duke@435: /*
xdono@1014:  * Copyright 2002-2009 Sun Microsystems, Inc.  All Rights Reserved.
duke@435:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435:  *
duke@435:  * This code is free software; you can redistribute it and/or modify it
duke@435:  * under the terms of the GNU General Public License version 2 only, as
duke@435:  * published by the Free Software Foundation.
duke@435:  *
duke@435:  * This code is distributed in the hope that it will be useful, but WITHOUT
duke@435:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
duke@435:  * version 2 for more details (a copy is included in the LICENSE file that
duke@435:  * accompanied this code).
duke@435:  *
duke@435:  * You should have received a copy of the GNU General Public License version
duke@435:  * 2 along with this work; if not, write to the Free Software Foundation,
duke@435:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435:  *
duke@435:  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@435:  * CA 95054 USA or visit www.sun.com if you need additional information or
duke@435:  * have any questions.
duke@435:  *
duke@435:  */
duke@435: 
duke@435: #include "salibproc.h"
duke@435: #include "sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal.h"
duke@435: #include <thread_db.h>
duke@435: #include <strings.h>
duke@435: #include <limits.h>
duke@435: #include <demangle.h>
duke@435: #include <stdarg.h>
duke@435: #include <stdlib.h>
duke@435: #include <errno.h>
duke@435: 
duke@435: #define CHECK_EXCEPTION_(value) if(env->ExceptionOccurred()) { return value; }
duke@435: #define CHECK_EXCEPTION if(env->ExceptionOccurred()) { return;}
duke@435: #define THROW_NEW_DEBUGGER_EXCEPTION_(str, value) { throwNewDebuggerException(env, str); return value; }
duke@435: #define THROW_NEW_DEBUGGER_EXCEPTION(str) { throwNewDebuggerException(env, str); return;}
duke@435: 
duke@435: #define SYMBOL_BUF_SIZE  256
duke@435: #define ERR_MSG_SIZE     (PATH_MAX + 256)
duke@435: 
duke@435: // debug mode
duke@435: static int _libsaproc_debug = 0;
duke@435: 
duke@435: static void print_debug(const char* format,...) {
duke@435:   if (_libsaproc_debug) {
duke@435:     va_list alist;
duke@435: 
duke@435:     va_start(alist, format);
duke@435:     fputs("libsaproc DEBUG: ", stderr);
duke@435:     vfprintf(stderr, format, alist);
duke@435:     va_end(alist);
duke@435:   }
duke@435: }
duke@435: 
duke@435: struct Debugger {
duke@435:     JNIEnv* env;
duke@435:     jobject this_obj;
duke@435: };
duke@435: 
duke@435: struct DebuggerWithObject : Debugger {
duke@435:     jobject obj;
duke@435: };
duke@435: 
duke@435: struct DebuggerWith2Objects : DebuggerWithObject {
duke@435:     jobject obj2;
duke@435: };
duke@435: 
duke@435: /*
duke@435: * Portions of user thread level detail gathering code is from pstack source
duke@435: * code. See pstack.c in Solaris 2.8 user commands source code.
duke@435: */
duke@435: 
duke@435: static void throwNewDebuggerException(JNIEnv* env, const char* errMsg) {
duke@435:   env->ThrowNew(env->FindClass("sun/jvm/hotspot/debugger/DebuggerException"), errMsg);
duke@435: }
duke@435: 
duke@435: // JNI ids for some fields, methods
duke@435: 
duke@435: // libproc handler pointer
duke@435: static jfieldID p_ps_prochandle_ID = 0;
duke@435: 
duke@435: // libthread.so dlopen handle, thread agent ptr and function pointers
duke@435: static jfieldID libthread_db_handle_ID   = 0;
duke@435: static jfieldID p_td_thragent_t_ID       = 0;
duke@435: static jfieldID p_td_init_ID             = 0;
duke@435: static jfieldID p_td_ta_new_ID           = 0;
duke@435: static jfieldID p_td_ta_delete_ID        = 0;
duke@435: static jfieldID p_td_ta_thr_iter_ID      = 0;
duke@435: static jfieldID p_td_thr_get_info_ID     = 0;
duke@435: static jfieldID p_td_ta_map_id2thr_ID    = 0;
duke@435: static jfieldID p_td_thr_getgregs_ID     = 0;
duke@435: 
duke@435: // reg index fields
duke@435: static jfieldID pcRegIndex_ID            = 0;
duke@435: static jfieldID fpRegIndex_ID            = 0;
duke@435: 
duke@435: // part of the class sharing workaround
duke@435: static jfieldID classes_jsa_fd_ID        = 0;
duke@435: static jfieldID p_file_map_header_ID     = 0;
duke@435: 
duke@435: // method ids
duke@435: 
duke@435: static jmethodID getThreadForThreadId_ID = 0;
duke@435: static jmethodID createSenderFrame_ID    = 0;
duke@435: static jmethodID createLoadObject_ID     = 0;
duke@435: static jmethodID createClosestSymbol_ID  = 0;
duke@435: static jmethodID listAdd_ID              = 0;
duke@435: 
duke@435: /*
duke@435:  * Functions we need from libthread_db
duke@435:  */
duke@435: typedef td_err_e
duke@435:         (*p_td_init_t)(void);
duke@435: typedef td_err_e
duke@435:         (*p_td_ta_new_t)(void *, td_thragent_t **);
duke@435: typedef td_err_e
duke@435:         (*p_td_ta_delete_t)(td_thragent_t *);
duke@435: typedef td_err_e
duke@435:         (*p_td_ta_thr_iter_t)(const td_thragent_t *, td_thr_iter_f *, void *,
duke@435:                 td_thr_state_e, int, sigset_t *, unsigned);
duke@435: typedef td_err_e
duke@435:         (*p_td_thr_get_info_t)(const td_thrhandle_t *, td_thrinfo_t *);
duke@435: typedef td_err_e
duke@435:         (*p_td_ta_map_id2thr_t)(const td_thragent_t *, thread_t,  td_thrhandle_t *);
duke@435: typedef td_err_e
duke@435:         (*p_td_thr_getgregs_t)(const td_thrhandle_t *, prgregset_t);
duke@435: 
duke@435: static void
duke@435: clear_libthread_db_ptrs(JNIEnv* env, jobject this_obj) {
duke@435:   // release libthread_db agent, if we had created
duke@435:   p_td_ta_delete_t p_td_ta_delete = 0;
duke@435:   p_td_ta_delete = (p_td_ta_delete_t) env->GetLongField(this_obj, p_td_ta_delete_ID);
duke@435: 
duke@435:   td_thragent_t *p_td_thragent_t = 0;
duke@435:   p_td_thragent_t = (td_thragent_t*) env->GetLongField(this_obj, p_td_thragent_t_ID);
duke@435:   if (p_td_thragent_t != 0 && p_td_ta_delete != 0) {
duke@435:      p_td_ta_delete(p_td_thragent_t);
duke@435:   }
duke@435: 
duke@435:   // dlclose libthread_db.so
duke@435:   void* libthread_db_handle = (void*) env->GetLongField(this_obj, libthread_db_handle_ID);
duke@435:   if (libthread_db_handle != 0) {
duke@435:     dlclose(libthread_db_handle);
duke@435:   }
duke@435: 
duke@435:   env->SetLongField(this_obj, libthread_db_handle_ID, (jlong)0);
duke@435:   env->SetLongField(this_obj, p_td_init_ID, (jlong)0);
duke@435:   env->SetLongField(this_obj, p_td_ta_new_ID, (jlong)0);
duke@435:   env->SetLongField(this_obj, p_td_ta_delete_ID, (jlong)0);
duke@435:   env->SetLongField(this_obj, p_td_ta_thr_iter_ID, (jlong)0);
duke@435:   env->SetLongField(this_obj, p_td_thr_get_info_ID, (jlong)0);
duke@435:   env->SetLongField(this_obj, p_td_ta_map_id2thr_ID, (jlong)0);
duke@435:   env->SetLongField(this_obj, p_td_thr_getgregs_ID, (jlong)0);
duke@435: }
duke@435: 
duke@435: 
duke@435: static void detach_internal(JNIEnv* env, jobject this_obj) {
duke@435:   // clear libthread_db stuff
duke@435:   clear_libthread_db_ptrs(env, this_obj);
duke@435: 
duke@435:   // release ptr to ps_prochandle
duke@435:   jlong p_ps_prochandle;
duke@435:   p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
duke@435:   if (p_ps_prochandle != 0L) {
duke@435:     Prelease((struct ps_prochandle*) p_ps_prochandle, PRELEASE_CLEAR);
duke@435:   }
duke@435: 
duke@435:   // part of the class sharing workaround
duke@435:   int classes_jsa_fd = env->GetIntField(this_obj, classes_jsa_fd_ID);
duke@435:   if (classes_jsa_fd != -1) {
duke@435:     close(classes_jsa_fd);
duke@435:     struct FileMapHeader* pheader = (struct FileMapHeader*) env->GetLongField(this_obj, p_file_map_header_ID);
duke@435:     if (pheader != NULL) {
duke@435:       free(pheader);
duke@435:     }
duke@435:   }
duke@435: }
duke@435: 
duke@435: // Is it okay to ignore libthread_db failure? Set env var to ignore
duke@435: // libthread_db failure. You can still debug, but will miss threads
duke@435: // related functionality.
duke@435: static bool sa_ignore_threaddb = (getenv("SA_IGNORE_THREADDB") != 0);
duke@435: 
duke@435: #define HANDLE_THREADDB_FAILURE(msg)          \
duke@435:   if (sa_ignore_threaddb) {                   \
duke@435:      printf("libsaproc WARNING: %s\n", msg);  \
duke@435:      return;                                  \
duke@435:   } else {                                    \
duke@435:      THROW_NEW_DEBUGGER_EXCEPTION(msg);       \
duke@435:   }
duke@435: 
duke@435: #define HANDLE_THREADDB_FAILURE_(msg, ret)    \
duke@435:   if (sa_ignore_threaddb) {                   \
duke@435:      printf("libsaproc WARNING: %s\n", msg);  \
duke@435:      return ret;                              \
duke@435:   } else {                                    \
duke@435:      THROW_NEW_DEBUGGER_EXCEPTION_(msg, ret); \
duke@435:   }
duke@435: 
duke@435: static const char * alt_root = NULL;
duke@435: static int alt_root_len = -1;
duke@435: 
duke@435: #define SA_ALTROOT "SA_ALTROOT"
duke@435: 
duke@435: static void init_alt_root() {
duke@435:   if (alt_root_len == -1) {
duke@435:     alt_root = getenv(SA_ALTROOT);
duke@435:     if (alt_root)
duke@435:       alt_root_len = strlen(alt_root);
duke@435:     else
duke@435:       alt_root_len = 0;
duke@435:   }
duke@435: }
duke@435: 
duke@435: static int find_file_hook(const char * name, int elf_checksum) {
duke@435:   init_alt_root();
duke@435: 
duke@435:   if (_libsaproc_debug) {
duke@435:     printf("libsaproc DEBUG: find_file_hook %s 0x%x\n", name, elf_checksum);
duke@435:   }
duke@435: 
duke@435:   if (alt_root_len > 0) {
duke@435:     int fd = -1;
duke@435:     char alt_path[PATH_MAX+1];
duke@435: 
duke@435:     strcpy(alt_path, alt_root);
duke@435:     strcat(alt_path, name);
duke@435:     fd = open(alt_path, O_RDONLY);
duke@435:     if (fd >= 0) {
duke@435:       if (_libsaproc_debug) {
duke@435:         printf("libsaproc DEBUG: find_file_hook substituted %s\n", alt_path);
duke@435:       }
duke@435:       return fd;
duke@435:     }
duke@435: 
duke@435:     if (strrchr(name, '/')) {
duke@435:       strcpy(alt_path, alt_root);
duke@435:       strcat(alt_path, strrchr(name, '/'));
duke@435:       fd = open(alt_path, O_RDONLY);
duke@435:       if (fd >= 0) {
duke@435:         if (_libsaproc_debug) {
duke@435:           printf("libsaproc DEBUG: find_file_hook substituted %s\n", alt_path);
duke@435:         }
duke@435:         return fd;
duke@435:       }
duke@435:     }
duke@435:   }
duke@435:   return -1;
duke@435: }
duke@435: 
duke@435: static int pathmap_open(const char* name) {
duke@435:   int fd = open(name, O_RDONLY);
duke@435:   if (fd < 0) {
duke@435:     fd = find_file_hook(name, 0);
duke@435:   }
duke@435:   return fd;
duke@435: }
duke@435: 
duke@435: static void * pathmap_dlopen(const char * name, int mode) {
duke@435:   init_alt_root();
duke@435: 
duke@435:   if (_libsaproc_debug) {
duke@435:     printf("libsaproc DEBUG: pathmap_dlopen %s\n", name);
duke@435:   }
duke@435: 
duke@435:   void * handle = NULL;
duke@435:   if (alt_root_len > 0) {
duke@435:     char alt_path[PATH_MAX+1];
duke@435:     strcpy(alt_path, alt_root);
duke@435:     strcat(alt_path, name);
duke@435:     handle = dlopen(alt_path, mode);
duke@435:     if (_libsaproc_debug && handle) {
duke@435:       printf("libsaproc DEBUG: pathmap_dlopen substituted %s\n", alt_path);
duke@435:     }
duke@435: 
duke@435:     if (handle == NULL && strrchr(name, '/')) {
duke@435:       strcpy(alt_path, alt_root);
duke@435:       strcat(alt_path, strrchr(name, '/'));
duke@435:       handle = dlopen(alt_path, mode);
duke@435:       if (_libsaproc_debug && handle) {
duke@435:         printf("libsaproc DEBUG: pathmap_dlopen substituted %s\n", alt_path);
duke@435:       }
duke@435:     }
duke@435:   }
duke@435:   if (handle == NULL) {
duke@435:     handle = dlopen(name, mode);
duke@435:   }
duke@435:   if (_libsaproc_debug) {
duke@435:     printf("libsaproc DEBUG: pathmap_dlopen %s return 0x%x\n", name, handle);
duke@435:   }
duke@435:   return handle;
duke@435: }
duke@435: 
duke@435: // libproc and libthread_db callback functions
duke@435: 
duke@435: extern "C" {
duke@435: 
duke@435: static int
duke@435: init_libthread_db_ptrs(void *cd, const prmap_t *pmp, const char *object_name) {
duke@435:   Debugger* dbg = (Debugger*) cd;
duke@435:   JNIEnv* env = dbg->env;
duke@435:   jobject this_obj = dbg->this_obj;
duke@435:   struct ps_prochandle* ph = (struct ps_prochandle*) env->GetLongField(this_obj, p_ps_prochandle_ID);
duke@435: 
duke@435:   char *s1 = 0, *s2 = 0;
duke@435:   char libthread_db[PATH_MAX];
duke@435: 
duke@435:   if (strstr(object_name, "/libthread.so.") == NULL)
duke@435:      return (0);
duke@435: 
duke@435:   /*
duke@435:    * We found a libthread.
duke@435:    * dlopen() the matching libthread_db and get the thread agent handle.
duke@435:    */
duke@435:   if (Pstatus(ph)->pr_dmodel == PR_MODEL_NATIVE) {
duke@435:      (void) strcpy(libthread_db, object_name);
duke@435:      s1 = (char*) strstr(object_name, ".so.");
duke@435:      s2 = (char*) strstr(libthread_db, ".so.");
duke@435:      (void) strcpy(s2, "_db");
duke@435:      s2 += 3;
duke@435:      (void) strcpy(s2, s1);
duke@435:   } else {
duke@435: #ifdef _LP64
duke@435:      /*
duke@435:       * The victim process is 32-bit, we are 64-bit.
duke@435:       * We have to find the 64-bit version of libthread_db
duke@435:       * that matches the victim's 32-bit version of libthread.
duke@435:       */
duke@435:      (void) strcpy(libthread_db, object_name);
duke@435:      s1 = (char*) strstr(object_name, "/libthread.so.");
duke@435:      s2 = (char*) strstr(libthread_db, "/libthread.so.");
duke@435:      (void) strcpy(s2, "/64");
duke@435:      s2 += 3;
duke@435:      (void) strcpy(s2, s1);
duke@435:      s1 = (char*) strstr(s1, ".so.");
duke@435:      s2 = (char*) strstr(s2, ".so.");
duke@435:      (void) strcpy(s2, "_db");
duke@435:      s2 += 3;
duke@435:      (void) strcpy(s2, s1);
duke@435: #else
duke@435:      return (0);
duke@435: #endif  /* _LP64 */
duke@435:   }
duke@435: 
duke@435:   void* libthread_db_handle = 0;
duke@435:   if ((libthread_db_handle = pathmap_dlopen(libthread_db, RTLD_LAZY|RTLD_LOCAL)) == NULL) {
duke@435:      char errMsg[PATH_MAX + 256];
duke@435:      sprintf(errMsg, "Can't load %s!", libthread_db);
duke@435:      HANDLE_THREADDB_FAILURE_(errMsg, 0);
duke@435:   }
duke@435:   env->SetLongField(this_obj, libthread_db_handle_ID, (jlong)(uintptr_t)libthread_db_handle);
duke@435: 
duke@435:   void* tmpPtr = 0;
duke@435:   tmpPtr = dlsym(libthread_db_handle, "td_init");
duke@435:   if (tmpPtr == 0) {
duke@435:      HANDLE_THREADDB_FAILURE_("dlsym failed on td_init!", 0);
duke@435:   }
duke@435:   env->SetLongField(this_obj, p_td_init_ID, (jlong)(uintptr_t) tmpPtr);
duke@435: 
duke@435:   tmpPtr =dlsym(libthread_db_handle, "td_ta_new");
duke@435:   if (tmpPtr == 0) {
duke@435:      HANDLE_THREADDB_FAILURE_("dlsym failed on td_ta_new!", 0);
duke@435:   }
duke@435:   env->SetLongField(this_obj, p_td_ta_new_ID, (jlong)(uintptr_t) tmpPtr);
duke@435: 
duke@435:   tmpPtr = dlsym(libthread_db_handle, "td_ta_delete");
duke@435:   if (tmpPtr == 0) {
duke@435:      HANDLE_THREADDB_FAILURE_("dlsym failed on td_ta_delete!", 0);
duke@435:   }
duke@435:   env->SetLongField(this_obj, p_td_ta_delete_ID, (jlong)(uintptr_t) tmpPtr);
duke@435: 
duke@435:   tmpPtr = dlsym(libthread_db_handle, "td_ta_thr_iter");
duke@435:   if (tmpPtr == 0) {
duke@435:      HANDLE_THREADDB_FAILURE_("dlsym failed on td_ta_thr_iter!", 0);
duke@435:   }
duke@435:   env->SetLongField(this_obj, p_td_ta_thr_iter_ID, (jlong)(uintptr_t) tmpPtr);
duke@435: 
duke@435:   tmpPtr = dlsym(libthread_db_handle, "td_thr_get_info");
duke@435:   if (tmpPtr == 0) {
duke@435:      HANDLE_THREADDB_FAILURE_("dlsym failed on td_thr_get_info!", 0);
duke@435:   }
duke@435:   env->SetLongField(this_obj, p_td_thr_get_info_ID, (jlong)(uintptr_t) tmpPtr);
duke@435: 
duke@435:   tmpPtr = dlsym(libthread_db_handle, "td_ta_map_id2thr");
duke@435:   if (tmpPtr == 0) {
duke@435:      HANDLE_THREADDB_FAILURE_("dlsym failed on td_ta_map_id2thr!", 0);
duke@435:   }
duke@435:   env->SetLongField(this_obj, p_td_ta_map_id2thr_ID, (jlong)(uintptr_t) tmpPtr);
duke@435: 
duke@435:   tmpPtr = dlsym(libthread_db_handle, "td_thr_getgregs");
duke@435:   if (tmpPtr == 0) {
duke@435:      HANDLE_THREADDB_FAILURE_("dlsym failed on td_thr_getgregs!", 0);
duke@435:   }
duke@435:   env->SetLongField(this_obj, p_td_thr_getgregs_ID, (jlong)(uintptr_t) tmpPtr);
duke@435: 
duke@435:   return 1;
duke@435: }
duke@435: 
duke@435: static int
duke@435: fill_thread_list(const td_thrhandle_t *p_td_thragent_t, void* cd) {
duke@435:   DebuggerWithObject* dbgo = (DebuggerWithObject*) cd;
duke@435:   JNIEnv* env = dbgo->env;
duke@435:   jobject this_obj = dbgo->this_obj;
duke@435:   jobject list = dbgo->obj;
duke@435: 
duke@435:   td_thrinfo_t thrinfo;
duke@435:   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);
duke@435: 
duke@435:   if (p_td_thr_get_info(p_td_thragent_t, &thrinfo) != TD_OK)
duke@435:     return (0);
duke@435: 
duke@435:   jobject threadProxy = env->CallObjectMethod(this_obj, getThreadForThreadId_ID, (jlong)(uintptr_t) thrinfo.ti_tid);
duke@435:   CHECK_EXCEPTION_(1);
duke@435:   env->CallBooleanMethod(list, listAdd_ID, threadProxy);
duke@435:   CHECK_EXCEPTION_(1);
duke@435:   return 0;
duke@435: }
duke@435: 
duke@435: static int
duke@435: fill_load_object_list(void *cd, const prmap_t* pmp, const char* obj_name) {
duke@435: 
duke@435:   if (obj_name) {
duke@435:      DebuggerWithObject* dbgo = (DebuggerWithObject*) cd;
duke@435:      JNIEnv* env = dbgo->env;
duke@435:      jobject this_obj = dbgo->this_obj;
duke@435:      jobject list = dbgo->obj;
duke@435: 
duke@435:      jstring objectName = env->NewStringUTF(obj_name);
duke@435:      CHECK_EXCEPTION_(1);
duke@435: 
duke@435:      jlong mapSize = (jlong) pmp->pr_size;
duke@435:      jobject sharedObject = env->CallObjectMethod(this_obj, createLoadObject_ID,
duke@435:                                   objectName, mapSize, (jlong)(uintptr_t)pmp->pr_vaddr);
duke@435:      CHECK_EXCEPTION_(1);
duke@435:      env->CallBooleanMethod(list, listAdd_ID, sharedObject);
duke@435:      CHECK_EXCEPTION_(1);
duke@435:   }
duke@435: 
duke@435:   return 0;
duke@435: }
duke@435: 
duke@435: static int
duke@435: fill_cframe_list(void *cd, const prgregset_t regs, uint_t argc, const long *argv) {
duke@435:   DebuggerWith2Objects* dbgo2 = (DebuggerWith2Objects*) cd;
duke@435:   JNIEnv* env = dbgo2->env;
duke@435:   jobject this_obj = dbgo2->this_obj;
duke@435:   jobject curFrame = dbgo2->obj2;
duke@435: 
duke@435:   jint pcRegIndex = env->GetIntField(this_obj, pcRegIndex_ID);
duke@435:   jint fpRegIndex = env->GetIntField(this_obj, fpRegIndex_ID);
duke@435: 
duke@435:   jlong pc = (jlong) (uintptr_t) regs[pcRegIndex];
duke@435:   jlong fp = (jlong) (uintptr_t) regs[fpRegIndex];
duke@435: 
duke@435:   dbgo2->obj2 = env->CallObjectMethod(this_obj, createSenderFrame_ID,
duke@435:                                     curFrame, pc, fp);
duke@435:   CHECK_EXCEPTION_(1);
duke@435:   if (dbgo2->obj == 0) {
duke@435:      dbgo2->obj = dbgo2->obj2;
duke@435:   }
duke@435:   return 0;
duke@435: }
duke@435: 
duke@435: // part of the class sharing workaround
duke@435: 
duke@435: // FIXME: !!HACK ALERT!!
duke@435: 
duke@435: // The format of sharing achive file header is needed to read shared heap
duke@435: // file mappings. For now, I am hard coding portion of FileMapHeader here.
duke@435: // Refer to filemap.hpp.
duke@435: 
duke@435: // FileMapHeader describes the shared space data in the file to be
duke@435: // mapped.  This structure gets written to a file.  It is not a class, so
duke@435: // that the compilers don't add any compiler-private data to it.
duke@435: 
duke@435: // Refer to CompactingPermGenGen::n_regions in compactingPermGenGen.hpp
duke@435: const int NUM_SHARED_MAPS = 4;
duke@435: 
duke@435: // Refer to FileMapInfo::_current_version in filemap.hpp
duke@435: const int CURRENT_ARCHIVE_VERSION = 1;
duke@435: 
duke@435: struct FileMapHeader {
duke@435:  int   _magic;              // identify file type.
duke@435:  int   _version;            // (from enum, above.)
duke@435:  size_t _alignment;         // how shared archive should be aligned
duke@435: 
duke@435: 
duke@435:  struct space_info {
duke@435:    int    _file_offset;     // sizeof(this) rounded to vm page size
duke@435:    char*  _base;            // copy-on-write base address
duke@435:    size_t _capacity;        // for validity checking
duke@435:    size_t _used;            // for setting space top on read
duke@435: 
duke@435:    bool   _read_only;       // read only space?
duke@435:    bool   _allow_exec;      // executable code in space?
duke@435: 
duke@435:  } _space[NUM_SHARED_MAPS]; // was _space[CompactingPermGenGen::n_regions];
duke@435: 
duke@435:  // Ignore the rest of the FileMapHeader. We don't need those fields here.
duke@435: };
duke@435: 
duke@435: static bool
swamyv@964: read_jboolean(struct ps_prochandle* ph, psaddr_t addr, jboolean* pvalue) {
swamyv@964:   jboolean i;
duke@435:   if (ps_pread(ph, addr, &i, sizeof(i)) == PS_OK) {
duke@435:     *pvalue = i;
duke@435:     return true;
duke@435:   } else {
duke@435:     return false;
duke@435:   }
duke@435: }
duke@435: 
duke@435: static bool
duke@435: read_pointer(struct ps_prochandle* ph, psaddr_t addr, uintptr_t* pvalue) {
duke@435:   uintptr_t uip;
duke@435:   if (ps_pread(ph, addr, &uip, sizeof(uip)) == PS_OK) {
duke@435:     *pvalue = uip;
duke@435:     return true;
duke@435:   } else {
duke@435:     return false;
duke@435:   }
duke@435: }
duke@435: 
duke@435: static bool
duke@435: read_string(struct ps_prochandle* ph, psaddr_t addr, char* buf, size_t size) {
duke@435:   char ch = ' ';
duke@435:   size_t i = 0;
duke@435: 
duke@435:   while (ch != '\0') {
duke@435:     if (ps_pread(ph, addr, &ch, sizeof(ch)) != PS_OK)
duke@435:       return false;
duke@435: 
duke@435:     if (i < size - 1) {
duke@435:       buf[i] = ch;
duke@435:     } else { // smaller buffer
duke@435:       return false;
duke@435:     }
duke@435: 
duke@435:     i++; addr++;
duke@435:   }
duke@435: 
duke@435:   buf[i] = '\0';
duke@435:   return true;
duke@435: }
duke@435: 
duke@435: #define USE_SHARED_SPACES_SYM   "UseSharedSpaces"
duke@435: // mangled symbol name for Arguments::SharedArchivePath
duke@435: #define SHARED_ARCHIVE_PATH_SYM "__1cJArgumentsRSharedArchivePath_"
duke@435: 
duke@435: static int
duke@435: init_classsharing_workaround(void *cd, const prmap_t* pmap, const char* obj_name) {
duke@435:   Debugger* dbg = (Debugger*) cd;
duke@435:   JNIEnv*   env = dbg->env;
duke@435:   jobject this_obj = dbg->this_obj;
duke@435:   const char* jvm_name = 0;
duke@435:   if ((jvm_name = strstr(obj_name, "libjvm.so")) != NULL ||
duke@435:       (jvm_name = strstr(obj_name, "libjvm_g.so")) != NULL) {
duke@435:     jvm_name = obj_name;
duke@435:   } else {
duke@435:     return 0;
duke@435:   }
duke@435: 
duke@435:   struct ps_prochandle* ph = (struct ps_prochandle*) env->GetLongField(this_obj, p_ps_prochandle_ID);
duke@435: 
duke@435:   // initialize classes[_g].jsa file descriptor field.
duke@435:   dbg->env->SetIntField(this_obj, classes_jsa_fd_ID, -1);
duke@435: 
duke@435:   // check whether class sharing is on by reading variable "UseSharedSpaces"
duke@435:   psaddr_t useSharedSpacesAddr = 0;
duke@435:   ps_pglobal_lookup(ph, jvm_name, USE_SHARED_SPACES_SYM, &useSharedSpacesAddr);
duke@435:   if (useSharedSpacesAddr == 0) {
duke@435:     THROW_NEW_DEBUGGER_EXCEPTION_("can't find 'UseSharedSpaces' flag\n", 1);
duke@435:   }
duke@435: 
duke@435:   // read the value of the flag "UseSharedSpaces"
swamyv@964:   // Since hotspot types are not available to build this library. So
swamyv@964:   // equivalent type "jboolean" is used to read the value of "UseSharedSpaces"
swamyv@964:   // which is same as hotspot type "bool".
swamyv@964:   jboolean value = 0;
swamyv@964:   if (read_jboolean(ph, useSharedSpacesAddr, &value) != true) {
duke@435:     THROW_NEW_DEBUGGER_EXCEPTION_("can't read 'UseSharedSpaces' flag", 1);
swamyv@964:   } else if ((int)value == 0) {
duke@435:     print_debug("UseSharedSpaces is false, assuming -Xshare:off!\n");
duke@435:     return 1;
duke@435:   }
duke@435: 
duke@435:   char classes_jsa[PATH_MAX];
duke@435:   psaddr_t sharedArchivePathAddrAddr = 0;
duke@435:   ps_pglobal_lookup(ph, jvm_name, SHARED_ARCHIVE_PATH_SYM, &sharedArchivePathAddrAddr);
duke@435:   if (sharedArchivePathAddrAddr == 0) {
duke@435:     print_debug("can't find symbol 'Arguments::SharedArchivePath'\n");
duke@435:     THROW_NEW_DEBUGGER_EXCEPTION_("can't get shared archive path from debuggee", 1);
duke@435:   }
duke@435: 
duke@435:   uintptr_t sharedArchivePathAddr = 0;
duke@435:   if (read_pointer(ph, sharedArchivePathAddrAddr, &sharedArchivePathAddr) != true) {
duke@435:     print_debug("can't find read pointer 'Arguments::SharedArchivePath'\n");
duke@435:     THROW_NEW_DEBUGGER_EXCEPTION_("can't get shared archive path from debuggee", 1);
duke@435:   }
duke@435: 
duke@435:   if (read_string(ph, (psaddr_t)sharedArchivePathAddr, classes_jsa, sizeof(classes_jsa)) != true) {
duke@435:     print_debug("can't find read 'Arguments::SharedArchivePath' value\n");
duke@435:     THROW_NEW_DEBUGGER_EXCEPTION_("can't get shared archive path from debuggee", 1);
duke@435:   }
duke@435: 
duke@435:   print_debug("looking for %s\n", classes_jsa);
duke@435: 
duke@435:   // open the classes[_g].jsa
duke@435:   int fd = pathmap_open(classes_jsa);
duke@435:   if (fd < 0) {
duke@435:     char errMsg[ERR_MSG_SIZE];
duke@435:     sprintf(errMsg, "can't open shared archive file %s", classes_jsa);
duke@435:     THROW_NEW_DEBUGGER_EXCEPTION_(errMsg, 1);
duke@435:   } else {
duke@435:     print_debug("opened shared archive file %s\n", classes_jsa);
duke@435:   }
duke@435: 
duke@435:   // parse classes[_g].jsa
duke@435:   struct FileMapHeader* pheader = (struct FileMapHeader*) malloc(sizeof(struct FileMapHeader));
duke@435:   if (pheader == NULL) {
duke@435:     close(fd);
duke@435:     THROW_NEW_DEBUGGER_EXCEPTION_("can't allocate memory for shared file map header", 1);
duke@435:   }
duke@435: 
duke@435:   memset(pheader, 0, sizeof(struct FileMapHeader));
duke@435:   // read FileMapHeader
duke@435:   size_t n = read(fd, pheader, sizeof(struct FileMapHeader));
duke@435:   if (n != sizeof(struct FileMapHeader)) {
duke@435:     free(pheader);
duke@435:     close(fd);
duke@435:     char errMsg[ERR_MSG_SIZE];
duke@435:     sprintf(errMsg, "unable to read shared archive file map header from %s", classes_jsa);
duke@435:     THROW_NEW_DEBUGGER_EXCEPTION_(errMsg, 1);
duke@435:   }
duke@435: 
duke@435:   // check file magic
duke@435:   if (pheader->_magic != 0xf00baba2) {
duke@435:     free(pheader);
duke@435:     close(fd);
duke@435:     char errMsg[ERR_MSG_SIZE];
duke@435:     sprintf(errMsg, "%s has bad shared archive magic 0x%x, expecting 0xf00baba2",
duke@435:                    classes_jsa, pheader->_magic);
duke@435:     THROW_NEW_DEBUGGER_EXCEPTION_(errMsg, 1);
duke@435:   }
duke@435: 
duke@435:   // check version
duke@435:   if (pheader->_version != CURRENT_ARCHIVE_VERSION) {
duke@435:     free(pheader);
duke@435:     close(fd);
duke@435:     char errMsg[ERR_MSG_SIZE];
duke@435:     sprintf(errMsg, "%s has wrong shared archive version %d, expecting %d",
duke@435:                    classes_jsa, pheader->_version, CURRENT_ARCHIVE_VERSION);
duke@435:     THROW_NEW_DEBUGGER_EXCEPTION_(errMsg, 1);
duke@435:   }
duke@435: 
duke@435:   if (_libsaproc_debug) {
duke@435:     for (int m = 0; m < NUM_SHARED_MAPS; m++) {
duke@435:        print_debug("shared file offset %d mapped at 0x%lx, size = %ld, read only? = %d\n",
duke@435:           pheader->_space[m]._file_offset, pheader->_space[m]._base,
duke@435:           pheader->_space[m]._used, pheader->_space[m]._read_only);
duke@435:     }
duke@435:   }
duke@435: 
duke@435:   // FIXME: For now, omitting other checks such as VM version etc.
duke@435: 
duke@435:   // store class archive file fd and map header in debugger object fields
duke@435:   dbg->env->SetIntField(this_obj, classes_jsa_fd_ID, fd);
duke@435:   dbg->env->SetLongField(this_obj, p_file_map_header_ID, (jlong)(uintptr_t) pheader);
duke@435:   return 1;
duke@435: }
duke@435: 
duke@435: } // extern "C"
duke@435: 
duke@435: // error messages for proc_arg_grab failure codes. The messages are
duke@435: // modified versions of comments against corresponding #defines in
duke@435: // libproc.h.
duke@435: static const char* proc_arg_grab_errmsgs[] = {
duke@435:                       "",
duke@435:  /* G_NOPROC */       "No such process",
duke@435:  /* G_NOCORE */       "No such core file",
duke@435:  /* G_NOPROCORCORE */ "No such process or core",
duke@435:  /* G_NOEXEC */       "Cannot locate executable file",
duke@435:  /* G_ZOMB   */       "Zombie processs",
duke@435:  /* G_PERM   */       "No permission to attach",
duke@435:  /* G_BUSY   */       "Another process has already attached",
duke@435:  /* G_SYS    */       "System process - can not attach",
duke@435:  /* G_SELF   */       "Process is self - can't debug myself!",
duke@435:  /* G_INTR   */       "Interrupt received while grabbing",
duke@435:  /* G_LP64   */       "debuggee is 64 bit, use java -d64 for debugger",
duke@435:  /* G_FORMAT */       "File is not an ELF format core file - corrupted core?",
duke@435:  /* G_ELF    */       "Libelf error while parsing an ELF file",
duke@435:  /* G_NOTE   */       "Required PT_NOTE Phdr not present - corrupted core?",
duke@435: };
duke@435: 
duke@435: static void attach_internal(JNIEnv* env, jobject this_obj, jstring cmdLine, jboolean isProcess) {
duke@435:   jboolean isCopy;
duke@435:   int gcode;
duke@435:   const char* cmdLine_cstr = env->GetStringUTFChars(cmdLine, &isCopy);
duke@435:   CHECK_EXCEPTION;
duke@435: 
duke@435:   // some older versions of libproc.so crash when trying to attach 32 bit
duke@435:   // debugger to 64 bit core file. check and throw error.
duke@435: #ifndef _LP64
duke@435:   atoi(cmdLine_cstr);
duke@435:   if (errno) {
duke@435:      // core file
duke@435:      int core_fd;
duke@435:      if ((core_fd = open64(cmdLine_cstr, O_RDONLY)) >= 0) {
duke@435:         Elf32_Ehdr e32;
duke@435:         if (pread64(core_fd, &e32, sizeof (e32), 0) == sizeof (e32) &&
duke@435:             memcmp(&e32.e_ident[EI_MAG0], ELFMAG, SELFMAG) == 0 &&
duke@435:             e32.e_type == ET_CORE && e32.e_ident[EI_CLASS] == ELFCLASS64) {
duke@435:               close(core_fd);
duke@435:               THROW_NEW_DEBUGGER_EXCEPTION("debuggee is 64 bit, use java -d64 for debugger");
duke@435:         }
duke@435:         close(core_fd);
duke@435:      }
duke@435:      // all other conditions are handled by libproc.so.
duke@435:   }
duke@435: #endif
duke@435: 
duke@435:   // connect to process/core
duke@435:   struct ps_prochandle* ph = proc_arg_grab(cmdLine_cstr, (isProcess? PR_ARG_PIDS : PR_ARG_CORES), PGRAB_FORCE, &gcode);
duke@435:   env->ReleaseStringUTFChars(cmdLine, cmdLine_cstr);
duke@435:   if (! ph) {
duke@435:      if (gcode > 0 && gcode < sizeof(proc_arg_grab_errmsgs)/sizeof(const char*)) {
duke@435:         char errMsg[ERR_MSG_SIZE];
duke@435:         sprintf(errMsg, "Attach failed : %s", proc_arg_grab_errmsgs[gcode]);
duke@435:         THROW_NEW_DEBUGGER_EXCEPTION(errMsg);
duke@435:     } else {
duke@435:         if (_libsaproc_debug && gcode == G_STRANGE) {
duke@435:            perror("libsaproc DEBUG: ");
duke@435:         }
duke@435:         if (isProcess) {
duke@435:            THROW_NEW_DEBUGGER_EXCEPTION("Not able to attach to process!");
duke@435:         } else {
duke@435:            THROW_NEW_DEBUGGER_EXCEPTION("Not able to attach to core file!");
duke@435:         }
duke@435:      }
duke@435:   }
duke@435: 
duke@435:   // even though libproc.so supports 64 bit debugger and 32 bit debuggee, we don't
duke@435:   // support such cross-bit-debugging. check for that combination and throw error.
duke@435: #ifdef _LP64
duke@435:   int data_model;
duke@435:   if (ps_pdmodel(ph, &data_model) != PS_OK) {
duke@435:      Prelease(ph, PRELEASE_CLEAR);
duke@435:      THROW_NEW_DEBUGGER_EXCEPTION("can't determine debuggee data model (ILP32? or LP64?)");
duke@435:   }
duke@435:   if (data_model == PR_MODEL_ILP32) {
duke@435:      Prelease(ph, PRELEASE_CLEAR);
duke@435:      THROW_NEW_DEBUGGER_EXCEPTION("debuggee is 32 bit, use 32 bit java for debugger");
duke@435:   }
duke@435: #endif
duke@435: 
duke@435:   env->SetLongField(this_obj, p_ps_prochandle_ID, (jlong)(uintptr_t)ph);
duke@435: 
duke@435:   Debugger dbg;
duke@435:   dbg.env = env;
duke@435:   dbg.this_obj = this_obj;
duke@435:   jthrowable exception = 0;
duke@435:   if (! isProcess) {
duke@435:     /*
duke@435:      * With class sharing, shared perm. gen heap is allocated in with MAP_SHARED|PROT_READ.
duke@435:      * These pages are mapped from the file "classes[_g].jsa". MAP_SHARED pages are not dumped
duke@435:      * in Solaris core.To read shared heap pages, we have to read classes[_g].jsa file.
duke@435:      */
duke@435:     Pobject_iter(ph, init_classsharing_workaround, &dbg);
duke@435:     exception = env->ExceptionOccurred();
duke@435:     if (exception) {
duke@435:       env->ExceptionClear();
duke@435:       detach_internal(env, this_obj);
duke@435:       env->Throw(exception);
duke@435:       return;
duke@435:     }
duke@435:   }
duke@435: 
duke@435:   /*
duke@435:    * Iterate over the process mappings looking
duke@435:    * for libthread and then dlopen the appropriate
duke@435:    * libthread_db and get function pointers.
duke@435:    */
duke@435:   Pobject_iter(ph, init_libthread_db_ptrs, &dbg);
duke@435:   exception = env->ExceptionOccurred();
duke@435:   if (exception) {
duke@435:     env->ExceptionClear();
duke@435:     if (!sa_ignore_threaddb) {
duke@435:       detach_internal(env, this_obj);
duke@435:       env->Throw(exception);
duke@435:     }
duke@435:     return;
duke@435:   }
duke@435: 
duke@435:   // init libthread_db and create thread_db agent
duke@435:   p_td_init_t p_td_init = (p_td_init_t) env->GetLongField(this_obj, p_td_init_ID);
duke@435:   if (p_td_init == 0) {
duke@435:     if (!sa_ignore_threaddb) {
duke@435:       detach_internal(env, this_obj);
duke@435:     }
duke@435:     HANDLE_THREADDB_FAILURE("Did not find libthread in target process/core!");
duke@435:   }
duke@435: 
duke@435:   if (p_td_init() != TD_OK) {
duke@435:     if (!sa_ignore_threaddb) {
duke@435:       detach_internal(env, this_obj);
duke@435:     }
duke@435:     HANDLE_THREADDB_FAILURE("Can't initialize thread_db!");
duke@435:   }
duke@435: 
duke@435:   p_td_ta_new_t p_td_ta_new = (p_td_ta_new_t) env->GetLongField(this_obj, p_td_ta_new_ID);
duke@435: 
duke@435:   td_thragent_t *p_td_thragent_t = 0;
duke@435:   if (p_td_ta_new(ph, &p_td_thragent_t) != TD_OK) {
duke@435:     if (!sa_ignore_threaddb) {
duke@435:       detach_internal(env, this_obj);
duke@435:     }
duke@435:     HANDLE_THREADDB_FAILURE("Can't create thread_db agent!");
duke@435:   }
duke@435:   env->SetLongField(this_obj, p_td_thragent_t_ID, (jlong)(uintptr_t) p_td_thragent_t);
duke@435: 
duke@435: }
duke@435: 
duke@435: /*
duke@435:  * Class:     sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
duke@435:  * Method:    attach0
duke@435:  * Signature: (Ljava/lang/String;)V
duke@435:  * Description: process detach
duke@435:  */
duke@435: JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_attach0__Ljava_lang_String_2
duke@435:   (JNIEnv *env, jobject this_obj, jstring pid) {
duke@435:   attach_internal(env, this_obj, pid, JNI_TRUE);
duke@435: }
duke@435: 
duke@435: /*
duke@435:  * Class:     sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
duke@435:  * Method:    attach0
duke@435:  * Signature: (Ljava/lang/String;Ljava/lang/String;)V
duke@435:  * Description: core file detach
duke@435:  */
duke@435: JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_attach0__Ljava_lang_String_2Ljava_lang_String_2
duke@435:   (JNIEnv *env, jobject this_obj, jstring executable, jstring corefile) {
duke@435:   // ignore executable file name, libproc.so can detect a.out name anyway.
duke@435:   attach_internal(env, this_obj, corefile, JNI_FALSE);
duke@435: }
duke@435: 
duke@435: 
duke@435: /*
duke@435:  * Class:       sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
duke@435:  * Method:      detach0
duke@435:  * Signature:   ()V
duke@435:  * Description: process/core file detach
duke@435:  */
duke@435: JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_detach0
duke@435:   (JNIEnv *env, jobject this_obj) {
duke@435:   detach_internal(env, this_obj);
duke@435: }
duke@435: 
duke@435: /*
duke@435:  * Class:       sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
duke@435:  * Method:      getRemoteProcessAddressSize0
duke@435:  * Signature:   ()I
duke@435:  * Description: get process/core address size
duke@435:  */
duke@435: JNIEXPORT jint JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_getRemoteProcessAddressSize0
duke@435:   (JNIEnv *env, jobject this_obj) {
duke@435:   jlong p_ps_prochandle;
duke@435:   p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
duke@435:   int data_model = PR_MODEL_ILP32;
duke@435:   ps_pdmodel((struct ps_prochandle*) p_ps_prochandle, &data_model);
duke@435:   print_debug("debuggee is %d bit\n", data_model == PR_MODEL_ILP32? 32 : 64);
duke@435:   return (jint) data_model == PR_MODEL_ILP32? 32 : 64;
duke@435: }
duke@435: 
duke@435: /*
duke@435:  * Class:       sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
duke@435:  * Method:      getPageSize0
duke@435:  * Signature:   ()I
duke@435:  * Description: get process/core page size
duke@435:  */
duke@435: JNIEXPORT jint JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_getPageSize0
duke@435:   (JNIEnv *env, jobject this_obj) {
duke@435: 
duke@435: /*
duke@435:   We are not yet attached to a java process or core file. getPageSize is called from
duke@435:   the constructor of ProcDebuggerLocal. The following won't work!
duke@435: 
duke@435:     jlong p_ps_prochandle;
duke@435:     p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
duke@435:     CHECK_EXCEPTION_(-1);
duke@435:     struct ps_prochandle* prochandle = (struct ps_prochandle*) p_ps_prochandle;
duke@435:     return (Pstate(prochandle) == PS_DEAD) ? Pgetauxval(prochandle, AT_PAGESZ)
duke@435:                                            : getpagesize();
duke@435: 
duke@435:   So even though core may have been generated with a different page size settings, for now
duke@435:   call getpagesize.
duke@435: */
duke@435: 
duke@435:   return getpagesize();
duke@435: }
duke@435: 
duke@435: /*
duke@435:  * Class:       sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
duke@435:  * Method:      getThreadIntegerRegisterSet0
duke@435:  * Signature:   (J)[J
duke@435:  * Description: get gregset for a given thread specified by thread id
duke@435:  */
duke@435: JNIEXPORT jlongArray JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_getThreadIntegerRegisterSet0
duke@435:   (JNIEnv *env, jobject this_obj, jlong tid) {
duke@435:   // map the thread id to thread handle
duke@435:   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);
duke@435: 
duke@435:   td_thragent_t* p_td_thragent_t = (td_thragent_t*) env->GetLongField(this_obj, p_td_thragent_t_ID);
duke@435:   if (p_td_thragent_t == 0) {
duke@435:      return 0;
duke@435:   }
duke@435: 
duke@435:   td_thrhandle_t thr_handle;
duke@435:   if (p_td_ta_map_id2thr(p_td_thragent_t, (thread_t) tid, &thr_handle) != TD_OK) {
duke@435:      THROW_NEW_DEBUGGER_EXCEPTION_("can't map thread id to thread handle!", 0);
duke@435:   }
duke@435: 
duke@435:   p_td_thr_getgregs_t p_td_thr_getgregs = (p_td_thr_getgregs_t) env->GetLongField(this_obj, p_td_thr_getgregs_ID);
duke@435:   prgregset_t gregs;
duke@435:   p_td_thr_getgregs(&thr_handle, gregs);
duke@435: 
duke@435:   jlongArray res = env->NewLongArray(NPRGREG);
duke@435:   CHECK_EXCEPTION_(0);
duke@435:   jboolean isCopy;
duke@435:   jlong* ptr = env->GetLongArrayElements(res, &isCopy);
duke@435:   for (int i = 0; i < NPRGREG; i++) {
duke@435:     ptr[i] = (jlong) (uintptr_t) gregs[i];
duke@435:   }
duke@435:   env->ReleaseLongArrayElements(res, ptr, JNI_COMMIT);
duke@435:   return res;
duke@435: }
duke@435: 
duke@435: /*
duke@435:  * Class:       sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
duke@435:  * Method:      fillThreadList0
duke@435:  * Signature:   (Ljava/util/List;)V
duke@435:  * Description: fills thread list of the debuggee process/core
duke@435:  */
duke@435: JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_fillThreadList0
duke@435:   (JNIEnv *env, jobject this_obj, jobject list) {
duke@435: 
duke@435:   td_thragent_t* p_td_thragent_t = (td_thragent_t*) env->GetLongField(this_obj, p_td_thragent_t_ID);
duke@435:   if (p_td_thragent_t == 0) {
duke@435:      return;
duke@435:   }
duke@435: 
duke@435:   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);
duke@435: 
duke@435:   DebuggerWithObject dbgo;
duke@435:   dbgo.env = env;
duke@435:   dbgo.this_obj = this_obj;
duke@435:   dbgo.obj = list;
duke@435: 
duke@435:   p_td_ta_thr_iter(p_td_thragent_t, fill_thread_list, &dbgo,
duke@435:                    TD_THR_ANY_STATE, TD_THR_LOWEST_PRIORITY, TD_SIGNO_MASK, TD_THR_ANY_USER_FLAGS);
duke@435: }
duke@435: 
duke@435: /*
duke@435:  * Class:       sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
duke@435:  * Method:      fillCFrameList0
duke@435:  * Signature:   ([J)Lsun/jvm/hotspot/debugger/proc/ProcCFrame;
duke@435:  * Description: fills CFrame list for a given thread
duke@435:  */
duke@435: JNIEXPORT jobject JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_fillCFrameList0
duke@435:   (JNIEnv *env, jobject this_obj, jlongArray regsArray) {
duke@435:   jlong p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
duke@435: 
duke@435:   DebuggerWith2Objects dbgo2;
duke@435:   dbgo2.env  = env;
duke@435:   dbgo2.this_obj = this_obj;
duke@435:   dbgo2.obj  = NULL;
duke@435:   dbgo2.obj2 = NULL;
duke@435: 
duke@435:   jboolean isCopy;
duke@435:   jlong* ptr = env->GetLongArrayElements(regsArray, &isCopy);
duke@435:   CHECK_EXCEPTION_(0);
duke@435: 
duke@435:   prgregset_t gregs;
duke@435:   for (int i = 0; i < NPRGREG; i++) {
duke@435:      gregs[i] = (uintptr_t) ptr[i];
duke@435:   }
duke@435: 
duke@435:   env->ReleaseLongArrayElements(regsArray, ptr, JNI_ABORT);
duke@435:   CHECK_EXCEPTION_(0);
duke@435:   Pstack_iter((struct ps_prochandle*) p_ps_prochandle, gregs, fill_cframe_list, &dbgo2);
duke@435:   return dbgo2.obj;
duke@435: }
duke@435: 
duke@435: /*
duke@435:  * Class:       sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
duke@435:  * Method:      fillLoadObjectList0
duke@435:  * Signature:   (Ljava/util/List;)V
duke@435:  * Description: fills shared objects of the debuggee process/core
duke@435:  */
duke@435: JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_fillLoadObjectList0
duke@435:   (JNIEnv *env, jobject this_obj, jobject list) {
duke@435:   DebuggerWithObject dbgo;
duke@435:   dbgo.env = env;
duke@435:   dbgo.this_obj = this_obj;
duke@435:   dbgo.obj = list;
duke@435: 
duke@435:   jlong p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
duke@435:   Pobject_iter((struct ps_prochandle*) p_ps_prochandle, fill_load_object_list, &dbgo);
duke@435: }
duke@435: 
duke@435: /*
duke@435:  * Class:       sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
duke@435:  * Method:      readBytesFromProcess0
duke@435:  * Signature:   (JJ)[B
duke@435:  * Description: read bytes from debuggee process/core
duke@435:  */
duke@435: JNIEXPORT jbyteArray JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_readBytesFromProcess0
duke@435:   (JNIEnv *env, jobject this_obj, jlong address, jlong numBytes) {
duke@435: 
duke@435:   jbyteArray array = env->NewByteArray(numBytes);
duke@435:   CHECK_EXCEPTION_(0);
duke@435:   jboolean isCopy;
duke@435:   jbyte* bufPtr = env->GetByteArrayElements(array, &isCopy);
duke@435:   CHECK_EXCEPTION_(0);
duke@435: 
duke@435:   jlong p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
duke@435:   ps_err_e ret = ps_pread((struct ps_prochandle*) p_ps_prochandle,
duke@435:                        (psaddr_t)address, bufPtr, (size_t)numBytes);
duke@435: 
duke@435:   if (ret != PS_OK) {
duke@435:     // part of the class sharing workaround. try shared heap area
duke@435:     int classes_jsa_fd = env->GetIntField(this_obj, classes_jsa_fd_ID);
duke@435:     if (classes_jsa_fd != -1 && address != (jlong)0) {
duke@435:       print_debug("read failed at 0x%lx, attempting shared heap area\n", (long) address);
duke@435: 
duke@435:       struct FileMapHeader* pheader = (struct FileMapHeader*) env->GetLongField(this_obj, p_file_map_header_ID);
duke@435:       // walk through the shared mappings -- we just have 4 of them.
duke@435:       // so, linear walking is okay.
duke@435:       for (int m = 0; m < NUM_SHARED_MAPS; m++) {
duke@435: 
duke@435:         // We can skip the non-read-only maps. These are mapped as MAP_PRIVATE
duke@435:         // and hence will be read by libproc. Besides, the file copy may be
duke@435:         // stale because the process might have modified those pages.
duke@435:         if (pheader->_space[m]._read_only) {
duke@435:           jlong baseAddress = (jlong) (uintptr_t) pheader->_space[m]._base;
duke@435:           size_t usedSize = pheader->_space[m]._used;
duke@435:           if (address >= baseAddress && address < (baseAddress + usedSize)) {
duke@435:             // the given address falls in this shared heap area
duke@435:             print_debug("found shared map at 0x%lx\n", (long) baseAddress);
duke@435: 
duke@435: 
duke@435:             // If more data is asked than actually mapped from file, we need to zero fill
duke@435:             // till the end-of-page boundary. But, java array new does that for us. we just
duke@435:             // need to read as much as data available.
duke@435: 
duke@435: #define MIN2(x, y) (((x) < (y))? (x) : (y))
duke@435: 
duke@435:             jlong diff = address - baseAddress;
duke@435:             jlong bytesToRead = MIN2(numBytes, usedSize - diff);
duke@435:             off_t offset = pheader->_space[m]._file_offset  + off_t(diff);
duke@435:             ssize_t bytesRead = pread(classes_jsa_fd, bufPtr, bytesToRead, offset);
duke@435:             if (bytesRead != bytesToRead) {
duke@435:               env->ReleaseByteArrayElements(array, bufPtr, JNI_ABORT);
duke@435:               print_debug("shared map read failed\n");
duke@435:               return jbyteArray(0);
duke@435:             } else {
duke@435:               print_debug("shared map read succeeded\n");
duke@435:               env->ReleaseByteArrayElements(array, bufPtr, 0);
duke@435:               return array;
duke@435:             }
duke@435:           } // is in current map
duke@435:         } // is read only map
duke@435:       } // for shared maps
duke@435:     } // classes_jsa_fd != -1
duke@435:     env->ReleaseByteArrayElements(array, bufPtr, JNI_ABORT);
duke@435:     return jbyteArray(0);
duke@435:   } else {
duke@435:     env->ReleaseByteArrayElements(array, bufPtr, 0);
duke@435:     return array;
duke@435:   }
duke@435: }
duke@435: 
duke@435: /*
duke@435:  * Class:       sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
duke@435:  * Method:      writeBytesToProcess0
duke@435:  * Signature:   (JJ[B)V
duke@435:  * Description: write bytes into debugger process
duke@435:  */
duke@435: JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_writeBytesToProcess0
duke@435:   (JNIEnv *env, jobject this_obj, jlong address, jlong numBytes, jbyteArray data) {
duke@435:   jlong p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
duke@435:   jboolean isCopy;
duke@435:   jbyte* ptr = env->GetByteArrayElements(data, &isCopy);
duke@435:   CHECK_EXCEPTION;
duke@435: 
duke@435:   if (ps_pwrite((struct ps_prochandle*) p_ps_prochandle, address, ptr, numBytes) != PS_OK) {
duke@435:      env->ReleaseByteArrayElements(data, ptr, JNI_ABORT);
duke@435:      THROW_NEW_DEBUGGER_EXCEPTION("Process write failed!");
duke@435:   }
duke@435: 
duke@435:   env->ReleaseByteArrayElements(data, ptr, JNI_ABORT);
duke@435: }
duke@435: 
duke@435: /*
duke@435:  * Class:     sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
duke@435:  * Method:    suspend0
duke@435:  * Signature: ()V
duke@435:  */
duke@435: JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_suspend0
duke@435:   (JNIEnv *env, jobject this_obj) {
duke@435:   jlong p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
duke@435:   // for now don't check return value. revisit this again.
duke@435:   Pstop((struct ps_prochandle*) p_ps_prochandle, 1000);
duke@435: }
duke@435: 
duke@435: /*
duke@435:  * Class:     sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
duke@435:  * Method:    resume0
duke@435:  * Signature: ()V
duke@435:  */
duke@435: JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_resume0
duke@435:   (JNIEnv *env, jobject this_obj) {
duke@435:   jlong p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
duke@435:   // for now don't check return value. revisit this again.
duke@435:   Psetrun((struct ps_prochandle*) p_ps_prochandle, 0, PRCFAULT|PRSTOP);
duke@435: }
duke@435: 
duke@435: /*
duke@435:   * Class:       sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
duke@435:   * Method:      lookupByName0
duke@435:   * Signature:   (Ljava/lang/String;Ljava/lang/String;)J
duke@435:   * Description: symbol lookup by name
duke@435: */
duke@435: JNIEXPORT jlong JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_lookupByName0
duke@435:    (JNIEnv *env, jobject this_obj, jstring objectName, jstring symbolName) {
duke@435:    jlong p_ps_prochandle;
duke@435:    p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
duke@435: 
duke@435:    jboolean isCopy;
duke@435:    const char* objectName_cstr = NULL;
duke@435:    if (objectName != NULL) {
duke@435:      objectName_cstr = env->GetStringUTFChars(objectName, &isCopy);
duke@435:      CHECK_EXCEPTION_(0);
duke@435:    } else {
duke@435:      objectName_cstr = PR_OBJ_EVERY;
duke@435:    }
duke@435: 
duke@435:    const char* symbolName_cstr = env->GetStringUTFChars(symbolName, &isCopy);
duke@435:    CHECK_EXCEPTION_(0);
duke@435: 
duke@435:    psaddr_t symbol_addr = (psaddr_t) 0;
duke@435:    ps_pglobal_lookup((struct ps_prochandle*) p_ps_prochandle,  objectName_cstr,
duke@435:                     symbolName_cstr, &symbol_addr);
duke@435: 
duke@435:    if (symbol_addr == 0) {
duke@435:       print_debug("lookup for %s in %s failed\n", symbolName_cstr, objectName_cstr);
duke@435:    }
duke@435: 
duke@435:    if (objectName_cstr != PR_OBJ_EVERY) {
duke@435:      env->ReleaseStringUTFChars(objectName, objectName_cstr);
duke@435:    }
duke@435:    env->ReleaseStringUTFChars(symbolName, symbolName_cstr);
duke@435:    return (jlong) (uintptr_t) symbol_addr;
duke@435: }
duke@435: 
duke@435: /*
duke@435:  * Class:       sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
duke@435:  * Method:      lookupByAddress0
duke@435:  * Signature:   (J)Lsun/jvm/hotspot/debugger/cdbg/ClosestSymbol;
duke@435:  * Description: lookup symbol name for a given address
duke@435:  */
duke@435: JNIEXPORT jobject JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_lookupByAddress0
duke@435:    (JNIEnv *env, jobject this_obj, jlong address) {
duke@435:    jlong p_ps_prochandle;
duke@435:    p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
duke@435: 
duke@435:    char nameBuf[SYMBOL_BUF_SIZE + 1];
duke@435:    GElf_Sym sym;
duke@435:    int res = Plookup_by_addr((struct ps_prochandle*) p_ps_prochandle, (uintptr_t) address,
duke@435:                                  nameBuf, sizeof(nameBuf), &sym);
duke@435:    if (res != 0) { // failed
duke@435:       return 0;
duke@435:    }
duke@435: 
duke@435:    jstring resSym = env->NewStringUTF(nameBuf);
duke@435:    CHECK_EXCEPTION_(0);
duke@435: 
duke@435:    return env->CallObjectMethod(this_obj, createClosestSymbol_ID, resSym, (address - sym.st_value));
duke@435: }
duke@435: 
duke@435: /*
duke@435:  * Class:     sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
duke@435:  * Method:    demangle0
duke@435:  * Signature: (Ljava/lang/String;)Ljava/lang/String;
duke@435:  */
duke@435: JNIEXPORT jstring JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_demangle0
duke@435:   (JNIEnv *env, jobject this_object, jstring name) {
duke@435:   jboolean isCopy;
duke@435:   const char* ptr = env->GetStringUTFChars(name, &isCopy);
duke@435:   char  buf[2*SYMBOL_BUF_SIZE + 1];
duke@435:   jstring res = 0;
duke@435:   if (cplus_demangle((char*) ptr, buf, sizeof(buf)) != DEMANGLE_ESPACE) {
duke@435:     res = env->NewStringUTF(buf);
duke@435:   } else {
duke@435:     res = name;
duke@435:   }
duke@435:   env->ReleaseStringUTFChars(name, ptr);
duke@435:   return res;
duke@435: }
duke@435: 
duke@435: typedef int (*find_file_hook_t)(const char *, int elf_checksum);
duke@435: 
duke@435: /*
duke@435:  * Class:       sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
duke@435:  * Method:      initIDs
duke@435:  * Signature:   ()V
duke@435:  * Description: get JNI ids for fields and methods of ProcDebuggerLocal class
duke@435:  */
duke@435: JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_initIDs
duke@435:   (JNIEnv *env, jclass clazz) {
duke@435:   _libsaproc_debug = getenv("LIBSAPROC_DEBUG") != NULL;
duke@435:   if (_libsaproc_debug) {
duke@435:      // propagate debug mode to libproc.so
duke@435:      static const char* var = "LIBPROC_DEBUG=1";
duke@435:      putenv((char*)var);
duke@435:   }
duke@435: 
duke@435:   void* libproc_handle = dlopen("libproc.so", RTLD_LAZY | RTLD_GLOBAL);
duke@435:   if (libproc_handle == 0)
duke@435:      THROW_NEW_DEBUGGER_EXCEPTION("can't load libproc.so, if you are using Solaris 5.7 or below, copy libproc.so from 5.8!");
duke@435: 
duke@435:   // If possible, set shared object find file hook.
duke@435:   void (*set_hook)(find_file_hook_t) = (void(*)(find_file_hook_t))dlsym(libproc_handle, "Pset_find_file_hook");
duke@435:   if (set_hook) {
duke@435:     // we found find file hook symbol, set up our hook function.
duke@435:     set_hook(find_file_hook);
duke@435:   } else if (getenv(SA_ALTROOT)) {
duke@435:     printf("libsaproc WARNING: %s set, but can't set file hook. " \
duke@435:            "Did you use right version of libproc.so?\n", SA_ALTROOT);
duke@435:   }
duke@435: 
duke@435:   p_ps_prochandle_ID = env->GetFieldID(clazz, "p_ps_prochandle", "J");
duke@435:   CHECK_EXCEPTION;
duke@435: 
duke@435:   libthread_db_handle_ID = env->GetFieldID(clazz, "libthread_db_handle", "J");
duke@435:   CHECK_EXCEPTION;
duke@435: 
duke@435:   p_td_thragent_t_ID = env->GetFieldID(clazz, "p_td_thragent_t", "J");
duke@435:   CHECK_EXCEPTION;
duke@435: 
duke@435:   p_td_init_ID = env->GetFieldID(clazz, "p_td_init", "J");
duke@435:   CHECK_EXCEPTION;
duke@435: 
duke@435:   p_td_ta_new_ID = env->GetFieldID(clazz, "p_td_ta_new", "J");
duke@435:   CHECK_EXCEPTION;
duke@435: 
duke@435:   p_td_ta_delete_ID = env->GetFieldID(clazz, "p_td_ta_delete", "J");
duke@435:   CHECK_EXCEPTION;
duke@435: 
duke@435:   p_td_ta_thr_iter_ID = env->GetFieldID(clazz, "p_td_ta_thr_iter", "J");
duke@435:   CHECK_EXCEPTION;
duke@435: 
duke@435:   p_td_thr_get_info_ID = env->GetFieldID(clazz, "p_td_thr_get_info", "J");
duke@435:   CHECK_EXCEPTION;
duke@435: 
duke@435:   p_td_ta_map_id2thr_ID = env->GetFieldID(clazz, "p_td_ta_map_id2thr", "J");
duke@435:   CHECK_EXCEPTION;
duke@435: 
duke@435:   p_td_thr_getgregs_ID = env->GetFieldID(clazz, "p_td_thr_getgregs", "J");
duke@435:   CHECK_EXCEPTION;
duke@435: 
duke@435:   getThreadForThreadId_ID = env->GetMethodID(clazz,
duke@435:                             "getThreadForThreadId", "(J)Lsun/jvm/hotspot/debugger/ThreadProxy;");
duke@435:   CHECK_EXCEPTION;
duke@435: 
duke@435:   pcRegIndex_ID = env->GetFieldID(clazz, "pcRegIndex", "I");
duke@435:   CHECK_EXCEPTION;
duke@435: 
duke@435:   fpRegIndex_ID = env->GetFieldID(clazz, "fpRegIndex", "I");
duke@435:   CHECK_EXCEPTION;
duke@435: 
duke@435:   createSenderFrame_ID = env->GetMethodID(clazz,
duke@435:                             "createSenderFrame", "(Lsun/jvm/hotspot/debugger/proc/ProcCFrame;JJ)Lsun/jvm/hotspot/debugger/proc/ProcCFrame;");
duke@435:   CHECK_EXCEPTION;
duke@435: 
duke@435:   createLoadObject_ID = env->GetMethodID(clazz,
duke@435:                             "createLoadObject", "(Ljava/lang/String;JJ)Lsun/jvm/hotspot/debugger/cdbg/LoadObject;");
duke@435:   CHECK_EXCEPTION;
duke@435: 
duke@435:   createClosestSymbol_ID = env->GetMethodID(clazz,
duke@435:                             "createClosestSymbol", "(Ljava/lang/String;J)Lsun/jvm/hotspot/debugger/cdbg/ClosestSymbol;");
duke@435:   CHECK_EXCEPTION;
duke@435: 
duke@435:   listAdd_ID = env->GetMethodID(env->FindClass("java/util/List"), "add", "(Ljava/lang/Object;)Z");
duke@435:   CHECK_EXCEPTION;
duke@435: 
duke@435:   // part of the class sharing workaround
duke@435:   classes_jsa_fd_ID = env->GetFieldID(clazz, "classes_jsa_fd", "I");
duke@435:   CHECK_EXCEPTION;
duke@435:   p_file_map_header_ID = env->GetFieldID(clazz, "p_file_map_header", "J");
duke@435:   CHECK_EXCEPTION;
duke@435: }