Support profiling based on linux kernel performance events.

src/platform-win32.cc

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1199 matching lines @@
   // SharedLibraryEvents are logged when loading symbol information.
   // Only the shared libraries loaded at the time of the call to
   // LogSharedLibraryAddresses are logged.  DLLs loaded after
   // initialization are not accounted for.
   if (!LoadDbgHelpAndTlHelp32()) return;
   HANDLE process_handle = GetCurrentProcess();
   LoadSymbols(process_handle);
 }
 
 
+void OS::SignalCodeMovingGC() {
+}
+
+
 // Walk the stack using the facilities in dbghelp.dll and tlhelp32.dll
 
 // Switch off warning 4748 (/GS can not protect parameters and local variables
 // from local buffer overrun because optimizations are disabled in function) as
 // it is triggered by the use of inline assembler.
 #pragma warning(push)
 #pragma warning(disable : 4748)
 int OS::StackWalk(Vector<OS::StackFrame> frames) {
   BOOL ok;
 
@@ skipping 703 matching lines @@
 
   // Release the thread handles
   CloseHandle(data_->sampler_thread_);
   CloseHandle(data_->profiled_thread_);
 }
 
 
 #endif  // ENABLE_LOGGING_AND_PROFILING
 
 } }  // namespace v8::internal