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posix: Correctly enable/disable cancellation on Linux posix_spawn

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This patch correctly enable and disable asynchronous cancellation on
Linux posix_spawn.  Current code invert the logic by enabling and
disabling instead.  It also adds a new test to check if posix_spawn
is not a cancellation entrypoint.

Checked on x86_64, i686, powerpc64le, and aarch64.

	* nptl/Makefile (tests): Add tst-exec5.
	* nptl/tst-exec5.c: New file.
	* sysdeps/unix/sysv/linux/spawni.c (__spawni): Correctly enable and disable
	asynchronous cancellation.
This commit is contained in:
Adhemerval Zanella
2016-09-14 14:07:20 -03:00
parent aea5c83461
commit 706e6749de
4 changed files with 188 additions and 3 deletions
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6
sysdeps/unix/sysv/linux/spawni.c
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@ -340,7 +340,9 @@ __spawnix (pid_t * pid, const char *file,
}
/* Disable asynchronous cancellation. */
int cs = LIBC_CANCEL_ASYNC ();
int state;
__libc_ptf_call (__pthread_setcancelstate,
(PTHREAD_CANCEL_DISABLE, &state), 0);
args.file = file;
args.exec = exec;
@ -386,7 +388,7 @@ __spawnix (pid_t * pid, const char *file,
__sigprocmask (SIG_SETMASK, &args.oldmask, 0);
LIBC_CANCEL_RESET (cs);
__libc_ptf_call (__pthread_setcancelstate, (state, NULL), 0);
return ec;
}