Support for dynamic write-barrier counters everywhere.

src/arm64/macro-assembler-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/bootstrapper.h"
 #include "src/codegen.h"
@@ skipping 4410 matching lines @@
 
   if (emit_debug_code()) {
     UseScratchRegisterScope temps(this);
     Register temp = temps.AcquireX();
 
     Ldr(temp, FieldMemOperand(object, HeapObject::kMapOffset));
     Cmp(temp, map);
     Check(eq, kWrongAddressOrValuePassedToRecordWrite);
   }
 
-  // Count number of write barriers in generated code.
-  isolate()->counters()->write_barriers_static()->Increment();
-  // TODO(mstarzinger): Dynamic counter missing.
-
   // First, check if a write barrier is even needed. The tests below
   // catch stores of smis and stores into the young generation.
   Label done;
 
   // A single check of the map's pages interesting flag suffices, since it is
   // only set during incremental collection, and then it's also guaranteed that
   // the from object's page's interesting flag is also set.  This optimization
   // relies on the fact that maps can never be in new space.
   CheckPageFlagClear(map,
                      map,  // Used as scratch.
                      MemoryChunk::kPointersToHereAreInterestingMask,
                      &done);
 
   // Record the actual write.
   if (lr_status == kLRHasNotBeenSaved) {
     Push(lr);
   }
   Add(dst, object, HeapObject::kMapOffset - kHeapObjectTag);
   RecordWriteStub stub(isolate(), object, map, dst, OMIT_REMEMBERED_SET,
                        fp_mode);
   CallStub(&stub);
   if (lr_status == kLRHasNotBeenSaved) {
     Pop(lr);
   }
 
   Bind(&done);
 
+  // Count number of write barriers in generated code.
+  isolate()->counters()->write_barriers_static()->Increment();
+  IncrementCounter(isolate()->counters()->write_barriers_dynamic(), 1, map,
+                   dst);
+
   // Clobber clobbered registers when running with the debug-code flag
   // turned on to provoke errors.
   if (emit_debug_code()) {
     Mov(dst, Operand(BitCast<int64_t>(kZapValue + 12)));
     Mov(map, Operand(BitCast<int64_t>(kZapValue + 16)));
   }
 }
 
 
 // Will clobber: object, address, value.
@@ skipping 15 matching lines @@
 
   if (emit_debug_code()) {
     UseScratchRegisterScope temps(this);
     Register temp = temps.AcquireX();
 
     Ldr(temp, MemOperand(address));
     Cmp(temp, value);
     Check(eq, kWrongAddressOrValuePassedToRecordWrite);
   }
 
-  // Count number of write barriers in generated code.
-  isolate()->counters()->write_barriers_static()->Increment();
-  // TODO(mstarzinger): Dynamic counter missing.
-
   // First, check if a write barrier is even needed. The tests below
   // catch stores of smis and stores into the young generation.
   Label done;
 
   if (smi_check == INLINE_SMI_CHECK) {
     ASSERT_EQ(0, kSmiTag);
     JumpIfSmi(value, &done);
   }
 
   if (pointers_to_here_check_for_value != kPointersToHereAreAlwaysInteresting) {
@@ skipping 13 matching lines @@
   }
   RecordWriteStub stub(isolate(), object, value, address, remembered_set_action,
                        fp_mode);
   CallStub(&stub);
   if (lr_status == kLRHasNotBeenSaved) {
     Pop(lr);
   }
 
   Bind(&done);
 
+  // Count number of write barriers in generated code.
+  isolate()->counters()->write_barriers_static()->Increment();
+  IncrementCounter(isolate()->counters()->write_barriers_dynamic(), 1, address,
+                   value);
+
   // Clobber clobbered registers when running with the debug-code flag
   // turned on to provoke errors.
   if (emit_debug_code()) {
     Mov(address, Operand(BitCast<int64_t>(kZapValue + 12)));
     Mov(value, Operand(BitCast<int64_t>(kZapValue + 16)));
   }
 }
 
 
 void MacroAssembler::AssertHasValidColor(const Register& reg) {
@@ skipping 829 matching lines @@
   }
 }
 
 
 #undef __
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM64