Make array allocation stub shared between isolates.

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"  // NOLINT
 #if defined(TARGET_ARCH_X64)
 
 #include "vm/assembler.h"
 #include "vm/cpu.h"
 #include "vm/heap.h"
@@ skipping 3167 matching lines @@
     pushq(TMP);  // Preserve TMP register.
     pushq(RDI);  // Preserve RDI register.
     if (fixed_length_encoding) {
       AssemblerBuffer::EnsureCapacity ensured(&buffer_);
       EmitRegisterREX(RDI, REX_W);
       EmitUint8(0xB8 | (RDI & 7));
       EmitInt64(message_address);
     } else {
       LoadImmediate(RDI, Immediate(message_address), PP);
     }
-    call(&Isolate::Current()->stub_code()->PrintStopMessageLabel());
+    call(&StubCode::PrintStopMessageLabel());
     popq(RDI);  // Restore RDI register.
     popq(TMP);  // Restore TMP register.
   } else {
     // Emit the lower half and the higher half of the message address as
     // immediate operands in the test rax instructions.
     testl(RAX, Immediate(Utils::Low32Bits(message_address)));
     testl(RAX, Immediate(Utils::High32Bits(message_address)));
   }
   // Emit the int3 instruction.
   int3();  // Execution can be resumed with the 'cont' command in gdb.
@@ skipping 234 matching lines @@
 
 void Assembler::LeaveStubFrame() {
   // Restore caller's PP register that was pushed in EnterStubFrame.
   movq(PP, Address(RBP, (kSavedCallerPpSlotFromFp * kWordSize)));
   LeaveFrame();
 }
 
 
 void Assembler::MaybeTraceAllocation(intptr_t cid,
                                      Label* trace,
-                                     bool near_jump) {
+                                     bool near_jump,
+                                     bool inline_isolate) {
   ASSERT(cid > 0);
-  intptr_t state_offset;
-  ClassTable* class_table = Isolate::Current()->class_table();
-  ClassHeapStats** table_ptr =
-      class_table->StateAddressFor(cid, &state_offset);
+  intptr_t state_offset = ClassTable::StateOffsetFor(cid);
   Register temp_reg = TMP;
-  if (cid < kNumPredefinedCids) {
-    movq(temp_reg, Immediate(reinterpret_cast<uword>(*table_ptr)));
+  if (inline_isolate) {
+    ClassTable* class_table = Isolate::Current()->class_table();
+    ClassHeapStats** table_ptr = class_table->TableAddressFor(cid);
+    if (cid < kNumPredefinedCids) {
+      movq(temp_reg, Immediate(reinterpret_cast<uword>(*table_ptr)));
+    } else {
+      movq(temp_reg, Immediate(reinterpret_cast<uword>(table_ptr)));
+      movq(temp_reg, Address(temp_reg, 0));
+    }
   } else {
-    Register temp_reg = TMP;
-    movq(temp_reg, Immediate(reinterpret_cast<uword>(table_ptr)));
-    movq(temp_reg, Address(temp_reg, 0));
+    LoadIsolate(temp_reg);
+    intptr_t table_offset =
+        Isolate::class_table_offset() + ClassTable::TableOffsetFor(cid);
+    movq(temp_reg, Address(temp_reg, table_offset));
   }
   testb(Address(temp_reg, state_offset),
         Immediate(ClassHeapStats::TraceAllocationMask()));
   // We are tracing for this class, jump to the trace label which will use
   // the allocation stub.
   j(NOT_ZERO, trace, near_jump);
 }
 
 
 void Assembler::UpdateAllocationStats(intptr_t cid,
@@ skipping 461 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