65 lines
2.5 KiB
C++
65 lines
2.5 KiB
C++
//
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// 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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#ifndef ABSL_DEBUGGING_INTERNAL_EXAMINE_STACK_H_
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#define ABSL_DEBUGGING_INTERNAL_EXAMINE_STACK_H_
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#include "absl/base/config.h"
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namespace absl {
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ABSL_NAMESPACE_BEGIN
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namespace debugging_internal {
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// Type of function used for printing in stack trace dumping, etc.
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// We avoid closures to keep things simple.
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typedef void OutputWriter(const char*, void*);
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// RegisterDebugStackTraceHook() allows to register a single routine
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// `hook` that is called each time DumpStackTrace() is called.
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// `hook` may be called from a signal handler.
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typedef void (*SymbolizeUrlEmitter)(void* const stack[], int depth,
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OutputWriter* writer, void* writer_arg);
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// Registration of SymbolizeUrlEmitter for use inside of a signal handler.
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// This is inherently unsafe and must be signal safe code.
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void RegisterDebugStackTraceHook(SymbolizeUrlEmitter hook);
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SymbolizeUrlEmitter GetDebugStackTraceHook();
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// Returns the program counter from signal context, or nullptr if
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// unknown. `vuc` is a ucontext_t*. We use void* to avoid the use of
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// ucontext_t on non-POSIX systems.
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void* GetProgramCounter(void* const vuc);
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// Uses `writer` to dump the program counter, stack trace, and stack
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// frame sizes.
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void DumpPCAndFrameSizesAndStackTrace(void* const pc, void* const stack[],
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int frame_sizes[], int depth,
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int min_dropped_frames,
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bool symbolize_stacktrace,
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OutputWriter* writer, void* writer_arg);
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// Dump current stack trace omitting the topmost `min_dropped_frames` stack
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// frames.
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void DumpStackTrace(int min_dropped_frames, int max_num_frames,
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bool symbolize_stacktrace, OutputWriter* writer,
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void* writer_arg);
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} // namespace debugging_internal
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ABSL_NAMESPACE_END
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} // namespace absl
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#endif // ABSL_DEBUGGING_INTERNAL_EXAMINE_STACK_H_
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