Optimizing JIT compiler crashs with Segmentation violation

Name: szC45993 Date: 09/21/99



Tonga/testbase_js/src/nsk/coverage/ad_i486/ad_i486002 test
destroys java (java version "1.2.2", Java(TM) HotSpot Server VM [2.0beta,
mixed mode, build E]) on WinNT (Pentium II, 350MHz, 128Mb RAM,
Windows NT 4.0 Workstation). The test provides generation
of AbsFNode node in internal representation under the optimizing
compilation process (see line "ad_i486002a.fff = (ff > 0.0f ? 0.0f - ff : ff-f);").
The next AbsFNode node processing destroys compiler.

See log and source below.

[#] cd f:/ld24/java/zss/TONGA_WSs/testbase_js/src/nsk/coverage/ad_i486/ad_i486002
[#] d:/from_C/jdk1.2.2W/bin/java -version
java version "1.2.2"
Java(TM) HotSpot Server VM (2.0beta, mixed mode, build E)
[#] d:/from_C/jdk1.2.2W/bin/java -verify ad_i486002
[1] + Done(139) d:/from_C/jdk1.2.2W/bin/java -verify ad_i486002
  189 Segmentation violation d:/from_C/jdk1.2.2W/bin/java
[#]

SOURCE:
========

//--------------------- ad_i486002.java:
// Ident: %Z%%M% %I% %E%
// Copyright %G% Sun Microsystems, Inc. All Rights Reserved

import java.io.PrintStream;

class ad_i486002a {

  public static double fff = .7f;

}

public class ad_i486002 {

  public static void P_R_C_2(float f, float ff) {
int k = 0;

for (k = 100; k >= 2; k-=2) {
ad_i486002a.fff = (ff > 0.0f ? 0.0f - ff : ff-f);
}
  }

  public static void P_R_C_1() {
int k = 0;
float f1 = 1.0f;
float f2 = 0.1f;

ad_i486002a cna = new ad_i486002a();

synchronized (cna) {
for (k = 0; k <= 1000000; k++) {
P_R_C_2(f1 - (f1 + f2), f2);
}
}
  }

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

P_R_C_1();
return 0;
  }

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


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