| /* |
| * Copyright (C) 2008-2019 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. |
| */ |
| |
| #pragma once |
| |
| #include "JSCJSValue.h" |
| #include <wtf/Assertions.h> |
| #include <wtf/VectorTraits.h> |
| |
| namespace JSC { |
| |
| class CallFrame; |
| class CodeBlock; |
| class JSLexicalEnvironment; |
| class JSObject; |
| class JSScope; |
| |
| class Register { |
| WTF_MAKE_FAST_ALLOCATED; |
| public: |
| Register(); |
| |
| Register(const JSValue&); |
| JSValue jsValue() const; |
| JSValue asanUnsafeJSValue() const; |
| EncodedJSValue encodedJSValue() const; |
| |
| ALWAYS_INLINE Register& operator=(CallFrame*); |
| ALWAYS_INLINE Register& operator=(CodeBlock*); |
| ALWAYS_INLINE Register& operator=(JSScope*); |
| ALWAYS_INLINE Register& operator=(JSCell*); |
| ALWAYS_INLINE Register& operator=(EncodedJSValue); |
| |
| int32_t i() const; |
| ALWAYS_INLINE CallFrame* callFrame() const; |
| ALWAYS_INLINE CodeBlock* codeBlock() const; |
| ALWAYS_INLINE CodeBlock* asanUnsafeCodeBlock() const; |
| ALWAYS_INLINE JSObject* object() const; |
| ALWAYS_INLINE JSScope* scope() const; |
| int32_t unboxedInt32() const; |
| uint32_t unboxedUInt32() const; |
| int32_t asanUnsafeUnboxedInt32() const; |
| int64_t unboxedInt52() const; |
| int64_t asanUnsafeUnboxedInt52() const; |
| int64_t unboxedStrictInt52() const; |
| int64_t asanUnsafeUnboxedStrictInt52() const; |
| int64_t unboxedInt64() const; |
| int64_t asanUnsafeUnboxedInt64() const; |
| bool unboxedBoolean() const; |
| double unboxedDouble() const; |
| double asanUnsafeUnboxedDouble() const; |
| JSCell* unboxedCell() const; |
| JSCell* asanUnsafeUnboxedCell() const; |
| int32_t payload() const; |
| int32_t tag() const; |
| int32_t unsafePayload() const; |
| int32_t unsafeTag() const; |
| int32_t& payload(); |
| int32_t& tag(); |
| |
| void* pointer() const; |
| void* asanUnsafePointer() const; |
| |
| static Register withInt(int32_t i) |
| { |
| Register r = jsNumber(i); |
| return r; |
| } |
| |
| private: |
| union { |
| EncodedJSValue value; |
| CallFrame* callFrame; |
| CodeBlock* codeBlock; |
| EncodedValueDescriptor encodedValue; |
| double number; |
| int64_t integer; |
| } u; |
| }; |
| |
| ALWAYS_INLINE Register::Register() |
| { |
| #ifndef NDEBUG |
| *this = JSValue(); |
| #endif |
| } |
| |
| ALWAYS_INLINE Register::Register(const JSValue& v) |
| { |
| u.value = JSValue::encode(v); |
| } |
| |
| // FIXME (rdar://problem/19379214): ASan only needs to be suppressed for Register::jsValue() when called from prepareOSREntry(), but there is currently no way to express this short of adding a separate copy of the function. |
| SUPPRESS_ASAN ALWAYS_INLINE JSValue Register::asanUnsafeJSValue() const |
| { |
| return JSValue::decode(u.value); |
| } |
| |
| ALWAYS_INLINE JSValue Register::jsValue() const |
| { |
| return JSValue::decode(u.value); |
| } |
| |
| ALWAYS_INLINE EncodedJSValue Register::encodedJSValue() const |
| { |
| return u.value; |
| } |
| |
| // Interpreter functions |
| |
| ALWAYS_INLINE int32_t Register::i() const |
| { |
| return jsValue().asInt32(); |
| } |
| |
| ALWAYS_INLINE int32_t Register::unboxedInt32() const |
| { |
| return payload(); |
| } |
| |
| ALWAYS_INLINE uint32_t Register::unboxedUInt32() const |
| { |
| return static_cast<uint32_t>(unboxedInt32()); |
| } |
| |
| SUPPRESS_ASAN ALWAYS_INLINE int32_t Register::asanUnsafeUnboxedInt32() const |
| { |
| return unsafePayload(); |
| } |
| |
| ALWAYS_INLINE int64_t Register::unboxedInt52() const |
| { |
| return u.integer >> JSValue::int52ShiftAmount; |
| } |
| |
| SUPPRESS_ASAN ALWAYS_INLINE int64_t Register::asanUnsafeUnboxedInt52() const |
| { |
| return u.integer >> JSValue::int52ShiftAmount; |
| } |
| |
| ALWAYS_INLINE int64_t Register::unboxedStrictInt52() const |
| { |
| return u.integer; |
| } |
| |
| SUPPRESS_ASAN ALWAYS_INLINE int64_t Register::asanUnsafeUnboxedStrictInt52() const |
| { |
| return u.integer; |
| } |
| |
| ALWAYS_INLINE int64_t Register::unboxedInt64() const |
| { |
| return u.integer; |
| } |
| |
| SUPPRESS_ASAN ALWAYS_INLINE int64_t Register::asanUnsafeUnboxedInt64() const |
| { |
| return u.integer; |
| } |
| |
| ALWAYS_INLINE bool Register::unboxedBoolean() const |
| { |
| return !!payload(); |
| } |
| |
| ALWAYS_INLINE double Register::unboxedDouble() const |
| { |
| return u.number; |
| } |
| |
| SUPPRESS_ASAN ALWAYS_INLINE double Register::asanUnsafeUnboxedDouble() const |
| { |
| return u.number; |
| } |
| |
| ALWAYS_INLINE JSCell* Register::unboxedCell() const |
| { |
| #if USE(JSVALUE64) |
| return u.encodedValue.ptr; |
| #else |
| return bitwise_cast<JSCell*>(payload()); |
| #endif |
| } |
| |
| SUPPRESS_ASAN ALWAYS_INLINE JSCell* Register::asanUnsafeUnboxedCell() const |
| { |
| #if USE(JSVALUE64) |
| return u.encodedValue.ptr; |
| #else |
| return bitwise_cast<JSCell*>(payload()); |
| #endif |
| } |
| |
| ALWAYS_INLINE void* Register::pointer() const |
| { |
| #if USE(JSVALUE64) |
| return u.encodedValue.ptr; |
| #else |
| return bitwise_cast<void*>(payload()); |
| #endif |
| } |
| |
| SUPPRESS_ASAN ALWAYS_INLINE void* Register::asanUnsafePointer() const |
| { |
| #if USE(JSVALUE64) |
| return u.encodedValue.ptr; |
| #else |
| return bitwise_cast<void*>(unsafePayload()); |
| #endif |
| } |
| |
| ALWAYS_INLINE int32_t Register::payload() const |
| { |
| return u.encodedValue.asBits.payload; |
| } |
| |
| ALWAYS_INLINE int32_t Register::tag() const |
| { |
| return u.encodedValue.asBits.tag; |
| } |
| |
| SUPPRESS_ASAN ALWAYS_INLINE int32_t Register::unsafePayload() const |
| { |
| return u.encodedValue.asBits.payload; |
| } |
| |
| SUPPRESS_ASAN ALWAYS_INLINE int32_t Register::unsafeTag() const |
| { |
| return u.encodedValue.asBits.tag; |
| } |
| |
| ALWAYS_INLINE int32_t& Register::payload() |
| { |
| return u.encodedValue.asBits.payload; |
| } |
| |
| ALWAYS_INLINE int32_t& Register::tag() |
| { |
| return u.encodedValue.asBits.tag; |
| } |
| |
| } // namespace JSC |
| |
| namespace WTF { |
| |
| template<> struct VectorTraits<JSC::Register> : VectorTraitsBase<true, JSC::Register> { }; |
| |
| } // namespace WTF |
