1c1a1ed62228288155459d39194995a36aca4a8a6Peter Collingbourne//===-- sanitizer_symbolizer.cc -------------------------------------------===// 2c1a1ed62228288155459d39194995a36aca4a8a6Peter Collingbourne// 3c1a1ed62228288155459d39194995a36aca4a8a6Peter Collingbourne// The LLVM Compiler Infrastructure 4c1a1ed62228288155459d39194995a36aca4a8a6Peter Collingbourne// 5c1a1ed62228288155459d39194995a36aca4a8a6Peter Collingbourne// This file is distributed under the University of Illinois Open Source 6c1a1ed62228288155459d39194995a36aca4a8a6Peter Collingbourne// License. See LICENSE.TXT for details. 7c1a1ed62228288155459d39194995a36aca4a8a6Peter Collingbourne// 8c1a1ed62228288155459d39194995a36aca4a8a6Peter Collingbourne//===----------------------------------------------------------------------===// 9c1a1ed62228288155459d39194995a36aca4a8a6Peter Collingbourne// 10c1a1ed62228288155459d39194995a36aca4a8a6Peter Collingbourne// This file is shared between AddressSanitizer and ThreadSanitizer 11c1a1ed62228288155459d39194995a36aca4a8a6Peter Collingbourne// run-time libraries. 12c1a1ed62228288155459d39194995a36aca4a8a6Peter Collingbourne//===----------------------------------------------------------------------===// 13c1a1ed62228288155459d39194995a36aca4a8a6Peter Collingbourne 1486277eb844c4983c81de62d7c050e92fe7155788Stephen Hines#include "sanitizer_allocator_internal.h" 15c1a1ed62228288155459d39194995a36aca4a8a6Peter Collingbourne#include "sanitizer_platform.h" 16c1a1ed62228288155459d39194995a36aca4a8a6Peter Collingbourne#include "sanitizer_internal_defs.h" 1786277eb844c4983c81de62d7c050e92fe7155788Stephen Hines#include "sanitizer_libc.h" 18c1a1ed62228288155459d39194995a36aca4a8a6Peter Collingbourne#include "sanitizer_placement_new.h" 197c9150579ed0278492f51cc8434b1d63a44b9bd1Pirama Arumuga Nainar#include "sanitizer_symbolizer_internal.h" 20c1a1ed62228288155459d39194995a36aca4a8a6Peter Collingbourne 21c1a1ed62228288155459d39194995a36aca4a8a6Peter Collingbournenamespace __sanitizer { 22c1a1ed62228288155459d39194995a36aca4a8a6Peter Collingbourne 2386277eb844c4983c81de62d7c050e92fe7155788Stephen HinesAddressInfo::AddressInfo() { 2486277eb844c4983c81de62d7c050e92fe7155788Stephen Hines internal_memset(this, 0, sizeof(AddressInfo)); 2586277eb844c4983c81de62d7c050e92fe7155788Stephen Hines function_offset = kUnknown; 2686277eb844c4983c81de62d7c050e92fe7155788Stephen Hines} 2786277eb844c4983c81de62d7c050e92fe7155788Stephen Hines 2886277eb844c4983c81de62d7c050e92fe7155788Stephen Hinesvoid AddressInfo::Clear() { 2986277eb844c4983c81de62d7c050e92fe7155788Stephen Hines InternalFree(module); 3086277eb844c4983c81de62d7c050e92fe7155788Stephen Hines InternalFree(function); 3186277eb844c4983c81de62d7c050e92fe7155788Stephen Hines InternalFree(file); 3286277eb844c4983c81de62d7c050e92fe7155788Stephen Hines internal_memset(this, 0, sizeof(AddressInfo)); 3386277eb844c4983c81de62d7c050e92fe7155788Stephen Hines function_offset = kUnknown; 3486277eb844c4983c81de62d7c050e92fe7155788Stephen Hines} 3586277eb844c4983c81de62d7c050e92fe7155788Stephen Hines 367c9150579ed0278492f51cc8434b1d63a44b9bd1Pirama Arumuga Nainarvoid AddressInfo::FillModuleInfo(const char *mod_name, uptr mod_offset) { 3786277eb844c4983c81de62d7c050e92fe7155788Stephen Hines module = internal_strdup(mod_name); 3886277eb844c4983c81de62d7c050e92fe7155788Stephen Hines module_offset = mod_offset; 3986277eb844c4983c81de62d7c050e92fe7155788Stephen Hines} 4086277eb844c4983c81de62d7c050e92fe7155788Stephen Hines 4186277eb844c4983c81de62d7c050e92fe7155788Stephen HinesSymbolizedStack::SymbolizedStack() : next(nullptr), info() {} 4286277eb844c4983c81de62d7c050e92fe7155788Stephen Hines 4386277eb844c4983c81de62d7c050e92fe7155788Stephen HinesSymbolizedStack *SymbolizedStack::New(uptr addr) { 4486277eb844c4983c81de62d7c050e92fe7155788Stephen Hines void *mem = InternalAlloc(sizeof(SymbolizedStack)); 4586277eb844c4983c81de62d7c050e92fe7155788Stephen Hines SymbolizedStack *res = new(mem) SymbolizedStack(); 4686277eb844c4983c81de62d7c050e92fe7155788Stephen Hines res->info.address = addr; 4786277eb844c4983c81de62d7c050e92fe7155788Stephen Hines return res; 4886277eb844c4983c81de62d7c050e92fe7155788Stephen Hines} 4986277eb844c4983c81de62d7c050e92fe7155788Stephen Hines 5086277eb844c4983c81de62d7c050e92fe7155788Stephen Hinesvoid SymbolizedStack::ClearAll() { 5186277eb844c4983c81de62d7c050e92fe7155788Stephen Hines info.Clear(); 5286277eb844c4983c81de62d7c050e92fe7155788Stephen Hines if (next) 5386277eb844c4983c81de62d7c050e92fe7155788Stephen Hines next->ClearAll(); 5486277eb844c4983c81de62d7c050e92fe7155788Stephen Hines InternalFree(this); 5586277eb844c4983c81de62d7c050e92fe7155788Stephen Hines} 5686277eb844c4983c81de62d7c050e92fe7155788Stephen Hines 5786277eb844c4983c81de62d7c050e92fe7155788Stephen HinesDataInfo::DataInfo() { 5886277eb844c4983c81de62d7c050e92fe7155788Stephen Hines internal_memset(this, 0, sizeof(DataInfo)); 5986277eb844c4983c81de62d7c050e92fe7155788Stephen Hines} 6086277eb844c4983c81de62d7c050e92fe7155788Stephen Hines 6186277eb844c4983c81de62d7c050e92fe7155788Stephen Hinesvoid DataInfo::Clear() { 6286277eb844c4983c81de62d7c050e92fe7155788Stephen Hines InternalFree(module); 6386277eb844c4983c81de62d7c050e92fe7155788Stephen Hines InternalFree(name); 6486277eb844c4983c81de62d7c050e92fe7155788Stephen Hines internal_memset(this, 0, sizeof(DataInfo)); 6586277eb844c4983c81de62d7c050e92fe7155788Stephen Hines} 6686277eb844c4983c81de62d7c050e92fe7155788Stephen Hines 67e00495aa0f3b114c7b764769d9450e5d2efb8e64Alexey SamsonovSymbolizer *Symbolizer::symbolizer_; 68e00495aa0f3b114c7b764769d9450e5d2efb8e64Alexey SamsonovStaticSpinMutex Symbolizer::init_mu_; 69c1a1ed62228288155459d39194995a36aca4a8a6Peter CollingbourneLowLevelAllocator Symbolizer::symbolizer_allocator_; 70c1a1ed62228288155459d39194995a36aca4a8a6Peter Collingbourne 7166d91e3356a0c4d7aff3beaaaff3e87bbaec805cAlexey Samsonovvoid Symbolizer::AddHooks(Symbolizer::StartSymbolizationHook start_hook, 7266d91e3356a0c4d7aff3beaaaff3e87bbaec805cAlexey Samsonov Symbolizer::EndSymbolizationHook end_hook) { 7366d91e3356a0c4d7aff3beaaaff3e87bbaec805cAlexey Samsonov CHECK(start_hook_ == 0 && end_hook_ == 0); 7466d91e3356a0c4d7aff3beaaaff3e87bbaec805cAlexey Samsonov start_hook_ = start_hook; 7566d91e3356a0c4d7aff3beaaaff3e87bbaec805cAlexey Samsonov end_hook_ = end_hook; 7666d91e3356a0c4d7aff3beaaaff3e87bbaec805cAlexey Samsonov} 7766d91e3356a0c4d7aff3beaaaff3e87bbaec805cAlexey Samsonov 78259f7063e3e4c4b94dded1e90ab0a943d0fa737bPirama Arumuga Nainarconst char *Symbolizer::ModuleNameOwner::GetOwnedCopy(const char *str) { 79259f7063e3e4c4b94dded1e90ab0a943d0fa737bPirama Arumuga Nainar mu_->CheckLocked(); 80259f7063e3e4c4b94dded1e90ab0a943d0fa737bPirama Arumuga Nainar 81259f7063e3e4c4b94dded1e90ab0a943d0fa737bPirama Arumuga Nainar // 'str' will be the same string multiple times in a row, optimize this case. 82259f7063e3e4c4b94dded1e90ab0a943d0fa737bPirama Arumuga Nainar if (last_match_ && !internal_strcmp(last_match_, str)) 83259f7063e3e4c4b94dded1e90ab0a943d0fa737bPirama Arumuga Nainar return last_match_; 84259f7063e3e4c4b94dded1e90ab0a943d0fa737bPirama Arumuga Nainar 85259f7063e3e4c4b94dded1e90ab0a943d0fa737bPirama Arumuga Nainar // FIXME: this is linear search. 86259f7063e3e4c4b94dded1e90ab0a943d0fa737bPirama Arumuga Nainar // We should optimize this further if this turns out to be a bottleneck later. 87259f7063e3e4c4b94dded1e90ab0a943d0fa737bPirama Arumuga Nainar for (uptr i = 0; i < storage_.size(); ++i) { 88259f7063e3e4c4b94dded1e90ab0a943d0fa737bPirama Arumuga Nainar if (!internal_strcmp(storage_[i], str)) { 89259f7063e3e4c4b94dded1e90ab0a943d0fa737bPirama Arumuga Nainar last_match_ = storage_[i]; 90259f7063e3e4c4b94dded1e90ab0a943d0fa737bPirama Arumuga Nainar return last_match_; 91259f7063e3e4c4b94dded1e90ab0a943d0fa737bPirama Arumuga Nainar } 92259f7063e3e4c4b94dded1e90ab0a943d0fa737bPirama Arumuga Nainar } 93259f7063e3e4c4b94dded1e90ab0a943d0fa737bPirama Arumuga Nainar last_match_ = internal_strdup(str); 94259f7063e3e4c4b94dded1e90ab0a943d0fa737bPirama Arumuga Nainar storage_.push_back(last_match_); 95259f7063e3e4c4b94dded1e90ab0a943d0fa737bPirama Arumuga Nainar return last_match_; 96259f7063e3e4c4b94dded1e90ab0a943d0fa737bPirama Arumuga Nainar} 97259f7063e3e4c4b94dded1e90ab0a943d0fa737bPirama Arumuga Nainar 987c9150579ed0278492f51cc8434b1d63a44b9bd1Pirama Arumuga NainarSymbolizer::Symbolizer(IntrusiveList<SymbolizerTool> tools) 99259f7063e3e4c4b94dded1e90ab0a943d0fa737bPirama Arumuga Nainar : module_names_(&mu_), n_modules_(0), modules_fresh_(false), tools_(tools), 100259f7063e3e4c4b94dded1e90ab0a943d0fa737bPirama Arumuga Nainar start_hook_(0), end_hook_(0) {} 10166d91e3356a0c4d7aff3beaaaff3e87bbaec805cAlexey Samsonov 10266d91e3356a0c4d7aff3beaaaff3e87bbaec805cAlexey SamsonovSymbolizer::SymbolizerScope::SymbolizerScope(const Symbolizer *sym) 10366d91e3356a0c4d7aff3beaaaff3e87bbaec805cAlexey Samsonov : sym_(sym) { 10466d91e3356a0c4d7aff3beaaaff3e87bbaec805cAlexey Samsonov if (sym_->start_hook_) 10566d91e3356a0c4d7aff3beaaaff3e87bbaec805cAlexey Samsonov sym_->start_hook_(); 10666d91e3356a0c4d7aff3beaaaff3e87bbaec805cAlexey Samsonov} 10766d91e3356a0c4d7aff3beaaaff3e87bbaec805cAlexey Samsonov 10866d91e3356a0c4d7aff3beaaaff3e87bbaec805cAlexey SamsonovSymbolizer::SymbolizerScope::~SymbolizerScope() { 10966d91e3356a0c4d7aff3beaaaff3e87bbaec805cAlexey Samsonov if (sym_->end_hook_) 11066d91e3356a0c4d7aff3beaaaff3e87bbaec805cAlexey Samsonov sym_->end_hook_(); 11166d91e3356a0c4d7aff3beaaaff3e87bbaec805cAlexey Samsonov} 11266d91e3356a0c4d7aff3beaaaff3e87bbaec805cAlexey Samsonov 113c1a1ed62228288155459d39194995a36aca4a8a6Peter Collingbourne} // namespace __sanitizer 114