1/* Copyright 2016 The TensorFlow Authors. All Rights Reserved. 2 3Licensed under the Apache License, Version 2.0 (the "License"); 4you may not use this file except in compliance with the License. 5You may obtain a copy of the License at 6 7 http://www.apache.org/licenses/LICENSE-2.0 8 9Unless required by applicable law or agreed to in writing, software 10distributed under the License is distributed on an "AS IS" BASIS, 11WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12See the License for the specific language governing permissions and 13limitations under the License. 14==============================================================================*/ 15 16#ifndef TENSORFLOW_CORE_PLATFORM_DEFAULT_STACKTRACE_H_ 17#define TENSORFLOW_CORE_PLATFORM_DEFAULT_STACKTRACE_H_ 18 19#include "tensorflow/core/platform/platform.h" 20#if !defined(IS_MOBILE_PLATFORM) && defined(PLATFORM_POSIX) && \ 21 (defined(__clang__) || defined(__GNUC__)) 22#define TF_GENERATE_BACKTRACE 23#endif 24 25#if defined(TF_GENERATE_BACKTRACE) 26#include <dlfcn.h> 27#include <execinfo.h> 28#include <stdio.h> 29#include <string.h> 30#include <unistd.h> 31#endif // defined(TF_GENERATE_BACKTRACE) 32 33#include <sstream> 34#include <string> 35#include "tensorflow/core/platform/abi.h" 36 37namespace tensorflow { 38 39// Function to create a pretty stacktrace. 40inline std::string CurrentStackTrace() { 41#if defined(TF_GENERATE_BACKTRACE) 42 std::stringstream ss(""); 43 ss << "*** Begin stack trace ***" << std::endl; 44 45 // Get the mangled stack trace. 46 int buffer_size = 128; 47 void* trace[128]; 48 buffer_size = backtrace(trace, buffer_size); 49 50 for (int i = 0; i < buffer_size; ++i) { 51 const char* symbol = ""; 52 Dl_info info; 53 if (dladdr(trace[i], &info)) { 54 if (info.dli_sname != nullptr) { 55 symbol = info.dli_sname; 56 } 57 } 58 59 std::string demangled = tensorflow::port::MaybeAbiDemangle(symbol); 60 if (demangled.length()) { 61 ss << "\t" << demangled << std::endl; 62 } else { 63 ss << "\t" << symbol << std::endl; 64 } 65 } 66 67 ss << "*** End stack trace ***" << std::endl; 68 return ss.str(); 69#else 70 return std::string(); 71#endif // defined(TF_GENERATE_BACKTRACE) 72} 73 74inline void DebugWriteToString(const char* data, void* arg) { 75 reinterpret_cast<std::string*>(arg)->append(data); 76} 77 78// A dummy class that does nothing. Someday, add real support. 79class SavedStackTrace { 80 public: 81 SavedStackTrace() {} 82 83 void CreateCurrent(int skip_count) {} 84 85 void Reset() {} 86 87 typedef void DebugWriter(const char*, void*); 88 void Dump(DebugWriter* writerfn, void* arg) const {} 89 90 int depth() const { return 0; } 91 void* const* stack() const { return stack_; } 92 93 private: 94 void* stack_[32]; 95}; 96 97} // namespace tensorflow 98 99#endif // TENSORFLOW_CORE_PLATFORM_DEFAULT_STACKTRACE_H_ 100