> What version if java is this jcc built with ?
> To build jcc for debugging with gcc add --debug to the build command. You
should then have symbols visible to gdb.

You mean with setup.py build --debug ? I tried that on trunk and got the
same result.

> Is the version of java used here the same as during jcc build time ?

Yes I made sure of that and uninstalled all but openjdk and rebuilt.

On Wed, Jul 5, 2017 at 10:46 AM, Andi Vajda <[EMAIL PROTECTED]> wrote:

>
> > On Jul 5, 2017, at 18:25, Joshua Campbell <[EMAIL PROTECTED]> wrote:
> >
> > This segfault appears to occur within the JVM code on both
> oracle-java8-jdk
> > and
> > java-1.8.0-openjdk-amd64. I installed the JVM debugging symbols but it
> > didn't seem to help.
> >
> > Occurs under python 2 and 3. I don't know how to debug this any further.
> >
> > 0 joshua@buttercup unnaturalcode 17609$ python3 -m virtualenv -p python3
> > venv3  Already using interpreter /usr/bin/python3
> > Using base prefix '/usr'
> > New python executable in /home/joshua/unnaturalcode/venv3/bin/python3
> > Also creating executable in /home/joshua/unnaturalcode/venv3/bin/python
> > Installing setuptools, pkg_resources, pip, wheel...done.
> > 0 joshua@buttercup unnaturalcode 17610$ source venv3/bin/activate
> > 0 joshua@buttercup unnaturalcode 17611$ which python
> > /home/joshua/unnaturalcode/venv3/bin/python
> > 0 joshua@buttercup unnaturalcode 17616$ pip install jcc --no-cache-dir
> > Collecting jcc
> >  Downloading JCC-3.0.tar.gz (176kB)
> >    100% |████████████████████████████████| 184kB 3.4MB/s
> > Installing collected packages: jcc
> >  Running setup.py install for jcc ... done
>
> What version if java is this jcc built with ?
> To build jcc for debugging with gcc add --debug to the build command. You
> should then have symbols visible to gdb.
>
> > Successfully installed jcc-3.0
> > 0 joshua@buttercup unnaturalcode 17617$ gdb --args
> > /home/joshua/unnaturalcode/venv3/bin/python -m jcc --jar
>
> Is the version of java used here the same as during jcc build time ?
>
> Andi..
>
> > java/lex-java/target/lex-java-1.0-SNAPSHOT.jar
> > GNU gdb (Debian 7.12-6) 7.12.0.20161007-git
> > Copyright (C) 2016 Free Software Foundation, Inc.
> > License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.
> html
> >>
> > This is free software: you are free to change and redistribute it.
> > There is NO WARRANTY, to the extent permitted by law.  Type "show
> copying"
> > and "show warranty" for details.
> > This GDB was configured as "x86_64-linux-gnu".
> > Type "show configuration" for configuration details.
> > For bug reporting instructions, please see:
> > <http://www.gnu.org/software/gdb/bugs/>.
> > Find the GDB manual and other documentation resources online at:
> > <http://www.gnu.org/software/gdb/documentation/>.
> > For help, type "help".
> > Type "apropos word" to search for commands related to "word"...
> > Reading symbols from /home/joshua/unnaturalcode/
> venv3/bin/python...Reading
> > symbols from
> > /usr/lib/debug/.build-id/db/fc2e1a3c58b6d241b3f9af7b2fb3a2
> 4b81b90e.debug...done.
> > done.
> > (gdb) r
> > Starting program: /home/joshua/unnaturalcode/venv3/bin/python -m jcc
> --jar
> > java/lex-java/target/lex-java-1.0-SNAPSHOT.jar
> > [Thread debugging using libthread_db enabled]
> > Using host libthread_db library "/lib/x86_64-linux-gnu/
> libthread_db.so.1".
> > Installing openjdk unwinder
> > Traceback (most recent call last):
> >  File
> > "/usr/share/gdb/auto-load/usr/lib/jvm/java-8-openjdk-amd64/
> jre/lib/amd64/server/
> > libjvm.so-gdb.py", line 52, in <module>
> >    class Types(object):
> >  File
> > "/usr/share/gdb/auto-load/usr/lib/jvm/java-8-openjdk-amd64/
> jre/lib/amd64/server/
> > libjvm.so-gdb.py", line 66, in Types
> >    nmethodp_t = gdb.lookup_type('nmethod').pointer()
> > gdb.error: No type named nmethod.
> >
> > Program received signal SIGSEGV, Segmentation fault.
> > 0x00007fffe47f22b4 in ?? ()
> > (gdb) bt
> > #0  0x00007fffe47f22b4 in ?? ()
> > #1  0x0000000000000246 in ?? ()
Joshua Charles Campbell
Ph.D. Student and Research Assistant
Department of Computing Science
University of Alberta
[EMAIL PROTECTED]