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Posted to user@commons.apache.org by Hiroshi Yamauchi <ya...@google.com> on 2009/08/18 02:15:35 UTC
[JAVAFLOW] Running a Javaflow example
Hi,
I'm trying to run a javaflow example code. But it's been unsuccessful so far.
I'm basically following this blog post:
http://blogs.sun.com/sundararajan/entry/continuations_for_java
I built javaflow-1.0-SNAPSHOT.jar using maven and downloaded
commons-logging-1.1.1.jar and asm-all-3.2.jar.
Here's what I did:
$ cat Test.java
import org.apache.commons.javaflow.*;
class Test {
static class MyRunnable implements Runnable {
public void run() {
System.out.println("run started!");
for( int i=0; i < 10; i++ ) {
echo(i);
}
}
private void echo(int x) {
System.out.println("echo " + x);
Continuation.suspend();
}
}
public static void main(String[] args) {
System.out.println("main started");
Continuation c = Continuation.startWith(new MyRunnable());
System.out.println("in main after continuation return");
while (c != null) {
c = Continuation.continueWith(c);
System.out.println("in main");
}
}
}
$ javac -cp ../target/javaflow-1.0-SNAPSHOT.jar Test.java
$ jar cvf Test.jar Test.class Test\$MyRunnable.class
added manifest
adding: Test.class(in = 882) (out= 516)(deflated 41%)
adding: Test$MyRunnable.class(in = 903) (out= 563)(deflated 37%)
$ java -cp ../target/javaflow-1.0-SNAPSHOT.jar:../lib/commons-logging-1.1.1.jar:../lib/asm-all-3.2.jar
org.apache.commons.javaflow.utils.RewritingUtils Test.jar
Test-instrumented.jar
rewriting Test.jar
org.objectweb.asm.tree.analysis.AnalyzerException: Error at
instruction 8: Cannot pop operand off an empty stack.
at org.objectweb.asm.tree.analysis.Analyzer.analyze(Unknown Source)
at org.apache.commons.javaflow.bytecode.transformation.asm.ContinuationMethodAnalyzer$2.analyze(ContinuationMethodAnalyzer.java:124)
at org.apache.commons.javaflow.bytecode.transformation.asm.ContinuationMethodAnalyzer.visitEnd(ContinuationMethodAnalyzer.java:135)
at org.objectweb.asm.ClassReader.accept(Unknown Source)
at org.objectweb.asm.ClassReader.accept(Unknown Source)
at org.apache.commons.javaflow.bytecode.transformation.asm.AsmClassTransformer.transform(AsmClassTransformer.java:53)
at org.apache.commons.javaflow.bytecode.transformation.asm.AsmClassTransformer.transform(AsmClassTransformer.java:40)
at org.apache.commons.javaflow.utils.RewritingUtils.rewriteJar(RewritingUtils.java:108)
at org.apache.commons.javaflow.utils.RewritingUtils.rewriteJar(RewritingUtils.java:71)
at org.apache.commons.javaflow.utils.RewritingUtils.main(RewritingUtils.java:181)
Caused by: java.lang.IndexOutOfBoundsException: Cannot pop operand off
an empty stack.
at org.objectweb.asm.tree.analysis.Frame.pop(Unknown Source)
at org.objectweb.asm.tree.analysis.Frame.execute(Unknown Source)
at org.apache.commons.javaflow.bytecode.transformation.asm.MonitoringFrame.execute(MonitoringFrame.java:70)
... 10 more
org.objectweb.asm.tree.analysis.AnalyzerException: Error at
instruction 8: Cannot pop operand off an empty stack.
at org.objectweb.asm.tree.analysis.Analyzer.analyze(Unknown Source)
at org.objectweb.asm.util.CheckMethodAdapter$1.visitEnd(Unknown Source)
at org.objectweb.asm.util.CheckMethodAdapter.visitEnd(Unknown Source)
at org.objectweb.asm.tree.MethodNode.accept(Unknown Source)
at org.apache.commons.javaflow.bytecode.transformation.asm.ContinuationMethodAnalyzer.visitEnd(ContinuationMethodAnalyzer.java:141)
at org.objectweb.asm.ClassReader.accept(Unknown Source)
at org.objectweb.asm.ClassReader.accept(Unknown Source)
at org.apache.commons.javaflow.bytecode.transformation.asm.AsmClassTransformer.transform(AsmClassTransformer.java:53)
at org.apache.commons.javaflow.bytecode.transformation.asm.AsmClassTransformer.transform(AsmClassTransformer.java:40)
at org.apache.commons.javaflow.utils.RewritingUtils.rewriteJar(RewritingUtils.java:108)
at org.apache.commons.javaflow.utils.RewritingUtils.rewriteJar(RewritingUtils.java:71)
at org.apache.commons.javaflow.utils.RewritingUtils.main(RewritingUtils.java:181)
Caused by: java.lang.IndexOutOfBoundsException: Cannot pop operand off
an empty stack.
at org.objectweb.asm.tree.analysis.Frame.pop(Unknown Source)
at org.objectweb.asm.tree.analysis.Frame.execute(Unknown Source)
... 12 more
Exception in thread "main" java.lang.RuntimeException: Error at
instruction 8: Cannot pop operand off an empty stack.
main([Ljava/lang/String;)V
00000 R . : : L0
00001 R . : : LINENUMBER 19 L0
00002 R . : : GETSTATIC java/lang/System.out : Ljava/io/PrintStream;
00003 R . : R : LDC "main started"
00004 R . : R R : L1
00005 R . : R R : INVOKEVIRTUAL java/io/PrintStream.println
(Ljava/lang/String;)V
00006 R . : : L2
00007 R . : : LINENUMBER 20 L2
00008 R . : : INVOKESPECIAL Test$MyRunnable.<init> ()V
00009 ? : NEW Test$MyRunnable
00010 ? : DUP
00011 ? : L3
00012 ? : INVOKESTATIC
org/apache/commons/javaflow/Continuation.startWith
(Ljava/lang/Runnable;)Lorg/apache/commons/javaflow/Continuation;
00013 ? : ASTORE 1
00014 ? : L4
00015 ? : LINENUMBER 21 L4
00016 ? : GETSTATIC java/lang/System.out : Ljava/io/PrintStream;
00017 ? : LDC "in main after continuation return"
00018 ? : L5
00019 ? : INVOKEVIRTUAL java/io/PrintStream.println
(Ljava/lang/String;)V
00020 ? : L6
00021 ? : LINENUMBER 22 L6
00022 ? : FRAME APPEND [org/apache/commons/javaflow/Continuation]
00023 ? : ALOAD 1
00024 ? : IFNULL L7
00025 ? : L8
00026 ? : LINENUMBER 23 L8
00027 ? : ALOAD 1
00028 ? : L9
00029 ? : INVOKESTATIC
org/apache/commons/javaflow/Continuation.continueWith
(Lorg/apache/commons/javaflow/Continuation;)Lorg/apache/commons/javaflow/Continuation;
00030 ? : ASTORE 1
00031 ? : L10
00032 ? : LINENUMBER 24 L10
00033 ? : GETSTATIC java/lang/System.out : Ljava/io/PrintStream;
00034 ? : LDC "in main"
00035 ? : L11
00036 ? : INVOKEVIRTUAL java/io/PrintStream.println
(Ljava/lang/String;)V
00037 ? : GOTO L6
00038 ? : L7
00039 ? : LINENUMBER 26 L7
00040 ? : FRAME SAME
00041 ? : RETURN
at org.objectweb.asm.util.CheckMethodAdapter$1.visitEnd(Unknown Source)
at org.objectweb.asm.util.CheckMethodAdapter.visitEnd(Unknown Source)
at org.objectweb.asm.tree.MethodNode.accept(Unknown Source)
at org.apache.commons.javaflow.bytecode.transformation.asm.ContinuationMethodAnalyzer.visitEnd(ContinuationMethodAnalyzer.java:141)
at org.objectweb.asm.ClassReader.accept(Unknown Source)
at org.objectweb.asm.ClassReader.accept(Unknown Source)
at org.apache.commons.javaflow.bytecode.transformation.asm.AsmClassTransformer.transform(AsmClassTransformer.java:53)
at org.apache.commons.javaflow.bytecode.transformation.asm.AsmClassTransformer.transform(AsmClassTransformer.java:40)
at org.apache.commons.javaflow.utils.RewritingUtils.rewriteJar(RewritingUtils.java:108)
at org.apache.commons.javaflow.utils.RewritingUtils.rewriteJar(RewritingUtils.java:71)
at org.apache.commons.javaflow.utils.RewritingUtils.main(RewritingUtils.java:181)
Can someone advise how to get this working?
Thanks,
Hiroshi
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Re: [JAVAFLOW] Running a Javaflow example
Posted by Valery Silaev <vs...@gmail.com>.
I've mailed him and he promised to take a look when he will have time.
Meanwhile he suggested me to contact ASM mailing list and ask for assistance
there.
However, it seems I've found smth. interesting.
Torsten, could you please quickly take a look at the following diff:
http://svn.apache.org/viewvc/commons/sandbox/javaflow/trunk/src/main/java/org/apache/commons/javaflow/bytecode/transformation/asm/ContinuationMethodAdapter.java?r1=733503&r2=733955&diff_format=h
most importantly, at lines 93-97 and 185-190.
As far as I understand, field "analyzer" is an analyzer constructed by
original bytecode, and "canalyzer" is the one created for instrumented
(partly instrumented???) bytecode.
And it seems that logic of "indexed access" is changed during transition to
ASM 3.1...
Probably this is just a tiny bug that can be easily fixed?
Torsten Curdt-3 wrote:
>
>
>> Btw, is Eugen still participate in Javaflow project? Need fix for this
>> bug
>> too, but JVM bytecode is a Greek for me...
>
> Feel free to ping him ;) but I think pretty much everyone has moved
> on. The project needs a new driver that speaks "Greek" ;)
>
> cheers
> --
> Torsten
>
> ---------------------------------------------------------------------
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>
>
>
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Re: [JAVAFLOW] Running a Javaflow example
Posted by Torsten Curdt <tc...@vafer.org>.
> The issue is related with constructor invocation in method instrumented by
> AsmClassTransformer (problem does not exists with BcelClassTransformer)
Yepp
> Btw, is Eugen still participate in Javaflow project? Need fix for this bug
> too, but JVM bytecode is a Greek for me...
Feel free to ping him ;) but I think pretty much everyone has moved
on. The project needs a new driver that speaks "Greek" ;)
cheers
--
Torsten
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Re: [JAVAFLOW] Running a Javaflow example
Posted by Valery Silaev <vs...@gmail.com>.
This is not a problem of ASM version, I've hit the same bug:
http://issues.apache.org/jira/browse/SANDBOX-318
The issue is related with constructor invocation in method instrumented by
AsmClassTransformer (problem does not exists with BcelClassTransformer)
> >> private void echo(int x) {
> >> System.out.println("echo " + x);
> >> Continuation.suspend();
> >> }
"echo " + x is causing the creation of StringBuilder object:
new StringBuilder("echo ").append(x);
As an ugly workaround, method may be rewritten as this:
private void echo(int x) {
System.out.println(join("echo ", x));
Continuation.suspend();
}
private String join(String prefix, int o) { return prefix + o; }
Btw, is Eugen still participate in Javaflow project? Need fix for this bug
too, but JVM bytecode is a Greek for me...
Jin Mingjian wrote:
>
> get the older archive? why not use the asm version?
>
> regards,
> Jin
>
>
>
> 2009/9/1 Hiroshi Yamauchi <ya...@google.com>
>
>> Hi Torsten,
>>
>> How do I use BCEL from javaflow, or how do I get the BCEL based javaflow?
>>
>> Thanks,
>>
>> Hiroshi
>>
>> On Sun, Aug 23, 2009 at 10:10 AM, Torsten Curdt<tc...@apache.org> wrote:
>> > In the latest trunk javaflow switched to use the ASM engine instead of
>> > the BCEL one by default. There is still some work to do. But maybe
>> > give the BCEL one a try.
>> >
>> > cheers
>> > --
>> > Torsten
>> >
>> > On Tue, Aug 18, 2009 at 02:15, Hiroshi Yamauchi<ya...@google.com>
>> wrote:
>> >> Hi,
>> >>
>> >> I'm trying to run a javaflow example code. But it's been unsuccessful
>> so
>> far.
>> >>
>> >> I'm basically following this blog post:
>> >> http://blogs.sun.com/sundararajan/entry/continuations_for_java
>> >>
>> >> I built javaflow-1.0-SNAPSHOT.jar using maven and downloaded
>> >> commons-logging-1.1.1.jar and asm-all-3.2.jar.
>> >>
>> >> Here's what I did:
>> >>
>> >> $ cat Test.java
>> >> import org.apache.commons.javaflow.*;
>> >>
>> >> class Test {
>> >> static class MyRunnable implements Runnable {
>> >> public void run() {
>> >> System.out.println("run started!");
>> >> for( int i=0; i < 10; i++ ) {
>> >> echo(i);
>> >> }
>> >> }
>> >>
>> >> private void echo(int x) {
>> >> System.out.println("echo " + x);
>> >> Continuation.suspend();
>> >> }
>> >> }
>> >>
>> >> public static void main(String[] args) {
>> >> System.out.println("main started");
>> >> Continuation c = Continuation.startWith(new MyRunnable());
>> >> System.out.println("in main after continuation return");
>> >> while (c != null) {
>> >> c = Continuation.continueWith(c);
>> >> System.out.println("in main");
>> >> }
>> >> }
>> >> }
>> >> $ javac -cp ../target/javaflow-1.0-SNAPSHOT.jar Test.java
>> >> $ jar cvf Test.jar Test.class Test\$MyRunnable.class
>> >> added manifest
>> >> adding: Test.class(in = 882) (out= 516)(deflated 41%)
>> >> adding: Test$MyRunnable.class(in = 903) (out= 563)(deflated 37%)
>> >> $ java -cp
>> ../target/javaflow-1.0-SNAPSHOT.jar:../lib/commons-logging-1.1.1.jar:../lib/asm-all-3.2.jar
>> >> org.apache.commons.javaflow.utils.RewritingUtils Test.jar
>> >> Test-instrumented.jar
>> >> rewriting Test.jar
>> >> org.objectweb.asm.tree.analysis.AnalyzerException: Error at
>> >> instruction 8: Cannot pop operand off an empty stack.
>> >> at org.objectweb.asm.tree.analysis.Analyzer.analyze(Unknown
>> Source)
>> >> at
>> org.apache.commons.javaflow.bytecode.transformation.asm.ContinuationMethodAnalyzer$2.analyze(ContinuationMethodAnalyzer.java:124)
>> >> at
>> org.apache.commons.javaflow.bytecode.transformation.asm.ContinuationMethodAnalyzer.visitEnd(ContinuationMethodAnalyzer.java:135)
>> >> at org.objectweb.asm.ClassReader.accept(Unknown Source)
>> >> at org.objectweb.asm.ClassReader.accept(Unknown Source)
>> >> at
>> org.apache.commons.javaflow.bytecode.transformation.asm.AsmClassTransformer.transform(AsmClassTransformer.java:53)
>> >> at
>> org.apache.commons.javaflow.bytecode.transformation.asm.AsmClassTransformer.transform(AsmClassTransformer.java:40)
>> >> at
>> org.apache.commons.javaflow.utils.RewritingUtils.rewriteJar(RewritingUtils.java:108)
>> >> at
>> org.apache.commons.javaflow.utils.RewritingUtils.rewriteJar(RewritingUtils.java:71)
>> >> at
>> org.apache.commons.javaflow.utils.RewritingUtils.main(RewritingUtils.java:181)
>> >> Caused by: java.lang.IndexOutOfBoundsException: Cannot pop operand off
>> >> an empty stack.
>> >> at org.objectweb.asm.tree.analysis.Frame.pop(Unknown Source)
>> >> at org.objectweb.asm.tree.analysis.Frame.execute(Unknown Source)
>> >> at
>> org.apache.commons.javaflow.bytecode.transformation.asm.MonitoringFrame.execute(MonitoringFrame.java:70)
>> >> ... 10 more
>> >> org.objectweb.asm.tree.analysis.AnalyzerException: Error at
>> >> instruction 8: Cannot pop operand off an empty stack.
>> >> at org.objectweb.asm.tree.analysis.Analyzer.analyze(Unknown
>> Source)
>> >> at org.objectweb.asm.util.CheckMethodAdapter$1.visitEnd(Unknown
>> Source)
>> >> at org.objectweb.asm.util.CheckMethodAdapter.visitEnd(Unknown
>> Source)
>> >> at org.objectweb.asm.tree.MethodNode.accept(Unknown Source)
>> >> at
>> org.apache.commons.javaflow.bytecode.transformation.asm.ContinuationMethodAnalyzer.visitEnd(ContinuationMethodAnalyzer.java:141)
>> >> at org.objectweb.asm.ClassReader.accept(Unknown Source)
>> >> at org.objectweb.asm.ClassReader.accept(Unknown Source)
>> >> at
>> org.apache.commons.javaflow.bytecode.transformation.asm.AsmClassTransformer.transform(AsmClassTransformer.java:53)
>> >> at
>> org.apache.commons.javaflow.bytecode.transformation.asm.AsmClassTransformer.transform(AsmClassTransformer.java:40)
>> >> at
>> org.apache.commons.javaflow.utils.RewritingUtils.rewriteJar(RewritingUtils.java:108)
>> >> at
>> org.apache.commons.javaflow.utils.RewritingUtils.rewriteJar(RewritingUtils.java:71)
>> >> at
>> org.apache.commons.javaflow.utils.RewritingUtils.main(RewritingUtils.java:181)
>> >> Caused by: java.lang.IndexOutOfBoundsException: Cannot pop operand off
>> >> an empty stack.
>> >> at org.objectweb.asm.tree.analysis.Frame.pop(Unknown Source)
>> >> at org.objectweb.asm.tree.analysis.Frame.execute(Unknown Source)
>> >> ... 12 more
>> >> Exception in thread "main" java.lang.RuntimeException: Error at
>> >> instruction 8: Cannot pop operand off an empty stack.
>> >> main([Ljava/lang/String;)V
>> >> 00000 R . : : L0
>> >> 00001 R . : : LINENUMBER 19 L0
>> >> 00002 R . : : GETSTATIC java/lang/System.out :
>> Ljava/io/PrintStream;
>> >> 00003 R . : R : LDC "main started"
>> >> 00004 R . : R R : L1
>> >> 00005 R . : R R : INVOKEVIRTUAL java/io/PrintStream.println
>> >> (Ljava/lang/String;)V
>> >> 00006 R . : : L2
>> >> 00007 R . : : LINENUMBER 20 L2
>> >> 00008 R . : : INVOKESPECIAL Test$MyRunnable.<init> ()V
>> >> 00009 ? : NEW Test$MyRunnable
>> >> 00010 ? : DUP
>> >> 00011 ? : L3
>> >> 00012 ? : INVOKESTATIC
>> >> org/apache/commons/javaflow/Continuation.startWith
>> >> (Ljava/lang/Runnable;)Lorg/apache/commons/javaflow/Continuation;
>> >> 00013 ? : ASTORE 1
>> >> 00014 ? : L4
>> >> 00015 ? : LINENUMBER 21 L4
>> >> 00016 ? : GETSTATIC java/lang/System.out :
>> Ljava/io/PrintStream;
>> >> 00017 ? : LDC "in main after continuation return"
>> >> 00018 ? : L5
>> >> 00019 ? : INVOKEVIRTUAL java/io/PrintStream.println
>> >> (Ljava/lang/String;)V
>> >> 00020 ? : L6
>> >> 00021 ? : LINENUMBER 22 L6
>> >> 00022 ? : FRAME APPEND
>> [org/apache/commons/javaflow/Continuation]
>> >> 00023 ? : ALOAD 1
>> >> 00024 ? : IFNULL L7
>> >> 00025 ? : L8
>> >> 00026 ? : LINENUMBER 23 L8
>> >> 00027 ? : ALOAD 1
>> >> 00028 ? : L9
>> >> 00029 ? : INVOKESTATIC
>> >> org/apache/commons/javaflow/Continuation.continueWith
>> >>
>> (Lorg/apache/commons/javaflow/Continuation;)Lorg/apache/commons/javaflow/Continuation;
>> >> 00030 ? : ASTORE 1
>> >> 00031 ? : L10
>> >> 00032 ? : LINENUMBER 24 L10
>> >> 00033 ? : GETSTATIC java/lang/System.out :
>> Ljava/io/PrintStream;
>> >> 00034 ? : LDC "in main"
>> >> 00035 ? : L11
>> >> 00036 ? : INVOKEVIRTUAL java/io/PrintStream.println
>> >> (Ljava/lang/String;)V
>> >> 00037 ? : GOTO L6
>> >> 00038 ? : L7
>> >> 00039 ? : LINENUMBER 26 L7
>> >> 00040 ? : FRAME SAME
>> >> 00041 ? : RETURN
>> >>
>> >>
>> >> at org.objectweb.asm.util.CheckMethodAdapter$1.visitEnd(Unknown
>> Source)
>> >> at org.objectweb.asm.util.CheckMethodAdapter.visitEnd(Unknown
>> Source)
>> >> at org.objectweb.asm.tree.MethodNode.accept(Unknown Source)
>> >> at
>> org.apache.commons.javaflow.bytecode.transformation.asm.ContinuationMethodAnalyzer.visitEnd(ContinuationMethodAnalyzer.java:141)
>> >> at org.objectweb.asm.ClassReader.accept(Unknown Source)
>> >> at org.objectweb.asm.ClassReader.accept(Unknown Source)
>> >> at
>> org.apache.commons.javaflow.bytecode.transformation.asm.AsmClassTransformer.transform(AsmClassTransformer.java:53)
>> >> at
>> org.apache.commons.javaflow.bytecode.transformation.asm.AsmClassTransformer.transform(AsmClassTransformer.java:40)
>> >> at
>> org.apache.commons.javaflow.utils.RewritingUtils.rewriteJar(RewritingUtils.java:108)
>> >> at
>> org.apache.commons.javaflow.utils.RewritingUtils.rewriteJar(RewritingUtils.java:71)
>> >> at
>> org.apache.commons.javaflow.utils.RewritingUtils.main(RewritingUtils.java:181)
>> >>
>> >> Can someone advise how to get this working?
>> >>
>> >> Thanks,
>> >> Hiroshi
>> >>
>> >> ---------------------------------------------------------------------
>> >> To unsubscribe, e-mail: user-unsubscribe@commons.apache.org
>> >> For additional commands, e-mail: user-help@commons.apache.org
>> >>
>> >>
>> >
>> > ---------------------------------------------------------------------
>> > To unsubscribe, e-mail: user-unsubscribe@commons.apache.org
>> > For additional commands, e-mail: user-help@commons.apache.org
>> >
>> >
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: user-unsubscribe@commons.apache.org
>> For additional commands, e-mail: user-help@commons.apache.org
>>
>>
>
>
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Re: [JAVAFLOW] Running a Javaflow example
Posted by Jin Mingjian <ji...@gmail.com>.
get the older archive? why not use the asm version?
regards,
Jin
2009/9/1 Hiroshi Yamauchi <ya...@google.com>
> Hi Torsten,
>
> How do I use BCEL from javaflow, or how do I get the BCEL based javaflow?
>
> Thanks,
>
> Hiroshi
>
> On Sun, Aug 23, 2009 at 10:10 AM, Torsten Curdt<tc...@apache.org> wrote:
> > In the latest trunk javaflow switched to use the ASM engine instead of
> > the BCEL one by default. There is still some work to do. But maybe
> > give the BCEL one a try.
> >
> > cheers
> > --
> > Torsten
> >
> > On Tue, Aug 18, 2009 at 02:15, Hiroshi Yamauchi<ya...@google.com>
> wrote:
> >> Hi,
> >>
> >> I'm trying to run a javaflow example code. But it's been unsuccessful so
> far.
> >>
> >> I'm basically following this blog post:
> >> http://blogs.sun.com/sundararajan/entry/continuations_for_java
> >>
> >> I built javaflow-1.0-SNAPSHOT.jar using maven and downloaded
> >> commons-logging-1.1.1.jar and asm-all-3.2.jar.
> >>
> >> Here's what I did:
> >>
> >> $ cat Test.java
> >> import org.apache.commons.javaflow.*;
> >>
> >> class Test {
> >> static class MyRunnable implements Runnable {
> >> public void run() {
> >> System.out.println("run started!");
> >> for( int i=0; i < 10; i++ ) {
> >> echo(i);
> >> }
> >> }
> >>
> >> private void echo(int x) {
> >> System.out.println("echo " + x);
> >> Continuation.suspend();
> >> }
> >> }
> >>
> >> public static void main(String[] args) {
> >> System.out.println("main started");
> >> Continuation c = Continuation.startWith(new MyRunnable());
> >> System.out.println("in main after continuation return");
> >> while (c != null) {
> >> c = Continuation.continueWith(c);
> >> System.out.println("in main");
> >> }
> >> }
> >> }
> >> $ javac -cp ../target/javaflow-1.0-SNAPSHOT.jar Test.java
> >> $ jar cvf Test.jar Test.class Test\$MyRunnable.class
> >> added manifest
> >> adding: Test.class(in = 882) (out= 516)(deflated 41%)
> >> adding: Test$MyRunnable.class(in = 903) (out= 563)(deflated 37%)
> >> $ java -cp
> ../target/javaflow-1.0-SNAPSHOT.jar:../lib/commons-logging-1.1.1.jar:../lib/asm-all-3.2.jar
> >> org.apache.commons.javaflow.utils.RewritingUtils Test.jar
> >> Test-instrumented.jar
> >> rewriting Test.jar
> >> org.objectweb.asm.tree.analysis.AnalyzerException: Error at
> >> instruction 8: Cannot pop operand off an empty stack.
> >> at org.objectweb.asm.tree.analysis.Analyzer.analyze(Unknown
> Source)
> >> at
> org.apache.commons.javaflow.bytecode.transformation.asm.ContinuationMethodAnalyzer$2.analyze(ContinuationMethodAnalyzer.java:124)
> >> at
> org.apache.commons.javaflow.bytecode.transformation.asm.ContinuationMethodAnalyzer.visitEnd(ContinuationMethodAnalyzer.java:135)
> >> at org.objectweb.asm.ClassReader.accept(Unknown Source)
> >> at org.objectweb.asm.ClassReader.accept(Unknown Source)
> >> at
> org.apache.commons.javaflow.bytecode.transformation.asm.AsmClassTransformer.transform(AsmClassTransformer.java:53)
> >> at
> org.apache.commons.javaflow.bytecode.transformation.asm.AsmClassTransformer.transform(AsmClassTransformer.java:40)
> >> at
> org.apache.commons.javaflow.utils.RewritingUtils.rewriteJar(RewritingUtils.java:108)
> >> at
> org.apache.commons.javaflow.utils.RewritingUtils.rewriteJar(RewritingUtils.java:71)
> >> at
> org.apache.commons.javaflow.utils.RewritingUtils.main(RewritingUtils.java:181)
> >> Caused by: java.lang.IndexOutOfBoundsException: Cannot pop operand off
> >> an empty stack.
> >> at org.objectweb.asm.tree.analysis.Frame.pop(Unknown Source)
> >> at org.objectweb.asm.tree.analysis.Frame.execute(Unknown Source)
> >> at
> org.apache.commons.javaflow.bytecode.transformation.asm.MonitoringFrame.execute(MonitoringFrame.java:70)
> >> ... 10 more
> >> org.objectweb.asm.tree.analysis.AnalyzerException: Error at
> >> instruction 8: Cannot pop operand off an empty stack.
> >> at org.objectweb.asm.tree.analysis.Analyzer.analyze(Unknown
> Source)
> >> at org.objectweb.asm.util.CheckMethodAdapter$1.visitEnd(Unknown
> Source)
> >> at org.objectweb.asm.util.CheckMethodAdapter.visitEnd(Unknown
> Source)
> >> at org.objectweb.asm.tree.MethodNode.accept(Unknown Source)
> >> at
> org.apache.commons.javaflow.bytecode.transformation.asm.ContinuationMethodAnalyzer.visitEnd(ContinuationMethodAnalyzer.java:141)
> >> at org.objectweb.asm.ClassReader.accept(Unknown Source)
> >> at org.objectweb.asm.ClassReader.accept(Unknown Source)
> >> at
> org.apache.commons.javaflow.bytecode.transformation.asm.AsmClassTransformer.transform(AsmClassTransformer.java:53)
> >> at
> org.apache.commons.javaflow.bytecode.transformation.asm.AsmClassTransformer.transform(AsmClassTransformer.java:40)
> >> at
> org.apache.commons.javaflow.utils.RewritingUtils.rewriteJar(RewritingUtils.java:108)
> >> at
> org.apache.commons.javaflow.utils.RewritingUtils.rewriteJar(RewritingUtils.java:71)
> >> at
> org.apache.commons.javaflow.utils.RewritingUtils.main(RewritingUtils.java:181)
> >> Caused by: java.lang.IndexOutOfBoundsException: Cannot pop operand off
> >> an empty stack.
> >> at org.objectweb.asm.tree.analysis.Frame.pop(Unknown Source)
> >> at org.objectweb.asm.tree.analysis.Frame.execute(Unknown Source)
> >> ... 12 more
> >> Exception in thread "main" java.lang.RuntimeException: Error at
> >> instruction 8: Cannot pop operand off an empty stack.
> >> main([Ljava/lang/String;)V
> >> 00000 R . : : L0
> >> 00001 R . : : LINENUMBER 19 L0
> >> 00002 R . : : GETSTATIC java/lang/System.out :
> Ljava/io/PrintStream;
> >> 00003 R . : R : LDC "main started"
> >> 00004 R . : R R : L1
> >> 00005 R . : R R : INVOKEVIRTUAL java/io/PrintStream.println
> >> (Ljava/lang/String;)V
> >> 00006 R . : : L2
> >> 00007 R . : : LINENUMBER 20 L2
> >> 00008 R . : : INVOKESPECIAL Test$MyRunnable.<init> ()V
> >> 00009 ? : NEW Test$MyRunnable
> >> 00010 ? : DUP
> >> 00011 ? : L3
> >> 00012 ? : INVOKESTATIC
> >> org/apache/commons/javaflow/Continuation.startWith
> >> (Ljava/lang/Runnable;)Lorg/apache/commons/javaflow/Continuation;
> >> 00013 ? : ASTORE 1
> >> 00014 ? : L4
> >> 00015 ? : LINENUMBER 21 L4
> >> 00016 ? : GETSTATIC java/lang/System.out : Ljava/io/PrintStream;
> >> 00017 ? : LDC "in main after continuation return"
> >> 00018 ? : L5
> >> 00019 ? : INVOKEVIRTUAL java/io/PrintStream.println
> >> (Ljava/lang/String;)V
> >> 00020 ? : L6
> >> 00021 ? : LINENUMBER 22 L6
> >> 00022 ? : FRAME APPEND [org/apache/commons/javaflow/Continuation]
> >> 00023 ? : ALOAD 1
> >> 00024 ? : IFNULL L7
> >> 00025 ? : L8
> >> 00026 ? : LINENUMBER 23 L8
> >> 00027 ? : ALOAD 1
> >> 00028 ? : L9
> >> 00029 ? : INVOKESTATIC
> >> org/apache/commons/javaflow/Continuation.continueWith
> >>
> (Lorg/apache/commons/javaflow/Continuation;)Lorg/apache/commons/javaflow/Continuation;
> >> 00030 ? : ASTORE 1
> >> 00031 ? : L10
> >> 00032 ? : LINENUMBER 24 L10
> >> 00033 ? : GETSTATIC java/lang/System.out : Ljava/io/PrintStream;
> >> 00034 ? : LDC "in main"
> >> 00035 ? : L11
> >> 00036 ? : INVOKEVIRTUAL java/io/PrintStream.println
> >> (Ljava/lang/String;)V
> >> 00037 ? : GOTO L6
> >> 00038 ? : L7
> >> 00039 ? : LINENUMBER 26 L7
> >> 00040 ? : FRAME SAME
> >> 00041 ? : RETURN
> >>
> >>
> >> at org.objectweb.asm.util.CheckMethodAdapter$1.visitEnd(Unknown
> Source)
> >> at org.objectweb.asm.util.CheckMethodAdapter.visitEnd(Unknown
> Source)
> >> at org.objectweb.asm.tree.MethodNode.accept(Unknown Source)
> >> at
> org.apache.commons.javaflow.bytecode.transformation.asm.ContinuationMethodAnalyzer.visitEnd(ContinuationMethodAnalyzer.java:141)
> >> at org.objectweb.asm.ClassReader.accept(Unknown Source)
> >> at org.objectweb.asm.ClassReader.accept(Unknown Source)
> >> at
> org.apache.commons.javaflow.bytecode.transformation.asm.AsmClassTransformer.transform(AsmClassTransformer.java:53)
> >> at
> org.apache.commons.javaflow.bytecode.transformation.asm.AsmClassTransformer.transform(AsmClassTransformer.java:40)
> >> at
> org.apache.commons.javaflow.utils.RewritingUtils.rewriteJar(RewritingUtils.java:108)
> >> at
> org.apache.commons.javaflow.utils.RewritingUtils.rewriteJar(RewritingUtils.java:71)
> >> at
> org.apache.commons.javaflow.utils.RewritingUtils.main(RewritingUtils.java:181)
> >>
> >> Can someone advise how to get this working?
> >>
> >> Thanks,
> >> Hiroshi
> >>
> >> ---------------------------------------------------------------------
> >> To unsubscribe, e-mail: user-unsubscribe@commons.apache.org
> >> For additional commands, e-mail: user-help@commons.apache.org
> >>
> >>
> >
> > ---------------------------------------------------------------------
> > To unsubscribe, e-mail: user-unsubscribe@commons.apache.org
> > For additional commands, e-mail: user-help@commons.apache.org
> >
> >
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: user-unsubscribe@commons.apache.org
> For additional commands, e-mail: user-help@commons.apache.org
>
>
Re: [JAVAFLOW] Running a Javaflow example
Posted by Hiroshi Yamauchi <ya...@google.com>.
Hi Torsten,
How do I use BCEL from javaflow, or how do I get the BCEL based javaflow?
Thanks,
Hiroshi
On Sun, Aug 23, 2009 at 10:10 AM, Torsten Curdt<tc...@apache.org> wrote:
> In the latest trunk javaflow switched to use the ASM engine instead of
> the BCEL one by default. There is still some work to do. But maybe
> give the BCEL one a try.
>
> cheers
> --
> Torsten
>
> On Tue, Aug 18, 2009 at 02:15, Hiroshi Yamauchi<ya...@google.com> wrote:
>> Hi,
>>
>> I'm trying to run a javaflow example code. But it's been unsuccessful so far.
>>
>> I'm basically following this blog post:
>> http://blogs.sun.com/sundararajan/entry/continuations_for_java
>>
>> I built javaflow-1.0-SNAPSHOT.jar using maven and downloaded
>> commons-logging-1.1.1.jar and asm-all-3.2.jar.
>>
>> Here's what I did:
>>
>> $ cat Test.java
>> import org.apache.commons.javaflow.*;
>>
>> class Test {
>> static class MyRunnable implements Runnable {
>> public void run() {
>> System.out.println("run started!");
>> for( int i=0; i < 10; i++ ) {
>> echo(i);
>> }
>> }
>>
>> private void echo(int x) {
>> System.out.println("echo " + x);
>> Continuation.suspend();
>> }
>> }
>>
>> public static void main(String[] args) {
>> System.out.println("main started");
>> Continuation c = Continuation.startWith(new MyRunnable());
>> System.out.println("in main after continuation return");
>> while (c != null) {
>> c = Continuation.continueWith(c);
>> System.out.println("in main");
>> }
>> }
>> }
>> $ javac -cp ../target/javaflow-1.0-SNAPSHOT.jar Test.java
>> $ jar cvf Test.jar Test.class Test\$MyRunnable.class
>> added manifest
>> adding: Test.class(in = 882) (out= 516)(deflated 41%)
>> adding: Test$MyRunnable.class(in = 903) (out= 563)(deflated 37%)
>> $ java -cp ../target/javaflow-1.0-SNAPSHOT.jar:../lib/commons-logging-1.1.1.jar:../lib/asm-all-3.2.jar
>> org.apache.commons.javaflow.utils.RewritingUtils Test.jar
>> Test-instrumented.jar
>> rewriting Test.jar
>> org.objectweb.asm.tree.analysis.AnalyzerException: Error at
>> instruction 8: Cannot pop operand off an empty stack.
>> at org.objectweb.asm.tree.analysis.Analyzer.analyze(Unknown Source)
>> at org.apache.commons.javaflow.bytecode.transformation.asm.ContinuationMethodAnalyzer$2.analyze(ContinuationMethodAnalyzer.java:124)
>> at org.apache.commons.javaflow.bytecode.transformation.asm.ContinuationMethodAnalyzer.visitEnd(ContinuationMethodAnalyzer.java:135)
>> at org.objectweb.asm.ClassReader.accept(Unknown Source)
>> at org.objectweb.asm.ClassReader.accept(Unknown Source)
>> at org.apache.commons.javaflow.bytecode.transformation.asm.AsmClassTransformer.transform(AsmClassTransformer.java:53)
>> at org.apache.commons.javaflow.bytecode.transformation.asm.AsmClassTransformer.transform(AsmClassTransformer.java:40)
>> at org.apache.commons.javaflow.utils.RewritingUtils.rewriteJar(RewritingUtils.java:108)
>> at org.apache.commons.javaflow.utils.RewritingUtils.rewriteJar(RewritingUtils.java:71)
>> at org.apache.commons.javaflow.utils.RewritingUtils.main(RewritingUtils.java:181)
>> Caused by: java.lang.IndexOutOfBoundsException: Cannot pop operand off
>> an empty stack.
>> at org.objectweb.asm.tree.analysis.Frame.pop(Unknown Source)
>> at org.objectweb.asm.tree.analysis.Frame.execute(Unknown Source)
>> at org.apache.commons.javaflow.bytecode.transformation.asm.MonitoringFrame.execute(MonitoringFrame.java:70)
>> ... 10 more
>> org.objectweb.asm.tree.analysis.AnalyzerException: Error at
>> instruction 8: Cannot pop operand off an empty stack.
>> at org.objectweb.asm.tree.analysis.Analyzer.analyze(Unknown Source)
>> at org.objectweb.asm.util.CheckMethodAdapter$1.visitEnd(Unknown Source)
>> at org.objectweb.asm.util.CheckMethodAdapter.visitEnd(Unknown Source)
>> at org.objectweb.asm.tree.MethodNode.accept(Unknown Source)
>> at org.apache.commons.javaflow.bytecode.transformation.asm.ContinuationMethodAnalyzer.visitEnd(ContinuationMethodAnalyzer.java:141)
>> at org.objectweb.asm.ClassReader.accept(Unknown Source)
>> at org.objectweb.asm.ClassReader.accept(Unknown Source)
>> at org.apache.commons.javaflow.bytecode.transformation.asm.AsmClassTransformer.transform(AsmClassTransformer.java:53)
>> at org.apache.commons.javaflow.bytecode.transformation.asm.AsmClassTransformer.transform(AsmClassTransformer.java:40)
>> at org.apache.commons.javaflow.utils.RewritingUtils.rewriteJar(RewritingUtils.java:108)
>> at org.apache.commons.javaflow.utils.RewritingUtils.rewriteJar(RewritingUtils.java:71)
>> at org.apache.commons.javaflow.utils.RewritingUtils.main(RewritingUtils.java:181)
>> Caused by: java.lang.IndexOutOfBoundsException: Cannot pop operand off
>> an empty stack.
>> at org.objectweb.asm.tree.analysis.Frame.pop(Unknown Source)
>> at org.objectweb.asm.tree.analysis.Frame.execute(Unknown Source)
>> ... 12 more
>> Exception in thread "main" java.lang.RuntimeException: Error at
>> instruction 8: Cannot pop operand off an empty stack.
>> main([Ljava/lang/String;)V
>> 00000 R . : : L0
>> 00001 R . : : LINENUMBER 19 L0
>> 00002 R . : : GETSTATIC java/lang/System.out : Ljava/io/PrintStream;
>> 00003 R . : R : LDC "main started"
>> 00004 R . : R R : L1
>> 00005 R . : R R : INVOKEVIRTUAL java/io/PrintStream.println
>> (Ljava/lang/String;)V
>> 00006 R . : : L2
>> 00007 R . : : LINENUMBER 20 L2
>> 00008 R . : : INVOKESPECIAL Test$MyRunnable.<init> ()V
>> 00009 ? : NEW Test$MyRunnable
>> 00010 ? : DUP
>> 00011 ? : L3
>> 00012 ? : INVOKESTATIC
>> org/apache/commons/javaflow/Continuation.startWith
>> (Ljava/lang/Runnable;)Lorg/apache/commons/javaflow/Continuation;
>> 00013 ? : ASTORE 1
>> 00014 ? : L4
>> 00015 ? : LINENUMBER 21 L4
>> 00016 ? : GETSTATIC java/lang/System.out : Ljava/io/PrintStream;
>> 00017 ? : LDC "in main after continuation return"
>> 00018 ? : L5
>> 00019 ? : INVOKEVIRTUAL java/io/PrintStream.println
>> (Ljava/lang/String;)V
>> 00020 ? : L6
>> 00021 ? : LINENUMBER 22 L6
>> 00022 ? : FRAME APPEND [org/apache/commons/javaflow/Continuation]
>> 00023 ? : ALOAD 1
>> 00024 ? : IFNULL L7
>> 00025 ? : L8
>> 00026 ? : LINENUMBER 23 L8
>> 00027 ? : ALOAD 1
>> 00028 ? : L9
>> 00029 ? : INVOKESTATIC
>> org/apache/commons/javaflow/Continuation.continueWith
>> (Lorg/apache/commons/javaflow/Continuation;)Lorg/apache/commons/javaflow/Continuation;
>> 00030 ? : ASTORE 1
>> 00031 ? : L10
>> 00032 ? : LINENUMBER 24 L10
>> 00033 ? : GETSTATIC java/lang/System.out : Ljava/io/PrintStream;
>> 00034 ? : LDC "in main"
>> 00035 ? : L11
>> 00036 ? : INVOKEVIRTUAL java/io/PrintStream.println
>> (Ljava/lang/String;)V
>> 00037 ? : GOTO L6
>> 00038 ? : L7
>> 00039 ? : LINENUMBER 26 L7
>> 00040 ? : FRAME SAME
>> 00041 ? : RETURN
>>
>>
>> at org.objectweb.asm.util.CheckMethodAdapter$1.visitEnd(Unknown Source)
>> at org.objectweb.asm.util.CheckMethodAdapter.visitEnd(Unknown Source)
>> at org.objectweb.asm.tree.MethodNode.accept(Unknown Source)
>> at org.apache.commons.javaflow.bytecode.transformation.asm.ContinuationMethodAnalyzer.visitEnd(ContinuationMethodAnalyzer.java:141)
>> at org.objectweb.asm.ClassReader.accept(Unknown Source)
>> at org.objectweb.asm.ClassReader.accept(Unknown Source)
>> at org.apache.commons.javaflow.bytecode.transformation.asm.AsmClassTransformer.transform(AsmClassTransformer.java:53)
>> at org.apache.commons.javaflow.bytecode.transformation.asm.AsmClassTransformer.transform(AsmClassTransformer.java:40)
>> at org.apache.commons.javaflow.utils.RewritingUtils.rewriteJar(RewritingUtils.java:108)
>> at org.apache.commons.javaflow.utils.RewritingUtils.rewriteJar(RewritingUtils.java:71)
>> at org.apache.commons.javaflow.utils.RewritingUtils.main(RewritingUtils.java:181)
>>
>> Can someone advise how to get this working?
>>
>> Thanks,
>> Hiroshi
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: user-unsubscribe@commons.apache.org
>> For additional commands, e-mail: user-help@commons.apache.org
>>
>>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: user-unsubscribe@commons.apache.org
> For additional commands, e-mail: user-help@commons.apache.org
>
>
---------------------------------------------------------------------
To unsubscribe, e-mail: user-unsubscribe@commons.apache.org
For additional commands, e-mail: user-help@commons.apache.org
Re: [JAVAFLOW] Running a Javaflow example
Posted by Torsten Curdt <tc...@apache.org>.
In the latest trunk javaflow switched to use the ASM engine instead of
the BCEL one by default. There is still some work to do. But maybe
give the BCEL one a try.
cheers
--
Torsten
On Tue, Aug 18, 2009 at 02:15, Hiroshi Yamauchi<ya...@google.com> wrote:
> Hi,
>
> I'm trying to run a javaflow example code. But it's been unsuccessful so far.
>
> I'm basically following this blog post:
> http://blogs.sun.com/sundararajan/entry/continuations_for_java
>
> I built javaflow-1.0-SNAPSHOT.jar using maven and downloaded
> commons-logging-1.1.1.jar and asm-all-3.2.jar.
>
> Here's what I did:
>
> $ cat Test.java
> import org.apache.commons.javaflow.*;
>
> class Test {
> static class MyRunnable implements Runnable {
> public void run() {
> System.out.println("run started!");
> for( int i=0; i < 10; i++ ) {
> echo(i);
> }
> }
>
> private void echo(int x) {
> System.out.println("echo " + x);
> Continuation.suspend();
> }
> }
>
> public static void main(String[] args) {
> System.out.println("main started");
> Continuation c = Continuation.startWith(new MyRunnable());
> System.out.println("in main after continuation return");
> while (c != null) {
> c = Continuation.continueWith(c);
> System.out.println("in main");
> }
> }
> }
> $ javac -cp ../target/javaflow-1.0-SNAPSHOT.jar Test.java
> $ jar cvf Test.jar Test.class Test\$MyRunnable.class
> added manifest
> adding: Test.class(in = 882) (out= 516)(deflated 41%)
> adding: Test$MyRunnable.class(in = 903) (out= 563)(deflated 37%)
> $ java -cp ../target/javaflow-1.0-SNAPSHOT.jar:../lib/commons-logging-1.1.1.jar:../lib/asm-all-3.2.jar
> org.apache.commons.javaflow.utils.RewritingUtils Test.jar
> Test-instrumented.jar
> rewriting Test.jar
> org.objectweb.asm.tree.analysis.AnalyzerException: Error at
> instruction 8: Cannot pop operand off an empty stack.
> at org.objectweb.asm.tree.analysis.Analyzer.analyze(Unknown Source)
> at org.apache.commons.javaflow.bytecode.transformation.asm.ContinuationMethodAnalyzer$2.analyze(ContinuationMethodAnalyzer.java:124)
> at org.apache.commons.javaflow.bytecode.transformation.asm.ContinuationMethodAnalyzer.visitEnd(ContinuationMethodAnalyzer.java:135)
> at org.objectweb.asm.ClassReader.accept(Unknown Source)
> at org.objectweb.asm.ClassReader.accept(Unknown Source)
> at org.apache.commons.javaflow.bytecode.transformation.asm.AsmClassTransformer.transform(AsmClassTransformer.java:53)
> at org.apache.commons.javaflow.bytecode.transformation.asm.AsmClassTransformer.transform(AsmClassTransformer.java:40)
> at org.apache.commons.javaflow.utils.RewritingUtils.rewriteJar(RewritingUtils.java:108)
> at org.apache.commons.javaflow.utils.RewritingUtils.rewriteJar(RewritingUtils.java:71)
> at org.apache.commons.javaflow.utils.RewritingUtils.main(RewritingUtils.java:181)
> Caused by: java.lang.IndexOutOfBoundsException: Cannot pop operand off
> an empty stack.
> at org.objectweb.asm.tree.analysis.Frame.pop(Unknown Source)
> at org.objectweb.asm.tree.analysis.Frame.execute(Unknown Source)
> at org.apache.commons.javaflow.bytecode.transformation.asm.MonitoringFrame.execute(MonitoringFrame.java:70)
> ... 10 more
> org.objectweb.asm.tree.analysis.AnalyzerException: Error at
> instruction 8: Cannot pop operand off an empty stack.
> at org.objectweb.asm.tree.analysis.Analyzer.analyze(Unknown Source)
> at org.objectweb.asm.util.CheckMethodAdapter$1.visitEnd(Unknown Source)
> at org.objectweb.asm.util.CheckMethodAdapter.visitEnd(Unknown Source)
> at org.objectweb.asm.tree.MethodNode.accept(Unknown Source)
> at org.apache.commons.javaflow.bytecode.transformation.asm.ContinuationMethodAnalyzer.visitEnd(ContinuationMethodAnalyzer.java:141)
> at org.objectweb.asm.ClassReader.accept(Unknown Source)
> at org.objectweb.asm.ClassReader.accept(Unknown Source)
> at org.apache.commons.javaflow.bytecode.transformation.asm.AsmClassTransformer.transform(AsmClassTransformer.java:53)
> at org.apache.commons.javaflow.bytecode.transformation.asm.AsmClassTransformer.transform(AsmClassTransformer.java:40)
> at org.apache.commons.javaflow.utils.RewritingUtils.rewriteJar(RewritingUtils.java:108)
> at org.apache.commons.javaflow.utils.RewritingUtils.rewriteJar(RewritingUtils.java:71)
> at org.apache.commons.javaflow.utils.RewritingUtils.main(RewritingUtils.java:181)
> Caused by: java.lang.IndexOutOfBoundsException: Cannot pop operand off
> an empty stack.
> at org.objectweb.asm.tree.analysis.Frame.pop(Unknown Source)
> at org.objectweb.asm.tree.analysis.Frame.execute(Unknown Source)
> ... 12 more
> Exception in thread "main" java.lang.RuntimeException: Error at
> instruction 8: Cannot pop operand off an empty stack.
> main([Ljava/lang/String;)V
> 00000 R . : : L0
> 00001 R . : : LINENUMBER 19 L0
> 00002 R . : : GETSTATIC java/lang/System.out : Ljava/io/PrintStream;
> 00003 R . : R : LDC "main started"
> 00004 R . : R R : L1
> 00005 R . : R R : INVOKEVIRTUAL java/io/PrintStream.println
> (Ljava/lang/String;)V
> 00006 R . : : L2
> 00007 R . : : LINENUMBER 20 L2
> 00008 R . : : INVOKESPECIAL Test$MyRunnable.<init> ()V
> 00009 ? : NEW Test$MyRunnable
> 00010 ? : DUP
> 00011 ? : L3
> 00012 ? : INVOKESTATIC
> org/apache/commons/javaflow/Continuation.startWith
> (Ljava/lang/Runnable;)Lorg/apache/commons/javaflow/Continuation;
> 00013 ? : ASTORE 1
> 00014 ? : L4
> 00015 ? : LINENUMBER 21 L4
> 00016 ? : GETSTATIC java/lang/System.out : Ljava/io/PrintStream;
> 00017 ? : LDC "in main after continuation return"
> 00018 ? : L5
> 00019 ? : INVOKEVIRTUAL java/io/PrintStream.println
> (Ljava/lang/String;)V
> 00020 ? : L6
> 00021 ? : LINENUMBER 22 L6
> 00022 ? : FRAME APPEND [org/apache/commons/javaflow/Continuation]
> 00023 ? : ALOAD 1
> 00024 ? : IFNULL L7
> 00025 ? : L8
> 00026 ? : LINENUMBER 23 L8
> 00027 ? : ALOAD 1
> 00028 ? : L9
> 00029 ? : INVOKESTATIC
> org/apache/commons/javaflow/Continuation.continueWith
> (Lorg/apache/commons/javaflow/Continuation;)Lorg/apache/commons/javaflow/Continuation;
> 00030 ? : ASTORE 1
> 00031 ? : L10
> 00032 ? : LINENUMBER 24 L10
> 00033 ? : GETSTATIC java/lang/System.out : Ljava/io/PrintStream;
> 00034 ? : LDC "in main"
> 00035 ? : L11
> 00036 ? : INVOKEVIRTUAL java/io/PrintStream.println
> (Ljava/lang/String;)V
> 00037 ? : GOTO L6
> 00038 ? : L7
> 00039 ? : LINENUMBER 26 L7
> 00040 ? : FRAME SAME
> 00041 ? : RETURN
>
>
> at org.objectweb.asm.util.CheckMethodAdapter$1.visitEnd(Unknown Source)
> at org.objectweb.asm.util.CheckMethodAdapter.visitEnd(Unknown Source)
> at org.objectweb.asm.tree.MethodNode.accept(Unknown Source)
> at org.apache.commons.javaflow.bytecode.transformation.asm.ContinuationMethodAnalyzer.visitEnd(ContinuationMethodAnalyzer.java:141)
> at org.objectweb.asm.ClassReader.accept(Unknown Source)
> at org.objectweb.asm.ClassReader.accept(Unknown Source)
> at org.apache.commons.javaflow.bytecode.transformation.asm.AsmClassTransformer.transform(AsmClassTransformer.java:53)
> at org.apache.commons.javaflow.bytecode.transformation.asm.AsmClassTransformer.transform(AsmClassTransformer.java:40)
> at org.apache.commons.javaflow.utils.RewritingUtils.rewriteJar(RewritingUtils.java:108)
> at org.apache.commons.javaflow.utils.RewritingUtils.rewriteJar(RewritingUtils.java:71)
> at org.apache.commons.javaflow.utils.RewritingUtils.main(RewritingUtils.java:181)
>
> Can someone advise how to get this working?
>
> Thanks,
> Hiroshi
>
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