Compact the symbol table when creating core snapshots or JIT app snapshots.

runtime/vm/dart_api_impl.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 "include/dart_api.h"
 #include "include/dart_mirrors_api.h"
 #include "include/dart_native_api.h"
 
 #include "platform/assert.h"
 #include "lib/stacktrace.h"
@@ skipping 1559 matching lines @@
     return state;
   }
   I->StopBackgroundCompiler();
 
 #if defined(DEBUG)
   I->heap()->CollectAllGarbage();
   CheckFunctionTypesVisitor check_canonical(T);
   I->heap()->IterateObjects(&check_canonical);
 #endif  // #if defined(DEBUG)
 
+  Symbols::Compact(I);
+
   FullSnapshotWriter writer(Snapshot::kCore, vm_isolate_snapshot_buffer,
                             isolate_snapshot_buffer, ApiReallocate,
                             NULL /* instructions_writer */);
   writer.WriteFullSnapshot();
   *vm_isolate_snapshot_size = writer.VmIsolateSnapshotSize();
   *isolate_snapshot_size = writer.IsolateSnapshotSize();
   return Api::Success();
 }
 
 
@@ skipping 5168 matching lines @@
   if (rodata_blob_size == NULL) {
     RETURN_NULL_ERROR(instructions_blob_size);
   }
   // Finalize all classes if needed.
   Dart_Handle state = Api::CheckAndFinalizePendingClasses(T);
   if (::Dart_IsError(state)) {
     return state;
   }
   I->StopBackgroundCompiler();
 
+  Symbols::Compact(I);
+
   NOT_IN_PRODUCT(TimelineDurationScope tds2(T, Timeline::GetIsolateStream(),
                                             "WriteAppJITSnapshot"));
   BlobInstructionsWriter instructions_writer(instructions_blob_buffer,
                                              rodata_blob_buffer, ApiReallocate,
                                              2 * MB /* initial_size */);
   FullSnapshotWriter writer(Snapshot::kAppJIT, NULL, isolate_snapshot_buffer,
                             ApiReallocate, &instructions_writer);
   writer.WriteFullSnapshot();
   *isolate_snapshot_size = writer.IsolateSnapshotSize();
   *instructions_blob_size = instructions_writer.InstructionsBlobSize();
@@ skipping 13 matching lines @@
 }
 
 
 DART_EXPORT void Dart_DumpNativeStackTrace(void* context) {
 #ifndef PRODUCT
   Profiler::DumpStackTrace(context);
 #endif
 }
 
 }  // namespace dart