1 //===--- rtsan_stack.cpp - Realtime Sanitizer -------------------*- C++ -*-===//
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-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 //===----------------------------------------------------------------------===//
10
11 #include "rtsan_stack.h"
12
13 #include <sanitizer_common/sanitizer_flags.h>
14 #include <sanitizer_common/sanitizer_stacktrace.h>
15
16 using namespace __sanitizer;
17 using namespace __rtsan;
18
19 // We must define our own implementation of this method for our runtime.
20 // This one is just copied from UBSan.
21 namespace __sanitizer {
UnwindImpl(uptr pc,uptr bp,void * context,bool request_fast,u32 max_depth)22 void BufferedStackTrace::UnwindImpl(uptr pc, uptr bp, void *context,
23 bool request_fast, u32 max_depth) {
24 uptr top = 0;
25 uptr bottom = 0;
26 GetThreadStackTopAndBottom(false, &top, &bottom);
27 bool fast = StackTrace::WillUseFastUnwind(request_fast);
28 Unwind(max_depth, pc, bp, context, top, bottom, fast);
29 }
30 } // namespace __sanitizer
31
SetGlobalStackTraceFormat()32 static void SetGlobalStackTraceFormat() {
33 SetCommonFlagsDefaults();
34 CommonFlags cf;
35 cf.CopyFrom(*common_flags());
36 cf.stack_trace_format = "DEFAULT";
37 cf.external_symbolizer_path = GetEnv("RTSAN_SYMBOLIZER_PATH");
38 OverrideCommonFlags(cf);
39 }
40
PrintStackTrace()41 void __rtsan::PrintStackTrace() {
42
43 BufferedStackTrace stack{};
44
45 GET_CURRENT_PC_BP;
46 stack.Unwind(pc, bp, nullptr, common_flags()->fast_unwind_on_fatal);
47
48 SetGlobalStackTraceFormat();
49 stack.Print();
50 }
51