- DEFINE_OPCODE(op_nstricteq) {
- /* nstricteq dst(r) src1(r) src2(r)
-
- Checks whether register src1 and register src2 are not
- strictly equal, as with the ECMAScript '!==' operator, and
- puts the result as a boolean in register dst.
- */
- int dst = vPC[1].u.operand;
- JSValue src1 = callFrame->r(vPC[2].u.operand).jsValue();
- JSValue src2 = callFrame->r(vPC[3].u.operand).jsValue();
- bool result = !JSValue::strictEqual(callFrame, src1, src2);
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(dst) = jsBoolean(result);
-
- vPC += OPCODE_LENGTH(op_nstricteq);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_less) {
- /* less dst(r) src1(r) src2(r)
-
- Checks whether register src1 is less than register src2, as
- with the ECMAScript '<' operator, and puts the result as
- a boolean in register dst.
- */
- int dst = vPC[1].u.operand;
- JSValue src1 = callFrame->r(vPC[2].u.operand).jsValue();
- JSValue src2 = callFrame->r(vPC[3].u.operand).jsValue();
- JSValue result = jsBoolean(jsLess(callFrame, src1, src2));
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(dst) = result;
-
- vPC += OPCODE_LENGTH(op_less);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_lesseq) {
- /* lesseq dst(r) src1(r) src2(r)
-
- Checks whether register src1 is less than or equal to
- register src2, as with the ECMAScript '<=' operator, and
- puts the result as a boolean in register dst.
- */
- int dst = vPC[1].u.operand;
- JSValue src1 = callFrame->r(vPC[2].u.operand).jsValue();
- JSValue src2 = callFrame->r(vPC[3].u.operand).jsValue();
- JSValue result = jsBoolean(jsLessEq(callFrame, src1, src2));
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(dst) = result;
-
- vPC += OPCODE_LENGTH(op_lesseq);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_pre_inc) {
- /* pre_inc srcDst(r)
-
- Converts register srcDst to number, adds one, and puts the result
- back in register srcDst.
- */
- int srcDst = vPC[1].u.operand;
- JSValue v = callFrame->r(srcDst).jsValue();
- if (v.isInt32() && v.asInt32() < INT_MAX)
- callFrame->uncheckedR(srcDst) = jsNumber(v.asInt32() + 1);
- else {
- JSValue result = jsNumber(v.toNumber(callFrame) + 1);
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(srcDst) = result;
- }
-
- vPC += OPCODE_LENGTH(op_pre_inc);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_pre_dec) {
- /* pre_dec srcDst(r)
-
- Converts register srcDst to number, subtracts one, and puts the result
- back in register srcDst.
- */
- int srcDst = vPC[1].u.operand;
- JSValue v = callFrame->r(srcDst).jsValue();
- if (v.isInt32() && v.asInt32() > INT_MIN)
- callFrame->uncheckedR(srcDst) = jsNumber(v.asInt32() - 1);
- else {
- JSValue result = jsNumber(v.toNumber(callFrame) - 1);
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(srcDst) = result;
- }
-
- vPC += OPCODE_LENGTH(op_pre_dec);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_post_inc) {
- /* post_inc dst(r) srcDst(r)
-
- Converts register srcDst to number. The number itself is
- written to register dst, and the number plus one is written
- back to register srcDst.
- */
- int dst = vPC[1].u.operand;
- int srcDst = vPC[2].u.operand;
- JSValue v = callFrame->r(srcDst).jsValue();
- if (v.isInt32() && v.asInt32() < INT_MAX) {
- callFrame->uncheckedR(srcDst) = jsNumber(v.asInt32() + 1);
- callFrame->uncheckedR(dst) = v;
- } else {
- JSValue number = callFrame->r(srcDst).jsValue().toJSNumber(callFrame);
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(srcDst) = jsNumber(number.uncheckedGetNumber() + 1);
- callFrame->uncheckedR(dst) = number;
- }
-
- vPC += OPCODE_LENGTH(op_post_inc);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_post_dec) {
- /* post_dec dst(r) srcDst(r)
-
- Converts register srcDst to number. The number itself is
- written to register dst, and the number minus one is written
- back to register srcDst.
- */
- int dst = vPC[1].u.operand;
- int srcDst = vPC[2].u.operand;
- JSValue v = callFrame->r(srcDst).jsValue();
- if (v.isInt32() && v.asInt32() > INT_MIN) {
- callFrame->uncheckedR(srcDst) = jsNumber(v.asInt32() - 1);
- callFrame->uncheckedR(dst) = v;
- } else {
- JSValue number = callFrame->r(srcDst).jsValue().toJSNumber(callFrame);
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(srcDst) = jsNumber(number.uncheckedGetNumber() - 1);
- callFrame->uncheckedR(dst) = number;
- }
-
- vPC += OPCODE_LENGTH(op_post_dec);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_to_jsnumber) {
- /* to_jsnumber dst(r) src(r)
-
- Converts register src to number, and puts the result
- in register dst.
- */
- int dst = vPC[1].u.operand;
- int src = vPC[2].u.operand;
-
- JSValue srcVal = callFrame->r(src).jsValue();
-
- if (LIKELY(srcVal.isNumber()))
- callFrame->uncheckedR(dst) = callFrame->r(src);
- else {
- JSValue result = srcVal.toJSNumber(callFrame);
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(dst) = result;
- }
-
- vPC += OPCODE_LENGTH(op_to_jsnumber);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_negate) {
- /* negate dst(r) src(r)
-
- Converts register src to number, negates it, and puts the
- result in register dst.
- */
- int dst = vPC[1].u.operand;
- JSValue src = callFrame->r(vPC[2].u.operand).jsValue();
- if (src.isInt32() && (src.asInt32() & 0x7fffffff)) // non-zero and no overflow
- callFrame->uncheckedR(dst) = jsNumber(-src.asInt32());
- else {
- JSValue result = jsNumber(-src.toNumber(callFrame));
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(dst) = result;
- }
-
- vPC += OPCODE_LENGTH(op_negate);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_add) {
- /* add dst(r) src1(r) src2(r)
-
- Adds register src1 and register src2, and puts the result
- in register dst. (JS add may be string concatenation or
- numeric add, depending on the types of the operands.)
- */
- int dst = vPC[1].u.operand;
- JSValue src1 = callFrame->r(vPC[2].u.operand).jsValue();
- JSValue src2 = callFrame->r(vPC[3].u.operand).jsValue();
- if (src1.isInt32() && src2.isInt32() && !(src1.asInt32() | (src2.asInt32() & 0xc0000000))) // no overflow
- callFrame->uncheckedR(dst) = jsNumber(src1.asInt32() + src2.asInt32());
- else {
- JSValue result = jsAdd(callFrame, src1, src2);
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(dst) = result;
- }
- vPC += OPCODE_LENGTH(op_add);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_mul) {
- /* mul dst(r) src1(r) src2(r)
-
- Multiplies register src1 and register src2 (converted to
- numbers), and puts the product in register dst.
- */
- int dst = vPC[1].u.operand;
- JSValue src1 = callFrame->r(vPC[2].u.operand).jsValue();
- JSValue src2 = callFrame->r(vPC[3].u.operand).jsValue();
- if (src1.isInt32() && src2.isInt32() && !(src1.asInt32() | src2.asInt32() >> 15)) // no overflow
- callFrame->uncheckedR(dst) = jsNumber(src1.asInt32() * src2.asInt32());
- else {
- JSValue result = jsNumber(src1.toNumber(callFrame) * src2.toNumber(callFrame));
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(dst) = result;
- }
-
- vPC += OPCODE_LENGTH(op_mul);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_div) {
- /* div dst(r) dividend(r) divisor(r)
-
- Divides register dividend (converted to number) by the
- register divisor (converted to number), and puts the
- quotient in register dst.
- */
- int dst = vPC[1].u.operand;
- JSValue dividend = callFrame->r(vPC[2].u.operand).jsValue();
- JSValue divisor = callFrame->r(vPC[3].u.operand).jsValue();
-
- JSValue result = jsNumber(dividend.toNumber(callFrame) / divisor.toNumber(callFrame));
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(dst) = result;
-
- vPC += OPCODE_LENGTH(op_div);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_mod) {
- /* mod dst(r) dividend(r) divisor(r)
-
- Divides register dividend (converted to number) by
- register divisor (converted to number), and puts the
- remainder in register dst.
- */
- int dst = vPC[1].u.operand;
- JSValue dividend = callFrame->r(vPC[2].u.operand).jsValue();
- JSValue divisor = callFrame->r(vPC[3].u.operand).jsValue();
-
- if (dividend.isInt32() && divisor.isInt32() && divisor.asInt32() != 0) {
- JSValue result = jsNumber(dividend.asInt32() % divisor.asInt32());
- ASSERT(result);
- callFrame->uncheckedR(dst) = result;
- vPC += OPCODE_LENGTH(op_mod);
- NEXT_INSTRUCTION();
- }
-
- // Conversion to double must happen outside the call to fmod since the
- // order of argument evaluation is not guaranteed.
- double d1 = dividend.toNumber(callFrame);
- double d2 = divisor.toNumber(callFrame);
- JSValue result = jsNumber(fmod(d1, d2));
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(dst) = result;
- vPC += OPCODE_LENGTH(op_mod);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_sub) {
- /* sub dst(r) src1(r) src2(r)
-
- Subtracts register src2 (converted to number) from register
- src1 (converted to number), and puts the difference in
- register dst.
- */
- int dst = vPC[1].u.operand;
- JSValue src1 = callFrame->r(vPC[2].u.operand).jsValue();
- JSValue src2 = callFrame->r(vPC[3].u.operand).jsValue();
- if (src1.isInt32() && src2.isInt32() && !(src1.asInt32() | (src2.asInt32() & 0xc0000000))) // no overflow
- callFrame->uncheckedR(dst) = jsNumber(src1.asInt32() - src2.asInt32());
- else {
- JSValue result = jsNumber(src1.toNumber(callFrame) - src2.toNumber(callFrame));
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(dst) = result;
- }
- vPC += OPCODE_LENGTH(op_sub);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_lshift) {
- /* lshift dst(r) val(r) shift(r)
-
- Performs left shift of register val (converted to int32) by
- register shift (converted to uint32), and puts the result
- in register dst.
- */
- int dst = vPC[1].u.operand;
- JSValue val = callFrame->r(vPC[2].u.operand).jsValue();
- JSValue shift = callFrame->r(vPC[3].u.operand).jsValue();
-
- if (val.isInt32() && shift.isInt32())
- callFrame->uncheckedR(dst) = jsNumber(val.asInt32() << (shift.asInt32() & 0x1f));
- else {
- JSValue result = jsNumber((val.toInt32(callFrame)) << (shift.toUInt32(callFrame) & 0x1f));
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(dst) = result;
- }
-
- vPC += OPCODE_LENGTH(op_lshift);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_rshift) {
- /* rshift dst(r) val(r) shift(r)
-
- Performs arithmetic right shift of register val (converted
- to int32) by register shift (converted to
- uint32), and puts the result in register dst.
- */
- int dst = vPC[1].u.operand;
- JSValue val = callFrame->r(vPC[2].u.operand).jsValue();
- JSValue shift = callFrame->r(vPC[3].u.operand).jsValue();
-
- if (val.isInt32() && shift.isInt32())
- callFrame->uncheckedR(dst) = jsNumber(val.asInt32() >> (shift.asInt32() & 0x1f));
- else {
- JSValue result = jsNumber((val.toInt32(callFrame)) >> (shift.toUInt32(callFrame) & 0x1f));
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(dst) = result;
- }
-
- vPC += OPCODE_LENGTH(op_rshift);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_urshift) {
- /* rshift dst(r) val(r) shift(r)
-
- Performs logical right shift of register val (converted
- to uint32) by register shift (converted to
- uint32), and puts the result in register dst.
- */
- int dst = vPC[1].u.operand;
- JSValue val = callFrame->r(vPC[2].u.operand).jsValue();
- JSValue shift = callFrame->r(vPC[3].u.operand).jsValue();
- if (val.isUInt32() && shift.isInt32())
- callFrame->uncheckedR(dst) = jsNumber(val.asInt32() >> (shift.asInt32() & 0x1f));
- else {
- JSValue result = jsNumber((val.toUInt32(callFrame)) >> (shift.toUInt32(callFrame) & 0x1f));
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(dst) = result;
- }
-
- vPC += OPCODE_LENGTH(op_urshift);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_bitand) {
- /* bitand dst(r) src1(r) src2(r)
-
- Computes bitwise AND of register src1 (converted to int32)
- and register src2 (converted to int32), and puts the result
- in register dst.
- */
- int dst = vPC[1].u.operand;
- JSValue src1 = callFrame->r(vPC[2].u.operand).jsValue();
- JSValue src2 = callFrame->r(vPC[3].u.operand).jsValue();
- if (src1.isInt32() && src2.isInt32())
- callFrame->uncheckedR(dst) = jsNumber(src1.asInt32() & src2.asInt32());
- else {
- JSValue result = jsNumber(src1.toInt32(callFrame) & src2.toInt32(callFrame));
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(dst) = result;
- }
-
- vPC += OPCODE_LENGTH(op_bitand);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_bitxor) {
- /* bitxor dst(r) src1(r) src2(r)
-
- Computes bitwise XOR of register src1 (converted to int32)
- and register src2 (converted to int32), and puts the result
- in register dst.
- */
- int dst = vPC[1].u.operand;
- JSValue src1 = callFrame->r(vPC[2].u.operand).jsValue();
- JSValue src2 = callFrame->r(vPC[3].u.operand).jsValue();
- if (src1.isInt32() && src2.isInt32())
- callFrame->uncheckedR(dst) = jsNumber(src1.asInt32() ^ src2.asInt32());
- else {
- JSValue result = jsNumber(src1.toInt32(callFrame) ^ src2.toInt32(callFrame));
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(dst) = result;
- }
-
- vPC += OPCODE_LENGTH(op_bitxor);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_bitor) {
- /* bitor dst(r) src1(r) src2(r)
-
- Computes bitwise OR of register src1 (converted to int32)
- and register src2 (converted to int32), and puts the
- result in register dst.
- */
- int dst = vPC[1].u.operand;
- JSValue src1 = callFrame->r(vPC[2].u.operand).jsValue();
- JSValue src2 = callFrame->r(vPC[3].u.operand).jsValue();
- if (src1.isInt32() && src2.isInt32())
- callFrame->uncheckedR(dst) = jsNumber(src1.asInt32() | src2.asInt32());
- else {
- JSValue result = jsNumber(src1.toInt32(callFrame) | src2.toInt32(callFrame));
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(dst) = result;
- }
-
- vPC += OPCODE_LENGTH(op_bitor);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_bitnot) {
- /* bitnot dst(r) src(r)
-
- Computes bitwise NOT of register src1 (converted to int32),
- and puts the result in register dst.
- */
- int dst = vPC[1].u.operand;
- JSValue src = callFrame->r(vPC[2].u.operand).jsValue();
- if (src.isInt32())
- callFrame->uncheckedR(dst) = jsNumber(~src.asInt32());
- else {
- JSValue result = jsNumber(~src.toInt32(callFrame));
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(dst) = result;
- }
- vPC += OPCODE_LENGTH(op_bitnot);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_not) {
- /* not dst(r) src(r)
-
- Computes logical NOT of register src (converted to
- boolean), and puts the result in register dst.
- */
- int dst = vPC[1].u.operand;
- int src = vPC[2].u.operand;
- JSValue result = jsBoolean(!callFrame->r(src).jsValue().toBoolean(callFrame));
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(dst) = result;
-
- vPC += OPCODE_LENGTH(op_not);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_check_has_instance) {
- /* check_has_instance constructor(r)
-
- Check 'constructor' is an object with the internal property
- [HasInstance] (i.e. is a function ... *shakes head sadly at
- JSC API*). Raises an exception if register constructor is not
- an valid parameter for instanceof.
- */
- int base = vPC[1].u.operand;
- JSValue baseVal = callFrame->r(base).jsValue();
-
- if (isInvalidParamForInstanceOf(callFrame, baseVal, exceptionValue))
- goto vm_throw;
-
- vPC += OPCODE_LENGTH(op_check_has_instance);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_instanceof) {
- /* instanceof dst(r) value(r) constructor(r) constructorProto(r)
-
- Tests whether register value is an instance of register
- constructor, and puts the boolean result in register
- dst. Register constructorProto must contain the "prototype"
- property (not the actual prototype) of the object in
- register constructor. This lookup is separated so that
- polymorphic inline caching can apply.
-
- Raises an exception if register constructor is not an
- object.
- */
- int dst = vPC[1].u.operand;
- int value = vPC[2].u.operand;
- int base = vPC[3].u.operand;
- int baseProto = vPC[4].u.operand;
-
- JSValue baseVal = callFrame->r(base).jsValue();
-
- ASSERT(!isInvalidParamForInstanceOf(callFrame, baseVal, exceptionValue));
-
- bool result = asObject(baseVal)->hasInstance(callFrame, callFrame->r(value).jsValue(), callFrame->r(baseProto).jsValue());
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(dst) = jsBoolean(result);
-
- vPC += OPCODE_LENGTH(op_instanceof);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_typeof) {
- /* typeof dst(r) src(r)
-
- Determines the type string for src according to ECMAScript
- rules, and puts the result in register dst.
- */
- int dst = vPC[1].u.operand;
- int src = vPC[2].u.operand;
- callFrame->uncheckedR(dst) = JSValue(jsTypeStringForValue(callFrame, callFrame->r(src).jsValue()));
-
- vPC += OPCODE_LENGTH(op_typeof);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_is_undefined) {
- /* is_undefined dst(r) src(r)
-
- Determines whether the type string for src according to
- the ECMAScript rules is "undefined", and puts the result
- in register dst.
- */
- int dst = vPC[1].u.operand;
- int src = vPC[2].u.operand;
- JSValue v = callFrame->r(src).jsValue();
- callFrame->uncheckedR(dst) = jsBoolean(v.isCell() ? v.asCell()->structure()->typeInfo().masqueradesAsUndefined() : v.isUndefined());
-
- vPC += OPCODE_LENGTH(op_is_undefined);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_is_boolean) {
- /* is_boolean dst(r) src(r)
-
- Determines whether the type string for src according to
- the ECMAScript rules is "boolean", and puts the result
- in register dst.
- */
- int dst = vPC[1].u.operand;
- int src = vPC[2].u.operand;
- callFrame->uncheckedR(dst) = jsBoolean(callFrame->r(src).jsValue().isBoolean());
-
- vPC += OPCODE_LENGTH(op_is_boolean);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_is_number) {
- /* is_number dst(r) src(r)
-
- Determines whether the type string for src according to
- the ECMAScript rules is "number", and puts the result
- in register dst.
- */
- int dst = vPC[1].u.operand;
- int src = vPC[2].u.operand;
- callFrame->uncheckedR(dst) = jsBoolean(callFrame->r(src).jsValue().isNumber());
-
- vPC += OPCODE_LENGTH(op_is_number);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_is_string) {
- /* is_string dst(r) src(r)
-
- Determines whether the type string for src according to
- the ECMAScript rules is "string", and puts the result
- in register dst.
- */
- int dst = vPC[1].u.operand;
- int src = vPC[2].u.operand;
- callFrame->uncheckedR(dst) = jsBoolean(callFrame->r(src).jsValue().isString());
-
- vPC += OPCODE_LENGTH(op_is_string);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_is_object) {
- /* is_object dst(r) src(r)
-
- Determines whether the type string for src according to
- the ECMAScript rules is "object", and puts the result
- in register dst.
- */
- int dst = vPC[1].u.operand;
- int src = vPC[2].u.operand;
- callFrame->uncheckedR(dst) = jsBoolean(jsIsObjectType(callFrame->r(src).jsValue()));
-
- vPC += OPCODE_LENGTH(op_is_object);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_is_function) {
- /* is_function dst(r) src(r)
-
- Determines whether the type string for src according to
- the ECMAScript rules is "function", and puts the result
- in register dst.
- */
- int dst = vPC[1].u.operand;
- int src = vPC[2].u.operand;
- callFrame->uncheckedR(dst) = jsBoolean(jsIsFunctionType(callFrame->r(src).jsValue()));
-
- vPC += OPCODE_LENGTH(op_is_function);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_in) {
- /* in dst(r) property(r) base(r)
-
- Tests whether register base has a property named register
- property, and puts the boolean result in register dst.
-
- Raises an exception if register constructor is not an
- object.
- */
- int dst = vPC[1].u.operand;
- int property = vPC[2].u.operand;
- int base = vPC[3].u.operand;
-
- JSValue baseVal = callFrame->r(base).jsValue();
- if (isInvalidParamForIn(callFrame, baseVal, exceptionValue))
- goto vm_throw;
-
- JSObject* baseObj = asObject(baseVal);
-
- JSValue propName = callFrame->r(property).jsValue();
-
- uint32_t i;
- if (propName.getUInt32(i))
- callFrame->uncheckedR(dst) = jsBoolean(baseObj->hasProperty(callFrame, i));
- else {
- Identifier property(callFrame, propName.toString(callFrame));
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(dst) = jsBoolean(baseObj->hasProperty(callFrame, property));
- }
-
- vPC += OPCODE_LENGTH(op_in);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_resolve) {
- /* resolve dst(r) property(id)
-
- Looks up the property named by identifier property in the
- scope chain, and writes the resulting value to register
- dst. If the property is not found, raises an exception.
- */
- if (UNLIKELY(!resolve(callFrame, vPC, exceptionValue)))
- goto vm_throw;
-
- vPC += OPCODE_LENGTH(op_resolve);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_resolve_skip) {
- /* resolve_skip dst(r) property(id) skip(n)
-
- Looks up the property named by identifier property in the
- scope chain skipping the top 'skip' levels, and writes the resulting
- value to register dst. If the property is not found, raises an exception.
- */
- if (UNLIKELY(!resolveSkip(callFrame, vPC, exceptionValue)))
- goto vm_throw;
-
- vPC += OPCODE_LENGTH(op_resolve_skip);
-
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_resolve_global) {
- /* resolve_skip dst(r) globalObject(c) property(id) structure(sID) offset(n)
-
- Performs a dynamic property lookup for the given property, on the provided
- global object. If structure matches the Structure of the global then perform
- a fast lookup using the case offset, otherwise fall back to a full resolve and
- cache the new structure and offset
- */
- if (UNLIKELY(!resolveGlobal(callFrame, vPC, exceptionValue)))
- goto vm_throw;
-
- vPC += OPCODE_LENGTH(op_resolve_global);
-
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_resolve_global_dynamic) {
- /* resolve_skip dst(r) globalObject(c) property(id) structure(sID) offset(n), depth(n)
-
- Performs a dynamic property lookup for the given property, on the provided
- global object. If structure matches the Structure of the global then perform
- a fast lookup using the case offset, otherwise fall back to a full resolve and
- cache the new structure and offset.
-
- This walks through n levels of the scope chain to verify that none of those levels
- in the scope chain include dynamically added properties.
- */
- if (UNLIKELY(!resolveGlobalDynamic(callFrame, vPC, exceptionValue)))
- goto vm_throw;
-
- vPC += OPCODE_LENGTH(op_resolve_global_dynamic);
-
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_get_global_var) {
- /* get_global_var dst(r) globalObject(c) index(n)
-
- Gets the global var at global slot index and places it in register dst.
- */
- int dst = vPC[1].u.operand;
- JSGlobalObject* scope = codeBlock->globalObject();
- ASSERT(scope->isGlobalObject());
- int index = vPC[2].u.operand;
-
- callFrame->uncheckedR(dst) = scope->registerAt(index).get();
- vPC += OPCODE_LENGTH(op_get_global_var);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_put_global_var) {
- /* put_global_var globalObject(c) index(n) value(r)
-
- Puts value into global slot index.
- */
- JSGlobalObject* scope = codeBlock->globalObject();
- ASSERT(scope->isGlobalObject());
- int index = vPC[1].u.operand;
- int value = vPC[2].u.operand;
-
- scope->registerAt(index).set(*globalData, scope, callFrame->r(value).jsValue());
- vPC += OPCODE_LENGTH(op_put_global_var);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_get_scoped_var) {
- /* get_scoped_var dst(r) index(n) skip(n)
-
- Loads the contents of the index-th local from the scope skip nodes from
- the top of the scope chain, and places it in register dst.
- */
- int dst = vPC[1].u.operand;
- int index = vPC[2].u.operand;
- int skip = vPC[3].u.operand;
-
- ScopeChainNode* scopeChain = callFrame->scopeChain();
- ScopeChainIterator iter = scopeChain->begin();
- ScopeChainIterator end = scopeChain->end();
- ASSERT(iter != end);
- ASSERT(codeBlock == callFrame->codeBlock());
- bool checkTopLevel = codeBlock->codeType() == FunctionCode && codeBlock->needsFullScopeChain();
- ASSERT(skip || !checkTopLevel);
- if (checkTopLevel && skip--) {
- if (callFrame->r(codeBlock->activationRegister()).jsValue())
- ++iter;
- }
- while (skip--) {
- ++iter;
- ASSERT(iter != end);
- }
- ASSERT((*iter)->isVariableObject());
- JSVariableObject* scope = static_cast<JSVariableObject*>(iter->get());
- callFrame->uncheckedR(dst) = scope->registerAt(index).get();
- ASSERT(callFrame->r(dst).jsValue());
- vPC += OPCODE_LENGTH(op_get_scoped_var);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_put_scoped_var) {
- /* put_scoped_var index(n) skip(n) value(r)
-
- */
- int index = vPC[1].u.operand;
- int skip = vPC[2].u.operand;
- int value = vPC[3].u.operand;
-
- ScopeChainNode* scopeChain = callFrame->scopeChain();
- ScopeChainIterator iter = scopeChain->begin();
- ScopeChainIterator end = scopeChain->end();
- ASSERT(codeBlock == callFrame->codeBlock());
- ASSERT(iter != end);
- bool checkTopLevel = codeBlock->codeType() == FunctionCode && codeBlock->needsFullScopeChain();
- ASSERT(skip || !checkTopLevel);
- if (checkTopLevel && skip--) {
- if (callFrame->r(codeBlock->activationRegister()).jsValue())
- ++iter;
- }
- while (skip--) {
- ++iter;
- ASSERT(iter != end);
- }
-
- ASSERT((*iter)->isVariableObject());
- JSVariableObject* scope = static_cast<JSVariableObject*>(iter->get());
- ASSERT(callFrame->r(value).jsValue());
- scope->registerAt(index).set(*globalData, scope, callFrame->r(value).jsValue());
- vPC += OPCODE_LENGTH(op_put_scoped_var);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_resolve_base) {
- /* resolve_base dst(r) property(id) isStrict(bool)
-
- Searches the scope chain for an object containing
- identifier property, and if one is found, writes it to
- register dst. If none is found and isStrict is false, the
- outermost scope (which will be the global object) is
- stored in register dst.
- */
- resolveBase(callFrame, vPC);
- CHECK_FOR_EXCEPTION();
-
- vPC += OPCODE_LENGTH(op_resolve_base);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_ensure_property_exists) {
- /* ensure_property_exists base(r) property(id)
-
- Throws an exception if property does not exist on base
- */
- int base = vPC[1].u.operand;
- int property = vPC[2].u.operand;
- Identifier& ident = codeBlock->identifier(property);
-
- JSValue baseVal = callFrame->r(base).jsValue();
- JSObject* baseObject = asObject(baseVal);
- PropertySlot slot(baseVal);
- if (!baseObject->getPropertySlot(callFrame, ident, slot)) {
- exceptionValue = createErrorForInvalidGlobalAssignment(callFrame, ident.ustring());
- goto vm_throw;
- }
-
- vPC += OPCODE_LENGTH(op_ensure_property_exists);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_resolve_with_base) {
- /* resolve_with_base baseDst(r) propDst(r) property(id)
-
- Searches the scope chain for an object containing
- identifier property, and if one is found, writes it to
- register srcDst, and the retrieved property value to register
- propDst. If the property is not found, raises an exception.
-
- This is more efficient than doing resolve_base followed by
- resolve, or resolve_base followed by get_by_id, as it
- avoids duplicate hash lookups.
- */
- if (UNLIKELY(!resolveBaseAndProperty(callFrame, vPC, exceptionValue)))
- goto vm_throw;
-
- vPC += OPCODE_LENGTH(op_resolve_with_base);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_get_by_id) {
- /* get_by_id dst(r) base(r) property(id) structure(sID) nop(n) nop(n) nop(n)
-
- Generic property access: Gets the property named by identifier
- property from the value base, and puts the result in register dst.
- */
- int dst = vPC[1].u.operand;
- int base = vPC[2].u.operand;
- int property = vPC[3].u.operand;
-
- Identifier& ident = codeBlock->identifier(property);
- JSValue baseValue = callFrame->r(base).jsValue();
- PropertySlot slot(baseValue);
- JSValue result = baseValue.get(callFrame, ident, slot);
- CHECK_FOR_EXCEPTION();
-
- tryCacheGetByID(callFrame, codeBlock, vPC, baseValue, ident, slot);
-
- callFrame->uncheckedR(dst) = result;
- vPC += OPCODE_LENGTH(op_get_by_id);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_get_by_id_self) {
- /* op_get_by_id_self dst(r) base(r) property(id) structure(sID) offset(n) nop(n) nop(n)
-
- Cached property access: Attempts to get a cached property from the
- value base. If the cache misses, op_get_by_id_self reverts to
- op_get_by_id.
- */
- int base = vPC[2].u.operand;
- JSValue baseValue = callFrame->r(base).jsValue();
-
- if (LIKELY(baseValue.isCell())) {
- JSCell* baseCell = baseValue.asCell();
- Structure* structure = vPC[4].u.structure.get();
-
- if (LIKELY(baseCell->structure() == structure)) {
- ASSERT(baseCell->isObject());
- JSObject* baseObject = asObject(baseCell);
- int dst = vPC[1].u.operand;
- int offset = vPC[5].u.operand;
-
- ASSERT(baseObject->get(callFrame, codeBlock->identifier(vPC[3].u.operand)) == baseObject->getDirectOffset(offset));
- callFrame->uncheckedR(dst) = JSValue(baseObject->getDirectOffset(offset));
-
- vPC += OPCODE_LENGTH(op_get_by_id_self);
- NEXT_INSTRUCTION();
- }
- }
-
- uncacheGetByID(codeBlock, vPC);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_get_by_id_proto) {
- /* op_get_by_id_proto dst(r) base(r) property(id) structure(sID) prototypeStructure(sID) offset(n) nop(n)
-
- Cached property access: Attempts to get a cached property from the
- value base's prototype. If the cache misses, op_get_by_id_proto
- reverts to op_get_by_id.
- */
- int base = vPC[2].u.operand;
- JSValue baseValue = callFrame->r(base).jsValue();
-
- if (LIKELY(baseValue.isCell())) {
- JSCell* baseCell = baseValue.asCell();
- Structure* structure = vPC[4].u.structure.get();
-
- if (LIKELY(baseCell->structure() == structure)) {
- ASSERT(structure->prototypeForLookup(callFrame).isObject());
- JSObject* protoObject = asObject(structure->prototypeForLookup(callFrame));
- Structure* prototypeStructure = vPC[5].u.structure.get();
-
- if (LIKELY(protoObject->structure() == prototypeStructure)) {
- int dst = vPC[1].u.operand;
- int offset = vPC[6].u.operand;
-
- ASSERT(protoObject->get(callFrame, codeBlock->identifier(vPC[3].u.operand)) == protoObject->getDirectOffset(offset));
- ASSERT(baseValue.get(callFrame, codeBlock->identifier(vPC[3].u.operand)) == protoObject->getDirectOffset(offset));
- callFrame->uncheckedR(dst) = JSValue(protoObject->getDirectOffset(offset));
-
- vPC += OPCODE_LENGTH(op_get_by_id_proto);
- NEXT_INSTRUCTION();
- }
- }
- }
-
- uncacheGetByID(codeBlock, vPC);
- NEXT_INSTRUCTION();
- }
-#if USE(GCC_COMPUTED_GOTO_WORKAROUND)
- goto *(&&skip_id_getter_proto);
-#endif
- DEFINE_OPCODE(op_get_by_id_getter_proto) {
- /* op_get_by_id_getter_proto dst(r) base(r) property(id) structure(sID) prototypeStructure(sID) offset(n) nop(n)
-
- Cached property access: Attempts to get a cached getter property from the
- value base's prototype. If the cache misses, op_get_by_id_getter_proto
- reverts to op_get_by_id.
- */
- int base = vPC[2].u.operand;
- JSValue baseValue = callFrame->r(base).jsValue();
-
- if (LIKELY(baseValue.isCell())) {
- JSCell* baseCell = baseValue.asCell();
- Structure* structure = vPC[4].u.structure.get();
-
- if (LIKELY(baseCell->structure() == structure)) {
- ASSERT(structure->prototypeForLookup(callFrame).isObject());
- JSObject* protoObject = asObject(structure->prototypeForLookup(callFrame));
- Structure* prototypeStructure = vPC[5].u.structure.get();
-
- if (LIKELY(protoObject->structure() == prototypeStructure)) {
- int dst = vPC[1].u.operand;
- int offset = vPC[6].u.operand;
- if (GetterSetter* getterSetter = asGetterSetter(protoObject->getDirectOffset(offset).asCell())) {
- JSObject* getter = getterSetter->getter();
- CallData callData;
- CallType callType = getter->getCallData(callData);
- JSValue result = call(callFrame, getter, callType, callData, asObject(baseCell), ArgList());
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(dst) = result;
- } else
- callFrame->uncheckedR(dst) = jsUndefined();
- vPC += OPCODE_LENGTH(op_get_by_id_getter_proto);
- NEXT_INSTRUCTION();
- }
- }
- }
- uncacheGetByID(codeBlock, vPC);
- NEXT_INSTRUCTION();
- }
-#if USE(GCC_COMPUTED_GOTO_WORKAROUND)
- skip_id_getter_proto:
-#endif
-#if USE(GCC_COMPUTED_GOTO_WORKAROUND)
- goto *(&&skip_id_custom_proto);
-#endif
- DEFINE_OPCODE(op_get_by_id_custom_proto) {
- /* op_get_by_id_custom_proto dst(r) base(r) property(id) structure(sID) prototypeStructure(sID) offset(n) nop(n)
-
- Cached property access: Attempts to use a cached named property getter
- from the value base's prototype. If the cache misses, op_get_by_id_custom_proto
- reverts to op_get_by_id.
- */
- int base = vPC[2].u.operand;
- JSValue baseValue = callFrame->r(base).jsValue();
-
- if (LIKELY(baseValue.isCell())) {
- JSCell* baseCell = baseValue.asCell();
- Structure* structure = vPC[4].u.structure.get();
-
- if (LIKELY(baseCell->structure() == structure)) {
- ASSERT(structure->prototypeForLookup(callFrame).isObject());
- JSObject* protoObject = asObject(structure->prototypeForLookup(callFrame));
- Structure* prototypeStructure = vPC[5].u.structure.get();
-
- if (LIKELY(protoObject->structure() == prototypeStructure)) {
- int dst = vPC[1].u.operand;
- int property = vPC[3].u.operand;
- Identifier& ident = codeBlock->identifier(property);
-
- PropertySlot::GetValueFunc getter = vPC[6].u.getterFunc;
- JSValue result = getter(callFrame, protoObject, ident);
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(dst) = result;
- vPC += OPCODE_LENGTH(op_get_by_id_custom_proto);
- NEXT_INSTRUCTION();
- }
- }
- }
- uncacheGetByID(codeBlock, vPC);
- NEXT_INSTRUCTION();
- }
-#if USE(GCC_COMPUTED_GOTO_WORKAROUND)
- skip_id_custom_proto:
-#endif
- DEFINE_OPCODE(op_get_by_id_self_list) {
- // Polymorphic self access caching currently only supported when JITting.
- ASSERT_NOT_REACHED();
- // This case of the switch must not be empty, else (op_get_by_id_self_list == op_get_by_id_chain)!
- vPC += OPCODE_LENGTH(op_get_by_id_self_list);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_get_by_id_proto_list) {
- // Polymorphic prototype access caching currently only supported when JITting.
- ASSERT_NOT_REACHED();
- // This case of the switch must not be empty, else (op_get_by_id_proto_list == op_get_by_id_chain)!
- vPC += OPCODE_LENGTH(op_get_by_id_proto_list);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_get_by_id_getter_self_list) {
- // Polymorphic self access caching currently only supported when JITting.
- ASSERT_NOT_REACHED();
- // This case of the switch must not be empty, else (op_get_by_id_self_list == op_get_by_id_chain)!
- vPC += OPCODE_LENGTH(op_get_by_id_self_list);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_get_by_id_getter_proto_list) {
- // Polymorphic prototype access caching currently only supported when JITting.
- ASSERT_NOT_REACHED();
- // This case of the switch must not be empty, else (op_get_by_id_proto_list == op_get_by_id_chain)!
- vPC += OPCODE_LENGTH(op_get_by_id_proto_list);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_get_by_id_custom_self_list) {
- // Polymorphic self access caching currently only supported when JITting.
- ASSERT_NOT_REACHED();
- // This case of the switch must not be empty, else (op_get_by_id_self_list == op_get_by_id_chain)!
- vPC += OPCODE_LENGTH(op_get_by_id_custom_self_list);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_get_by_id_custom_proto_list) {
- // Polymorphic prototype access caching currently only supported when JITting.
- ASSERT_NOT_REACHED();
- // This case of the switch must not be empty, else (op_get_by_id_proto_list == op_get_by_id_chain)!
- vPC += OPCODE_LENGTH(op_get_by_id_proto_list);
- NEXT_INSTRUCTION();
- }
-#if USE(GCC_COMPUTED_GOTO_WORKAROUND)
- goto *(&&skip_get_by_id_chain);
-#endif
- DEFINE_OPCODE(op_get_by_id_chain) {
- /* op_get_by_id_chain dst(r) base(r) property(id) structure(sID) structureChain(chain) count(n) offset(n)
-
- Cached property access: Attempts to get a cached property from the
- value base's prototype chain. If the cache misses, op_get_by_id_chain
- reverts to op_get_by_id.
- */
- int base = vPC[2].u.operand;
- JSValue baseValue = callFrame->r(base).jsValue();
-
- if (LIKELY(baseValue.isCell())) {
- JSCell* baseCell = baseValue.asCell();
- Structure* structure = vPC[4].u.structure.get();
-
- if (LIKELY(baseCell->structure() == structure)) {
- WriteBarrier<Structure>* it = vPC[5].u.structureChain->head();
- size_t count = vPC[6].u.operand;
- WriteBarrier<Structure>* end = it + count;
-
- while (true) {
- JSObject* baseObject = asObject(baseCell->structure()->prototypeForLookup(callFrame));
-
- if (UNLIKELY(baseObject->structure() != (*it).get()))
- break;
-
- if (++it == end) {
- int dst = vPC[1].u.operand;
- int offset = vPC[7].u.operand;
-
- ASSERT(baseObject->get(callFrame, codeBlock->identifier(vPC[3].u.operand)) == baseObject->getDirectOffset(offset));
- ASSERT(baseValue.get(callFrame, codeBlock->identifier(vPC[3].u.operand)) == baseObject->getDirectOffset(offset));
- callFrame->uncheckedR(dst) = JSValue(baseObject->getDirectOffset(offset));
-
- vPC += OPCODE_LENGTH(op_get_by_id_chain);
- NEXT_INSTRUCTION();
- }
-
- // Update baseCell, so that next time around the loop we'll pick up the prototype's prototype.
- baseCell = baseObject;
- }
- }
- }
-
- uncacheGetByID(codeBlock, vPC);
- NEXT_INSTRUCTION();
- }
-#if USE(GCC_COMPUTED_GOTO_WORKAROUND)
- skip_get_by_id_chain:
- goto *(&&skip_id_getter_self);
-#endif
- DEFINE_OPCODE(op_get_by_id_getter_self) {
- /* op_get_by_id_self dst(r) base(r) property(id) structure(sID) offset(n) nop(n) nop(n)
-
- Cached property access: Attempts to get a cached property from the
- value base. If the cache misses, op_get_by_id_getter_self reverts to
- op_get_by_id.
- */
- int base = vPC[2].u.operand;
- JSValue baseValue = callFrame->r(base).jsValue();
-
- if (LIKELY(baseValue.isCell())) {
- JSCell* baseCell = baseValue.asCell();
- Structure* structure = vPC[4].u.structure.get();
-
- if (LIKELY(baseCell->structure() == structure)) {
- ASSERT(baseCell->isObject());
- JSObject* baseObject = asObject(baseCell);
- int dst = vPC[1].u.operand;
- int offset = vPC[5].u.operand;
-
- if (GetterSetter* getterSetter = asGetterSetter(baseObject->getDirectOffset(offset).asCell())) {
- JSObject* getter = getterSetter->getter();
- CallData callData;
- CallType callType = getter->getCallData(callData);
- JSValue result = call(callFrame, getter, callType, callData, baseObject, ArgList());
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(dst) = result;
- } else
- callFrame->uncheckedR(dst) = jsUndefined();
-
- vPC += OPCODE_LENGTH(op_get_by_id_getter_self);
- NEXT_INSTRUCTION();
- }
- }
- uncacheGetByID(codeBlock, vPC);
- NEXT_INSTRUCTION();
- }
-#if USE(GCC_COMPUTED_GOTO_WORKAROUND)
- skip_id_getter_self:
-#endif
-#if USE(GCC_COMPUTED_GOTO_WORKAROUND)
- goto *(&&skip_id_custom_self);
-#endif
- DEFINE_OPCODE(op_get_by_id_custom_self) {
- /* op_get_by_id_custom_self dst(r) base(r) property(id) structure(sID) offset(n) nop(n) nop(n)
-
- Cached property access: Attempts to use a cached named property getter
- from the value base. If the cache misses, op_get_by_id_custom_self reverts to
- op_get_by_id.
- */
- int base = vPC[2].u.operand;
- JSValue baseValue = callFrame->r(base).jsValue();
-
- if (LIKELY(baseValue.isCell())) {
- JSCell* baseCell = baseValue.asCell();
- Structure* structure = vPC[4].u.structure.get();
-
- if (LIKELY(baseCell->structure() == structure)) {
- ASSERT(baseCell->isObject());
- int dst = vPC[1].u.operand;
- int property = vPC[3].u.operand;
- Identifier& ident = codeBlock->identifier(property);
-
- PropertySlot::GetValueFunc getter = vPC[5].u.getterFunc;
- JSValue result = getter(callFrame, baseValue, ident);
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(dst) = result;
- vPC += OPCODE_LENGTH(op_get_by_id_custom_self);
- NEXT_INSTRUCTION();
- }
- }
- uncacheGetByID(codeBlock, vPC);
- NEXT_INSTRUCTION();
- }
-#if USE(GCC_COMPUTED_GOTO_WORKAROUND)
-skip_id_custom_self:
-#endif
- DEFINE_OPCODE(op_get_by_id_generic) {
- /* op_get_by_id_generic dst(r) base(r) property(id) nop(sID) nop(n) nop(n) nop(n)
-
- Generic property access: Gets the property named by identifier
- property from the value base, and puts the result in register dst.
- */
- int dst = vPC[1].u.operand;
- int base = vPC[2].u.operand;
- int property = vPC[3].u.operand;
-
- Identifier& ident = codeBlock->identifier(property);
- JSValue baseValue = callFrame->r(base).jsValue();
- PropertySlot slot(baseValue);
- JSValue result = baseValue.get(callFrame, ident, slot);
- CHECK_FOR_EXCEPTION();
-
- callFrame->uncheckedR(dst) = result;
- vPC += OPCODE_LENGTH(op_get_by_id_generic);
- NEXT_INSTRUCTION();
- }
-#if USE(GCC_COMPUTED_GOTO_WORKAROUND)
- goto *(&&skip_id_getter_chain);
-#endif
- DEFINE_OPCODE(op_get_by_id_getter_chain) {
- /* op_get_by_id_getter_chain dst(r) base(r) property(id) structure(sID) structureChain(chain) count(n) offset(n)
-
- Cached property access: Attempts to get a cached property from the
- value base's prototype chain. If the cache misses, op_get_by_id_getter_chain
- reverts to op_get_by_id.
- */
- int base = vPC[2].u.operand;
- JSValue baseValue = callFrame->r(base).jsValue();
-
- if (LIKELY(baseValue.isCell())) {
- JSCell* baseCell = baseValue.asCell();
- Structure* structure = vPC[4].u.structure.get();
-
- if (LIKELY(baseCell->structure() == structure)) {
- WriteBarrier<Structure>* it = vPC[5].u.structureChain->head();
- size_t count = vPC[6].u.operand;
- WriteBarrier<Structure>* end = it + count;
-
- while (true) {
- JSObject* baseObject = asObject(baseCell->structure()->prototypeForLookup(callFrame));
-
- if (UNLIKELY(baseObject->structure() != (*it).get()))
- break;
-
- if (++it == end) {
- int dst = vPC[1].u.operand;
- int offset = vPC[7].u.operand;
- if (GetterSetter* getterSetter = asGetterSetter(baseObject->getDirectOffset(offset).asCell())) {
- JSObject* getter = getterSetter->getter();
- CallData callData;
- CallType callType = getter->getCallData(callData);
- JSValue result = call(callFrame, getter, callType, callData, baseValue, ArgList());
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(dst) = result;
- } else
- callFrame->uncheckedR(dst) = jsUndefined();
- vPC += OPCODE_LENGTH(op_get_by_id_getter_chain);
- NEXT_INSTRUCTION();
- }
-
- // Update baseCell, so that next time around the loop we'll pick up the prototype's prototype.
- baseCell = baseObject;
- }
- }
- }
- uncacheGetByID(codeBlock, vPC);
- NEXT_INSTRUCTION();
- }
-#if USE(GCC_COMPUTED_GOTO_WORKAROUND)
- skip_id_getter_chain:
-#endif
-#if USE(GCC_COMPUTED_GOTO_WORKAROUND)
- goto *(&&skip_id_custom_chain);
-#endif
- DEFINE_OPCODE(op_get_by_id_custom_chain) {
- /* op_get_by_id_custom_chain dst(r) base(r) property(id) structure(sID) structureChain(chain) count(n) offset(n)
-
- Cached property access: Attempts to use a cached named property getter on the
- value base's prototype chain. If the cache misses, op_get_by_id_custom_chain
- reverts to op_get_by_id.
- */
- int base = vPC[2].u.operand;
- JSValue baseValue = callFrame->r(base).jsValue();
-
- if (LIKELY(baseValue.isCell())) {
- JSCell* baseCell = baseValue.asCell();
- Structure* structure = vPC[4].u.structure.get();
-
- if (LIKELY(baseCell->structure() == structure)) {
- WriteBarrier<Structure>* it = vPC[5].u.structureChain->head();
- size_t count = vPC[6].u.operand;
- WriteBarrier<Structure>* end = it + count;
-
- while (true) {
- JSObject* baseObject = asObject(baseCell->structure()->prototypeForLookup(callFrame));
-
- if (UNLIKELY(baseObject->structure() != (*it).get()))
- break;
-
- if (++it == end) {
- int dst = vPC[1].u.operand;
- int property = vPC[3].u.operand;
- Identifier& ident = codeBlock->identifier(property);
-
- PropertySlot::GetValueFunc getter = vPC[7].u.getterFunc;
- JSValue result = getter(callFrame, baseObject, ident);
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(dst) = result;
- vPC += OPCODE_LENGTH(op_get_by_id_custom_chain);
- NEXT_INSTRUCTION();
- }
-
- // Update baseCell, so that next time around the loop we'll pick up the prototype's prototype.
- baseCell = baseObject;
- }
- }
- }
- uncacheGetByID(codeBlock, vPC);
- NEXT_INSTRUCTION();
- }
-#if USE(GCC_COMPUTED_GOTO_WORKAROUND)
- skip_id_custom_chain:
- goto *(&&skip_get_array_length);
-#endif
- DEFINE_OPCODE(op_get_array_length) {
- /* op_get_array_length dst(r) base(r) property(id) nop(sID) nop(n) nop(n) nop(n)
-
- Cached property access: Gets the length of the array in register base,
- and puts the result in register dst. If register base does not hold
- an array, op_get_array_length reverts to op_get_by_id.
- */
-
- int base = vPC[2].u.operand;
- JSValue baseValue = callFrame->r(base).jsValue();
- if (LIKELY(isJSArray(globalData, baseValue))) {
- int dst = vPC[1].u.operand;
- callFrame->uncheckedR(dst) = jsNumber(asArray(baseValue)->length());
- vPC += OPCODE_LENGTH(op_get_array_length);
- NEXT_INSTRUCTION();
- }
-
- uncacheGetByID(codeBlock, vPC);
- NEXT_INSTRUCTION();
- }
-#if USE(GCC_COMPUTED_GOTO_WORKAROUND)
- skip_get_array_length:
- goto *(&&skip_get_string_length);
-#endif
- DEFINE_OPCODE(op_get_string_length) {
- /* op_get_string_length dst(r) base(r) property(id) nop(sID) nop(n) nop(n) nop(n)
-
- Cached property access: Gets the length of the string in register base,
- and puts the result in register dst. If register base does not hold
- a string, op_get_string_length reverts to op_get_by_id.
- */
-
- int base = vPC[2].u.operand;
- JSValue baseValue = callFrame->r(base).jsValue();
- if (LIKELY(isJSString(globalData, baseValue))) {
- int dst = vPC[1].u.operand;
- callFrame->uncheckedR(dst) = jsNumber(asString(baseValue)->length());
- vPC += OPCODE_LENGTH(op_get_string_length);
- NEXT_INSTRUCTION();
- }
-
- uncacheGetByID(codeBlock, vPC);
- NEXT_INSTRUCTION();
- }
-#if USE(GCC_COMPUTED_GOTO_WORKAROUND)
- skip_get_string_length:
- goto *(&&skip_put_by_id);
-#endif
- DEFINE_OPCODE(op_put_by_id) {
- /* put_by_id base(r) property(id) value(r) nop(n) nop(n) nop(n) nop(n) direct(b)
-
- Generic property access: Sets the property named by identifier
- property, belonging to register base, to register value.
-
- Unlike many opcodes, this one does not write any output to
- the register file.
-
- The "direct" flag should only be set this put_by_id is to initialize
- an object literal.
- */
-
- int base = vPC[1].u.operand;
- int property = vPC[2].u.operand;
- int value = vPC[3].u.operand;
- int direct = vPC[8].u.operand;
-
- JSValue baseValue = callFrame->r(base).jsValue();
- Identifier& ident = codeBlock->identifier(property);
- PutPropertySlot slot(codeBlock->isStrictMode());
- if (direct) {
- baseValue.putDirect(callFrame, ident, callFrame->r(value).jsValue(), slot);
- ASSERT(slot.base() == baseValue);
- } else
- baseValue.put(callFrame, ident, callFrame->r(value).jsValue(), slot);
- CHECK_FOR_EXCEPTION();
-
- tryCachePutByID(callFrame, codeBlock, vPC, baseValue, slot);
-
- vPC += OPCODE_LENGTH(op_put_by_id);
- NEXT_INSTRUCTION();
- }
-#if USE(GCC_COMPUTED_GOTO_WORKAROUND)
- skip_put_by_id:
-#endif
- DEFINE_OPCODE(op_put_by_id_transition) {
- /* op_put_by_id_transition base(r) property(id) value(r) oldStructure(sID) newStructure(sID) structureChain(chain) offset(n) direct(b)
-
- Cached property access: Attempts to set a new property with a cached transition
- property named by identifier property, belonging to register base,
- to register value. If the cache misses, op_put_by_id_transition
- reverts to op_put_by_id_generic.
-
- Unlike many opcodes, this one does not write any output to
- the register file.
- */
- int base = vPC[1].u.operand;
- JSValue baseValue = callFrame->r(base).jsValue();
-
- if (LIKELY(baseValue.isCell())) {
- JSCell* baseCell = baseValue.asCell();
- Structure* oldStructure = vPC[4].u.structure.get();
- Structure* newStructure = vPC[5].u.structure.get();
-
- if (LIKELY(baseCell->structure() == oldStructure)) {
- ASSERT(baseCell->isObject());
- JSObject* baseObject = asObject(baseCell);
- int direct = vPC[8].u.operand;
-
- if (!direct) {
- WriteBarrier<Structure>* it = vPC[6].u.structureChain->head();
-
- JSValue proto = baseObject->structure()->prototypeForLookup(callFrame);
- while (!proto.isNull()) {
- if (UNLIKELY(asObject(proto)->structure() != (*it).get())) {
- uncachePutByID(codeBlock, vPC);
- NEXT_INSTRUCTION();
- }
- ++it;
- proto = asObject(proto)->structure()->prototypeForLookup(callFrame);
- }
- }
- baseObject->transitionTo(*globalData, newStructure);
-
- int value = vPC[3].u.operand;
- unsigned offset = vPC[7].u.operand;
- ASSERT(baseObject->offsetForLocation(baseObject->getDirectLocation(*globalData, codeBlock->identifier(vPC[2].u.operand))) == offset);
- baseObject->putDirectOffset(callFrame->globalData(), offset, callFrame->r(value).jsValue());
-
- vPC += OPCODE_LENGTH(op_put_by_id_transition);
- NEXT_INSTRUCTION();
- }
- }
-
- uncachePutByID(codeBlock, vPC);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_put_by_id_replace) {
- /* op_put_by_id_replace base(r) property(id) value(r) structure(sID) offset(n) nop(n) nop(n) direct(b)
-
- Cached property access: Attempts to set a pre-existing, cached
- property named by identifier property, belonging to register base,
- to register value. If the cache misses, op_put_by_id_replace
- reverts to op_put_by_id.
-
- Unlike many opcodes, this one does not write any output to
- the register file.
- */
- int base = vPC[1].u.operand;
- JSValue baseValue = callFrame->r(base).jsValue();
-
- if (LIKELY(baseValue.isCell())) {
- JSCell* baseCell = baseValue.asCell();
- Structure* structure = vPC[4].u.structure.get();
-
- if (LIKELY(baseCell->structure() == structure)) {
- ASSERT(baseCell->isObject());
- JSObject* baseObject = asObject(baseCell);
- int value = vPC[3].u.operand;
- unsigned offset = vPC[5].u.operand;
-
- ASSERT(baseObject->offsetForLocation(baseObject->getDirectLocation(*globalData, codeBlock->identifier(vPC[2].u.operand))) == offset);
- baseObject->putDirectOffset(callFrame->globalData(), offset, callFrame->r(value).jsValue());
-
- vPC += OPCODE_LENGTH(op_put_by_id_replace);
- NEXT_INSTRUCTION();
- }
- }
-
- uncachePutByID(codeBlock, vPC);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_put_by_id_generic) {
- /* op_put_by_id_generic base(r) property(id) value(r) nop(n) nop(n) nop(n) nop(n) direct(b)
-
- Generic property access: Sets the property named by identifier
- property, belonging to register base, to register value.
-
- Unlike many opcodes, this one does not write any output to
- the register file.
- */
- int base = vPC[1].u.operand;
- int property = vPC[2].u.operand;
- int value = vPC[3].u.operand;
- int direct = vPC[8].u.operand;
-
- JSValue baseValue = callFrame->r(base).jsValue();
- Identifier& ident = codeBlock->identifier(property);
- PutPropertySlot slot(codeBlock->isStrictMode());
- if (direct) {
- baseValue.putDirect(callFrame, ident, callFrame->r(value).jsValue(), slot);
- ASSERT(slot.base() == baseValue);
- } else
- baseValue.put(callFrame, ident, callFrame->r(value).jsValue(), slot);
- CHECK_FOR_EXCEPTION();
-
- vPC += OPCODE_LENGTH(op_put_by_id_generic);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_del_by_id) {
- /* del_by_id dst(r) base(r) property(id)
-
- Converts register base to Object, deletes the property
- named by identifier property from the object, and writes a
- boolean indicating success (if true) or failure (if false)
- to register dst.
- */
- int dst = vPC[1].u.operand;
- int base = vPC[2].u.operand;
- int property = vPC[3].u.operand;
-
- JSObject* baseObj = callFrame->r(base).jsValue().toObject(callFrame);
- Identifier& ident = codeBlock->identifier(property);
- bool result = baseObj->deleteProperty(callFrame, ident);
- if (!result && codeBlock->isStrictMode()) {
- exceptionValue = createTypeError(callFrame, "Unable to delete property.");
- goto vm_throw;
- }
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(dst) = jsBoolean(result);
- vPC += OPCODE_LENGTH(op_del_by_id);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_get_by_pname) {
- int dst = vPC[1].u.operand;
- int base = vPC[2].u.operand;
- int property = vPC[3].u.operand;
- int expected = vPC[4].u.operand;
- int iter = vPC[5].u.operand;
- int i = vPC[6].u.operand;
-
- JSValue baseValue = callFrame->r(base).jsValue();
- JSPropertyNameIterator* it = callFrame->r(iter).propertyNameIterator();
- JSValue subscript = callFrame->r(property).jsValue();
- JSValue expectedSubscript = callFrame->r(expected).jsValue();
- int index = callFrame->r(i).i() - 1;
- JSValue result;
- int offset = 0;
- if (subscript == expectedSubscript && baseValue.isCell() && (baseValue.asCell()->structure() == it->cachedStructure()) && it->getOffset(index, offset)) {
- callFrame->uncheckedR(dst) = JSValue(asObject(baseValue)->getDirectOffset(offset));
- vPC += OPCODE_LENGTH(op_get_by_pname);
- NEXT_INSTRUCTION();
- }
- {
- Identifier propertyName(callFrame, subscript.toString(callFrame));
- result = baseValue.get(callFrame, propertyName);
- }
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(dst) = result;
- vPC += OPCODE_LENGTH(op_get_by_pname);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_get_arguments_length) {
- int dst = vPC[1].u.operand;
- int argumentsRegister = vPC[2].u.operand;
- int property = vPC[3].u.operand;
- JSValue arguments = callFrame->r(argumentsRegister).jsValue();
- if (arguments) {
- Identifier& ident = codeBlock->identifier(property);
- PropertySlot slot(arguments);
- JSValue result = arguments.get(callFrame, ident, slot);
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(dst) = result;
- } else
- callFrame->uncheckedR(dst) = jsNumber(callFrame->argumentCount());
-
- vPC += OPCODE_LENGTH(op_get_arguments_length);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_get_argument_by_val) {
- int dst = vPC[1].u.operand;
- int argumentsRegister = vPC[2].u.operand;
- int property = vPC[3].u.operand;
- JSValue arguments = callFrame->r(argumentsRegister).jsValue();
- JSValue subscript = callFrame->r(property).jsValue();
- if (!arguments && subscript.isUInt32() && subscript.asUInt32() < callFrame->argumentCount()) {
- unsigned arg = subscript.asUInt32() + 1;
- unsigned numParameters = callFrame->codeBlock()->m_numParameters;
- if (arg < numParameters)
- callFrame->uncheckedR(dst) = callFrame->r(arg - RegisterFile::CallFrameHeaderSize - numParameters);
- else
- callFrame->uncheckedR(dst) = callFrame->r(arg - RegisterFile::CallFrameHeaderSize - numParameters - callFrame->argumentCount() - 1);
- vPC += OPCODE_LENGTH(op_get_argument_by_val);
- NEXT_INSTRUCTION();
- }
- if (!arguments) {
- Arguments* arguments = new (globalData) Arguments(callFrame);
- callFrame->uncheckedR(argumentsRegister) = JSValue(arguments);
- callFrame->uncheckedR(unmodifiedArgumentsRegister(argumentsRegister)) = JSValue(arguments);
- }
- // fallthrough
- }
- DEFINE_OPCODE(op_get_by_val) {
- /* get_by_val dst(r) base(r) property(r)
-
- Converts register base to Object, gets the property named
- by register property from the object, and puts the result
- in register dst. property is nominally converted to string
- but numbers are treated more efficiently.
- */
- int dst = vPC[1].u.operand;
- int base = vPC[2].u.operand;
- int property = vPC[3].u.operand;
-
- JSValue baseValue = callFrame->r(base).jsValue();
- JSValue subscript = callFrame->r(property).jsValue();
-
- JSValue result;
-
- if (LIKELY(subscript.isUInt32())) {
- uint32_t i = subscript.asUInt32();
- if (isJSArray(globalData, baseValue)) {
- JSArray* jsArray = asArray(baseValue);
- if (jsArray->canGetIndex(i))
- result = jsArray->getIndex(i);
- else
- result = jsArray->JSArray::get(callFrame, i);
- } else if (isJSString(globalData, baseValue) && asString(baseValue)->canGetIndex(i))
- result = asString(baseValue)->getIndex(callFrame, i);
- else if (isJSByteArray(globalData, baseValue) && asByteArray(baseValue)->canAccessIndex(i))
- result = asByteArray(baseValue)->getIndex(callFrame, i);
- else
- result = baseValue.get(callFrame, i);
- } else {
- Identifier property(callFrame, subscript.toString(callFrame));
- result = baseValue.get(callFrame, property);
- }
-
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(dst) = result;
- vPC += OPCODE_LENGTH(op_get_by_val);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_put_by_val) {
- /* put_by_val base(r) property(r) value(r)
-
- Sets register value on register base as the property named
- by register property. Base is converted to object
- first. register property is nominally converted to string
- but numbers are treated more efficiently.
-
- Unlike many opcodes, this one does not write any output to
- the register file.
- */
- int base = vPC[1].u.operand;
- int property = vPC[2].u.operand;
- int value = vPC[3].u.operand;
-
- JSValue baseValue = callFrame->r(base).jsValue();
- JSValue subscript = callFrame->r(property).jsValue();
-
- if (LIKELY(subscript.isUInt32())) {
- uint32_t i = subscript.asUInt32();
- if (isJSArray(globalData, baseValue)) {
- JSArray* jsArray = asArray(baseValue);
- if (jsArray->canSetIndex(i))
- jsArray->setIndex(*globalData, i, callFrame->r(value).jsValue());
- else
- jsArray->JSArray::put(callFrame, i, callFrame->r(value).jsValue());
- } else if (isJSByteArray(globalData, baseValue) && asByteArray(baseValue)->canAccessIndex(i)) {
- JSByteArray* jsByteArray = asByteArray(baseValue);
- double dValue = 0;
- JSValue jsValue = callFrame->r(value).jsValue();
- if (jsValue.isInt32())
- jsByteArray->setIndex(i, jsValue.asInt32());
- else if (jsValue.getNumber(dValue))
- jsByteArray->setIndex(i, dValue);
- else
- baseValue.put(callFrame, i, jsValue);
- } else
- baseValue.put(callFrame, i, callFrame->r(value).jsValue());
- } else {
- Identifier property(callFrame, subscript.toString(callFrame));
- if (!globalData->exception) { // Don't put to an object if toString threw an exception.
- PutPropertySlot slot(codeBlock->isStrictMode());
- baseValue.put(callFrame, property, callFrame->r(value).jsValue(), slot);
- }
- }
-
- CHECK_FOR_EXCEPTION();
- vPC += OPCODE_LENGTH(op_put_by_val);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_del_by_val) {
- /* del_by_val dst(r) base(r) property(r)
-
- Converts register base to Object, deletes the property
- named by register property from the object, and writes a
- boolean indicating success (if true) or failure (if false)
- to register dst.
- */
- int dst = vPC[1].u.operand;
- int base = vPC[2].u.operand;
- int property = vPC[3].u.operand;
-
- JSObject* baseObj = callFrame->r(base).jsValue().toObject(callFrame); // may throw
-
- JSValue subscript = callFrame->r(property).jsValue();
- bool result;
- uint32_t i;
- if (subscript.getUInt32(i))
- result = baseObj->deleteProperty(callFrame, i);
- else {
- CHECK_FOR_EXCEPTION();
- Identifier property(callFrame, subscript.toString(callFrame));
- CHECK_FOR_EXCEPTION();
- result = baseObj->deleteProperty(callFrame, property);
- }
- if (!result && codeBlock->isStrictMode()) {
- exceptionValue = createTypeError(callFrame, "Unable to delete property.");
- goto vm_throw;
- }
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(dst) = jsBoolean(result);
- vPC += OPCODE_LENGTH(op_del_by_val);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_put_by_index) {
- /* put_by_index base(r) property(n) value(r)
-
- Sets register value on register base as the property named
- by the immediate number property. Base is converted to
- object first.
-
- Unlike many opcodes, this one does not write any output to
- the register file.
-
- This opcode is mainly used to initialize array literals.
- */
- int base = vPC[1].u.operand;
- unsigned property = vPC[2].u.operand;
- int value = vPC[3].u.operand;
-
- callFrame->r(base).jsValue().put(callFrame, property, callFrame->r(value).jsValue());
-
- vPC += OPCODE_LENGTH(op_put_by_index);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_loop) {
- /* loop target(offset)
-
- Jumps unconditionally to offset target from the current
- instruction.
-
- Additionally this loop instruction may terminate JS execution is
- the JS timeout is reached.
- */
-#if ENABLE(OPCODE_STATS)
- OpcodeStats::resetLastInstruction();
-#endif
- int target = vPC[1].u.operand;
- CHECK_FOR_TIMEOUT();
- vPC += target;
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_jmp) {
- /* jmp target(offset)
-
- Jumps unconditionally to offset target from the current
- instruction.
- */
-#if ENABLE(OPCODE_STATS)
- OpcodeStats::resetLastInstruction();
-#endif
- int target = vPC[1].u.operand;
-
- vPC += target;
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_loop_if_true) {
- /* loop_if_true cond(r) target(offset)
-
- Jumps to offset target from the current instruction, if and
- only if register cond converts to boolean as true.
-
- Additionally this loop instruction may terminate JS execution is
- the JS timeout is reached.
- */
- int cond = vPC[1].u.operand;
- int target = vPC[2].u.operand;
- if (callFrame->r(cond).jsValue().toBoolean(callFrame)) {
- vPC += target;
- CHECK_FOR_TIMEOUT();
- NEXT_INSTRUCTION();
- }
-
- vPC += OPCODE_LENGTH(op_loop_if_true);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_loop_if_false) {
- /* loop_if_true cond(r) target(offset)
-
- Jumps to offset target from the current instruction, if and
- only if register cond converts to boolean as false.
-
- Additionally this loop instruction may terminate JS execution is
- the JS timeout is reached.
- */
- int cond = vPC[1].u.operand;
- int target = vPC[2].u.operand;
- if (!callFrame->r(cond).jsValue().toBoolean(callFrame)) {
- vPC += target;
- CHECK_FOR_TIMEOUT();
- NEXT_INSTRUCTION();
- }
-
- vPC += OPCODE_LENGTH(op_loop_if_true);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_jtrue) {
- /* jtrue cond(r) target(offset)
-
- Jumps to offset target from the current instruction, if and
- only if register cond converts to boolean as true.
- */
- int cond = vPC[1].u.operand;
- int target = vPC[2].u.operand;
- if (callFrame->r(cond).jsValue().toBoolean(callFrame)) {
- vPC += target;
- NEXT_INSTRUCTION();
- }
-
- vPC += OPCODE_LENGTH(op_jtrue);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_jfalse) {
- /* jfalse cond(r) target(offset)
-
- Jumps to offset target from the current instruction, if and
- only if register cond converts to boolean as false.
- */
- int cond = vPC[1].u.operand;
- int target = vPC[2].u.operand;
- if (!callFrame->r(cond).jsValue().toBoolean(callFrame)) {
- vPC += target;
- NEXT_INSTRUCTION();
- }
-
- vPC += OPCODE_LENGTH(op_jfalse);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_jeq_null) {
- /* jeq_null src(r) target(offset)
-
- Jumps to offset target from the current instruction, if and
- only if register src is null.
- */
- int src = vPC[1].u.operand;
- int target = vPC[2].u.operand;
- JSValue srcValue = callFrame->r(src).jsValue();
-
- if (srcValue.isUndefinedOrNull() || (srcValue.isCell() && srcValue.asCell()->structure()->typeInfo().masqueradesAsUndefined())) {
- vPC += target;
- NEXT_INSTRUCTION();
- }
-
- vPC += OPCODE_LENGTH(op_jeq_null);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_jneq_null) {
- /* jneq_null src(r) target(offset)
-
- Jumps to offset target from the current instruction, if and
- only if register src is not null.
- */
- int src = vPC[1].u.operand;
- int target = vPC[2].u.operand;
- JSValue srcValue = callFrame->r(src).jsValue();
-
- if (!srcValue.isUndefinedOrNull() && (!srcValue.isCell() || !srcValue.asCell()->structure()->typeInfo().masqueradesAsUndefined())) {
- vPC += target;
- NEXT_INSTRUCTION();
- }
-
- vPC += OPCODE_LENGTH(op_jneq_null);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_jneq_ptr) {
- /* jneq_ptr src(r) ptr(jsCell) target(offset)
-
- Jumps to offset target from the current instruction, if the value r is equal
- to ptr, using pointer equality.
- */
- int src = vPC[1].u.operand;
- int target = vPC[3].u.operand;
- JSValue srcValue = callFrame->r(src).jsValue();
- if (srcValue != vPC[2].u.jsCell.get()) {
- vPC += target;
- NEXT_INSTRUCTION();
- }
-
- vPC += OPCODE_LENGTH(op_jneq_ptr);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_loop_if_less) {
- /* loop_if_less src1(r) src2(r) target(offset)
-
- Checks whether register src1 is less than register src2, as
- with the ECMAScript '<' operator, and then jumps to offset
- target from the current instruction, if and only if the
- result of the comparison is true.
-
- Additionally this loop instruction may terminate JS execution is
- the JS timeout is reached.
- */
- JSValue src1 = callFrame->r(vPC[1].u.operand).jsValue();
- JSValue src2 = callFrame->r(vPC[2].u.operand).jsValue();
- int target = vPC[3].u.operand;
-
- bool result = jsLess(callFrame, src1, src2);
- CHECK_FOR_EXCEPTION();
-
- if (result) {
- vPC += target;
- CHECK_FOR_TIMEOUT();
- NEXT_INSTRUCTION();
- }
-
- vPC += OPCODE_LENGTH(op_loop_if_less);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_loop_if_lesseq) {
- /* loop_if_lesseq src1(r) src2(r) target(offset)
-
- Checks whether register src1 is less than or equal to register
- src2, as with the ECMAScript '<=' operator, and then jumps to
- offset target from the current instruction, if and only if the
- result of the comparison is true.
-
- Additionally this loop instruction may terminate JS execution is
- the JS timeout is reached.
- */
- JSValue src1 = callFrame->r(vPC[1].u.operand).jsValue();
- JSValue src2 = callFrame->r(vPC[2].u.operand).jsValue();
- int target = vPC[3].u.operand;
-
- bool result = jsLessEq(callFrame, src1, src2);
- CHECK_FOR_EXCEPTION();
-
- if (result) {
- vPC += target;
- CHECK_FOR_TIMEOUT();
- NEXT_INSTRUCTION();
- }
-
- vPC += OPCODE_LENGTH(op_loop_if_lesseq);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_jnless) {
- /* jnless src1(r) src2(r) target(offset)
-
- Checks whether register src1 is less than register src2, as
- with the ECMAScript '<' operator, and then jumps to offset
- target from the current instruction, if and only if the
- result of the comparison is false.
- */
- JSValue src1 = callFrame->r(vPC[1].u.operand).jsValue();
- JSValue src2 = callFrame->r(vPC[2].u.operand).jsValue();
- int target = vPC[3].u.operand;
-
- bool result = jsLess(callFrame, src1, src2);
- CHECK_FOR_EXCEPTION();
-
- if (!result) {
- vPC += target;
- NEXT_INSTRUCTION();
- }
-
- vPC += OPCODE_LENGTH(op_jnless);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_jless) {
- /* jless src1(r) src2(r) target(offset)
-
- Checks whether register src1 is less than register src2, as
- with the ECMAScript '<' operator, and then jumps to offset
- target from the current instruction, if and only if the
- result of the comparison is true.
- */
- JSValue src1 = callFrame->r(vPC[1].u.operand).jsValue();
- JSValue src2 = callFrame->r(vPC[2].u.operand).jsValue();
- int target = vPC[3].u.operand;
-
- bool result = jsLess(callFrame, src1, src2);
- CHECK_FOR_EXCEPTION();
-
- if (result) {
- vPC += target;
- NEXT_INSTRUCTION();
- }
-
- vPC += OPCODE_LENGTH(op_jless);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_jnlesseq) {
- /* jnlesseq src1(r) src2(r) target(offset)
-
- Checks whether register src1 is less than or equal to
- register src2, as with the ECMAScript '<=' operator,
- and then jumps to offset target from the current instruction,
- if and only if theresult of the comparison is false.
- */
- JSValue src1 = callFrame->r(vPC[1].u.operand).jsValue();
- JSValue src2 = callFrame->r(vPC[2].u.operand).jsValue();
- int target = vPC[3].u.operand;
-
- bool result = jsLessEq(callFrame, src1, src2);
- CHECK_FOR_EXCEPTION();
-
- if (!result) {
- vPC += target;
- NEXT_INSTRUCTION();
- }
-
- vPC += OPCODE_LENGTH(op_jnlesseq);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_jlesseq) {
- /* jlesseq src1(r) src2(r) target(offset)
-
- Checks whether register src1 is less than or equal to
- register src2, as with the ECMAScript '<=' operator,
- and then jumps to offset target from the current instruction,
- if and only if the result of the comparison is true.
- */
- JSValue src1 = callFrame->r(vPC[1].u.operand).jsValue();
- JSValue src2 = callFrame->r(vPC[2].u.operand).jsValue();
- int target = vPC[3].u.operand;
-
- bool result = jsLessEq(callFrame, src1, src2);
- CHECK_FOR_EXCEPTION();
-
- if (result) {
- vPC += target;
- NEXT_INSTRUCTION();
- }
-
- vPC += OPCODE_LENGTH(op_jlesseq);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_switch_imm) {
- /* switch_imm tableIndex(n) defaultOffset(offset) scrutinee(r)
-
- Performs a range checked switch on the scrutinee value, using
- the tableIndex-th immediate switch jump table. If the scrutinee value
- is an immediate number in the range covered by the referenced jump
- table, and the value at jumpTable[scrutinee value] is non-zero, then
- that value is used as the jump offset, otherwise defaultOffset is used.
- */
- int tableIndex = vPC[1].u.operand;
- int defaultOffset = vPC[2].u.operand;
- JSValue scrutinee = callFrame->r(vPC[3].u.operand).jsValue();
- if (scrutinee.isInt32())
- vPC += codeBlock->immediateSwitchJumpTable(tableIndex).offsetForValue(scrutinee.asInt32(), defaultOffset);
- else {
- double value;
- int32_t intValue;
- if (scrutinee.getNumber(value) && ((intValue = static_cast<int32_t>(value)) == value))
- vPC += codeBlock->immediateSwitchJumpTable(tableIndex).offsetForValue(intValue, defaultOffset);
- else
- vPC += defaultOffset;
- }
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_switch_char) {
- /* switch_char tableIndex(n) defaultOffset(offset) scrutinee(r)
-
- Performs a range checked switch on the scrutinee value, using
- the tableIndex-th character switch jump table. If the scrutinee value
- is a single character string in the range covered by the referenced jump
- table, and the value at jumpTable[scrutinee value] is non-zero, then
- that value is used as the jump offset, otherwise defaultOffset is used.
- */
- int tableIndex = vPC[1].u.operand;
- int defaultOffset = vPC[2].u.operand;
- JSValue scrutinee = callFrame->r(vPC[3].u.operand).jsValue();
- if (!scrutinee.isString())
- vPC += defaultOffset;
- else {
- StringImpl* value = asString(scrutinee)->value(callFrame).impl();
- if (value->length() != 1)
- vPC += defaultOffset;
- else
- vPC += codeBlock->characterSwitchJumpTable(tableIndex).offsetForValue(value->characters()[0], defaultOffset);
- }
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_switch_string) {
- /* switch_string tableIndex(n) defaultOffset(offset) scrutinee(r)
-
- Performs a sparse hashmap based switch on the value in the scrutinee
- register, using the tableIndex-th string switch jump table. If the
- scrutinee value is a string that exists as a key in the referenced
- jump table, then the value associated with the string is used as the
- jump offset, otherwise defaultOffset is used.
- */
- int tableIndex = vPC[1].u.operand;
- int defaultOffset = vPC[2].u.operand;
- JSValue scrutinee = callFrame->r(vPC[3].u.operand).jsValue();
- if (!scrutinee.isString())
- vPC += defaultOffset;
- else
- vPC += codeBlock->stringSwitchJumpTable(tableIndex).offsetForValue(asString(scrutinee)->value(callFrame).impl(), defaultOffset);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_new_func) {
- /* new_func dst(r) func(f)
-
- Constructs a new Function instance from function func and
- the current scope chain using the original Function
- constructor, using the rules for function declarations, and
- puts the result in register dst.
- */
- int dst = vPC[1].u.operand;
- int func = vPC[2].u.operand;
- int shouldCheck = vPC[3].u.operand;
- ASSERT(codeBlock->codeType() != FunctionCode || !codeBlock->needsFullScopeChain() || callFrame->r(codeBlock->activationRegister()).jsValue());
- if (!shouldCheck || !callFrame->r(dst).jsValue())
- callFrame->uncheckedR(dst) = JSValue(codeBlock->functionDecl(func)->make(callFrame, callFrame->scopeChain()));
-
- vPC += OPCODE_LENGTH(op_new_func);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_new_func_exp) {
- /* new_func_exp dst(r) func(f)
-
- Constructs a new Function instance from function func and
- the current scope chain using the original Function
- constructor, using the rules for function expressions, and
- puts the result in register dst.
- */
- int dst = vPC[1].u.operand;
- int funcIndex = vPC[2].u.operand;
-
- ASSERT(codeBlock->codeType() != FunctionCode || !codeBlock->needsFullScopeChain() || callFrame->r(codeBlock->activationRegister()).jsValue());
- FunctionExecutable* function = codeBlock->functionExpr(funcIndex);
- JSFunction* func = function->make(callFrame, callFrame->scopeChain());
-
- /*
- The Identifier in a FunctionExpression can be referenced from inside
- the FunctionExpression's FunctionBody to allow the function to call
- itself recursively. However, unlike in a FunctionDeclaration, the
- Identifier in a FunctionExpression cannot be referenced from and
- does not affect the scope enclosing the FunctionExpression.
- */
- if (!function->name().isNull()) {
- JSStaticScopeObject* functionScopeObject = new (callFrame) JSStaticScopeObject(callFrame, function->name(), func, ReadOnly | DontDelete);
- func->setScope(*globalData, func->scope()->push(functionScopeObject));
- }
-
- callFrame->uncheckedR(dst) = JSValue(func);
-
- vPC += OPCODE_LENGTH(op_new_func_exp);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_call_eval) {
- /* call_eval func(r) argCount(n) registerOffset(n)
-
- Call a function named "eval" with no explicit "this" value
- (which may therefore be the eval operator). If register
- thisVal is the global object, and register func contains
- that global object's original global eval function, then
- perform the eval operator in local scope (interpreting
- the argument registers as for the "call"
- opcode). Otherwise, act exactly as the "call" opcode would.
- */
-
- int func = vPC[1].u.operand;
- int argCount = vPC[2].u.operand;
- int registerOffset = vPC[3].u.operand;
-
- ASSERT(codeBlock->codeType() != FunctionCode || !codeBlock->needsFullScopeChain() || callFrame->r(codeBlock->activationRegister()).jsValue());
- JSValue funcVal = callFrame->r(func).jsValue();
-
- Register* newCallFrame = callFrame->registers() + registerOffset;
- Register* argv = newCallFrame - RegisterFile::CallFrameHeaderSize - argCount;
- JSValue thisValue = argv[0].jsValue();
- JSGlobalObject* globalObject = callFrame->scopeChain()->globalObject.get();
-
- if (thisValue == globalObject && funcVal == globalObject->evalFunction()) {
- JSValue result = callEval(callFrame, registerFile, argv, argCount, registerOffset);
- if ((exceptionValue = globalData->exception))
- goto vm_throw;
- functionReturnValue = result;
-
- vPC += OPCODE_LENGTH(op_call_eval);
- NEXT_INSTRUCTION();
- }
-
- // We didn't find the blessed version of eval, so process this
- // instruction as a normal function call.
- // fall through to op_call
- }
- DEFINE_OPCODE(op_call) {
- /* call func(r) argCount(n) registerOffset(n)
-
- Perform a function call.
-
- registerOffset is the distance the callFrame pointer should move
- before the VM initializes the new call frame's header.
-
- dst is where op_ret should store its result.
- */
-
- int func = vPC[1].u.operand;
- int argCount = vPC[2].u.operand;
- int registerOffset = vPC[3].u.operand;
-
- JSValue v = callFrame->r(func).jsValue();
-
- CallData callData;
- CallType callType = getCallData(v, callData);
-
- if (callType == CallTypeJS) {
- ScopeChainNode* callDataScopeChain = callData.js.scopeChain;
-
- JSObject* error = callData.js.functionExecutable->compileForCall(callFrame, callDataScopeChain);
- if (UNLIKELY(!!error)) {
- exceptionValue = error;
- goto vm_throw;
- }
-
- CallFrame* previousCallFrame = callFrame;
- CodeBlock* newCodeBlock = &callData.js.functionExecutable->generatedBytecodeForCall();
- callFrame = slideRegisterWindowForCall(newCodeBlock, registerFile, callFrame, registerOffset, argCount);
- if (UNLIKELY(!callFrame)) {
- callFrame = previousCallFrame;
- exceptionValue = createStackOverflowError(callFrame);
- goto vm_throw;
- }
-
- callFrame->init(newCodeBlock, vPC + OPCODE_LENGTH(op_call), callDataScopeChain, previousCallFrame, argCount, asFunction(v));
- codeBlock = newCodeBlock;
- ASSERT(codeBlock == callFrame->codeBlock());
- vPC = newCodeBlock->instructions().begin();
-
-#if ENABLE(OPCODE_STATS)
- OpcodeStats::resetLastInstruction();
-#endif
-
- NEXT_INSTRUCTION();
- }
-
- if (callType == CallTypeHost) {
- ScopeChainNode* scopeChain = callFrame->scopeChain();
- CallFrame* newCallFrame = CallFrame::create(callFrame->registers() + registerOffset);
- if (!registerFile->grow(newCallFrame->registers())) {
- exceptionValue = createStackOverflowError(callFrame);
- goto vm_throw;
- }
-
- newCallFrame->init(0, vPC + OPCODE_LENGTH(op_call), scopeChain, callFrame, argCount, asObject(v));
-
- JSValue returnValue;
- {
- SamplingTool::HostCallRecord callRecord(m_sampler.get());
- returnValue = JSValue::decode(callData.native.function(newCallFrame));
- }
- CHECK_FOR_EXCEPTION();
-
- functionReturnValue = returnValue;
-
- vPC += OPCODE_LENGTH(op_call);
- NEXT_INSTRUCTION();
- }
-
- ASSERT(callType == CallTypeNone);
-
- exceptionValue = createNotAFunctionError(callFrame, v);
- goto vm_throw;
- }
- DEFINE_OPCODE(op_load_varargs) {
- int argCountDst = vPC[1].u.operand;
- int argsOffset = vPC[2].u.operand;
-
- JSValue arguments = callFrame->r(argsOffset).jsValue();
- uint32_t argCount = 0;
- if (!arguments) {
- argCount = (uint32_t)(callFrame->argumentCount());
- argCount = min<uint32_t>(argCount, Arguments::MaxArguments);
- int32_t sizeDelta = argsOffset + argCount + RegisterFile::CallFrameHeaderSize;
- Register* newEnd = callFrame->registers() + sizeDelta;
- if (!registerFile->grow(newEnd) || ((newEnd - callFrame->registers()) != sizeDelta)) {
- exceptionValue = createStackOverflowError(callFrame);
- goto vm_throw;
- }
- ASSERT(!asFunction(callFrame->callee())->isHostFunction());
- int32_t expectedParams = asFunction(callFrame->callee())->jsExecutable()->parameterCount();
- int32_t inplaceArgs = min(static_cast<int32_t>(argCount), expectedParams);
- int32_t i = 0;
- Register* argStore = callFrame->registers() + argsOffset;
-
- // First step is to copy the "expected" parameters from their normal location relative to the callframe
- for (; i < inplaceArgs; i++)
- argStore[i] = callFrame->registers()[i - RegisterFile::CallFrameHeaderSize - expectedParams];
- // Then we copy any additional arguments that may be further up the stack ('-1' to account for 'this')
- for (; i < static_cast<int32_t>(argCount); i++)
- argStore[i] = callFrame->registers()[i - RegisterFile::CallFrameHeaderSize - expectedParams - static_cast<int32_t>(argCount) - 1];
- } else if (!arguments.isUndefinedOrNull()) {
- if (!arguments.isObject()) {
- exceptionValue = createInvalidParamError(callFrame, "Function.prototype.apply", arguments);
- goto vm_throw;
- }
- if (asObject(arguments)->classInfo() == &Arguments::s_info) {
- Arguments* args = asArguments(arguments);
- argCount = args->numProvidedArguments(callFrame);
- argCount = min<uint32_t>(argCount, Arguments::MaxArguments);
- int32_t sizeDelta = argsOffset + argCount + RegisterFile::CallFrameHeaderSize;
- Register* newEnd = callFrame->registers() + sizeDelta;
- if (!registerFile->grow(newEnd) || ((newEnd - callFrame->registers()) != sizeDelta)) {
- exceptionValue = createStackOverflowError(callFrame);
- goto vm_throw;
- }
- args->copyToRegisters(callFrame, callFrame->registers() + argsOffset, argCount);
- } else if (isJSArray(&callFrame->globalData(), arguments)) {
- JSArray* array = asArray(arguments);
- argCount = array->length();
- argCount = min<uint32_t>(argCount, Arguments::MaxArguments);
- int32_t sizeDelta = argsOffset + argCount + RegisterFile::CallFrameHeaderSize;
- Register* newEnd = callFrame->registers() + sizeDelta;
- if (!registerFile->grow(newEnd) || ((newEnd - callFrame->registers()) != sizeDelta)) {
- exceptionValue = createStackOverflowError(callFrame);
- goto vm_throw;
- }
- array->copyToRegisters(callFrame, callFrame->registers() + argsOffset, argCount);
- } else if (asObject(arguments)->inherits(&JSArray::s_info)) {
- JSObject* argObject = asObject(arguments);
- argCount = argObject->get(callFrame, callFrame->propertyNames().length).toUInt32(callFrame);
- argCount = min<uint32_t>(argCount, Arguments::MaxArguments);
- int32_t sizeDelta = argsOffset + argCount + RegisterFile::CallFrameHeaderSize;
- Register* newEnd = callFrame->registers() + sizeDelta;
- if (!registerFile->grow(newEnd) || ((newEnd - callFrame->registers()) != sizeDelta)) {
- exceptionValue = createStackOverflowError(callFrame);
- goto vm_throw;
- }
- Register* argsBuffer = callFrame->registers() + argsOffset;
- for (uint32_t i = 0; i < argCount; ++i) {
- argsBuffer[i] = asObject(arguments)->get(callFrame, i);
- CHECK_FOR_EXCEPTION();
- }
- } else {
- exceptionValue = createInvalidParamError(callFrame, "Function.prototype.apply", arguments);
- goto vm_throw;
- }
- }
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(argCountDst) = Register::withInt(argCount + 1);
- vPC += OPCODE_LENGTH(op_load_varargs);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_call_varargs) {
- /* call_varargs func(r) argCountReg(r) baseRegisterOffset(n)
-
- Perform a function call with a dynamic set of arguments.
-
- registerOffset is the distance the callFrame pointer should move
- before the VM initializes the new call frame's header, excluding
- space for arguments.
-
- dst is where op_ret should store its result.
- */
-
- int func = vPC[1].u.operand;
- int argCountReg = vPC[2].u.operand;
- int registerOffset = vPC[3].u.operand;
-
- JSValue v = callFrame->r(func).jsValue();
- int argCount = callFrame->r(argCountReg).i();
- registerOffset += argCount;
- CallData callData;
- CallType callType = getCallData(v, callData);
-
- if (callType == CallTypeJS) {
- ScopeChainNode* callDataScopeChain = callData.js.scopeChain;
-
- JSObject* error = callData.js.functionExecutable->compileForCall(callFrame, callDataScopeChain);
- if (UNLIKELY(!!error)) {
- exceptionValue = error;
- goto vm_throw;
- }
-
- CallFrame* previousCallFrame = callFrame;
- CodeBlock* newCodeBlock = &callData.js.functionExecutable->generatedBytecodeForCall();
- callFrame = slideRegisterWindowForCall(newCodeBlock, registerFile, callFrame, registerOffset, argCount);
- if (UNLIKELY(!callFrame)) {
- callFrame = previousCallFrame;
- exceptionValue = createStackOverflowError(callFrame);
- goto vm_throw;
- }
-
- callFrame->init(newCodeBlock, vPC + OPCODE_LENGTH(op_call_varargs), callDataScopeChain, previousCallFrame, argCount, asFunction(v));
- codeBlock = newCodeBlock;
- ASSERT(codeBlock == callFrame->codeBlock());
- vPC = newCodeBlock->instructions().begin();
-
-#if ENABLE(OPCODE_STATS)
- OpcodeStats::resetLastInstruction();
-#endif
-
- NEXT_INSTRUCTION();
- }
-
- if (callType == CallTypeHost) {
- ScopeChainNode* scopeChain = callFrame->scopeChain();
- CallFrame* newCallFrame = CallFrame::create(callFrame->registers() + registerOffset);
- if (!registerFile->grow(newCallFrame->registers())) {
- exceptionValue = createStackOverflowError(callFrame);
- goto vm_throw;
- }
- newCallFrame->init(0, vPC + OPCODE_LENGTH(op_call_varargs), scopeChain, callFrame, argCount, asObject(v));
-
- JSValue returnValue;
- {
- SamplingTool::HostCallRecord callRecord(m_sampler.get());
- returnValue = JSValue::decode(callData.native.function(newCallFrame));
- }
- CHECK_FOR_EXCEPTION();
-
- functionReturnValue = returnValue;
-
- vPC += OPCODE_LENGTH(op_call_varargs);
- NEXT_INSTRUCTION();
- }
-
- ASSERT(callType == CallTypeNone);
-
- exceptionValue = createNotAFunctionError(callFrame, v);
- goto vm_throw;
- }
- DEFINE_OPCODE(op_tear_off_activation) {
- /* tear_off_activation activation(r) arguments(r)
-
- Copy locals and named parameters from the register file to the heap.
- Point the bindings in 'activation' and 'arguments' to this new backing
- store. (Note that 'arguments' may not have been created. If created,
- 'arguments' already holds a copy of any extra / unnamed parameters.)
-
- This opcode appears before op_ret in functions that require full scope chains.
- */
-
- int activation = vPC[1].u.operand;
- int arguments = vPC[2].u.operand;
- ASSERT(codeBlock->needsFullScopeChain());
- JSValue activationValue = callFrame->r(activation).jsValue();
- if (activationValue) {
- asActivation(activationValue)->copyRegisters(*globalData);
-
- if (JSValue argumentsValue = callFrame->r(unmodifiedArgumentsRegister(arguments)).jsValue()) {
- if (!codeBlock->isStrictMode())
- asArguments(argumentsValue)->setActivation(*globalData, asActivation(activationValue));
- }
- } else if (JSValue argumentsValue = callFrame->r(unmodifiedArgumentsRegister(arguments)).jsValue()) {
- if (!codeBlock->isStrictMode())
- asArguments(argumentsValue)->copyRegisters(*globalData);
- }
-
- vPC += OPCODE_LENGTH(op_tear_off_activation);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_tear_off_arguments) {
- /* tear_off_arguments arguments(r)
-
- Copy named parameters from the register file to the heap. Point the
- bindings in 'arguments' to this new backing store. (Note that
- 'arguments' may not have been created. If created, 'arguments' already
- holds a copy of any extra / unnamed parameters.)
-
- This opcode appears before op_ret in functions that don't require full
- scope chains, but do use 'arguments'.
- */
-
- int src1 = vPC[1].u.operand;
- ASSERT(!codeBlock->needsFullScopeChain() && codeBlock->ownerExecutable()->usesArguments());
-
- if (JSValue arguments = callFrame->r(unmodifiedArgumentsRegister(src1)).jsValue())
- asArguments(arguments)->copyRegisters(*globalData);
-
- vPC += OPCODE_LENGTH(op_tear_off_arguments);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_ret) {
- /* ret result(r)
-
- Return register result as the return value of the current
- function call, writing it into functionReturnValue.
- In addition, unwind one call frame and restore the scope
- chain, code block instruction pointer and register base
- to those of the calling function.
- */
-
- int result = vPC[1].u.operand;
-
- JSValue returnValue = callFrame->r(result).jsValue();
-
- vPC = callFrame->returnVPC();
- callFrame = callFrame->callerFrame();
-
- if (callFrame->hasHostCallFrameFlag())
- return returnValue;
-
- functionReturnValue = returnValue;
- codeBlock = callFrame->codeBlock();
- ASSERT(codeBlock == callFrame->codeBlock());
-
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_call_put_result) {
- /* op_call_put_result result(r)
-
- Move call result from functionReturnValue to caller's
- expected return value register.
- */
-
- callFrame->uncheckedR(vPC[1].u.operand) = functionReturnValue;
-
- vPC += OPCODE_LENGTH(op_call_put_result);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_ret_object_or_this) {
- /* ret result(r)
-
- Return register result as the return value of the current
- function call, writing it into the caller's expected return
- value register. In addition, unwind one call frame and
- restore the scope chain, code block instruction pointer and
- register base to those of the calling function.
- */
-
- int result = vPC[1].u.operand;
-
- JSValue returnValue = callFrame->r(result).jsValue();
-
- if (UNLIKELY(!returnValue.isObject()))
- returnValue = callFrame->r(vPC[2].u.operand).jsValue();
-
- vPC = callFrame->returnVPC();
- callFrame = callFrame->callerFrame();
-
- if (callFrame->hasHostCallFrameFlag())
- return returnValue;
-
- functionReturnValue = returnValue;
- codeBlock = callFrame->codeBlock();
- ASSERT(codeBlock == callFrame->codeBlock());
-
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_enter) {
- /* enter
-
- Initializes local variables to undefined. If the code block requires
- an activation, enter_with_activation is used instead.
-
- This opcode appears only at the beginning of a code block.
- */
-
- size_t i = 0;
- for (size_t count = codeBlock->m_numVars; i < count; ++i)
- callFrame->uncheckedR(i) = jsUndefined();
-
- vPC += OPCODE_LENGTH(op_enter);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_create_activation) {
- /* create_activation dst(r)
-
- If the activation object for this callframe has not yet been created,
- this creates it and writes it back to dst.
- */
-
- int activationReg = vPC[1].u.operand;
- if (!callFrame->r(activationReg).jsValue()) {
- JSActivation* activation = new (globalData) JSActivation(callFrame, static_cast<FunctionExecutable*>(codeBlock->ownerExecutable()));
- callFrame->r(activationReg) = JSValue(activation);
- callFrame->setScopeChain(callFrame->scopeChain()->push(activation));
- }
- vPC += OPCODE_LENGTH(op_create_activation);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_get_callee) {
- /* op_get_callee callee(r)
-
- Move callee into a register.
- */
-
- callFrame->uncheckedR(vPC[1].u.operand) = JSValue(callFrame->callee());
-
- vPC += OPCODE_LENGTH(op_get_callee);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_create_this) {
- /* op_create_this this(r) proto(r)
-
- Allocate an object as 'this', fr use in construction.
-
- This opcode should only be used at the beginning of a code
- block.
- */
-
- int thisRegister = vPC[1].u.operand;
- int protoRegister = vPC[2].u.operand;
-
- JSFunction* constructor = asFunction(callFrame->callee());
-#if !ASSERT_DISABLED
- ConstructData constructData;
- ASSERT(constructor->getConstructData(constructData) == ConstructTypeJS);
-#endif
-
- Structure* structure;
- JSValue proto = callFrame->r(protoRegister).jsValue();
- if (proto.isObject())
- structure = asObject(proto)->inheritorID(callFrame->globalData());
- else
- structure = constructor->scope()->globalObject->emptyObjectStructure();
- callFrame->uncheckedR(thisRegister) = constructEmptyObject(callFrame, structure);
-
- vPC += OPCODE_LENGTH(op_create_this);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_convert_this) {
- /* convert_this this(r)
-
- Takes the value in the 'this' register, converts it to a
- value that is suitable for use as the 'this' value, and
- stores it in the 'this' register. This opcode is emitted
- to avoid doing the conversion in the caller unnecessarily.
-
- This opcode should only be used at the beginning of a code
- block.
- */
-
- int thisRegister = vPC[1].u.operand;
- JSValue thisVal = callFrame->r(thisRegister).jsValue();
- if (thisVal.needsThisConversion())
- callFrame->uncheckedR(thisRegister) = JSValue(thisVal.toThisObject(callFrame));
-
- vPC += OPCODE_LENGTH(op_convert_this);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_convert_this_strict) {
- /* convert_this_strict this(r)
-
- Takes the value in the 'this' register, and converts it to
- its "this" form if (and only if) "this" is an object with a
- custom this conversion
-
- This opcode should only be used at the beginning of a code
- block.
- */
-
- int thisRegister = vPC[1].u.operand;
- JSValue thisVal = callFrame->r(thisRegister).jsValue();
- if (thisVal.isObject() && thisVal.needsThisConversion())
- callFrame->uncheckedR(thisRegister) = JSValue(thisVal.toStrictThisObject(callFrame));
-
- vPC += OPCODE_LENGTH(op_convert_this_strict);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_init_lazy_reg) {
- /* init_lazy_reg dst(r)
-
- Initialises dst(r) to JSValue().
-
- This opcode appears only at the beginning of a code block.
- */
- int dst = vPC[1].u.operand;
-
- callFrame->uncheckedR(dst) = JSValue();
- vPC += OPCODE_LENGTH(op_init_lazy_reg);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_create_arguments) {
- /* create_arguments dst(r)
-
- Creates the 'arguments' object and places it in both the
- 'arguments' call frame slot and the local 'arguments'
- register, if it has not already been initialised.
- */
-
- int dst = vPC[1].u.operand;
-
- if (!callFrame->r(dst).jsValue()) {
- Arguments* arguments = new (globalData) Arguments(callFrame);
- callFrame->uncheckedR(dst) = JSValue(arguments);
- callFrame->uncheckedR(unmodifiedArgumentsRegister(dst)) = JSValue(arguments);
- }
- vPC += OPCODE_LENGTH(op_create_arguments);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_construct) {
- /* construct func(r) argCount(n) registerOffset(n) proto(r) thisRegister(r)
-
- Invoke register "func" as a constructor. For JS
- functions, the calling convention is exactly as for the
- "call" opcode, except that the "this" value is a newly
- created Object. For native constructors, no "this"
- value is passed. In either case, the argCount and registerOffset
- registers are interpreted as for the "call" opcode.
-
- Register proto must contain the prototype property of
- register func. This is to enable polymorphic inline
- caching of this lookup.
- */
-
- int func = vPC[1].u.operand;
- int argCount = vPC[2].u.operand;
- int registerOffset = vPC[3].u.operand;
-
- JSValue v = callFrame->r(func).jsValue();
-
- ConstructData constructData;
- ConstructType constructType = getConstructData(v, constructData);
-
- if (constructType == ConstructTypeJS) {
- ScopeChainNode* callDataScopeChain = constructData.js.scopeChain;
-
- JSObject* error = constructData.js.functionExecutable->compileForConstruct(callFrame, callDataScopeChain);
- if (UNLIKELY(!!error)) {
- exceptionValue = error;
- goto vm_throw;
- }
-
- CallFrame* previousCallFrame = callFrame;
- CodeBlock* newCodeBlock = &constructData.js.functionExecutable->generatedBytecodeForConstruct();
- callFrame = slideRegisterWindowForCall(newCodeBlock, registerFile, callFrame, registerOffset, argCount);
- if (UNLIKELY(!callFrame)) {
- callFrame = previousCallFrame;
- exceptionValue = createStackOverflowError(callFrame);
- goto vm_throw;
- }
-
- callFrame->init(newCodeBlock, vPC + OPCODE_LENGTH(op_construct), callDataScopeChain, previousCallFrame, argCount, asFunction(v));
- codeBlock = newCodeBlock;
- vPC = newCodeBlock->instructions().begin();
-#if ENABLE(OPCODE_STATS)
- OpcodeStats::resetLastInstruction();
-#endif
-
- NEXT_INSTRUCTION();
- }
-
- if (constructType == ConstructTypeHost) {
- ScopeChainNode* scopeChain = callFrame->scopeChain();
- CallFrame* newCallFrame = CallFrame::create(callFrame->registers() + registerOffset);
- if (!registerFile->grow(newCallFrame->registers())) {
- exceptionValue = createStackOverflowError(callFrame);
- goto vm_throw;
- }
- newCallFrame->init(0, vPC + OPCODE_LENGTH(op_construct), scopeChain, callFrame, argCount, asObject(v));
-
- JSValue returnValue;
- {
- SamplingTool::HostCallRecord callRecord(m_sampler.get());
- returnValue = JSValue::decode(constructData.native.function(newCallFrame));
- }
- CHECK_FOR_EXCEPTION();
- functionReturnValue = returnValue;
-
- vPC += OPCODE_LENGTH(op_construct);
- NEXT_INSTRUCTION();
- }
-
- ASSERT(constructType == ConstructTypeNone);
-
- exceptionValue = createNotAConstructorError(callFrame, v);
- goto vm_throw;
- }
- DEFINE_OPCODE(op_strcat) {
- /* strcat dst(r) src(r) count(n)
-
- Construct a new String instance using the original
- constructor, and puts the result in register dst.
- The string will be the result of concatenating count
- strings with values taken from registers starting at
- register src.
- */
- int dst = vPC[1].u.operand;
- int src = vPC[2].u.operand;
- int count = vPC[3].u.operand;
-
- callFrame->uncheckedR(dst) = concatenateStrings(callFrame, &callFrame->registers()[src], count);
- CHECK_FOR_EXCEPTION();
- vPC += OPCODE_LENGTH(op_strcat);
-
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_to_primitive) {
- int dst = vPC[1].u.operand;
- int src = vPC[2].u.operand;
-
- callFrame->uncheckedR(dst) = callFrame->r(src).jsValue().toPrimitive(callFrame);
- vPC += OPCODE_LENGTH(op_to_primitive);
-
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_push_scope) {
- /* push_scope scope(r)
-
- Converts register scope to object, and pushes it onto the top
- of the current scope chain. The contents of the register scope
- are replaced by the result of toObject conversion of the scope.
- */
- int scope = vPC[1].u.operand;
- JSValue v = callFrame->r(scope).jsValue();
- JSObject* o = v.toObject(callFrame);
- CHECK_FOR_EXCEPTION();
-
- callFrame->uncheckedR(scope) = JSValue(o);
- callFrame->setScopeChain(callFrame->scopeChain()->push(o));
-
- vPC += OPCODE_LENGTH(op_push_scope);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_pop_scope) {
- /* pop_scope
-
- Removes the top item from the current scope chain.
- */
- callFrame->setScopeChain(callFrame->scopeChain()->pop());
-
- vPC += OPCODE_LENGTH(op_pop_scope);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_get_pnames) {
- /* get_pnames dst(r) base(r) i(n) size(n) breakTarget(offset)
-
- Creates a property name list for register base and puts it
- in register dst, initializing i and size for iteration. If
- base is undefined or null, jumps to breakTarget.
- */
- int dst = vPC[1].u.operand;
- int base = vPC[2].u.operand;
- int i = vPC[3].u.operand;
- int size = vPC[4].u.operand;
- int breakTarget = vPC[5].u.operand;
-
- JSValue v = callFrame->r(base).jsValue();
- if (v.isUndefinedOrNull()) {
- vPC += breakTarget;
- NEXT_INSTRUCTION();
- }
-
- JSObject* o = v.toObject(callFrame);
- Structure* structure = o->structure();
- JSPropertyNameIterator* jsPropertyNameIterator = structure->enumerationCache();
- if (!jsPropertyNameIterator || jsPropertyNameIterator->cachedPrototypeChain() != structure->prototypeChain(callFrame))
- jsPropertyNameIterator = JSPropertyNameIterator::create(callFrame, o);
-
- callFrame->uncheckedR(dst) = jsPropertyNameIterator;
- callFrame->uncheckedR(base) = JSValue(o);
- callFrame->uncheckedR(i) = Register::withInt(0);
- callFrame->uncheckedR(size) = Register::withInt(jsPropertyNameIterator->size());
- vPC += OPCODE_LENGTH(op_get_pnames);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_next_pname) {
- /* next_pname dst(r) base(r) i(n) size(n) iter(r) target(offset)
-
- Copies the next name from the property name list in
- register iter to dst, then jumps to offset target. If there are no
- names left, invalidates the iterator and continues to the next
- instruction.
- */
- int dst = vPC[1].u.operand;
- int base = vPC[2].u.operand;
- int i = vPC[3].u.operand;
- int size = vPC[4].u.operand;
- int iter = vPC[5].u.operand;
- int target = vPC[6].u.operand;
-
- JSPropertyNameIterator* it = callFrame->r(iter).propertyNameIterator();
- while (callFrame->r(i).i() != callFrame->r(size).i()) {
- JSValue key = it->get(callFrame, asObject(callFrame->r(base).jsValue()), callFrame->r(i).i());
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(i) = Register::withInt(callFrame->r(i).i() + 1);
- if (key) {
- CHECK_FOR_TIMEOUT();
- callFrame->uncheckedR(dst) = key;
- vPC += target;
- NEXT_INSTRUCTION();
- }
- }
-
- vPC += OPCODE_LENGTH(op_next_pname);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_jmp_scopes) {
- /* jmp_scopes count(n) target(offset)
-
- Removes the a number of items from the current scope chain
- specified by immediate number count, then jumps to offset
- target.
- */
- int count = vPC[1].u.operand;
- int target = vPC[2].u.operand;
-
- ScopeChainNode* tmp = callFrame->scopeChain();
- while (count--)
- tmp = tmp->pop();
- callFrame->setScopeChain(tmp);
-
- vPC += target;
- NEXT_INSTRUCTION();
- }
-#if ENABLE(COMPUTED_GOTO_INTERPRETER)
- // Appease GCC
- goto *(&&skip_new_scope);
-#endif
- DEFINE_OPCODE(op_push_new_scope) {
- /* new_scope dst(r) property(id) value(r)
-
- Constructs a new StaticScopeObject with property set to value. That scope
- object is then pushed onto the ScopeChain. The scope object is then stored
- in dst for GC.
- */
- callFrame->setScopeChain(createExceptionScope(callFrame, vPC));
-
- vPC += OPCODE_LENGTH(op_push_new_scope);
- NEXT_INSTRUCTION();
- }
-#if ENABLE(COMPUTED_GOTO_INTERPRETER)
- skip_new_scope:
-#endif
- DEFINE_OPCODE(op_catch) {
- /* catch ex(r)
-
- Retrieves the VM's current exception and puts it in register
- ex. This is only valid after an exception has been raised,
- and usually forms the beginning of an exception handler.
- */
- ASSERT(exceptionValue);
- ASSERT(!globalData->exception);
- int ex = vPC[1].u.operand;
- callFrame->uncheckedR(ex) = exceptionValue;
- exceptionValue = JSValue();
-
- vPC += OPCODE_LENGTH(op_catch);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_throw) {
- /* throw ex(r)
-
- Throws register ex as an exception. This involves three
- steps: first, it is set as the current exception in the
- VM's internal state, then the stack is unwound until an
- exception handler or a native code boundary is found, and
- then control resumes at the exception handler if any or
- else the script returns control to the nearest native caller.
- */
-
- int ex = vPC[1].u.operand;
- exceptionValue = callFrame->r(ex).jsValue();
-
- handler = throwException(callFrame, exceptionValue, vPC - codeBlock->instructions().begin());
- if (!handler)
- return throwError(callFrame, exceptionValue);
-
- codeBlock = callFrame->codeBlock();
- vPC = codeBlock->instructions().begin() + handler->target;
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_throw_reference_error) {
- /* op_throw_reference_error message(k)
-
- Constructs a new reference Error instance using the
- original constructor, using constant message as the
- message string. The result is thrown.
- */
- UString message = callFrame->r(vPC[1].u.operand).jsValue().toString(callFrame);
- exceptionValue = JSValue(createReferenceError(callFrame, message));
- goto vm_throw;
- }
- DEFINE_OPCODE(op_end) {
- /* end result(r)
-
- Return register result as the value of a global or eval
- program. Return control to the calling native code.
- */
-
- int result = vPC[1].u.operand;
- return callFrame->r(result).jsValue();
- }
- DEFINE_OPCODE(op_put_getter) {
- /* put_getter base(r) property(id) function(r)
-
- Sets register function on register base as the getter named
- by identifier property. Base and function are assumed to be
- objects as this op should only be used for getters defined
- in object literal form.
-
- Unlike many opcodes, this one does not write any output to
- the register file.
- */
- int base = vPC[1].u.operand;
- int property = vPC[2].u.operand;
- int function = vPC[3].u.operand;
-
- ASSERT(callFrame->r(base).jsValue().isObject());
- JSObject* baseObj = asObject(callFrame->r(base).jsValue());
- Identifier& ident = codeBlock->identifier(property);
- ASSERT(callFrame->r(function).jsValue().isObject());
- baseObj->defineGetter(callFrame, ident, asObject(callFrame->r(function).jsValue()));
-
- vPC += OPCODE_LENGTH(op_put_getter);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_put_setter) {
- /* put_setter base(r) property(id) function(r)
-
- Sets register function on register base as the setter named
- by identifier property. Base and function are assumed to be
- objects as this op should only be used for setters defined
- in object literal form.
-
- Unlike many opcodes, this one does not write any output to
- the register file.
- */
- int base = vPC[1].u.operand;
- int property = vPC[2].u.operand;
- int function = vPC[3].u.operand;
-
- ASSERT(callFrame->r(base).jsValue().isObject());
- JSObject* baseObj = asObject(callFrame->r(base).jsValue());
- Identifier& ident = codeBlock->identifier(property);
- ASSERT(callFrame->r(function).jsValue().isObject());
- baseObj->defineSetter(callFrame, ident, asObject(callFrame->r(function).jsValue()), 0);
-
- vPC += OPCODE_LENGTH(op_put_setter);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_method_check) {
- vPC++;
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_jsr) {
- /* jsr retAddrDst(r) target(offset)
-
- Places the address of the next instruction into the retAddrDst
- register and jumps to offset target from the current instruction.
- */
- int retAddrDst = vPC[1].u.operand;
- int target = vPC[2].u.operand;
- callFrame->r(retAddrDst) = vPC + OPCODE_LENGTH(op_jsr);
-
- vPC += target;
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_sret) {
- /* sret retAddrSrc(r)
-
- Jumps to the address stored in the retAddrSrc register. This
- differs from op_jmp because the target address is stored in a
- register, not as an immediate.
- */
- int retAddrSrc = vPC[1].u.operand;
- vPC = callFrame->r(retAddrSrc).vPC();
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_debug) {
- /* debug debugHookID(n) firstLine(n) lastLine(n)
-
- Notifies the debugger of the current state of execution. This opcode
- is only generated while the debugger is attached.
- */
- int debugHookID = vPC[1].u.operand;
- int firstLine = vPC[2].u.operand;
- int lastLine = vPC[3].u.operand;
-
- debug(callFrame, static_cast<DebugHookID>(debugHookID), firstLine, lastLine);
-
- vPC += OPCODE_LENGTH(op_debug);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_profile_will_call) {
- /* op_profile_will_call function(r)
-
- Notifies the profiler of the beginning of a function call. This opcode
- is only generated if developer tools are enabled.
- */
- int function = vPC[1].u.operand;
-
- if (*enabledProfilerReference)
- (*enabledProfilerReference)->willExecute(callFrame, callFrame->r(function).jsValue());
-
- vPC += OPCODE_LENGTH(op_profile_will_call);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_profile_did_call) {
- /* op_profile_did_call function(r)
-
- Notifies the profiler of the end of a function call. This opcode
- is only generated if developer tools are enabled.
- */
- int function = vPC[1].u.operand;
-
- if (*enabledProfilerReference)
- (*enabledProfilerReference)->didExecute(callFrame, callFrame->r(function).jsValue());
-
- vPC += OPCODE_LENGTH(op_profile_did_call);
- NEXT_INSTRUCTION();
- }
- vm_throw: {
- globalData->exception = JSValue();
- if (!tickCount) {
- // The exceptionValue is a lie! (GCC produces bad code for reasons I
- // cannot fathom if we don't assign to the exceptionValue before branching)
- exceptionValue = createInterruptedExecutionException(globalData);
- }
- JSGlobalObject* globalObject = callFrame->lexicalGlobalObject();
- handler = throwException(callFrame, exceptionValue, vPC - codeBlock->instructions().begin());
- if (!handler) {
- // Can't use the callframe at this point as the scopechain, etc have
- // been released.
- return throwError(globalObject->globalExec(), exceptionValue);
- }
-
- codeBlock = callFrame->codeBlock();
- vPC = codeBlock->instructions().begin() + handler->target;
- NEXT_INSTRUCTION();
- }
- }
-#if !ENABLE(COMPUTED_GOTO_INTERPRETER)
- } // iterator loop ends
-#endif
- #undef NEXT_INSTRUCTION
- #undef DEFINE_OPCODE
- #undef CHECK_FOR_EXCEPTION
- #undef CHECK_FOR_TIMEOUT
-#endif // ENABLE(INTERPRETER)
-}
-
-JSValue Interpreter::retrieveArguments(CallFrame* callFrame, JSFunction* function) const
-{
- CallFrame* functionCallFrame = findFunctionCallFrame(callFrame, function);
- if (!functionCallFrame)
- return jsNull();
-
- CodeBlock* codeBlock = functionCallFrame->codeBlock();
- if (codeBlock->usesArguments()) {
- ASSERT(codeBlock->codeType() == FunctionCode);
- int argumentsRegister = codeBlock->argumentsRegister();
- int realArgumentsRegister = unmodifiedArgumentsRegister(argumentsRegister);
- if (JSValue arguments = functionCallFrame->uncheckedR(argumentsRegister).jsValue())
- return arguments;
- JSValue arguments = JSValue(new (callFrame) Arguments(functionCallFrame));
- functionCallFrame->r(argumentsRegister) = arguments;
- functionCallFrame->r(realArgumentsRegister) = arguments;
- return arguments;
- }
-
- Arguments* arguments = new (functionCallFrame) Arguments(functionCallFrame);
- arguments->copyRegisters(functionCallFrame->globalData());
- return arguments;
-}
-
-JSValue Interpreter::retrieveCaller(CallFrame* callFrame, JSFunction* function) const
-{
- CallFrame* functionCallFrame = findFunctionCallFrame(callFrame, function);
- if (!functionCallFrame)
- return jsNull();
-
- CallFrame* callerFrame = functionCallFrame->callerFrame();
- if (callerFrame->hasHostCallFrameFlag())
- return jsNull();
-
- JSValue caller = callerFrame->callee();
- if (!caller)
- return jsNull();
-
- return caller;
-}
-
-void Interpreter::retrieveLastCaller(CallFrame* callFrame, int& lineNumber, intptr_t& sourceID, UString& sourceURL, JSValue& function) const
-{
- function = JSValue();
- lineNumber = -1;
- sourceURL = UString();
-
- CallFrame* callerFrame = callFrame->callerFrame();
- if (callerFrame->hasHostCallFrameFlag())
- return;
-
- CodeBlock* callerCodeBlock = callerFrame->codeBlock();
- if (!callerCodeBlock)
- return;
- unsigned bytecodeOffset = 0;
-#if ENABLE(INTERPRETER)
- if (!callerFrame->globalData().canUseJIT())
- bytecodeOffset = callerCodeBlock->bytecodeOffset(callFrame->returnVPC());
-#if ENABLE(JIT)
- else
- bytecodeOffset = callerCodeBlock->bytecodeOffset(callFrame->returnPC());
-#endif
-#else
- bytecodeOffset = callerCodeBlock->bytecodeOffset(callFrame->returnPC());
-#endif
- lineNumber = callerCodeBlock->lineNumberForBytecodeOffset(bytecodeOffset - 1);
- sourceID = callerCodeBlock->ownerExecutable()->sourceID();
- sourceURL = callerCodeBlock->ownerExecutable()->sourceURL();
- function = callerFrame->callee();
-}
-
-CallFrame* Interpreter::findFunctionCallFrame(CallFrame* callFrame, JSFunction* function)
-{
- for (CallFrame* candidate = callFrame; candidate; candidate = candidate->callerFrame()->removeHostCallFrameFlag()) {
- if (candidate->callee() == function)
- return candidate;
- }
- return 0;
-}
projects / apple / javascriptcore.git / blobdiff