src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/SALauncher.java

@@ -86,11 +86,11 @@
         System.out.println("    --mixed\tto print both java and native frames (mixed mode)");
         return commonHelp();
     }
 
     private static boolean jsnapHelp() {
-        System.out.println(" <no option>\tdump performance counters");
+        System.out.println("    --all\tto print all performance counters");
         return commonHelp();
     }
 
     private static boolean toolHelp(String toolName) {
         if (toolName.equals("jstack")) {

@@ -329,11 +329,11 @@
         JInfo.main(newArgs.toArray(new String[newArgs.size()]));
     }
 
     private static void runJSNAP(String[] oldArgs) {
         SAGetopt sg = new SAGetopt(oldArgs);
-        String[] longOpts = {"exe=", "core=", "pid="};
+        String[] longOpts = {"exe=", "core=", "pid=", "all"};
 
         ArrayList<String> newArgs = new ArrayList();
         String exe = null;
         String pid = null;
         String core = null;

@@ -350,10 +350,14 @@
             }
             if (s.equals("pid")) {
                 pid = sg.getOptarg();
                 continue;
             }
+            if (s.equals("all")) {
+                newArgs.add("-a");
+                continue;
+            }
         }
 
         buildAttachArgs(newArgs, pid, exe, core);
         JSnap.main(newArgs.toArray(new String[newArgs.size()]));
     }