[debugger] omit exception events for rethrown exceptions in async.

src/full-codegen/mips/full-codegen-mips.cc

 // Copyright 2012 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.
 
 #if V8_TARGET_ARCH_MIPS
 
 // Note on Mips implementation:
 //
 // The result_register() for mips is the 'v0' register, which is defined
 // by the ABI to contain function return values. However, the first
@@ skipping 1808 matching lines @@
   __ lw(a1, FieldMemOperand(v0, JSGeneratorObject::kResumeModeOffset));
   __ lw(v0, FieldMemOperand(v0, JSGeneratorObject::kInputOrDebugPosOffset));
   __ Branch(&resume, eq, a1, Operand(Smi::FromInt(JSGeneratorObject::kNext)));
   __ Push(result_register());
   __ Branch(&exception, eq, a1,
             Operand(Smi::FromInt(JSGeneratorObject::kThrow)));
   EmitCreateIteratorResult(true);
   EmitUnwindAndReturn();
 
   __ bind(&exception);
-  __ CallRuntime(Runtime::kThrow);
+  __ CallRuntime(expr->rethrow_on_exception() ? Runtime::kReThrow
+                                              : Runtime::kThrow);
 
   __ bind(&suspend);
   OperandStackDepthIncrement(1);  // Not popped on this path.
   VisitForAccumulatorValue(expr->generator_object());
   DCHECK(continuation.pos() > 0 && Smi::IsValid(continuation.pos()));
   __ li(a1, Operand(Smi::FromInt(continuation.pos())));
   __ sw(a1, FieldMemOperand(v0, JSGeneratorObject::kContinuationOffset));
   __ sw(cp, FieldMemOperand(v0, JSGeneratorObject::kContextOffset));
   __ mov(a1, cp);
   __ RecordWriteField(v0, JSGeneratorObject::kContextOffset, a1, a2,
@@ skipping 1940 matching lines @@
          reinterpret_cast<uint32_t>(
              isolate->builtins()->OnStackReplacement()->entry()));
   return ON_STACK_REPLACEMENT;
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_MIPS