Move symbol table from per isolate snapshot to vm isolate snapshot, this reduces the per isolate in…

runtime/bin/run_vm_tests.cc

 // 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.
 
 #include <stdio.h>
 
 #include "bin/file.h"
 
 #include "vm/benchmark_test.h"
 #include "vm/dart.h"
 #include "bin/dartutils.h"
 #include "vm/unit_test.h"
 
 
 // TODO(iposva, asiva): This is a placeholder for the real unittest framework.
 namespace dart {
 
+// vm_isolate_snapshot_buffer points to a snapshot for the vm isolate if we
+// link in a snapshot otherwise it is initialized to NULL.
+extern const uint8_t* bin::vm_isolate_snapshot_buffer;
+
 // Only run tests that match the filter string. The default does not match any
 // tests.
 static const char* const kNone = "No Test or Benchmarks";
 static const char* const kList = "List all Tests and Benchmarks";
 static const char* const kAllBenchmarks = "All Benchmarks";
 static const char* run_filter = kNone;
 
 static int run_matches = 0;
 
 
@@ skipping 62 matching lines @@
     // Last argument is the test name, the rest are vm flags.
     run_filter = argv[argc - 1];
     // Remove the first value (executable) from the arguments and
     // exclude the last argument which is the test name.
     dart_argc = argc - 2;
     dart_argv = &argv[1];
   }
   bool set_vm_flags_success = Flags::ProcessCommandLineFlags(dart_argc,
                                                              dart_argv);
   ASSERT(set_vm_flags_success);
-  const char* err_msg = Dart::InitOnce(NULL,
+  const char* err_msg = Dart::InitOnce(dart::bin::vm_isolate_snapshot_buffer,
                                        NULL, NULL, NULL, NULL,
                                        dart::bin::DartUtils::OpenFile,
                                        dart::bin::DartUtils::ReadFile,
                                        dart::bin::DartUtils::WriteFile,
                                        dart::bin::DartUtils::CloseFile,
                                        NULL);
   ASSERT(err_msg == NULL);
   // Apply the filter to all registered tests.
   TestCaseBase::RunAll();
   // Apply the filter to all registered benchmarks.
   Benchmark::RunAll(argv[0]);
   // Print a warning message if no tests or benchmarks were matched.
   if (run_matches == 0) {
     fprintf(stderr, "No tests matched: %s\n", run_filter);
     return 1;
   }
   return 0;
 }
 
 }  // namespace dart
 
 
 int main(int argc, const char** argv) {
   return dart::Main(argc, argv);
 }