nptl: Add more missing placeholder abi symbol from nanosleep move

This patch adds the missing __libpthread_version_placeholder for
GLIBC_2.2.6 version from the nanosleep implementation move from
libpthread to libc (79a547b162).

It also fixes the wrong compat symbol definitions added by changing
back the version used on vfork check and remove the
__libpthread_version_placeholder added on some ABI (4f4bb489e0dd).

The __libpthread_version_placeholder is also refactored to make it
simpler to add new compat_symbols by adding a new macro
compat_symbol_unique which uses the compiler extension __COUNTER__
to generate unique strong alias to be used with compat_symbol.

Checked with a updated-abi on the all affected abis of the nanosleep
move.

Change-Id: I347a4dbdc931bb42b359456932dd1e17aa4d4078

diff --git a/include/shlib-compat.h b/include/shlib-compat.h
index f1c2fd8..fafb526 100644 (file)
--- a/include/shlib-compat.h
+++ b/include/shlib-compat.h
@@ -64,6 +64,41 @@
 # define compat_symbol(lib, local, symbol, version) \
   compat_symbol_reference (lib, local, symbol, version)
 
+/* This is similar to compat_symbol, but allows versioning the same symbol
+   to multiple version without having multiple symbol definitions.  For
+   instance:
+
+   #if (SHLIB_COMPAT (libpthread, GLIBC_2_1_2, GLIBC_2_2))
+   compat_symbol_unique (libc, old_foo, GLIBC_2_1_2)
+   #endif
+
+   #if (SHLIB_COMPAT (libpthread, GLIBC_2_2_6, GLIBC_2_3))
+   compat_symbol_unique (libc, old_foo, GLIBC_2_2_6)
+   #endif
+
+   Internally it creates a unique strong alias to the input symbol and
+   creates one compat_symbol on the alias.  Using the above example,
+   it is similar to:
+
+   #if (SHLIB_COMPAT (libpthread, GLIBC_2_1_2, GLIBC_2_2))
+   strong_alias (old_foo, old_foo__COUNTER__)
+   compat_symbol (libc, old_foo__COUNTER__, foo, GLIBC_2_2)
+   #endif.
+
+   With __COUNTER__ being a monotonic number generated by the compiler.  */
+
+# define __compat_symbol_unique_concat(x, y) x ## y
+# define _compat_symbol_unique_concat(x, y) \
+  __compat_symbol_unique_concat (x, y)
+# define _compat_symbol_unique_alias(name) \
+  _compat_symbol_unique_concat (name, __COUNTER__)
+# define _compat_symbol_unique(lib, orig_name, name, version) \
+  strong_alias (orig_name, name) \
+  compat_symbol (lib, name, orig_name, version)
+# define compat_symbol_unique(lib, name, version) \
+  _compat_symbol_unique (lib, name, _compat_symbol_unique_alias (name), \
+                         version)
+
 #else
 
 /* Not compiling ELF shared libraries at all, so never any old versions.  */
@@ -75,6 +110,7 @@
 
 /* This should not appear outside `#if SHLIB_COMPAT (...)'.  */
 # define compat_symbol(lib, local, symbol, version) ...
+# define compat_symbol_unique(lib, name, version) ...
 
 #endif
 

diff --git a/nptl/libpthread-compat.c b/nptl/libpthread-compat.c
index 7398f5e..e2db3f2 100644 (file)
--- a/nptl/libpthread-compat.c
+++ b/nptl/libpthread-compat.c
@@ -16,8 +16,18 @@
    License along with the GNU C Library; if not, see
    <https://www.gnu.org/licenses/>.  */
 
+#include <sys/cdefs.h>
 #include <shlib-compat.h>
 
+#ifdef SHARED
+static void
+attribute_compat_text_section
+__attribute_used__
+__libpthread_version_placeholder (void)
+{
+}
+#endif
+
 /* This is an unused compatibility symbol definition, to prevent ld
    from creating a weak version definition for GLIBC_2.1.2.  (__vfork
    used to be defined at that version, but it is now provided by libc,
@@ -26,12 +36,12 @@
    version or later, the placeholder symbol is not needed because
    there are plenty of other symbols which populate those later
    versions.  */
-#if (SHLIB_COMPAT (libpthread, GLIBC_2_1_2, GLIBC_2_2_6))
-void
-attribute_compat_text_section
-__libpthread_version_placeholder (void)
-{
-}
-compat_symbol (libpthread, __libpthread_version_placeholder,
-               __libpthread_version_placeholder, GLIBC_2_1_2);
+#if (SHLIB_COMPAT (libpthread, GLIBC_2_1_2, GLIBC_2_2))
+compat_symbol_unique (libpthread,
+                     __libpthread_version_placeholder, GLIBC_2_1_2);
+#endif
+
+#if (SHLIB_COMPAT (libpthread, GLIBC_2_2_6, GLIBC_2_3))
+compat_symbol_unique (libpthread,
+                     __libpthread_version_placeholder, GLIBC_2_2_6);
 #endif

diff --git a/sysdeps/unix/sysv/linux/alpha/libpthread.abilist b/sysdeps/unix/sysv/linux/alpha/libpthread.abilist
index f42bcff..da5e997 100644 (file)
--- a/sysdeps/unix/sysv/linux/alpha/libpthread.abilist
+++ b/sysdeps/unix/sysv/linux/alpha/libpthread.abilist
@@ -192,6 +192,7 @@ GLIBC_2.2 pwrite F
 GLIBC_2.2 pwrite64 F
 GLIBC_2.2 sem_timedwait F
 GLIBC_2.2.3 pthread_getattr_np F
+GLIBC_2.2.6 __libpthread_version_placeholder F
 GLIBC_2.28 call_once F
 GLIBC_2.28 cnd_broadcast F
 GLIBC_2.28 cnd_destroy F

diff --git a/sysdeps/unix/sysv/linux/hppa/libpthread.abilist b/sysdeps/unix/sysv/linux/hppa/libpthread.abilist
index d87fadf..15b72c4 100644 (file)
--- a/sysdeps/unix/sysv/linux/hppa/libpthread.abilist
+++ b/sysdeps/unix/sysv/linux/hppa/libpthread.abilist
@@ -18,7 +18,6 @@ GLIBC_2.2 __h_errno_location F
 GLIBC_2.2 __libc_allocate_rtsig F
 GLIBC_2.2 __libc_current_sigrtmax F
 GLIBC_2.2 __libc_current_sigrtmin F
-GLIBC_2.2 __libpthread_version_placeholder F
 GLIBC_2.2 __lseek F
 GLIBC_2.2 __open F
 GLIBC_2.2 __open64 F
@@ -185,6 +184,7 @@ GLIBC_2.2 wait F
 GLIBC_2.2 waitpid F
 GLIBC_2.2 write F
 GLIBC_2.2.3 pthread_getattr_np F
+GLIBC_2.2.6 __libpthread_version_placeholder F
 GLIBC_2.28 call_once F
 GLIBC_2.28 cnd_broadcast F
 GLIBC_2.28 cnd_destroy F

diff --git a/sysdeps/unix/sysv/linux/i386/libpthread.abilist b/sysdeps/unix/sysv/linux/i386/libpthread.abilist
index 5d1bf0f..68fd150 100644 (file)
--- a/sysdeps/unix/sysv/linux/i386/libpthread.abilist
+++ b/sysdeps/unix/sysv/linux/i386/libpthread.abilist
@@ -192,6 +192,7 @@ GLIBC_2.2 pwrite F
 GLIBC_2.2 pwrite64 F
 GLIBC_2.2 sem_timedwait F
 GLIBC_2.2.3 pthread_getattr_np F
+GLIBC_2.2.6 __libpthread_version_placeholder F
 GLIBC_2.28 call_once F
 GLIBC_2.28 cnd_broadcast F
 GLIBC_2.28 cnd_destroy F

diff --git a/sysdeps/unix/sysv/linux/ia64/libpthread.abilist b/sysdeps/unix/sysv/linux/ia64/libpthread.abilist
index c065ddb..4c844da 100644 (file)
--- a/sysdeps/unix/sysv/linux/ia64/libpthread.abilist
+++ b/sysdeps/unix/sysv/linux/ia64/libpthread.abilist
@@ -18,7 +18,6 @@ GLIBC_2.2 __h_errno_location F
 GLIBC_2.2 __libc_allocate_rtsig F
 GLIBC_2.2 __libc_current_sigrtmax F
 GLIBC_2.2 __libc_current_sigrtmin F
-GLIBC_2.2 __libpthread_version_placeholder F
 GLIBC_2.2 __lseek F
 GLIBC_2.2 __open F
 GLIBC_2.2 __open64 F
@@ -185,6 +184,7 @@ GLIBC_2.2 wait F
 GLIBC_2.2 waitpid F
 GLIBC_2.2 write F
 GLIBC_2.2.3 pthread_getattr_np F
+GLIBC_2.2.6 __libpthread_version_placeholder F
 GLIBC_2.28 call_once F
 GLIBC_2.28 cnd_broadcast F
 GLIBC_2.28 cnd_destroy F

diff --git a/sysdeps/unix/sysv/linux/m68k/m680x0/libpthread.abilist b/sysdeps/unix/sysv/linux/m68k/m680x0/libpthread.abilist
index 5d1bf0f..68fd150 100644 (file)
--- a/sysdeps/unix/sysv/linux/m68k/m680x0/libpthread.abilist
+++ b/sysdeps/unix/sysv/linux/m68k/m680x0/libpthread.abilist
@@ -192,6 +192,7 @@ GLIBC_2.2 pwrite F
 GLIBC_2.2 pwrite64 F
 GLIBC_2.2 sem_timedwait F
 GLIBC_2.2.3 pthread_getattr_np F
+GLIBC_2.2.6 __libpthread_version_placeholder F
 GLIBC_2.28 call_once F
 GLIBC_2.28 cnd_broadcast F
 GLIBC_2.28 cnd_destroy F

diff --git a/sysdeps/unix/sysv/linux/mips/mips32/libpthread.abilist b/sysdeps/unix/sysv/linux/mips/mips32/libpthread.abilist
index 1b5fd5e..aefbfa4 100644 (file)
--- a/sysdeps/unix/sysv/linux/mips/mips32/libpthread.abilist
+++ b/sysdeps/unix/sysv/linux/mips/mips32/libpthread.abilist
@@ -117,7 +117,6 @@ GLIBC_2.18 pthread_setattr_default_np F
 GLIBC_2.2 __libc_allocate_rtsig F
 GLIBC_2.2 __libc_current_sigrtmax F
 GLIBC_2.2 __libc_current_sigrtmin F
-GLIBC_2.2 __libpthread_version_placeholder F
 GLIBC_2.2 __open64 F
 GLIBC_2.2 __pread64 F
 GLIBC_2.2 __pthread_rwlock_destroy F
@@ -192,6 +191,7 @@ GLIBC_2.2 sem_trywait F
 GLIBC_2.2 sem_unlink F
 GLIBC_2.2 sem_wait F
 GLIBC_2.2.3 pthread_getattr_np F
+GLIBC_2.2.6 __libpthread_version_placeholder F
 GLIBC_2.28 call_once F
 GLIBC_2.28 cnd_broadcast F
 GLIBC_2.28 cnd_destroy F

diff --git a/sysdeps/unix/sysv/linux/mips/mips64/libpthread.abilist b/sysdeps/unix/sysv/linux/mips/mips64/libpthread.abilist
index 1b5fd5e..aefbfa4 100644 (file)
--- a/sysdeps/unix/sysv/linux/mips/mips64/libpthread.abilist
+++ b/sysdeps/unix/sysv/linux/mips/mips64/libpthread.abilist
@@ -117,7 +117,6 @@ GLIBC_2.18 pthread_setattr_default_np F
 GLIBC_2.2 __libc_allocate_rtsig F
 GLIBC_2.2 __libc_current_sigrtmax F
 GLIBC_2.2 __libc_current_sigrtmin F
-GLIBC_2.2 __libpthread_version_placeholder F
 GLIBC_2.2 __open64 F
 GLIBC_2.2 __pread64 F
 GLIBC_2.2 __pthread_rwlock_destroy F
@@ -192,6 +191,7 @@ GLIBC_2.2 sem_trywait F
 GLIBC_2.2 sem_unlink F
 GLIBC_2.2 sem_wait F
 GLIBC_2.2.3 pthread_getattr_np F
+GLIBC_2.2.6 __libpthread_version_placeholder F
 GLIBC_2.28 call_once F
 GLIBC_2.28 cnd_broadcast F
 GLIBC_2.28 cnd_destroy F

diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/libpthread.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc32/libpthread.abilist
index 0245103..88d6d73 100644 (file)
--- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/libpthread.abilist
+++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/libpthread.abilist
@@ -192,6 +192,7 @@ GLIBC_2.2 pwrite F
 GLIBC_2.2 pwrite64 F
 GLIBC_2.2 sem_timedwait F
 GLIBC_2.2.3 pthread_getattr_np F
+GLIBC_2.2.6 __libpthread_version_placeholder F
 GLIBC_2.28 call_once F
 GLIBC_2.28 cnd_broadcast F
 GLIBC_2.28 cnd_destroy F

diff --git a/sysdeps/unix/sysv/linux/s390/s390-32/libpthread.abilist b/sysdeps/unix/sysv/linux/s390/s390-32/libpthread.abilist
index 429d8b6..bfa1d5e 100644 (file)
--- a/sysdeps/unix/sysv/linux/s390/s390-32/libpthread.abilist
+++ b/sysdeps/unix/sysv/linux/s390/s390-32/libpthread.abilist
@@ -194,6 +194,7 @@ GLIBC_2.2 pwrite F
 GLIBC_2.2 pwrite64 F
 GLIBC_2.2 sem_timedwait F
 GLIBC_2.2.3 pthread_getattr_np F
+GLIBC_2.2.6 __libpthread_version_placeholder F
 GLIBC_2.28 call_once F
 GLIBC_2.28 cnd_broadcast F
 GLIBC_2.28 cnd_destroy F

diff --git a/sysdeps/unix/sysv/linux/s390/s390-64/libpthread.abilist b/sysdeps/unix/sysv/linux/s390/s390-64/libpthread.abilist
index d42e1fc..8cf9afe 100644 (file)
--- a/sysdeps/unix/sysv/linux/s390/s390-64/libpthread.abilist
+++ b/sysdeps/unix/sysv/linux/s390/s390-64/libpthread.abilist
@@ -20,7 +20,6 @@ GLIBC_2.2 __h_errno_location F
 GLIBC_2.2 __libc_allocate_rtsig F
 GLIBC_2.2 __libc_current_sigrtmax F
 GLIBC_2.2 __libc_current_sigrtmin F
-GLIBC_2.2 __libpthread_version_placeholder F
 GLIBC_2.2 __lseek F
 GLIBC_2.2 __open F
 GLIBC_2.2 __open64 F
@@ -187,6 +186,7 @@ GLIBC_2.2 wait F
 GLIBC_2.2 waitpid F
 GLIBC_2.2 write F
 GLIBC_2.2.3 pthread_getattr_np F
+GLIBC_2.2.6 __libpthread_version_placeholder F
 GLIBC_2.28 call_once F
 GLIBC_2.28 cnd_broadcast F
 GLIBC_2.28 cnd_destroy F

diff --git a/sysdeps/unix/sysv/linux/sh/be/libpthread.abilist b/sysdeps/unix/sysv/linux/sh/be/libpthread.abilist
index d87fadf..15b72c4 100644 (file)
--- a/sysdeps/unix/sysv/linux/sh/be/libpthread.abilist
+++ b/sysdeps/unix/sysv/linux/sh/be/libpthread.abilist
@@ -18,7 +18,6 @@ GLIBC_2.2 __h_errno_location F
 GLIBC_2.2 __libc_allocate_rtsig F
 GLIBC_2.2 __libc_current_sigrtmax F
 GLIBC_2.2 __libc_current_sigrtmin F
-GLIBC_2.2 __libpthread_version_placeholder F
 GLIBC_2.2 __lseek F
 GLIBC_2.2 __open F
 GLIBC_2.2 __open64 F
@@ -185,6 +184,7 @@ GLIBC_2.2 wait F
 GLIBC_2.2 waitpid F
 GLIBC_2.2 write F
 GLIBC_2.2.3 pthread_getattr_np F
+GLIBC_2.2.6 __libpthread_version_placeholder F
 GLIBC_2.28 call_once F
 GLIBC_2.28 cnd_broadcast F
 GLIBC_2.28 cnd_destroy F

diff --git a/sysdeps/unix/sysv/linux/sh/le/libpthread.abilist b/sysdeps/unix/sysv/linux/sh/le/libpthread.abilist
index d87fadf..15b72c4 100644 (file)
--- a/sysdeps/unix/sysv/linux/sh/le/libpthread.abilist
+++ b/sysdeps/unix/sysv/linux/sh/le/libpthread.abilist
@@ -18,7 +18,6 @@ GLIBC_2.2 __h_errno_location F
 GLIBC_2.2 __libc_allocate_rtsig F
 GLIBC_2.2 __libc_current_sigrtmax F
 GLIBC_2.2 __libc_current_sigrtmin F
-GLIBC_2.2 __libpthread_version_placeholder F
 GLIBC_2.2 __lseek F
 GLIBC_2.2 __open F
 GLIBC_2.2 __open64 F
@@ -185,6 +184,7 @@ GLIBC_2.2 wait F
 GLIBC_2.2 waitpid F
 GLIBC_2.2 write F
 GLIBC_2.2.3 pthread_getattr_np F
+GLIBC_2.2.6 __libpthread_version_placeholder F
 GLIBC_2.28 call_once F
 GLIBC_2.28 cnd_broadcast F
 GLIBC_2.28 cnd_destroy F

diff --git a/sysdeps/unix/sysv/linux/sparc/sparc32/libpthread.abilist b/sysdeps/unix/sysv/linux/sparc/sparc32/libpthread.abilist
index f42bcff..da5e997 100644 (file)
--- a/sysdeps/unix/sysv/linux/sparc/sparc32/libpthread.abilist
+++ b/sysdeps/unix/sysv/linux/sparc/sparc32/libpthread.abilist
@@ -192,6 +192,7 @@ GLIBC_2.2 pwrite F
 GLIBC_2.2 pwrite64 F
 GLIBC_2.2 sem_timedwait F
 GLIBC_2.2.3 pthread_getattr_np F
+GLIBC_2.2.6 __libpthread_version_placeholder F
 GLIBC_2.28 call_once F
 GLIBC_2.28 cnd_broadcast F
 GLIBC_2.28 cnd_destroy F

diff --git a/sysdeps/unix/sysv/linux/sparc/sparc64/libpthread.abilist b/sysdeps/unix/sysv/linux/sparc/sparc64/libpthread.abilist
index c065ddb..4c844da 100644 (file)
--- a/sysdeps/unix/sysv/linux/sparc/sparc64/libpthread.abilist
+++ b/sysdeps/unix/sysv/linux/sparc/sparc64/libpthread.abilist
@@ -18,7 +18,6 @@ GLIBC_2.2 __h_errno_location F
 GLIBC_2.2 __libc_allocate_rtsig F
 GLIBC_2.2 __libc_current_sigrtmax F
 GLIBC_2.2 __libc_current_sigrtmin F
-GLIBC_2.2 __libpthread_version_placeholder F
 GLIBC_2.2 __lseek F
 GLIBC_2.2 __open F
 GLIBC_2.2 __open64 F
@@ -185,6 +184,7 @@ GLIBC_2.2 wait F
 GLIBC_2.2 waitpid F
 GLIBC_2.2 write F
 GLIBC_2.2.3 pthread_getattr_np F
+GLIBC_2.2.6 __libpthread_version_placeholder F
 GLIBC_2.28 call_once F
 GLIBC_2.28 cnd_broadcast F
 GLIBC_2.28 cnd_destroy F

diff --git a/sysdeps/unix/sysv/linux/x86_64/64/libpthread.abilist b/sysdeps/unix/sysv/linux/x86_64/64/libpthread.abilist
index 610562b..a46fcc6 100644 (file)
--- a/sysdeps/unix/sysv/linux/x86_64/64/libpthread.abilist
+++ b/sysdeps/unix/sysv/linux/x86_64/64/libpthread.abilist
@@ -18,7 +18,6 @@ GLIBC_2.2.5 __h_errno_location F
 GLIBC_2.2.5 __libc_allocate_rtsig F
 GLIBC_2.2.5 __libc_current_sigrtmax F
 GLIBC_2.2.5 __libc_current_sigrtmin F
-GLIBC_2.2.5 __libpthread_version_placeholder F
 GLIBC_2.2.5 __lseek F
 GLIBC_2.2.5 __open F
 GLIBC_2.2.5 __open64 F
@@ -185,6 +184,7 @@ GLIBC_2.2.5 tcdrain F
 GLIBC_2.2.5 wait F
 GLIBC_2.2.5 waitpid F
 GLIBC_2.2.5 write F
+GLIBC_2.2.6 __libpthread_version_placeholder F
 GLIBC_2.28 call_once F
 GLIBC_2.28 cnd_broadcast F
 GLIBC_2.28 cnd_destroy F