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