Patchable AllocateArray stub, like instance allocation stubs.

runtime/vm/stub_code.cc

 // Copyright (c) 2012, 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/stub_code.h"
 
 #include "platform/assert.h"
 #include "platform/globals.h"
 #include "vm/assembler.h"
 #include "vm/disassembler.h"
 #include "vm/flags.h"
+#include "vm/object_store.h"
 #include "vm/virtual_memory.h"
 #include "vm/visitor.h"
 
 namespace dart {
 
 DEFINE_FLAG(bool, disassemble_stubs, false, "Disassemble generated stubs.");
 
 #define STUB_CODE_DECLARE(name)                                                \
   StubEntry* StubCode::name##_entry_ = NULL;
 VM_STUB_CODE_LIST(STUB_CODE_DECLARE);
@@ skipping 38 matching lines @@
 void StubCode::GenerateFor(Isolate* init) {
   // Generate all the stubs.
   Code& code = Code::Handle();
   STUB_CODE_LIST(STUB_CODE_GENERATE);
 }
 
 #undef STUB_CODE_GENERATE
 
 
 void StubCode::Init(Isolate* isolate) {
-  StubCode* stubs = new StubCode();
+  StubCode* stubs = new StubCode(isolate);
   isolate->set_stub_code(stubs);
   stubs->GenerateFor(isolate);
 }
 
 
 void StubCode::VisitObjectPointers(ObjectPointerVisitor* visitor) {
   // The current isolate is needed as part of the macro.
   Isolate* isolate = Isolate::Current();
   StubCode* stubs = isolate->stub_code();
   if (stubs == NULL) return;
@@ skipping 22 matching lines @@
 }
 
 
 bool StubCode::InJumpToExceptionHandlerStub(uword pc) {
   uword entry = StubCode::JumpToExceptionHandlerEntryPoint();
   uword size = StubCode::JumpToExceptionHandlerSize();
   return (pc >= entry) && (pc < (entry + size));
 }
 
 
+RawCode* StubCode::GetAllocateArrayStub() {
+  const Class& array_cls = Class::Handle(isolate_,
+      isolate_->object_store()->array_class());
+  return GetAllocationStubForClass(array_cls);
+}
+
+
 RawCode* StubCode::GetAllocationStubForClass(const Class& cls) {
   Isolate* isolate = Isolate::Current();
   const Error& error = Error::Handle(isolate, cls.EnsureIsFinalized(isolate));
   ASSERT(error.IsNull());
   Code& stub = Code::Handle(isolate, cls.allocation_stub());
   if (stub.IsNull()) {
     Assembler assembler;
     const char* name = cls.ToCString();
     uword patch_code_offset = 0;
     uword entry_patch_offset = 0;
-    StubCode::GenerateAllocationStubForClass(
-        &assembler, cls, &entry_patch_offset, &patch_code_offset);
+    if (cls.id() == kArrayCid) {
+      StubCode::GeneratePatchableAllocateArrayStub(
+          &assembler, &entry_patch_offset, &patch_code_offset);
+    } else {
+      StubCode::GenerateAllocationStubForClass(
+          &assembler, cls, &entry_patch_offset, &patch_code_offset);
+    }
     stub ^= Code::FinalizeCode(name, &assembler);
     stub.set_owner(cls);
     cls.set_allocation_stub(stub);
     if (FLAG_disassemble_stubs) {
       OS::Print("Code for allocation stub '%s': {\n", name);
       DisassembleToStdout formatter;
       stub.Disassemble(&formatter);
       OS::Print("}\n");
     }
     stub.set_entry_patch_pc_offset(entry_patch_offset);
@@ skipping 48 matching lines @@
   Isolate* isolate = Isolate::Current();
   if ((isolate != NULL) && (isolate->stub_code() != NULL)) {
     STUB_CODE_LIST(STUB_CODE_TESTER);
   }
 #undef VM_STUB_CODE_TESTER
 #undef STUB_CODE_TESTER
   return NULL;
 }
 
 }  // namespace dart