• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
1 //===-- tsan_symbolize.cc -------------------------------------------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file is a part of ThreadSanitizer (TSan), a race detector.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #include "tsan_symbolize.h"
15 
16 #include "sanitizer_common/sanitizer_common.h"
17 #include "sanitizer_common/sanitizer_placement_new.h"
18 #include "sanitizer_common/sanitizer_symbolizer.h"
19 #include "tsan_flags.h"
20 #include "tsan_report.h"
21 #include "tsan_rtl.h"
22 
23 namespace __tsan {
24 
EnterSymbolizer()25 void EnterSymbolizer() {
26   ThreadState *thr = cur_thread();
27   CHECK(!thr->in_symbolizer);
28   thr->in_symbolizer = true;
29   thr->ignore_interceptors++;
30 }
31 
ExitSymbolizer()32 void ExitSymbolizer() {
33   ThreadState *thr = cur_thread();
34   CHECK(thr->in_symbolizer);
35   thr->in_symbolizer = false;
36   thr->ignore_interceptors--;
37 }
38 
39 // May be overriden by JIT/JAVA/etc,
40 // whatever produces PCs marked with kExternalPCBit.
41 SANITIZER_WEAK_DEFAULT_IMPL
__tsan_symbolize_external(uptr pc,char * func_buf,uptr func_siz,char * file_buf,uptr file_siz,int * line,int * col)42 bool __tsan_symbolize_external(uptr pc, char *func_buf, uptr func_siz,
43                                char *file_buf, uptr file_siz, int *line,
44                                int *col) {
45   return false;
46 }
47 
SymbolizeCode(uptr addr)48 SymbolizedStack *SymbolizeCode(uptr addr) {
49   // Check if PC comes from non-native land.
50   if (addr & kExternalPCBit) {
51     // Declare static to not consume too much stack space.
52     // We symbolize reports in a single thread, so this is fine.
53     static char func_buf[1024];
54     static char file_buf[1024];
55     int line, col;
56     SymbolizedStack *frame = SymbolizedStack::New(addr);
57     if (__tsan_symbolize_external(addr, func_buf, sizeof(func_buf), file_buf,
58                                   sizeof(file_buf), &line, &col)) {
59       frame->info.function = internal_strdup(func_buf);
60       frame->info.file = internal_strdup(file_buf);
61       frame->info.line = line;
62       frame->info.column = col;
63     }
64     return frame;
65   }
66   return Symbolizer::GetOrInit()->SymbolizePC(addr);
67 }
68 
SymbolizeData(uptr addr)69 ReportLocation *SymbolizeData(uptr addr) {
70   DataInfo info;
71   if (!Symbolizer::GetOrInit()->SymbolizeData(addr, &info))
72     return 0;
73   ReportLocation *ent = ReportLocation::New(ReportLocationGlobal);
74   internal_memcpy(&ent->global, &info, sizeof(info));
75   return ent;
76 }
77 
SymbolizeFlush()78 void SymbolizeFlush() {
79   Symbolizer::GetOrInit()->Flush();
80 }
81 
82 }  // namespace __tsan
83