JIT precompilated snapshots.

runtime/vm/raw_object.h

 // 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.
 
 #ifndef VM_RAW_OBJECT_H_
 #define VM_RAW_OBJECT_H_
 
 #include "platform/assert.h"
 #include "vm/atomic.h"
 #include "vm/globals.h"
@@ skipping 703 matching lines @@
     return reinterpret_cast<RawObject**>(&ptr()->dependent_code_);
   }
   RawObject** to_snapshot(Snapshot::Kind kind) {
     switch (kind) {
       case Snapshot::kCore:
       case Snapshot::kScript:
       case Snapshot::kAppWithJIT:
       case Snapshot::kAppNoJIT:
         return reinterpret_cast<RawObject**>(&ptr()->direct_subclasses_);
       case Snapshot::kMessage:
+      case Snapshot::kNone:
         break;
     }
     UNREACHABLE();
     return NULL;
   }
 
   cpp_vtable handle_vtable_;
   TokenPosition token_pos_;
   int32_t instance_size_in_words_;  // Size if fixed len or 0 if variable len.
   int32_t type_arguments_field_offset_in_words_;  // Offset of type args fld.
@@ skipping 208 matching lines @@
   }
   RawObject** to_snapshot(Snapshot::Kind kind) {
     switch (kind) {
       case Snapshot::kCore:
       case Snapshot::kScript:
       case Snapshot::kAppWithJIT:
         return reinterpret_cast<RawObject**>(&ptr()->guarded_list_length_);
       case Snapshot::kAppNoJIT:
         return reinterpret_cast<RawObject**>(&ptr()->initializer_);
       case Snapshot::kMessage:
+      case Snapshot::kNone:
         break;
     }
     UNREACHABLE();
     return NULL;
   }
 
   TokenPosition token_pos_;
   classid_t guarded_cid_;
   classid_t is_nullable_;  // kNullCid if field can contain null value and
                            // any other value otherwise.
@@ skipping 60 matching lines @@
   RawObject** to() { return reinterpret_cast<RawObject**>(&ptr()->source_); }
   RawObject** to_snapshot(Snapshot::Kind kind) {
     switch (kind) {
       case Snapshot::kAppNoJIT:
         return reinterpret_cast<RawObject**>(&ptr()->url_);
       case Snapshot::kCore:
       case Snapshot::kAppWithJIT:
       case Snapshot::kScript:
         return reinterpret_cast<RawObject**>(&ptr()->tokens_);
       case Snapshot::kMessage:
+      case Snapshot::kNone:
         break;
     }
     UNREACHABLE();
     return NULL;
   }
 
   int32_t line_offset_;
   int32_t col_offset_;
   int8_t kind_;  // Of type Kind.
 };
@@ skipping 71 matching lines @@
     kInlinedCallerIdMapIndex = 2,
     kInlinedIdToTokenPosIndex = 3,
     kInlinedMetadataSize = 4,
   };
 
   RAW_HEAP_OBJECT_IMPLEMENTATION(Code);
 
   uword entry_point_;
 
   RawObject** from() {
-    return reinterpret_cast<RawObject**>(&ptr()->instructions_);
+    return reinterpret_cast<RawObject**>(&ptr()->active_instructions_);
   }
-  union {
-    RawInstructions* instructions_;
-    RawSmi* precompiled_instructions_size_;
-  };
+  RawInstructions* active_instructions_;
+  RawInstructions* instructions_;
   RawObjectPool* object_pool_;
   // If owner_ is Function::null() the owner is a regular stub.
   // If owner_ is a Class the owner is the allocation stub for that class.
   // Else, owner_ is a regular Dart Function.
   RawObject* owner_;  // Function, Null, or a Class.
   RawExceptionHandlers* exception_handlers_;
   RawPcDescriptors* pc_descriptors_;
   RawCodeSourceMap* code_source_map_;
   RawArray* stackmaps_;
   RawObject** to_snapshot() {
@@ skipping 371 matching lines @@
   }
   RawObject** to_snapshot(Snapshot::Kind kind) {
     switch (kind) {
       case Snapshot::kAppNoJIT:
         return reinterpret_cast<RawObject**>(&ptr()->args_descriptor_);
       case Snapshot::kCore:
       case Snapshot::kScript:
       case Snapshot::kAppWithJIT:
         return to();
       case Snapshot::kMessage:
+      case Snapshot::kNone:
         break;
     }
     UNREACHABLE();
     return NULL;
   }
   int32_t deopt_id_;     // Deoptimization id corresponding to this IC.
   uint32_t state_bits_;  // Number of arguments tested in IC, deopt reasons,
                          // range feedback.
 #if defined(TAG_IC_DATA)
   intptr_t tag_;  // Debugging, verifying that the icdata is assigned to the
@@ skipping 111 matching lines @@
   }
   RawObject** to_snapshot(Snapshot::Kind kind) {
     switch (kind) {
       case Snapshot::kCore:
       case Snapshot::kScript:
       case Snapshot::kAppWithJIT:
         return reinterpret_cast<RawObject**>(&ptr()->imports_);
       case Snapshot::kAppNoJIT:
         return reinterpret_cast<RawObject**>(&ptr()->importer_);
       case Snapshot::kMessage:
+      case Snapshot::kNone:
         break;
     }
     UNREACHABLE();
     return NULL;
   }
   uint16_t num_imports_;          // Number of library entries in libraries_.
   bool is_deferred_load_;
   bool is_loaded_;
 };
 
@@ skipping 768 matching lines @@
   COMPILE_ASSERT(kExternalTypedDataInt8ArrayCid ==
                  kTypedDataInt8ArrayViewCid + 15);
   COMPILE_ASSERT(kByteBufferCid == kExternalTypedDataInt8ArrayCid + 14);
   COMPILE_ASSERT(kNullCid == kByteBufferCid + 1);
   return (kNullCid - kTypedDataInt8ArrayCid);
 }
 
 }  // namespace dart
 
 #endif  // VM_RAW_OBJECT_H_