--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/runtime/7020373/GenOOMCrashClass.java	Wed Jul 27 01:23:29 2011 +0100
@@ -0,0 +1,157 @@
+/*
+ * Copyright (c) 2011, Red Hat Inc. All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ * 
+ * This code is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ * 
+ * This code is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+import java.applet.Applet;
+import java.io.IOException;
+
+import com.sun.org.apache.bcel.internal.Constants;
+import com.sun.org.apache.bcel.internal.generic.AALOAD;
+import com.sun.org.apache.bcel.internal.generic.ACONST_NULL;
+import com.sun.org.apache.bcel.internal.generic.ALOAD;
+import com.sun.org.apache.bcel.internal.generic.ArrayType;
+import com.sun.org.apache.bcel.internal.generic.ClassGen;
+import com.sun.org.apache.bcel.internal.generic.ConstantPoolGen;
+import com.sun.org.apache.bcel.internal.generic.GOTO;
+import com.sun.org.apache.bcel.internal.generic.ICONST;
+import com.sun.org.apache.bcel.internal.generic.IFEQ;
+import com.sun.org.apache.bcel.internal.generic.ILOAD;
+import com.sun.org.apache.bcel.internal.generic.INVOKESTATIC;
+import com.sun.org.apache.bcel.internal.generic.ISTORE;
+import com.sun.org.apache.bcel.internal.generic.InstructionHandle;
+import com.sun.org.apache.bcel.internal.generic.InstructionList;
+import com.sun.org.apache.bcel.internal.generic.JSR;
+import com.sun.org.apache.bcel.internal.generic.MethodGen;
+import com.sun.org.apache.bcel.internal.generic.RETURN;
+import com.sun.org.apache.bcel.internal.generic.Type;
+
+
+public class GenOOMCrashClass {
+
+    public static  String genOOMCrashClass(int maxmeth, int nums/*String[] a*/) throws Exception {
+        String theClassFile = "OOMCrashClass"+nums+"_"+maxmeth;
+        ClassGen cg = new ClassGen(theClassFile, "java.applet.Applet",
+                "<generated>", Constants.ACC_PUBLIC | Constants.ACC_SUPER, null);
+        ConstantPoolGen cp = cg.getConstantPool(); // cg creates constant pool
+
+        //      int br0 = cp.addClass("marc.schoenefeld.2008");
+
+        int br2 = cp.addMethodref("java.lang.Integer", "parseInt",
+                "(Ljava/lang/String;)I");
+
+        Type[] argtype = new Type[] {
+            new ArrayType(Type.STRING, 1)
+        };
+
+        for (int j = 0; j < maxmeth; j++) {
+
+            InstructionList il = new InstructionList();
+
+            String methodName = maxmeth == 1 ? "main" : "main" + j;
+            MethodGen mg = new MethodGen(Constants.ACC_STATIC
+                    | Constants.ACC_PUBLIC,// access flags
+                    Type.VOID, // return type
+                    argtype, new String[] { "argv" }, // arg
+                    // names
+                    methodName, theClassFile, // method, class
+                    il, cp);
+
+            il.append(new ALOAD(0));
+            il.append(new ICONST(0));
+            il.append(new AALOAD()); // load something unpredictable, no folding
+                                     // please
+
+            il.append(new INVOKESTATIC(br2));
+            il.append(new ISTORE(1));
+
+            GOTO gototail = new GOTO(null);
+
+            il.append(gototail);
+
+            InstructionHandle ret = il.append(new RETURN());
+            InstructionHandle ih = null;
+            for (int i = 0; i < nums; i++) {
+                ih = il.append(new ILOAD(1));
+                IFEQ ifeq = new IFEQ(null);
+                il.append(ifeq);
+
+                JSR jsr = new JSR(null);
+                GOTO next = new GOTO(null);
+
+                InstructionHandle h_jsr = il.append(jsr);
+                InstructionHandle h_goto = il.append(next);
+                InstructionHandle h_ret = il.append(new RETURN());
+
+                InstructionHandle danach = il.append(new ACONST_NULL());
+                jsr.setTarget(h_ret);
+                next.setTarget(danach);
+
+                il.append(new GOTO(ih));
+                ifeq.setTarget(ret);
+                ret = ih;
+            }
+
+            gototail.setTarget(ih);
+
+            mg.setMaxStack(Integer.MAX_VALUE); // Needed stack size
+
+            mg.setMaxLocals();
+            cg.addMethod(mg.getMethod());
+        }
+        /* Add public <init> method, i.e. empty constructor */
+        cg.addEmptyConstructor(Constants.ACC_PUBLIC);
+
+        /* Get JavaClass object and dump it to file. */
+        try {
+            System.out.println("dumping:"+theClassFile);
+            cg.getJavaClass().dump(theClassFile + ".class");
+        } catch (java.io.IOException e) {
+            System.err.println(e);
+        }
+        return theClassFile;
+    }
+
+    public static void main(String[] a) throws Exception {
+        int maxmeth_default = 250;
+        int nums_default = 20;
+        int maxmeth;
+        int nums;
+        try {
+            maxmeth = Integer.parseInt(a[0]);
+        }
+        catch (Exception e) {
+            maxmeth = maxmeth_default;
+        }
+        try {
+            nums = Integer.parseInt(a[1]);
+        }
+        catch (Exception e) {
+            nums = nums_default;
+        }       
+        String classname = genOOMCrashClass(maxmeth,nums);
+        System.out.println("Generated");
+        // System.out.println(a[0]);
+        // System.out.println("Loading");
+
+        // long t = System.currentTimeMillis();
+        // Class g2 = Class.forName(classname);
+        // long u = System.currentTimeMillis();
+        // System.out.println(g2 + ":" + (u - t));
+    }
+
+}

--- a/test/runtime/7020373/Test7020373.sh	Wed Jul 27 01:22:13 2011 +0100
+++ b/test/runtime/7020373/Test7020373.sh	Wed Jul 27 01:23:29 2011 +0100
@@ -61,8 +61,13 @@
 
 ${TESTJAVA}${FS}bin${FS}java ${BIT_FLAG} -version
 
-${TESTJAVA}${FS}bin${FS}jar xvf ${TESTSRC}${FS}testcase.jar
+# first step: compile GenOOMCrash generator
+${TESTJAVA}${FS}bin${FS}javac GenOOMCrashClass.java
 
+# second step: run the generator to create test class
+${TESTJAVA}${FS}bin${FS}java GenOOMCrashClass 1 4000
+
+# third step: run the reproducer
 ${TESTJAVA}${FS}bin${FS}java ${BIT_FLAG} OOMCrashClass4000_1 > test.out 2>&1
 
 cat test.out

Binary file test/runtime/7020373/testcase.jar has changed