Add asserts and state tracking to ensure that we do not call

src/x64/debug-x64.cc

 // Copyright 2011 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 82 matching lines @@
 
 
 #define __ ACCESS_MASM(masm)
 
 
 static void Generate_DebugBreakCallHelper(MacroAssembler* masm,
                                           RegList object_regs,
                                           RegList non_object_regs,
                                           bool convert_call_to_jmp) {
   // Enter an internal frame.
-  __ EnterInternalFrame();
+{
+  FrameScope scope(masm, StackFrame::INTERNAL);
 
   // Store the registers containing live values on the expression stack to
   // make sure that these are correctly updated during GC. Non object values
   // are stored as as two smis causing it to be untouched by GC.
   ASSERT((object_regs & ~kJSCallerSaved) == 0);
   ASSERT((non_object_regs & ~kJSCallerSaved) == 0);
   ASSERT((object_regs & non_object_regs) == 0);
   for (int i = 0; i < kNumJSCallerSaved; i++) {
     int r = JSCallerSavedCode(i);
     Register reg = { r };
@@ skipping 36 matching lines @@
       __ pop(kScratchRegister);
       __ SmiToInteger32(kScratchRegister, kScratchRegister);
       __ shl(kScratchRegister, Immediate(32));
       __ pop(reg);
       __ SmiToInteger32(reg, reg);
       __ or_(reg, kScratchRegister);
     }
   }
 
   // Get rid of the internal frame.
-  __ LeaveInternalFrame();
+}
 
   // If this call did not replace a call but patched other code then there will
   // be an unwanted return address left on the stack. Here we get rid of that.
   if (convert_call_to_jmp) {
     __ addq(rsp, Immediate(kPointerSize));
   }
 
   // Now that the break point has been handled, resume normal execution by
   // jumping to the target address intended by the caller and that was
   // overwritten by the address of DebugBreakXXX.
@@ skipping 139 matching lines @@
 
 const bool Debug::kFrameDropperSupported = true;
 
 #undef __
 
 #endif  // ENABLE_DEBUGGER_SUPPORT
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64