Statistical Analysis of Core Libs Bytecode using JarScan

public interface IJarScanOperation
{
   void processInstructions(String className, MemberBytecode memberBytecode);
}

JarScan --mode=<mode> [--packages=a,b,c,...] [params] <jars>
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Available modes:
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 maxMethodSize            List every method with bytecode larger than specified limit.
    --limit=n             Report methods larger than n bytes.
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 sequenceCount            Count instruction sequences.
    --length=n            Report sequences of length n.
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 invokeCount              Count the most called methods for each invoke instruction.
   [--limit=n]            Limit to top n results per invoke type.
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 nextInstructionFreq      List the most popular next instruction for each bytecode instruction.
   [--limit=n]            Limit to top n results per instruction.
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 allocationCount          Count the most allocated types.
   [--limit=n]            Limit to top n results.
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 instructionCount         Count occurences of each bytecode instruction.
   [--limit=n]            Limit to top n results.
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 sequenceSearch           List methods containing the specified bytecode sequence.
    --sequence=a,b,c,...  Comma separated sequence of bytecode instructions.

javax   19M
java    20M
org      4M
sun     24M
com     48M
jdk      2M

com.sun.accessibility.internal.resources.accessibility_*.getContents()
com.sun.java.swing.plaf.gtk.resources.gtk_*.getContents()
com.sun.java.swing.plaf.motif.resources.motif_*.getContents()
com.sun.java.swing.plaf.windows.resources.windows_*.getContents()
com.sun.java.util.jar.pack.DriverResource_*.<clinit>()
com.sun.org.apache.xalan.internal.res.XSLTErrorResources_*.getContents()
com.sun.org.apache.xalan.internal.xsltc.compiler.util.ErrorMessages_*.getContents()
sun.awt.resources.awt_*.getContents()
sun.security.tools.policytool.Resources_*.<clinit>()
...

#!/bin/sh
export JAR=/home/chris/jdk1.8.0_74/jre/lib/rt.jar
export PACKAGES=java.*

./jarScan.sh --mode=maxMethodSize --limit=325 --packages=$PACKAGES $JAR > results/freqInlineSize.csv
./jarScan.sh --mode=sequenceCount --length=2  --packages=$PACKAGES $JAR > results/sequence2.csv
./jarScan.sh --mode=sequenceCount --length=3  --packages=$PACKAGES $JAR > results/sequence3.csv
./jarScan.sh --mode=sequenceCount --length=4  --packages=$PACKAGES $JAR > results/sequence4.csv
./jarScan.sh --mode=sequenceCount --length=5  --packages=$PACKAGES $JAR > results/sequence5.csv
./jarScan.sh --mode=invokeCount               --packages=$PACKAGES $JAR > results/invokeCount.csv
./jarScan.sh --mode=allocationCount           --packages=$PACKAGES $JAR > results/allocationCount.csv
./jarScan.sh --mode=nextInstructionFreq       --packages=$PACKAGES $JAR > results/nextInstruction.csv
./jarScan.sh --mode=instructionCount          --packages=$PACKAGES $JAR > results/instructionCount.csv
./jarScan.sh --mode=sequenceSearch --sequence=iconst_2,newarray --packages=$PACKAGES $JAR > results/sequenceSearchExample.csv

iconst_2 // push integer constant 2 onto the stack
newarray // create a primitive array

public static char[] toChars(int);
   descriptor: (I)[C
   flags: ACC_PUBLIC, ACC_STATIC
   Code:
     stack=4, locals=2, args_size=1
        0: iload_0
        1: invokestatic  #27                 // Method isBmpCodePoint:(I)Z
        4: ifeq          16
        7: iconst_1
        8: newarray       char
       10: dup
       11: iconst_0
       12: iload_0
       13: i2c
       14: castore
       15: areturn
       16: iload_0
       17: invokestatic  #28                 // Method isValidCodePoint:(I)Z
       20: ifeq          35
       23: iconst_2
       24: newarray       char
       26: astore_1
       27: iload_0
       28: aload_1
       29: iconst_0
       30: invokestatic  #29                 // Method toSurrogates:(I[CI)V
       33: aload_1
       34: areturn
       35: new           #30                 // class java/lang/IllegalArgumentException
       38: dup
       39: invokespecial #31                 // Method java/lang/IllegalArgumentException."<init>":()V
       42: athrow

   public static char[] toChars(int codePoint) {
       if (isBmpCodePoint(codePoint)) {
           return new char[] { (char) codePoint };
       } else if (isValidCodePoint(codePoint)) {
           char[] result = new char[2];
           toSurrogates(codePoint, result, 0);
           return result;
       } else {
           throw new IllegalArgumentException();
       }
   }