Initial prototype of vmstats support, based on Dart VM Stats draft design doc.

runtime/bin/main.cc

Index: runtime/bin/main.cc
===================================================================
--- runtime/bin/main.cc	(revision 18152)
+++ runtime/bin/main.cc	(working copy)
@@ -20,6 +20,7 @@
 #include "bin/log.h"
 #include "bin/platform.h"
 #include "bin/process.h"
+#include "bin/vmstats.h"
 #include "platform/globals.h"
 
 // snapshot_buffer points to a snapshot if we link in a snapshot otherwise
@@ -47,6 +48,8 @@
 static const char* debug_ip = DEFAULT_DEBUG_IP;
 static int debug_port = 0;
 
+// Global state that defines the VmStats web server port.
+static int visual_vm_port = 0;
 
 // Value of the --package-root flag.
 // (This pointer points into an argv buffer and does not need to be
@@ -164,6 +167,17 @@
 }
 
 
+static bool ProcessVmStatsPortOption(const char* port) {
+  ASSERT(port != NULL);
+  if (*port == '\0') {
+    visual_vm_port = 0;
+  } else {
+    visual_vm_port = atoi(port);
+  }
+  return true;
+}
+
+
 static bool ProcessGenScriptSnapshotOption(const char* filename) {
   if (filename != NULL && strlen(filename) != 0) {
     // Ensure that are already running using a full snapshot.
@@ -207,6 +221,7 @@
   { "--debug", ProcessDebugOption },
   { "--use-script-snapshot=", ProcessUseScriptSnapshotOption },
   { "--generate-script-snapshot=", ProcessGenScriptSnapshotOption },
+  { "--vmstats_port=", ProcessVmStatsPortOption },
   { NULL, NULL }
 };
 
@@ -488,6 +503,7 @@
     return false;
   }
   Dart_ExitScope();
+  dart::VmStats::AddIsolate(reinterpret_cast<IsolateData*>(data), isolate);
   return true;
 }
 
@@ -627,6 +643,7 @@
 
 static void ShutdownIsolate(void* callback_data) {
   IsolateData* isolate_data = reinterpret_cast<IsolateData*>(callback_data);
+  dart::VmStats::RemoveIsolate(isolate_data);
   EventHandler* handler = isolate_data->event_handler;
   if (handler != NULL) handler->Shutdown();
   delete isolate_data;
@@ -713,6 +730,10 @@
 
   Dart_EnterScope();
 
+  if (visual_vm_port > 0) {
+    dart::VmStats::Start(visual_vm_port);
+  }
+
   if (generate_script_snapshot) {
     // First create a snapshot.
     Dart_Handle result;
@@ -773,6 +794,7 @@
   }
 
   Dart_ExitScope();
+  dart::VmStats::Stop();
   // Shutdown the isolate.
   Dart_ShutdownIsolate();
   // Terminate process exit-code handler.