Observatory: Report peak process memory usage.

runtime/vm/os_win.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 "vm/globals.h"
 #if defined(TARGET_OS_WINDOWS)
 
 #include "vm/os.h"
 
 #include <malloc.h>  // NOLINT
 #include <process.h>  // NOLINT
+#include <psapi.h>  // NOLINT
 #include <time.h>  // NOLINT
 
 #include "platform/utils.h"
 #include "platform/assert.h"
 #include "vm/os_thread.h"
 #include "vm/zone.h"
 
 namespace dart {
 
 // Defined in vm/os_thread_win.cc
@@ skipping 206 matching lines @@
 }
 
 
 int OS::NumberOfAvailableProcessors() {
   SYSTEM_INFO info;
   GetSystemInfo(&info);
   return info.dwNumberOfProcessors;
 }
 
 
+uinptr_t OS::MaxRSS() {
+  PROCESS_MEMORY_COUNTERS pmc;
+  GetProcessMemoryInfo(GetCurrentProcess(), &pmc, sizeof(pmc));
+  return pmc.PeakWorkingSetSize;
+}
+
+
 void OS::Sleep(int64_t millis) {
   ::Sleep(millis);
 }
 
 
 void OS::SleepMicros(int64_t micros) {
   // Windows only supports millisecond sleeps.
   if (micros < kMicrosecondsPerMillisecond) {
     // Calling ::Sleep with 0 has no determined behaviour, round up.
     micros = kMicrosecondsPerMillisecond;
@@ skipping 199 matching lines @@
   // TODO(zra): Remove once VM shuts down cleanly.
   private_flag_windows_run_tls_destructors = false;
   // On Windows we use ExitProcess so that threads can't clobber the exit_code.
   // See: https://code.google.com/p/nativeclient/issues/detail?id=2870
   ::ExitProcess(code);
 }
 
 }  // namespace dart
 
 #endif  // defined(TARGET_OS_WINDOWS)