| //===-- tsan_stack_trace.cc -----------------------------------------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // 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 |
