Linux: Add the tgkill function
The tgkill function is sometimes used in crash handlers. <bits/signal_ext.h> follows the same approach as <bits/unistd_ext.h> (which was added for the gettid system call wrapper). Reviewed-by: Carlos O'Donell <carlos@redhat.com>
This commit is contained in:
Florian Weimer
parent
6807f47b81
commit
04b261bdc1
46
ChangeLog
46
ChangeLog
@ -1,3 +1,49 @@
|
||||
2019-05-14 Florian Weimer <fweimer@redhat.com>
|
||||
|
||||
Linux: Add the tgkill function.
|
||||
* bits/signal_ext.h: New file.
|
||||
* manual/signal.texi (Signaling Another Process): Document tgkill.
|
||||
* signal/Makefile (headers): Add bits/signal_ext.h.
|
||||
* signal/signal.h: Include <bits/signal_ext.h>.
|
||||
* sysdeps/unix/sysv/linux/Makefile (tests): Add tst-tgkill.
|
||||
(tst-tgkill): Link with libpthread.
|
||||
* sysdeps/unix/sysv/linux/Versions (GLIBC_2.30): Export tgkill.
|
||||
* sysdeps/unix/sysv/linux/bits/signal_ext.h: New file.
|
||||
* sysdeps/unix/sysv/linux/bits/tst-tgkill.c: Likewise.
|
||||
* sysdeps/unix/sysv/linux/aarch64/libc.abilist (GLIBC_2.30): Add
|
||||
tgkill.
|
||||
* sysdeps/unix/sysv/linux/alpha/libc.abilist: Likewise.
|
||||
* sysdeps/unix/sysv/linux/arm/libc.abilist: Likewise.
|
||||
* sysdeps/unix/sysv/linux/csky/libc.abilist: Likewise.
|
||||
* sysdeps/unix/sysv/linux/hppa/libc.abilist: Likewise.
|
||||
* sysdeps/unix/sysv/linux/i386/libc.abilist: Likewise.
|
||||
* sysdeps/unix/sysv/linux/ia64/libc.abilist: Likewise.
|
||||
* sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist: Likewise.
|
||||
* sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist: Likewise.
|
||||
* sysdeps/unix/sysv/linux/microblaze/libc.abilist: Likewise.
|
||||
* sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist: Likewise.
|
||||
* sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist:
|
||||
Likewise.
|
||||
* sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist: Likewise.
|
||||
* sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist: Likewise.
|
||||
* sysdeps/unix/sysv/linux/nios2/libc.abilist: Likewise.
|
||||
* sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist:
|
||||
Likewise.
|
||||
* sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist:
|
||||
Likewise.
|
||||
* sysdeps/unix/sysv/linux/powerpc/powerpc64/be/libc.abilist:
|
||||
Likewise.
|
||||
* sysdeps/unix/sysv/linux/powerpc/powerpc64/le/libc.abilist:
|
||||
Likewise.
|
||||
* sysdeps/unix/sysv/linux/riscv/rv64/libc.abilist: Likewise.
|
||||
* sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist: Likewise.
|
||||
* sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist: Likewise.
|
||||
* sysdeps/unix/sysv/linux/sh/libc.abilist: Likewise.
|
||||
* sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist: Likewise.
|
||||
* sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist: Likewise.
|
||||
* sysdeps/unix/sysv/linux/x86_64/64/libc.abilist: Likewise.
|
||||
* sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist: Likewise.
|
||||
|
||||
2019-05-14 Carlos O'Donell <carlos@redhat.com>
|
||||
|
||||
* manual/search.texi (Tree Search Function): Adjust twalk_r
|
||||
|
||||
2
NEWS
2
NEWS
@ -20,7 +20,7 @@ Major new features:
|
||||
twalk function, but it passes an additional caller-supplied argument
|
||||
to the callback function.
|
||||
|
||||
* On Linux, the gettid function has been added.
|
||||
* On Linux, the gettid and tgkill functions have been added.
|
||||
|
||||
* Minguo (Republic of China) calendar support has been added as an
|
||||
alternative calendar for the following locales: zh_TW, cmn_TW, hak_TW,
|
||||
|
||||
21
bits/signal_ext.h
Normal file
21
bits/signal_ext.h
Normal file
@ -0,0 +1,21 @@
|
||||
/* System-specific extensions of <signal.h>, generic version.
|
||||
Copyright (C) 2019 Free Software Foundation, Inc.
|
||||
This file is part of the GNU C Library.
|
||||
|
||||
The GNU C Library is free software; you can redistribute it and/or
|
||||
modify it under the terms of the GNU Lesser General Public
|
||||
License as published by the Free Software Foundation; either
|
||||
version 2.1 of the License, or (at your option) any later version.
|
||||
|
||||
The GNU C Library is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
Lesser General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU Lesser General Public
|
||||
License along with the GNU C Library; if not, see
|
||||
<http://www.gnu.org/licenses/>. */
|
||||
|
||||
#ifndef _SIGNAL_H
|
||||
# error "Never include <bits/signal_ext.h> directly; use <signal.h> instead."
|
||||
#endif
|
||||
@ -2291,6 +2291,21 @@ The @var{pid} argument does not refer to an existing process or group.
|
||||
@end table
|
||||
@end deftypefun
|
||||
|
||||
@deftypefun int tgkill (pid_t @var{pid}, pid_t @var{tid}, int @var{signum})
|
||||
@standards{Linux, signal.h}
|
||||
@safety{@prelim{}@mtsafe{}@assafe{}@acsafe{}}
|
||||
The @code{tgkill} function sends the signal @var{signum} to the thread
|
||||
or process with ID @var{tid}, like the @code{kill} function, but only
|
||||
if the process ID of the thread @var{tid} is equal to @var{pid}. If
|
||||
the target thread belongs to another process, the function fails with
|
||||
@code{ESRCH}.
|
||||
|
||||
The @code{tgkill} function can be used to avoid sending a signal to a
|
||||
thread in the wrong process if the caller ensures that the passed
|
||||
@var{pid} value is not reused by the kernel (for example, if it is the
|
||||
process ID of the current process, as returned by @code{getpid}).
|
||||
@end deftypefun
|
||||
|
||||
@deftypefun int killpg (int @var{pgid}, int @var{signum})
|
||||
@standards{BSD, signal.h}
|
||||
@safety{@prelim{}@mtsafe{}@assafe{}@acsafe{}}
|
||||
|
||||
@ -31,7 +31,7 @@ headers := signal.h sys/signal.h \
|
||||
bits/types/sigevent_t.h bits/types/siginfo_t.h \
|
||||
bits/types/sigset_t.h bits/types/sigval_t.h \
|
||||
bits/types/stack_t.h bits/types/struct_sigstack.h \
|
||||
bits/types/__sigval_t.h
|
||||
bits/types/__sigval_t.h bits/signal_ext.h
|
||||
|
||||
routines := signal raise killpg \
|
||||
sigaction sigprocmask kill \
|
||||
|
||||
@ -370,6 +370,9 @@ extern int __libc_current_sigrtmax (void) __THROW;
|
||||
#define SIGRTMIN (__libc_current_sigrtmin ())
|
||||
#define SIGRTMAX (__libc_current_sigrtmax ())
|
||||
|
||||
/* System-specific extensions. */
|
||||
#include <bits/signal_ext.h>
|
||||
|
||||
__END_DECLS
|
||||
|
||||
#endif /* not signal.h */
|
||||
|
||||
@ -53,7 +53,8 @@ sysdep_headers += sys/mount.h sys/acct.h sys/sysctl.h \
|
||||
tests += tst-clone tst-clone2 tst-clone3 tst-fanotify tst-personality \
|
||||
tst-quota tst-sync_file_range tst-sysconf-iov_max tst-ttyname \
|
||||
test-errno-linux tst-memfd_create tst-mlock2 tst-pkey \
|
||||
tst-rlimit-infinity tst-ofdlocks tst-gettid tst-gettid-kill
|
||||
tst-rlimit-infinity tst-ofdlocks tst-gettid tst-gettid-kill \
|
||||
tst-tgkill
|
||||
tests-internal += tst-ofdlocks-compat
|
||||
|
||||
# Generate the list of SYS_* macros for the system calls (__NR_*
|
||||
@ -115,6 +116,7 @@ $(objpfx)tst-mman-consts.out: ../sysdeps/unix/sysv/linux/tst-mman-consts.py
|
||||
|
||||
$(objpfx)tst-gettid: $(shared-thread-library)
|
||||
$(objpfx)tst-gettid-kill: $(shared-thread-library)
|
||||
$(objpfx)tst-tgkill: $(shared-thread-library)
|
||||
|
||||
endif # $(subdir) == misc
|
||||
|
||||
|
||||
@ -175,7 +175,7 @@ libc {
|
||||
getcpu;
|
||||
}
|
||||
GLIBC_2.30 {
|
||||
gettid;
|
||||
gettid; tgkill;
|
||||
}
|
||||
GLIBC_PRIVATE {
|
||||
# functions used in other libraries
|
||||
|
||||
@ -2142,4 +2142,5 @@ GLIBC_2.29 getcpu F
|
||||
GLIBC_2.29 posix_spawn_file_actions_addchdir_np F
|
||||
GLIBC_2.29 posix_spawn_file_actions_addfchdir_np F
|
||||
GLIBC_2.30 gettid F
|
||||
GLIBC_2.30 tgkill F
|
||||
GLIBC_2.30 twalk_r F
|
||||
|
||||
@ -2217,6 +2217,7 @@ GLIBC_2.30 __nldbl_vwarnx F
|
||||
GLIBC_2.30 __nldbl_warn F
|
||||
GLIBC_2.30 __nldbl_warnx F
|
||||
GLIBC_2.30 gettid F
|
||||
GLIBC_2.30 tgkill F
|
||||
GLIBC_2.30 twalk_r F
|
||||
GLIBC_2.4 _IO_fprintf F
|
||||
GLIBC_2.4 _IO_printf F
|
||||
|
||||
@ -127,6 +127,7 @@ GLIBC_2.29 getcpu F
|
||||
GLIBC_2.29 posix_spawn_file_actions_addchdir_np F
|
||||
GLIBC_2.29 posix_spawn_file_actions_addfchdir_np F
|
||||
GLIBC_2.30 gettid F
|
||||
GLIBC_2.30 tgkill F
|
||||
GLIBC_2.30 twalk_r F
|
||||
GLIBC_2.4 _Exit F
|
||||
GLIBC_2.4 _IO_2_1_stderr_ D 0xa0
|
||||
|
||||
31
sysdeps/unix/sysv/linux/bits/signal_ext.h
Normal file
31
sysdeps/unix/sysv/linux/bits/signal_ext.h
Normal file
@ -0,0 +1,31 @@
|
||||
/* System-specific extensions of <signal.h>, Linux version.
|
||||
Copyright (C) 2019 Free Software Foundation, Inc.
|
||||
This file is part of the GNU C Library.
|
||||
|
||||
The GNU C Library is free software; you can redistribute it and/or
|
||||
modify it under the terms of the GNU Lesser General Public
|
||||
License as published by the Free Software Foundation; either
|
||||
version 2.1 of the License, or (at your option) any later version.
|
||||
|
||||
The GNU C Library is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
Lesser General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU Lesser General Public
|
||||
License along with the GNU C Library; if not, see
|
||||
<http://www.gnu.org/licenses/>. */
|
||||
|
||||
#ifndef _SIGNAL_H
|
||||
# error "Never include <bits/signal_ext.h> directly; use <signal.h> instead."
|
||||
#endif
|
||||
|
||||
#ifdef __USE_GNU
|
||||
|
||||
/* Send SIGNAL to the thread TID in the thread group (process)
|
||||
identified by TGID. This function behaves like kill, but also
|
||||
fails with ESRCH if the specified TID does not belong to the
|
||||
specified thread group. */
|
||||
extern int tgkill (__pid_t __tgid, __pid_t __tid, int __signal);
|
||||
|
||||
#endif /* __USE_GNU */
|
||||
@ -2086,4 +2086,5 @@ GLIBC_2.29 xencrypt F
|
||||
GLIBC_2.29 xprt_register F
|
||||
GLIBC_2.29 xprt_unregister F
|
||||
GLIBC_2.30 gettid F
|
||||
GLIBC_2.30 tgkill F
|
||||
GLIBC_2.30 twalk_r F
|
||||
|
||||
@ -2038,6 +2038,7 @@ GLIBC_2.3.4 setsourcefilter F
|
||||
GLIBC_2.3.4 xdr_quad_t F
|
||||
GLIBC_2.3.4 xdr_u_quad_t F
|
||||
GLIBC_2.30 gettid F
|
||||
GLIBC_2.30 tgkill F
|
||||
GLIBC_2.30 twalk_r F
|
||||
GLIBC_2.4 __confstr_chk F
|
||||
GLIBC_2.4 __fgets_chk F
|
||||
|
||||
@ -2204,6 +2204,7 @@ GLIBC_2.3.4 vm86 F
|
||||
GLIBC_2.3.4 xdr_quad_t F
|
||||
GLIBC_2.3.4 xdr_u_quad_t F
|
||||
GLIBC_2.30 gettid F
|
||||
GLIBC_2.30 tgkill F
|
||||
GLIBC_2.30 twalk_r F
|
||||
GLIBC_2.4 __confstr_chk F
|
||||
GLIBC_2.4 __fgets_chk F
|
||||
|
||||
@ -2070,6 +2070,7 @@ GLIBC_2.3.4 setsourcefilter F
|
||||
GLIBC_2.3.4 xdr_quad_t F
|
||||
GLIBC_2.3.4 xdr_u_quad_t F
|
||||
GLIBC_2.30 gettid F
|
||||
GLIBC_2.30 tgkill F
|
||||
GLIBC_2.30 twalk_r F
|
||||
GLIBC_2.4 __confstr_chk F
|
||||
GLIBC_2.4 __fgets_chk F
|
||||
|
||||
@ -128,6 +128,7 @@ GLIBC_2.29 getcpu F
|
||||
GLIBC_2.29 posix_spawn_file_actions_addchdir_np F
|
||||
GLIBC_2.29 posix_spawn_file_actions_addfchdir_np F
|
||||
GLIBC_2.30 gettid F
|
||||
GLIBC_2.30 tgkill F
|
||||
GLIBC_2.30 twalk_r F
|
||||
GLIBC_2.4 _Exit F
|
||||
GLIBC_2.4 _IO_2_1_stderr_ D 0x98
|
||||
|
||||
@ -2147,6 +2147,7 @@ GLIBC_2.3.4 setsourcefilter F
|
||||
GLIBC_2.3.4 xdr_quad_t F
|
||||
GLIBC_2.3.4 xdr_u_quad_t F
|
||||
GLIBC_2.30 gettid F
|
||||
GLIBC_2.30 tgkill F
|
||||
GLIBC_2.30 twalk_r F
|
||||
GLIBC_2.4 __confstr_chk F
|
||||
GLIBC_2.4 __fgets_chk F
|
||||
|
||||
@ -2134,4 +2134,5 @@ GLIBC_2.29 getcpu F
|
||||
GLIBC_2.29 posix_spawn_file_actions_addchdir_np F
|
||||
GLIBC_2.29 posix_spawn_file_actions_addfchdir_np F
|
||||
GLIBC_2.30 gettid F
|
||||
GLIBC_2.30 tgkill F
|
||||
GLIBC_2.30 twalk_r F
|
||||
|
||||
@ -2121,6 +2121,7 @@ GLIBC_2.3.4 setsourcefilter F
|
||||
GLIBC_2.3.4 xdr_quad_t F
|
||||
GLIBC_2.3.4 xdr_u_quad_t F
|
||||
GLIBC_2.30 gettid F
|
||||
GLIBC_2.30 tgkill F
|
||||
GLIBC_2.30 twalk_r F
|
||||
GLIBC_2.4 __confstr_chk F
|
||||
GLIBC_2.4 __fgets_chk F
|
||||
|
||||
@ -2119,6 +2119,7 @@ GLIBC_2.3.4 setsourcefilter F
|
||||
GLIBC_2.3.4 xdr_quad_t F
|
||||
GLIBC_2.3.4 xdr_u_quad_t F
|
||||
GLIBC_2.30 gettid F
|
||||
GLIBC_2.30 tgkill F
|
||||
GLIBC_2.30 twalk_r F
|
||||
GLIBC_2.4 __confstr_chk F
|
||||
GLIBC_2.4 __fgets_chk F
|
||||
|
||||
@ -2127,6 +2127,7 @@ GLIBC_2.3.4 setsourcefilter F
|
||||
GLIBC_2.3.4 xdr_quad_t F
|
||||
GLIBC_2.3.4 xdr_u_quad_t F
|
||||
GLIBC_2.30 gettid F
|
||||
GLIBC_2.30 tgkill F
|
||||
GLIBC_2.30 twalk_r F
|
||||
GLIBC_2.4 __confstr_chk F
|
||||
GLIBC_2.4 __fgets_chk F
|
||||
|
||||
@ -2121,6 +2121,7 @@ GLIBC_2.3.4 setsourcefilter F
|
||||
GLIBC_2.3.4 xdr_quad_t F
|
||||
GLIBC_2.3.4 xdr_u_quad_t F
|
||||
GLIBC_2.30 gettid F
|
||||
GLIBC_2.30 tgkill F
|
||||
GLIBC_2.30 twalk_r F
|
||||
GLIBC_2.4 __confstr_chk F
|
||||
GLIBC_2.4 __fgets_chk F
|
||||
|
||||
@ -2175,4 +2175,5 @@ GLIBC_2.29 getcpu F
|
||||
GLIBC_2.29 posix_spawn_file_actions_addchdir_np F
|
||||
GLIBC_2.29 posix_spawn_file_actions_addfchdir_np F
|
||||
GLIBC_2.30 gettid F
|
||||
GLIBC_2.30 tgkill F
|
||||
GLIBC_2.30 twalk_r F
|
||||
|
||||
@ -2177,6 +2177,7 @@ GLIBC_2.30 __nldbl_vwarnx F
|
||||
GLIBC_2.30 __nldbl_warn F
|
||||
GLIBC_2.30 __nldbl_warnx F
|
||||
GLIBC_2.30 gettid F
|
||||
GLIBC_2.30 tgkill F
|
||||
GLIBC_2.30 twalk_r F
|
||||
GLIBC_2.4 _IO_fprintf F
|
||||
GLIBC_2.4 _IO_printf F
|
||||
|
||||
@ -2210,6 +2210,7 @@ GLIBC_2.30 __nldbl_vwarnx F
|
||||
GLIBC_2.30 __nldbl_warn F
|
||||
GLIBC_2.30 __nldbl_warnx F
|
||||
GLIBC_2.30 gettid F
|
||||
GLIBC_2.30 tgkill F
|
||||
GLIBC_2.30 twalk_r F
|
||||
GLIBC_2.4 _IO_fprintf F
|
||||
GLIBC_2.4 _IO_printf F
|
||||
|
||||
@ -2040,6 +2040,7 @@ GLIBC_2.30 __nldbl_vwarnx F
|
||||
GLIBC_2.30 __nldbl_warn F
|
||||
GLIBC_2.30 __nldbl_warnx F
|
||||
GLIBC_2.30 gettid F
|
||||
GLIBC_2.30 tgkill F
|
||||
GLIBC_2.30 twalk_r F
|
||||
GLIBC_2.4 _IO_fprintf F
|
||||
GLIBC_2.4 _IO_printf F
|
||||
|
||||
@ -2244,4 +2244,5 @@ GLIBC_2.30 __nldbl_vwarnx F
|
||||
GLIBC_2.30 __nldbl_warn F
|
||||
GLIBC_2.30 __nldbl_warnx F
|
||||
GLIBC_2.30 gettid F
|
||||
GLIBC_2.30 tgkill F
|
||||
GLIBC_2.30 twalk_r F
|
||||
|
||||
@ -2104,4 +2104,5 @@ GLIBC_2.29 getcpu F
|
||||
GLIBC_2.29 posix_spawn_file_actions_addchdir_np F
|
||||
GLIBC_2.29 posix_spawn_file_actions_addfchdir_np F
|
||||
GLIBC_2.30 gettid F
|
||||
GLIBC_2.30 tgkill F
|
||||
GLIBC_2.30 twalk_r F
|
||||
|
||||
@ -2172,6 +2172,7 @@ GLIBC_2.30 __nldbl_vwarnx F
|
||||
GLIBC_2.30 __nldbl_warn F
|
||||
GLIBC_2.30 __nldbl_warnx F
|
||||
GLIBC_2.30 gettid F
|
||||
GLIBC_2.30 tgkill F
|
||||
GLIBC_2.30 twalk_r F
|
||||
GLIBC_2.4 _IO_fprintf F
|
||||
GLIBC_2.4 _IO_printf F
|
||||
|
||||
@ -2076,6 +2076,7 @@ GLIBC_2.30 __nldbl_vwarnx F
|
||||
GLIBC_2.30 __nldbl_warn F
|
||||
GLIBC_2.30 __nldbl_warnx F
|
||||
GLIBC_2.30 gettid F
|
||||
GLIBC_2.30 tgkill F
|
||||
GLIBC_2.30 twalk_r F
|
||||
GLIBC_2.4 _IO_fprintf F
|
||||
GLIBC_2.4 _IO_printf F
|
||||
|
||||
@ -2042,6 +2042,7 @@ GLIBC_2.3.4 setsourcefilter F
|
||||
GLIBC_2.3.4 xdr_quad_t F
|
||||
GLIBC_2.3.4 xdr_u_quad_t F
|
||||
GLIBC_2.30 gettid F
|
||||
GLIBC_2.30 tgkill F
|
||||
GLIBC_2.30 twalk_r F
|
||||
GLIBC_2.4 __confstr_chk F
|
||||
GLIBC_2.4 __fgets_chk F
|
||||
|
||||
@ -2166,6 +2166,7 @@ GLIBC_2.30 __nldbl_vwarnx F
|
||||
GLIBC_2.30 __nldbl_warn F
|
||||
GLIBC_2.30 __nldbl_warnx F
|
||||
GLIBC_2.30 gettid F
|
||||
GLIBC_2.30 tgkill F
|
||||
GLIBC_2.30 twalk_r F
|
||||
GLIBC_2.4 _IO_fprintf F
|
||||
GLIBC_2.4 _IO_printf F
|
||||
|
||||
@ -2093,6 +2093,7 @@ GLIBC_2.3.4 setsourcefilter F
|
||||
GLIBC_2.3.4 xdr_quad_t F
|
||||
GLIBC_2.3.4 xdr_u_quad_t F
|
||||
GLIBC_2.30 gettid F
|
||||
GLIBC_2.30 tgkill F
|
||||
GLIBC_2.30 twalk_r F
|
||||
GLIBC_2.4 __confstr_chk F
|
||||
GLIBC_2.4 __fgets_chk F
|
||||
|
||||
@ -111,3 +111,4 @@ memfd_create EXTRA memfd_create i:si memfd_create
|
||||
pkey_alloc EXTRA pkey_alloc i:ii pkey_alloc
|
||||
pkey_free EXTRA pkey_free i:i pkey_free
|
||||
gettid EXTRA gettid Ei: __gettid gettid
|
||||
tgkill EXTRA tgkill i:iii __tgkill tgkill
|
||||
|
||||
132
sysdeps/unix/sysv/linux/tst-tgkill.c
Normal file
132
sysdeps/unix/sysv/linux/tst-tgkill.c
Normal file
@ -0,0 +1,132 @@
|
||||
/* Smoke test for the tgkill system call.
|
||||
Copyright (C) 2019 Free Software Foundation, Inc.
|
||||
This file is part of the GNU C Library.
|
||||
|
||||
The GNU C Library is free software; you can redistribute it and/or
|
||||
modify it under the terms of the GNU Lesser General Public
|
||||
License as published by the Free Software Foundation; either
|
||||
version 2.1 of the License, or (at your option) any later version.
|
||||
|
||||
The GNU C Library is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
Lesser General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU Lesser General Public
|
||||
License along with the GNU C Library; if not, see
|
||||
<http://www.gnu.org/licenses/>. */
|
||||
|
||||
#include <errno.h>
|
||||
#include <signal.h>
|
||||
#include <support/check.h>
|
||||
#include <support/namespace.h>
|
||||
#include <support/xthread.h>
|
||||
#include <unistd.h>
|
||||
|
||||
/* Number of times sigusr1_handler has been invoked. */
|
||||
static volatile sig_atomic_t signals_delivered;
|
||||
|
||||
/* Expected TID of the thread receiving the signal. */
|
||||
static pid_t expected_signal_tid;
|
||||
|
||||
static void
|
||||
sigusr1_handler (int signo)
|
||||
{
|
||||
TEST_COMPARE (expected_signal_tid, gettid ());
|
||||
++signals_delivered;
|
||||
}
|
||||
|
||||
struct pid_and_tid
|
||||
{
|
||||
pid_t pid;
|
||||
pid_t tid;
|
||||
};
|
||||
|
||||
/* Send signals from the subprocess which are not expected to be
|
||||
delivered. There is no handler for SIGUSR2, so delivery will
|
||||
result in a test failure. CLOSURE must point to a valid PID/TID
|
||||
combination that is still running. */
|
||||
static void
|
||||
subprocess_no_tid_match (void *closure)
|
||||
{
|
||||
struct pid_and_tid *ids = closure;
|
||||
TEST_COMPARE (tgkill (ids->pid, gettid (), SIGUSR2), -1);
|
||||
TEST_COMPARE (errno, ESRCH);
|
||||
|
||||
TEST_COMPARE (tgkill (getpid (), ids->tid, SIGUSR2), -1);
|
||||
TEST_COMPARE (errno, ESRCH);
|
||||
|
||||
TEST_COMPARE (tgkill (getppid (), gettid (), SIGUSR2), -1);
|
||||
TEST_COMPARE (errno, ESRCH);
|
||||
}
|
||||
|
||||
/* Called from threadfunc below. */
|
||||
static void
|
||||
subprocess (void *closure)
|
||||
{
|
||||
int original_tid = expected_signal_tid;
|
||||
|
||||
/* Do not expect that the folloing signals are delivered to the
|
||||
subprocess. The parent process retains the original
|
||||
expected_signal_tid value. */
|
||||
expected_signal_tid = 0;
|
||||
TEST_COMPARE (tgkill (getpid (), original_tid, SIGUSR1), -1);
|
||||
TEST_COMPARE (errno, ESRCH);
|
||||
TEST_COMPARE (tgkill (getppid (), gettid (), SIGUSR1), -1);
|
||||
TEST_COMPARE (errno, ESRCH);
|
||||
TEST_COMPARE (expected_signal_tid, 0);
|
||||
|
||||
/* This call has the correct PID/TID combination and is therefore
|
||||
expected to suceed. */
|
||||
TEST_COMPARE (tgkill (getppid (), original_tid, SIGUSR1), 0);
|
||||
}
|
||||
|
||||
static void *
|
||||
threadfunc (void *closure)
|
||||
{
|
||||
TEST_VERIFY (gettid () != getpid ());
|
||||
expected_signal_tid = gettid ();
|
||||
TEST_COMPARE (tgkill (getpid (), gettid (), SIGUSR1), 0);
|
||||
TEST_COMPARE (signals_delivered, 1);
|
||||
signals_delivered = 0;
|
||||
|
||||
support_isolate_in_subprocess (subprocess, NULL);
|
||||
|
||||
/* Check that exactly one signal arrived from the subprocess. */
|
||||
TEST_COMPARE (signals_delivered, 1);
|
||||
|
||||
support_isolate_in_subprocess (subprocess_no_tid_match,
|
||||
&(struct pid_and_tid)
|
||||
{
|
||||
.pid = getpid (),
|
||||
.tid = gettid (),
|
||||
});
|
||||
|
||||
support_isolate_in_subprocess (subprocess_no_tid_match,
|
||||
&(struct pid_and_tid)
|
||||
{
|
||||
.pid = getpid (),
|
||||
.tid = getpid (),
|
||||
});
|
||||
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static int
|
||||
do_test (void)
|
||||
{
|
||||
TEST_VERIFY_EXIT (signal (SIGUSR1, sigusr1_handler) != SIG_ERR);
|
||||
|
||||
expected_signal_tid = gettid ();
|
||||
TEST_COMPARE (gettid (), getpid ());
|
||||
TEST_COMPARE (tgkill (getpid (), gettid (), SIGUSR1), 0);
|
||||
TEST_COMPARE (signals_delivered, 1);
|
||||
signals_delivered = 0;
|
||||
|
||||
xpthread_join (xpthread_create (NULL, threadfunc, NULL));
|
||||
|
||||
TEST_VERIFY (signal (SIGUSR1, SIG_DFL) == sigusr1_handler);
|
||||
return 0;
|
||||
}
|
||||
|
||||
#include <support/test-driver.c>
|
||||
@ -2051,6 +2051,7 @@ GLIBC_2.3.4 setsourcefilter F
|
||||
GLIBC_2.3.4 xdr_quad_t F
|
||||
GLIBC_2.3.4 xdr_u_quad_t F
|
||||
GLIBC_2.30 gettid F
|
||||
GLIBC_2.30 tgkill F
|
||||
GLIBC_2.30 twalk_r F
|
||||
GLIBC_2.4 __confstr_chk F
|
||||
GLIBC_2.4 __fgets_chk F
|
||||
|
||||
@ -2150,4 +2150,5 @@ GLIBC_2.29 getcpu F
|
||||
GLIBC_2.29 posix_spawn_file_actions_addchdir_np F
|
||||
GLIBC_2.29 posix_spawn_file_actions_addfchdir_np F
|
||||
GLIBC_2.30 gettid F
|
||||
GLIBC_2.30 tgkill F
|
||||
GLIBC_2.30 twalk_r F
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user