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::GetOrNull() {
  24   SpinMutexLock l(&init_mu_);
  25   return symbolizer_;
  26 }
  27
  28 Symbolizer *Symbolizer::Get() {
  29   SpinMutexLock l(&init_mu_);
  30   RAW_CHECK_MSG(symbolizer_ != 0, "Using uninitialized symbolizer!");
  31   return symbolizer_;
  32 }
  33
  34 Symbolizer *Symbolizer::Disable() {
  35   CHECK_EQ(0, symbolizer_);
  36   // Initialize a dummy symbolizer.
  37   symbolizer_ = new(symbolizer_allocator_) Symbolizer;
  38   return symbolizer_;
  39 }
  40
  41 void Symbolizer::AddHooks(Symbolizer::StartSymbolizationHook start_hook,
  42                           Symbolizer::EndSymbolizationHook end_hook) {
  43   CHECK(start_hook_ == 0 && end_hook_ == 0);
  44   start_hook_ = start_hook;
  45   end_hook_ = end_hook;
  46 }
  47
  48 Symbolizer::Symbolizer() : start_hook_(0), end_hook_(0) {}
  49
  50 Symbolizer::SymbolizerScope::SymbolizerScope(const Symbolizer *sym)
  51     : sym_(sym) {
  52   if (sym_->start_hook_)
  53     sym_->start_hook_();
  54 }
  55
  56 Symbolizer::SymbolizerScope::~SymbolizerScope() {
  57   if (sym_->end_hook_)
  58     sym_->end_hook_();
  59 }
  60
  61 }  // namespace __sanitizer