Precompilation: don't include an object header for instructions in the text section.

runtime/vm/snapshot.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_SNAPSHOT_H_
 #define VM_SNAPSHOT_H_
 
 #include "platform/assert.h"
 #include "vm/allocation.h"
 #include "vm/bitfield.h"
@@ skipping 352 matching lines @@
   InstructionsReader(const uint8_t* instructions_buffer,
                      const uint8_t* data_buffer)
     : instructions_buffer_(instructions_buffer),
       data_buffer_(data_buffer) {
     ASSERT(instructions_buffer != NULL);
     ASSERT(data_buffer != NULL);
     ASSERT(Utils::IsAligned(reinterpret_cast<uword>(instructions_buffer),
                             OS::PreferredCodeAlignment()));
   }
 
-  RawInstructions* GetInstructionsAt(int32_t offset, uword expected_tags);
+  uword GetInstructionsAt(int32_t offset);
   RawObject* GetObjectAt(int32_t offset);
 
  private:
   const uint8_t* instructions_buffer_;
   const uint8_t* data_buffer_;
 
   DISALLOW_COPY_AND_ASSIGN(InstructionsReader);
 };
 
 
@@ skipping 92 matching lines @@
   RawInt32x4* NewInt32x4(uint32_t v0, uint32_t v1, uint32_t v2, uint32_t v3);
   RawFloat64x2* NewFloat64x2(double v0, double v1);
   RawApiError* NewApiError();
   RawLanguageError* NewLanguageError();
   RawUnhandledException* NewUnhandledException();
   RawObject* NewInteger(int64_t value);
   RawStacktrace* NewStacktrace();
   RawWeakProperty* NewWeakProperty();
   RawRegExp* NewRegExp();
 
-  RawInstructions* GetInstructionsAt(int32_t offset, uword expected_tags) {
-    return instructions_reader_->GetInstructionsAt(offset, expected_tags);
+  uword GetInstructionsAt(int32_t offset) {
+    return instructions_reader_->GetInstructionsAt(offset);
   }
 
   RawObject* GetObjectAt(int32_t offset) {
     return instructions_reader_->GetObjectAt(offset);
   }
 
   const uint8_t* instructions_buffer_;
   const uint8_t* data_buffer_;
 
  protected:
@@ skipping 357 matching lines @@
       objects_() {
     ASSERT(buffer != NULL);
     ASSERT(alloc != NULL);
   }
 
   // Size of the snapshot (assembly code).
   intptr_t BytesWritten() const { return stream_.bytes_written(); }
 
   intptr_t binary_size() { return binary_size_; }
 
-  int32_t GetOffsetFor(RawInstructions* instructions);
+  int32_t GetOffsetFor(RawInstructions* instructions, RawCode* code);
 
   int32_t GetObjectOffsetFor(RawObject* raw_object);
 
-  void SetInstructionsCode(RawInstructions* insns, RawCode* code) {
-    for (intptr_t i = 0; i < instructions_.length(); i++) {
-      if (instructions_[i].raw_insns_ == insns) {
-        instructions_[i].raw_code_ = code;
-        return;
-      }
-    }
-    UNREACHABLE();
-  }
-
   void WriteAssembly();
 
  private:
   struct InstructionsData {
-    explicit InstructionsData(RawInstructions* insns)
-        : raw_insns_(insns), raw_code_(NULL) { }
+    explicit InstructionsData(RawInstructions* insns,
+                              RawCode* code,
+                              intptr_t offset)
+        : raw_insns_(insns), raw_code_(code), offset_(offset) { }
 
     union {
       RawInstructions* raw_insns_;
       const Instructions* insns_;
     };
     union {
       RawCode* raw_code_;
       const Code* code_;
     };
+    intptr_t offset_;
   };
 
   struct ObjectData {
     explicit ObjectData(RawObject* raw_obj)
         : raw_obj_(raw_obj) { }
 
     union {
       RawObject* raw_obj_;
       const Object* obj_;
     };
@@ skipping 59 matching lines @@
   bool can_send_any_object() const { return can_send_any_object_; }
   bool snapshot_code() const { return snapshot_code_; }
   bool vm_isolate_is_symbolic() const { return vm_isolate_is_symbolic_; }
   void ThrowException(Exceptions::ExceptionType type, const char* msg);
 
   // Write a version string for the snapshot.
   void WriteVersion();
 
   static intptr_t FirstObjectId();
 
-  int32_t GetInstructionsId(RawInstructions* instructions) {
-    return instructions_writer_->GetOffsetFor(instructions);
+  int32_t GetInstructionsId(RawInstructions* instructions, RawCode* code) {
+    return instructions_writer_->GetOffsetFor(instructions, code);
   }
 
   int32_t GetObjectId(RawObject* raw) {
     return instructions_writer_->GetObjectOffsetFor(raw);
   }
 
-  void SetInstructionsCode(RawInstructions* instructions, RawCode* code) {
-    return instructions_writer_->SetInstructionsCode(instructions, code);
-  }
-
   void WriteFunctionId(RawFunction* func, bool owner_is_class);
 
   RawFunction* IsSerializableClosure(RawClosure* closure);
 
   void WriteStaticImplicitClosure(intptr_t object_id,
                                   RawFunction* func,
                                   intptr_t tags);
 
  protected:
   bool CheckAndWritePredefinedObject(RawObject* raw);
@@ skipping 46 matching lines @@
   const char* exception_msg_;  // Message associated with exception.
   bool unmarked_objects_;  // True if marked objects have been unmarked.
   bool can_send_any_object_;  // True if any Dart instance can be sent.
   bool snapshot_code_;
   bool vm_isolate_is_symbolic_;
 
   friend class FullSnapshotWriter;
   friend class RawArray;
   friend class RawClass;
   friend class RawClosureData;
+  friend class RawCode;
   friend class RawContextScope;
   friend class RawExceptionHandlers;
   friend class RawField;
   friend class RawFunction;
   friend class RawGrowableObjectArray;
   friend class RawImmutableArray;
   friend class RawInstructions;
   friend class RawRegExp;
   friend class RawLibrary;
   friend class RawLinkedHashMap;
@@ skipping 132 matching lines @@
  private:
   SnapshotWriter* writer_;
   bool as_references_;
 
   DISALLOW_COPY_AND_ASSIGN(SnapshotWriterVisitor);
 };
 
 }  // namespace dart
 
 #endif  // VM_SNAPSHOT_H_