Mercurial > hg > truffle
comparison test/runtime/6626217/bug_21227.java @ 1715:495caa35b1b5
6977952: Test: Sync missing tests from hs16.3 to hs17.x
Reviewed-by: wrockett
author | asaha |
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date | Tue, 17 Aug 2010 22:52:50 -0700 |
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1714:f121b2772674 | 1715:495caa35b1b5 |
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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 |