> I am trying to profile an application with callgrind. The application > uses hadoop's libhdfs api which in turn makes JNI calls to a JVM. This > causes a crash in the JVM. When running normally the application seems > to work fine. > > I am running on Centos 6.7 with Valgrind 3.11.0. Java is 1.8 Oracle JDK > (I have also tried open jdk without much luck). > Here is my commandline: > > valgrind -v --tool=callgrind --dump-instr=yes --trace-jump=yes > --trace-children=yes --smc-check=all --collect-jumps=yes > --simulate-cache=yes ./example > > Below are some of the output from valgrind: <snip> I've never programmed for hadoop or the jvm. That said, here's my ideas. First off, if you or the jvm are using jit compilation you could be running into a permissions problem. For example, mmap requires PROT_EXEC in order to execute mmap'ed pages. On a few arches, the implementation is flawed so it is not so, but with valgrind the said bug will manifest itself.
> # JRE version: Java(TM) SE Runtime Environment (8.0_92-b14) (build > 1.8.0_92-b14) > # Java VM: Java HotSpot(TM) 64-Bit Server VM (25.92-b14 mixed mode > linux-amd64 compressed oops) <snip> Having experimented, and having had to run the the authorities on the subject of java I can say that Hotspot is an evil thing. It gave me much headache when compiling the openjdk on Gentoo (that's when I asked, and learned about java's buggy history). My recommendation is to find a java without hotspot, zero, or other old stuff and try again. Here in Gentoo world the openjdk is build with icedtea. I hope this helps. If it does not you aught to go to the openjdk/hadoop folks and ask them for help and perhaps we can work together to find and fix this. Try to create a minimal use case to submit. BTW: Yes, I'm just now caching up on a month of email. Sincerely, David ------------------------------------------------------------------------------ _______________________________________________ Valgrind-users mailing list Valgrind-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/valgrind-users
