Index: src/x64/code-stubs-x64.cc |
diff --git a/src/x64/code-stubs-x64.cc b/src/x64/code-stubs-x64.cc |
index dc5496cbfc1cc9257fb4547043b4731f21bc1013..ce820b1b94044cc85872f89697cc1eba3b852850 100644 |
--- a/src/x64/code-stubs-x64.cc |
+++ b/src/x64/code-stubs-x64.cc |
@@ -2407,9 +2407,23 @@ void CEntryStub::GenerateAheadOfTime(Isolate* isolate) { |
} |
+static void JumpIfOOM(MacroAssembler* masm, |
+ Register value, |
+ Register scratch, |
+ Label* oom_label) { |
+ __ movp(scratch, value); |
+ STATIC_ASSERT(Failure::OUT_OF_MEMORY_EXCEPTION == 3); |
+ STATIC_ASSERT(kFailureTag == 3); |
+ __ and_(scratch, Immediate(0xf)); |
+ __ cmpq(scratch, Immediate(0xf)); |
+ __ j(equal, oom_label); |
+} |
+ |
+ |
void CEntryStub::GenerateCore(MacroAssembler* masm, |
Label* throw_normal_exception, |
Label* throw_termination_exception, |
+ Label* throw_out_of_memory_exception, |
bool do_gc, |
bool always_allocate_scope) { |
// rax: result parameter for PerformGC, if any. |
@@ -2516,6 +2530,9 @@ void CEntryStub::GenerateCore(MacroAssembler* masm, |
__ testl(rax, Immediate(((1 << kFailureTypeTagSize) - 1) << kFailureTagSize)); |
__ j(zero, &retry, Label::kNear); |
+ // Special handling of out of memory exceptions. |
+ JumpIfOOM(masm, rax, kScratchRegister, throw_out_of_memory_exception); |
+ |
// Retrieve the pending exception. |
ExternalReference pending_exception_address( |
Isolate::kPendingExceptionAddress, masm->isolate()); |
@@ -2523,6 +2540,9 @@ void CEntryStub::GenerateCore(MacroAssembler* masm, |
masm->ExternalOperand(pending_exception_address); |
__ movp(rax, pending_exception_operand); |
+ // See if we just retrieved an OOM exception. |
+ JumpIfOOM(masm, rax, kScratchRegister, throw_out_of_memory_exception); |
+ |
// Clear the pending exception. |
pending_exception_operand = |
masm->ExternalOperand(pending_exception_address); |
@@ -2578,11 +2598,13 @@ void CEntryStub::Generate(MacroAssembler* masm) { |
Label throw_normal_exception; |
Label throw_termination_exception; |
+ Label throw_out_of_memory_exception; |
// Call into the runtime system. |
GenerateCore(masm, |
&throw_normal_exception, |
&throw_termination_exception, |
+ &throw_out_of_memory_exception, |
false, |
false); |
@@ -2590,6 +2612,7 @@ void CEntryStub::Generate(MacroAssembler* masm) { |
GenerateCore(masm, |
&throw_normal_exception, |
&throw_termination_exception, |
+ &throw_out_of_memory_exception, |
true, |
false); |
@@ -2599,9 +2622,28 @@ void CEntryStub::Generate(MacroAssembler* masm) { |
GenerateCore(masm, |
&throw_normal_exception, |
&throw_termination_exception, |
+ &throw_out_of_memory_exception, |
true, |
true); |
+ __ bind(&throw_out_of_memory_exception); |
+ // Set external caught exception to false. |
+ Isolate* isolate = masm->isolate(); |
+ ExternalReference external_caught(Isolate::kExternalCaughtExceptionAddress, |
+ isolate); |
+ __ Set(rax, static_cast<int64_t>(false)); |
+ __ Store(external_caught, rax); |
+ |
+ // Set pending exception and rax to out of memory exception. |
+ ExternalReference pending_exception(Isolate::kPendingExceptionAddress, |
+ isolate); |
+ Label already_have_failure; |
+ JumpIfOOM(masm, rax, kScratchRegister, &already_have_failure); |
+ __ Move(rax, Failure::OutOfMemoryException(0x1), Assembler::RelocInfoNone()); |
+ __ bind(&already_have_failure); |
+ __ Store(pending_exception, rax); |
+ // Fall through to the next label. |
+ |
__ bind(&throw_termination_exception); |
__ ThrowUncatchable(rax); |