GDB TLS testing

[Mark Millard]

On 2019-Jan-21, at 18:24, Mark Millard <marklmi at yahoo.com> wrote:



> 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


After installing print/texinfo to get makeinfo , the
next problem for me is libintl.h not being found
despite its existence in /usr/local/include/ :

# make
. . .
libtool: compile:  cc -DHAVE_CONFIG_H -I. -DBINDIR=\"/usr/local/bin\" -I. -I. -I./../include -DHAVE_powerpc_elf64_fbsd_vec -DHAVE_powerpc_elf64_vec -DHAVE_powerpc_elf32_vec -DHAVE_powerpc_elf32_fbsd_vec -DHAVE_powerpc_elf32_le_vec -DHAVE_rs6000_xcoff_vec -DHAVE_rs6000_xcoff64_vec -DHAVE_rs6000_xcoff64_aix_vec -DHAVE_elf64_le_vec -DHAVE_elf64_be_vec -DHAVE_elf32_le_vec -DHAVE_elf32_be_vec -DHAVE_plugin_vec -W -Wall -Wstrict-prototypes -Wmissing-prototypes -Wshadow -Werror -I./../zlib -g -O2 -MT archive.lo -MD -MP -MF .deps/archive.Tpo -c archive.c -o archive.o
In file included from archive.c:134:
./sysdep.h:185:11: fatal error: 'libintl.h' file not found
# include <libintl.h>
          ^~~~~~~~~~~
1 error generated.
*** Error code 1

Stop.
make[4]: stopped in /root/c_tests/ppc64_tls_git/bfd
*** Error code 1

Stop.
make[3]: stopped in /root/c_tests/ppc64_tls_git/bfd
*** 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



# find /usr/local/include/ -name libintl.h -print
/usr/local/include/libintl.h


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