backtrace.c revision f0c5872637a63e28e3cd314cfc915c07f76df9c6
1501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown/* 2501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown * Copyright (C) 2011 The Android Open Source Project 3501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown * 4501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown * Licensed under the Apache License, Version 2.0 (the "License"); 5501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown * you may not use this file except in compliance with the License. 6501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown * You may obtain a copy of the License at 7501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown * 8501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown * http://www.apache.org/licenses/LICENSE-2.0 9501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown * 10501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown * Unless required by applicable law or agreed to in writing, software 11501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown * distributed under the License is distributed on an "AS IS" BASIS, 12501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown * See the License for the specific language governing permissions and 14501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown * limitations under the License. 15501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown */ 16501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown 17501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown#define LOG_TAG "Corkscrew" 18501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown//#define LOG_NDEBUG 0 19501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown 20501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown#include "backtrace-arch.h" 21501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown#include "backtrace-helper.h" 22501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown#include "ptrace-arch.h" 23501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown#include <corkscrew/map_info.h> 24501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown#include <corkscrew/symbol_table.h> 25501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown#include <corkscrew/ptrace.h> 26501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown#include <corkscrew/demangle.h> 27501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown 28501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown#include <unistd.h> 29501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown#include <signal.h> 30501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown#include <pthread.h> 31501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown#include <unwind.h> 32501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown#include <sys/exec_elf.h> 33501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown#include <cutils/log.h> 34f0c5872637a63e28e3cd314cfc915c07f76df9c6Jeff Brown#include <cutils/atomic.h> 35501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown 36501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown#if HAVE_DLADDR 37501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown#include <dlfcn.h> 38501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown#endif 39501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown 40501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Browntypedef struct { 41501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown backtrace_frame_t* backtrace; 42501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown size_t ignore_depth; 43501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown size_t max_depth; 44501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown size_t ignored_frames; 45501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown size_t returned_frames; 46f0c5872637a63e28e3cd314cfc915c07f76df9c6Jeff Brown memory_t memory; 47501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown} backtrace_state_t; 48501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown 49501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brownstatic _Unwind_Reason_Code unwind_backtrace_callback(struct _Unwind_Context* context, void* arg) { 50501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown backtrace_state_t* state = (backtrace_state_t*)arg; 51501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown uintptr_t pc = _Unwind_GetIP(context); 52501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown if (pc) { 53501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown // TODO: Get information about the stack layout from the _Unwind_Context. 54501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown // This will require a new architecture-specific function to query 55501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown // the appropriate registers. Current callers of unwind_backtrace 56501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown // don't need this information, so we won't bother collecting it just yet. 57f0c5872637a63e28e3cd314cfc915c07f76df9c6Jeff Brown add_backtrace_entry(rewind_pc_arch(&state->memory, pc), state->backtrace, 58501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown state->ignore_depth, state->max_depth, 59501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown &state->ignored_frames, &state->returned_frames); 60501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown } 61501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown return state->returned_frames < state->max_depth ? _URC_NO_REASON : _URC_END_OF_STACK; 62501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown} 63501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown 64501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brownssize_t unwind_backtrace(backtrace_frame_t* backtrace, size_t ignore_depth, size_t max_depth) { 65f0c5872637a63e28e3cd314cfc915c07f76df9c6Jeff Brown ALOGV("Unwinding current thread %d.", gettid()); 66f0c5872637a63e28e3cd314cfc915c07f76df9c6Jeff Brown 67f0c5872637a63e28e3cd314cfc915c07f76df9c6Jeff Brown map_info_t* milist = acquire_my_map_info_list(); 68f0c5872637a63e28e3cd314cfc915c07f76df9c6Jeff Brown 69501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown backtrace_state_t state; 70501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown state.backtrace = backtrace; 71501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown state.ignore_depth = ignore_depth; 72501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown state.max_depth = max_depth; 73501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown state.ignored_frames = 0; 74501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown state.returned_frames = 0; 75f0c5872637a63e28e3cd314cfc915c07f76df9c6Jeff Brown init_memory(&state.memory, milist); 76501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown 77501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown _Unwind_Reason_Code rc =_Unwind_Backtrace(unwind_backtrace_callback, &state); 78f0c5872637a63e28e3cd314cfc915c07f76df9c6Jeff Brown 79f0c5872637a63e28e3cd314cfc915c07f76df9c6Jeff Brown release_my_map_info_list(milist); 80f0c5872637a63e28e3cd314cfc915c07f76df9c6Jeff Brown 81501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown if (state.returned_frames) { 82501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown return state.returned_frames; 83501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown } 84501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown return rc == _URC_END_OF_STACK ? 0 : -1; 85501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown} 86501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown 87501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown#ifdef CORKSCREW_HAVE_ARCH 88501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brownstatic pthread_mutex_t g_unwind_signal_mutex = PTHREAD_MUTEX_INITIALIZER; 89501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brownstatic volatile struct { 90f0c5872637a63e28e3cd314cfc915c07f76df9c6Jeff Brown int32_t tid; 91f0c5872637a63e28e3cd314cfc915c07f76df9c6Jeff Brown const map_info_t* map_info_list; 92501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown backtrace_frame_t* backtrace; 93501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown size_t ignore_depth; 94501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown size_t max_depth; 95501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown size_t returned_frames; 96501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown} g_unwind_signal_state; 97501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown 98501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brownstatic void unwind_backtrace_thread_signal_handler(int n, siginfo_t* siginfo, void* sigcontext) { 99f0c5872637a63e28e3cd314cfc915c07f76df9c6Jeff Brown int32_t tid = android_atomic_acquire_load(&g_unwind_signal_state.tid); 100f0c5872637a63e28e3cd314cfc915c07f76df9c6Jeff Brown if (tid == gettid()) { 101501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown g_unwind_signal_state.returned_frames = unwind_backtrace_signal_arch( 102f0c5872637a63e28e3cd314cfc915c07f76df9c6Jeff Brown siginfo, sigcontext, 103f0c5872637a63e28e3cd314cfc915c07f76df9c6Jeff Brown g_unwind_signal_state.map_info_list, 104f0c5872637a63e28e3cd314cfc915c07f76df9c6Jeff Brown g_unwind_signal_state.backtrace, 105501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown g_unwind_signal_state.ignore_depth, 106501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown g_unwind_signal_state.max_depth); 107f0c5872637a63e28e3cd314cfc915c07f76df9c6Jeff Brown android_atomic_release_store(-1, &g_unwind_signal_state.tid); 108f0c5872637a63e28e3cd314cfc915c07f76df9c6Jeff Brown } else { 109f0c5872637a63e28e3cd314cfc915c07f76df9c6Jeff Brown ALOGV("Received spurious SIGURG on thread %d that was intended for thread %d.", 110f0c5872637a63e28e3cd314cfc915c07f76df9c6Jeff Brown gettid(), tid); 111501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown } 112501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown} 113501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown#endif 114501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown 115501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brownssize_t unwind_backtrace_thread(pid_t tid, backtrace_frame_t* backtrace, 116501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown size_t ignore_depth, size_t max_depth) { 117f0c5872637a63e28e3cd314cfc915c07f76df9c6Jeff Brown if (tid == gettid()) { 118f0c5872637a63e28e3cd314cfc915c07f76df9c6Jeff Brown return unwind_backtrace(backtrace, ignore_depth + 1, max_depth); 119f0c5872637a63e28e3cd314cfc915c07f76df9c6Jeff Brown } 120f0c5872637a63e28e3cd314cfc915c07f76df9c6Jeff Brown 121f0c5872637a63e28e3cd314cfc915c07f76df9c6Jeff Brown ALOGV("Unwinding thread %d from thread %d.", tid, gettid()); 122f0c5872637a63e28e3cd314cfc915c07f76df9c6Jeff Brown 123501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown#ifdef CORKSCREW_HAVE_ARCH 124501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown struct sigaction act; 125501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown struct sigaction oact; 126501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown memset(&act, 0, sizeof(act)); 127501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown act.sa_sigaction = unwind_backtrace_thread_signal_handler; 128501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown act.sa_flags = SA_RESTART | SA_SIGINFO; 129501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown sigemptyset(&act.sa_mask); 130501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown 131501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown pthread_mutex_lock(&g_unwind_signal_mutex); 132f0c5872637a63e28e3cd314cfc915c07f76df9c6Jeff Brown map_info_t* milist = acquire_my_map_info_list(); 133501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown 134501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown ssize_t frames = -1; 135501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown if (!sigaction(SIGURG, &act, &oact)) { 136f0c5872637a63e28e3cd314cfc915c07f76df9c6Jeff Brown g_unwind_signal_state.map_info_list = milist; 137f0c5872637a63e28e3cd314cfc915c07f76df9c6Jeff Brown g_unwind_signal_state.backtrace = backtrace; 138f0c5872637a63e28e3cd314cfc915c07f76df9c6Jeff Brown g_unwind_signal_state.ignore_depth = ignore_depth; 139f0c5872637a63e28e3cd314cfc915c07f76df9c6Jeff Brown g_unwind_signal_state.max_depth = max_depth; 140f0c5872637a63e28e3cd314cfc915c07f76df9c6Jeff Brown g_unwind_signal_state.returned_frames = 0; 141f0c5872637a63e28e3cd314cfc915c07f76df9c6Jeff Brown android_atomic_release_store(tid, &g_unwind_signal_state.tid); 142f0c5872637a63e28e3cd314cfc915c07f76df9c6Jeff Brown 143f0c5872637a63e28e3cd314cfc915c07f76df9c6Jeff Brown if (kill(tid, SIGURG)) { 144f0c5872637a63e28e3cd314cfc915c07f76df9c6Jeff Brown ALOGV("Failed to send SIGURG to thread %d.", tid); 145f0c5872637a63e28e3cd314cfc915c07f76df9c6Jeff Brown android_atomic_release_store(-1, &g_unwind_signal_state.tid); 146f0c5872637a63e28e3cd314cfc915c07f76df9c6Jeff Brown } else { 147f0c5872637a63e28e3cd314cfc915c07f76df9c6Jeff Brown while (android_atomic_acquire_load(&g_unwind_signal_state.tid) == tid) { 148f0c5872637a63e28e3cd314cfc915c07f76df9c6Jeff Brown ALOGV("Waiting for response from thread %d...", tid); 149501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown usleep(1000); 150501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown } 151501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown frames = g_unwind_signal_state.returned_frames; 152501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown } 153f0c5872637a63e28e3cd314cfc915c07f76df9c6Jeff Brown 154501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown sigaction(SIGURG, &oact, NULL); 155501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown } 156501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown 157f0c5872637a63e28e3cd314cfc915c07f76df9c6Jeff Brown release_my_map_info_list(milist); 158501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown pthread_mutex_unlock(&g_unwind_signal_mutex); 159501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown return frames; 160501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown#else 161501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown return -1; 162501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown#endif 163501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown} 164501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown 165501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brownssize_t unwind_backtrace_ptrace(pid_t tid, const ptrace_context_t* context, 166501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown backtrace_frame_t* backtrace, size_t ignore_depth, size_t max_depth) { 167501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown#ifdef CORKSCREW_HAVE_ARCH 168501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown return unwind_backtrace_ptrace_arch(tid, context, backtrace, ignore_depth, max_depth); 169501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown#else 170501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown return -1; 171501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown#endif 172501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown} 173501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown 174501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brownstatic void init_backtrace_symbol(backtrace_symbol_t* symbol, uintptr_t pc) { 175501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown symbol->relative_pc = pc; 176f0c5872637a63e28e3cd314cfc915c07f76df9c6Jeff Brown symbol->map_name = NULL; 177501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown symbol->name = NULL; 178501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown symbol->demangled_name = NULL; 179501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown} 180501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown 181501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brownvoid get_backtrace_symbols(const backtrace_frame_t* backtrace, size_t frames, 182501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown backtrace_symbol_t* backtrace_symbols) { 183f0c5872637a63e28e3cd314cfc915c07f76df9c6Jeff Brown map_info_t* milist = acquire_my_map_info_list(); 184501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown for (size_t i = 0; i < frames; i++) { 185501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown const backtrace_frame_t* frame = &backtrace[i]; 186501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown backtrace_symbol_t* symbol = &backtrace_symbols[i]; 187501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown init_backtrace_symbol(symbol, frame->absolute_pc); 188501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown 189501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown const map_info_t* mi = find_map_info(milist, frame->absolute_pc); 190501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown if (mi) { 191501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown symbol->relative_pc = frame->absolute_pc - mi->start; 192f0c5872637a63e28e3cd314cfc915c07f76df9c6Jeff Brown if (mi->name[0]) { 193f0c5872637a63e28e3cd314cfc915c07f76df9c6Jeff Brown symbol->map_name = strdup(mi->name); 194f0c5872637a63e28e3cd314cfc915c07f76df9c6Jeff Brown } 195501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown#if HAVE_DLADDR 196501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown Dl_info info; 197501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown if (dladdr((const void*)frame->absolute_pc, &info) && info.dli_sname) { 198f0c5872637a63e28e3cd314cfc915c07f76df9c6Jeff Brown symbol->name = strdup(info.dli_sname); 199501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown symbol->demangled_name = demangle_symbol_name(symbol->name); 200501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown } 201501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown#endif 202501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown } 203501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown } 204f0c5872637a63e28e3cd314cfc915c07f76df9c6Jeff Brown release_my_map_info_list(milist); 205501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown} 206501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown 207501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brownvoid get_backtrace_symbols_ptrace(const ptrace_context_t* context, 208501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown const backtrace_frame_t* backtrace, size_t frames, 209501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown backtrace_symbol_t* backtrace_symbols) { 210501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown for (size_t i = 0; i < frames; i++) { 211501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown const backtrace_frame_t* frame = &backtrace[i]; 212501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown backtrace_symbol_t* symbol = &backtrace_symbols[i]; 213501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown init_backtrace_symbol(symbol, frame->absolute_pc); 214501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown 215501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown const map_info_t* mi; 216501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown const symbol_t* s; 217501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown find_symbol_ptrace(context, frame->absolute_pc, &mi, &s); 218501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown if (mi) { 219501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown symbol->relative_pc = frame->absolute_pc - mi->start; 220f0c5872637a63e28e3cd314cfc915c07f76df9c6Jeff Brown if (mi->name[0]) { 221f0c5872637a63e28e3cd314cfc915c07f76df9c6Jeff Brown symbol->map_name = strdup(mi->name); 222f0c5872637a63e28e3cd314cfc915c07f76df9c6Jeff Brown } 223501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown } 224501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown if (s) { 225f0c5872637a63e28e3cd314cfc915c07f76df9c6Jeff Brown symbol->name = strdup(s->name); 226501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown symbol->demangled_name = demangle_symbol_name(symbol->name); 227501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown } 228501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown } 229501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown} 230501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown 231501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brownvoid free_backtrace_symbols(backtrace_symbol_t* backtrace_symbols, size_t frames) { 232501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown for (size_t i = 0; i < frames; i++) { 233501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown backtrace_symbol_t* symbol = &backtrace_symbols[i]; 234f0c5872637a63e28e3cd314cfc915c07f76df9c6Jeff Brown free(symbol->map_name); 235f0c5872637a63e28e3cd314cfc915c07f76df9c6Jeff Brown free(symbol->name); 236501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown free(symbol->demangled_name); 237501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown init_backtrace_symbol(symbol, 0); 238501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown } 239501edd29b823ce1301d2effdd3a9e4b6e2b20b76Jeff Brown} 240