Output precompiled snapshot size.

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 786 matching lines @@
 };
 
 
 class InstructionsWriter : public ZoneAllocated {
  public:
   InstructionsWriter(uint8_t** buffer,
                      ReAlloc alloc,
                      intptr_t initial_size)
     : stream_(buffer, alloc, initial_size),
       next_offset_(InstructionsSnapshot::kHeaderSize),
+      binary_size_(0),
       instructions_() {
     ASSERT(buffer != NULL);
     ASSERT(alloc != NULL);
   }
 
-  // Size of the snapshot.
+  // 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);
 
   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();
@@ skipping 16 matching lines @@
     };
   };
 
   void WriteWordLiteral(uword value) {
     // Padding is helpful for comparing the .S with --disassemble.
 #if defined(ARCH_IS_64_BIT)
     stream_.Print(".quad 0x%0.16" Px "\n", value);
 #else
     stream_.Print(".long 0x%0.8" Px "\n", value);
 #endif
+    binary_size_ += sizeof(value);
   }
 
   WriteStream stream_;
   intptr_t next_offset_;
+  intptr_t binary_size_;
   GrowableArray<InstructionsData> instructions_;
 
   DISALLOW_COPY_AND_ASSIGN(InstructionsWriter);
 };
 
 
 class SnapshotWriter : public BaseWriter {
  protected:
   SnapshotWriter(Snapshot::Kind kind,
                  Thread* thread,
@@ skipping 256 matching lines @@
  private:
   SnapshotWriter* writer_;
   bool as_references_;
 
   DISALLOW_COPY_AND_ASSIGN(SnapshotWriterVisitor);
 };
 
 }  // namespace dart
 
 #endif  // VM_SNAPSHOT_H_