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1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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4842 } | 4842 } |
4843 | 4843 |
4844 | 4844 |
4845 void CEntryStub::GenerateAheadOfTime() { | 4845 void CEntryStub::GenerateAheadOfTime() { |
4846 CEntryStub stub(1, kDontSaveFPRegs); | 4846 CEntryStub stub(1, kDontSaveFPRegs); |
4847 Handle<Code> code = stub.GetCode(); | 4847 Handle<Code> code = stub.GetCode(); |
4848 code->set_is_pregenerated(true); | 4848 code->set_is_pregenerated(true); |
4849 } | 4849 } |
4850 | 4850 |
4851 | 4851 |
| 4852 static void JumpIfOOM(MacroAssembler* masm, |
| 4853 Register value, |
| 4854 Register scratch, |
| 4855 Label* oom_label) { |
| 4856 __ mov(scratch, value); |
| 4857 STATIC_ASSERT(Failure::OUT_OF_MEMORY_EXCEPTION == 3); |
| 4858 STATIC_ASSERT(kFailureTag == 3); |
| 4859 __ and_(scratch, 0xf); |
| 4860 __ cmp(scratch, 0xf); |
| 4861 __ j(equal, oom_label); |
| 4862 } |
| 4863 |
| 4864 |
4852 void CEntryStub::GenerateCore(MacroAssembler* masm, | 4865 void CEntryStub::GenerateCore(MacroAssembler* masm, |
4853 Label* throw_normal_exception, | 4866 Label* throw_normal_exception, |
4854 Label* throw_termination_exception, | 4867 Label* throw_termination_exception, |
4855 Label* throw_out_of_memory_exception, | 4868 Label* throw_out_of_memory_exception, |
4856 bool do_gc, | 4869 bool do_gc, |
4857 bool always_allocate_scope) { | 4870 bool always_allocate_scope) { |
4858 // eax: result parameter for PerformGC, if any | 4871 // eax: result parameter for PerformGC, if any |
4859 // ebx: pointer to C function (C callee-saved) | 4872 // ebx: pointer to C function (C callee-saved) |
4860 // ebp: frame pointer (restored after C call) | 4873 // ebp: frame pointer (restored after C call) |
4861 // esp: stack pointer (restored after C call) | 4874 // esp: stack pointer (restored after C call) |
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4939 // Handling of failure. | 4952 // Handling of failure. |
4940 __ bind(&failure_returned); | 4953 __ bind(&failure_returned); |
4941 | 4954 |
4942 Label retry; | 4955 Label retry; |
4943 // If the returned exception is RETRY_AFTER_GC continue at retry label | 4956 // If the returned exception is RETRY_AFTER_GC continue at retry label |
4944 STATIC_ASSERT(Failure::RETRY_AFTER_GC == 0); | 4957 STATIC_ASSERT(Failure::RETRY_AFTER_GC == 0); |
4945 __ test(eax, Immediate(((1 << kFailureTypeTagSize) - 1) << kFailureTagSize)); | 4958 __ test(eax, Immediate(((1 << kFailureTypeTagSize) - 1) << kFailureTagSize)); |
4946 __ j(zero, &retry, Label::kNear); | 4959 __ j(zero, &retry, Label::kNear); |
4947 | 4960 |
4948 // Special handling of out of memory exceptions. | 4961 // Special handling of out of memory exceptions. |
4949 __ cmp(eax, reinterpret_cast<int32_t>(Failure::OutOfMemoryException())); | 4962 JumpIfOOM(masm, eax, ecx, throw_out_of_memory_exception); |
4950 __ j(equal, throw_out_of_memory_exception); | |
4951 | 4963 |
4952 // Retrieve the pending exception and clear the variable. | 4964 // Retrieve the pending exception and clear the variable. |
4953 __ mov(eax, Operand::StaticVariable(pending_exception_address)); | 4965 __ mov(eax, Operand::StaticVariable(pending_exception_address)); |
4954 __ mov(edx, Immediate(masm->isolate()->factory()->the_hole_value())); | 4966 __ mov(edx, Immediate(masm->isolate()->factory()->the_hole_value())); |
4955 __ mov(Operand::StaticVariable(pending_exception_address), edx); | 4967 __ mov(Operand::StaticVariable(pending_exception_address), edx); |
4956 | 4968 |
4957 // Special handling of termination exceptions which are uncatchable | 4969 // Special handling of termination exceptions which are uncatchable |
4958 // by javascript code. | 4970 // by javascript code. |
4959 __ cmp(eax, masm->isolate()->factory()->termination_exception()); | 4971 __ cmp(eax, masm->isolate()->factory()->termination_exception()); |
4960 __ j(equal, throw_termination_exception); | 4972 __ j(equal, throw_termination_exception); |
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5022 __ bind(&throw_out_of_memory_exception); | 5034 __ bind(&throw_out_of_memory_exception); |
5023 // Set external caught exception to false. | 5035 // Set external caught exception to false. |
5024 Isolate* isolate = masm->isolate(); | 5036 Isolate* isolate = masm->isolate(); |
5025 ExternalReference external_caught(Isolate::kExternalCaughtExceptionAddress, | 5037 ExternalReference external_caught(Isolate::kExternalCaughtExceptionAddress, |
5026 isolate); | 5038 isolate); |
5027 __ mov(Operand::StaticVariable(external_caught), Immediate(false)); | 5039 __ mov(Operand::StaticVariable(external_caught), Immediate(false)); |
5028 | 5040 |
5029 // Set pending exception and eax to out of memory exception. | 5041 // Set pending exception and eax to out of memory exception. |
5030 ExternalReference pending_exception(Isolate::kPendingExceptionAddress, | 5042 ExternalReference pending_exception(Isolate::kPendingExceptionAddress, |
5031 isolate); | 5043 isolate); |
5032 __ mov(eax, reinterpret_cast<int32_t>(Failure::OutOfMemoryException())); | 5044 Label already_have_failure; |
| 5045 JumpIfOOM(masm, eax, ecx, &already_have_failure); |
| 5046 __ mov(eax, reinterpret_cast<int32_t>(Failure::OutOfMemoryException(0x1))); |
| 5047 __ bind(&already_have_failure); |
5033 __ mov(Operand::StaticVariable(pending_exception), eax); | 5048 __ mov(Operand::StaticVariable(pending_exception), eax); |
5034 // Fall through to the next label. | 5049 // Fall through to the next label. |
5035 | 5050 |
5036 __ bind(&throw_termination_exception); | 5051 __ bind(&throw_termination_exception); |
5037 __ ThrowUncatchable(eax); | 5052 __ ThrowUncatchable(eax); |
5038 | 5053 |
5039 __ bind(&throw_normal_exception); | 5054 __ bind(&throw_normal_exception); |
5040 __ Throw(eax); | 5055 __ Throw(eax); |
5041 } | 5056 } |
5042 | 5057 |
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7476 // Restore ecx. | 7491 // Restore ecx. |
7477 __ pop(ecx); | 7492 __ pop(ecx); |
7478 __ ret(0); | 7493 __ ret(0); |
7479 } | 7494 } |
7480 | 7495 |
7481 #undef __ | 7496 #undef __ |
7482 | 7497 |
7483 } } // namespace v8::internal | 7498 } } // namespace v8::internal |
7484 | 7499 |
7485 #endif // V8_TARGET_ARCH_IA32 | 7500 #endif // V8_TARGET_ARCH_IA32 |
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