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| author | Frank Ch. Eigler <fche@redhat.com> | 2019-08-06 11:23:48 -0400 |
|---|---|---|
| committer | Frank Ch. Eigler <fche@redhat.com> | 2019-08-06 15:09:53 -0400 |
| commit | 404f29021abaef86a341663444fb069eb1f0282a (patch) | |
| tree | 76a3409f363d27b2c0fcceaaea2dcf2a86f7e5e6 /gdb/config.in | |
| parent | 046bebe1c0a367687bd693eb4594fcdcba0b8f7e (diff) | |
| download | gdb-404f29021abaef86a341663444fb069eb1f0282a.zip gdb-404f29021abaef86a341663444fb069eb1f0282a.tar.gz gdb-404f29021abaef86a341663444fb069eb1f0282a.tar.bz2 | |
[PR build/24886] disable glibc mcheck support
This patch drops gdb's configury support for glibc's mcheck function.
It has been observed to cause false abort()s, because it is
thread-unsafe yet interposes every malloc/free operation. So if any
library transitively used by gdb also uses threads, then these
functions can easily corrupt their own checking data. These days, gcc
ASAN and valgrind provide high quality checking, and mcheck is
apparently itself being slowly deprecated.
So, let's stop linking to it. Attached patch drops the
autoconf/Makefile machinery for both gdb and gdbserver. No
testsuite-visible impact. IMHO not worth mentioning in NEWS.
See also: https://sourceware.org/bugzilla/show_bug.cgi?id=9939
gdb/ChangeLog
PR build/24886
* configure.ac: Drop enable-libmcheck support.
* configure, config.in: Rebuild.
* libmcheck.m4: Remove.
* acinclude.m4: Don't include it.
* Makefile.in: Don't distribute it.
* top.c (print_gdb_configuration): Don't mention it.
gdb/gdbserver/ChangeLog
PR build/24886
* configure.ac: Drop enable-libmcheck support.
* configure, config.in: Rebuild.
* acinclude.m4: Don't include it.
Diffstat (limited to 'gdb/config.in')
| -rw-r--r-- | gdb/config.in | 3 |
1 files changed, 0 insertions, 3 deletions
diff --git a/gdb/config.in b/gdb/config.in index c0291fb..26ca02f 100644 --- a/gdb/config.in +++ b/gdb/config.in @@ -243,9 +243,6 @@ /* Define to 1 if you have the `m' library (-lm). */ #undef HAVE_LIBM -/* Define to 1 if you have the `mcheck' library (-lmcheck). */ -#undef HAVE_LIBMCHECK - /* Define if you have the mpfr library. */ #undef HAVE_LIBMPFR |