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 
GetOrNull()23 Symbolizer *Symbolizer::GetOrNull() {
24   SpinMutexLock l(&init_mu_);
25   return symbolizer_;
26 }
27 
Get()28 Symbolizer *Symbolizer::Get() {
29   SpinMutexLock l(&init_mu_);
30   RAW_CHECK_MSG(symbolizer_ != 0, "Using uninitialized symbolizer!");
31   return symbolizer_;
32 }
33 
Disable()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 
AddHooks(Symbolizer::StartSymbolizationHook start_hook,Symbolizer::EndSymbolizationHook end_hook)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 
Symbolizer()48 Symbolizer::Symbolizer() : start_hook_(0), end_hook_(0) {}
49 
SymbolizerScope(const Symbolizer * sym)50 Symbolizer::SymbolizerScope::SymbolizerScope(const Symbolizer *sym)
51     : sym_(sym) {
52   if (sym_->start_hook_)
53     sym_->start_hook_();
54 }
55 
~SymbolizerScope()56 Symbolizer::SymbolizerScope::~SymbolizerScope() {
57   if (sym_->end_hook_)
58     sym_->end_hook_();
59 }
60 
61 }  // namespace __sanitizer
62