Support for dynamic write-barrier counters everywhere.

src/arm64/macro-assembler-arm64.cc

Index: src/arm64/macro-assembler-arm64.cc
diff --git a/src/arm64/macro-assembler-arm64.cc b/src/arm64/macro-assembler-arm64.cc
index 083f7747e8426bdd0db2c10e97fbe2c18d04b9ca..8626244a4d4c570bda76e13dc76630820f7d16ce 100644
--- a/src/arm64/macro-assembler-arm64.cc
+++ b/src/arm64/macro-assembler-arm64.cc
@@ -4428,10 +4428,6 @@ void MacroAssembler::RecordWriteForMap(Register object,
     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;
@@ -4459,6 +4455,11 @@ void MacroAssembler::RecordWriteForMap(Register object,
 
   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()) {
@@ -4494,10 +4495,6 @@ void MacroAssembler::RecordWrite(
     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;
@@ -4531,6 +4528,11 @@ void MacroAssembler::RecordWrite(
 
   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()) {