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

src/ppc/full-codegen-ppc.cc

 // Copyright 2014 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_PPC
 
 #include "src/code-factory.h"
 #include "src/code-stubs.h"
@@ skipping 2119 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);
-
       __ bind(&continuation);
+      __ RecordGeneratorContinuation();
       __ b(&resume);
 
       __ bind(&suspend);
       VisitForAccumulatorValue(expr->generator_object());
       DCHECK(continuation.pos() > 0 && Smi::IsValid(continuation.pos()));
       __ LoadSmiLiteral(r4, Smi::FromInt(continuation.pos()));
       __ StoreP(r4, FieldMemOperand(r3, JSGeneratorObject::kContinuationOffset),
                 r0);
       __ StoreP(cp, FieldMemOperand(r3, JSGeneratorObject::kContextOffset), r0);
       __ mr(r4, cp);
@@ skipping 52 matching lines @@
 
       // try { received = %yield result }
       // Shuffle the received result above a try handler and yield it without
       // re-boxing.
       __ bind(&l_try);
       __ pop(r3);  // result
       int handler_index = NewHandlerTableEntry();
       EnterTryBlock(handler_index, &l_catch);
       const int try_block_size = TryCatch::kElementCount * kPointerSize;
       __ push(r3);  // result
+
       __ b(&l_suspend);
       __ bind(&l_continuation);
+      __ RecordGeneratorContinuation();
       __ b(&l_resume);
+
       __ bind(&l_suspend);
       const int generator_object_depth = kPointerSize + try_block_size;
       __ LoadP(r3, MemOperand(sp, generator_object_depth));
       __ push(r3);  // g
       __ Push(Smi::FromInt(handler_index));  // handler-index
       DCHECK(l_continuation.pos() > 0 && Smi::IsValid(l_continuation.pos()));
       __ LoadSmiLiteral(r4, Smi::FromInt(l_continuation.pos()));
       __ StoreP(r4, FieldMemOperand(r3, JSGeneratorObject::kContinuationOffset),
                 r0);
       __ StoreP(cp, FieldMemOperand(r3, JSGeneratorObject::kContextOffset), r0);
@@ skipping 3353 matching lines @@
     return ON_STACK_REPLACEMENT;
   }
 
   DCHECK(interrupt_address ==
          isolate->builtins()->OsrAfterStackCheck()->entry());
   return OSR_AFTER_STACK_CHECK;
 }
 }  // namespace internal
 }  // namespace v8
 #endif  // V8_TARGET_ARCH_PPC