Track live instance and allocation counts for classes

runtime/vm/assembler_x64.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"
 #if defined(TARGET_ARCH_X64)
 
 #include "vm/assembler.h"
 #include "vm/heap.h"
 #include "vm/memory_region.h"
@@ skipping 2862 matching lines @@
 }
 
 
 void Assembler::LeaveStubFrame() {
   // Restore caller's PP register that was pushed in EnterStubFrame.
   movq(PP, Address(RBP, (kSavedCallerPpSlotFromFp * kWordSize)));
   LeaveFrame();
 }
 
 
+void Assembler::BumpAllocationCount(Heap::Space space,
+                                    intptr_t cid) {
+  Register temp_reg = TMP;
+  ASSERT(cid > 0);
+  Isolate* isolate = Isolate::Current();
+  ClassTable* class_table = isolate->class_table();
+  if (cid < kNumPredefinedCids) {
+    const uword class_heap_stats_table_address =
+        class_table->PredefinedClassHeapStatsTableAddress();
+    const uword class_offset = cid * sizeof(ClassHeapStats);  // NOLINT
+    const uword count_field_offset = space == Heap::kNew ?
+      ClassHeapStats::new_count_since_gc_new_space_offset() :
+      ClassHeapStats::new_count_since_gc_old_space_offset();
+    const Address& count_address = Address(temp_reg, count_field_offset);
+    movq(temp_reg, Immediate(class_heap_stats_table_address + class_offset));
+    incq(count_address);
+  } else {
+    ASSERT(temp_reg != kNoRegister);
+    const uword class_offset = cid * sizeof(ClassHeapStats);  // NOLINT
+    const uword count_field_offset = space == Heap::kNew ?
+      ClassHeapStats::new_count_since_gc_new_space_offset() :
+      ClassHeapStats::new_count_since_gc_old_space_offset();
+    movq(temp_reg, Immediate(class_table->ClassStatsTableAddress()));
+    movq(temp_reg, Address(temp_reg, 0));
+    incq(Address(temp_reg, class_offset + count_field_offset));
+  }
+}
+
+
+void Assembler::BumpAllocationCount(Heap::Space space,
+                                    intptr_t cid,
+                                    Register size_reg) {
+  Register temp_reg = TMP;
+  ASSERT(cid > 0);
+  Isolate* isolate = Isolate::Current();
+  ClassTable* class_table = isolate->class_table();
+  if (cid < kNumPredefinedCids) {
+    const uword class_heap_stats_table_address =
+        class_table->PredefinedClassHeapStatsTableAddress();
+    const uword class_offset = cid * sizeof(ClassHeapStats);  // NOLINT
+    const uword count_field_offset = space == Heap::kNew ?
+      ClassHeapStats::new_count_since_gc_new_space_offset() :
+      ClassHeapStats::new_count_since_gc_old_space_offset();
+    const uword size_field_offset = space == Heap::kNew ?
+      ClassHeapStats::new_size_since_gc_new_space_offset() :
+      ClassHeapStats::new_size_since_gc_old_space_offset();
+    const Address& count_address = Address(temp_reg, count_field_offset);
+    const Address& size_address = Address(temp_reg, size_field_offset);
+    movq(temp_reg, Immediate(class_heap_stats_table_address + class_offset));
+    incq(count_address);
+    addq(size_address, size_reg);
+  } else {
+    ASSERT(temp_reg != kNoRegister);
+    const uword class_offset = cid * sizeof(ClassHeapStats);  // NOLINT
+    const uword count_field_offset = space == Heap::kNew ?
+      ClassHeapStats::new_count_since_gc_new_space_offset() :
+      ClassHeapStats::new_count_since_gc_old_space_offset();
+    const uword size_field_offset = space == Heap::kNew ?
+      ClassHeapStats::new_size_since_gc_new_space_offset() :
+      ClassHeapStats::new_size_since_gc_old_space_offset();
+    movq(temp_reg, Immediate(class_table->ClassStatsTableAddress()));
+    movq(temp_reg, Address(temp_reg, 0));
+    incq(Address(temp_reg, class_offset + count_field_offset));
+    addq(Address(temp_reg, class_offset + size_field_offset), size_reg);
+  }
+}
+
+
 void Assembler::TryAllocate(const Class& cls,
                             Label* failure,
                             bool near_jump,
                             Register instance_reg,
                             Register pp) {
   ASSERT(failure != NULL);
   if (FLAG_inline_alloc) {
     Heap* heap = Isolate::Current()->heap();
     const intptr_t instance_size = cls.instance_size();
     LoadImmediate(TMP, Immediate(heap->TopAddress()), pp);
     movq(instance_reg, Address(TMP, 0));
     AddImmediate(instance_reg, Immediate(instance_size), pp);
     // instance_reg: potential next object start.
     LoadImmediate(TMP, Immediate(heap->EndAddress()), pp);
     cmpq(instance_reg, Address(TMP, 0));
     j(ABOVE_EQUAL, failure, near_jump);
     // Successfully allocated the object, now update top to point to
     // next object start and store the class in the class field of object.
     LoadImmediate(TMP, Immediate(heap->TopAddress()), pp);
     movq(Address(TMP, 0), instance_reg);
+    BumpAllocationCount(Heap::kNew, cls.id());
     ASSERT(instance_size >= kHeapObjectTag);
     AddImmediate(instance_reg, Immediate(kHeapObjectTag - instance_size), pp);
     uword tags = 0;
     tags = RawObject::SizeTag::update(instance_size, tags);
     ASSERT(cls.id() != kIllegalCid);
     tags = RawObject::ClassIdTag::update(cls.id(), tags);
     LoadImmediate(FieldAddress(instance_reg, Object::tags_offset()),
                   Immediate(tags), pp);
   } else {
     jmp(failure);
@@ skipping 187 matching lines @@
 
 
 const char* Assembler::FpuRegisterName(FpuRegister reg) {
   ASSERT((0 <= reg) && (reg < kNumberOfXmmRegisters));
   return xmm_reg_names[reg];
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_X64