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//===-- tsan_stack_trace.cpp ----------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file is a part of ThreadSanitizer (TSan), a race detector.
//
//===----------------------------------------------------------------------===//
#include "tsan_stack_trace.h"
#include "tsan_rtl.h"
#include "tsan_mman.h"
namespace __tsan {
VarSizeStackTrace::VarSizeStackTrace()
: StackTrace(nullptr, 0), trace_buffer(nullptr) {}
VarSizeStackTrace::~VarSizeStackTrace() {
ResizeBuffer(0);
}
void VarSizeStackTrace::ResizeBuffer(uptr new_size) {
if (trace_buffer) {
internal_free(trace_buffer);
}
trace_buffer =
(new_size > 0)
? (uptr *)internal_alloc(MBlockStackTrace,
new_size * sizeof(trace_buffer[0]))
: nullptr;
trace = trace_buffer;
size = new_size;
}
void VarSizeStackTrace::Init(const uptr *pcs, uptr cnt, uptr extra_top_pc) {
ResizeBuffer(cnt + !!extra_top_pc);
internal_memcpy(trace_buffer, pcs, cnt * sizeof(trace_buffer[0]));
if (extra_top_pc)
trace_buffer[cnt] = extra_top_pc;
}
void VarSizeStackTrace::ReverseOrder() {
for (u32 i = 0; i < (size >> 1); i++)
Swap(trace_buffer[i], trace_buffer[size - 1 - i]);
}
} // namespace __tsan
#if !SANITIZER_GO
void __sanitizer::BufferedStackTrace::UnwindImpl(
uptr pc, uptr bp, void *context, bool request_fast, u32 max_depth) {
uptr top = 0;
uptr bottom = 0;
if (StackTrace::WillUseFastUnwind(request_fast)) {
GetThreadStackTopAndBottom(false, &top, &bottom);
Unwind(max_depth, pc, bp, nullptr, top, bottom, true);
} else
Unwind(max_depth, pc, 0, context, 0, 0, false);
}
#endif // SANITIZER_GO
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