135 lines
3.7 KiB
C++
135 lines
3.7 KiB
C++
//===-- sanitizer_symbolizer.cpp ------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file is shared between AddressSanitizer and ThreadSanitizer
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// run-time libraries.
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//===----------------------------------------------------------------------===//
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#include "sanitizer_allocator_internal.h"
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#include "sanitizer_platform.h"
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#include "sanitizer_internal_defs.h"
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#include "sanitizer_libc.h"
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#include "sanitizer_placement_new.h"
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#include "sanitizer_symbolizer_internal.h"
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namespace __sanitizer {
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AddressInfo::AddressInfo() {
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internal_memset(this, 0, sizeof(AddressInfo));
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function_offset = kUnknown;
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}
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void AddressInfo::Clear() {
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InternalFree(module);
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InternalFree(function);
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InternalFree(file);
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internal_memset(this, 0, sizeof(AddressInfo));
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function_offset = kUnknown;
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}
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void AddressInfo::FillModuleInfo(const char *mod_name, uptr mod_offset,
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ModuleArch mod_arch) {
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module = internal_strdup(mod_name);
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module_offset = mod_offset;
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module_arch = mod_arch;
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}
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SymbolizedStack::SymbolizedStack() : next(nullptr), info() {}
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SymbolizedStack *SymbolizedStack::New(uptr addr) {
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void *mem = InternalAlloc(sizeof(SymbolizedStack));
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SymbolizedStack *res = new(mem) SymbolizedStack();
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res->info.address = addr;
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return res;
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}
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void SymbolizedStack::ClearAll() {
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info.Clear();
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if (next)
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next->ClearAll();
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InternalFree(this);
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}
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DataInfo::DataInfo() {
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internal_memset(this, 0, sizeof(DataInfo));
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}
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void DataInfo::Clear() {
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InternalFree(module);
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InternalFree(file);
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InternalFree(name);
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internal_memset(this, 0, sizeof(DataInfo));
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}
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void FrameInfo::Clear() {
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InternalFree(module);
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for (LocalInfo &local : locals) {
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InternalFree(local.function_name);
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InternalFree(local.name);
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InternalFree(local.decl_file);
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}
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locals.clear();
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}
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Symbolizer *Symbolizer::symbolizer_;
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StaticSpinMutex Symbolizer::init_mu_;
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LowLevelAllocator Symbolizer::symbolizer_allocator_;
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void Symbolizer::InvalidateModuleList() {
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modules_fresh_ = false;
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}
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void Symbolizer::AddHooks(Symbolizer::StartSymbolizationHook start_hook,
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Symbolizer::EndSymbolizationHook end_hook) {
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CHECK(start_hook_ == 0 && end_hook_ == 0);
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start_hook_ = start_hook;
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end_hook_ = end_hook;
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}
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const char *Symbolizer::ModuleNameOwner::GetOwnedCopy(const char *str) {
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mu_->CheckLocked();
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// 'str' will be the same string multiple times in a row, optimize this case.
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if (last_match_ && !internal_strcmp(last_match_, str))
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return last_match_;
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// FIXME: this is linear search.
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// We should optimize this further if this turns out to be a bottleneck later.
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for (uptr i = 0; i < storage_.size(); ++i) {
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if (!internal_strcmp(storage_[i], str)) {
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last_match_ = storage_[i];
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return last_match_;
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}
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}
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last_match_ = internal_strdup(str);
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storage_.push_back(last_match_);
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return last_match_;
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}
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Symbolizer::Symbolizer(IntrusiveList<SymbolizerTool> tools)
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: module_names_(&mu_), modules_(), modules_fresh_(false), tools_(tools),
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start_hook_(0), end_hook_(0) {}
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Symbolizer::SymbolizerScope::SymbolizerScope(const Symbolizer *sym)
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: sym_(sym) {
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if (sym_->start_hook_)
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sym_->start_hook_();
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}
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Symbolizer::SymbolizerScope::~SymbolizerScope() {
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if (sym_->end_hook_)
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sym_->end_hook_();
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}
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void Symbolizer::LateInitializeTools() {
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for (auto &tool : tools_) {
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tool.LateInitialize();
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}
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}
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} // namespace __sanitizer
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