Thanks for reporting this. I have created:
https://bugs.openjdk.java.net/browse/JDK-8210375
and will look into it.
Mandy
On 9/4/18 4:26 AM, Michael Rasmussen wrote:
Hi
StackWalker::getCallerClass can throw "UnsupportedOperationException:
StackWalker::getCallerClass called from @CallerSensitive", depending on how the
underlying fetchNextBatch/fill_in_frames splits the stacktrace.
This seems to be a result of what was introduced in JDK-8157464.
The following code example produces the exception (Tested on the jdk.java.net
releases of OpenJDK 10 and 11-ea build 28):
// ----- snip ----
package com.test;
import java.lang.reflect.Method;
public class Main {
public static void main(String[] args) throws Exception {
Method method = Main.class.getDeclaredMethod("bar");
Method m = Method.class.getMethod("invoke", Object.class, Object[].class);
// get 'm' past compilation threshold
for (int i = 0; i < 15; i++) {
m.invoke(Main.class.getDeclaredMethod("dummy"), null, null);
}
m.invoke(m, m, new Object[] {method, new Object[] {null, null}});
}
static void dummy() { }
static void bar() {
System.out.println(StackWalker.getInstance(StackWalker.Option.RETAIN_CLASS_REFERENCE).getCallerClass());
}
}
// ----- snip ----
The above code is constructed so Method::invoke ends up as the frame for which
index==start_index in fill_in_frames, thus causing the exception.
For example output, including stackwalk debug output, see below.
// ----- snip ----
$ java -Xlog:stackwalk=debug com.test.Main
[0.154s][debug][stackwalk] Start walking: mode 6 skip 0 frames batch size 6
[0.155s][debug][stackwalk] skip
java.lang.StackStreamFactory$AbstractStackWalker::callStackWalk
[0.156s][debug][stackwalk] skip
java.lang.StackStreamFactory$AbstractStackWalker::beginStackWalk
[0.157s][debug][stackwalk] skip
java.lang.StackStreamFactory$AbstractStackWalker::walk
[0.158s][debug][stackwalk] skip
java.lang.StackStreamFactory$CallerClassFinder::findCaller
[0.159s][debug][stackwalk] skip java.lang.StackWalker::getCallerClass
[0.160s][debug][stackwalk] fill_in_frames limit=6 start=2 frames length=8
[0.161s][debug][stackwalk] 2: frame method: com.test.Main::bar bci=9
[0.162s][debug][stackwalk] 3: frame method:
jdk.internal.reflect.NativeMethodAccessorImpl::invoke0 bci=0
[0.162s][debug][stackwalk] 4: frame method:
jdk.internal.reflect.NativeMethodAccessorImpl::invoke bci=100
[0.163s][debug][stackwalk] 5: frame method:
jdk.internal.reflect.DelegatingMethodAccessorImpl::invoke bci=6
[0.163s][debug][stackwalk] 6: frame method: java.lang.reflect.Method::invoke
bci=59
[0.168s][debug][stackwalk] 7: frame method:
jdk.internal.reflect.GeneratedMethodAccessor1::invoke bci=48
[0.169s][debug][stackwalk] StackWalk::fetchNextBatch frame_count 8
existing_stream 0x000000a5b8ffb5f0 start 2 frames 10
[0.170s][debug][stackwalk] fill_in_frames limit=8 start=2 frames length=10
[0.171s][debug][stackwalk] 2: frame method:
jdk.internal.reflect.DelegatingMethodAccessorImpl::invoke bci=6
[0.171s][debug][stackwalk] 3: frame method: java.lang.reflect.Method::invoke
bci=59
[0.172s][debug][stackwalk] 4: frame method:
jdk.internal.reflect.GeneratedMethodAccessor1::invoke bci=48
[0.173s][debug][stackwalk] 5: frame method:
jdk.internal.reflect.DelegatingMethodAccessorImpl::invoke bci=6
[0.174s][debug][stackwalk] 6: frame method: java.lang.reflect.Method::invoke
bci=59
[0.175s][debug][stackwalk] 7: frame method:
jdk.internal.reflect.NativeMethodAccessorImpl::invoke0 bci=0
[0.175s][debug][stackwalk] 8: frame method:
jdk.internal.reflect.NativeMethodAccessorImpl::invoke bci=100
[0.179s][debug][stackwalk] 9: frame method:
jdk.internal.reflect.DelegatingMethodAccessorImpl::invoke bci=6
[0.180s][debug][stackwalk] StackWalk::fetchNextBatch frame_count 8
existing_stream 0x000000a5b8ffb5f0 start 2 frames 10
[0.181s][debug][stackwalk] fill_in_frames limit=8 start=2 frames length=10
[0.181s][debug][stackwalk] 2: frame method: java.lang.reflect.Method::invoke
bci=59
Exception in thread "main" java.lang.reflect.InvocationTargetException
at
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at
java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at com.test.Main.main(Main.java:15)
Caused by: java.lang.reflect.InvocationTargetException
at
java.base/jdk.internal.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
at
java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
... 5 more
Caused by: java.lang.reflect.InvocationTargetException
at
java.base/jdk.internal.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
at
java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
... 8 more
Caused by: java.lang.reflect.InvocationTargetException
at
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at
java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
... 11 more
Caused by: java.lang.UnsupportedOperationException: StackWalker::getCallerClass
called from @CallerSensitive
java.lang.reflect.Method.invoke(Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object;
method
at
java.base/java.lang.StackStreamFactory$AbstractStackWalker.fetchStackFrames(Native
Method)
at
java.base/java.lang.StackStreamFactory$AbstractStackWalker.fetchStackFrames(StackStreamFactory.java:386)
at
java.base/java.lang.StackStreamFactory$AbstractStackWalker.getNextBatch(StackStreamFactory.java:322)
at
java.base/java.lang.StackStreamFactory$AbstractStackWalker.peekFrame(StackStreamFactory.java:263)
at
java.base/java.lang.StackStreamFactory$AbstractStackWalker.hasNext(StackStreamFactory.java:351)
at
java.base/java.lang.StackStreamFactory$AbstractStackWalker.nextFrame(StackStreamFactory.java:336)
at
java.base/java.lang.StackStreamFactory$CallerClassFinder.consumeFrames(StackStreamFactory.java:683)
at
java.base/java.lang.StackStreamFactory$CallerClassFinder.consumeFrames(StackStreamFactory.java:612)
at
java.base/java.lang.StackStreamFactory$AbstractStackWalker.doStackWalk(StackStreamFactory.java:306)
at
java.base/java.lang.StackStreamFactory$AbstractStackWalker.callStackWalk(Native
Method)
at
java.base/java.lang.StackStreamFactory$AbstractStackWalker.beginStackWalk(StackStreamFactory.java:370)
at
java.base/java.lang.StackStreamFactory$AbstractStackWalker.walk(StackStreamFactory.java:243)
at
java.base/java.lang.StackStreamFactory$CallerClassFinder.findCaller(StackStreamFactory.java:670)
at java.base/java.lang.StackWalker.getCallerClass(StackWalker.java:600)
at com.test.Main.bar(Main.java:21)
... 15 more
// ----- snip ----
Kind regards
/Michael
