[inspector] introduce limit for amount of stored async stacks

src/inspector/v8-debugger.h

 // 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.
 
 #ifndef V8_INSPECTOR_V8DEBUGGER_H_
 #define V8_INSPECTOR_V8DEBUGGER_H_
 
 #include <vector>
 
 #include "src/base/macros.h"
@@ skipping 75 matching lines @@
   void asyncTaskFinished(void* task);
   void allAsyncTasksCanceled();
 
   void muteScriptParsedEvents();
   void unmuteScriptParsedEvents();
 
   V8InspectorImpl* inspector() { return m_inspector; }
 
   WasmTranslation* wasmTranslation() { return &m_wasmTranslation; }
 
+  void setMaxAsyncTaskStacksForTest(int limit) { m_maxAsyncCallStacks = limit; }
+
  private:
   void compileDebuggerScript();
   v8::MaybeLocal<v8::Value> callDebuggerMethod(const char* functionName,
                                                int argc,
                                                v8::Local<v8::Value> argv[]);
   v8::Local<v8::Context> debuggerContext() const;
   void clearBreakpoints();
 
   static void breakProgramCallback(const v8::FunctionCallbackInfo<v8::Value>&);
   void handleProgramBreak(v8::Local<v8::Context> pausedContext,
@@ skipping 37 matching lines @@
   v8::Global<v8::Object> m_debuggerScript;
   v8::Global<v8::Context> m_debuggerContext;
   v8::Local<v8::Object> m_executionState;
   v8::Local<v8::Context> m_pausedContext;
   bool m_runningNestedMessageLoop;
   int m_ignoreScriptParsedEventsCounter;
 
   using AsyncTaskToStackTrace =
       protocol::HashMap<void*, std::unique_ptr<V8StackTraceImpl>>;
   AsyncTaskToStackTrace m_asyncTaskStacks;
+  int m_maxAsyncCallStacks;
+  std::map<int, void*> m_idToTask;
+  std::unordered_map<void*, int> m_taskToId;
+  int m_lastTaskId;
   protocol::HashSet<void*> m_recurringTasks;
   int m_maxAsyncCallStackDepth;
   std::vector<void*> m_currentTasks;
   std::vector<std::unique_ptr<V8StackTraceImpl>> m_currentStacks;
   protocol::HashMap<V8DebuggerAgentImpl*, int> m_maxAsyncCallStackDepthMap;
 
   v8::debug::ExceptionBreakState m_pauseOnExceptionsState;
 
   WasmTranslation m_wasmTranslation;
 
   DISALLOW_COPY_AND_ASSIGN(V8Debugger);
 };
 
 }  // namespace v8_inspector
 
 #endif  // V8_INSPECTOR_V8DEBUGGER_H_