Name: szC45993 Date: 08/15/97



JDK1.2G doesn't process StackOverflowError correctly.
It causes VM crash with "Segmentation Fault".
See JCK test tests/vm/concepts/exceptions/exceptions031/exceptions03101/exceptions03101.java

Note that JDK 1.1.3/1.1.4 pass the test successfully.

> set JH=/export/ld14/java/dest/jdk1.2G/solaris
> $JH/bin/java -fullversion
java full version "JDK1.2G"
> $JH/bin/javac -d . exceptions03101.java
> $JH/bin/java -verify exceptions03101
Segmentation Fault (core dumped)
> set JH=/export/ld14/java/dest/jdk1.1.4/solaris
> $JH/bin/java -fullversion
java full version "JDK-sparkler_B"
> $JH/bin/java -verify exceptions03101
OKAY!

SOURCE:

--------------------- exceptions03101.java
//File: @(#)exceptions03101.java 1.1 97/07/15
//Copyright 07/15/97 Sun Microsystems, Inc. All Rights Reserved

//package javasoft.sqe.tests.vm.exceptions.exceptions031.exceptions03101;

import java.io.PrintStream;

public class exceptions03101 {

  public static int i1;

  public static int prc(int i) {


if (i == 1979) {
return prc(1979);
} else {
return 7;
};

  }

  public static int run(String argv[], PrintStream out) {


try{

i1 = prc(1979);

} catch (StackOverflowError e) {
out.println("OKAY!");
return 0;
};

out.println("BAD!");
return 2;

  }

  public static void main(String argv[]) {
System.exit(run(argv, System.out) + 95/*STATUS_TEMP*/);
  }
}
---------------------

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Name: icC57033 Date: 09/03/97



It seems like fixes for #4016967, #4031122 doesn't solve
stack overflow problem yet. Let's change exceptions03101 test case
using Jasm and increase stack size of "prc" method from 2 to 20000.

Most of JDK versions execute this test incorrectly:

1.1.1, 1.1.2G, 1.1.3F, 1.1.4 throw an InternalError instead StackOverflowError,
1.2G throws Segmentation Fault,
1.2H, 1.2I hangup.

Status of #4016967, #4031122 is "integrated" but
it's easy to change test example from #4016967 a little
and show that bug is still here:
...
  public static void main(String[] args) {
    for (int j = 0; j < 200; j++) { // INCREASE FROM 20 TO 200
      System.out.println("Iteration " + j);
      awful(j);
    }
  }
...

Then we have:
1.1.1, 1.1.2G, 1.1.3F, 1.1.4 throw an InternalError
1.2G throws Segmentation Fault,
1.2H, 1.2I hangup.


--------------------- exceptions03101.jasm
public super class exceptions03101
{
// Compiled from "exceptions03101.java"
// Compiler version 3.45;

public static Field i1:I;

public static Method prc:"(I)I"
stack 20000 locals 1 // CHANGED FROM 2 TO 20000
{
iload_0;
sipush 1979;
if_icmpne L14;
sipush 1979;
invokestatic Method prc:"(I)I";
ireturn;
L14: bipush 7;
ireturn;
}

public static Method run:"([Ljava/lang/String;Ljava/io/PrintStream;)I"
stack 2 locals 2
{
try t12;
sipush 1979;
invokestatic Method prc:"(I)I";
putstatic Field i1:"I";
endtry t12;
goto L21;
catch t12 java/lang/StackOverflowError;
pop;
aload_1;
ldc String "OKAY!";
invokevirtual Method java/io/PrintStream.println:"(Ljava/lang/String;)V";
iconst_0;
ireturn;
L21: aload_1;
ldc String "BAD!";
invokevirtual Method java/io/PrintStream.println:"(Ljava/lang/String;)V";
iconst_2;
ireturn;
}

public static Method main:"([Ljava/lang/String;)V"
stack 2 locals 1
{
aload_0;
getstatic Field java/lang/System.out:"Ljava/io/PrintStream;";
invokestatic Method run:"([Ljava/lang/String;Ljava/io/PrintStream;)I";
bipush 95;
iadd;
invokestatic Method java/lang/System.exit:"(I)V";
return;
}

public Method "<init>":"()V"
stack 1 locals 1
{
aload_0;
invokespecial Method java/lang/Object."<init>":"()V";
return;
}

} // end Class exceptions03101
---------------------

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