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| author | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2018-10-24 16:29:38 -0300 |
|---|---|---|
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2018-11-30 18:42:05 -0200 |
| commit | 5fb7fc96350575c9adb1316833e48ca11553be49 (patch) | |
| tree | 36acfe25d03b995273b95bdb16f6534b810db3e4 /sysdeps/generic | |
| parent | 14d0e87d9b8caaa2eca7ca81f1189596671fe4fb (diff) | |
| download | glibc-5fb7fc96350575c9adb1316833e48ca11553be49.tar.gz | |
posix: Use posix_spawn on system
This patch uses posix_spawn on system implementation. On Linux this has
the advantage of much lower memory consumption (usually 32 Kb minimum for
the mmap stack area).
Although POSIX does not require, glibc system implementation aims to be
thread and cancellation safe. The cancellation code is moved to generic
implementation and enabled iff SIGCANCEL is defined (similar on how the
cancellation handler is enabled on nptl-init.c).
Checked on x86_64-linux-gnu, i686-linux-gnu, aarch64-linux-gnu,
arm-linux-gnueabihf, and powerpc64le-linux-gnu.
* sysdeps/unix/sysv/linux/spawni.c (__spawni_child): Use
__sigismember instead of sigismember.
* sysdeps/posix/system.c [SIGCANCEL] (cancel_handler_args,
cancel_handler): New definitions.
(CLEANUP_HANDLER, CLEANUP_RESET): Likewise.
(DO_LOCK, DO_UNLOCK, INIT_LOCK, ADD_REF, SUB_REF): Remove.
(do_system): Use posix_spawn instead of fork and execl and remove
reentracy code.
* sysdeps/generic/not-errno.h (__kill_noerrno): New prototype.
* sysdeps/unix/sysv/linux/not-errno.h (__kill_noerrno): Likewise.
* sysdeps/unix/sysv/linux/ia64/system.c: Remove file.
* sysdeps/unix/sysv/linux/s390/system.c: Likewise.
* sysdeps/unix/sysv/linux/sparc/system.c: Likewise.
* sysdeps/unix/sysv/linux/system.c: Likewise.
Diffstat (limited to 'sysdeps/generic')
| -rw-r--r-- | sysdeps/generic/not-errno.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/sysdeps/generic/not-errno.h b/sysdeps/generic/not-errno.h index 93617a3266..0fd66b5c5e 100644 --- a/sysdeps/generic/not-errno.h +++ b/sysdeps/generic/not-errno.h @@ -17,3 +17,5 @@ <http://www.gnu.org/licenses/>. */ extern __typeof (__access) __access_noerrno attribute_hidden; + +extern __typeof (__kill) __kill_noerrno attribute_hidden; |