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src/jdk.jcmd/share/classes/sun/tools/jstack/JStack.java

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rev 50464 : Thread Dump Extension (memory allocation)

@@ -46,10 +46,11 @@
         }
 
         checkForUnsupportedOptions(args);
 
         boolean locks = false;
+        boolean extended = false;
 
         // Parse the options (arguments starting with "-" )
         int optionCount = 0;
         while (optionCount < args.length) {
             String arg = args[optionCount];

@@ -65,13 +66,17 @@
             }
             else {
                 if (arg.equals("-l")) {
                     locks = true;
                 } else {
+                    if (arg.equals("-e")) {
+                        extended = true;
+                    } else {
                     usage(1);
                 }
             }
+            }
             optionCount++;
         }
 
         // Next we check the parameter count.
         int paramCount = args.length - optionCount;

@@ -79,16 +84,18 @@
             usage(1);
         }
 
         // pass -l to thread dump operation to get extra lock info
         String pidArg = args[optionCount];
-        String params[];
+        String params[]= new String[] { "" };
+        if (extended) {
+            params[0] += "-e ";
+        }
         if (locks) {
-            params = new String[] { "-l" };
-        } else {
-            params = new String[0];
+            params[0] += "-l";
         }
+
         ProcessArgumentMatcher ap = new ProcessArgumentMatcher(pidArg);
         Collection<String> pids = ap.getVirtualMachinePids(JStack.class);
 
         if (pids.isEmpty()) {
             System.err.println("Could not find any processes matching : '" + pidArg + "'");

@@ -168,14 +175,15 @@
     }
 
     // print usage message
     private static void usage(int exit) {
         System.err.println("Usage:");
-        System.err.println("    jstack [-l] <pid>");
+        System.err.println("    jstack [-l][-e] <pid>");
         System.err.println("        (to connect to running process)");
         System.err.println("");
         System.err.println("Options:");
         System.err.println("    -l  long listing. Prints additional information about locks");
+        System.err.println("    -e  extended listing. Prints additional information about threads");
         System.err.println("    -? -h --help -help to print this help message");
         System.exit(exit);
     }
 }
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