Abseil Common Libraries (C++) (grcp 依赖)
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60 lines
1.7 KiB
60 lines
1.7 KiB
// Copyright 2000 - 2007 Google Inc. |
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// All rights reserved. |
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// |
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// Author: Sanjay Ghemawat |
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// |
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// Portable implementation - just use glibc |
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// |
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// Note: The glibc implementation may cause a call to malloc. |
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// This can cause a deadlock in HeapProfiler. |
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#ifndef ABSL_DEBUGGING_INTERNAL_STACKTRACE_GENERIC_INL_H_ |
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#define ABSL_DEBUGGING_INTERNAL_STACKTRACE_GENERIC_INL_H_ |
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#include <execinfo.h> |
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#include <cstring> |
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#include "absl/debugging/stacktrace.h" |
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template <bool IS_STACK_FRAMES, bool IS_WITH_CONTEXT> |
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static int UnwindImpl(void** result, int* sizes, int max_depth, int skip_count, |
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const void *ucp, int *min_dropped_frames) { |
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static_cast<void>(ucp); // Unused. |
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static const int kStackLength = 64; |
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void * stack[kStackLength]; |
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int size; |
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size = backtrace(stack, kStackLength); |
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skip_count++; // we want to skip the current frame as well |
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int result_count = size - skip_count; |
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if (result_count < 0) |
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result_count = 0; |
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if (result_count > max_depth) |
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result_count = max_depth; |
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for (int i = 0; i < result_count; i++) |
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result[i] = stack[i + skip_count]; |
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if (IS_STACK_FRAMES) { |
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// No implementation for finding out the stack frame sizes yet. |
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memset(sizes, 0, sizeof(*sizes) * result_count); |
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} |
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if (min_dropped_frames != nullptr) { |
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if (size - skip_count - max_depth > 0) { |
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*min_dropped_frames = size - skip_count - max_depth; |
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} else { |
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*min_dropped_frames = 0; |
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} |
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} |
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return result_count; |
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} |
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namespace absl { |
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namespace debugging_internal { |
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bool StackTraceWorksForTest() { |
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return true; |
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} |
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} // namespace debugging_internal |
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} // namespace absl |
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#endif // ABSL_DEBUGGING_INTERNAL_STACKTRACE_GENERIC_INL_H_
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