diff options
Diffstat (limited to 'compiler-rt/lib/tsan/rtl/tsan_stack_trace.cpp')
-rw-r--r-- | compiler-rt/lib/tsan/rtl/tsan_stack_trace.cpp | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/compiler-rt/lib/tsan/rtl/tsan_stack_trace.cpp b/compiler-rt/lib/tsan/rtl/tsan_stack_trace.cpp new file mode 100644 index 000000000000..403a21ae4ae3 --- /dev/null +++ b/compiler-rt/lib/tsan/rtl/tsan_stack_trace.cpp @@ -0,0 +1,63 @@ +//===-- 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 |