1//===-- sanitizer_symbolizer.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 shared between AddressSanitizer and ThreadSanitizer
11// run-time libraries.
12//===----------------------------------------------------------------------===//
13
14#include "sanitizer_platform.h"
15#include "sanitizer_internal_defs.h"
16#include "sanitizer_placement_new.h"
17#include "sanitizer_symbolizer.h"
18
19namespace __sanitizer {
20
21Symbolizer *Symbolizer::symbolizer_;
22StaticSpinMutex Symbolizer::init_mu_;
23LowLevelAllocator Symbolizer::symbolizer_allocator_;
24
25Symbolizer *Symbolizer::GetOrNull() {
26  SpinMutexLock l(&init_mu_);
27  return symbolizer_;
28}
29
30Symbolizer *Symbolizer::Get() {
31  SpinMutexLock l(&init_mu_);
32  RAW_CHECK_MSG(symbolizer_ != 0, "Using uninitialized symbolizer!");
33  return symbolizer_;
34}
35
36Symbolizer *Symbolizer::Disable() {
37  CHECK_EQ(0, symbolizer_);
38  // Initialize a dummy symbolizer.
39  symbolizer_ = new(symbolizer_allocator_) Symbolizer;
40  return symbolizer_;
41}
42
43void Symbolizer::AddHooks(Symbolizer::StartSymbolizationHook start_hook,
44                          Symbolizer::EndSymbolizationHook end_hook) {
45  CHECK(start_hook_ == 0 && end_hook_ == 0);
46  start_hook_ = start_hook;
47  end_hook_ = end_hook;
48}
49
50Symbolizer::Symbolizer() : start_hook_(0), end_hook_(0) {}
51
52Symbolizer::SymbolizerScope::SymbolizerScope(const Symbolizer *sym)
53    : sym_(sym) {
54  if (sym_->start_hook_)
55    sym_->start_hook_();
56}
57
58Symbolizer::SymbolizerScope::~SymbolizerScope() {
59  if (sym_->end_hook_)
60    sym_->end_hook_();
61}
62
63}  // namespace __sanitizer
64