Abseil Common Libraries (C++) (grcp 依赖)
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99 lines
3.6 KiB
99 lines
3.6 KiB
// Copyright 2018 The Abseil Authors. |
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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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// https://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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// ----------------------------------------------------------------------------- |
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// File: symbolize.h |
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// ----------------------------------------------------------------------------- |
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// |
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// This file configures the Abseil symbolizer for use in converting instruction |
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// pointer addresses (program counters) into human-readable names (function |
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// calls, etc.) within Abseil code. |
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// |
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// The symbolizer may be invoked from several sources: |
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// |
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// * Implicitly, through the installation of an Abseil failure signal handler. |
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// (See failure_signal_handler.h for more information.) |
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// * By calling `Symbolize()` directly on a program counter you obtain through |
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// `absl::GetStackTrace()` or `absl::GetStackFrames()`. (See stacktrace.h |
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// for more information. |
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// * By calling `Symbolize()` directly on a program counter you obtain through |
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// other means (which would be platform-dependent). |
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// |
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// In all of the above cases, the symbolizer must first be initialized before |
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// any program counter values can be symbolized. If you are installing a failure |
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// signal handler, initialize the symbolizer before you do so. |
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// |
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// Example: |
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// |
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// int main(int argc, char** argv) { |
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// // Initialize the Symbolizer before installing the failure signal handler |
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// absl::InitializeSymbolizer(argv[0]); |
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// |
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// // Now you may install the failure signal handler |
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// absl::FailureSignalHandlerOptions options; |
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// absl::InstallFailureSignalHandler(options); |
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// |
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// // Start running your main program |
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// ... |
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// return 0; |
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// } |
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// |
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#ifndef ABSL_DEBUGGING_SYMBOLIZE_H_ |
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#define ABSL_DEBUGGING_SYMBOLIZE_H_ |
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#include "absl/debugging/internal/symbolize.h" |
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namespace absl { |
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inline namespace lts_2019_08_08 { |
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// InitializeSymbolizer() |
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// |
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// Initializes the program counter symbolizer, given the path of the program |
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// (typically obtained through `main()`s `argv[0]`). The Abseil symbolizer |
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// allows you to read program counters (instruction pointer values) using their |
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// human-readable names within output such as stack traces. |
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// |
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// Example: |
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// |
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// int main(int argc, char *argv[]) { |
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// absl::InitializeSymbolizer(argv[0]); |
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// // Now you can use the symbolizer |
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// } |
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void InitializeSymbolizer(const char* argv0); |
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// Symbolize() |
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// |
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// Symbolizes a program counter (instruction pointer value) `pc` and, on |
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// success, writes the name to `out`. The symbol name is demangled, if possible. |
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// Note that the symbolized name may be truncated and will be NUL-terminated. |
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// Demangling is supported for symbols generated by GCC 3.x or newer). Returns |
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// `false` on failure. |
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// |
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// Example: |
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// |
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// // Print a program counter and its symbol name. |
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// static void DumpPCAndSymbol(void *pc) { |
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// char tmp[1024]; |
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// const char *symbol = "(unknown)"; |
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// if (absl::Symbolize(pc, tmp, sizeof(tmp))) { |
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// symbol = tmp; |
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// } |
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// absl::PrintF("%*p %s\n", pc, symbol); |
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// } |
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bool Symbolize(const void *pc, char *out, int out_size); |
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} // inline namespace lts_2019_08_08 |
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} // namespace absl |
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#endif // ABSL_DEBUGGING_SYMBOLIZE_H_
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