libsanitizer/sanitizer_common/sanitizer_symbolizer.cc

   1 //===-- sanitizer_symbolizer.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 shared between AddressSanitizer and ThreadSanitizer
   9 // run-time libraries.
  10 //===----------------------------------------------------------------------===//
  11
  12 #include "sanitizer_platform.h"
  13 #include "sanitizer_internal_defs.h"
  14 #include "sanitizer_placement_new.h"
  15 #include "sanitizer_symbolizer.h"
  16
  17 namespace __sanitizer {
  18
  19 Symbolizer *Symbolizer::symbolizer_;
  20 StaticSpinMutex Symbolizer::init_mu_;
  21 LowLevelAllocator Symbolizer::symbolizer_allocator_;
  22
  23 Symbolizer *Symbolizer::Disable() {
  24   CHECK_EQ(0, symbolizer_);
  25   // Initialize a dummy symbolizer.
  26   symbolizer_ = new(symbolizer_allocator_) Symbolizer;
  27   return symbolizer_;
  28 }
  29
  30 void Symbolizer::AddHooks(Symbolizer::StartSymbolizationHook start_hook,
  31                           Symbolizer::EndSymbolizationHook end_hook) {
  32   CHECK(start_hook_ == 0 && end_hook_ == 0);
  33   start_hook_ = start_hook;
  34   end_hook_ = end_hook;
  35 }
  36
  37 Symbolizer::Symbolizer() : start_hook_(0), end_hook_(0) {}
  38
  39 Symbolizer::SymbolizerScope::SymbolizerScope(const Symbolizer *sym)
  40     : sym_(sym) {
  41   if (sym_->start_hook_)
  42     sym_->start_hook_();
  43 }
  44
  45 Symbolizer::SymbolizerScope::~SymbolizerScope() {
  46   if (sym_->end_hook_)
  47     sym_->end_hook_();
  48 }
  49
  50 }  // namespace __sanitizer