[inspector] Initial import of v8_inspector.

src/inspector/JavaScriptCallFrame.cpp

Index: src/inspector/JavaScriptCallFrame.cpp
diff --git a/src/inspector/JavaScriptCallFrame.cpp b/src/inspector/JavaScriptCallFrame.cpp
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+/*
+ * Copyright (c) 2010, Google Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "src/inspector/JavaScriptCallFrame.h"
+
+#include "src/inspector/StringUtil.h"
+#include "src/inspector/V8Compat.h"
+
+#include <v8-debug.h>
+
+namespace v8_inspector {
+
+JavaScriptCallFrame::JavaScriptCallFrame(v8::Local<v8::Context> debuggerContext,
+                                         v8::Local<v8::Object> callFrame)
+    : m_isolate(debuggerContext->GetIsolate()),
+      m_debuggerContext(m_isolate, debuggerContext),
+      m_callFrame(m_isolate, callFrame) {}
+
+JavaScriptCallFrame::~JavaScriptCallFrame() {}
+
+int JavaScriptCallFrame::callV8FunctionReturnInt(const char* name) const {
+  v8::HandleScope handleScope(m_isolate);
+  v8::MicrotasksScope microtasks(m_isolate,
+                                 v8::MicrotasksScope::kDoNotRunMicrotasks);
+  v8::Local<v8::Context> context =
+      v8::Local<v8::Context>::New(m_isolate, m_debuggerContext);
+  v8::Local<v8::Object> callFrame =
+      v8::Local<v8::Object>::New(m_isolate, m_callFrame);
+  v8::Local<v8::Function> func = v8::Local<v8::Function>::Cast(
+      callFrame->Get(toV8StringInternalized(m_isolate, name)));
+  v8::Local<v8::Value> result;
+  if (!func->Call(context, callFrame, 0, nullptr).ToLocal(&result) ||
+      !result->IsInt32())
+    return 0;
+  return result.As<v8::Int32>()->Value();
+}
+
+int JavaScriptCallFrame::sourceID() const {
+  return callV8FunctionReturnInt("sourceID");
+}
+
+int JavaScriptCallFrame::line() const {
+  return callV8FunctionReturnInt("line");
+}
+
+int JavaScriptCallFrame::column() const {
+  return callV8FunctionReturnInt("column");
+}
+
+int JavaScriptCallFrame::contextId() const {
+  return callV8FunctionReturnInt("contextId");
+}
+
+bool JavaScriptCallFrame::isAtReturn() const {
+  v8::HandleScope handleScope(m_isolate);
+  v8::Local<v8::Value> result =
+      v8::Local<v8::Object>::New(m_isolate, m_callFrame)
+          ->Get(toV8StringInternalized(m_isolate, "isAtReturn"));
+  if (result.IsEmpty() || !result->IsBoolean()) return false;
+  return result->BooleanValue();
+}
+
+v8::Local<v8::Object> JavaScriptCallFrame::details() const {
+  v8::MicrotasksScope microtasks(m_isolate,
+                                 v8::MicrotasksScope::kDoNotRunMicrotasks);
+  v8::Local<v8::Object> callFrame =
+      v8::Local<v8::Object>::New(m_isolate, m_callFrame);
+  v8::Local<v8::Function> func = v8::Local<v8::Function>::Cast(
+      callFrame->Get(toV8StringInternalized(m_isolate, "details")));
+  return v8::Local<v8::Object>::Cast(
+      func->Call(m_debuggerContext.Get(m_isolate), callFrame, 0, nullptr)
+          .ToLocalChecked());
+}
+
+v8::MaybeLocal<v8::Value> JavaScriptCallFrame::evaluate(
+    v8::Local<v8::Value> expression) {
+  v8::MicrotasksScope microtasks(m_isolate,
+                                 v8::MicrotasksScope::kRunMicrotasks);
+  v8::Local<v8::Object> callFrame =
+      v8::Local<v8::Object>::New(m_isolate, m_callFrame);
+  v8::Local<v8::Function> evalFunction = v8::Local<v8::Function>::Cast(
+      callFrame->Get(toV8StringInternalized(m_isolate, "evaluate")));
+  return evalFunction->Call(m_debuggerContext.Get(m_isolate), callFrame, 1,
+                            &expression);
+}
+
+v8::MaybeLocal<v8::Value> JavaScriptCallFrame::restart() {
+  v8::MicrotasksScope microtasks(m_isolate,
+                                 v8::MicrotasksScope::kDoNotRunMicrotasks);
+  v8::Local<v8::Object> callFrame =
+      v8::Local<v8::Object>::New(m_isolate, m_callFrame);
+  v8::Local<v8::Function> restartFunction = v8::Local<v8::Function>::Cast(
+      callFrame->Get(toV8StringInternalized(m_isolate, "restart")));
+  v8::Debug::SetLiveEditEnabled(m_isolate, true);
+  v8::MaybeLocal<v8::Value> result = restartFunction->Call(
+      m_debuggerContext.Get(m_isolate), callFrame, 0, nullptr);
+  v8::Debug::SetLiveEditEnabled(m_isolate, false);
+  return result;
+}
+
+v8::MaybeLocal<v8::Value> JavaScriptCallFrame::setVariableValue(
+    int scopeNumber, v8::Local<v8::Value> variableName,
+    v8::Local<v8::Value> newValue) {
+  v8::MicrotasksScope microtasks(m_isolate,
+                                 v8::MicrotasksScope::kDoNotRunMicrotasks);
+  v8::Local<v8::Object> callFrame =
+      v8::Local<v8::Object>::New(m_isolate, m_callFrame);
+  v8::Local<v8::Function> setVariableValueFunction =
+      v8::Local<v8::Function>::Cast(callFrame->Get(
+          toV8StringInternalized(m_isolate, "setVariableValue")));
+  v8::Local<v8::Value> argv[] = {
+      v8::Local<v8::Value>(v8::Integer::New(m_isolate, scopeNumber)),
+      variableName, newValue};
+  return setVariableValueFunction->Call(m_debuggerContext.Get(m_isolate),
+                                        callFrame,
+                                        V8_INSPECTOR_ARRAY_LENGTH(argv), argv);
+}
+
+}  // namespace v8_inspector