libsanitizer/tsan/tsan_symbolize.cc

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