1 //===-- tsan_stack_trace.cc -----------------------------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file is a part of ThreadSanitizer (TSan), a race detector.
12 //===----------------------------------------------------------------------===//
13 #include "tsan_stack_trace.h"
15 #include "tsan_mman.h"
19 VarSizeStackTrace::VarSizeStackTrace()
20 : StackTrace(nullptr, 0), trace_buffer(nullptr) {}
22 VarSizeStackTrace::~VarSizeStackTrace() {
26 void VarSizeStackTrace::ResizeBuffer(uptr new_size) {
28 internal_free(trace_buffer);
32 ? (uptr *)internal_alloc(MBlockStackTrace,
33 new_size * sizeof(trace_buffer[0]))
39 void VarSizeStackTrace::Init(const uptr *pcs, uptr cnt, uptr extra_top_pc) {
40 ResizeBuffer(cnt + !!extra_top_pc);
41 internal_memcpy(trace_buffer, pcs, cnt * sizeof(trace_buffer[0]));
43 trace_buffer[cnt] = extra_top_pc;
46 void VarSizeStackTrace::ReverseOrder() {
47 for (u32 i = 0; i < (size >> 1); i++)
48 Swap(trace_buffer[i], trace_buffer[size - 1 - i]);