ea26b33248
- Change the printed name from pointer to allocation to be explicit about what is wrong. - Change the signal to be SIGRTMAX - 19 instead of SIGRTMIN. This should prevent problems if we have to reserve other real time signals. Bug: 28218530 Change-Id: Ic7d9c471929264d8e47bafaffc16e099840c9e71
129 lines
4.7 KiB
C++
129 lines
4.7 KiB
C++
/*
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* Copyright (C) 2015 The Android Open Source Project
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <stdint.h>
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#include "backtrace.h"
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#include "Config.h"
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#include "DebugData.h"
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#include "debug_disable.h"
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#include "debug_log.h"
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#include "FreeTrackData.h"
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#include "malloc_debug.h"
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FreeTrackData::FreeTrackData(DebugData* debug, const Config& config)
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: OptionData(debug), backtrace_num_frames_(config.free_track_backtrace_num_frames) {
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cmp_mem_.resize(4096);
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memset(cmp_mem_.data(), config.fill_free_value, cmp_mem_.size());
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}
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void FreeTrackData::LogFreeError(const Header* header, const uint8_t* pointer) {
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error_log(LOG_DIVIDER);
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error_log("+++ ALLOCATION %p USED AFTER FREE", pointer);
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uint8_t fill_free_value = debug_->config().fill_free_value;
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for (size_t i = 0; i < header->usable_size; i++) {
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if (pointer[i] != fill_free_value) {
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error_log(" allocation[%zu] = 0x%02x (expected 0x%02x)", i, pointer[i], fill_free_value);
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}
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}
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auto back_iter = backtraces_.find(header);
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if (back_iter != backtraces_.end()) {
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const BacktraceHeader* back_header = back_iter->second;
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error_log("Backtrace at time of free:");
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backtrace_log(&back_header->frames[0], back_header->num_frames);
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}
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error_log(LOG_DIVIDER);
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}
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void FreeTrackData::VerifyAndFree(const Header* header) {
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const void* pointer = debug_->GetPointer(header);
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if (header->tag != DEBUG_FREE_TAG) {
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error_log(LOG_DIVIDER);
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error_log("+++ ALLOCATION %p HAS CORRUPTED HEADER TAG 0x%x AFTER FREE", pointer, header->tag);
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error_log(LOG_DIVIDER);
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} else {
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const uint8_t* memory = reinterpret_cast<const uint8_t*>(pointer);
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size_t bytes = header->usable_size;
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bytes = (bytes < debug_->config().fill_on_free_bytes) ? bytes
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: debug_->config().fill_on_free_bytes;
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while (bytes > 0) {
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size_t bytes_to_cmp = (bytes < cmp_mem_.size()) ? bytes : cmp_mem_.size();
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if (memcmp(memory, cmp_mem_.data(), bytes_to_cmp) != 0) {
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LogFreeError(header, reinterpret_cast<const uint8_t*>(pointer));
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break;
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}
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bytes -= bytes_to_cmp;
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memory = &memory[bytes_to_cmp];
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}
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}
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auto back_iter = backtraces_.find(header);
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if (back_iter != backtraces_.end()) {
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g_dispatch->free(reinterpret_cast<void*>(back_iter->second));
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backtraces_.erase(header);
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}
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g_dispatch->free(header->orig_pointer);
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}
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void FreeTrackData::Add(const Header* header) {
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pthread_mutex_lock(&mutex_);
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if (list_.size() == debug_->config().free_track_allocations) {
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const Header* old_header = list_.back();
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VerifyAndFree(old_header);
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list_.pop_back();
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}
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if (backtrace_num_frames_ > 0) {
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BacktraceHeader* back_header = reinterpret_cast<BacktraceHeader*>(
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g_dispatch->malloc(sizeof(BacktraceHeader) + backtrace_num_frames_ * sizeof(uintptr_t)));
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if (back_header) {
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back_header->num_frames = backtrace_get(&back_header->frames[0], backtrace_num_frames_);
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backtraces_[header] = back_header;
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}
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}
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list_.push_front(header);
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pthread_mutex_unlock(&mutex_);
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}
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void FreeTrackData::VerifyAll() {
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for (const auto& header : list_) {
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VerifyAndFree(header);
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}
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list_.clear();
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}
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void FreeTrackData::LogBacktrace(const Header* header) {
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auto back_iter = backtraces_.find(header);
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if (back_iter == backtraces_.end()) {
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return;
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}
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error_log("Backtrace of original free:");
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backtrace_log(&back_iter->second->frames[0], back_iter->second->num_frames);
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}
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