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-rw-r--r--lib/tsan/rtl/tsan_stack_trace.cpp63
1 files changed, 63 insertions, 0 deletions
diff --git a/lib/tsan/rtl/tsan_stack_trace.cpp b/lib/tsan/rtl/tsan_stack_trace.cpp
new file mode 100644
index 000000000000..403a21ae4ae3
--- /dev/null
+++ b/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