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Diffstat (limited to 'third_party/abseil_cpp/absl/debugging/failure_signal_handler.h')
| -rw-r--r-- | third_party/abseil_cpp/absl/debugging/failure_signal_handler.h | 121 |
1 files changed, 0 insertions, 121 deletions
diff --git a/third_party/abseil_cpp/absl/debugging/failure_signal_handler.h b/third_party/abseil_cpp/absl/debugging/failure_signal_handler.h deleted file mode 100644 index 0c0f585d0f..0000000000 --- a/third_party/abseil_cpp/absl/debugging/failure_signal_handler.h +++ /dev/null @@ -1,121 +0,0 @@ -// Copyright 2018 The Abseil Authors. -// -// 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 -// -// https://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. -// -// ----------------------------------------------------------------------------- -// File: failure_signal_handler.h -// ----------------------------------------------------------------------------- -// -// This file configures the Abseil *failure signal handler* to capture and dump -// useful debugging information (such as a stacktrace) upon program failure. -// -// To use the failure signal handler, call `absl::InstallFailureSignalHandler()` -// very early in your program, usually in the first few lines of main(): -// -// int main(int argc, char** argv) { -// // Initialize the symbolizer to get a human-readable stack trace -// absl::InitializeSymbolizer(argv[0]); -// -// absl::FailureSignalHandlerOptions options; -// absl::InstallFailureSignalHandler(options); -// DoSomethingInteresting(); -// return 0; -// } -// -// Any program that raises a fatal signal (such as `SIGSEGV`, `SIGILL`, -// `SIGFPE`, `SIGABRT`, `SIGTERM`, `SIGBUG`, and `SIGTRAP`) will call the -// installed failure signal handler and provide debugging information to stderr. -// -// Note that you should *not* install the Abseil failure signal handler more -// than once. You may, of course, have another (non-Abseil) failure signal -// handler installed (which would be triggered if Abseil's failure signal -// handler sets `call_previous_handler` to `true`). - -#ifndef ABSL_DEBUGGING_FAILURE_SIGNAL_HANDLER_H_ -#define ABSL_DEBUGGING_FAILURE_SIGNAL_HANDLER_H_ - -#include "absl/base/config.h" - -namespace absl { -ABSL_NAMESPACE_BEGIN - -// FailureSignalHandlerOptions -// -// Struct for holding `absl::InstallFailureSignalHandler()` configuration -// options. -struct FailureSignalHandlerOptions { - // If true, try to symbolize the stacktrace emitted on failure, provided that - // you have initialized a symbolizer for that purpose. (See symbolize.h for - // more information.) - bool symbolize_stacktrace = true; - - // If true, try to run signal handlers on an alternate stack (if supported on - // the given platform). An alternate stack is useful for program crashes due - // to a stack overflow; by running on a alternate stack, the signal handler - // may run even when normal stack space has been exausted. The downside of - // using an alternate stack is that extra memory for the alternate stack needs - // to be pre-allocated. - bool use_alternate_stack = true; - - // If positive, indicates the number of seconds after which the failure signal - // handler is invoked to abort the program. Setting such an alarm is useful in - // cases where the failure signal handler itself may become hung or - // deadlocked. - int alarm_on_failure_secs = 3; - - // If true, call the previously registered signal handler for the signal that - // was received (if one was registered) after the existing signal handler - // runs. This mechanism can be used to chain signal handlers together. - // - // If false, the signal is raised to the default handler for that signal - // (which normally terminates the program). - // - // IMPORTANT: If true, the chained fatal signal handlers must not try to - // recover from the fatal signal. Instead, they should terminate the program - // via some mechanism, like raising the default handler for the signal, or by - // calling `_exit()`. Note that the failure signal handler may put parts of - // the Abseil library into a state from which they cannot recover. - bool call_previous_handler = false; - - // If non-null, indicates a pointer to a callback function that will be called - // upon failure, with a string argument containing failure data. This function - // may be used as a hook to write failure data to a secondary location, such - // as a log file. This function may also be called with null data, as a hint - // to flush any buffered data before the program may be terminated. Consider - // flushing any buffered data in all calls to this function. - // - // Since this function runs within a signal handler, it should be - // async-signal-safe if possible. - // See http://man7.org/linux/man-pages/man7/signal-safety.7.html - void (*writerfn)(const char*) = nullptr; -}; - -// InstallFailureSignalHandler() -// -// Installs a signal handler for the common failure signals `SIGSEGV`, `SIGILL`, -// `SIGFPE`, `SIGABRT`, `SIGTERM`, `SIGBUG`, and `SIGTRAP` (provided they exist -// on the given platform). The failure signal handler dumps program failure data -// useful for debugging in an unspecified format to stderr. This data may -// include the program counter, a stacktrace, and register information on some -// systems; do not rely on an exact format for the output, as it is subject to -// change. -void InstallFailureSignalHandler(const FailureSignalHandlerOptions& options); - -namespace debugging_internal { -const char* FailureSignalToString(int signo); -} // namespace debugging_internal - -ABSL_NAMESPACE_END -} // namespace absl - -#endif // ABSL_DEBUGGING_FAILURE_SIGNAL_HANDLER_H_ |