[inspector] introduced exceptionThrown support in test runner

test/inspector/task-runner.cc

 // Copyright 2016 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "test/inspector/task-runner.h"
 
 #if !defined(_WIN32) && !defined(_WIN64)
 #include <unistd.h>  // NOLINT
 #endif               // !defined(_WIN32) && !defined(_WIN64)
 
 namespace {
 
 const int kTaskRunnerIndex = 2;
 
 void ReportUncaughtException(v8::Isolate* isolate,
                              const v8::TryCatch& try_catch) {
   CHECK(try_catch.HasCaught());
   v8::HandleScope handle_scope(isolate);
   std::string message = *v8::String::Utf8Value(try_catch.Message()->Get());
   fprintf(stderr, "Unhandle exception: %s\n", message.data());
 }
 
 }  //  namespace
 
 TaskRunner::TaskRunner(v8::ExtensionConfiguration* extensions,
+                       bool catch_exceptions,
                        v8::base::Semaphore* ready_semaphore)
     : Thread(Options("Task Runner")),
       extensions_(extensions),
+      catch_exceptions_(catch_exceptions),
       ready_semaphore_(ready_semaphore),
       isolate_(nullptr),
       process_queue_semaphore_(0),
       nested_loop_count_(0) {
   Start();
 }
 
 TaskRunner::~TaskRunner() { Join(); }
 
 void TaskRunner::InitializeContext() {
@@ skipping 18 matching lines @@
 void TaskRunner::Run() {
   InitializeContext();
   RunMessageLoop(false);
 }
 
 void TaskRunner::RunMessageLoop(bool only_protocol) {
   int loop_number = ++nested_loop_count_;
   while (nested_loop_count_ == loop_number) {
     TaskRunner::Task* task = GetNext(only_protocol);
     v8::Isolate::Scope isolate_scope(isolate_);
-    v8::TryCatch try_catch(isolate_);
-    task->Run(isolate_, context_);
-    delete task;
-    if (try_catch.HasCaught()) {
-      ReportUncaughtException(isolate_, try_catch);
-      fflush(stdout);
-      fflush(stderr);
-      _exit(0);
+    if (catch_exceptions_) {
+      v8::TryCatch try_catch(isolate_);
+      task->Run(isolate_, context_);
+      delete task;
+      if (try_catch.HasCaught()) {
+        ReportUncaughtException(isolate_, try_catch);
+        fflush(stdout);
+        fflush(stderr);
+        _exit(0);
+      }
+    } else {
+      task->Run(isolate_, context_);
+      delete task;
     }
   }
 }
 
 void TaskRunner::QuitMessageLoop() {
   DCHECK(nested_loop_count_ > 0);
   --nested_loop_count_;
 }
 
 void TaskRunner::Append(Task* task) {
@@ skipping 44 matching lines @@
           .ToLocalChecked();
 
   v8::ScriptCompiler::Source scriptSource(source, origin);
   v8::Local<v8::Script> script;
   if (!v8::ScriptCompiler::Compile(local_context, &scriptSource)
            .ToLocal(&script))
     return;
   v8::MaybeLocal<v8::Value> result;
   result = script->Run(local_context);
 }