1 /* 2 * Copyright (C) 2007 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #define LOG_TAG "CallStack" 18 19 #include <utils/CallStack.h> 20 #include <utils/Printer.h> 21 #include <utils/Errors.h> 22 #include <utils/Log.h> 23 #include <UniquePtr.h> 24 25 #include <backtrace/Backtrace.h> 26 27 namespace android { 28 29 CallStack::CallStack() { 30 } 31 32 CallStack::CallStack(const char* logtag, int32_t ignoreDepth) { 33 this->update(ignoreDepth+1); 34 this->log(logtag); 35 } 36 37 CallStack::~CallStack() { 38 } 39 40 void CallStack::update(int32_t ignoreDepth, pid_t tid) { 41 mFrameLines.clear(); 42 43 UniquePtr<Backtrace> backtrace(Backtrace::Create(BACKTRACE_CURRENT_PROCESS, tid)); 44 if (!backtrace->Unwind(ignoreDepth)) { 45 ALOGW("%s: Failed to unwind callstack.", __FUNCTION__); 46 } 47 for (size_t i = 0; i < backtrace->NumFrames(); i++) { 48 mFrameLines.push_back(String8(backtrace->FormatFrameData(i).c_str())); 49 } 50 } 51 52 void CallStack::log(const char* logtag, android_LogPriority priority, const char* prefix) const { 53 LogPrinter printer(logtag, priority, prefix, /*ignoreBlankLines*/false); 54 print(printer); 55 } 56 57 void CallStack::dump(int fd, int indent, const char* prefix) const { 58 FdPrinter printer(fd, indent, prefix); 59 print(printer); 60 } 61 62 String8 CallStack::toString(const char* prefix) const { 63 String8 str; 64 65 String8Printer printer(&str, prefix); 66 print(printer); 67 68 return str; 69 } 70 71 void CallStack::print(Printer& printer) const { 72 for (size_t i = 0; i < mFrameLines.size(); i++) { 73 printer.printLine(mFrameLines[i]); 74 } 75 } 76 77 }; // namespace android 78
