[DevTools] Copy objects from debugger context to inspected context properly.

third_party/WebKit/Source/platform/v8_inspector/V8Debugger.cpp

 // Copyright 2016 The Chromium 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 "platform/v8_inspector/V8Debugger.h"
 
 #include "platform/v8_inspector/DebuggerScript.h"
 #include "platform/v8_inspector/ScriptBreakpoint.h"
 #include "platform/v8_inspector/V8Compat.h"
 #include "platform/v8_inspector/V8DebuggerAgentImpl.h"
 #include "platform/v8_inspector/V8InspectorImpl.h"
 #include "platform/v8_inspector/V8InternalValueType.h"
 #include "platform/v8_inspector/V8StackTraceImpl.h"
 #include "platform/v8_inspector/V8StringUtil.h"
+#include "platform/v8_inspector/V8ValueCopier.h"
 #include "platform/v8_inspector/public/V8InspectorClient.h"
 
 namespace v8_inspector {
 
 namespace {
 const char stepIntoV8MethodName[] = "stepIntoStatement";
 const char stepOutV8MethodName[] = "stepOutOfFunction";
 static const char v8AsyncTaskEventEnqueue[] = "enqueue";
 static const char v8AsyncTaskEventWillHandle[] = "willHandle";
 static const char v8AsyncTaskEventDidHandle[] = "didHandle";
@@ skipping 549 matching lines @@
     DCHECK(value->IsObject());
     m_debuggerScript.Reset(m_isolate, value.As<v8::Object>());
 }
 
 v8::Local<v8::Context> V8Debugger::debuggerContext() const
 {
     DCHECK(!m_debuggerContext.IsEmpty());
     return m_debuggerContext.Get(m_isolate);
 }
 
-v8::MaybeLocal<v8::Value> V8Debugger::functionScopes(v8::Local<v8::Function> function)
+v8::MaybeLocal<v8::Value> V8Debugger::functionScopes(v8::Local<v8::Context> context, v8::Local<v8::Function> function)
 {
     if (!enabled()) {
         NOTREACHED();
         return v8::Local<v8::Value>::New(m_isolate, v8::Undefined(m_isolate));
     }
     v8::Local<v8::Value> argv[] = { function };
     v8::Local<v8::Value> scopesValue;
-    if (!callDebuggerMethod("getFunctionScopes", 1, argv).ToLocal(&scopesValue) || !scopesValue->IsArray())
+    if (!callDebuggerMethod("getFunctionScopes", 1, argv).ToLocal(&scopesValue))
         return v8::MaybeLocal<v8::Value>();
-    v8::Local<v8::Array> scopes = scopesValue.As<v8::Array>();
-    v8::Local<v8::Context> context = m_debuggerContext.Get(m_isolate);
-    if (!markAsInternal(context, scopes, V8InternalValueType::kScopeList))
+    v8::Local<v8::Value> copied;
+    if (!copyValueFromDebuggerContext(m_isolate, debuggerContext(), context, scopesValue).ToLocal(&copied) || !copied->IsArray())
         return v8::MaybeLocal<v8::Value>();
-    if (!markArrayEntriesAsInternal(context, scopes, V8InternalValueType::kScope))
+    if (!markAsInternal(context, v8::Local<v8::Array>::Cast(copied), V8InternalValueType::kScopeList))
         return v8::MaybeLocal<v8::Value>();
-    if (!scopes->SetPrototype(context, v8::Null(m_isolate)).FromMaybe(false))
-        return v8::Undefined(m_isolate);
-    return scopes;
+    if (!markArrayEntriesAsInternal(context, v8::Local<v8::Array>::Cast(copied), V8InternalValueType::kScope))
+        return v8::MaybeLocal<v8::Value>();
+    return copied;
 }
 
 v8::MaybeLocal<v8::Array> V8Debugger::internalProperties(v8::Local<v8::Context> context, v8::Local<v8::Value> value)
 {
     v8::Local<v8::Array> properties;
     if (!v8::Debug::GetInternalProperties(m_isolate, value).ToLocal(&properties))
         return v8::MaybeLocal<v8::Array>();
     if (value->IsFunction()) {
         v8::Local<v8::Function> function = value.As<v8::Function>();
         v8::Local<v8::Value> location = functionLocation(context, function);
         if (location->IsObject()) {
             properties->Set(properties->Length(), toV8StringInternalized(m_isolate, "[[FunctionLocation]]"));
             properties->Set(properties->Length(), location);
         }
         if (function->IsGeneratorFunction()) {
             properties->Set(properties->Length(), toV8StringInternalized(m_isolate, "[[IsGenerator]]"));
             properties->Set(properties->Length(), v8::True(m_isolate));
         }
     }
     if (!enabled())
         return properties;
     if (value->IsMap() || value->IsWeakMap() || value->IsSet() || value->IsWeakSet() || value->IsSetIterator() || value->IsMapIterator()) {
         v8::Local<v8::Value> entries = collectionEntries(context, v8::Local<v8::Object>::Cast(value));
         if (entries->IsArray()) {
             properties->Set(properties->Length(), toV8StringInternalized(m_isolate, "[[Entries]]"));
             properties->Set(properties->Length(), entries);
         }
     }
     if (value->IsGeneratorObject()) {
-        v8::Local<v8::Value> location = generatorObjectLocation(v8::Local<v8::Object>::Cast(value));
+        v8::Local<v8::Value> location = generatorObjectLocation(context, v8::Local<v8::Object>::Cast(value));
         if (location->IsObject()) {
             properties->Set(properties->Length(), toV8StringInternalized(m_isolate, "[[GeneratorLocation]]"));
             properties->Set(properties->Length(), location);
         }
     }
     if (value->IsFunction()) {
         v8::Local<v8::Function> function = value.As<v8::Function>();
         v8::Local<v8::Value> boundFunction = function->GetBoundFunction();
         v8::Local<v8::Value> scopes;
-        if (boundFunction->IsUndefined() && functionScopes(function).ToLocal(&scopes)) {
+        if (boundFunction->IsUndefined() && functionScopes(context, function).ToLocal(&scopes)) {
             properties->Set(properties->Length(), toV8StringInternalized(m_isolate, "[[Scopes]]"));
             properties->Set(properties->Length(), scopes);
         }
     }
     return properties;
 }
 
 v8::Local<v8::Value> V8Debugger::collectionEntries(v8::Local<v8::Context> context, v8::Local<v8::Object> object)
 {
     if (!enabled()) {
         NOTREACHED();
         return v8::Undefined(m_isolate);
     }
     v8::Local<v8::Value> argv[] = { object };
     v8::Local<v8::Value> entriesValue = callDebuggerMethod("getCollectionEntries", 1, argv).ToLocalChecked();
-    if (!entriesValue->IsArray())
+    v8::Local<v8::Value> copied;
+    if (!copyValueFromDebuggerContext(m_isolate, debuggerContext(), context, entriesValue).ToLocal(&copied) || !copied->IsArray())
         return v8::Undefined(m_isolate);
-    v8::Local<v8::Array> entries = entriesValue.As<v8::Array>();
-    if (!markArrayEntriesAsInternal(context, entries, V8InternalValueType::kEntry))
+    if (!markArrayEntriesAsInternal(context, v8::Local<v8::Array>::Cast(copied), V8InternalValueType::kEntry))
         return v8::Undefined(m_isolate);
-    if (!entries->SetPrototype(context, v8::Null(m_isolate)).FromMaybe(false))
-        return v8::Undefined(m_isolate);
-    return entries;
+    return copied;
 }
 
-v8::Local<v8::Value> V8Debugger::generatorObjectLocation(v8::Local<v8::Object> object)
+v8::Local<v8::Value> V8Debugger::generatorObjectLocation(v8::Local<v8::Context> context, v8::Local<v8::Object> object)
 {
     if (!enabled()) {
         NOTREACHED();
         return v8::Null(m_isolate);
     }
     v8::Local<v8::Value> argv[] = { object };
     v8::Local<v8::Value> location = callDebuggerMethod("getGeneratorObjectLocation", 1, argv).ToLocalChecked();
-    if (!location->IsObject())
+    v8::Local<v8::Value> copied;
+    if (!copyValueFromDebuggerContext(m_isolate, debuggerContext(), context, location).ToLocal(&copied) || !copied->IsObject())
         return v8::Null(m_isolate);
-    v8::Local<v8::Context> context = m_debuggerContext.Get(m_isolate);
-    if (!markAsInternal(context, v8::Local<v8::Object>::Cast(location), V8InternalValueType::kLocation))
+    if (!markAsInternal(context, v8::Local<v8::Object>::Cast(copied), V8InternalValueType::kLocation))
         return v8::Null(m_isolate);
-    return location;
+    return copied;
 }
 
 v8::Local<v8::Value> V8Debugger::functionLocation(v8::Local<v8::Context> context, v8::Local<v8::Function> function)
 {
     int scriptId = function->ScriptId();
     if (scriptId == v8::UnboundScript::kNoScriptId)
         return v8::Null(m_isolate);
     int lineNumber = function->GetScriptLineNumber();
     int columnNumber = function->GetScriptColumnNumber();
     if (lineNumber == v8::Function::kLineOffsetNotFound || columnNumber == v8::Function::kLineOffsetNotFound)
         return v8::Null(m_isolate);
     v8::Local<v8::Object> location = v8::Object::New(m_isolate);
+    if (!location->SetPrototype(context, v8::Null(m_isolate)).FromMaybe(false))
+        return v8::Null(m_isolate);
     if (!location->Set(context, toV8StringInternalized(m_isolate, "scriptId"), toV8String(m_isolate, String16::fromInteger(scriptId))).FromMaybe(false))
         return v8::Null(m_isolate);
     if (!location->Set(context, toV8StringInternalized(m_isolate, "lineNumber"), v8::Integer::New(m_isolate, lineNumber)).FromMaybe(false))
         return v8::Null(m_isolate);
     if (!location->Set(context, toV8StringInternalized(m_isolate, "columnNumber"), v8::Integer::New(m_isolate, columnNumber)).FromMaybe(false))
         return v8::Null(m_isolate);
     if (!markAsInternal(context, location, V8InternalValueType::kLocation))
         return v8::Null(m_isolate);
     return location;
 }
@@ skipping 126 matching lines @@
         return nullptr;
 
     size_t stackSize = fullStack ? V8StackTraceImpl::maxCallStackSizeToCapture : 1;
     if (m_inspector->enabledRuntimeAgentForGroup(contextGroupId))
         stackSize = V8StackTraceImpl::maxCallStackSizeToCapture;
 
     return V8StackTraceImpl::capture(this, contextGroupId, stackSize);
 }
 
 } // namespace v8_inspector