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
23namespace __tsan {
24
25void EnterSymbolizer() {
26  ThreadState *thr = cur_thread();
27  CHECK(!thr->in_symbolizer);
28  thr->in_symbolizer = true;
29  thr->ignore_interceptors++;
30}
31
32void 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.
41SANITIZER_WEAK_DEFAULT_IMPL
42bool __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
48SymbolizedStack *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
69ReportLocation *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
78void SymbolizeFlush() {
79  Symbolizer::GetOrInit()->Flush();
80}
81
82}  // namespace __tsan
83