Undo "Don't include an object header for instructions in the text section."

runtime/vm/isolate.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/isolate.h"
 
 #include "include/dart_api.h"
 #include "include/dart_native_api.h"
 #include "platform/assert.h"
 #include "platform/text_buffer.h"
@@ skipping 916 matching lines @@
     result->LowLevelShutdown();
     Thread::ExitIsolate();
     delete result;
     return NULL;
   }
 
   return result;
 }
 
 
+void Isolate::SetupInstructionsSnapshotPage(
+    const uint8_t* instructions_snapshot_buffer) {
+  InstructionsSnapshot snapshot(instructions_snapshot_buffer);
+#if defined(DEBUG)
+  if (FLAG_trace_isolates) {
+    OS::Print("Precompiled instructions are at [0x%" Px ", 0x%" Px ")\n",
+              reinterpret_cast<uword>(snapshot.instructions_start()),
+              reinterpret_cast<uword>(snapshot.instructions_start()) +
+              snapshot.instructions_size());
+  }
+#endif
+  heap_->SetupExternalPage(snapshot.instructions_start(),
+                           snapshot.instructions_size(),
+                           /* is_executable = */ true);
+}
+
+
 void Isolate::SetupDataSnapshotPage(const uint8_t* data_snapshot_buffer) {
   DataSnapshot snapshot(data_snapshot_buffer);
 #if defined(DEBUG)
   if (FLAG_trace_isolates) {
     OS::Print("Precompiled rodata are at [0x%" Px ", 0x%" Px ")\n",
               reinterpret_cast<uword>(snapshot.data_start()),
               reinterpret_cast<uword>(snapshot.data_start()) +
               snapshot.data_size());
   }
 #endif
@@ skipping 1752 matching lines @@
 void IsolateSpawnState::DecrementSpawnCount() {
   ASSERT(spawn_count_monitor_ != NULL);
   ASSERT(spawn_count_ != NULL);
   MonitorLocker ml(spawn_count_monitor_);
   ASSERT(*spawn_count_ > 0);
   *spawn_count_ = *spawn_count_ - 1;
   ml.Notify();
 }
 
 }  // namespace dart