| //===-- InstrumentationRuntimeASan.cpp ------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "InstrumentationRuntimeASan.h" |
| |
| #include "lldb/Breakpoint/StoppointCallbackContext.h" |
| #include "lldb/Core/Module.h" |
| #include "lldb/Core/PluginInterface.h" |
| #include "lldb/Core/PluginManager.h" |
| #include "lldb/Symbol/Symbol.h" |
| #include "lldb/Target/Process.h" |
| #include "lldb/Utility/RegularExpression.h" |
| |
| #include "Plugins/InstrumentationRuntime/Utility/ReportRetriever.h" |
| |
| using namespace lldb; |
| using namespace lldb_private; |
| |
| LLDB_PLUGIN_DEFINE(InstrumentationRuntimeASan) |
| |
| lldb::InstrumentationRuntimeSP |
| InstrumentationRuntimeASan::CreateInstance(const lldb::ProcessSP &process_sp) { |
| return InstrumentationRuntimeSP(new InstrumentationRuntimeASan(process_sp)); |
| } |
| |
| void InstrumentationRuntimeASan::Initialize() { |
| PluginManager::RegisterPlugin( |
| GetPluginNameStatic(), "AddressSanitizer instrumentation runtime plugin.", |
| CreateInstance, GetTypeStatic); |
| } |
| |
| void InstrumentationRuntimeASan::Terminate() { |
| PluginManager::UnregisterPlugin(CreateInstance); |
| } |
| |
| lldb::InstrumentationRuntimeType InstrumentationRuntimeASan::GetTypeStatic() { |
| return eInstrumentationRuntimeTypeAddressSanitizer; |
| } |
| |
| InstrumentationRuntimeASan::~InstrumentationRuntimeASan() { Deactivate(); } |
| |
| const RegularExpression & |
| InstrumentationRuntimeASan::GetPatternForRuntimeLibrary() { |
| // FIXME: This shouldn't include the "dylib" suffix. |
| static RegularExpression regex( |
| llvm::StringRef("libclang_rt.asan_(.*)_dynamic\\.dylib")); |
| return regex; |
| } |
| |
| bool InstrumentationRuntimeASan::CheckIfRuntimeIsValid( |
| const lldb::ModuleSP module_sp) { |
| const Symbol *symbol = module_sp->FindFirstSymbolWithNameAndType( |
| ConstString("__asan_get_alloc_stack"), lldb::eSymbolTypeAny); |
| |
| return symbol != nullptr; |
| } |
| |
| bool InstrumentationRuntimeASan::NotifyBreakpointHit( |
| void *baton, StoppointCallbackContext *context, user_id_t break_id, |
| user_id_t break_loc_id) { |
| assert(baton && "null baton"); |
| if (!baton) |
| return false; |
| |
| InstrumentationRuntimeASan *const instance = |
| static_cast<InstrumentationRuntimeASan *>(baton); |
| |
| ProcessSP process_sp = instance->GetProcessSP(); |
| |
| return ReportRetriever::NotifyBreakpointHit(process_sp, context, break_id, |
| break_loc_id); |
| } |
| |
| void InstrumentationRuntimeASan::Activate() { |
| if (IsActive()) |
| return; |
| |
| ProcessSP process_sp = GetProcessSP(); |
| if (!process_sp) |
| return; |
| |
| Breakpoint *breakpoint = ReportRetriever::SetupBreakpoint( |
| GetRuntimeModuleSP(), process_sp, ConstString("_ZN6__asanL7AsanDieEv")); |
| |
| if (!breakpoint) |
| return; |
| |
| const bool sync = false; |
| |
| breakpoint->SetCallback(InstrumentationRuntimeASan::NotifyBreakpointHit, this, |
| sync); |
| breakpoint->SetBreakpointKind("address-sanitizer-report"); |
| SetBreakpointID(breakpoint->GetID()); |
| |
| SetActive(true); |
| } |
| |
| void InstrumentationRuntimeASan::Deactivate() { |
| SetActive(false); |
| |
| if (GetBreakpointID() == LLDB_INVALID_BREAK_ID) |
| return; |
| |
| if (ProcessSP process_sp = GetProcessSP()) { |
| process_sp->GetTarget().RemoveBreakpointByID(GetBreakpointID()); |
| SetBreakpointID(LLDB_INVALID_BREAK_ID); |
| } |
| } |