bug#19980: closed (Re: Segfault in master)

[Eric Hanchrow <eric.hanchrow@gmail.com>]

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That commit fixed it for me; thanks!

On Thu, Mar 5, 2015 at 12:03 PM GNU bug Tracking System <
help-debbugs@gnu.org> wrote:

> Your bug report
>
> #19959: master: `Backtrace after malloc arena is corrupted` causes
> segfault during build
>
> which was filed against the emacs package, has been closed.
>
> The explanation is attached below, along with your original report.
> If you require more details, please reply to 19980@debbugs.gnu.org.
>
> --
> 19959: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=19959
> GNU Bug Tracking System
> Contact help-debbugs@gnu.org with problems
>
>
>
> ---------- Forwarded message ----------
> From: Paul Eggert <eggert@cs.ucla.edu>
> To: Colin Baxter <m43cap@yandex.com>, emacs-devel@gnu.org
> Cc: 19959-done@debbugs.gnu.org
> Date: Thu, 05 Mar 2015 12:01:53 -0800
> Subject: Re: Segfault in master
> On 03/05/2015 01:31 AM, Colin Baxter wrote:
> > Patch worked for me. Thanks David.
> >
> >
>
> Thanks, I installed a (slightly different) patch as commit
> cbc9d8d4269f2cca7950060b5e37747b27dac1de and am marking Emacs Bug#19959
> as fixed.  I also filed a bug report with the glibc folks (glibc bug
> 18084).
>
>
>
>
> ---------- Forwarded message ----------
> From: Eric Hanchrow <eric.hanchrow@gmail.com>
> To: bug-gnu-emacs@gnu.org
> Cc:
> Date: Mon, 02 Mar 2015 03:28:41 +0000
> Subject: master: `Backtrace after malloc arena is corrupted` causes
> segfault during build
> I built emacs from the "master" branch ofhttps://
> github.com/emacs-mirror/emacs.  It failed as shown below.
>
> vagrant@vagrant-ubuntu-server-trusty-32:~/git-repositories/3rd-party/emacs$
> cat /etc/issue
> Ubuntu 14.04.2 LTS \n \l
>
> vagrant@vagrant-ubuntu-server-trusty-32:~/git-repositories/3rd-party/emacs$
> uname -a
> Linux vagrant-ubuntu-server-trusty-32 3.13.0-46-generic #76-Ubuntu SMP Thu
> Feb 26 18:52:49 UTC 2015 i686 i686 i686 GNU/Linux
> vagrant@vagrant-ubuntu-server-trusty-32:~/git-repositories/3rd-party/emacs$
> git show --stat
> commit b74db6347cf5cac1ebd4c604fd5691c588fd8e32
> Author: Paul Eggert <eggert@cs.ucla.edu>
> Date:   Tue Feb 24 16:34:13 2015 -0800
>
>     Backtrace after malloc arena is corrupted
>
>     Without this change, if the malloc arena is corrupted and then
>     'backtrace' is called, the backtrace can crash because 'backtrace'
>     calls 'malloc'.  For more, please see:
>     https://sourceware.org/ml/libc-alpha/2015-02/msg00678.html
>     * emacs.c (main): Initialize tables used by 'backtrace'.
>     * sysdep.c (emacs_backtrace): Document the newly used part of the API.
>
>  src/ChangeLog | 10 ++++++++++
>  src/emacs.c   |  2 ++
>  src/sysdep.c  | 12 +++++++++++-
>  3 files changed, 23 insertions(+), 1 deletion(-)
>
> vagrant@vagrant-ubuntu-server-trusty-32:~/git-repositories/3rd-party/emacs$
> ./autogen.sh && ./configure --without-x && make
> Checking whether you have the necessary tools...
> (Read INSTALL.REPO for more details on building Emacs)
>
> Checking for autoconf (need at least version 2.65)...
> ok
> Checking for automake (need at least version 1.11)...
> ok
> Your system has the required tools.
> Running 'autoreconf -fi -I m4' ...
> configure.ac:756: installing 'build-aux/compile'
> configure.ac:139: installing 'build-aux/config.guess'
> configure.ac:139: installing 'build-aux/config.sub'
> configure.ac:136: installing 'build-aux/install-sh'
> configure.ac:136: installing 'build-aux/missing'
> lib/Makefile.am: installing 'build-aux/depcomp'
> You can now run './configure'.
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> checking sys/acl.h presence... no
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> configure: WARNING: libacl development library was not found or not usable.
> configure: WARNING: GNU Emacs will be built without ACL support.
> checking whether readlink signature is correct... yes
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>
> Configured for `i686-pc-linux-gnu'.
>
>   Where should the build process find the source code?    .
>   What compiler should emacs be built with?               gcc -std=gnu99
> -g3 -O2
>   Should Emacs use the GNU version of malloc?             yes
>       (Using Doug Lea's new malloc from the GNU C Library.)
>   Should Emacs use a relocating allocator for buffers?    no
>   Should Emacs use mmap(2) for buffer allocation?         no
>   What window system should Emacs use?                    none
>   What toolkit should Emacs use?                          none
>   Where do we find X Windows header files?                NONE
>   Where do we find X Windows libraries?                   NONE
>   Does Emacs use -lXaw3d?                                 no
>   Does Emacs use -lXpm?                                   no
>   Does Emacs use -ljpeg?                                  no
>   Does Emacs use -ltiff?                                  no
>   Does Emacs use a gif library?                           no
>   Does Emacs use a png library?                           no
>   Does Emacs use -lrsvg-2?                                no
>   Does Emacs use imagemagick?                             no
>   Does Emacs support sound?                               yes
>   Does Emacs use -lgpm?                                   yes
>   Does Emacs use -ldbus?                                  yes
>   Does Emacs use -lgconf?                                 no
>   Does Emacs use GSettings?                               no
>   Does Emacs use a file notification library?             yes -lgio (gfile)
>   Does Emacs use access control lists?                    no
>   Does Emacs use -lselinux?                               yes
>   Does Emacs use -lgnutls?                                yes
>   Does Emacs use -lxml2?                                  yes
>   Does Emacs use -lfreetype?                              no
>   Does Emacs use -lm17n-flt?                              no
>   Does Emacs use -lotf?                                   no
>   Does Emacs use -lxft?                                   no
>   Does Emacs directly use zlib?                           yes
>   Does Emacs use toolkit scroll bars?                     no
>
>
> checking that generated files are newer than configure... done
> configure: creating ./config.status
> config.status: creating ./doc/man/emacs.1
> config.status: creating Makefile
> config.status: creating lib/Makefile
> config.status: creating lib-src/Makefile
> config.status: creating oldXMenu/Makefile
> config.status: creating doc/emacs/Makefile
> config.status: creating doc/misc/Makefile
> config.status: creating doc/lispintro/Makefile
> config.status: creating doc/lispref/Makefile
> config.status: creating src/Makefile
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> config.status: creating src/config.h
> config.status: executing depfiles commands
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> config.status: executing src/.gdbinit commands
> config.status: executing doc/emacs/emacsver.texi commands
> config.status: executing etc-refcards-emacsver.tex commands
> make -C lib all
> make[1]: Entering directory
> `/home/vagrant/git-repositories/3rd-party/emacs/lib'
>   GEN      alloca.h
>   GEN      c++defs.h
>   GEN      arg-nonnull.h
>   GEN      warn-on-use.h
>   GEN      dirent.h
>   GEN      fcntl.h
>   GEN      inttypes.h
>   GEN      signal.h
>   GEN      stdalign.h
>   GEN      stddef.h
>   GEN      stdio.h
>   GEN      stdlib.h
>   GEN      string.h
>   GEN      sys/select.h
>   GEN      sys/stat.h
>   GEN      sys/time.h
>   GEN      sys/types.h
>   GEN      time.h
>   GEN      unistd.h
> make  all-am
> make[2]: Entering directory
> `/home/vagrant/git-repositories/3rd-party/emacs/lib'
>   CC       allocator.o
>   CC       binary-io.o
>   CC       c-ctype.o
>   CC       c-strcasecmp.o
>   CC       c-strncasecmp.o
>   CC       careadlinkat.o
>   CC       close-stream.o
>   CC       count-one-bits.o
>   CC       count-trailing-zeros.o
>   CC       md5.o
>   CC       sha1.o
>   CC       sha256.o
>   CC       sha512.o
>   CC       dtoastr.o
>   CC       dtotimespec.o
>   CC       filemode.o
>   CC       gettime.o
>   CC       pipe2.o
>   CC       acl-errno-valid.o
>   CC       file-has-acl.o
>   CC       qcopy-acl.o
>   CC       qset-acl.o
>   CC       stat-time.o
>   CC       strftime.o
>   CC       timespec.o
>   CC       timespec-add.o
>   CC       timespec-sub.o
>   CC       u64.o
>   CC       unistd.o
>   CC       utimens.o
>   CC       openat-die.o
>   CC       save-cwd.o
>   CC       fcntl.o
>   CC       sig2str.o
>   AR       libgnu.a
> make[2]: Leaving directory
> `/home/vagrant/git-repositories/3rd-party/emacs/lib'
> make[1]: Leaving directory
> `/home/vagrant/git-repositories/3rd-party/emacs/lib'
> make -C lib-src all
> make[1]: Entering directory
> `/home/vagrant/git-repositories/3rd-party/emacs/lib-src'
>   CC       regex.o
>   CCLD     etags
>   CCLD     ctags
>   CCLD     emacsclient
>   CCLD     ebrowse
>   CCLD     profile
>   CC       pop.o
>   CCLD     movemail
>   CCLD     hexl
>   CCLD     update-game-score
>   CCLD     make-docfile
> make[1]: Leaving directory
> `/home/vagrant/git-repositories/3rd-party/emacs/lib-src'
> make -C src VCSWITNESS='$(srcdir)/../.git/logs/HEAD' all
> make[1]: Entering directory
> `/home/vagrant/git-repositories/3rd-party/emacs/src'
>   GEN      globals.h
>   CC       vm-limit.o
>   CC       dispnew.o
>   CC       frame.o
>   CC       scroll.o
>   CC       xdisp.o
>   CC       menu.o
>   CC       window.o
>   CC       charset.o
>   CC       coding.o
>   CC       category.o
>   CC       ccl.o
>   CC       character.o
>   CC       chartab.o
>   CC       bidi.o
>   CC       cm.o
>   CC       term.o
>   CC       terminal.o
>   CC       xfaces.o
>   CC       dbusbind.o
>   CC       emacs.o
>   CC       keyboard.o
>   CC       macros.o
>   CC       keymap.o
>   CC       sysdep.o
>   CC       buffer.o
>   CC       filelock.o
>   CC       insdel.o
>   CC       marker.o
>   CC       minibuf.o
>   CC       fileio.o
>   CC       dired.o
>   CC       cmds.o
>   CC       casetab.o
>   CC       casefiddle.o
>   CC       indent.o
>   CC       search.o
>   CC       regex.o
>   CC       undo.o
>   CC       alloc.o
>   CC       data.o
>   GEN      buildobj.h
>   CC       doc.o
>   CC       editfns.o
>   CC       callint.o
>   CC       eval.o
>   CC       floatfns.o
>   CC       fns.o
>   CC       font.o
>   CC       print.o
>   CC       lread.o
>   CC       syntax.o
>   CC       unexelf.o
>   CC       bytecode.o
>   CC       process.o
>   CC       gnutls.o
>   CC       callproc.o
>   CC       region-cache.o
>   CC       sound.o
>   CC       atimer.o
>   CC       doprnt.o
>   CC       intervals.o
>   CC       textprop.o
>   CC       composite.o
>   CC       xml.o
>   CC       gfilenotify.o
>   CC       profiler.o
>   CC       decompress.o
>   CC       xgselect.o
>   CC       terminfo.o
>   CC       lastfile.o
>   CCLD     temacs
> /bin/mkdir -p ../etc
> : paxctl -r temacs
> : setfattr -n user.pax.flags -v er temacs
> make -C ../lisp update-subdirs
> make[2]: Entering directory
> `/home/vagrant/git-repositories/3rd-party/emacs/lisp'
> for file in `find . -type d -print`; do case $file in .*/cedet* | .*/leim*
> ) ;; *) wins="$wins${wins:+ }$file" ;; esac; done; \
> for file in $wins; do \
>    ./../build-aux/update-subdirs $file; \
> done;
> make[2]: Leaving directory
> `/home/vagrant/git-repositories/3rd-party/emacs/lisp'
> ./temacs --batch --load loadup bootstrap
> make[1]: *** [bootstrap-emacs] Segmentation fault (core dumped)
> make[1]: Leaving directory
> `/home/vagrant/git-repositories/3rd-party/emacs/src'
> make: *** [src] Error 2
> vagrant@vagrant-ubuntu-server-trusty-32:~/git-repositories/3rd-party/emacs/src$
> gdb temacs
> GNU gdb (Ubuntu 7.7.1-0ubuntu5~14.04.2) 7.7.1
> Copyright (C) 2014 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 "i686-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 temacs...done.
> warning: File
> "/home/vagrant/git-repositories/3rd-party/emacs/src/.gdbinit" auto-loading
> has been declined by your `auto-load safe-path' set to
> "$debugdir:$datadir/auto-load".
> To enable execution of this file add
> add-auto-load-safe-path
> /home/vagrant/git-repositories/3rd-party/emacs/src/.gdbinit
> line to your configuration file "/home/vagrant/.gdbinit".
> To completely disable this security protection add
> set auto-load safe-path /
> line to your configuration file "/home/vagrant/.gdbinit".
> For more information about this security protection see the
> "Auto-loading safe path" section in the GDB manual.  E.g., run from the
> shell:
> info "(gdb)Auto-loading safe path"
> (gdb) run --batch --load loadup bootstrap
> Starting program:
> /home/vagrant/git-repositories/3rd-party/emacs/src/temacs --batch --load
> loadup bootstrap
> [Thread debugging using libthread_db enabled]
> Using host libthread_db library "/lib/i386-linux-gnu/libthread_db.so.1".
> process 8435 is executing new program:
> /home/vagrant/git-repositories/3rd-party/emacs/src/temacs
> [Thread debugging using libthread_db enabled]
> Using host libthread_db library "/lib/i386-linux-gnu/libthread_db.so.1".
>
> Program received signal SIGSEGV, Segmentation fault.
> __GI___backtrace (array=array@entry=0xbfffedcc, size=size@entry=0) at
> ../sysdeps/i386/backtrace.c:141
> 141 ../sysdeps/i386/backtrace.c: No such file or directory.
> (gdb) bt
> #0  __GI___backtrace (array=array@entry=0xbfffedcc, size=size@entry=0) at
> ../sysdeps/i386/backtrace.c:141
> #1  0x080ed543 in emacs_backtrace (backtrace_limit=backtrace_limit@entry=-1)
> at sysdep.c:2177
> #2  0x0804f744 in main (argc=<optimized out>, argv=0xbffff6d4) at
> emacs.c:887
> (gdb)
>
>

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