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