Imported QtWebKit TP3 (git b57bc6801f1876c3220d5a4bfea33d620d477443)

Change-Id: I3b1d8a2808782c9f34d50240000e20cb38d3680f
Reviewed-by: Konstantin Tokarev <annulen@yandex.ru>

1 files changed, 225 insertions, 0 deletions

diff --git a/Source/JavaScriptCore/bytecode/UnlinkedFunctionExecutable.cpp b/Source/JavaScriptCore/bytecode/UnlinkedFunctionExecutable.cpp
new file mode 100644
index 000000000..7ad9d1042
--- /dev/null
+++ b/Source/JavaScriptCore/bytecode/UnlinkedFunctionExecutable.cpp
@@ -0,0 +1,225 @@
+/*
+ * Copyright (C) 2012, 2013, 2015 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 "UnlinkedFunctionExecutable.h"
+
+#include "BytecodeGenerator.h"
+#include "ClassInfo.h"
+#include "CodeCache.h"
+#include "Executable.h"
+#include "ExecutableInfo.h"
+#include "FunctionOverrides.h"
+#include "JSCInlines.h"
+#include "JSString.h"
+#include "Parser.h"
+#include "SourceProvider.h"
+#include "Structure.h"
+#include "SymbolTable.h"
+#include "UnlinkedInstructionStream.h"
+#include <wtf/DataLog.h>
+
+namespace JSC {
+
+static_assert(sizeof(UnlinkedFunctionExecutable) <= 256, "UnlinkedFunctionExecutable should fit in a 256-byte cell.");
+
+const ClassInfo UnlinkedFunctionExecutable::s_info = { "UnlinkedFunctionExecutable", 0, 0, CREATE_METHOD_TABLE(UnlinkedFunctionExecutable) };
+
+static UnlinkedFunctionCodeBlock* generateUnlinkedFunctionCodeBlock(
+    VM& vm, UnlinkedFunctionExecutable* executable, const SourceCode& source,
+    CodeSpecializationKind kind, DebuggerMode debuggerMode, ProfilerMode profilerMode,
+    UnlinkedFunctionKind functionKind, ParserError& error, SourceParseMode parseMode)
+{
+    JSParserBuiltinMode builtinMode = executable->isBuiltinFunction() ? JSParserBuiltinMode::Builtin : JSParserBuiltinMode::NotBuiltin;
+    JSParserStrictMode strictMode = executable->isInStrictContext() ? JSParserStrictMode::Strict : JSParserStrictMode::NotStrict;
+    ASSERT(isFunctionParseMode(executable->parseMode()));
+    std::unique_ptr<FunctionNode> function = parse<FunctionNode>(
+        &vm, source, executable->name(), builtinMode, strictMode, executable->parseMode(), executable->superBinding(), error, nullptr);
+
+    if (!function) {
+        ASSERT(error.isValid());
+        return nullptr;
+    }
+
+    function->finishParsing(executable->name(), executable->functionMode());
+    executable->recordParse(function->features(), function->hasCapturedVariables());
+
+    bool isClassContext = executable->superBinding() == SuperBinding::Needed;
+
+    UnlinkedFunctionCodeBlock* result = UnlinkedFunctionCodeBlock::create(&vm, FunctionCode,
+        ExecutableInfo(function->usesEval(), function->isStrictMode(), kind == CodeForConstruct, functionKind == UnlinkedBuiltinFunction, executable->constructorKind(), executable->superBinding(), parseMode, executable->derivedContextType(), false, isClassContext));
+
+    auto generator(std::make_unique<BytecodeGenerator>(vm, function.get(), result, debuggerMode, profilerMode, executable->parentScopeTDZVariables()));
+    error = generator->generate();
+    if (error.isValid())
+        return nullptr;
+    return result;
+}
+
+UnlinkedFunctionExecutable::UnlinkedFunctionExecutable(VM* vm, Structure* structure, const SourceCode& source, RefPtr<SourceProvider>&& sourceOverride, FunctionMetadataNode* node, UnlinkedFunctionKind kind, ConstructAbility constructAbility, VariableEnvironment& parentScopeTDZVariables, DerivedContextType derivedContextType)
+    : Base(*vm, structure)
+    , m_firstLineOffset(node->firstLine() - source.firstLine())
+    , m_lineCount(node->lastLine() - node->firstLine())
+    , m_unlinkedFunctionNameStart(node->functionNameStart() - source.startOffset())
+    , m_unlinkedBodyStartColumn(node->startColumn())
+    , m_unlinkedBodyEndColumn(m_lineCount ? node->endColumn() : node->endColumn() - node->startColumn())
+    , m_startOffset(node->source().startOffset() - source.startOffset())
+    , m_sourceLength(node->source().length())
+    , m_parametersStartOffset(node->parametersStart())
+    , m_typeProfilingStartOffset(node->functionKeywordStart())
+    , m_typeProfilingEndOffset(node->startStartOffset() + node->source().length() - 1)
+    , m_parameterCount(node->parameterCount())
+    , m_features(0)
+    , m_isInStrictContext(node->isInStrictContext())
+    , m_hasCapturedVariables(false)
+    , m_isBuiltinFunction(kind == UnlinkedBuiltinFunction)
+    , m_constructAbility(static_cast<unsigned>(constructAbility))
+    , m_constructorKind(static_cast<unsigned>(node->constructorKind()))
+    , m_functionMode(node->functionMode())
+    , m_superBinding(static_cast<unsigned>(node->superBinding()))
+    , m_derivedContextType(static_cast<unsigned>(derivedContextType))
+    , m_sourceParseMode(static_cast<unsigned>(node->parseMode()))
+    , m_name(node->ident())
+    , m_inferredName(node->inferredName())
+    , m_sourceOverride(WTFMove(sourceOverride))
+{
+    ASSERT(m_constructorKind == static_cast<unsigned>(node->constructorKind()));
+    m_parentScopeTDZVariables.swap(parentScopeTDZVariables);
+}
+
+void UnlinkedFunctionExecutable::visitChildren(JSCell* cell, SlotVisitor& visitor)
+{
+    UnlinkedFunctionExecutable* thisObject = jsCast<UnlinkedFunctionExecutable*>(cell);
+    ASSERT_GC_OBJECT_INHERITS(thisObject, info());
+    Base::visitChildren(thisObject, visitor);
+    visitor.append(&thisObject->m_unlinkedCodeBlockForCall);
+    visitor.append(&thisObject->m_unlinkedCodeBlockForConstruct);
+    visitor.append(&thisObject->m_nameValue);
+}
+
+FunctionExecutable* UnlinkedFunctionExecutable::link(VM& vm, const SourceCode& ownerSource, int overrideLineNumber)
+{
+    SourceCode source = m_sourceOverride ? SourceCode(m_sourceOverride) : ownerSource;
+    unsigned firstLine = source.firstLine() + m_firstLineOffset;
+    unsigned startOffset = source.startOffset() + m_startOffset;
+    unsigned lineCount = m_lineCount;
+
+    // Adjust to one-based indexing.
+    bool startColumnIsOnFirstSourceLine = !m_firstLineOffset;
+    unsigned startColumn = m_unlinkedBodyStartColumn + (startColumnIsOnFirstSourceLine ? source.startColumn() : 1);
+    bool endColumnIsOnStartLine = !lineCount;
+    unsigned endColumn = m_unlinkedBodyEndColumn + (endColumnIsOnStartLine ? startColumn : 1);
+
+    SourceCode code(source.provider(), startOffset, startOffset + m_sourceLength, firstLine, startColumn);
+    FunctionOverrides::OverrideInfo overrideInfo;
+    bool hasFunctionOverride = false;
+
+    if (UNLIKELY(Options::functionOverrides())) {
+        hasFunctionOverride = FunctionOverrides::initializeOverrideFor(code, overrideInfo);
+        if (hasFunctionOverride) {
+            firstLine = overrideInfo.firstLine;
+            lineCount = overrideInfo.lineCount;
+            startColumn = overrideInfo.startColumn;
+            endColumn = overrideInfo.endColumn;
+            code = overrideInfo.sourceCode;
+        }
+    }
+
+    FunctionExecutable* result = FunctionExecutable::create(vm, code, this, firstLine, firstLine + lineCount, startColumn, endColumn);
+    if (overrideLineNumber != -1)
+        result->setOverrideLineNumber(overrideLineNumber);
+
+    if (UNLIKELY(hasFunctionOverride)) {
+        result->overrideParameterAndTypeProfilingStartEndOffsets(
+            overrideInfo.parametersStartOffset,
+            overrideInfo.typeProfilingStartOffset,
+            overrideInfo.typeProfilingEndOffset);
+    }
+
+    return result;
+}
+
+UnlinkedFunctionExecutable* UnlinkedFunctionExecutable::fromGlobalCode(
+    const Identifier& name, ExecState& exec, const SourceCode& source, 
+    JSObject*& exception, int overrideLineNumber)
+{
+    ParserError error;
+    VM& vm = exec.vm();
+    CodeCache* codeCache = vm.codeCache();
+    UnlinkedFunctionExecutable* executable = codeCache->getFunctionExecutableFromGlobalCode(vm, name, source, error);
+
+    auto& globalObject = *exec.lexicalGlobalObject();
+    if (globalObject.hasDebugger())
+        globalObject.debugger()->sourceParsed(&exec, source.provider(), error.line(), error.message());
+
+    if (error.isValid()) {
+        exception = error.toErrorObject(&globalObject, source, overrideLineNumber);
+        return nullptr;
+    }
+
+    return executable;
+}
+
+UnlinkedFunctionCodeBlock* UnlinkedFunctionExecutable::unlinkedCodeBlockFor(
+    VM& vm, const SourceCode& source, CodeSpecializationKind specializationKind, 
+    DebuggerMode debuggerMode, ProfilerMode profilerMode, ParserError& error, SourceParseMode parseMode)
+{
+    switch (specializationKind) {
+    case CodeForCall:
+        if (UnlinkedFunctionCodeBlock* codeBlock = m_unlinkedCodeBlockForCall.get())
+            return codeBlock;
+        break;
+    case CodeForConstruct:
+        if (UnlinkedFunctionCodeBlock* codeBlock = m_unlinkedCodeBlockForConstruct.get())
+            return codeBlock;
+        break;
+    }
+
+    UnlinkedFunctionCodeBlock* result = generateUnlinkedFunctionCodeBlock(
+        vm, this, source, specializationKind, debuggerMode, profilerMode, 
+        isBuiltinFunction() ? UnlinkedBuiltinFunction : UnlinkedNormalFunction, 
+        error, parseMode);
+    
+    if (error.isValid())
+        return nullptr;
+
+    switch (specializationKind) {
+    case CodeForCall:
+        m_unlinkedCodeBlockForCall.set(vm, this, result);
+        break;
+    case CodeForConstruct:
+        m_unlinkedCodeBlockForConstruct.set(vm, this, result);
+        break;
+    }
+    return result;
+}
+
+void UnlinkedFunctionExecutable::setInvalidTypeProfilingOffsets()
+{
+    m_typeProfilingStartOffset = std::numeric_limits<unsigned>::max();
+    m_typeProfilingEndOffset = std::numeric_limits<unsigned>::max();
+}
+
+} // namespace JSC