) { |
| dprintf_2("release is Solaris 12 or later\n"); |
| has_newer_Pstack_iter = true; |
| done_set = true; |
| return; |
| } |
| |
| // some Solaris 11 build so now check for internal build numbers |
| if (strncmp(name.version, "snv_", 4) != 0) { |
| dprintf_2("release is Solaris 11 post-GA or later\n"); |
| has_newer_Pstack_iter = true; |
| done_set = true; |
| return; |
| } |
| |
| // version begins with "snv_" so a pre-GA build of Solaris 11 |
| int build = atoi(&name.version[4]); |
| if (build >= 159) { |
| dprintf_2("release is Nevada-B159 or later\n"); |
| has_newer_Pstack_iter = true; |
| } else { |
| dprintf_2("release is Nevada-B158 or earlier\n"); |
| } |
| |
| done_set = true; |
| } |
| #endif // !SOLARIS_11_B159_OR_LATER |
| |
| /* |
| * 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!"); |
| |
| #ifndef SOLARIS_11_B159_OR_LATER |
| _Pstack_iter_debug = getenv("PSTACK_ITER_DEBUG") != NULL; |
| |
| set_has_newer_Pstack_iter(env); |
| CHECK_EXCEPTION; |
| dprintf_2("has_newer_Pstack_iter=%d\n", has_newer_Pstack_iter); |
| #endif |
| |
| 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; |
| } |