"java 19983 cycles:" not matched as the event header - perf v3.2.28

[techtony2018]

Environment:
hostname : xguan-ubuntu
os release : 3.2.0-31-generic
perf version : 3.2.28
arch : x86_64
cmdline : /usr/bin/perf_3.2.0-31 record -F 99 -p 19982 -g sleep 30

...

The perf.out:

java 19983 cycles:
7f7241fbe6d8 arrayOopDesc::base(BasicType) const (/home/xguan/opt/jdk1.8.0_112/jre/lib/amd64/server/libjvm.so)
7f7241239aec writeBytes (/home/xguan/opt/jdk1.8.0_112/jre/lib/amd64/libjava.so)
7f724123176f Java_java_io_FileOutputStream_writeBytes (/home/xguan/opt/jdk1.8.0_112/jre/lib/amd64/libjava.so)
7f722d119786 Ljava/io/FileOutputStream;::writeBytes (/tmp/perf-19982.map)
7f722d142778 Ljava/io/PrintStream;::print (/tmp/perf-19982.map)
7f722d12e1d4 LBusy;::main (/tmp/perf-19982.map)
7f722d0004e7 call_stub (/tmp/perf-19982.map)
7f72421d2d76 JavaCalls::call_helper(JavaValue_, methodHandle_, JavaCallArguments_, Thread_) (/home/xguan/opt/jdk1.8.0_112/jre/lib/amd64/server/libjvm.so)
7f72421ed566 jni_invoke_static(JNIEnv__, JavaValue_, jobject, JNICallType, jmethodID, JNI_ArgumentPusher_, Thread_) (/home/xguan/opt/jdk1.8.0_112/jre/lib/amd64/server/libjvm.so)
7f72421f987a jni_CallStaticVoidMethod (/home/xguan/opt/jdk1.8.0_112/jre/lib/amd64/server/libjvm.so)
7f724309ebdf JavaMain (/home/xguan/opt/jdk1.8.0_112/lib/amd64/jli/libjli.so)
7f72432b4e9a start_thread (/lib/x86_64-linux-gnu/libpthread-2.15.so)

When I tried:

./stackcollapse-perf.pl perf.out

Unrecognized line: java 19983 cycles: at ./stackcollapse-perf.pl line 264, <> line 3609.
Use of uninitialized value $pname in string eq at ./stackcollapse-perf.pl line 246, <> line 3610.

And the fix is to tweak the regular expression in line 177.

[brendangregg]

Sorry, the regexp recently changed before I had enabled a test suite. Hopefully this is the last regexp fix, now that we have automated tests! :)

I'll dig up a 3.2 perf output and add it to the test suite.

//CC @skarcha

[techtony2018]

Thanks!
That was quick! 👍

[skarcha]

Ops! I have the patch. Expect a PR soon. Thanks for the CC @brendangregg

[brendangregg]

I did add a couple of new test files to cover it, perf-funcab-cmd-01.txt and perf-funcab-pid-01.txt. I probably broke the test system as I haven't added the results/ files yet.

[skarcha]

I see. I used them to test. Thanks... ;)

[techtony2018]

Just edited the original post to rid of the bold formatting brought by '#'s

[skarcha]

Thanks @guanxiaohua. I've just do the PR.

[brendangregg]

should be fixed by #96.