Track live instance and allocation counts for classes

runtime/vm/assembler_ia32.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_IA32)
 
 #include "vm/assembler.h"
 #include "vm/code_generator.h"
 #include "vm/heap.h"
@@ skipping 2254 matching lines @@
   while (label->HasNear()) {
     intptr_t position = label->NearPosition();
     intptr_t offset = bound - (position + 1);
     ASSERT(Utils::IsInt(8, offset));
     buffer_.Store<int8_t>(position, offset);
   }
   label->BindTo(bound);
 }
 
 
+// Updates the allocation count for cid.
+void Assembler::BumpAllocationCount(Heap::Space space,
+                                    intptr_t cid,
+                                    Register temp_reg) {
+  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::Absolute(
+        class_heap_stats_table_address + class_offset + count_field_offset);
+    incl(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();
+    // temp_reg gets address of class table pointer.
+    movl(temp_reg, Address::Absolute(class_table->ClassStatsTableAddress()));
+    // Increment allocation count.
+    incl(Address(temp_reg, class_offset + count_field_offset));
+  }
+}
+
+
+void Assembler::BumpAllocationCount(Heap::Space space,
+                                    intptr_t cid,
+                                    Register size_reg,
+                                    Register temp_reg) {
+  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::Absolute(
+        class_heap_stats_table_address + class_offset + count_field_offset);
+    const Address& size_address = Address::Absolute(
+        class_heap_stats_table_address + class_offset + size_field_offset);
+    incl(count_address);
+    addl(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();
+    // temp_reg gets address of class table pointer.
+    movl(temp_reg, Address::Absolute(class_table->ClassStatsTableAddress()));
+    // Increment allocation count.
+    incl(Address(temp_reg, class_offset + count_field_offset));
+    addl(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 instance_reg,
+                            Register temp_reg) {
   ASSERT(failure != NULL);
   if (FLAG_inline_alloc) {
     Heap* heap = Isolate::Current()->heap();
     const intptr_t instance_size = cls.instance_size();
     movl(instance_reg, Address::Absolute(heap->TopAddress()));
     addl(instance_reg, Immediate(instance_size));
     // instance_reg: potential next object start.
     cmpl(instance_reg, Address::Absolute(heap->EndAddress()));
     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.
     movl(Address::Absolute(heap->TopAddress()), instance_reg);
+    BumpAllocationCount(Heap::kNew, cls.id(), temp_reg);
     ASSERT(instance_size >= kHeapObjectTag);
     subl(instance_reg, Immediate(instance_size - kHeapObjectTag));
     uword tags = 0;
     tags = RawObject::SizeTag::update(instance_size, tags);
     ASSERT(cls.id() != kIllegalCid);
     tags = RawObject::ClassIdTag::update(cls.id(), tags);
     movl(FieldAddress(instance_reg, Object::tags_offset()), Immediate(tags));
   } else {
     jmp(failure);
   }
@@ skipping 215 matching lines @@
 
 const char* Assembler::FpuRegisterName(FpuRegister reg) {
   ASSERT((0 <= reg) && (reg < kNumberOfXmmRegisters));
   return xmm_reg_names[reg];
 }
 
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_IA32