[debugger] expose side-effect free evaluate to inspector.

src/inspector/v8-debugger-agent-impl.cc

 // Copyright 2015 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 "src/inspector/v8-debugger-agent-impl.h"
 
 #include <algorithm>
 
 #include "src/debug/debug-interface.h"
 #include "src/inspector/injected-script.h"
@@ skipping 673 matching lines @@
 void V8DebuggerAgentImpl::setPauseOnExceptionsImpl(int pauseState) {
   m_debugger->setPauseOnExceptionsState(
       static_cast<v8::debug::ExceptionBreakState>(pauseState));
   m_state->setInteger(DebuggerAgentState::pauseOnExceptionsState, pauseState);
 }
 
 Response V8DebuggerAgentImpl::evaluateOnCallFrame(
     const String16& callFrameId, const String16& expression,
     Maybe<String16> objectGroup, Maybe<bool> includeCommandLineAPI,
     Maybe<bool> silent, Maybe<bool> returnByValue, Maybe<bool> generatePreview,
-    std::unique_ptr<RemoteObject>* result,
+    Maybe<bool> throwOnSideEffect, std::unique_ptr<RemoteObject>* result,
     Maybe<protocol::Runtime::ExceptionDetails>* exceptionDetails) {
   if (!isPaused()) return Response::Error(kDebuggerNotPaused);
   InjectedScript::CallFrameScope scope(m_inspector, m_session->contextGroupId(),
                                        callFrameId);
   Response response = scope.initialize();
   if (!response.isSuccess()) return response;
   if (scope.frameOrdinal() >= m_pausedCallFrames.size())
     return Response::Error("Could not find call frame with given id");
 
   if (includeCommandLineAPI.fromMaybe(false)) scope.installCommandLineAPI();
   if (silent.fromMaybe(false)) scope.ignoreExceptionsAndMuteConsole();
 
   v8::MaybeLocal<v8::Value> maybeResultValue =
       m_pausedCallFrames[scope.frameOrdinal()]->evaluate(
-          toV8String(m_isolate, expression));
+          toV8String(m_isolate, expression),
+          throwOnSideEffect.fromMaybe(false));
 
   // Re-initialize after running client's code, as it could have destroyed
   // context or session.
   response = scope.initialize();
   if (!response.isSuccess()) return response;
   return scope.injectedScript()->wrapEvaluateResult(
       maybeResultValue, scope.tryCatch(), objectGroup.fromMaybe(""),
       returnByValue.fromMaybe(false), generatePreview.fromMaybe(false), result,
       exceptionDetails);
 }
@@ skipping 457 matching lines @@
 void V8DebuggerAgentImpl::reset() {
   if (!enabled()) return;
   m_scheduledDebuggerStep = NoStep;
   m_blackboxedPositions.clear();
   resetBlackboxedStateCache();
   m_scripts.clear();
   m_breakpointIdToDebuggerBreakpointIds.clear();
 }
 
 }  // namespace v8_inspector