webkitgtk-2.10.2webkitgtk-2.10.2

1 files changed, 261 insertions, 0 deletions

diff --git a/Source/JavaScriptCore/debugger/DebuggerCallFrame.cpp b/Source/JavaScriptCore/debugger/DebuggerCallFrame.cpp
new file mode 100644
index 000000000..bf093e89b
--- /dev/null
+++ b/Source/JavaScriptCore/debugger/DebuggerCallFrame.cpp
@@ -0,0 +1,261 @@
+/*
+ * Copyright (C) 2008, 2013, 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.
+ * 3.  Neither the name of Apple Inc. ("Apple") 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 APPLE AND ITS 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 APPLE OR ITS 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 "DebuggerCallFrame.h"
+
+#include "CodeBlock.h"
+#include "DebuggerEvalEnabler.h"
+#include "DebuggerScope.h"
+#include "Interpreter.h"
+#include "JSFunction.h"
+#include "JSLexicalEnvironment.h"
+#include "JSCInlines.h"
+#include "Parser.h"
+#include "StackVisitor.h"
+#include "StrongInlines.h"
+
+namespace JSC {
+
+class LineAndColumnFunctor {
+public:
+    StackVisitor::Status operator()(StackVisitor& visitor)
+    {
+        visitor->computeLineAndColumn(m_line, m_column);
+        return StackVisitor::Done;
+    }
+
+    unsigned line() const { return m_line; }
+    unsigned column() const { return m_column; }
+
+private:
+    unsigned m_line;
+    unsigned m_column;
+};
+
+class FindCallerMidStackFunctor {
+public:
+    FindCallerMidStackFunctor(CallFrame* callFrame)
+        : m_callFrame(callFrame)
+        , m_callerFrame(nullptr)
+    { }
+
+    StackVisitor::Status operator()(StackVisitor& visitor)
+    {
+        if (visitor->callFrame() == m_callFrame) {
+            m_callerFrame = visitor->callerFrame();
+            return StackVisitor::Done;
+        }
+        return StackVisitor::Continue;
+    }
+
+    CallFrame* getCallerFrame() const { return m_callerFrame; }
+
+private:
+    CallFrame* m_callFrame;
+    CallFrame* m_callerFrame;
+};
+
+DebuggerCallFrame::DebuggerCallFrame(CallFrame* callFrame)
+    : m_callFrame(callFrame)
+{
+    m_position = positionForCallFrame(m_callFrame);
+}
+
+RefPtr<DebuggerCallFrame> DebuggerCallFrame::callerFrame()
+{
+    ASSERT(isValid());
+    if (!isValid())
+        return 0;
+
+    if (m_caller)
+        return m_caller;
+
+    FindCallerMidStackFunctor functor(m_callFrame);
+    m_callFrame->vm().topCallFrame->iterate(functor);
+
+    CallFrame* callerFrame = functor.getCallerFrame();
+    if (!callerFrame)
+        return nullptr;
+
+    m_caller = DebuggerCallFrame::create(callerFrame);
+    return m_caller;
+}
+
+JSC::JSGlobalObject* DebuggerCallFrame::vmEntryGlobalObject() const
+{
+    ASSERT(isValid());
+    if (!isValid())
+        return 0;
+    return m_callFrame->vmEntryGlobalObject();
+}
+
+SourceID DebuggerCallFrame::sourceID() const
+{
+    ASSERT(isValid());
+    if (!isValid())
+        return noSourceID;
+    return sourceIDForCallFrame(m_callFrame);
+}
+
+String DebuggerCallFrame::functionName() const
+{
+    ASSERT(isValid());
+    if (!isValid())
+        return String();
+    JSFunction* function = jsDynamicCast<JSFunction*>(m_callFrame->callee());
+    if (!function)
+        return String();
+
+    return getCalculatedDisplayName(m_callFrame, function);
+}
+
+DebuggerScope* DebuggerCallFrame::scope()
+{
+    ASSERT(isValid());
+    if (!isValid())
+        return 0;
+
+    if (!m_scope) {
+        VM& vm = m_callFrame->vm();
+        JSScope* scope;
+        CodeBlock* codeBlock = m_callFrame->codeBlock();
+        if (codeBlock && codeBlock->scopeRegister().isValid())
+            scope = m_callFrame->scope(codeBlock->scopeRegister().offset());
+        else if (JSCallee* callee = jsDynamicCast<JSCallee*>(m_callFrame->callee()))
+            scope = callee->scope();
+        else
+            scope = m_callFrame->lexicalGlobalObject();
+
+        m_scope.set(vm, DebuggerScope::create(vm, scope));
+    }
+    return m_scope.get();
+}
+
+DebuggerCallFrame::Type DebuggerCallFrame::type() const
+{
+    ASSERT(isValid());
+    if (!isValid())
+        return ProgramType;
+
+    if (jsDynamicCast<JSFunction*>(m_callFrame->callee()))
+        return FunctionType;
+
+    return ProgramType;
+}
+
+JSValue DebuggerCallFrame::thisValue() const
+{
+    ASSERT(isValid());
+    return thisValueForCallFrame(m_callFrame);
+}
+
+// Evaluate some JavaScript code in the scope of this frame.
+JSValue DebuggerCallFrame::evaluate(const String& script, NakedPtr<Exception>& exception)
+{
+    ASSERT(isValid());
+    CallFrame* callFrame = m_callFrame;
+    if (!callFrame)
+        return jsNull();
+
+    JSLockHolder lock(callFrame);
+
+    if (!callFrame->codeBlock())
+        return JSValue();
+    
+    DebuggerEvalEnabler evalEnabler(callFrame);
+    VM& vm = callFrame->vm();
+    auto& codeBlock = *callFrame->codeBlock();
+    ThisTDZMode thisTDZMode = codeBlock.unlinkedCodeBlock()->constructorKind() == ConstructorKind::Derived ? ThisTDZMode::AlwaysCheck : ThisTDZMode::CheckIfNeeded;
+
+    VariableEnvironment variablesUnderTDZ;
+    JSScope::collectVariablesUnderTDZ(scope()->jsScope(), variablesUnderTDZ);
+
+    EvalExecutable* eval = EvalExecutable::create(callFrame, makeSource(script), codeBlock.isStrictMode(), thisTDZMode, &variablesUnderTDZ);
+    if (vm.exception()) {
+        exception = vm.exception();
+        vm.clearException();
+        return jsUndefined();
+    }
+
+    JSValue thisValue = thisValueForCallFrame(callFrame);
+    JSValue result = vm.interpreter->execute(eval, callFrame, thisValue, scope()->jsScope());
+    if (vm.exception()) {
+        exception = vm.exception();
+        vm.clearException();
+    }
+    ASSERT(result);
+    return result;
+}
+
+void DebuggerCallFrame::invalidate()
+{
+    RefPtr<DebuggerCallFrame> frame = this;
+    while (frame) {
+        frame->m_callFrame = nullptr;
+        if (frame->m_scope) {
+            frame->m_scope->invalidateChain();
+            frame->m_scope.clear();
+        }
+        frame = frame->m_caller.release();
+    }
+}
+
+TextPosition DebuggerCallFrame::positionForCallFrame(CallFrame* callFrame)
+{
+    if (!callFrame)
+        return TextPosition();
+
+    LineAndColumnFunctor functor;
+    callFrame->iterate(functor);
+    return TextPosition(OrdinalNumber::fromOneBasedInt(functor.line()), OrdinalNumber::fromOneBasedInt(functor.column()));
+}
+
+SourceID DebuggerCallFrame::sourceIDForCallFrame(CallFrame* callFrame)
+{
+    ASSERT(callFrame);
+    CodeBlock* codeBlock = callFrame->codeBlock();
+    if (!codeBlock)
+        return noSourceID;
+    return codeBlock->ownerExecutable()->sourceID();
+}
+
+JSValue DebuggerCallFrame::thisValueForCallFrame(CallFrame* callFrame)
+{
+    if (!callFrame)
+        return jsNull();
+
+    ECMAMode ecmaMode = NotStrictMode;
+    CodeBlock* codeBlock = callFrame->codeBlock();
+    if (codeBlock && codeBlock->isStrictMode())
+        ecmaMode = StrictMode;
+    JSValue thisValue = callFrame->thisValue().toThis(callFrame, ecmaMode);
+    return thisValue;
+}
+
+} // namespace JSC