Add ThreadSanitizer debugging support.
This patch adds ThreadSanitizer support into LLDB:
- Adding a new InstrumentationRuntime plugin, ThreadSanitizerRuntime, in the same way ASan is implemented.
- A breakpoint stops in `__tsan_on_report`, then we extract all sorts of information by evaluating an expression. We then populate this into StopReasonExtendedInfo.
- SBThread gets a new API, SBThread::GetStopReasonExtendedBacktraces(), which returns TSan’s backtraces in the form of regular SBThreads. Non-TSan stop reasons return an empty collection.
- Added some test cases.
Reviewed by Greg Clayton.
llvm-svn: 264162
diff --git a/lldb/source/Plugins/InstrumentationRuntime/ThreadSanitizer/ThreadSanitizerRuntime.cpp b/lldb/source/Plugins/InstrumentationRuntime/ThreadSanitizer/ThreadSanitizerRuntime.cpp
new file mode 100644
index 0000000..c6ee6af
--- /dev/null
+++ b/lldb/source/Plugins/InstrumentationRuntime/ThreadSanitizer/ThreadSanitizerRuntime.cpp
@@ -0,0 +1,538 @@
+//===-- ThreadSanitizerRuntime.cpp ------------------------------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "ThreadSanitizerRuntime.h"
+
+#include "lldb/Breakpoint/StoppointCallbackContext.h"
+#include "lldb/Core/Debugger.h"
+#include "lldb/Core/Module.h"
+#include "lldb/Core/ModuleList.h"
+#include "lldb/Core/RegularExpression.h"
+#include "lldb/Core/PluginInterface.h"
+#include "lldb/Core/PluginManager.h"
+#include "lldb/Core/Stream.h"
+#include "lldb/Core/StreamFile.h"
+#include "lldb/Core/ValueObject.h"
+#include "lldb/Expression/UserExpression.h"
+#include "lldb/Interpreter/CommandReturnObject.h"
+#include "lldb/Symbol/Symbol.h"
+#include "lldb/Symbol/SymbolContext.h"
+#include "lldb/Target/InstrumentationRuntimeStopInfo.h"
+#include "lldb/Target/StopInfo.h"
+#include "lldb/Target/Target.h"
+#include "lldb/Target/Thread.h"
+
+using namespace lldb;
+using namespace lldb_private;
+
+lldb::InstrumentationRuntimeSP
+ThreadSanitizerRuntime::CreateInstance (const lldb::ProcessSP &process_sp)
+{
+ return InstrumentationRuntimeSP(new ThreadSanitizerRuntime(process_sp));
+}
+
+void
+ThreadSanitizerRuntime::Initialize()
+{
+ PluginManager::RegisterPlugin (GetPluginNameStatic(),
+ "ThreadSanitizer instrumentation runtime plugin.",
+ CreateInstance,
+ GetTypeStatic);
+}
+
+void
+ThreadSanitizerRuntime::Terminate()
+{
+ PluginManager::UnregisterPlugin (CreateInstance);
+}
+
+lldb_private::ConstString
+ThreadSanitizerRuntime::GetPluginNameStatic()
+{
+ return ConstString("ThreadSanitizer");
+}
+
+lldb::InstrumentationRuntimeType
+ThreadSanitizerRuntime::GetTypeStatic()
+{
+ return eInstrumentationRuntimeTypeThreadSanitizer;
+}
+
+ThreadSanitizerRuntime::ThreadSanitizerRuntime(const ProcessSP &process_sp) :
+m_is_active(false),
+m_runtime_module_wp(),
+m_process_wp(),
+m_breakpoint_id(0)
+{
+ if (process_sp)
+ m_process_wp = process_sp;
+}
+
+ThreadSanitizerRuntime::~ThreadSanitizerRuntime()
+{
+ Deactivate();
+}
+
+static bool
+ModuleContainsTSanRuntime(ModuleSP module_sp)
+{
+ static ConstString g_tsan_get_current_report("__tsan_get_current_report");
+ const Symbol* symbol = module_sp->FindFirstSymbolWithNameAndType(g_tsan_get_current_report, lldb::eSymbolTypeAny);
+ return symbol != nullptr;
+}
+
+void
+ThreadSanitizerRuntime::ModulesDidLoad(lldb_private::ModuleList &module_list)
+{
+ if (IsActive())
+ return;
+
+ if (GetRuntimeModuleSP()) {
+ Activate();
+ return;
+ }
+
+ module_list.ForEach ([this](const lldb::ModuleSP module_sp) -> bool
+ {
+ const FileSpec & file_spec = module_sp->GetFileSpec();
+ if (! file_spec)
+ return true; // Keep iterating through modules
+
+ llvm::StringRef module_basename(file_spec.GetFilename().GetStringRef());
+ if (module_sp->IsExecutable() || module_basename.startswith("libclang_rt.tsan_"))
+ {
+ if (ModuleContainsTSanRuntime(module_sp))
+ {
+ m_runtime_module_wp = module_sp;
+ Activate();
+ return false; // Stop iterating
+ }
+ }
+
+ return true; // Keep iterating through modules
+ });
+}
+
+bool
+ThreadSanitizerRuntime::IsActive()
+{
+ return m_is_active;
+}
+
+#define RETRIEVE_REPORT_DATA_FUNCTION_TIMEOUT_USEC 2*1000*1000
+
+const char *
+thread_sanitizer_retrieve_report_data_prefix = R"(
+extern "C"
+{
+ void *__tsan_get_current_report();
+ int __tsan_get_report_data(void *report, const char **description, int *count,
+ int *stack_count, int *mop_count, int *loc_count,
+ int *mutex_count, int *thread_count,
+ int *unique_tid_count, void **sleep_trace,
+ unsigned long trace_size);
+ int __tsan_get_report_stack(void *report, unsigned long idx, void **trace,
+ unsigned long trace_size);
+ int __tsan_get_report_mop(void *report, unsigned long idx, int *tid, void **addr,
+ int *size, int *write, int *atomic, void **trace,
+ unsigned long trace_size);
+ int __tsan_get_report_loc(void *report, unsigned long idx, const char **type,
+ void **addr, unsigned long *start, unsigned long *size, int *tid,
+ int *fd, int *suppressable, void **trace,
+ unsigned long trace_size);
+ int __tsan_get_report_mutex(void *report, unsigned long idx, unsigned long *mutex_id, void **addr,
+ int *destroyed, void **trace, unsigned long trace_size);
+ int __tsan_get_report_thread(void *report, unsigned long idx, int *tid, unsigned long *pid,
+ int *running, const char **name, int *parent_tid,
+ void **trace, unsigned long trace_size);
+ int __tsan_get_report_unique_tid(void *report, unsigned long idx, int *tid);
+}
+
+const int REPORT_TRACE_SIZE = 128;
+const int REPORT_ARRAY_SIZE = 4;
+
+struct data {
+ void *report;
+ const char *description;
+ int report_count;
+
+ void *sleep_trace[REPORT_TRACE_SIZE];
+
+ int stack_count;
+ struct {
+ int idx;
+ void *trace[REPORT_TRACE_SIZE];
+ } stacks[REPORT_ARRAY_SIZE];
+
+ int mop_count;
+ struct {
+ int idx;
+ int tid;
+ int size;
+ int write;
+ int atomic;
+ void *addr;
+ void *trace[REPORT_TRACE_SIZE];
+ } mops[REPORT_ARRAY_SIZE];
+
+ int loc_count;
+ struct {
+ int idx;
+ const char *type;
+ void *addr;
+ unsigned long start;
+ unsigned long size;
+ int tid;
+ int fd;
+ int suppressable;
+ void *trace[REPORT_TRACE_SIZE];
+ } locs[REPORT_ARRAY_SIZE];
+
+ int mutex_count;
+ struct {
+ int idx;
+ unsigned long mutex_id;
+ void *addr;
+ int destroyed;
+ void *trace[REPORT_TRACE_SIZE];
+ } mutexes[REPORT_ARRAY_SIZE];
+
+ int thread_count;
+ struct {
+ int idx;
+ int tid;
+ unsigned long pid;
+ int running;
+ const char *name;
+ int parent_tid;
+ void *trace[REPORT_TRACE_SIZE];
+ } threads[REPORT_ARRAY_SIZE];
+
+ int unique_tid_count;
+ struct {
+ int idx;
+ int tid;
+ } unique_tids[REPORT_ARRAY_SIZE];
+};
+)";
+
+const char *
+thread_sanitizer_retrieve_report_data_command = R"(
+data t = {0};
+
+t.report = __tsan_get_current_report();
+__tsan_get_report_data(t.report, &t.description, &t.report_count, &t.stack_count, &t.mop_count, &t.loc_count, &t.mutex_count, &t.thread_count, &t.unique_tid_count, t.sleep_trace, REPORT_TRACE_SIZE);
+
+if (t.stack_count > REPORT_ARRAY_SIZE) t.stack_count = REPORT_ARRAY_SIZE;
+for (int i = 0; i < t.stack_count; i++) {
+ t.stacks[i].idx = i;
+ __tsan_get_report_stack(t.report, i, t.stacks[i].trace, REPORT_TRACE_SIZE);
+}
+
+if (t.mop_count > REPORT_ARRAY_SIZE) t.mop_count = REPORT_ARRAY_SIZE;
+for (int i = 0; i < t.mop_count; i++) {
+ t.mops[i].idx = i;
+ __tsan_get_report_mop(t.report, i, &t.mops[i].tid, &t.mops[i].addr, &t.mops[i].size, &t.mops[i].write, &t.mops[i].atomic, t.mops[i].trace, REPORT_TRACE_SIZE);
+}
+
+if (t.loc_count > REPORT_ARRAY_SIZE) t.loc_count = REPORT_ARRAY_SIZE;
+for (int i = 0; i < t.loc_count; i++) {
+ t.locs[i].idx = i;
+ __tsan_get_report_loc(t.report, i, &t.locs[i].type, &t.locs[i].addr, &t.locs[i].start, &t.locs[i].size, &t.locs[i].tid, &t.locs[i].fd, &t.locs[i].suppressable, t.locs[i].trace, REPORT_TRACE_SIZE);
+}
+
+if (t.mutex_count > REPORT_ARRAY_SIZE) t.mutex_count = REPORT_ARRAY_SIZE;
+for (int i = 0; i < t.mutex_count; i++) {
+ t.mutexes[i].idx = i;
+ __tsan_get_report_mutex(t.report, i, &t.mutexes[i].mutex_id, &t.mutexes[i].addr, &t.mutexes[i].destroyed, t.mutexes[i].trace, REPORT_TRACE_SIZE);
+}
+
+if (t.thread_count > REPORT_ARRAY_SIZE) t.thread_count = REPORT_ARRAY_SIZE;
+for (int i = 0; i < t.thread_count; i++) {
+ t.threads[i].idx = i;
+ __tsan_get_report_thread(t.report, i, &t.threads[i].tid, &t.threads[i].pid, &t.threads[i].running, &t.threads[i].name, &t.threads[i].parent_tid, t.threads[i].trace, REPORT_TRACE_SIZE);
+}
+
+if (t.unique_tid_count > REPORT_ARRAY_SIZE) t.unique_tid_count = REPORT_ARRAY_SIZE;
+for (int i = 0; i < t.unique_tid_count; i++) {
+ t.unique_tids[i].idx = i;
+ __tsan_get_report_unique_tid(t.report, i, &t.unique_tids[i].tid);
+}
+
+t;
+)";
+
+static StructuredData::Array *
+CreateStackTrace(ValueObjectSP o, std::string trace_item_name = ".trace") {
+ StructuredData::Array *trace = new StructuredData::Array();
+ ValueObjectSP trace_value_object = o->GetValueForExpressionPath(trace_item_name.c_str());
+ for (int j = 0; j < 8; j++) {
+ addr_t trace_addr = trace_value_object->GetChildAtIndex(j, true)->GetValueAsUnsigned(0);
+ if (trace_addr == 0)
+ break;
+ trace->AddItem(StructuredData::ObjectSP(new StructuredData::Integer(trace_addr)));
+ }
+ return trace;
+}
+
+static StructuredData::Array *
+ConvertToStructuredArray(ValueObjectSP return_value_sp, std::string items_name, std::string count_name, std::function <void(ValueObjectSP o, StructuredData::Dictionary *dict)> const &callback)
+{
+ StructuredData::Array *array = new StructuredData::Array();
+ unsigned int count = return_value_sp->GetValueForExpressionPath(count_name.c_str())->GetValueAsUnsigned(0);
+ ValueObjectSP objects = return_value_sp->GetValueForExpressionPath(items_name.c_str());
+ for (int i = 0; i < count; i++) {
+ ValueObjectSP o = objects->GetChildAtIndex(i, true);
+ StructuredData::Dictionary *dict = new StructuredData::Dictionary();
+
+ callback(o, dict);
+
+ array->AddItem(StructuredData::ObjectSP(dict));
+ }
+ return array;
+}
+
+static std::string
+RetrieveString(ValueObjectSP return_value_sp, ProcessSP process_sp, std::string expression_path)
+{
+ addr_t ptr = return_value_sp->GetValueForExpressionPath(expression_path.c_str())->GetValueAsUnsigned(0);
+ std::string str;
+ Error error;
+ process_sp->ReadCStringFromMemory(ptr, str, error);
+ return str;
+}
+
+StructuredData::ObjectSP
+ThreadSanitizerRuntime::RetrieveReportData(ExecutionContextRef exe_ctx_ref)
+{
+ ProcessSP process_sp = GetProcessSP();
+ if (!process_sp)
+ return StructuredData::ObjectSP();
+
+ ThreadSP thread_sp = exe_ctx_ref.GetThreadSP();
+ StackFrameSP frame_sp = thread_sp->GetSelectedFrame();
+
+ if (!frame_sp)
+ return StructuredData::ObjectSP();
+
+ EvaluateExpressionOptions options;
+ options.SetUnwindOnError(true);
+ options.SetTryAllThreads(true);
+ options.SetStopOthers(true);
+ options.SetIgnoreBreakpoints(true);
+ options.SetTimeoutUsec(RETRIEVE_REPORT_DATA_FUNCTION_TIMEOUT_USEC);
+ options.SetPrefix(thread_sanitizer_retrieve_report_data_prefix);
+
+ ValueObjectSP main_value;
+ ExecutionContext exe_ctx;
+ Error eval_error;
+ frame_sp->CalculateExecutionContext(exe_ctx);
+ ExpressionResults result = UserExpression::Evaluate (exe_ctx,
+ options,
+ thread_sanitizer_retrieve_report_data_command,
+ "",
+ main_value,
+ eval_error);
+ if (result != eExpressionCompleted) {
+ process_sp->GetTarget().GetDebugger().GetAsyncOutputStream()->Printf("Warning: Cannot evaluate ThreadSanitizer expression:\n%s\n", eval_error.AsCString());
+ return StructuredData::ObjectSP();
+ }
+
+ StructuredData::Dictionary *dict = new StructuredData::Dictionary();
+ dict->AddStringItem("instrumentation_class", "ThreadSanitizer");
+ dict->AddStringItem("description", RetrieveString(main_value, process_sp, ".description"));
+ dict->AddIntegerItem("report_count", main_value->GetValueForExpressionPath(".report_count")->GetValueAsUnsigned(0));
+ dict->AddItem("sleep_trace", StructuredData::ObjectSP(CreateStackTrace(main_value, ".sleep_trace")));
+
+ StructuredData::Array *stacks = ConvertToStructuredArray(main_value, ".stacks", ".stack_count", [] (ValueObjectSP o, StructuredData::Dictionary *dict) {
+ dict->AddIntegerItem("index", o->GetValueForExpressionPath(".idx")->GetValueAsUnsigned(0));
+ dict->AddItem("trace", StructuredData::ObjectSP(CreateStackTrace(o)));
+ });
+ dict->AddItem("stacks", StructuredData::ObjectSP(stacks));
+
+ StructuredData::Array *mops = ConvertToStructuredArray(main_value, ".mops", ".mop_count", [] (ValueObjectSP o, StructuredData::Dictionary *dict) {
+ dict->AddIntegerItem("index", o->GetValueForExpressionPath(".idx")->GetValueAsUnsigned(0));
+ dict->AddIntegerItem("thread_id", o->GetValueForExpressionPath(".tid")->GetValueAsUnsigned(0));
+ dict->AddIntegerItem("size", o->GetValueForExpressionPath(".size")->GetValueAsUnsigned(0));
+ dict->AddBooleanItem("is_write", o->GetValueForExpressionPath(".write")->GetValueAsUnsigned(0));
+ dict->AddBooleanItem("is_atomic", o->GetValueForExpressionPath(".atomic")->GetValueAsUnsigned(0));
+ dict->AddIntegerItem("address", o->GetValueForExpressionPath(".addr")->GetValueAsUnsigned(0));
+ dict->AddItem("trace", StructuredData::ObjectSP(CreateStackTrace(o)));
+ });
+ dict->AddItem("mops", StructuredData::ObjectSP(mops));
+
+ StructuredData::Array *locs = ConvertToStructuredArray(main_value, ".locs", ".loc_count", [process_sp] (ValueObjectSP o, StructuredData::Dictionary *dict) {
+ dict->AddIntegerItem("index", o->GetValueForExpressionPath(".idx")->GetValueAsUnsigned(0));
+ dict->AddStringItem("type", RetrieveString(o, process_sp, ".type"));
+ dict->AddIntegerItem("address", o->GetValueForExpressionPath(".addr")->GetValueAsUnsigned(0));
+ dict->AddIntegerItem("start", o->GetValueForExpressionPath(".start")->GetValueAsUnsigned(0));
+ dict->AddIntegerItem("size", o->GetValueForExpressionPath(".size")->GetValueAsUnsigned(0));
+ dict->AddIntegerItem("thread_id", o->GetValueForExpressionPath(".tid")->GetValueAsUnsigned(0));
+ dict->AddIntegerItem("file_descriptor", o->GetValueForExpressionPath(".fd")->GetValueAsUnsigned(0));
+ dict->AddIntegerItem("suppressable", o->GetValueForExpressionPath(".suppressable")->GetValueAsUnsigned(0));
+ dict->AddItem("trace", StructuredData::ObjectSP(CreateStackTrace(o)));
+ });
+ dict->AddItem("locs", StructuredData::ObjectSP(locs));
+
+ StructuredData::Array *mutexes = ConvertToStructuredArray(main_value, ".mutexes", ".mutex_count", [] (ValueObjectSP o, StructuredData::Dictionary *dict) {
+ dict->AddIntegerItem("index", o->GetValueForExpressionPath(".idx")->GetValueAsUnsigned(0));
+ dict->AddIntegerItem("mutex_id", o->GetValueForExpressionPath(".mutex_id")->GetValueAsUnsigned(0));
+ dict->AddIntegerItem("address", o->GetValueForExpressionPath(".addr")->GetValueAsUnsigned(0));
+ dict->AddIntegerItem("destroyed", o->GetValueForExpressionPath(".destroyed")->GetValueAsUnsigned(0));
+ dict->AddItem("trace", StructuredData::ObjectSP(CreateStackTrace(o)));
+ });
+ dict->AddItem("mutexes", StructuredData::ObjectSP(mutexes));
+
+ StructuredData::Array *threads = ConvertToStructuredArray(main_value, ".threads", ".thread_count", [process_sp] (ValueObjectSP o, StructuredData::Dictionary *dict) {
+ dict->AddIntegerItem("index", o->GetValueForExpressionPath(".idx")->GetValueAsUnsigned(0));
+ dict->AddIntegerItem("thread_id", o->GetValueForExpressionPath(".tid")->GetValueAsUnsigned(0));
+ dict->AddIntegerItem("process_id", o->GetValueForExpressionPath(".pid")->GetValueAsUnsigned(0));
+ dict->AddIntegerItem("running", o->GetValueForExpressionPath(".running")->GetValueAsUnsigned(0));
+ dict->AddStringItem("name", RetrieveString(o, process_sp, ".name"));
+ dict->AddIntegerItem("parent_thread_id", o->GetValueForExpressionPath(".parent_tid")->GetValueAsUnsigned(0));
+ dict->AddItem("trace", StructuredData::ObjectSP(CreateStackTrace(o)));
+ });
+ dict->AddItem("threads", StructuredData::ObjectSP(threads));
+
+ StructuredData::Array *unique_tids = ConvertToStructuredArray(main_value, ".unique_tids", ".unique_tid_count", [] (ValueObjectSP o, StructuredData::Dictionary *dict) {
+ dict->AddIntegerItem("index", o->GetValueForExpressionPath(".idx")->GetValueAsUnsigned(0));
+ dict->AddIntegerItem("tid", o->GetValueForExpressionPath(".tid")->GetValueAsUnsigned(0));
+ });
+ dict->AddItem("unique_tids", StructuredData::ObjectSP(unique_tids));
+
+ return StructuredData::ObjectSP(dict);
+}
+
+std::string
+ThreadSanitizerRuntime::FormatDescription(StructuredData::ObjectSP report)
+{
+ std::string description = report->GetAsDictionary()->GetValueForKey("description")->GetAsString()->GetValue();
+
+ if (description == "data-race") {
+ return "Data race detected";
+ } else if (description == "data-race-vptr") {
+ return "Data race on C++ virtual pointer detected";
+ } else if (description == "heap-use-after-free") {
+ return "Use of deallocated memory detected";
+ } else if (description == "heap-use-after-free-vptr") {
+ return "Use of deallocated C++ virtual pointer detected";
+ } else if (description == "thread-leak") {
+ return "Thread leak detected";
+ } else if (description == "locked-mutex-destroy") {
+ return "Destruction of a locked mutex detected";
+ } else if (description == "mutex-double-lock") {
+ return "Double lock of a mutex detected";
+ } else if (description == "mutex-invalid-access") {
+ return "Use of an invalid mutex (e.g. uninitialized or destroyed) detected";
+ } else if (description == "mutex-bad-unlock") {
+ return "Unlock of an unlocked mutex (or by a wrong thread) detected";
+ } else if (description == "mutex-bad-read-lock") {
+ return "Read lock of a write locked mutex detected";
+ } else if (description == "mutex-bad-read-unlock") {
+ return "Read unlock of a write locked mutex detected";
+ } else if (description == "signal-unsafe-call") {
+ return "Signal-unsafe call inside a signal handler detected";
+ } else if (description == "errno-in-signal-handler") {
+ return "Overwrite of errno in a signal handler detected";
+ } else if (description == "lock-order-inversion") {
+ return "Lock order inversion (potential deadlock) detected";
+ }
+
+ // for unknown report codes just show the code
+ return description;
+}
+
+bool
+ThreadSanitizerRuntime::NotifyBreakpointHit(void *baton, StoppointCallbackContext *context, user_id_t break_id, user_id_t break_loc_id)
+{
+ assert (baton && "null baton");
+ if (!baton)
+ return false;
+
+ ThreadSanitizerRuntime *const instance = static_cast<ThreadSanitizerRuntime*>(baton);
+
+ StructuredData::ObjectSP report = instance->RetrieveReportData(context->exe_ctx_ref);
+ std::string description;
+ if (report) {
+ description = instance->FormatDescription(report);
+ }
+ ProcessSP process_sp = instance->GetProcessSP();
+ // Make sure this is the right process
+ if (process_sp && process_sp == context->exe_ctx_ref.GetProcessSP())
+ {
+ ThreadSP thread_sp = context->exe_ctx_ref.GetThreadSP();
+ if (thread_sp)
+ thread_sp->SetStopInfo(InstrumentationRuntimeStopInfo::CreateStopReasonWithInstrumentationData(*thread_sp, description.c_str(), report));
+
+ StreamFileSP stream_sp (process_sp->GetTarget().GetDebugger().GetOutputFile());
+ if (stream_sp)
+ {
+ stream_sp->Printf ("ThreadSanitizer report breakpoint hit. Use 'thread info -s' to get extended information about the report.\n");
+ }
+ return true; // Return true to stop the target
+ }
+ else
+ return false; // Let target run
+}
+
+void
+ThreadSanitizerRuntime::Activate()
+{
+ if (m_is_active)
+ return;
+
+ ProcessSP process_sp = GetProcessSP();
+ if (!process_sp)
+ return;
+
+ ConstString symbol_name ("__tsan_on_report");
+ const Symbol *symbol = GetRuntimeModuleSP()->FindFirstSymbolWithNameAndType (symbol_name, eSymbolTypeCode);
+
+ if (symbol == NULL)
+ return;
+
+ if (!symbol->ValueIsAddress() || !symbol->GetAddressRef().IsValid())
+ return;
+
+ Target &target = process_sp->GetTarget();
+ addr_t symbol_address = symbol->GetAddressRef().GetOpcodeLoadAddress(&target);
+
+ if (symbol_address == LLDB_INVALID_ADDRESS)
+ return;
+
+ bool internal = true;
+ bool hardware = false;
+ Breakpoint *breakpoint = process_sp->GetTarget().CreateBreakpoint(symbol_address, internal, hardware).get();
+ breakpoint->SetCallback (ThreadSanitizerRuntime::NotifyBreakpointHit, this, true);
+ breakpoint->SetBreakpointKind ("thread-sanitizer-report");
+ m_breakpoint_id = breakpoint->GetID();
+
+ StreamFileSP stream_sp (process_sp->GetTarget().GetDebugger().GetOutputFile());
+ if (stream_sp)
+ {
+ stream_sp->Printf ("ThreadSanitizer debugger support is active.\n");
+ }
+
+ m_is_active = true;
+}
+
+void
+ThreadSanitizerRuntime::Deactivate()
+{
+ if (m_breakpoint_id != LLDB_INVALID_BREAK_ID)
+ {
+ ProcessSP process_sp = GetProcessSP();
+ if (process_sp)
+ {
+ process_sp->GetTarget().RemoveBreakpointByID(m_breakpoint_id);
+ m_breakpoint_id = LLDB_INVALID_BREAK_ID;
+ }
+ }
+ m_is_active = false;
+}