| /* |
| * Copyright (C) 2007 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 "CallStack" |
| |
| #include <utils/Printer.h> |
| #include <utils/Errors.h> |
| #include <utils/Log.h> |
| |
| #include <unwindstack/AndroidUnwinder.h> |
| |
| #define CALLSTACK_WEAK // Don't generate weak definitions. |
| #include <utils/CallStack.h> |
| |
| namespace android { |
| |
| CallStack::CallStack() { |
| } |
| |
| CallStack::CallStack(const char* logtag, int32_t ignoreDepth) { |
| this->update(ignoreDepth+1); |
| this->log(logtag); |
| } |
| |
| CallStack::~CallStack() { |
| } |
| |
| void CallStack::update(int32_t ignoreDepth, pid_t tid) { |
| if (ignoreDepth < 0) { |
| ignoreDepth = 0; |
| } |
| |
| mFrameLines.clear(); |
| |
| unwindstack::AndroidLocalUnwinder unwinder; |
| unwindstack::AndroidUnwinderData data; |
| std::optional<pid_t> tid_val; |
| if (tid != -1) { |
| tid_val = tid; |
| } |
| if (!unwinder.Unwind(tid_val, data)) { |
| ALOGW("%s: Failed to unwind callstack: %s", __FUNCTION__, data.GetErrorString().c_str()); |
| } |
| for (size_t i = ignoreDepth; i < data.frames.size(); i++) { |
| auto& frame = data.frames[i]; |
| frame.num -= ignoreDepth; |
| mFrameLines.push_back(String8(unwinder.FormatFrame(frame).c_str())); |
| } |
| } |
| |
| void CallStack::log(const char* logtag, android_LogPriority priority, const char* prefix) const { |
| LogPrinter printer(logtag, priority, prefix, /*ignoreBlankLines*/false); |
| print(printer); |
| } |
| |
| void CallStack::dump(int fd, int indent, const char* prefix) const { |
| FdPrinter printer(fd, indent, prefix); |
| print(printer); |
| } |
| |
| String8 CallStack::toString(const char* prefix) const { |
| String8 str; |
| |
| String8Printer printer(&str, prefix); |
| print(printer); |
| |
| return str; |
| } |
| |
| void CallStack::print(Printer& printer) const { |
| for (size_t i = 0; i < mFrameLines.size(); i++) { |
| printer.printLine(mFrameLines[i].c_str()); |
| } |
| } |
| |
| // The following four functions may be used via weak symbol references from libutils. |
| // Clients assume that if any of these symbols are available, then deleteStack() is. |
| |
| #ifdef WEAKS_AVAILABLE |
| |
| CallStack::CallStackUPtr CallStack::getCurrentInternal(int ignoreDepth) { |
| CallStack::CallStackUPtr stack(new CallStack()); |
| stack->update(ignoreDepth + 1); |
| return stack; |
| } |
| |
| void CallStack::logStackInternal(const char* logtag, const CallStack* stack, |
| android_LogPriority priority) { |
| stack->log(logtag, priority); |
| } |
| |
| String8 CallStack::stackToStringInternal(const char* prefix, const CallStack* stack) { |
| return stack->toString(prefix); |
| } |
| |
| void CallStack::deleteStack(CallStack* stack) { |
| delete stack; |
| } |
| |
| #endif // WEAKS_AVAILABLE |
| |
| }; // namespace android |