diff options
Diffstat (limited to 'chromium/v8/src/builtins/ia32/builtins-ia32.cc')
| -rw-r--r-- | chromium/v8/src/builtins/ia32/builtins-ia32.cc | 56 |
1 files changed, 33 insertions, 23 deletions
diff --git a/chromium/v8/src/builtins/ia32/builtins-ia32.cc b/chromium/v8/src/builtins/ia32/builtins-ia32.cc index 69ddc00d0e8..9bccfd46f15 100644 --- a/chromium/v8/src/builtins/ia32/builtins-ia32.cc +++ b/chromium/v8/src/builtins/ia32/builtins-ia32.cc @@ -67,6 +67,30 @@ static void GenerateTailCallToReturnedCode(MacroAssembler* masm, namespace { +void Generate_StackOverflowCheck(MacroAssembler* masm, Register num_args, + Register scratch, Label* stack_overflow, + bool include_receiver = false) { + // Check the stack for overflow. We are not trying to catch + // interruptions (e.g. debug break and preemption) here, so the "real stack + // limit" is checked. + ExternalReference real_stack_limit = + ExternalReference::address_of_real_stack_limit(masm->isolate()); + // Compute the space that is left as a negative number in scratch. If + // we already overflowed, this will be a positive number. + __ mov(scratch, Operand::StaticVariable(real_stack_limit)); + __ sub(scratch, esp); + // Add the size of the arguments. + static_assert(kPointerSize == 4, + "The next instruction assumes kPointerSize == 4"); + __ lea(scratch, Operand(scratch, num_args, times_4, 0)); + if (include_receiver) { + __ add(scratch, Immediate(kPointerSize)); + } + // See if we overflowed, i.e. scratch is positive. + __ cmp(scratch, Immediate(0)); + __ j(greater, stack_overflow); // Signed comparison. +} + void Generate_JSBuiltinsConstructStubHelper(MacroAssembler* masm) { // ----------- S t a t e ------------- // -- eax: number of arguments @@ -75,6 +99,9 @@ void Generate_JSBuiltinsConstructStubHelper(MacroAssembler* masm) { // -- esi: context // ----------------------------------- + Label stack_overflow; + Generate_StackOverflowCheck(masm, eax, ecx, &stack_overflow); + // Enter a construct frame. { FrameScope scope(masm, StackFrame::CONSTRUCT); @@ -131,32 +158,15 @@ void Generate_JSBuiltinsConstructStubHelper(MacroAssembler* masm) { __ lea(esp, Operand(esp, ebx, times_2, 1 * kPointerSize)); // 1 ~ receiver __ push(ecx); __ ret(0); -} - -void Generate_StackOverflowCheck(MacroAssembler* masm, Register num_args, - Register scratch, Label* stack_overflow, - bool include_receiver = false) { - // Check the stack for overflow. We are not trying to catch - // interruptions (e.g. debug break and preemption) here, so the "real stack - // limit" is checked. - ExternalReference real_stack_limit = - ExternalReference::address_of_real_stack_limit(masm->isolate()); - // Compute the space that is left as a negative number in scratch. If - // we already overflowed, this will be a positive number. - __ mov(scratch, Operand::StaticVariable(real_stack_limit)); - __ sub(scratch, esp); - // Add the size of the arguments. - static_assert(kPointerSize == 4, - "The next instruction assumes kPointerSize == 4"); - __ lea(scratch, Operand(scratch, num_args, times_4, 0)); - if (include_receiver) { - __ add(scratch, Immediate(kPointerSize)); + __ bind(&stack_overflow); + { + FrameScope scope(masm, StackFrame::INTERNAL); + __ CallRuntime(Runtime::kThrowStackOverflow); + __ int3(); // This should be unreachable. } - // See if we overflowed, i.e. scratch is positive. - __ cmp(scratch, Immediate(0)); - __ j(greater, stack_overflow); // Signed comparison. } + } // namespace // The construct stub for ES5 constructor functions and ES6 class constructors. |