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src/jdk.jcmd/share/classes/sun/tools/jmap/JMap.java
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rev 59026 : jmap baseline
@@ -162,37 +162,61 @@
}
// no filename
return null;
}
+ private static String add_option(String cmd, String opt) {
+ if (cmd.isEmpty()) {
+ return opt;
+ }
+ return cmd + "," + opt;
+ }
+
private static void histo(String pid, String options)
throws AttachNotSupportedException, IOException,
UnsupportedEncodingException {
String liveopt = "-all";
String filename = null;
+ String parallel = null;
String subopts[] = options.split(",");
+ boolean set_all = false;
+ boolean set_live = false;
+ String cmdline = "";
for (int i = 0; i < subopts.length; i++) {
String subopt = subopts[i];
if (subopt.equals("") || subopt.equals("all")) {
- // pass
+ cmdline = add_option(cmdline, "-all");
+ set_all = true;
} else if (subopt.equals("live")) {
- liveopt = "-live";
+ // Add '-' for compatibility.
+ cmdline = add_option(cmdline, "-live");
+ set_live = true;
} else if (subopt.startsWith("file=")) {
filename = parseFileName(subopt);
if (filename == null) {
usage(1); // invalid options or no filename
}
+ cmdline = add_option(cmdline, filename);
+ } else if (subopt.startsWith("parallel=")) {
+ parallel = subopt.substring("parallel=".length());
+ if (parallel == null) {
+ usage(1);
+ }
+ // Add "parallelThreadsNum=<>" for later check
+ cmdline = add_option(cmdline, subopt);
} else {
usage(1);
}
}
+ if (set_live && set_all) {
+ usage(1);
+ }
System.out.flush();
-
// inspectHeap is not the same as jcmd GC.class_histogram
- executeCommandForPid(pid, "inspectheap", liveopt, filename);
+ executeCommandForPid(pid, "inspectheap", cmdline);
}
private static void dump(String pid, String options)
throws AttachNotSupportedException, IOException,
UnsupportedEncodingException {
@@ -285,10 +309,14 @@
System.err.println("");
System.err.println(" histo-options:");
System.err.println(" live count only live objects");
System.err.println(" all count all objects in the heap (default if one of \"live\" or \"all\" is not specified)");
System.err.println(" file=<file> dump data to <file>");
+ System.err.println(" parallel=<number> parallel threads number for heap iteration:");
+ System.err.println(" parallel=0 default behavior, use predefined number of threads");
+ System.err.println(" parallel=1 disable parallel heap iteration");
+ System.err.println(" parallel=<N> use N threads for parallel heap iteration");
System.err.println("");
System.err.println(" Example: jmap -histo:live,file=/tmp/histo.data <pid>");
System.exit(exit);
}
}
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