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_allocator_internal.h" 13 #include "sanitizer_platform.h" 14 #include "sanitizer_internal_defs.h" 15 #include "sanitizer_libc.h" 16 #include "sanitizer_placement_new.h" 17 #include "sanitizer_symbolizer_internal.h" 18 19 namespace __sanitizer { 20 21 AddressInfo::AddressInfo() { 22 internal_memset(this, 0, sizeof(AddressInfo)); 23 function_offset = kUnknown; 24 } 25 26 void AddressInfo::Clear() { 27 InternalFree(module); 28 InternalFree(function); 29 InternalFree(file); 30 internal_memset(this, 0, sizeof(AddressInfo)); 31 function_offset = kUnknown; 32 } 33 34 void AddressInfo::FillModuleInfo(const char *mod_name, uptr mod_offset, 35 ModuleArch mod_arch) { 36 module = internal_strdup(mod_name); 37 module_offset = mod_offset; 38 module_arch = mod_arch; 39 } 40 41 SymbolizedStack::SymbolizedStack() : next(nullptr), info() {} 42 43 SymbolizedStack *SymbolizedStack::New(uptr addr) { 44 void *mem = InternalAlloc(sizeof(SymbolizedStack)); 45 SymbolizedStack *res = new(mem) SymbolizedStack(); 46 res->info.address = addr; 47 return res; 48 } 49 50 void SymbolizedStack::ClearAll() { 51 info.Clear(); 52 if (next) 53 next->ClearAll(); 54 InternalFree(this); 55 } 56 57 DataInfo::DataInfo() { 58 internal_memset(this, 0, sizeof(DataInfo)); 59 } 60 61 void DataInfo::Clear() { 62 InternalFree(module); 63 InternalFree(file); 64 InternalFree(name); 65 internal_memset(this, 0, sizeof(DataInfo)); 66 } 67 68 Symbolizer *Symbolizer::symbolizer_; 69 StaticSpinMutex Symbolizer::init_mu_; 70 LowLevelAllocator Symbolizer::symbolizer_allocator_; 71 72 void Symbolizer::InvalidateModuleList() { 73 modules_fresh_ = false; 74 } 75 76 void Symbolizer::AddHooks(Symbolizer::StartSymbolizationHook start_hook, 77 Symbolizer::EndSymbolizationHook end_hook) { 78 CHECK(start_hook_ == 0 && end_hook_ == 0); 79 start_hook_ = start_hook; 80 end_hook_ = end_hook; 81 } 82 83 const char *Symbolizer::ModuleNameOwner::GetOwnedCopy(const char *str) { 84 mu_->CheckLocked(); 85 86 // 'str' will be the same string multiple times in a row, optimize this case. 87 if (last_match_ && !internal_strcmp(last_match_, str)) 88 return last_match_; 89 90 // FIXME: this is linear search. 91 // We should optimize this further if this turns out to be a bottleneck later. 92 for (uptr i = 0; i < storage_.size(); ++i) { 93 if (!internal_strcmp(storage_[i], str)) { 94 last_match_ = storage_[i]; 95 return last_match_; 96 } 97 } 98 last_match_ = internal_strdup(str); 99 storage_.push_back(last_match_); 100 return last_match_; 101 } 102 103 Symbolizer::Symbolizer(IntrusiveList<SymbolizerTool> tools) 104 : module_names_(&mu_), modules_(), modules_fresh_(false), tools_(tools), 105 start_hook_(0), end_hook_(0) {} 106 107 Symbolizer::SymbolizerScope::SymbolizerScope(const Symbolizer *sym) 108 : sym_(sym) { 109 if (sym_->start_hook_) 110 sym_->start_hook_(); 111 } 112 113 Symbolizer::SymbolizerScope::~SymbolizerScope() { 114 if (sym_->end_hook_) 115 sym_->end_hook_(); 116 } 117 118 } // namespace __sanitizer 119