58 lines · cpp
1//===-- tsan_stack_trace.cpp ----------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8//9// This file is a part of ThreadSanitizer (TSan), a race detector.10//11//===----------------------------------------------------------------------===//12#include "tsan_stack_trace.h"13#include "tsan_rtl.h"14#include "tsan_mman.h"15 16namespace __tsan {17 18VarSizeStackTrace::VarSizeStackTrace()19 : StackTrace(nullptr, 0), trace_buffer(nullptr) {}20 21VarSizeStackTrace::~VarSizeStackTrace() {22 ResizeBuffer(0);23}24 25void VarSizeStackTrace::ResizeBuffer(uptr new_size) {26 Free(trace_buffer);27 trace_buffer = (new_size > 0)28 ? (uptr *)Alloc(new_size * sizeof(trace_buffer[0]))29 : nullptr;30 trace = trace_buffer;31 size = new_size;32}33 34void VarSizeStackTrace::Init(const uptr *pcs, uptr cnt, uptr extra_top_pc) {35 ResizeBuffer(cnt + !!extra_top_pc);36 internal_memcpy(trace_buffer, pcs, cnt * sizeof(trace_buffer[0]));37 if (extra_top_pc)38 trace_buffer[cnt] = extra_top_pc;39}40 41void VarSizeStackTrace::ReverseOrder() {42 for (u32 i = 0; i < (size >> 1); i++)43 Swap(trace_buffer[i], trace_buffer[size - 1 - i]);44}45 46} // namespace __tsan47 48#if !SANITIZER_GO49void __sanitizer::BufferedStackTrace::UnwindImpl(50 uptr pc, uptr bp, void *context, bool request_fast, u32 max_depth) {51 uptr top = 0;52 uptr bottom = 0;53 GetThreadStackTopAndBottom(false, &top, &bottom);54 bool fast = StackTrace::WillUseFastUnwind(request_fast);55 Unwind(max_depth, pc, bp, context, top, bottom, fast);56}57#endif // SANITIZER_GO58