Skip built-in and debugger functions when DebugBreak is forced

src/ia32/regexp-macro-assembler-ia32.cc

 // Copyright 2008-2009 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 616 matching lines @@
   __ push(ebp);
   __ mov(ebp, esp);
   // Save callee-save registers. Order here should correspond to order of
   // kBackup_ebx etc.
   __ push(esi);
   __ push(edi);
   __ push(ebx);  // Callee-save on MacOS.
   __ push(Immediate(0));  // Make room for "input start - 1" constant.
 
   // Check if we have space on the stack for registers.
-  Label retry_stack_check;
   Label stack_limit_hit;
   Label stack_ok;
 
-  __ bind(&retry_stack_check);
   ExternalReference stack_guard_limit =
       ExternalReference::address_of_stack_guard_limit();
   __ mov(ecx, esp);
   __ sub(ecx, Operand::StaticVariable(stack_guard_limit));
   // Handle it if the stack pointer is already below the stack limit.
   __ j(below_equal, &stack_limit_hit, not_taken);
   // Check if there is room for the variable number of registers above
   // the stack limit.
   __ cmp(ecx, num_registers_ * kPointerSize);
   __ j(above_equal, &stack_ok, taken);
   // Exit with OutOfMemory exception. There is not enough space on the stack
   // for our working registers.
   __ mov(eax, EXCEPTION);
   __ jmp(&exit_label_);
 
   __ bind(&stack_limit_hit);
   CallCheckStackGuardState(ebx);
   __ or_(eax, Operand(eax));
   // If returned value is non-zero, we exit with the returned value as result.
-  // Otherwise it was a preemption and we just check the limit again.
-  __ j(equal, &retry_stack_check);
-  // Return value was non-zero. Exit with exception or retry.
-  __ jmp(&exit_label_);
+  __ j(not_zero, &exit_label_);
 
   __ bind(&stack_ok);
 
   // Allocate space on stack for registers.
   __ sub(Operand(esp), Immediate(num_registers_ * kPointerSize));
   // Load string length.
   __ mov(esi, Operand(ebp, kInputEnd));
   // Load input position.
   __ mov(edi, Operand(ebp, kInputStart));
   // Set up edi to be negative offset from string end.
@@ skipping 80 matching lines @@
 
   Label exit_with_exception;
 
   // Preempt-code
   if (check_preempt_label_.is_linked()) {
     __ bind(&check_preempt_label_);
 
     __ push(backtrack_stackpointer());
     __ push(edi);
 
-    Label retry;
-
-    __ bind(&retry);
     CallCheckStackGuardState(ebx);
     __ or_(eax, Operand(eax));
     // If returning non-zero, we should end execution with the given
     // result as return value.
     __ j(not_zero, &exit_label_);
-    // Check if we are still preempted.
-    ExternalReference stack_guard_limit =
-        ExternalReference::address_of_stack_guard_limit();
-    __ cmp(esp, Operand::StaticVariable(stack_guard_limit));
-    __ j(below_equal, &retry);
 
     __ pop(edi);
     __ pop(backtrack_stackpointer());
     // String might have moved: Reload esi from frame.
     __ mov(esi, Operand(ebp, kInputEnd));
     SafeReturn();
   }
 
   // Backtrack stack overflow code.
   if (stack_overflow_label_.is_linked()) {
@@ skipping 597 matching lines @@
 
 
 void RegExpMacroAssemblerIA32::LoadConstantBufferAddress(Register reg,
                                                          ArraySlice* buffer) {
   __ mov(reg, buffer->array());
   __ add(Operand(reg), Immediate(buffer->base_offset()));
 }
 
 #undef __
 }}  // namespace v8::internal