diff options
| author | Florian Weimer <fweimer@redhat.com> | 2018-01-10 13:18:04 +0100 |
|---|---|---|
| committer | Florian Weimer <fweimer@redhat.com> | 2018-01-10 13:18:04 +0100 |
| commit | f993b8754080ac7572b692870e926d8b493db16c (patch) | |
| tree | 3ab333e5264a3bbcc4d913ef9fc306cc7759773a | |
| parent | 09085ede12fb9650f286bdcd805609ae69f80618 (diff) | |
| download | glibc-f993b8754080ac7572b692870e926d8b493db16c.tar.gz | |
nptl: Open libgcc.so with RTLD_NOW during pthread_cancel [BZ #22636]
Disabling lazy binding reduces stack usage during unwinding.
Note that RTLD_NOW only makes a difference if libgcc.so has not
already been loaded, so this is only a partial fix.
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
| -rw-r--r-- | ChangeLog | 6 | ||||
| -rw-r--r-- | sysdeps/nptl/unwind-forcedunwind.c | 2 |
2 files changed, 7 insertions, 1 deletions
@@ -1,3 +1,9 @@ +2018-01-10 Florian Weimer <fweimer@redhat.com> + + [BZ #22636] + * sysdeps/nptl/unwind-forcedunwind.c (pthread_cancel_init): Open + libgcc.so with RTLD_NOW, to avoid lazy binding during unwind. + 2018-01-10 Samuel Thibault <samuel.thibault@ens-lyon.org> * hurd/hurd/fd.h: Include <fcntl.h> diff --git a/sysdeps/nptl/unwind-forcedunwind.c b/sysdeps/nptl/unwind-forcedunwind.c index ab4350de99..67b8e74b53 100644 --- a/sysdeps/nptl/unwind-forcedunwind.c +++ b/sysdeps/nptl/unwind-forcedunwind.c @@ -49,7 +49,7 @@ pthread_cancel_init (void) return; } - handle = __libc_dlopen (LIBGCC_S_SO); + handle = __libc_dlopen_mode (LIBGCC_S_SO, RTLD_NOW | __RTLD_DLOPEN); if (handle == NULL || (resume = __libc_dlsym (handle, "_Unwind_Resume")) == NULL |