JavaScriptCore-7600.1.4.9.tar.gz

[apple/javascriptcore.git] / inspector / JSJavaScriptCallFrame.cpp

diff --git a/inspector/JSJavaScriptCallFrame.cpp b/inspector/JSJavaScriptCallFrame.cpp
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+/*
+ * Copyright (C) 2014 Apple 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:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``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 APPLE INC. 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 "config.h"
+#include "JSJavaScriptCallFrame.h"
+
+#if ENABLE(INSPECTOR)
+
+#include "Error.h"
+#include "JSCJSValue.h"
+#include "JSCellInlines.h"
+#include "JSJavaScriptCallFramePrototype.h"
+#include "StructureInlines.h"
+
+using namespace JSC;
+
+namespace Inspector {
+
+const ClassInfo JSJavaScriptCallFrame::s_info = { "JavaScriptCallFrame", &Base::s_info, 0, 0, CREATE_METHOD_TABLE(JSJavaScriptCallFrame) };
+
+JSJavaScriptCallFrame::JSJavaScriptCallFrame(VM& vm, Structure* structure, PassRefPtr<JavaScriptCallFrame> impl)
+    : JSDestructibleObject(vm, structure)
+    , m_impl(impl.leakRef())
+{
+}
+
+void JSJavaScriptCallFrame::finishCreation(VM& vm)
+{
+    Base::finishCreation(vm);
+    ASSERT(inherits(info()));
+}
+
+JSObject* JSJavaScriptCallFrame::createPrototype(VM& vm, JSGlobalObject* globalObject)
+{
+    return JSJavaScriptCallFramePrototype::create(vm, globalObject, JSJavaScriptCallFramePrototype::createStructure(vm, globalObject, globalObject->objectPrototype()));
+}
+
+void JSJavaScriptCallFrame::destroy(JSC::JSCell* cell)
+{
+    JSJavaScriptCallFrame* thisObject = static_cast<JSJavaScriptCallFrame*>(cell);
+    thisObject->JSJavaScriptCallFrame::~JSJavaScriptCallFrame();
+}
+
+void JSJavaScriptCallFrame::releaseImpl()
+{
+    if (m_impl) {
+        m_impl->deref();
+        m_impl = nullptr;
+    }
+}
+
+JSJavaScriptCallFrame::~JSJavaScriptCallFrame()
+{
+    releaseImpl();
+}
+
+JSValue JSJavaScriptCallFrame::evaluate(ExecState* exec)
+{
+    JSValue exception;
+    JSValue result = impl().evaluate(exec->argument(0).toString(exec)->value(exec), exception);
+    if (exception)
+        exec->vm().throwException(exec, exception);
+
+    return result;
+}
+
+JSValue JSJavaScriptCallFrame::scopeType(ExecState* exec)
+{
+    if (!impl().scopeChain())
+        return jsUndefined();
+
+    if (!exec->argument(0).isInt32())
+        return jsUndefined();
+    int index = exec->argument(0).asInt32();
+
+    JSScope* scopeChain = impl().scopeChain();
+    ScopeChainIterator end = scopeChain->end();
+
+    // FIXME: We should be identifying and returning CATCH_SCOPE appropriately.
+
+    bool foundLocalScope = false;
+    for (ScopeChainIterator iter = scopeChain->begin(); iter != end; ++iter) {
+        JSObject* scope = iter.get();
+        if (scope->isActivationObject()) {
+            if (!foundLocalScope) {
+                // First activation object is local scope, each successive activation object is closure.
+                if (!index)
+                    return jsNumber(JSJavaScriptCallFrame::LOCAL_SCOPE);
+                foundLocalScope = true;
+            } else if (!index)
+                return jsNumber(JSJavaScriptCallFrame::CLOSURE_SCOPE);
+        }
+
+        if (!index) {
+            // Last in the chain is global scope.
+            if (++iter == end)
+                return jsNumber(JSJavaScriptCallFrame::GLOBAL_SCOPE);
+            return jsNumber(JSJavaScriptCallFrame::WITH_SCOPE);
+        }
+
+        --index;
+    }
+
+    ASSERT_NOT_REACHED();
+    return jsUndefined();
+}
+
+JSValue JSJavaScriptCallFrame::caller(ExecState* exec) const
+{
+    return toJS(exec, globalObject(), impl().caller());
+}
+
+JSValue JSJavaScriptCallFrame::sourceID(ExecState*) const
+{
+    return jsNumber(impl().sourceID());
+}
+
+JSValue JSJavaScriptCallFrame::line(ExecState*) const
+{
+    return jsNumber(impl().line());
+}
+
+JSValue JSJavaScriptCallFrame::column(ExecState*) const
+{
+    return jsNumber(impl().column());
+}
+
+JSValue JSJavaScriptCallFrame::functionName(ExecState* exec) const
+{
+    return jsString(exec, impl().functionName());
+}
+
+JSValue JSJavaScriptCallFrame::scopeChain(ExecState* exec) const
+{
+    if (!impl().scopeChain())
+        return jsNull();
+
+    JSScope* scopeChain = impl().scopeChain();
+    ScopeChainIterator iter = scopeChain->begin();
+    ScopeChainIterator end = scopeChain->end();
+
+    // We must always have something in the scope chain.
+    ASSERT(iter != end);
+
+    MarkedArgumentBuffer list;
+    do {
+        list.append(iter.get());
+        ++iter;
+    } while (iter != end);
+
+    return constructArray(exec, nullptr, globalObject(), list);
+}
+
+JSValue JSJavaScriptCallFrame::thisObject(ExecState*) const
+{
+    return impl().thisValue();
+}
+
+JSValue JSJavaScriptCallFrame::type(ExecState* exec) const
+{
+    switch (impl().type()) {
+    case DebuggerCallFrame::FunctionType:
+        return jsNontrivialString(exec, ASCIILiteral("function"));
+    case DebuggerCallFrame::ProgramType:
+        return jsNontrivialString(exec, ASCIILiteral("program"));
+    }
+
+    ASSERT_NOT_REACHED();
+    return jsNull();
+}
+
+JSValue toJS(ExecState* exec, JSGlobalObject* globalObject, JavaScriptCallFrame* impl)
+{
+    if (!impl)
+        return jsNull();
+
+    JSObject* prototype = JSJavaScriptCallFrame::createPrototype(exec->vm(), globalObject);
+    Structure* structure = JSJavaScriptCallFrame::createStructure(exec->vm(), globalObject, prototype);
+    JSJavaScriptCallFrame* javaScriptCallFrame = JSJavaScriptCallFrame::create(exec->vm(), structure, impl);
+
+    return javaScriptCallFrame;
+}
+
+JSJavaScriptCallFrame* toJSJavaScriptCallFrame(JSValue value)
+{
+    return value.inherits(JSJavaScriptCallFrame::info()) ? jsCast<JSJavaScriptCallFrame*>(value) : nullptr;
+}
+
+} // namespace Inspector
+
+#endif // ENABLE(INSPECTOR)