nptl: Remove tst-cancel-wrappers test and related macros

With upcoming BZ#12683 fix, syscall cancellation is not more handled
by {libc,pthread,librt}_{enable,disable}_asynccancel symbols.  This renders
both LIBC_CANCEL_HANDLED and empty declaration and tst-cancel-wrappers.sh
unrequired.  This patch removes both the macro and the nptl test.

Checked on x86_64-linux-gnu.

	* io/creat.c (LIBC_CANCEL_HANDLED): Remove macro.
	* io/ppoll.c (LIBC_CANCEL_HANDLED): Likewise.
	* misc/pselect.c (LIBC_CANCEL_HANDLED): Likewise.
	* nptl/pthreadP.h (LIBC_CANCEL_HANDLED): Likewise.
	* sysdeps/generic/sysdep-cancel.h (LIBC_CANCEL_HANDLED): Likewise.
	* sysdeps/mach/hurd/sysdep-cancel.h (LIBC_CANCEL_HANDLED): Likewise.
	* sysdeps/posix/pause.c (LIBC_CANCEL_HANDLED): Likewise.
	* sysdeps/posix/sigpause.c (LIBC_CANCEL_HANDLED): Likewise.
	* sysdeps/unix/sysv/linux/creat.c (LIBC_CANCEL_HANDLED): Likewise.
	* sysdeps/unix/sysv/linux/creat64.c (LIBC_CANCEL_HANDLED): Likewise.
	* sysdeps/unix/sysv/linux/sigwait.c (LIBC_CANCEL_HANDLED): Likewise.
	* sysdeps/unix/sysv/linux/sigwaitinfo.c (LIBC_CANCEL_HANDLED):
	Likewise.
	* nptl/Makefile [$(run-built-tests) = yes] (tests-special): Remove
	tst-cancel-wrappers.sh.
	(generated): Remove tst-cancel-wrappers.out.
	(tst-cancel-wrappers.out): Remove rule.
	* nptl/tst-cancel-wrappers.sh: Remove file.

ChangeLog

@@ -1,3 +1,24 @@
+2019-01-03  Adhemerval Zanella  <adhemerval.zanella@linaro.org>
+
+	* io/creat.c (LIBC_CANCEL_HANDLED): Remove macro.
+	* io/ppoll.c (LIBC_CANCEL_HANDLED): Likewise.
+	* misc/pselect.c (LIBC_CANCEL_HANDLED): Likewise.
+	* nptl/pthreadP.h (LIBC_CANCEL_HANDLED): Likewise.
+	* sysdeps/generic/sysdep-cancel.h (LIBC_CANCEL_HANDLED): Likewise.
+	* sysdeps/mach/hurd/sysdep-cancel.h (LIBC_CANCEL_HANDLED): Likewise.
+	* sysdeps/posix/pause.c (LIBC_CANCEL_HANDLED): Likewise.
+	* sysdeps/posix/sigpause.c (LIBC_CANCEL_HANDLED): Likewise.
+	* sysdeps/unix/sysv/linux/creat.c (LIBC_CANCEL_HANDLED): Likewise.
+	* sysdeps/unix/sysv/linux/creat64.c (LIBC_CANCEL_HANDLED): Likewise.
+	* sysdeps/unix/sysv/linux/sigwait.c (LIBC_CANCEL_HANDLED): Likewise.
+	* sysdeps/unix/sysv/linux/sigwaitinfo.c (LIBC_CANCEL_HANDLED):
+	Likewise.
+	* nptl/Makefile [$(run-built-tests) = yes] (tests-special): Remove
+	tst-cancel-wrappers.sh.
+	(generated): Remove tst-cancel-wrappers.out.
+	(tst-cancel-wrappers.out): Remove rule.
+	* nptl/tst-cancel-wrappers.sh: Remove file.
+
 2019-01-03  Szabolcs Nagy  <szabolcs.nagy@arm.com>
 
 	* sysdeps/unix/sysv/linux/aarch64/bits/hwcap.h: Add comment.

io/creat.c

@@ -27,6 +27,3 @@ creat (const char *file, mode_t mode)
 {
   return __open (file, O_WRONLY|O_CREAT|O_TRUNC, mode);
 }
-
-/* __open handles cancellation.  */
-LIBC_CANCEL_HANDLED ();

io/ppoll.c

@@ -70,7 +70,5 @@ ppoll (struct pollfd *fds, nfds_t nfds, const struct timespec *timeout,
 }
 
 #ifndef ppoll
-/* __poll handles cancellation.  */
-LIBC_CANCEL_HANDLED ();
 libc_hidden_def (ppoll);
 #endif

misc/pselect.c

@@ -73,6 +73,4 @@ __pselect (int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
 }
 #ifndef __pselect
 weak_alias (__pselect, pselect)
-/* __select handles cancellation.  */
-LIBC_CANCEL_HANDLED ();
 #endif

nptl/Makefile

@@ -465,8 +465,7 @@ tests-reverse += tst-cancel5 tst-cancel23 tst-vfork1x tst-vfork2x
 ifeq ($(run-built-tests),yes)
 tests-special += $(objpfx)tst-stack3-mem.out $(objpfx)tst-oddstacklimit.out
 ifeq ($(build-shared),yes)
-tests-special += $(objpfx)tst-tls6.out $(objpfx)tst-cleanup0-cmp.out \
+tests-special += $(objpfx)tst-tls6.out $(objpfx)tst-cleanup0-cmp.out
-		 $(objpfx)tst-cancel-wrappers.out
 endif
 endif
 
@@ -669,8 +668,7 @@ $(objpfx)$(multidir)/crtn.o: $(objpfx)crtn.o $(objpfx)$(multidir)/
 	ln -f $< $@
 endif
 
-generated += multidir.mk tst-atfork2.mtrace tst-cancel-wrappers.out \
+generated += multidir.mk tst-atfork2.mtrace tst-tls6.out
-	     tst-tls6.out
 
 generated += $(objpfx)tst-atfork2.mtrace \
 	     $(addsuffix .so,$(strip $(modules-names)))
@@ -681,18 +679,6 @@ LDFLAGS-pthread.so += -e __nptl_main
 $(objpfx)pt-interp.os: $(common-objpfx)runtime-linker.h
 endif
 
-ifeq ($(run-built-tests),yes)
-ifeq (yes,$(build-shared))
-$(objpfx)tst-cancel-wrappers.out: tst-cancel-wrappers.sh
-	$(SHELL) $< '$(NM)' \
-		    $(common-objpfx)libc_pic.a \
-		    $(common-objpfx)libc.a \
-		    $(objpfx)libpthread_pic.a \
-		    $(objpfx)libpthread.a > $@; \
-	$(evaluate-test)
-endif
-endif
-
 tst-exec4-ARGS = $(host-test-program-cmd)
 
 $(objpfx)tst-execstack: $(libdl)

nptl/pthreadP.h

@@ -325,27 +325,17 @@ __do_cancel (void)
 /* Same as CANCEL_RESET, but for use in libc.so.  */
 # define LIBC_CANCEL_RESET(oldtype) \
   __libc_disable_asynccancel (oldtype)
-# define LIBC_CANCEL_HANDLED() \
-  __asm (".globl " __SYMBOL_PREFIX "__libc_enable_asynccancel"); \
-  __asm (".globl " __SYMBOL_PREFIX "__libc_disable_asynccancel")
 #elif IS_IN (libpthread)
 # define LIBC_CANCEL_ASYNC() CANCEL_ASYNC ()
 # define LIBC_CANCEL_RESET(val) CANCEL_RESET (val)
-# define LIBC_CANCEL_HANDLED() \
-  __asm (".globl " __SYMBOL_PREFIX "__pthread_enable_asynccancel"); \
-  __asm (".globl " __SYMBOL_PREFIX "__pthread_disable_asynccancel")
 #elif IS_IN (librt)
 # define LIBC_CANCEL_ASYNC() \
   __librt_enable_asynccancel ()
 # define LIBC_CANCEL_RESET(val) \
   __librt_disable_asynccancel (val)
-# define LIBC_CANCEL_HANDLED() \
-  __asm (".globl " __SYMBOL_PREFIX "__librt_enable_asynccancel"); \
-  __asm (".globl " __SYMBOL_PREFIX "__librt_disable_asynccancel")
 #else
 # define LIBC_CANCEL_ASYNC()	0 /* Just a dummy value.  */
 # define LIBC_CANCEL_RESET(val)	((void)(val)) /* Nothing, but evaluate it.  */
-# define LIBC_CANCEL_HANDLED()	/* Nothing.  */
 #endif
 
 

nptl/tst-cancel-wrappers.sh

@@ -1,92 +0,0 @@
-#!/bin/sh
-# Test whether all cancelable functions are cancelable.
-# Copyright (C) 2002-2019 Free Software Foundation, Inc.
-# This file is part of the GNU C Library.
-# Contributed by Jakub Jelinek <jakub@redhat.com>, 2002.
-
-# 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/>.
-
-NM="$1"; shift
-while [ $# -gt 0 ]; do
-  ( $NM -P $1; echo 'end[end]:' ) | gawk ' BEGIN {
-C["accept"]=1
-C["close"]=1
-C["connect"]=1
-C["creat"]=1
-C["fcntl"]=1
-C["fdatasync"]=1
-C["fsync"]=1
-C["msgrcv"]=1
-C["msgsnd"]=1
-C["msync"]=1
-C["nanosleep"]=1
-C["open"]=1
-C["open64"]=1
-C["pause"]=1
-C["poll"]=1
-C["pread"]=1
-C["pread64"]=1
-C["pselect"]=1
-C["pwrite"]=1
-C["pwrite64"]=1
-C["read"]=1
-C["readv"]=1
-C["recv"]=1
-C["recvfrom"]=1
-C["recvmsg"]=1
-C["select"]=1
-C["send"]=1
-C["sendmsg"]=1
-C["sendto"]=1
-C["sigpause"]=1
-C["sigsuspend"]=1
-C["sigwait"]=1
-C["sigwaitinfo"]=1
-C["tcdrain"]=1
-C["wait"]=1
-C["waitid"]=1
-C["waitpid"]=1
-C["write"]=1
-C["writev"]=1
-C["__xpg_sigpause"]=1
-}
-/:$/ {
-  if (seen)
-    {
-      if (!seen_enable || !seen_disable)
-	{
-	  printf "in '$1'(%s) %s'\''s cancellation missing\n", object, seen
-	  ret = 1
-	}
-    }
-  seen=""
-  seen_enable=""
-  seen_disable=""
-  object=gensub(/^.*\[(.*)\]:$/, "\\1", 1, $0)
-  next
-}
-{
-  if (C[$1] && $2 ~ /^[TW]$/)
-    seen=$1
-  else if ($1 ~ /^([.]|)__(libc|pthread)_enable_asynccancel$/ && $2 == "U")
-    seen_enable=1
-  else if ($1 ~ /^([.]|)__(libc|pthread)_disable_asynccancel$/ && $2 == "U")
-    seen_disable=1
-}
-END {
-  exit ret
-}' || exit
-  shift
-done

sysdeps/generic/sysdep-cancel.h

@@ -5,4 +5,3 @@
 #define RTLD_SINGLE_THREAD_P (1)
 #define LIBC_CANCEL_ASYNC()	0 /* Just a dummy value.  */
 #define LIBC_CANCEL_RESET(val)	((void)(val)) /* Nothing, but evaluate it.  */
-#define LIBC_CANCEL_HANDLED()	/* Nothing.  */

sysdeps/mach/hurd/sysdep-cancel.h

@@ -6,4 +6,3 @@
 #define RTLD_SINGLE_THREAD_P (0)
 #define LIBC_CANCEL_ASYNC()	0 /* Just a dummy value.  */
 #define LIBC_CANCEL_RESET(val)	((void)(val)) /* Nothing, but evaluate it.  */
-#define LIBC_CANCEL_HANDLED()	/* Nothing.  */

sysdeps/posix/pause.c

@@ -38,5 +38,3 @@ __libc_pause (void)
   return __sigsuspend (&set);
 }
 weak_alias (__libc_pause, pause)
-
-LIBC_CANCEL_HANDLED ();		/* sigsuspend handles our cancellation.  */

sysdeps/posix/sigpause.c

@@ -70,6 +70,3 @@ __xpg_sigpause (int sig)
   return __sigpause (sig, 1);
 }
 strong_alias (__xpg_sigpause, __libc___xpg_sigpause)
-
-/* __sigsuspend handles cancellation.  */
-LIBC_CANCEL_HANDLED ();

sysdeps/unix/sysv/linux/creat.c

@@ -35,6 +35,4 @@ __creat (const char *file, mode_t mode)
 }
 weak_alias (__creat, creat)
 
-LIBC_CANCEL_HANDLED ();
-
 #endif

sysdeps/unix/sysv/linux/creat64.c

@@ -37,5 +37,3 @@ weak_alias (__creat64, creat64)
 strong_alias (__creat64, __creat)
 weak_alias (__creat64, creat)
 #endif
-
-LIBC_CANCEL_HANDLED ();

sysdeps/unix/sysv/linux/sigwait.c

@@ -37,6 +37,3 @@ __sigwait (const sigset_t *set, int *sig)
 libc_hidden_def (__sigwait)
 weak_alias (__sigwait, sigwait)
 strong_alias (__sigwait, __libc_sigwait)
-
-/* __sigtimedwait handles cancellation.  */
-LIBC_CANCEL_HANDLED ();

sysdeps/unix/sysv/linux/sigwaitinfo.c

@@ -28,6 +28,3 @@ __sigwaitinfo (const sigset_t *set, siginfo_t *info)
 libc_hidden_def (__sigwaitinfo)
 weak_alias (__sigwaitinfo, sigwaitinfo)
 strong_alias (__sigwaitinfo, __libc_sigwaitinfo)
-
-/* __sigtimedwait handles cancellation.  */
-LIBC_CANCEL_HANDLED ();