Merge WebKit at r75315: Initial merge by git.

Change-Id: I570314b346ce101c935ed22a626b48c2af266b84

1 files changed, 313 insertions, 0 deletions

diff --git a/Source/JavaScriptCore/runtime/Executable.cpp b/Source/JavaScriptCore/runtime/Executable.cpp
new file mode 100644
index 0000000..c7262be
--- /dev/null
+++ b/Source/JavaScriptCore/runtime/Executable.cpp
@@ -0,0 +1,313 @@
+/*
+ * Copyright (C) 2009, 2010 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 "Executable.h"
+
+#include "BytecodeGenerator.h"
+#include "CodeBlock.h"
+#include "JIT.h"
+#include "Parser.h"
+#include "UStringBuilder.h"
+#include "Vector.h"
+
+namespace JSC {
+
+#if ENABLE(JIT)
+NativeExecutable::~NativeExecutable()
+{
+}
+#endif
+
+VPtrHackExecutable::~VPtrHackExecutable()
+{
+}
+
+EvalExecutable::EvalExecutable(ExecState* exec, const SourceCode& source, bool inStrictContext)
+    : ScriptExecutable(exec, source, inStrictContext)
+{
+}
+
+EvalExecutable::~EvalExecutable()
+{
+}
+
+ProgramExecutable::ProgramExecutable(ExecState* exec, const SourceCode& source)
+    : ScriptExecutable(exec, source, false)
+{
+}
+
+ProgramExecutable::~ProgramExecutable()
+{
+}
+
+FunctionExecutable::FunctionExecutable(JSGlobalData* globalData, const Identifier& name, const SourceCode& source, bool forceUsesArguments, FunctionParameters* parameters, bool inStrictContext, int firstLine, int lastLine)
+    : ScriptExecutable(globalData, source, inStrictContext)
+    , m_numCapturedVariables(0)
+    , m_forceUsesArguments(forceUsesArguments)
+    , m_parameters(parameters)
+    , m_name(name)
+    , m_symbolTable(0)
+{
+    m_firstLine = firstLine;
+    m_lastLine = lastLine;
+}
+
+FunctionExecutable::FunctionExecutable(ExecState* exec, const Identifier& name, const SourceCode& source, bool forceUsesArguments, FunctionParameters* parameters, bool inStrictContext, int firstLine, int lastLine)
+    : ScriptExecutable(exec, source, inStrictContext)
+    , m_numCapturedVariables(0)
+    , m_forceUsesArguments(forceUsesArguments)
+    , m_parameters(parameters)
+    , m_name(name)
+    , m_symbolTable(0)
+{
+    m_firstLine = firstLine;
+    m_lastLine = lastLine;
+}
+
+FunctionExecutable::~FunctionExecutable()
+{
+}
+
+JSObject* EvalExecutable::compileInternal(ExecState* exec, ScopeChainNode* scopeChainNode)
+{
+    JSObject* exception = 0;
+    JSGlobalData* globalData = &exec->globalData();
+    JSGlobalObject* lexicalGlobalObject = exec->lexicalGlobalObject();
+    RefPtr<EvalNode> evalNode = globalData->parser->parse<EvalNode>(lexicalGlobalObject, lexicalGlobalObject->debugger(), exec, m_source, 0, isStrictMode() ? JSParseStrict : JSParseNormal, &exception);
+    if (!evalNode) {
+        ASSERT(exception);
+        return exception;
+    }
+    recordParse(evalNode->features(), evalNode->hasCapturedVariables(), evalNode->lineNo(), evalNode->lastLine());
+
+    ScopeChain scopeChain(scopeChainNode);
+    JSGlobalObject* globalObject = scopeChain.globalObject();
+
+    ASSERT(!m_evalCodeBlock);
+    m_evalCodeBlock = adoptPtr(new EvalCodeBlock(this, globalObject, source().provider(), scopeChain.localDepth()));
+    OwnPtr<BytecodeGenerator> generator(adoptPtr(new BytecodeGenerator(evalNode.get(), scopeChain, m_evalCodeBlock->symbolTable(), m_evalCodeBlock.get())));
+    generator->generate();
+    
+    evalNode->destroyData();
+
+#if ENABLE(JIT)
+    if (exec->globalData().canUseJIT()) {
+        m_jitCodeForCall = JIT::compile(scopeChainNode->globalData, m_evalCodeBlock.get());
+#if !ENABLE(OPCODE_SAMPLING)
+        if (!BytecodeGenerator::dumpsGeneratedCode())
+            m_evalCodeBlock->discardBytecode();
+#endif
+    }
+#endif
+
+    return 0;
+}
+
+JSObject* ProgramExecutable::checkSyntax(ExecState* exec)
+{
+    JSObject* exception = 0;
+    JSGlobalData* globalData = &exec->globalData();
+    JSGlobalObject* lexicalGlobalObject = exec->lexicalGlobalObject();
+    RefPtr<ProgramNode> programNode = globalData->parser->parse<ProgramNode>(lexicalGlobalObject, lexicalGlobalObject->debugger(), exec, m_source, 0, JSParseNormal, &exception);
+    if (programNode)
+        return 0;
+    ASSERT(exception);
+    return exception;
+}
+
+JSObject* ProgramExecutable::compileInternal(ExecState* exec, ScopeChainNode* scopeChainNode)
+{
+    ASSERT(!m_programCodeBlock);
+
+    JSObject* exception = 0;
+    JSGlobalData* globalData = &exec->globalData();
+    JSGlobalObject* lexicalGlobalObject = exec->lexicalGlobalObject();
+    RefPtr<ProgramNode> programNode = globalData->parser->parse<ProgramNode>(lexicalGlobalObject, lexicalGlobalObject->debugger(), exec, m_source, 0, isStrictMode() ? JSParseStrict : JSParseNormal, &exception);
+    if (!programNode) {
+        ASSERT(exception);
+        return exception;
+    }
+    recordParse(programNode->features(), programNode->hasCapturedVariables(), programNode->lineNo(), programNode->lastLine());
+
+    ScopeChain scopeChain(scopeChainNode);
+    JSGlobalObject* globalObject = scopeChain.globalObject();
+    
+    m_programCodeBlock = adoptPtr(new ProgramCodeBlock(this, GlobalCode, globalObject, source().provider()));
+    OwnPtr<BytecodeGenerator> generator(adoptPtr(new BytecodeGenerator(programNode.get(), scopeChain, &globalObject->symbolTable(), m_programCodeBlock.get())));
+    generator->generate();
+
+    programNode->destroyData();
+
+#if ENABLE(JIT)
+    if (exec->globalData().canUseJIT()) {
+        m_jitCodeForCall = JIT::compile(scopeChainNode->globalData, m_programCodeBlock.get());
+#if !ENABLE(OPCODE_SAMPLING)
+        if (!BytecodeGenerator::dumpsGeneratedCode())
+            m_programCodeBlock->discardBytecode();
+#endif
+    }
+#endif
+
+   return 0;
+}
+
+JSObject* FunctionExecutable::compileForCallInternal(ExecState* exec, ScopeChainNode* scopeChainNode)
+{
+    JSObject* exception = 0;
+    JSGlobalData* globalData = scopeChainNode->globalData;
+    RefPtr<FunctionBodyNode> body = globalData->parser->parse<FunctionBodyNode>(exec->lexicalGlobalObject(), 0, 0, m_source, m_parameters.get(), isStrictMode() ? JSParseStrict : JSParseNormal, &exception);
+    if (!body) {
+        ASSERT(exception);
+        return exception;
+    }
+    if (m_forceUsesArguments)
+        body->setUsesArguments();
+    body->finishParsing(m_parameters, m_name);
+    recordParse(body->features(), body->hasCapturedVariables(), body->lineNo(), body->lastLine());
+
+    ScopeChain scopeChain(scopeChainNode);
+    JSGlobalObject* globalObject = scopeChain.globalObject();
+
+    ASSERT(!m_codeBlockForCall);
+    m_codeBlockForCall = adoptPtr(new FunctionCodeBlock(this, FunctionCode, globalObject, source().provider(), source().startOffset(), false));
+    OwnPtr<BytecodeGenerator> generator(adoptPtr(new BytecodeGenerator(body.get(), scopeChain, m_codeBlockForCall->symbolTable(), m_codeBlockForCall.get())));
+    generator->generate();
+    m_numParametersForCall = m_codeBlockForCall->m_numParameters;
+    ASSERT(m_numParametersForCall);
+    m_numCapturedVariables = m_codeBlockForCall->m_numCapturedVars;
+    m_symbolTable = m_codeBlockForCall->sharedSymbolTable();
+
+    body->destroyData();
+
+#if ENABLE(JIT)
+    if (exec->globalData().canUseJIT()) {
+        m_jitCodeForCall = JIT::compile(scopeChainNode->globalData, m_codeBlockForCall.get(), &m_jitCodeForCallWithArityCheck);
+#if !ENABLE(OPCODE_SAMPLING)
+        if (!BytecodeGenerator::dumpsGeneratedCode())
+            m_codeBlockForCall->discardBytecode();
+#endif
+    }
+#endif
+
+    return 0;
+}
+
+JSObject* FunctionExecutable::compileForConstructInternal(ExecState* exec, ScopeChainNode* scopeChainNode)
+{
+    JSObject* exception = 0;
+    JSGlobalData* globalData = scopeChainNode->globalData;
+    RefPtr<FunctionBodyNode> body = globalData->parser->parse<FunctionBodyNode>(exec->lexicalGlobalObject(), 0, 0, m_source, m_parameters.get(), isStrictMode() ? JSParseStrict : JSParseNormal, &exception);
+    if (!body) {
+        ASSERT(exception);
+        return exception;
+    }
+    if (m_forceUsesArguments)
+        body->setUsesArguments();
+    body->finishParsing(m_parameters, m_name);
+    recordParse(body->features(), body->hasCapturedVariables(), body->lineNo(), body->lastLine());
+
+    ScopeChain scopeChain(scopeChainNode);
+    JSGlobalObject* globalObject = scopeChain.globalObject();
+
+    ASSERT(!m_codeBlockForConstruct);
+    m_codeBlockForConstruct = adoptPtr(new FunctionCodeBlock(this, FunctionCode, globalObject, source().provider(), source().startOffset(), true));
+    OwnPtr<BytecodeGenerator> generator(adoptPtr(new BytecodeGenerator(body.get(), scopeChain, m_codeBlockForConstruct->symbolTable(), m_codeBlockForConstruct.get())));
+    generator->generate();
+    m_numParametersForConstruct = m_codeBlockForConstruct->m_numParameters;
+    ASSERT(m_numParametersForConstruct);
+    m_numCapturedVariables = m_codeBlockForConstruct->m_numCapturedVars;
+    m_symbolTable = m_codeBlockForConstruct->sharedSymbolTable();
+
+    body->destroyData();
+
+#if ENABLE(JIT)
+    if (exec->globalData().canUseJIT()) {
+        m_jitCodeForConstruct = JIT::compile(scopeChainNode->globalData, m_codeBlockForConstruct.get(), &m_jitCodeForConstructWithArityCheck);
+#if !ENABLE(OPCODE_SAMPLING)
+        if (!BytecodeGenerator::dumpsGeneratedCode())
+            m_codeBlockForConstruct->discardBytecode();
+#endif
+    }
+#endif
+
+    return 0;
+}
+
+void FunctionExecutable::markAggregate(MarkStack& markStack)
+{
+    if (m_codeBlockForCall)
+        m_codeBlockForCall->markAggregate(markStack);
+    if (m_codeBlockForConstruct)
+        m_codeBlockForConstruct->markAggregate(markStack);
+}
+
+void FunctionExecutable::discardCode()
+{
+    m_codeBlockForCall.clear();
+    m_codeBlockForConstruct.clear();
+    m_numParametersForCall = NUM_PARAMETERS_NOT_COMPILED;
+    m_numParametersForConstruct = NUM_PARAMETERS_NOT_COMPILED;
+#if ENABLE(JIT)
+    m_jitCodeForCall = JITCode();
+    m_jitCodeForConstruct = JITCode();
+#endif
+}
+
+PassRefPtr<FunctionExecutable> FunctionExecutable::fromGlobalCode(const Identifier& functionName, ExecState* exec, Debugger* debugger, const SourceCode& source, JSObject** exception)
+{
+    JSGlobalObject* lexicalGlobalObject = exec->lexicalGlobalObject();
+    RefPtr<ProgramNode> program = exec->globalData().parser->parse<ProgramNode>(lexicalGlobalObject, debugger, exec, source, 0, JSParseNormal, exception);
+    if (!program) {
+        ASSERT(*exception);
+        return 0;
+    }
+
+    // Uses of this function that would not result in a single function expression are invalid.
+    StatementNode* exprStatement = program->singleStatement();
+    ASSERT(exprStatement);
+    ASSERT(exprStatement->isExprStatement());
+    ExpressionNode* funcExpr = static_cast<ExprStatementNode*>(exprStatement)->expr();
+    ASSERT(funcExpr);
+    ASSERT(funcExpr->isFuncExprNode());
+    FunctionBodyNode* body = static_cast<FuncExprNode*>(funcExpr)->body();
+    ASSERT(body);
+
+    return FunctionExecutable::create(&exec->globalData(), functionName, body->source(), body->usesArguments(), body->parameters(), body->isStrictMode(), body->lineNo(), body->lastLine());
+}
+
+UString FunctionExecutable::paramString() const
+{
+    FunctionParameters& parameters = *m_parameters;
+    UStringBuilder builder;
+    for (size_t pos = 0; pos < parameters.size(); ++pos) {
+        if (!builder.isEmpty())
+            builder.append(", ");
+        builder.append(parameters[pos].ustring());
+    }
+    return builder.toUString();
+}
+
+}