GDB TLS testing

[Mark Millard]

On 2019-Jan-21, at 12:58, John Baldwin <jh at freebsd.org> wrote:

> . . .
> 
> Would someone with a working ppc system be willing to help test the GDB bits
> for me?  You can grab the 'fbsd_tls' branch from github/bsdjhb/gdb.git to
> build a GDB.  For testing purposes, just generating a core from the test
> programs I'm using and looking at that core on a non-ppc host would also
> work fine.  For example, in my case where I have the ppc system installed to
> /qemu/ppc64/rootfs, I would do 'set sysroot /qemu/ppc64/rootfs' at the GDB
> prompt to point GDB at the ppc64 libraries, etc.  Note that modern GDB is
> written in C++11, so you can't build it with gcc4.2.
> 
> The first test program I am using is below and should generate a core when
> run.  To test the TLS functionality you would want to make sure 'p id'
> reports the proper value (PID from the program's output), and also that
> 'p &id' also reports an address matching the program's output:
> 
> #include <stdio.h>
> #include <unistd.h>
> 
> static __thread int id;
> 
> int
> main(int ac, char **av)
> {
> 
> 	printf("main: PID %d\n", getpid());
> 	id = getpid();
> 	printf("id = %d (%p)\n", id, &id);
> 	(void)getchar();
> #if 1
> #if defined(__powerpc__)
> 	*(char *)NULL = 1;
> #else
> 	__builtin_trap();
> #endif
> #endif
> 	return (0);
> }

Note: This is from my odd devel/pwoerpc64-xtoolchain-gcc based buildworld
based environment with cc being system clang:

# uname -apKU
FreeBSD FBSDG5L 13.0-CURRENT FreeBSD 13.0-CURRENT #5 r341836M: Tue Dec 11 20:11:21 PST 2018     markmi at FBSDFSSD:/usr/obj/powerpc64vtsc_xtoolchain-gcc/powerpc.powerpc64/usr/src/powerpc.powerpc64/sys/GENERIC64vtsc-NODBG  powerpc powerpc64 1300005 1300005


Absent makeinfo the make failed to complete. (I've no clue if there are
more dependencies required.)

# ./configure
checking build system type... powerpc64-unknown-freebsd13.0
checking host system type... powerpc64-unknown-freebsd13.0
checking target system type... powerpc64-unknown-freebsd13.0
checking for a BSD-compatible install... /usr/bin/install -c
. . .
checking for makeinfo... no
/root/c_tests/ppc64_tls_git/missing: makeinfo: not found
checking for expect... no
. . .
# make
Configuring in ./libiberty
configure: creating cache ./config.cache
checking whether to enable maintainer-specific portions of Makefiles... no
checking for makeinfo... /root/c_tests/ppc64_tls_git/missing makeinfo --split-size=5000000
configure: WARNING:
*** Makeinfo is missing. Info documentation will not be built.
checking for perl... perl
. . .
creating bfdver.texi
restore=: && backupdir=".am$$" &&  rm -rf $backupdir && mkdir $backupdir &&  if (/root/c_tests/ppc64_tls_git/missing makeinfo --split-size=5000000 --split-size=5000000 --version) >/dev/null 2>&1; then  for f in bfd.info bfd.info-[0-9] bfd.info-[0-9][0-9] bfd.i[0-9] bfd.i[0-9][0-9]; do  if test -f $f; then mv $f $backupdir; restore=mv; else :; fi;  done;  else :; fi &&  if /root/c_tests/ppc64_tls_git/missing makeinfo --split-size=5000000 --split-size=5000000   -I .  -o bfd.info `test -f 'bfd.texi' || echo './'`bfd.texi;  then  rc=0;  else  rc=$?;  $restore $backupdir/* `echo "./bfd.info" | sed 's|[^/]*$||'`;  fi;  rm -rf $backupdir; exit $rc
/root/c_tests/ppc64_tls_git/missing: makeinfo: not found
WARNING: 'makeinfo' is missing on your system.
         You should only need it if you modified a '.texi' file, or
         any other file indirectly affecting the aspect of the manual.
         You might want to install the Texinfo package:
         <http://www.gnu.org/software/texinfo/>
         The spurious makeinfo call might also be the consequence of
         using a buggy 'make' (AIX, DU, IRIX), in which case you might
         want to install GNU make:
         <http://www.gnu.org/software/make/>
*** Error code 127

Stop.
make[3]: stopped in /root/c_tests/ppc64_tls_git/bfd/doc
*** Error code 1

Stop.
make[2]: stopped in /root/c_tests/ppc64_tls_git/bfd
*** Error code 1

Stop.
make[1]: stopped in /root/c_tests/ppc64_tls_git
*** Error code 1

Stop.
make: stopped in /root/c_tests/ppc64_tls_git


===
Mark Millard
marklmi at yahoo.com
( dsl-only.net went
away in early 2018-Mar)