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_allocator_internal.h" 15 #include "sanitizer_platform.h" 16 #include "sanitizer_internal_defs.h" 17 #include "sanitizer_libc.h" 18 #include "sanitizer_placement_new.h" 19 #include "sanitizer_symbolizer_internal.h" 20 21 namespace __sanitizer { 22 23 AddressInfo::AddressInfo() { 24 internal_memset(this, 0, sizeof(AddressInfo)); 25 function_offset = kUnknown; 26 } 27 28 void AddressInfo::Clear() { 29 InternalFree(module); 30 InternalFree(function); 31 InternalFree(file); 32 internal_memset(this, 0, sizeof(AddressInfo)); 33 function_offset = kUnknown; 34 } 35 36 void AddressInfo::FillModuleInfo(const char *mod_name, uptr mod_offset) { 37 module = internal_strdup(mod_name); 38 module_offset = mod_offset; 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(name); 64 internal_memset(this, 0, sizeof(DataInfo)); 65 } 66 67 Symbolizer *Symbolizer::symbolizer_; 68 StaticSpinMutex Symbolizer::init_mu_; 69 LowLevelAllocator Symbolizer::symbolizer_allocator_; 70 71 void Symbolizer::AddHooks(Symbolizer::StartSymbolizationHook start_hook, 72 Symbolizer::EndSymbolizationHook end_hook) { 73 CHECK(start_hook_ == 0 && end_hook_ == 0); 74 start_hook_ = start_hook; 75 end_hook_ = end_hook; 76 } 77 78 const char *Symbolizer::ModuleNameOwner::GetOwnedCopy(const char *str) { 79 mu_->CheckLocked(); 80 81 // 'str' will be the same string multiple times in a row, optimize this case. 82 if (last_match_ && !internal_strcmp(last_match_, str)) 83 return last_match_; 84 85 // FIXME: this is linear search. 86 // We should optimize this further if this turns out to be a bottleneck later. 87 for (uptr i = 0; i < storage_.size(); ++i) { 88 if (!internal_strcmp(storage_[i], str)) { 89 last_match_ = storage_[i]; 90 return last_match_; 91 } 92 } 93 last_match_ = internal_strdup(str); 94 storage_.push_back(last_match_); 95 return last_match_; 96 } 97 98 Symbolizer::Symbolizer(IntrusiveList<SymbolizerTool> tools) 99 : module_names_(&mu_), n_modules_(0), modules_fresh_(false), tools_(tools), 100 start_hook_(0), end_hook_(0) {} 101 102 Symbolizer::SymbolizerScope::SymbolizerScope(const Symbolizer *sym) 103 : sym_(sym) { 104 if (sym_->start_hook_) 105 sym_->start_hook_(); 106 } 107 108 Symbolizer::SymbolizerScope::~SymbolizerScope() { 109 if (sym_->end_hook_) 110 sym_->end_hook_(); 111 } 112 113 } // namespace __sanitizer 114
