[Bug 234201] Regression in LLVM libunwind: Apache Tomcat web application crashes on 12.0 (but not on 11.2)

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=234201

Dave Baukus <daveb at spectralogic.com> changed:

           What    |Removed                     |Added
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                 CC|                            |daveb at spectralogic.com

--- Comment #6 from Dave Baukus <daveb at spectralogic.com> ---
We are seeing this same issue on Release-12.0 in a large Java application; one
of our Java developers created a small, standalone test that emits the
libunwind error message and core dumps:

Core was generated by `/usr/local/openjdk8/bin/java -cp .:fast-md5-2.7.1.jar
MD5Demo'.
Program terminated with signal SIGABRT, Aborted.
#0  0x000000080045230a in thr_kill () from /lib/libc.so.7
[Current thread is 1 (LWP 101996)]
(gdb) bt
#0  0x000000080045230a in thr_kill () from /lib/libc.so.7
#1  0x00000008004506f4 in raise () from /lib/libc.so.7
#2  0x00000008003c3079 in abort () from /lib/libc.so.7
#3  0x00000008007f1f3e in ?? () from /lib/libgcc_s.so.1
#4  0x00000008007f2e49 in ?? () from /lib/libgcc_s.so.1
#5  0x00000008007f2d31 in ?? () from /lib/libgcc_s.so.1
#6  0x000000080020f1ec in dl_iterate_phdr () from /libexec/ld-elf.so.1
#7  0x00000008007f0422 in ?? () from /lib/libgcc_s.so.1
#8  0x00000008007f02a0 in ?? () from /lib/libgcc_s.so.1
#9  0x00000008007ee410 in ?? () from /lib/libgcc_s.so.1
#10 0x00000008007ee6f3 in _Unwind_ForcedUnwind () from /lib/libgcc_s.so.1
#11 0x000000080028cfdc in ?? () from /lib/libthr.so.3
#12 0x000000080028cfa0 in ?? () from /lib/libthr.so.3
#13 0x000000080028cdfb in pthread_exit () from /lib/libthr.so.3
#14 0x000000080027f77e in ?? () from /lib/libthr.so.3
#15 0x0000000000000000 in ?? ()

The problem does NOT occur on FreeBSD-12.0-STABLE-amd64-20190517-r347885. Is
anyone aware of a specific fix ?

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