 Chromium Code Reviews
 Chromium Code Reviews Issue 215853005:
  Check stack limit in ArgumentAdaptorTrampoline.  (Closed) 
  Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
    
  
    Issue 215853005:
  Check stack limit in ArgumentAdaptorTrampoline.  (Closed) 
  Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge| Index: src/ia32/builtins-ia32.cc | 
| diff --git a/src/ia32/builtins-ia32.cc b/src/ia32/builtins-ia32.cc | 
| index 785c5fd61c219e1d87555f21c0d084e4f9d3a7a6..61c3f23cb0a14079491cae93ae02e86e858bbc14 100644 | 
| --- a/src/ia32/builtins-ia32.cc | 
| +++ b/src/ia32/builtins-ia32.cc | 
| @@ -1252,6 +1252,33 @@ void Builtins::Generate_StringConstructCode(MacroAssembler* masm) { | 
| } | 
| +static void ArgumentsAdaptorStackCheck(MacroAssembler* masm, | 
| + Label* stack_overflow) { | 
| + // ----------- S t a t e ------------- | 
| + // -- eax : actual number of arguments | 
| + // -- ebx : expected number of arguments | 
| + // -- edi : function (passed through to callee) | 
| + // ----------------------------------- | 
| + // 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()); | 
| + __ mov(edx, Operand::StaticVariable(real_stack_limit)); | 
| + // Make ecx the space we have left. The stack might already be overflowed | 
| + // here which will cause ecx to become negative. | 
| + __ mov(ecx, esp); | 
| + __ sub(ecx, edx); | 
| + // Make edx the space we need for the array when it is unrolled onto the | 
| + // stack. | 
| + __ mov(edx, ebx); | 
| + __ shl(edx, kPointerSizeLog2); | 
| + // Check if the arguments will overflow the stack. | 
| + __ cmp(ecx, edx); | 
| + __ j(less_equal, stack_overflow); // Signed comparison. | 
| +} | 
| + | 
| + | 
| static void EnterArgumentsAdaptorFrame(MacroAssembler* masm) { | 
| __ push(ebp); | 
| __ mov(ebp, esp); | 
| @@ -1296,6 +1323,9 @@ void Builtins::Generate_ArgumentsAdaptorTrampoline(MacroAssembler* masm) { | 
| Label invoke, dont_adapt_arguments; | 
| __ IncrementCounter(masm->isolate()->counters()->arguments_adaptors(), 1); | 
| + Label stack_overflow; | 
| + ArgumentsAdaptorStackCheck(masm, &stack_overflow); | 
| + | 
| Label enough, too_few; | 
| __ mov(edx, FieldOperand(edi, JSFunction::kCodeEntryOffset)); | 
| __ cmp(eax, ebx); | 
| @@ -1370,6 +1400,10 @@ void Builtins::Generate_ArgumentsAdaptorTrampoline(MacroAssembler* masm) { | 
| // ------------------------------------------- | 
| __ bind(&dont_adapt_arguments); | 
| __ jmp(edx); | 
| + | 
| + __ bind(&stack_overflow); | 
| + EnterArgumentsAdaptorFrame(masm); | 
| + __ InvokeBuiltin(Builtins::STACK_OVERFLOW, JUMP_FUNCTION); | 
| 
Michael Starzinger
2014/04/08 11:58:40
The assumption is that this invocation never retur
 
ulan
2014/04/08 14:00:56
Done.
 | 
| } |