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//===-- 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);
}
}
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