Support compaction for code space pages.

src/x64/assembler-x64-inl.h

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 220 matching lines @@
 
 int RelocInfo::target_address_size() {
   if (IsCodedSpecially()) {
     return Assembler::kCallTargetSize;
   } else {
     return Assembler::kExternalTargetSize;
   }
 }
 
 
-void RelocInfo::set_target_address(Address target, Code* code) {
+void RelocInfo::set_target_address(Address target) {
   ASSERT(IsCodeTarget(rmode_) || rmode_ == RUNTIME_ENTRY);
   if (IsCodeTarget(rmode_)) {
     Assembler::set_target_address_at(pc_, target);
     Object* target_code = Code::GetCodeFromTargetAddress(target);
-    if (code != NULL) {
-      // TODO(1550) We are passing NULL as a slot because code can never be on
-      // evacuation candidate.
-      code->GetHeap()->incremental_marking()->RecordWrite(
-          code, NULL, HeapObject::cast(target_code));
+    if (host() != NULL) {
+      host()->GetHeap()->incremental_marking()->RecordWriteIntoCode(
+          host(), this, HeapObject::cast(target_code));
     }
   } else {
     Memory::Address_at(pc_) = target;
     CPU::FlushICache(pc_, sizeof(Address));
   }
 }
 
 
 Object* RelocInfo::target_object() {
   ASSERT(IsCodeTarget(rmode_) || rmode_ == EMBEDDED_OBJECT);
@@ skipping 16 matching lines @@
   return reinterpret_cast<Object**>(pc_);
 }
 
 
 Address* RelocInfo::target_reference_address() {
   ASSERT(rmode_ == RelocInfo::EXTERNAL_REFERENCE);
   return reinterpret_cast<Address*>(pc_);
 }
 
 
-void RelocInfo::set_target_object(Object* target, Code* code) {
+void RelocInfo::set_target_object(Object* target) {
   ASSERT(IsCodeTarget(rmode_) || rmode_ == EMBEDDED_OBJECT);
   Memory::Object_at(pc_) = target;
   CPU::FlushICache(pc_, sizeof(Address));
-  if (code != NULL && target->IsHeapObject()) {
-    code->GetHeap()->incremental_marking()->RecordWrite(
-        code, &Memory::Object_at(pc_), HeapObject::cast(target));
+  if (host() != NULL && target->IsHeapObject()) {
+    host()->GetHeap()->incremental_marking()->RecordWrite(
+        host(), &Memory::Object_at(pc_), HeapObject::cast(target));
   }
 }
 
 
 Handle<JSGlobalPropertyCell> RelocInfo::target_cell_handle() {
   ASSERT(rmode_ == RelocInfo::GLOBAL_PROPERTY_CELL);
   Address address = Memory::Address_at(pc_);
   return Handle<JSGlobalPropertyCell>(
       reinterpret_cast<JSGlobalPropertyCell**>(address));
 }
 
 
 JSGlobalPropertyCell* RelocInfo::target_cell() {
   ASSERT(rmode_ == RelocInfo::GLOBAL_PROPERTY_CELL);
   Address address = Memory::Address_at(pc_);
   Object* object = HeapObject::FromAddress(
       address - JSGlobalPropertyCell::kValueOffset);
   return reinterpret_cast<JSGlobalPropertyCell*>(object);
 }
 
 
-void RelocInfo::set_target_cell(JSGlobalPropertyCell* cell, Code* code) {
+void RelocInfo::set_target_cell(JSGlobalPropertyCell* cell) {
   ASSERT(rmode_ == RelocInfo::GLOBAL_PROPERTY_CELL);
   Address address = cell->address() + JSGlobalPropertyCell::kValueOffset;
   Memory::Address_at(pc_) = address;
   CPU::FlushICache(pc_, sizeof(Address));
-  if (code != NULL) {
-    code->GetHeap()->incremental_marking()->RecordWrite(
-        code, &Memory::Object_at(pc_), cell);
+  if (host() != NULL) {
+    // TODO(1550) We are passing NULL as a slot because cell can never be on
+    // evacuation candidate.
+    host()->GetHeap()->incremental_marking()->RecordWrite(
+        host(), NULL, cell);
   }
 }
 
 
 bool RelocInfo::IsPatchedReturnSequence() {
   // The recognized call sequence is:
   //  movq(kScratchRegister, immediate64); call(kScratchRegister);
   // It only needs to be distinguished from a return sequence
   //  movq(rsp, rbp); pop(rbp); ret(n); int3 *6
   // The 11th byte is int3 (0xCC) in the return sequence and
@@ skipping 19 matching lines @@
 }
 
 
 void RelocInfo::set_call_address(Address target) {
   ASSERT((IsJSReturn(rmode()) && IsPatchedReturnSequence()) ||
          (IsDebugBreakSlot(rmode()) && IsPatchedDebugBreakSlotSequence()));
   Memory::Address_at(pc_ + Assembler::kRealPatchReturnSequenceAddressOffset) =
       target;
   CPU::FlushICache(pc_ + Assembler::kRealPatchReturnSequenceAddressOffset,
                    sizeof(Address));
+  if (host() != NULL) {
+    Object* target_code = Code::GetCodeFromTargetAddress(target);
+    host()->GetHeap()->incremental_marking()->RecordWriteIntoCode(
+        host(), this, HeapObject::cast(target_code));
+  }
 }
 
 
 Object* RelocInfo::call_object() {
   return *call_object_address();
 }
 
 
 void RelocInfo::set_call_object(Object* target) {
   *call_object_address() = target;
@@ skipping 96 matching lines @@
   ASSERT(len_ == 1 || len_ == 2);
   int32_t* p = reinterpret_cast<int32_t*>(&buf_[len_]);
   *p = disp;
   len_ += sizeof(int32_t);
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_X64_ASSEMBLER_X64_INL_H_