Hello everyone,
I am able to work very well with annotations in C/C++, by using
__attribute__((annotate("MYANNOTATION"))) static int a; . Inside the
LLVM
bytecode I have @llvm.global.annotations and @llvm.var.annotation.
However, I was trying to test annotations also in Java, with VMKit. These
are the commands that I run:
javac -Xlint -g -O Main.java
../Release+Asserts/bin/vmjc Main
../Release+Asserts/bin/j3 Main
../../llvm_new/Release+Asserts/bin/llvm-dis < Main.bc > Main_assembly
My small program is :
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import java.lang.reflect.Method;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@interface Red {
String info() default "";
}
class Annotated {
@Red(info = "AWESOME")
public void foo(String myParam) {
System.out.println("This is " + myParam);
}
}
class TestAnnotationParser {
public void parse(Class clazz) throws Exception {
Method[] methods = clazz.getMethods();
for (Method method : methods) {
if (method.isAnnotationPresent(Red.class)) {
Red test = method.getAnnotation(Red.class);
String info = test.info();
if ("AWESOME".equals(info)) {
System.out.println("info is awesome!");
// try to invoke the method with param
method.invoke(
Annotated.class.newInstance(),
info
);
}
}
}
}
}
public class Main {
public static void main(String[] args) throws Exception {
TestAnnotationParser parser = new TestAnnotationParser();
parser.parse(Annotated.class);
}
}
However, I cannot find the annotations in the bytecode. It is something
that I did wrong?
Thank you in advance !
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Hello Alexandru, No you did nothing wrong. We are using our own data structure to describe annotations in J3. So it is normal that you can not see your Java annotations inside the LLVM bytecode produced. If I remember well, our implementation of annotations do not rely on LLVM annotations. Regards, Harris Bakiras On 06/17/2013 02:19 PM, Alexandru Ionut Diaconescu wrote:> Hello everyone, > > I am able to work very well with annotations in C/C++, by using > __attribute__((annotate("MYANNOTATION"))) static int a; . Inside the > LLVM bytecode I have @llvm.global.annotations and @llvm.var.annotation. > > However, I was trying to test annotations also in Java, with VMKit. > These are the commands that I run: > > javac -Xlint -g -O Main.java > ../Release+Asserts/bin/vmjc Main > ../Release+Asserts/bin/j3 Main > ../../llvm_new/Release+Asserts/bin/llvm-dis < Main.bc > Main_assembly > > My small program is : > > import java.lang.annotation.ElementType; > import java.lang.annotation.Retention; > import java.lang.annotation.RetentionPolicy; > import java.lang.annotation.Target; > import java.lang.reflect.Method; > > @Target(ElementType.METHOD) > @Retention(RetentionPolicy.RUNTIME) > @interface Red { > String info() default ""; > } > > > class Annotated { > @Red(info = "AWESOME") > public void foo(String myParam) { > System.out.println("This is " + myParam); > } > } > > > class TestAnnotationParser { > public void parse(Class clazz) throws Exception { > Method[] methods = clazz.getMethods(); > > > > for (Method method : methods) { > if (method.isAnnotationPresent(Red.class)) { > Red test = method.getAnnotation(Red.class); > String info = test.info <http://test.info>(); > > if ("AWESOME".equals(info)) { > System.out.println("info is awesome!"); > // try to invoke the method with param > method.invoke( > Annotated.class.newInstance(), > info > ); > } > } > } > } > > > } > > > public class Main { > public static void main(String[] args) throws Exception { > TestAnnotationParser parser = new TestAnnotationParser(); > parser.parse(Annotated.class); > } > } > > > However, I cannot find the annotations in the bytecode. It is > something that I did wrong? > > Thank you in advance ! > > > > _______________________________________________ > LLVM Developers mailing list > LLVMdev at cs.uiuc.edu http://llvm.cs.uiuc.edu > http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev-------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20130617/0bd41412/attachment.html>
Hello Harris, Thank you for your answer. So it is there a way of annotating variables in Java Code, so I can see them into LLVM bytecode? Thank you ! On Mon, Jun 17, 2013 at 3:54 PM, Harris BAKIRAS <h.bakiras at gmail.com> wrote:> Hello Alexandru, > > No you did nothing wrong. > > We are using our own data structure to describe annotations in J3. So it > is normal that you can not see your Java annotations inside the LLVM > bytecode produced. > If I remember well, our implementation of annotations do not rely on LLVM > annotations. > > Regards, > > Harris Bakiras > > On 06/17/2013 02:19 PM, Alexandru Ionut Diaconescu wrote: > > Hello everyone, > > I am able to work very well with annotations in C/C++, by using > __attribute__((annotate("MYANNOTATION"))) static int a; . Inside the LLVM > bytecode I have @llvm.global.annotations and @llvm.var.annotation. > > However, I was trying to test annotations also in Java, with VMKit. These > are the commands that I run: > > javac -Xlint -g -O Main.java > ../Release+Asserts/bin/vmjc Main > ../Release+Asserts/bin/j3 Main > ../../llvm_new/Release+Asserts/bin/llvm-dis < Main.bc > Main_assembly > > My small program is : > > import java.lang.annotation.ElementType; > import java.lang.annotation.Retention; > import java.lang.annotation.RetentionPolicy; > import java.lang.annotation.Target; > import java.lang.reflect.Method; > > @Target(ElementType.METHOD) > @Retention(RetentionPolicy.RUNTIME) > @interface Red { > String info() default ""; > } > > > class Annotated { > @Red(info = "AWESOME") > public void foo(String myParam) { > System.out.println("This is " + myParam); > } > } > > > class TestAnnotationParser { > public void parse(Class clazz) throws Exception { > Method[] methods = clazz.getMethods(); > > > > for (Method method : methods) { > if (method.isAnnotationPresent(Red.class)) { > Red test = method.getAnnotation(Red.class); > String info = test.info(); > > if ("AWESOME".equals(info)) { > System.out.println("info is awesome!"); > // try to invoke the method with param > method.invoke( > Annotated.class.newInstance(), > info > ); > } > } > } > } > > > } > > > public class Main { > public static void main(String[] args) throws Exception { > TestAnnotationParser parser = new TestAnnotationParser(); > parser.parse(Annotated.class); > } > } > > > However, I cannot find the annotations in the bytecode. It is something > that I did wrong? > > Thank you in advance ! > > > > _______________________________________________ > LLVM Developers mailing listLLVMdev at cs.uiuc.edu http://llvm.cs.uiuc.eduhttp://lists.cs.uiuc.edu/mailman/listinfo/llvmdev > > >-- Best regards, Alexandru Ionut Diaconescu -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20130617/75f7e6e8/attachment.html>