[inspector] introduce limit for amount of stored async stacks

test/inspector/inspector-test.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.
 
 #if !defined(_WIN32) && !defined(_WIN64)
 #include <unistd.h>  // NOLINT
 #endif               // !defined(_WIN32) && !defined(_WIN64)
 
 #include <locale.h>
 
 #include "include/libplatform/libplatform.h"
 #include "include/v8.h"
 
 #include "src/base/platform/platform.h"
 #include "src/flags.h"
+#include "src/inspector/test-interface.h"
 #include "src/utils.h"
 #include "src/vector.h"
 
 #include "test/inspector/inspector-impl.h"
 #include "test/inspector/task-runner.h"
 
 namespace {
 
 std::vector<TaskRunner*> task_runners;
 
@@ skipping 224 matching lines @@
     }
     TaskRunner::FromContext(context)->Append(task.release());
   }
 };
 
 class InspectorExtension : public v8::Extension {
  public:
   InspectorExtension()
       : v8::Extension("v8_inspector/inspector",
                       "native function attachInspector();"
-                      "native function detachInspector();") {}
+                      "native function detachInspector();"
+                      "native function setMaxAsyncTaskStacks();") {}
 
   virtual v8::Local<v8::FunctionTemplate> GetNativeFunctionTemplate(
       v8::Isolate* isolate, v8::Local<v8::String> name) {
     v8::Local<v8::Context> context = isolate->GetCurrentContext();
     if (name->Equals(context,
                      v8::String::NewFromUtf8(isolate, "attachInspector",
                                              v8::NewStringType::kNormal)
                          .ToLocalChecked())
             .FromJust()) {
       return v8::FunctionTemplate::New(isolate, InspectorExtension::Attach);
     } else if (name->Equals(context,
                             v8::String::NewFromUtf8(isolate, "detachInspector",
                                                     v8::NewStringType::kNormal)
                                 .ToLocalChecked())
                    .FromJust()) {
       return v8::FunctionTemplate::New(isolate, InspectorExtension::Detach);
+    } else if (name->Equals(context, v8::String::NewFromUtf8(
+                                         isolate, "setMaxAsyncTaskStacks",
+                                         v8::NewStringType::kNormal)
+                                         .ToLocalChecked())
+                   .FromJust()) {
+      return v8::FunctionTemplate::New(
+          isolate, InspectorExtension::SetMaxAsyncTaskStacks);
     }
     return v8::Local<v8::FunctionTemplate>();
   }
 
  private:
   static void Attach(const v8::FunctionCallbackInfo<v8::Value>& args) {
     v8::Isolate* isolate = args.GetIsolate();
     v8::Local<v8::Context> context = isolate->GetCurrentContext();
     v8_inspector::V8Inspector* inspector =
         InspectorClientImpl::InspectorFromContext(context);
     if (!inspector) {
       fprintf(stderr, "Inspector client not found - cannot attach!");
       Exit();
     }
     inspector->contextCreated(
         v8_inspector::V8ContextInfo(context, 1, v8_inspector::StringView()));
   }
 
   static void Detach(const v8::FunctionCallbackInfo<v8::Value>& args) {
     v8::Isolate* isolate = args.GetIsolate();
     v8::Local<v8::Context> context = isolate->GetCurrentContext();
     v8_inspector::V8Inspector* inspector =
         InspectorClientImpl::InspectorFromContext(context);
     if (!inspector) {
       fprintf(stderr, "Inspector client not found - cannot detach!");
       Exit();
     }
     inspector->contextDestroyed(context);
   }
+
+  static void SetMaxAsyncTaskStacks(
+      const v8::FunctionCallbackInfo<v8::Value>& args) {
+    if (args.Length() != 1 || !args[0]->IsInt32()) {
+      fprintf(stderr, "Internal error: setMaxAsyncTaskStacks(max).");
+      Exit();
+    }
+    v8_inspector::V8Inspector* inspector =
+        InspectorClientImpl::InspectorFromContext(
+            args.GetIsolate()->GetCurrentContext());
+    CHECK(inspector);
+    v8_inspector::SetMaxAsyncTaskStacksForTest(
+        inspector, args[0].As<v8::Int32>()->Value());
+  }
 };
 
 v8::Local<v8::String> ToString(v8::Isolate* isolate,
                                const v8_inspector::StringView& string) {
   if (string.is8Bit())
     return v8::String::NewFromOneByte(isolate, string.characters8(),
                                       v8::NewStringType::kNormal,
                                       static_cast<int>(string.length()))
         .ToLocalChecked();
   else
@@ skipping 91 matching lines @@
               argv[i]);
       Exit();
     }
     frontend_runner.Append(new ExecuteStringTask(chars));
   }
 
   frontend_runner.Join();
   backend_runner.Join();
   return 0;
 }