rednaxelafx

import java.util.*;
import java.util.concurrent.*;

import static java.util.Comparators.comparing;

public class TestRandomizeString {
  public static void main(String[] args) {
    ThreadLocalRandom random = ThreadLocalRandom.current();
    String text = args[0];
    String result = String.join(" ",

rednaxelafx

{method} 
 - klass: {other class}
 - this oop:          0x00000000bc925718
 - method holder:     'StopThread$1'
 - constants:         0x00000000bc925430 constant pool [29] for 'StopThread$1' cache=0x00000000bc925a90
 - access:            0xc1000001  public 
 - name:              'run'
 - signature:         '()V'
 - max stack:         1
 - max locals:        2

rednaxelafx

kmo@ubuntu:~
$ groovysh
Groovy Shell (2.0.1, JVM: 1.8.0-ea)
Type 'help' or '\h' for help.
------------------------------------------------------------------------------------------------------------------------------------------
groovy:000> 
"Executing ps"
 for thread: "main" #1 prio=5 os_prio=0 tid=0x00007f292800c000 nid=0x5fcb runnable [0x00007f293226c000]
   java.lang.Thread.State: RUNNABLE
   JavaThread state: _thread_in_native

rednaxelafx

----------------------------------------------------------------------
Interpreter

code size        =    109K bytes
total space      =    199K bytes
wasted space     =     90K bytes

# of codelets    =    259
avg codelet size =    431 bytes

rednaxelafx

using System;
using System.Collections;
using System.Collections.Generic;
using System.Diagnostics;
using System.Runtime.CompilerServices;
using System.Threading;
internal class Test
{
	[CompilerGenerated]
	private sealed class <GetNaturals>d__0 : IEnumerable<int>, IEnumerable, IEnumerator<int>, IEnumerator, IDisposable

rednaxelafx

$ $JAVA_HOME/bin/java -version
java version "1.7.0_05"
Java(TM) SE Runtime Environment (build 1.7.0_05-b06)
Java HotSpot(TM) 64-Bit Server VM (build 23.1-b03, mixed mode)
$ jps
15245 JConsole
15269 Jps
$ sudo $JAVA_HOME/bin/java -cp $JAVA_HOME/lib/sa-jdi.jar sun.jvm.hotspot.CLHSDB
hsdb> attach 15245
Attaching to process 15245, please wait...

rednaxelafx

vframe.cpp

void javaVFrame::print_lock_info_on(outputStream* st, int frame_count) {
  // If this is the first frame, and java.lang.Object.wait(...) then print out the receiver.
  if (frame_count == 0) {
    if (method()->name() == vmSymbols::wait_name() &&
        instanceKlass::cast(method()->method_holder())->name() == vmSymbols::java_lang_Object()) {
      // ...
  }

rednaxelafx

public class ExtraUse {
  public static void foo(Pair p) {
    String s = "testing";
    StringBuilder sb = new StringBuilder().append(s);
    p.first = sb;
    p.second = sb.append(s).toString();
  }

  public static void main(String[] args) throws Exception {
    Pair p = new Pair();

rednaxelafx

Decoding compiled method 0x00007f9877cbbf90:
Code:
[Entry Point]
[Verified Entry Point]
[Constants]
  # {method} 'foo' '()Ljava/lang/String;' in 'MultipleUse'
  #           [sp+0x30]  (sp of caller)
  ;; N1: #	B1 <- B12 B5  Freq: 1

  ;; B1: #	B6 B2 <- BLOCK HEAD IS JUNK   Freq: 1

rednaxelafx

public class AppendAfterToString {
  public static void foo(Pair p) {
    String s = "testing";
    StringBuilder sb = new StringBuilder();
    sb.append(s).append(s);
    p.first = sb.toString();
    sb.append(s);
    p.second = sb.toString();
  }