Debugger: make debug code on-stack replacement more robust.

src/arm64/full-codegen-arm64.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #if V8_TARGET_ARCH_ARM64
 
 #include "src/code-factory.h"
 #include "src/code-stubs.h"
@@ skipping 5050 matching lines @@
   switch (expr->yield_kind()) {
     case Yield::kSuspend:
       // Pop value from top-of-stack slot; box result into result register.
       EmitCreateIteratorResult(false);
       __ Push(result_register());
       // Fall through.
     case Yield::kInitial: {
       Label suspend, continuation, post_runtime, resume;
 
       __ B(&suspend);
-
       // TODO(jbramley): This label is bound here because the following code
       // looks at its pos(). Is it possible to do something more efficient here,
       // perhaps using Adr?
       __ Bind(&continuation);
+      __ RecordGeneratorContinuation();
       __ B(&resume);
 
       __ Bind(&suspend);
       VisitForAccumulatorValue(expr->generator_object());
       DCHECK((continuation.pos() > 0) && Smi::IsValid(continuation.pos()));
       __ Mov(x1, Smi::FromInt(continuation.pos()));
       __ Str(x1, FieldMemOperand(x0, JSGeneratorObject::kContinuationOffset));
       __ Str(cp, FieldMemOperand(x0, JSGeneratorObject::kContextOffset));
       __ Mov(x1, cp);
       __ RecordWriteField(x0, JSGeneratorObject::kContextOffset, x1, x2,
@@ skipping 50 matching lines @@
 
       // try { received = %yield result }
       // Shuffle the received result above a try handler and yield it without
       // re-boxing.
       __ Bind(&l_try);
       __ Pop(x0);                                        // result
       int handler_index = NewHandlerTableEntry();
       EnterTryBlock(handler_index, &l_catch);
       const int try_block_size = TryCatch::kElementCount * kPointerSize;
       __ Push(x0);                                       // result
+
       __ B(&l_suspend);
-
       // TODO(jbramley): This label is bound here because the following code
       // looks at its pos(). Is it possible to do something more efficient here,
       // perhaps using Adr?
       __ Bind(&l_continuation);
+      __ RecordGeneratorContinuation();
       __ B(&l_resume);
 
       __ Bind(&l_suspend);
       const int generator_object_depth = kPointerSize + try_block_size;
       __ Peek(x0, generator_object_depth);
       __ Push(x0);                                       // g
       __ Push(Smi::FromInt(handler_index));              // handler-index
       DCHECK((l_continuation.pos() > 0) && Smi::IsValid(l_continuation.pos()));
       __ Mov(x1, Smi::FromInt(l_continuation.pos()));
       __ Str(x1, FieldMemOperand(x0, JSGeneratorObject::kContinuationOffset));
@@ skipping 409 matching lines @@
   }
 
   return INTERRUPT;
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM64