Imported WebKit commit bb52bf3c0119e8a128cd93afe5572413a8617de9 (http://svn.webkit.org/repository/webkit/trunk@108790)

1 files changed, 116 insertions, 0 deletions

diff --git a/Source/JavaScriptCore/llint/LLIntData.cpp b/Source/JavaScriptCore/llint/LLIntData.cpp
new file mode 100644
index 000000000..c0fe78142
--- /dev/null
+++ b/Source/JavaScriptCore/llint/LLIntData.cpp
@@ -0,0 +1,116 @@
+/*
+ * Copyright (C) 2011 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 "LLIntData.h"
+
+#if ENABLE(LLINT)
+
+#include "BytecodeConventions.h"
+#include "CodeType.h"
+#include "Instruction.h"
+#include "LowLevelInterpreter.h"
+#include "Opcode.h"
+
+namespace JSC { namespace LLInt {
+
+Data::Data()
+    : m_exceptionInstructions(new Instruction[maxOpcodeLength + 1])
+    , m_opcodeMap(new Opcode[numOpcodeIDs])
+{
+    for (int i = 0; i < maxOpcodeLength + 1; ++i)
+        m_exceptionInstructions[i].u.pointer = bitwise_cast<void*>(&llint_throw_from_slow_path_trampoline);
+#define OPCODE_ENTRY(opcode, length) m_opcodeMap[opcode] = bitwise_cast<void*>(&llint_##opcode);
+    FOR_EACH_OPCODE_ID(OPCODE_ENTRY);
+#undef OPCODE_ENTRY
+}
+
+#if COMPILER(CLANG)
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wmissing-noreturn"
+#endif
+void Data::performAssertions(JSGlobalData& globalData)
+{
+    UNUSED_PARAM(globalData);
+    
+    // Assertions to match LowLevelInterpreter.asm.  If you change any of this code, be
+    // prepared to change LowLevelInterpreter.asm as well!!
+    ASSERT(RegisterFile::CallFrameHeaderSize * 8 == 48);
+    ASSERT(RegisterFile::ArgumentCount * 8 == -48);
+    ASSERT(RegisterFile::CallerFrame * 8 == -40);
+    ASSERT(RegisterFile::Callee * 8 == -32);
+    ASSERT(RegisterFile::ScopeChain * 8 == -24);
+    ASSERT(RegisterFile::ReturnPC * 8 == -16);
+    ASSERT(RegisterFile::CodeBlock * 8 == -8);
+    ASSERT(CallFrame::argumentOffsetIncludingThis(0) == -RegisterFile::CallFrameHeaderSize - 1);
+#if CPU(BIG_ENDIAN)
+    ASSERT(OBJECT_OFFSETOF(EncodedValueDescriptor, asBits.tag) == 0);
+    ASSERT(OBJECT_OFFSETOF(EncodedValueDescriptor, asBits.payload) == 4);
+#else
+    ASSERT(OBJECT_OFFSETOF(EncodedValueDescriptor, asBits.tag) == 4);
+    ASSERT(OBJECT_OFFSETOF(EncodedValueDescriptor, asBits.payload) == 0);
+#endif
+    ASSERT(JSValue::Int32Tag == -1);
+    ASSERT(JSValue::BooleanTag == -2);
+    ASSERT(JSValue::NullTag == -3);
+    ASSERT(JSValue::UndefinedTag == -4);
+    ASSERT(JSValue::CellTag == -5);
+    ASSERT(JSValue::EmptyValueTag == -6);
+    ASSERT(JSValue::DeletedValueTag == -7);
+    ASSERT(JSValue::LowestTag == -7);
+    ASSERT(StringType == 5);
+    ASSERT(ObjectType == 13);
+    ASSERT(MasqueradesAsUndefined == 1);
+    ASSERT(ImplementsHasInstance == 2);
+    ASSERT(ImplementsDefaultHasInstance == 8);
+    ASSERT(&globalData.heap.allocatorForObjectWithoutDestructor(sizeof(JSFinalObject)) - &globalData.heap.firstAllocatorWithoutDestructors() == 3);
+    ASSERT(FirstConstantRegisterIndex == 0x40000000);
+    ASSERT(GlobalCode == 0);
+    ASSERT(EvalCode == 1);
+    ASSERT(FunctionCode == 2);
+    
+    // FIXME: make these assertions less horrible.
+#if !ASSERT_DISABLED
+    Vector<int> testVector;
+    testVector.resize(42);
+    ASSERT(bitwise_cast<size_t*>(&testVector)[0] == 42);
+    ASSERT(bitwise_cast<int**>(&testVector)[1] == testVector.begin());
+#endif
+
+    ASSERT(StringImpl::s_hashFlag8BitBuffer == 64);
+}
+#if COMPILER(CLANG)
+#pragma clang diagnostic pop
+#endif
+
+Data::~Data()
+{
+    delete[] m_exceptionInstructions;
+    delete[] m_opcodeMap;
+}
+
+} } // namespace JSC::LLInt
+
+#endif // ENABLE(LLINT)