ab63124cd9
Replaces libbacktrace in CallStack. There is one small behavioral change, the BuildId data is added to the unwinds. Bug: 120606663 Test: All unit tests pass. Test: Run the fuzzer for over an hour without any crashes. Change-Id: Ic8a4247c515ce0d3cdc4d2cc15167d1948b15fa5
115 lines
3.1 KiB
C++
115 lines
3.1 KiB
C++
/*
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* Copyright (C) 2007 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define LOG_TAG "CallStack"
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#include <utils/Printer.h>
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#include <utils/Errors.h>
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#include <utils/Log.h>
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#include <unwindstack/AndroidUnwinder.h>
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#define CALLSTACK_WEAK // Don't generate weak definitions.
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#include <utils/CallStack.h>
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namespace android {
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CallStack::CallStack() {
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}
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CallStack::CallStack(const char* logtag, int32_t ignoreDepth) {
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this->update(ignoreDepth+1);
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this->log(logtag);
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}
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CallStack::~CallStack() {
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}
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void CallStack::update(int32_t ignoreDepth, pid_t tid) {
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if (ignoreDepth < 0) {
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ignoreDepth = 0;
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}
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mFrameLines.clear();
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unwindstack::AndroidLocalUnwinder unwinder;
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unwindstack::AndroidUnwinderData data;
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std::optional<pid_t> tid_val;
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if (tid != -1) {
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*tid_val = tid;
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}
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if (!unwinder.Unwind(tid_val, data)) {
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ALOGW("%s: Failed to unwind callstack: %s", __FUNCTION__, data.GetErrorString().c_str());
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}
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for (size_t i = ignoreDepth; i < data.frames.size(); i++) {
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auto& frame = data.frames[i];
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frame.num -= ignoreDepth;
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mFrameLines.push_back(String8(unwinder.FormatFrame(frame).c_str()));
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}
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}
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void CallStack::log(const char* logtag, android_LogPriority priority, const char* prefix) const {
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LogPrinter printer(logtag, priority, prefix, /*ignoreBlankLines*/false);
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print(printer);
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}
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void CallStack::dump(int fd, int indent, const char* prefix) const {
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FdPrinter printer(fd, indent, prefix);
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print(printer);
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}
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String8 CallStack::toString(const char* prefix) const {
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String8 str;
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String8Printer printer(&str, prefix);
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print(printer);
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return str;
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}
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void CallStack::print(Printer& printer) const {
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for (size_t i = 0; i < mFrameLines.size(); i++) {
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printer.printLine(mFrameLines[i]);
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}
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}
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// The following four functions may be used via weak symbol references from libutils.
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// Clients assume that if any of these symbols are available, then deleteStack() is.
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#ifdef WEAKS_AVAILABLE
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CallStack::CallStackUPtr CallStack::getCurrentInternal(int ignoreDepth) {
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CallStack::CallStackUPtr stack(new CallStack());
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stack->update(ignoreDepth + 1);
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return stack;
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}
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void CallStack::logStackInternal(const char* logtag, const CallStack* stack,
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android_LogPriority priority) {
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stack->log(logtag, priority);
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}
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String8 CallStack::stackToStringInternal(const char* prefix, const CallStack* stack) {
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return stack->toString(prefix);
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}
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void CallStack::deleteStack(CallStack* stack) {
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delete stack;
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}
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#endif // WEAKS_AVAILABLE
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}; // namespace android
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