46756821c4
This includes removing the map_info.c source and replacing it with the BacktraceMap class to handle all map related code. Change all callers of libbacktrace map functionality. Also modify the corkscrew thread code so that it doesn't need to build the map twice (once in the corkscrew format and once in the libbacktrace format). Change-Id: I32865a39f83a3dd6f958fc03c2759ba47d12382e
125 lines
3.5 KiB
C++
125 lines
3.5 KiB
C++
/*
|
|
* Copyright (C) 2013 The Android Open Source Project
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
#define LOG_TAG "libbacktrace"
|
|
|
|
#include <backtrace/Backtrace.h>
|
|
#include <backtrace/BacktraceMap.h>
|
|
|
|
#include <sys/types.h>
|
|
#include <string.h>
|
|
|
|
#include <libunwind.h>
|
|
#include <libunwind-ptrace.h>
|
|
|
|
#include "UnwindPtrace.h"
|
|
|
|
UnwindPtrace::UnwindPtrace() : addr_space_(NULL), upt_info_(NULL) {
|
|
}
|
|
|
|
UnwindPtrace::~UnwindPtrace() {
|
|
if (upt_info_) {
|
|
_UPT_destroy(upt_info_);
|
|
upt_info_ = NULL;
|
|
}
|
|
if (addr_space_) {
|
|
unw_destroy_addr_space(addr_space_);
|
|
addr_space_ = NULL;
|
|
}
|
|
}
|
|
|
|
bool UnwindPtrace::Unwind(size_t num_ignore_frames) {
|
|
addr_space_ = unw_create_addr_space(&_UPT_accessors, 0);
|
|
if (!addr_space_) {
|
|
BACK_LOGW("unw_create_addr_space failed.");
|
|
return false;
|
|
}
|
|
|
|
upt_info_ = reinterpret_cast<struct UPT_info*>(_UPT_create(backtrace_obj_->Tid()));
|
|
if (!upt_info_) {
|
|
BACK_LOGW("Failed to create upt info.");
|
|
return false;
|
|
}
|
|
|
|
unw_cursor_t cursor;
|
|
int ret = unw_init_remote(&cursor, addr_space_, upt_info_);
|
|
if (ret < 0) {
|
|
BACK_LOGW("unw_init_remote failed %d", ret);
|
|
return false;
|
|
}
|
|
|
|
std::vector<backtrace_frame_data_t>* frames = GetFrames();
|
|
frames->reserve(MAX_BACKTRACE_FRAMES);
|
|
size_t num_frames = 0;
|
|
do {
|
|
unw_word_t pc;
|
|
ret = unw_get_reg(&cursor, UNW_REG_IP, &pc);
|
|
if (ret < 0) {
|
|
BACK_LOGW("Failed to read IP %d", ret);
|
|
break;
|
|
}
|
|
unw_word_t sp;
|
|
ret = unw_get_reg(&cursor, UNW_REG_SP, &sp);
|
|
if (ret < 0) {
|
|
BACK_LOGW("Failed to read SP %d", ret);
|
|
break;
|
|
}
|
|
|
|
if (num_ignore_frames == 0) {
|
|
frames->resize(num_frames+1);
|
|
backtrace_frame_data_t* frame = &frames->at(num_frames);
|
|
frame->num = num_frames;
|
|
frame->pc = static_cast<uintptr_t>(pc);
|
|
frame->sp = static_cast<uintptr_t>(sp);
|
|
frame->stack_size = 0;
|
|
|
|
if (num_frames > 0) {
|
|
backtrace_frame_data_t* prev = &frames->at(num_frames-1);
|
|
prev->stack_size = frame->sp - prev->sp;
|
|
}
|
|
|
|
frame->func_name = backtrace_obj_->GetFunctionName(frame->pc, &frame->func_offset);
|
|
|
|
frame->map = backtrace_obj_->FindMap(frame->pc);
|
|
|
|
num_frames++;
|
|
} else {
|
|
num_ignore_frames--;
|
|
}
|
|
ret = unw_step (&cursor);
|
|
} while (ret > 0 && num_frames < MAX_BACKTRACE_FRAMES);
|
|
|
|
return true;
|
|
}
|
|
|
|
std::string UnwindPtrace::GetFunctionNameRaw(uintptr_t pc, uintptr_t* offset) {
|
|
*offset = 0;
|
|
char buf[512];
|
|
unw_word_t value;
|
|
if (unw_get_proc_name_by_ip(addr_space_, pc, buf, sizeof(buf), &value,
|
|
upt_info_) >= 0 && buf[0] != '\0') {
|
|
*offset = static_cast<uintptr_t>(value);
|
|
return buf;
|
|
}
|
|
return "";
|
|
}
|
|
|
|
//-------------------------------------------------------------------------
|
|
// C++ object creation function.
|
|
//-------------------------------------------------------------------------
|
|
Backtrace* CreatePtraceObj(pid_t pid, pid_t tid, BacktraceMap* map) {
|
|
return new BacktracePtrace(new UnwindPtrace(), pid, tid, map);
|
|
}
|