Re: [jchevm] class loader questions
May be this is synthetic field (inner-parent reference)?
Check java asm for this test:
public class Test {
Object field;
public class Inner {
Inner() {
field = null;
}
}
}
public class Test$Inner extends java.lang.Object{
Test$Inner(Test);
Code:
0: aload_0
1: invokespecial #1; //Method java/lang/Object.init:()V
4: aload_0
5: aload_1
6: putfield#2; //Field this$0:LTest;
9: aload_1
10: aconst_null
11: putfield#3; //Field Test.field:Ljava/lang/Object;
14: return
On 5/22/06, Weldon Washburn [EMAIL PROTECTED] wrote:
--
Mikhail Fursov
Intel Middleware Products Division
Re: [jchevm] class loader questions
Weldon,
I confused this$ and class$ fields in your example.
Here is another example where class$ method is generated and used:
public class Test2 {
public static void main(String[] args) {
Class cls = Test2.class;
}
}
and javap output is:
public class Test2 extends java.lang.Object{
static java.lang.Class class$Test2;
public Test2();
Code:
0:aload_0
1:invokespecial#6; //Method java/lang/Object.init:()V
4:return
public static void main(java.lang.String[]);
Code:
0:getstatic#7; //Field class$Test2:Ljava/lang/Class;
3:ifnonnull18
6:ldc#8; //String Test2
8:invokestatic#9; //Method
class$:(Ljava/lang/String;)Ljava/lang/Class;
11:dup
12:putstatic#7; //Field class$Test2:Ljava/lang/Class;
15:goto21
18:getstatic#7; //Field class$Test2:Ljava/lang/Class;
21:astore_1
22:return
static java.lang.Class class$(java.lang.String);
Code:
0:aload_0
1:invokestatic#1; //Method
java/lang/Class.forName:(Ljava/lang/String;)Ljava/lang/Class;
4:areturn
5:astore_1
6:new#3; //class NoClassDefFoundError
9:dup
10:aload_1
11:invokevirtual#4; //Method
java/lang/ClassNotFoundException.getMessage:()Ljava/lang/String;
14:invokespecial#5; //Method
java/lang/NoClassDefFoundError.init:(Ljava/lang/String;)V
17:athrow
Exception table:
from to target type
0 4 5 Class java/lang/ClassNotFoundException
}
On 5/22/06, Mikhail Fursov [EMAIL PROTECTED] wrote:
--
Mikhail Fursov
Intel Middleware Products Division
Re: [jchevm] class loader questions
Method class$ is synthetic and is produced by the Java compiler for some class which references some class by the construct some class name.class in its method' code. For example, the code --- Class c1 = Object.class; --- will produce the following Java assembly for method class$ --- Method name:class$ static Signature: 26=(java.lang.String)java.lang.Class Attribute Code, length:50, max_stack:3, max_locals:2, code_length:18 0: aload_0 1: invokestatic #1=Method java.lang.Class.forName (java.lang.String )java.lang.Class 4: areturn 5: astore_1 6: new #3=Class java.lang.NoClassDefFoundError 9: dup 10: aload_1 11: invokevirtual #4=Method java.lang.ClassNotFoundException.getMessage()java.lang.String 14: invokespecial #5=Method java.lang.NoClassDefFoundError.init ( java.lang.String)void 17: athrow Exceptions (count: 1): start: 0, end: 4, handler: 5, type: 2=java.lang.ClassNotFoundException Attribute LineNumberTable, length:6, count: 1 line: 4 at pc: 0 Attribute Synthetic, length:0 --- On 5/22/06, Weldon Washburn [EMAIL PROTECTED] wrote: There is a problem in the early boot stage with the method class$ from the current version of java/lang/Character. What is exact problem you are experiencing with this method? How did you get to the fact it is related to java/lang/Character? Pavel Pervov, Intel Middleware Products Division.
[jchevm] class loader questions
All, I am in the process of moving gnuclasspathadapter to a much new version of Harmony Class Library. I did an svn update two days ago. There is a problem in the early boot stage with the method class$ from the current version of java/lang/Character. I have looked at java/lang/Character.class for a method called, class$ and can't find any evidence of it. Does anyone have any suggestions? Could class$ somehow be related to inner classes?? My next step is to use the debugger to watch the class loader load method class$. -- Weldon Washburn Intel Middleware Products Division - Terms of use : http://incubator.apache.org/harmony/mailing.html To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
