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| author | Doug Evans <xdje42@gmail.com> | 2014-09-08 22:45:34 -0700 |
|---|---|---|
| committer | Doug Evans <xdje42@gmail.com> | 2014-09-08 22:45:34 -0700 |
| commit | 92d8d229d9a310ebfcfc13bf4a75a286c1add1ac (patch) | |
| tree | b9ce9674fc04930b500d611e033bb5368c9d54a3 /gdb/configure | |
| parent | 837405970476d31d6b4d7774e2c914fdfa7a9930 (diff) | |
| download | gdb-92d8d229d9a310ebfcfc13bf4a75a286c1add1ac.zip gdb-92d8d229d9a310ebfcfc13bf4a75a286c1add1ac.tar.gz gdb-92d8d229d9a310ebfcfc13bf4a75a286c1add1ac.tar.bz2 | |
Fix for PR 17247: Block SIGCHLD while initializing Guile.
The problem here is that if a thread other than gdb's main thread
gets a SIGCHLD (it's an asynchronous signal so the kernel will
essentially pick a random thread) then gdb will hang if it is
in sigsuspend when the SIGCHLD is delivered. The other thread
will see the signal and the sigsuspend won't "wake up".
Guile and libgc should be blocking SIGCHLD in their threads,
but we need to work with Guile 2.0 and libgc 7.4.
The problem first shows up in libgc 7.4 because it is the first
release that enables multiple marker threads by default.
gdb/ChangeLog:
PR 17247
* guile.c: #include <signal.h>.
(_initialize_guile): Block SIGCHLD while initializing Guile.
Replaces the following, which is reverted.
2014-07-26 Doug Evans <xdje42@gmail.com>
PR 17185
* configure.ac: Add check for header gc/gc.h.
Add check for function setenv.
* configure: Regenerate.
* config.in: Regenerate.
* guile/guile.c (_initialize_guile): Add workaround for libgc 7.4.0.
Diffstat (limited to 'gdb/configure')
| -rwxr-xr-x | gdb/configure | 26 |
1 files changed, 0 insertions, 26 deletions
diff --git a/gdb/configure b/gdb/configure index bf141f1..350ec0c 100755 --- a/gdb/configure +++ b/gdb/configure @@ -9276,32 +9276,6 @@ else fi -# PR 17185, see if we can get the libgc version to see if we need -# to apply the workaround. -for ac_header in gc/gc.h -do : - ac_fn_c_check_header_mongrel "$LINENO" "gc/gc.h" "ac_cv_header_gc_gc_h" "$ac_includes_default" -if test "x$ac_cv_header_gc_gc_h" = x""yes; then : - cat >>confdefs.h <<_ACEOF -#define HAVE_GC_GC_H 1 -_ACEOF - -fi - -done - -for ac_func in setenv -do : - ac_fn_c_check_func "$LINENO" "setenv" "ac_cv_func_setenv" -if test "x$ac_cv_func_setenv" = x""yes; then : - cat >>confdefs.h <<_ACEOF -#define HAVE_SETENV 1 -_ACEOF - -fi -done - - # --------------------- # # Check for libmcheck. # # --------------------- # |