diff options
70 files changed, 165 insertions, 827 deletions
@@ -1,3 +1,84 @@ +2016-11-24 Adhemerval Zanella <adhemerval.zanella@linaro.org> + + * sysdeps/nptl/fork.c (__libc_fork): Remove pid cache setting. + * nptl/allocatestack.c (allocate_stack): Likewise. + (__reclaim_stacks): Likewise. + (setxid_signal_thread): Obtain pid through syscall. + * nptl/nptl-init.c (sigcancel_handler): Likewise. + (sighandle_setxid): Likewise. + * nptl/pthread_cancel.c (pthread_cancel): Likewise. + * sysdeps/unix/sysv/linux/pthread_kill.c (__pthread_kill): Likewise. + * sysdeps/unix/sysv/linux/pthread_sigqueue.c (pthread_sigqueue): + Likewise. + * sysdeps/unix/sysv/linux/createthread.c (create_thread): Likewise. + * sysdeps/unix/sysv/linux/raise.c (raise): Remove old behaviour + comment. + * sysdeps/unix/sysv/linux/getpid.c: Remove file. + * nptl/descr.h (struct pthread): Change comment about pid value. + * nptl/pthread_getattr_np.c (pthread_getattr_np): Remove thread + pid assert. + * sysdeps/unix/sysv/linux/pthread-pids.h (__pthread_initialize_pids): + Do not set pid value. + * nptl_db/td_ta_thr_iter.c (iterate_thread_list): Remove thread + pid cache check. + * nptl_db/td_thr_validate.c (td_thr_validate): Likewise. + * sysdeps/aarch64/nptl/tcb-offsets.sym: Remove pid offset. + * sysdeps/alpha/nptl/tcb-offsets.sym: Likewise. + * sysdeps/arm/nptl/tcb-offsets.sym: Likewise. + * sysdeps/hppa/nptl/tcb-offsets.sym: Likewise. + * sysdeps/i386/nptl/tcb-offsets.sym: Likewise. + * sysdeps/ia64/nptl/tcb-offsets.sym: Likewise. + * sysdeps/m68k/nptl/tcb-offsets.sym: Likewise. + * sysdeps/microblaze/nptl/tcb-offsets.sym: Likewise. + * sysdeps/mips/nptl/tcb-offsets.sym: Likewise. + * sysdeps/nios2/nptl/tcb-offsets.sym: Likewise. + * sysdeps/powerpc/nptl/tcb-offsets.sym: Likewise. + * sysdeps/s390/nptl/tcb-offsets.sym: Likewise. + * sysdeps/sh/nptl/tcb-offsets.sym: Likewise. + * sysdeps/sparc/nptl/tcb-offsets.sym: Likewise. + * sysdeps/tile/nptl/tcb-offsets.sym: Likewise. + * sysdeps/x86_64/nptl/tcb-offsets.sym: Likewise. + * sysdeps/unix/sysv/linux/aarch64/clone.S: Remove pid and tid caching. + * sysdeps/unix/sysv/linux/alpha/clone.S: Likewise. + * sysdeps/unix/sysv/linux/arm/clone.S: Likewise. + * sysdeps/unix/sysv/linux/hppa/clone.S: Likewise. + * sysdeps/unix/sysv/linux/i386/clone.S: Likewise. + * sysdeps/unix/sysv/linux/ia64/clone2.S: Likewise. + * sysdeps/unix/sysv/linux/mips/clone.S: Likewise. + * sysdeps/unix/sysv/linux/nios2/clone.S: Likewise. + * sysdeps/unix/sysv/linux/powerpc/powerpc32/clone.S: Likewise. + * sysdeps/unix/sysv/linux/powerpc/powerpc64/clone.S: Likewise. + * sysdeps/unix/sysv/linux/s390/s390-32/clone.S: Likewise. + * sysdeps/unix/sysv/linux/s390/s390-64/clone.S: Likewise. + * sysdeps/unix/sysv/linux/sh/clone.S: Likewise. + * sysdeps/unix/sysv/linux/sparc/sparc32/clone.S: Likewise. + * sysdeps/unix/sysv/linux/sparc/sparc64/clone.S: Likewise. + * sysdeps/unix/sysv/linux/tile/clone.S: Likewise. + * sysdeps/unix/sysv/linux/x86_64/clone.S: Likewise. + * sysdeps/unix/sysv/linux/aarch64/vfork.S: Remove pid set and reset. + * sysdeps/unix/sysv/linux/alpha/vfork.S: Likewise. + * sysdeps/unix/sysv/linux/arm/vfork.S: Likewise. + * sysdeps/unix/sysv/linux/i386/vfork.S: Likewise. + * sysdeps/unix/sysv/linux/ia64/vfork.S: Likewise. + * sysdeps/unix/sysv/linux/m68k/clone.S: Likewise. + * sysdeps/unix/sysv/linux/m68k/vfork.S: Likewise. + * sysdeps/unix/sysv/linux/mips/vfork.S: Likewise. + * sysdeps/unix/sysv/linux/nios2/vfork.S: Likewise. + * sysdeps/unix/sysv/linux/powerpc/powerpc32/vfork.S: Likewise. + * sysdeps/unix/sysv/linux/powerpc/powerpc64/vfork.S: Likewise. + * sysdeps/unix/sysv/linux/s390/s390-32/vfork.S: Likewise. + * sysdeps/unix/sysv/linux/s390/s390-64/vfork.S: Likewise. + * sysdeps/unix/sysv/linux/sh/vfork.S: Likewise. + * sysdeps/unix/sysv/linux/sparc/sparc32/vfork.S: Likewise. + * sysdeps/unix/sysv/linux/sparc/sparc64/vfork.S: Likewise. + * sysdeps/unix/sysv/linux/tile/vfork.S: Likewise. + * sysdeps/unix/sysv/linux/x86_64/vfork.S: Likewise. + * sysdeps/unix/sysv/linux/hppa/pt-vfork.S: Likewise. + * sysdeps/unix/sysv/linux/tst-clone2.c (f): Remove direct pthread + struct access. + (clone_test): Remove function. + (do_test): Rewrite to take in consideration pid is not cached anymore. + 2016-11-24 Joseph Myers <joseph@codesourcery.com> * bits/flt-eval-method.h: New file. diff --git a/nptl/allocatestack.c b/nptl/allocatestack.c index 3016a2e..98a0ea2 100644 --- a/nptl/allocatestack.c +++ b/nptl/allocatestack.c @@ -438,9 +438,6 @@ allocate_stack (const struct pthread_attr *attr, struct pthread **pdp, SETUP_THREAD_SYSINFO (pd); #endif - /* The process ID is also the same as that of the caller. */ - pd->pid = THREAD_GETMEM (THREAD_SELF, pid); - /* Don't allow setxid until cloned. */ pd->setxid_futex = -1; @@ -577,9 +574,6 @@ allocate_stack (const struct pthread_attr *attr, struct pthread **pdp, /* Don't allow setxid until cloned. */ pd->setxid_futex = -1; - /* The process ID is also the same as that of the caller. */ - pd->pid = THREAD_GETMEM (THREAD_SELF, pid); - /* Allocate the DTV for this thread. */ if (_dl_allocate_tls (TLS_TPADJ (pd)) == NULL) { @@ -873,9 +867,6 @@ __reclaim_stacks (void) /* This marks the stack as free. */ curp->tid = 0; - /* The PID field must be initialized for the new process. */ - curp->pid = self->pid; - /* Account for the size of the stack. */ stack_cache_actsize += curp->stackblock_size; @@ -901,13 +892,6 @@ __reclaim_stacks (void) } } - /* Reset the PIDs in any cached stacks. */ - list_for_each (runp, &stack_cache) - { - struct pthread *curp = list_entry (runp, struct pthread, list); - curp->pid = self->pid; - } - /* Add the stack of all running threads to the cache. */ list_splice (&stack_used, &stack_cache); @@ -1052,9 +1036,9 @@ setxid_signal_thread (struct xid_command *cmdp, struct pthread *t) return 0; int val; + pid_t pid = __getpid (); INTERNAL_SYSCALL_DECL (err); - val = INTERNAL_SYSCALL (tgkill, err, 3, THREAD_GETMEM (THREAD_SELF, pid), - t->tid, SIGSETXID); + val = INTERNAL_SYSCALL_CALL (tgkill, err, pid, t->tid, SIGSETXID); /* If this failed, it must have had not started yet or else exited. */ if (!INTERNAL_SYSCALL_ERROR_P (val, err)) diff --git a/nptl/descr.h b/nptl/descr.h index 8e4938d..bc92abf 100644 --- a/nptl/descr.h +++ b/nptl/descr.h @@ -167,8 +167,8 @@ struct pthread therefore stack) used' flag. */ pid_t tid; - /* Process ID - thread group ID in kernel speak. */ - pid_t pid; + /* Ununsed. */ + pid_t pid_ununsed; /* List of robust mutexes the thread is holding. */ #ifdef __PTHREAD_MUTEX_HAVE_PREV diff --git a/nptl/nptl-init.c b/nptl/nptl-init.c index bdbdfed..48fab50 100644 --- a/nptl/nptl-init.c +++ b/nptl/nptl-init.c @@ -184,18 +184,12 @@ __nptl_set_robust (struct pthread *self) static void sigcancel_handler (int sig, siginfo_t *si, void *ctx) { - /* Determine the process ID. It might be negative if the thread is - in the middle of a fork() call. */ - pid_t pid = THREAD_GETMEM (THREAD_SELF, pid); - if (__glibc_unlikely (pid < 0)) - pid = -pid; - /* Safety check. It would be possible to call this function for other signals and send a signal from another process. This is not correct and might even be a security problem. Try to catch as many incorrect invocations as possible. */ if (sig != SIGCANCEL - || si->si_pid != pid + || si->si_pid != __getpid() || si->si_code != SI_TKILL) return; @@ -243,19 +237,14 @@ struct xid_command *__xidcmd attribute_hidden; static void sighandler_setxid (int sig, siginfo_t *si, void *ctx) { - /* Determine the process ID. It might be negative if the thread is - in the middle of a fork() call. */ - pid_t pid = THREAD_GETMEM (THREAD_SELF, pid); int result; - if (__glibc_unlikely (pid < 0)) - pid = -pid; /* Safety check. It would be possible to call this function for other signals and send a signal from another process. This is not correct and might even be a security problem. Try to catch as many incorrect invocations as possible. */ if (sig != SIGSETXID - || si->si_pid != pid + || si->si_pid != __getpid () || si->si_code != SI_TKILL) return; diff --git a/nptl/pthread_cancel.c b/nptl/pthread_cancel.c index 1419baf..89d02e1 100644 --- a/nptl/pthread_cancel.c +++ b/nptl/pthread_cancel.c @@ -22,7 +22,7 @@ #include "pthreadP.h" #include <atomic.h> #include <sysdep.h> - +#include <unistd.h> int pthread_cancel (pthread_t th) @@ -66,19 +66,11 @@ pthread_cancel (pthread_t th) #ifdef SIGCANCEL /* The cancellation handler will take care of marking the thread as canceled. */ - INTERNAL_SYSCALL_DECL (err); - - /* One comment: The PID field in the TCB can temporarily be - changed (in fork). But this must not affect this code - here. Since this function would have to be called while - the thread is executing fork, it would have to happen in - a signal handler. But this is no allowed, pthread_cancel - is not guaranteed to be async-safe. */ - int val; - val = INTERNAL_SYSCALL (tgkill, err, 3, - THREAD_GETMEM (THREAD_SELF, pid), pd->tid, - SIGCANCEL); + pid_t pid = getpid (); + INTERNAL_SYSCALL_DECL (err); + int val = INTERNAL_SYSCALL_CALL (tgkill, err, pid, pd->tid, + SIGCANCEL); if (INTERNAL_SYSCALL_ERROR_P (val, err)) result = INTERNAL_SYSCALL_ERRNO (val, err); #else diff --git a/nptl/pthread_getattr_np.c b/nptl/pthread_getattr_np.c index fb906f0..32d7484 100644 --- a/nptl/pthread_getattr_np.c +++ b/nptl/pthread_getattr_np.c @@ -68,7 +68,6 @@ pthread_getattr_np (pthread_t thread_id, pthread_attr_t *attr) { /* No stack information available. This must be for the initial thread. Get the info in some magical way. */ - assert (abs (thread->pid) == thread->tid); /* Stack size limit. */ struct rlimit rl; diff --git a/nptl_db/structs.def b/nptl_db/structs.def index a9b621b..1cb6a46 100644 --- a/nptl_db/structs.def +++ b/nptl_db/structs.def @@ -48,7 +48,6 @@ DB_STRUCT (pthread) DB_STRUCT_FIELD (pthread, list) DB_STRUCT_FIELD (pthread, report_events) DB_STRUCT_FIELD (pthread, tid) -DB_STRUCT_FIELD (pthread, pid) DB_STRUCT_FIELD (pthread, start_routine) DB_STRUCT_FIELD (pthread, cancelhandling) DB_STRUCT_FIELD (pthread, schedpolicy) diff --git a/nptl_db/td_ta_thr_iter.c b/nptl_db/td_ta_thr_iter.c index a990fed..9e50599 100644 --- a/nptl_db/td_ta_thr_iter.c +++ b/nptl_db/td_ta_thr_iter.c @@ -76,48 +76,28 @@ iterate_thread_list (td_thragent_t *ta, td_thr_iter_f *callback, if (ps_pdread (ta->ph, addr, copy, ta->ta_sizeof_pthread) != PS_OK) return TD_ERR; - /* Verify that this thread's pid field matches the child PID. - If its pid field is negative, it's about to do a fork or it - is the sole thread in a fork child. */ - psaddr_t pid; - err = DB_GET_FIELD_LOCAL (pid, ta, copy, pthread, pid, 0); - if (err == TD_OK && (pid_t) (uintptr_t) pid < 0) - { - if (-(pid_t) (uintptr_t) pid == match_pid) - /* It is about to do a fork, but is really still the parent PID. */ - pid = (psaddr_t) (uintptr_t) match_pid; - else - /* It must be a fork child, whose new PID is in the tid field. */ - err = DB_GET_FIELD_LOCAL (pid, ta, copy, pthread, tid, 0); - } + err = DB_GET_FIELD_LOCAL (schedpolicy, ta, copy, pthread, + schedpolicy, 0); if (err != TD_OK) break; + err = DB_GET_FIELD_LOCAL (schedprio, ta, copy, pthread, + schedparam_sched_priority, 0); + if (err != TD_OK) + break; + + /* Now test whether this thread matches the specified conditions. */ - if ((pid_t) (uintptr_t) pid == match_pid) + /* Only if the priority level is as high or higher. */ + int descr_pri = ((uintptr_t) schedpolicy == SCHED_OTHER + ? 0 : (uintptr_t) schedprio); + if (descr_pri >= ti_pri) { - err = DB_GET_FIELD_LOCAL (schedpolicy, ta, copy, pthread, - schedpolicy, 0); - if (err != TD_OK) - break; - err = DB_GET_FIELD_LOCAL (schedprio, ta, copy, pthread, - schedparam_sched_priority, 0); - if (err != TD_OK) - break; - - /* Now test whether this thread matches the specified conditions. */ - - /* Only if the priority level is as high or higher. */ - int descr_pri = ((uintptr_t) schedpolicy == SCHED_OTHER - ? 0 : (uintptr_t) schedprio); - if (descr_pri >= ti_pri) - { - /* Yep, it matches. Call the callback function. */ - td_thrhandle_t th; - th.th_ta_p = (td_thragent_t *) ta; - th.th_unique = addr; - if (callback (&th, cbdata_p) != 0) - return TD_DBERR; - } + /* Yep, it matches. Call the callback function. */ + td_thrhandle_t th; + th.th_ta_p = (td_thragent_t *) ta; + th.th_unique = addr; + if (callback (&th, cbdata_p) != 0) + return TD_DBERR; } /* Get the pointer to the next element. */ diff --git a/nptl_db/td_thr_validate.c b/nptl_db/td_thr_validate.c index f3c8a7b..9b89fec 100644 --- a/nptl_db/td_thr_validate.c +++ b/nptl_db/td_thr_validate.c @@ -80,28 +80,5 @@ td_thr_validate (const td_thrhandle_t *th) err = TD_OK; } - if (err == TD_OK) - { - /* Verify that this is not a stale element in a fork child. */ - pid_t match_pid = ps_getpid (th->th_ta_p->ph); - psaddr_t pid; - err = DB_GET_FIELD (pid, th->th_ta_p, th->th_unique, pthread, pid, 0); - if (err == TD_OK && (pid_t) (uintptr_t) pid < 0) - { - /* This was a thread that was about to fork, or it is the new sole - thread in a fork child. In the latter case, its tid was stored - via CLONE_CHILD_SETTID and so is already the proper child PID. */ - if (-(pid_t) (uintptr_t) pid == match_pid) - /* It is about to do a fork, but is really still the parent PID. */ - pid = (psaddr_t) (uintptr_t) match_pid; - else - /* It must be a fork child, whose new PID is in the tid field. */ - err = DB_GET_FIELD (pid, th->th_ta_p, th->th_unique, - pthread, tid, 0); - } - if (err == TD_OK && (pid_t) (uintptr_t) pid != match_pid) - err = TD_NOTHR; - } - return err; } diff --git a/sysdeps/aarch64/nptl/tcb-offsets.sym b/sysdeps/aarch64/nptl/tcb-offsets.sym index 0677aea..238647d 100644 --- a/sysdeps/aarch64/nptl/tcb-offsets.sym +++ b/sysdeps/aarch64/nptl/tcb-offsets.sym @@ -2,6 +2,5 @@ #include <tls.h> PTHREAD_MULTIPLE_THREADS_OFFSET offsetof (struct pthread, header.multiple_threads) -PTHREAD_PID_OFFSET offsetof (struct pthread, pid) PTHREAD_TID_OFFSET offsetof (struct pthread, tid) PTHREAD_SIZEOF sizeof (struct pthread) diff --git a/sysdeps/alpha/nptl/tcb-offsets.sym b/sysdeps/alpha/nptl/tcb-offsets.sym index c21a791..1005621 100644 --- a/sysdeps/alpha/nptl/tcb-offsets.sym +++ b/sysdeps/alpha/nptl/tcb-offsets.sym @@ -10,5 +10,4 @@ #define thread_offsetof(mem) (long)(offsetof(struct pthread, mem) - sizeof(struct pthread)) MULTIPLE_THREADS_OFFSET thread_offsetof (header.multiple_threads) -PID_OFFSET thread_offsetof (pid) TID_OFFSET thread_offsetof (tid) diff --git a/sysdeps/arm/nptl/tcb-offsets.sym b/sysdeps/arm/nptl/tcb-offsets.sym index 92cc441..bf9c0a1 100644 --- a/sysdeps/arm/nptl/tcb-offsets.sym +++ b/sysdeps/arm/nptl/tcb-offsets.sym @@ -7,5 +7,4 @@ #define thread_offsetof(mem) (long)(offsetof(struct pthread, mem) - sizeof(struct pthread)) MULTIPLE_THREADS_OFFSET thread_offsetof (header.multiple_threads) -PID_OFFSET thread_offsetof (pid) TID_OFFSET thread_offsetof (tid) diff --git a/sysdeps/hppa/nptl/tcb-offsets.sym b/sysdeps/hppa/nptl/tcb-offsets.sym index c2f326e..6e852f3 100644 --- a/sysdeps/hppa/nptl/tcb-offsets.sym +++ b/sysdeps/hppa/nptl/tcb-offsets.sym @@ -3,7 +3,6 @@ RESULT offsetof (struct pthread, result) TID offsetof (struct pthread, tid) -PID offsetof (struct pthread, pid) CANCELHANDLING offsetof (struct pthread, cancelhandling) CLEANUP_JMP_BUF offsetof (struct pthread, cleanup_jmp_buf) MULTIPLE_THREADS_OFFSET offsetof (struct pthread, header.multiple_threads) @@ -14,6 +13,5 @@ MUTEX_FUTEX offsetof (pthread_mutex_t, __data.__lock) -- This way we get the offset of a member in the struct pthread that -- preceeds the thread pointer (which points to the dtv). #define thread_offsetof(mem) (unsigned int)(offsetof(struct pthread, mem) - sizeof(struct pthread)) -PID_THREAD_OFFSET thread_offsetof (pid) TID_THREAD_OFFSET thread_offsetof (tid) MULTIPLE_THREADS_THREAD_OFFSET thread_offsetof (header.multiple_threads) diff --git a/sysdeps/i386/nptl/tcb-offsets.sym b/sysdeps/i386/nptl/tcb-offsets.sym index 7bdf161..695a810 100644 --- a/sysdeps/i386/nptl/tcb-offsets.sym +++ b/sysdeps/i386/nptl/tcb-offsets.sym @@ -4,7 +4,6 @@ RESULT offsetof (struct pthread, result) TID offsetof (struct pthread, tid) -PID offsetof (struct pthread, pid) CANCELHANDLING offsetof (struct pthread, cancelhandling) CLEANUP_JMP_BUF offsetof (struct pthread, cleanup_jmp_buf) MULTIPLE_THREADS_OFFSET offsetof (tcbhead_t, multiple_threads) diff --git a/sysdeps/ia64/nptl/tcb-offsets.sym b/sysdeps/ia64/nptl/tcb-offsets.sym index e1707ab..b01f712 100644 --- a/sysdeps/ia64/nptl/tcb-offsets.sym +++ b/sysdeps/ia64/nptl/tcb-offsets.sym @@ -1,7 +1,6 @@ #include <sysdep.h> #include <tls.h> -PID offsetof (struct pthread, pid) - TLS_PRE_TCB_SIZE TID offsetof (struct pthread, tid) - TLS_PRE_TCB_SIZE MULTIPLE_THREADS_OFFSET offsetof (struct pthread, header.multiple_threads) - TLS_PRE_TCB_SIZE SYSINFO_OFFSET offsetof (tcbhead_t, __private) diff --git a/sysdeps/m68k/nptl/tcb-offsets.sym b/sysdeps/m68k/nptl/tcb-offsets.sym index b1bba65..241fb8b 100644 --- a/sysdeps/m68k/nptl/tcb-offsets.sym +++ b/sysdeps/m68k/nptl/tcb-offsets.sym @@ -7,5 +7,4 @@ #define thread_offsetof(mem) (long)(offsetof(struct pthread, mem) - TLS_TCB_OFFSET - TLS_PRE_TCB_SIZE) MULTIPLE_THREADS_OFFSET thread_offsetof (header.multiple_threads) -PID_OFFSET thread_offsetof (pid) TID_OFFSET thread_offsetof (tid) diff --git a/sysdeps/microblaze/nptl/tcb-offsets.sym b/sysdeps/microblaze/nptl/tcb-offsets.sym index 18afbee..614f0df 100644 --- a/sysdeps/microblaze/nptl/tcb-offsets.sym +++ b/sysdeps/microblaze/nptl/tcb-offsets.sym @@ -7,5 +7,4 @@ #define thread_offsetof(mem) (long)(offsetof (struct pthread, mem) - sizeof (struct pthread)) MULTIPLE_THREADS_OFFSET thread_offsetof (header.multiple_threads) -PID_OFFSET thread_offsetof (pid) TID_OFFSET thread_offsetof (tid) diff --git a/sysdeps/mips/nptl/tcb-offsets.sym b/sysdeps/mips/nptl/tcb-offsets.sym index e0e71dc..9ea25b9 100644 --- a/sysdeps/mips/nptl/tcb-offsets.sym +++ b/sysdeps/mips/nptl/tcb-offsets.sym @@ -7,5 +7,4 @@ #define thread_offsetof(mem) (long)(offsetof(struct pthread, mem) - TLS_TCB_OFFSET - TLS_PRE_TCB_SIZE) MULTIPLE_THREADS_OFFSET thread_offsetof (header.multiple_threads) -PID_OFFSET thread_offsetof (pid) TID_OFFSET thread_offsetof (tid) diff --git a/sysdeps/nios2/nptl/tcb-offsets.sym b/sysdeps/nios2/nptl/tcb-offsets.sym index d9ae952..3cd8d98 100644 --- a/sysdeps/nios2/nptl/tcb-offsets.sym +++ b/sysdeps/nios2/nptl/tcb-offsets.sym @@ -9,6 +9,5 @@ # define thread_offsetof(mem) ((ptrdiff_t) THREAD_SELF + offsetof (struct pthread, mem)) MULTIPLE_THREADS_OFFSET thread_offsetof (header.multiple_threads) -PID_OFFSET thread_offsetof (pid) TID_OFFSET thread_offsetof (tid) POINTER_GUARD (offsetof (tcbhead_t, pointer_guard) - TLS_TCB_OFFSET - sizeof (tcbhead_t)) diff --git a/sysdeps/nptl/fork.c b/sysdeps/nptl/fork.c index ea135f8..32cecce 100644 --- a/sysdeps/nptl/fork.c +++ b/sysdeps/nptl/fork.c @@ -135,12 +135,6 @@ __libc_fork (void) pid_t ppid = THREAD_GETMEM (THREAD_SELF, tid); #endif - /* We need to prevent the getpid() code to update the PID field so - that, if a signal arrives in the child very early and the signal - handler uses getpid(), the value returned is correct. */ - pid_t parentpid = THREAD_GETMEM (THREAD_SELF, pid); - THREAD_SETMEM (THREAD_SELF, pid, -parentpid); - #ifdef ARCH_FORK pid = ARCH_FORK (); #else @@ -159,9 +153,6 @@ __libc_fork (void) if (__fork_generation_pointer != NULL) *__fork_generation_pointer += __PTHREAD_ONCE_FORK_GEN_INCR; - /* Adjust the PID field for the new process. */ - THREAD_SETMEM (self, pid, THREAD_GETMEM (self, tid)); - #if HP_TIMING_AVAIL /* The CPU clock of the thread and process have to be set to zero. */ hp_timing_t now; @@ -233,9 +224,6 @@ __libc_fork (void) { assert (THREAD_GETMEM (THREAD_SELF, tid) == ppid); - /* Restore the PID value. */ - THREAD_SETMEM (THREAD_SELF, pid, parentpid); - /* Release acquired locks in the multi-threaded case. */ if (multiple_threads) { diff --git a/sysdeps/powerpc/nptl/tcb-offsets.sym b/sysdeps/powerpc/nptl/tcb-offsets.sym index f580e69..7c9fd33 100644 --- a/sysdeps/powerpc/nptl/tcb-offsets.sym +++ b/sysdeps/powerpc/nptl/tcb-offsets.sym @@ -13,7 +13,6 @@ #if TLS_MULTIPLE_THREADS_IN_TCB MULTIPLE_THREADS_OFFSET thread_offsetof (header.multiple_threads) #endif -PID thread_offsetof (pid) TID thread_offsetof (tid) POINTER_GUARD (offsetof (tcbhead_t, pointer_guard) - TLS_TCB_OFFSET - sizeof (tcbhead_t)) TAR_SAVE (offsetof (tcbhead_t, tar_save) - TLS_TCB_OFFSET - sizeof (tcbhead_t)) diff --git a/sysdeps/s390/nptl/tcb-offsets.sym b/sysdeps/s390/nptl/tcb-offsets.sym index 9cfae21..9c1c01f 100644 --- a/sysdeps/s390/nptl/tcb-offsets.sym +++ b/sysdeps/s390/nptl/tcb-offsets.sym @@ -3,5 +3,4 @@ MULTIPLE_THREADS_OFFSET offsetof (tcbhead_t, multiple_threads) STACK_GUARD offsetof (tcbhead_t, stack_guard) -PID offsetof (struct pthread, pid) TID offsetof (struct pthread, tid) diff --git a/sysdeps/sh/nptl/tcb-offsets.sym b/sysdeps/sh/nptl/tcb-offsets.sym index ac63b5b..4963e15 100644 --- a/sysdeps/sh/nptl/tcb-offsets.sym +++ b/sysdeps/sh/nptl/tcb-offsets.sym @@ -4,7 +4,6 @@ RESULT offsetof (struct pthread, result) TID offsetof (struct pthread, tid) -PID offsetof (struct pthread, pid) CANCELHANDLING offsetof (struct pthread, cancelhandling) CLEANUP_JMP_BUF offsetof (struct pthread, cleanup_jmp_buf) MULTIPLE_THREADS_OFFSET offsetof (struct pthread, header.multiple_threads) diff --git a/sysdeps/sparc/nptl/tcb-offsets.sym b/sysdeps/sparc/nptl/tcb-offsets.sym index 923af8a..f75d020 100644 --- a/sysdeps/sparc/nptl/tcb-offsets.sym +++ b/sysdeps/sparc/nptl/tcb-offsets.sym @@ -3,5 +3,4 @@ MULTIPLE_THREADS_OFFSET offsetof (tcbhead_t, multiple_threads) POINTER_GUARD offsetof (tcbhead_t, pointer_guard) -PID offsetof (struct pthread, pid) TID offsetof (struct pthread, tid) diff --git a/sysdeps/tile/nptl/tcb-offsets.sym b/sysdeps/tile/nptl/tcb-offsets.sym index 6740bc9..0147ffa 100644 --- a/sysdeps/tile/nptl/tcb-offsets.sym +++ b/sysdeps/tile/nptl/tcb-offsets.sym @@ -9,7 +9,6 @@ #define thread_offsetof(mem) (long)(offsetof(struct pthread, mem) - TLS_TCB_OFFSET - TLS_PRE_TCB_SIZE) MULTIPLE_THREADS_OFFSET thread_offsetof (header.multiple_threads) -PID_OFFSET thread_offsetof (pid) TID_OFFSET thread_offsetof (tid) POINTER_GUARD (offsetof (tcbhead_t, pointer_guard) - TLS_TCB_OFFSET - sizeof (tcbhead_t)) FEEDBACK_DATA_OFFSET (offsetof (tcbhead_t, feedback_data) - TLS_TCB_OFFSET - sizeof (tcbhead_t)) diff --git a/sysdeps/unix/sysv/linux/aarch64/clone.S b/sysdeps/unix/sysv/linux/aarch64/clone.S index 76baa7a..96482e5 100644 --- a/sysdeps/unix/sysv/linux/aarch64/clone.S +++ b/sysdeps/unix/sysv/linux/aarch64/clone.S @@ -72,16 +72,6 @@ thread_start: cfi_undefined (x30) mov x29, 0 - tbnz x11, #CLONE_VM_BIT, 1f - - mov x8, #SYS_ify(getpid) - svc 0x0 - mrs x1, tpidr_el0 - sub x1, x1, #PTHREAD_SIZEOF - str w0, [x1, #PTHREAD_PID_OFFSET] - str w0, [x1, #PTHREAD_TID_OFFSET] -1: - /* Pick the function arg and execute. */ mov x0, x12 blr x10 diff --git a/sysdeps/unix/sysv/linux/aarch64/vfork.S b/sysdeps/unix/sysv/linux/aarch64/vfork.S index 577895e..aeed0b2 100644 --- a/sysdeps/unix/sysv/linux/aarch64/vfork.S +++ b/sysdeps/unix/sysv/linux/aarch64/vfork.S @@ -27,27 +27,10 @@ ENTRY (__vfork) - /* Save the TCB-cached PID away in w3, and then negate the TCB - field. But if it's zero, set it to 0x80000000 instead. See - raise.c for the logic that relies on this value. */ - mrs x2, tpidr_el0 - sub x2, x2, #PTHREAD_SIZEOF - ldr w3, [x2, #PTHREAD_PID_OFFSET] - mov w1, #0x80000000 - negs w0, w3 - csel w0, w1, w0, eq - str w0, [x2, #PTHREAD_PID_OFFSET] - mov x0, #0x4111 /* CLONE_VM | CLONE_VFORK | SIGCHLD */ mov x1, sp DO_CALL (clone, 2) - /* Restore the original value of the TCB cache of the PID, if we're - the parent. But in the child (syscall return value equals zero), - leave things as they are. */ - cbz x0, 1f - str w3, [x2, #PTHREAD_PID_OFFSET] -1: cmn x0, #4095 b.cs .Lsyscall_error RET diff --git a/sysdeps/unix/sysv/linux/alpha/clone.S b/sysdeps/unix/sysv/linux/alpha/clone.S index 6a3154f..2757bf2 100644 --- a/sysdeps/unix/sysv/linux/alpha/clone.S +++ b/sysdeps/unix/sysv/linux/alpha/clone.S @@ -91,13 +91,6 @@ thread_start: cfi_def_cfa_register(fp) cfi_undefined(ra) - /* Check and see if we need to reset the PID. */ - ldq t0, 16(sp) - lda t1, CLONE_VM - and t0, t1, t2 - beq t2, 2f -1: - /* Load up the arguments. */ ldq pv, 0(sp) ldq a0, 8(sp) @@ -120,15 +113,6 @@ thread_start: halt .align 4 -2: - rduniq - mov v0, s0 - lda v0, __NR_getxpid - callsys -3: - stl v0, PID_OFFSET(s0) - stl v0, TID_OFFSET(s0) - br 1b cfi_endproc .end thread_start diff --git a/sysdeps/unix/sysv/linux/alpha/vfork.S b/sysdeps/unix/sysv/linux/alpha/vfork.S index 9fc199a..e5f7ed0 100644 --- a/sysdeps/unix/sysv/linux/alpha/vfork.S +++ b/sysdeps/unix/sysv/linux/alpha/vfork.S @@ -25,24 +25,9 @@ ENTRY(__libc_vfork) rduniq mov v0, a1 - /* Save the TCB-cached PID away in A2, and then negate the TCB - field. But if it's zero, set it to 0x80000000 instead. See - raise.c for the logic that relies on this value. */ - ldl a2, PID_OFFSET(v0) - ldah t0, -0x8000 - negl a2, t1 - cmovne a2, t1, t0 - stl t0, PID_OFFSET(v0); - lda v0, SYS_ify(vfork) call_pal PAL_callsys - /* Restore the original value of the TCB cache of the PID, if we're - the parent. But in the child (syscall return value equals zero), - leave things as they are. */ - beq v0, 1f - stl a2, PID_OFFSET(a1) -1: /* Normal error check and return. */ bne a3, SYSCALL_ERROR_LABEL ret diff --git a/sysdeps/unix/sysv/linux/arm/clone.S b/sysdeps/unix/sysv/linux/arm/clone.S index 7ff6818..4c6325d 100644 --- a/sysdeps/unix/sysv/linux/arm/clone.S +++ b/sysdeps/unix/sysv/linux/arm/clone.S @@ -70,16 +70,6 @@ PSEUDO_END (__clone) 1: .fnstart .cantunwind - tst ip, #CLONE_VM - bne 2f - GET_TLS (lr) - mov r1, r0 - ldr r7, =SYS_ify(getpid) - swi 0x0 - NEGOFF_ADJ_BASE (r1, TID_OFFSET) - str r0, NEGOFF_OFF1 (r1, TID_OFFSET) - str r0, NEGOFF_OFF2 (r1, PID_OFFSET, TID_OFFSET) -2: @ pick the function arg and call address off the stack and execute ldr r0, [sp, #4] ldr ip, [sp], #8 diff --git a/sysdeps/unix/sysv/linux/arm/vfork.S b/sysdeps/unix/sysv/linux/arm/vfork.S index 500f5ca..794372e 100644 --- a/sysdeps/unix/sysv/linux/arm/vfork.S +++ b/sysdeps/unix/sysv/linux/arm/vfork.S @@ -28,16 +28,6 @@ and the process ID of the new process to the old process. */ ENTRY (__vfork) - /* Save the PID value. */ - GET_TLS (r2) - NEGOFF_ADJ_BASE2 (r2, r0, PID_OFFSET) /* Save the TLS addr in r2. */ - ldr r3, NEGOFF_OFF1 (r2, PID_OFFSET) /* Load the saved PID. */ - rsbs r0, r3, #0 /* Negate it, and test for zero. */ - /* Use 0x80000000 if it was 0. See raise.c for how this is used. */ - it eq - moveq r0, #0x80000000 - str r0, NEGOFF_OFF1 (r2, PID_OFFSET) /* Store the temp PID. */ - /* The DO_CALL macro saves r7 on the stack, to enable generation of ARM unwind info. Since the stack is initially shared between parent and child of vfork, that saved value could be corrupted. @@ -57,11 +47,6 @@ ENTRY (__vfork) mov r7, ip cfi_restore (r7) - /* Restore the old PID value in the parent. */ - cmp r0, #0 /* If we are the parent... */ - it ne - strne r3, NEGOFF_OFF1 (r2, PID_OFFSET) /* restore the saved PID. */ - cmn a1, #4096 it cc RETINSTR(cc, lr) diff --git a/sysdeps/unix/sysv/linux/createthread.c b/sysdeps/unix/sysv/linux/createthread.c index 6d32cec..ec86f50 100644 --- a/sysdeps/unix/sysv/linux/createthread.c +++ b/sysdeps/unix/sysv/linux/createthread.c @@ -128,10 +128,10 @@ create_thread (struct pthread *pd, const struct pthread_attr *attr, /* The operation failed. We have to kill the thread. We let the normal cancellation mechanism do the work. */ + pid_t pid = __getpid (); INTERNAL_SYSCALL_DECL (err2); - (void) INTERNAL_SYSCALL (tgkill, err2, 3, - THREAD_GETMEM (THREAD_SELF, pid), - pd->tid, SIGCANCEL); + (void) INTERNAL_SYSCALL_CALL (tgkill, err2, pid, pd->tid, + SIGCANCEL); return INTERNAL_SYSCALL_ERRNO (res, err); } diff --git a/sysdeps/unix/sysv/linux/getpid.c b/sysdeps/unix/sysv/linux/getpid.c deleted file mode 100644 index 1124549..0000000 --- a/sysdeps/unix/sysv/linux/getpid.c +++ /dev/null @@ -1,64 +0,0 @@ -/* Copyright (C) 2003-2016 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@redhat.com>, 2003. - - 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 <unistd.h> -#include <tls.h> -#include <sysdep.h> - - -#if IS_IN (libc) -static inline __attribute__((always_inline)) pid_t really_getpid (pid_t oldval); - -static inline __attribute__((always_inline)) pid_t -really_getpid (pid_t oldval) -{ - if (__glibc_likely (oldval == 0)) - { - pid_t selftid = THREAD_GETMEM (THREAD_SELF, tid); - if (__glibc_likely (selftid != 0)) - return selftid; - } - - INTERNAL_SYSCALL_DECL (err); - pid_t result = INTERNAL_SYSCALL (getpid, err, 0); - - /* We do not set the PID field in the TID here since we might be - called from a signal handler while the thread executes fork. */ - if (oldval == 0) - THREAD_SETMEM (THREAD_SELF, tid, result); - return result; -} -#endif - -pid_t -__getpid (void) -{ -#if !IS_IN (libc) - INTERNAL_SYSCALL_DECL (err); - pid_t result = INTERNAL_SYSCALL (getpid, err, 0); -#else - pid_t result = THREAD_GETMEM (THREAD_SELF, pid); - if (__glibc_unlikely (result <= 0)) - result = really_getpid (result); -#endif - return result; -} - -libc_hidden_def (__getpid) -weak_alias (__getpid, getpid) -libc_hidden_def (getpid) diff --git a/sysdeps/unix/sysv/linux/hppa/clone.S b/sysdeps/unix/sysv/linux/hppa/clone.S index 3d037f1..25fcd49 100644 --- a/sysdeps/unix/sysv/linux/hppa/clone.S +++ b/sysdeps/unix/sysv/linux/hppa/clone.S @@ -132,18 +132,6 @@ ENTRY(__clone) ldwm -64(%sp), %r4 .LthreadStart: -# define CLONE_VM_BIT 23 /* 0x00000100 */ - /* Load original clone flags. - If CLONE_VM was passed, don't modify PID/TID. - Otherwise store the result of getpid to PID/TID. */ - ldw -56(%sp), %r26 - bb,<,n %r26, CLONE_VM_BIT, 1f - ble 0x100(%sr2, %r0) - ldi __NR_getpid, %r20 - mfctl %cr27, %r26 - stw %ret0, PID_THREAD_OFFSET(%r26) - stw %ret0, TID_THREAD_OFFSET(%r26) -1: /* Load up the arguments. */ ldw -60(%sp), %arg0 ldw -64(%sp), %r22 diff --git a/sysdeps/unix/sysv/linux/hppa/pt-vfork.S b/sysdeps/unix/sysv/linux/hppa/pt-vfork.S index df53236..4684048 100644 --- a/sysdeps/unix/sysv/linux/hppa/pt-vfork.S +++ b/sysdeps/unix/sysv/linux/hppa/pt-vfork.S @@ -25,26 +25,6 @@ replaced by a call to `execve'. Return -1 for errors, 0 to the new process, and the process ID of the new process to the old process. */ -/* Load the thread register. - Load the saved PID value. - Negate the value. - Store the temporary PID. */ -#define SAVE_PID \ - mfctl %cr27, %r26 ASM_LINE_SEP \ - ldw PID_THREAD_OFFSET(%r26),%r1 ASM_LINE_SEP \ - sub %r0,%r1,%r1 ASM_LINE_SEP \ - stw %r1,PID_THREAD_OFFSET(%r26) ASM_LINE_SEP -/* If we are the parent... - Get the thread pointer. - Load the saved PID. - Negate the value (got back original) - Restore the PID. */ -#define RESTORE_PID \ - cmpb,=,n %r0,%ret0,.Lthread_start ASM_LINE_SEP \ - mfctl %cr27, %r26 ASM_LINE_SEP \ - ldw PID_THREAD_OFFSET(%r26),%r1 ASM_LINE_SEP \ - sub %r0,%r1,%r1 ASM_LINE_SEP \ - stw %r1,PID_THREAD_OFFSET(%r26) ASM_LINE_SEP \ .Lthread_start: ASM_LINE_SEP /* r26, r25, r24, r23 are free since vfork has no arguments */ @@ -58,16 +38,10 @@ ENTRY(__vfork) copy %r19, %r25 /* parent */ #endif - /* Save the process PID */ - SAVE_PID - /* Syscall saves and restores all register states */ ble 0x100(%sr2,%r0) ldi __NR_vfork,%r20 - /* Conditionally restore the PID */ - RESTORE_PID - /* Check for error */ ldi -4096,%r1 comclr,>>= %r1,%ret0,%r0 /* Note: unsigned compare. */ diff --git a/sysdeps/unix/sysv/linux/i386/clone.S b/sysdeps/unix/sysv/linux/i386/clone.S index 25f2a9c..feae504 100644 --- a/sysdeps/unix/sysv/linux/i386/clone.S +++ b/sysdeps/unix/sysv/linux/i386/clone.S @@ -107,9 +107,6 @@ L(thread_start): cfi_undefined (eip); /* Note: %esi is zero. */ movl %esi,%ebp /* terminate the stack frame */ - testl $CLONE_VM, %edi - je L(newpid) -L(haspid): call *%ebx #ifdef PIC call L(here) @@ -121,18 +118,6 @@ L(here): movl $SYS_ify(exit), %eax ENTER_KERNEL - .subsection 2 -L(newpid): - movl $SYS_ify(getpid), %eax - ENTER_KERNEL -L(nomoregetpid): - movl %eax, %gs:PID - movl %eax, %gs:TID - jmp L(haspid) - .previous - cfi_endproc; - - cfi_startproc PSEUDO_END (__clone) libc_hidden_def (__clone) diff --git a/sysdeps/unix/sysv/linux/i386/vfork.S b/sysdeps/unix/sysv/linux/i386/vfork.S index 7a1d337..a865de2 100644 --- a/sysdeps/unix/sysv/linux/i386/vfork.S +++ b/sysdeps/unix/sysv/linux/i386/vfork.S @@ -34,17 +34,6 @@ ENTRY (__vfork) cfi_adjust_cfa_offset (-4) cfi_register (%eip, %ecx) - /* Save the TCB-cached PID away in %edx, and then negate the TCB - field. But if it's zero, set it to 0x80000000 instead. See - raise.c for the logic that relies on this value. */ - movl %gs:PID, %edx - movl %edx, %eax - negl %eax - jne 1f - movl $0x80000000, %eax -1: movl %eax, %gs:PID - - /* Stuff the syscall number in EAX and enter into the kernel. */ movl $SYS_ify (vfork), %eax int $0x80 @@ -55,14 +44,6 @@ ENTRY (__vfork) pushl %ecx cfi_adjust_cfa_offset (4) - /* Restore the original value of the TCB cache of the PID, if we're - the parent. But in the child (syscall return value equals zero), - leave things as they are. */ - testl %eax, %eax - je 1f - movl %edx, %gs:PID -1: - cmpl $-4095, %eax /* Branch forward if it failed. */ jae SYSCALL_ERROR_LABEL diff --git a/sysdeps/unix/sysv/linux/ia64/clone2.S b/sysdeps/unix/sysv/linux/ia64/clone2.S index b4cfdfc..e637b6d 100644 --- a/sysdeps/unix/sysv/linux/ia64/clone2.S +++ b/sysdeps/unix/sysv/linux/ia64/clone2.S @@ -67,19 +67,7 @@ ENTRY(__clone2) (CHILD) mov loc0=gp (PARENT) ret ;; - tbit.nz p6,p0=in3,8 /* CLONE_VM */ -(p6) br.cond.dptk 1f - ;; - mov r15=SYS_ify (getpid) -(p7) break __BREAK_SYSCALL - ;; - add r9=PID,r13 - add r10=TID,r13 - ;; - st4 [r9]=r8 - st4 [r10]=r8 - ;; -1: ld8 out1=[in0],8 /* Retrieve code pointer. */ + ld8 out1=[in0],8 /* Retrieve code pointer. */ mov out0=in4 /* Pass proper argument to fn */ ;; ld8 gp=[in0] /* Load function gp. */ diff --git a/sysdeps/unix/sysv/linux/ia64/vfork.S b/sysdeps/unix/sysv/linux/ia64/vfork.S index 9154d7c..84bfdd5 100644 --- a/sysdeps/unix/sysv/linux/ia64/vfork.S +++ b/sysdeps/unix/sysv/linux/ia64/vfork.S @@ -33,32 +33,12 @@ ENTRY (__libc_vfork) .prologue // work around a GAS bug which triggers if .body // first .prologue is not at the beginning of proc. alloc r2=ar.pfs,0,0,2,0 - adds r14=PID,r13 - ;; - ld4 r16=[r14] - ;; - sub r15=0,r16 - cmp.eq p6,p0=0,r16 - ;; -(p6) movl r15=0x80000000 mov out0=CLONE_VM+CLONE_VFORK+SIGCHLD mov out1=0 /* Standard sp value. */ ;; - st4 [r14]=r15 DO_CALL (SYS_ify (clone)) cmp.eq p6,p0=0,r8 - adds r14=PID,r13 (p6) br.cond.dptk 1f - ;; - ld4 r15=[r14] - ;; - extr.u r16=r15,0,31 - ;; - cmp.eq p0,p6=0,r16 - ;; -(p6) sub r16=0,r15 - ;; - st4 [r14]=r16 1: cmp.eq p6,p0=-1,r10 (p6) br.cond.spnt.few __syscall_error diff --git a/sysdeps/unix/sysv/linux/m68k/clone.S b/sysdeps/unix/sysv/linux/m68k/clone.S index 3a82844..630a292 100644 --- a/sysdeps/unix/sysv/linux/m68k/clone.S +++ b/sysdeps/unix/sysv/linux/m68k/clone.S @@ -98,19 +98,6 @@ ENTRY (__clone) cfi_startproc cfi_undefined (pc) /* Mark end of stack */ subl %fp, %fp /* terminate the stack frame */ - /* Check and see if we need to reset the PID. */ - andl #CLONE_VM, %d1 - jne 1f - movel #SYS_ify (getpid), %d0 - trap #0 - movel %a0, -(%sp) - movel %d0, -(%sp) - bsrl __m68k_read_tp@PLTPC - movel (%sp)+, %d0 - movel %d0, PID_OFFSET(%a0) - movel %d0, TID_OFFSET(%a0) - movel (%sp)+, %a0 -1: jsr (%a0) movel %d0, %d1 movel #SYS_ify (exit), %d0 diff --git a/sysdeps/unix/sysv/linux/m68k/vfork.S b/sysdeps/unix/sysv/linux/m68k/vfork.S index 1625a7b..e274793 100644 --- a/sysdeps/unix/sysv/linux/m68k/vfork.S +++ b/sysdeps/unix/sysv/linux/m68k/vfork.S @@ -28,18 +28,6 @@ ENTRY (__vfork) - /* Save the TCB-cached PID away in %d1, and then negate the TCB - field. But if it's zero, set it to 0x80000000 instead. See - raise.c for the logic that relies on this value. */ - jbsr __m68k_read_tp@PLTPC - movel %a0, %a1 - movel PID_OFFSET(%a1), %d0 - movel %d0, %d1 - negl %d0 - jne 1f - movel #0x80000000, %d0 -1: movel %d0, PID_OFFSET(%a1) - /* Pop the return PC value into A0. */ movel %sp@+, %a0 cfi_adjust_cfa_offset (-4) @@ -49,14 +37,6 @@ ENTRY (__vfork) movel #SYS_ify (vfork), %d0 trap #0 - /* Restore the original value of the TCB cache of the PID, if we're - the parent. But in the child (syscall return value equals zero), - leave things as they are. */ - tstl %d0 - jeq 1f - movel %d1, PID_OFFSET(%a1) -1: - tstl %d0 jmi .Lerror /* Branch forward if it failed. */ diff --git a/sysdeps/unix/sysv/linux/mips/clone.S b/sysdeps/unix/sysv/linux/mips/clone.S index 39634c5..7ae65ef 100644 --- a/sysdeps/unix/sysv/linux/mips/clone.S +++ b/sysdeps/unix/sysv/linux/mips/clone.S @@ -130,11 +130,6 @@ L(thread_start): SAVE_GP (GPOFF) /* The stackframe has been created on entry of clone(). */ - /* Check and see if we need to reset the PID. */ - and a1,a0,CLONE_VM - beqz a1,L(restore_pid) -L(donepid): - /* Restore the arg for user's function. */ PTR_L t9,0(sp) /* Function pointer. */ PTR_L a0,PTRSIZE(sp) /* Argument pointer. */ @@ -151,14 +146,6 @@ L(donepid): jal _exit #endif -L(restore_pid): - li v0,__NR_getpid - syscall - READ_THREAD_POINTER(v1) - INT_S v0,PID_OFFSET(v1) - INT_S v0,TID_OFFSET(v1) - b L(donepid) - END(__thread_start) libc_hidden_def (__clone) diff --git a/sysdeps/unix/sysv/linux/mips/vfork.S b/sysdeps/unix/sysv/linux/mips/vfork.S index 1867c86..0b9244b 100644 --- a/sysdeps/unix/sysv/linux/mips/vfork.S +++ b/sysdeps/unix/sysv/linux/mips/vfork.S @@ -60,14 +60,6 @@ NESTED(__libc_vfork,FRAMESZ,sp) PTR_ADDU sp, FRAMESZ cfi_adjust_cfa_offset (-FRAMESZ) - /* Save the PID value. */ - READ_THREAD_POINTER(v1) /* Get the thread pointer. */ - lw a2, PID_OFFSET(v1) /* Load the saved PID. */ - subu a2, $0, a2 /* Negate it. */ - bnez a2, 1f /* If it was zero... */ - lui a2, 0x8000 /* use 0x80000000 instead. */ -1: sw a2, PID_OFFSET(v1) /* Store the temporary PID. */ - li a0, 0x4112 /* CLONE_VM | CLONE_VFORK | SIGCHLD */ move a1, sp @@ -75,17 +67,6 @@ NESTED(__libc_vfork,FRAMESZ,sp) li v0,__NR_clone syscall - /* Restore the old PID value in the parent. */ - beqz v0, 1f /* If we are the parent... */ - READ_THREAD_POINTER(v1) /* Get the thread pointer. */ - lw a2, PID_OFFSET(v1) /* Load the saved PID. */ - subu a2, $0, a2 /* Re-negate it. */ - lui a0, 0x8000 /* Load 0x80000000... */ - bne a2, a0, 2f /* ... compare against it... */ - li a2, 0 /* ... use 0 instead. */ -2: sw a2, PID_OFFSET(v1) /* Restore the PID. */ -1: - cfi_remember_state bnez a3,L(error) diff --git a/sysdeps/unix/sysv/linux/nios2/clone.S b/sysdeps/unix/sysv/linux/nios2/clone.S index 30b6e4a..c9fa00f 100644 --- a/sysdeps/unix/sysv/linux/nios2/clone.S +++ b/sysdeps/unix/sysv/linux/nios2/clone.S @@ -68,14 +68,6 @@ thread_start: cfi_startproc cfi_undefined (ra) - /* We expect the argument registers to be preserved across system - calls and across task cloning, so flags should be in r4 here. */ - andi r2, r4, CLONE_VM - bne r2, zero, 2f - DO_CALL (getpid, 0) - stw r2, PID_OFFSET(r23) - stw r2, TID_OFFSET(r23) -2: ldw r5, 4(sp) /* Function pointer. */ ldw r4, 0(sp) /* Argument pointer. */ addi sp, sp, 8 diff --git a/sysdeps/unix/sysv/linux/nios2/vfork.S b/sysdeps/unix/sysv/linux/nios2/vfork.S index c1bb9c7..8997269 100644 --- a/sysdeps/unix/sysv/linux/nios2/vfork.S +++ b/sysdeps/unix/sysv/linux/nios2/vfork.S @@ -21,20 +21,10 @@ ENTRY(__vfork) - ldw r6, PID_OFFSET(r23) - sub r7, zero, r6 - bne r7, zero, 2f - movhi r7, %hi(0x80000000) -2: - stw r7, PID_OFFSET(r23) - movi r4, 0x4111 /* (CLONE_VM | CLONE_VFORK | SIGCHLD) */ mov r5, zero DO_CALL (clone, 2) - beq r2, zero, 1f - stw r6, PID_OFFSET(r23) -1: bne r7, zero, SYSCALL_ERROR_LABEL ret diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/clone.S b/sysdeps/unix/sysv/linux/powerpc/powerpc32/clone.S index bebadbf..49fe01e 100644 --- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/clone.S +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/clone.S @@ -76,15 +76,6 @@ ENTRY (__clone) crandc cr1*4+eq,cr1*4+eq,cr0*4+so bne- cr1,L(parent) /* The '-' is to minimise the race. */ - /* If CLONE_VM is set do not update the pid/tid field. */ - andi. r0,r28,CLONE_VM - bne+ cr0,L(oldpid) - - DO_CALL(SYS_ify(getpid)) - stw r3,TID(r2) - stw r3,PID(r2) -L(oldpid): - /* Call procedure. */ mtctr r30 mr r3,r31 diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/vfork.S b/sysdeps/unix/sysv/linux/powerpc/powerpc32/vfork.S index edbc7de..0a72495 100644 --- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/vfork.S +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/vfork.S @@ -27,34 +27,8 @@ ENTRY (__vfork) - /* Load the TCB-cached PID value and negates it. If It it is zero - sets it to 0x800000. And then sets its value again on TCB field. - See raise.c for the logic that relies on this value. */ - - lwz r0,PID(r2) - cmpwi cr0,r0,0 - neg r0,r0 - bne- cr0,1f - lis r0,0x8000 -1: stw r0,PID(r2) - DO_CALL (SYS_ify (vfork)) - cmpwi cr1,r3,0 - beqlr- 1 - - /* Restore the original value of the TCB cache of the PID, if we're - the parent. But in the child (syscall return value equals zero), - leave things as they are. */ - lwz r0,PID(r2) - /* Cannot use clrlwi. here, because cr0 needs to be preserved - until PSEUDO_RET. */ - clrlwi r4,r0,1 - cmpwi cr1,r4,0 - beq- cr1,1f - neg r4,r0 -1: stw r4,PID(r2) - PSEUDO_RET PSEUDO_END (__vfork) diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/clone.S b/sysdeps/unix/sysv/linux/powerpc/powerpc64/clone.S index df824f5..2a66fef 100644 --- a/sysdeps/unix/sysv/linux/powerpc/powerpc64/clone.S +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/clone.S @@ -78,15 +78,6 @@ ENTRY (__clone) crandc cr1*4+eq,cr1*4+eq,cr0*4+so bne- cr1,L(parent) /* The '-' is to minimise the race. */ - /* If CLONE_VM is set do not update the pid/tid field. */ - rldicl. r0,r29,56,63 /* flags & CLONE_VM. */ - bne+ cr0,L(oldpid) - - DO_CALL(SYS_ify(getpid)) - stw r3,TID(r13) - stw r3,PID(r13) -L(oldpid): - std r2,FRAME_TOC_SAVE(r1) /* Call procedure. */ PPC64_LOAD_FUNCPTR r30 diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/vfork.S b/sysdeps/unix/sysv/linux/powerpc/powerpc64/vfork.S index 3083ab7..6b4cf43 100644 --- a/sysdeps/unix/sysv/linux/powerpc/powerpc64/vfork.S +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/vfork.S @@ -28,31 +28,8 @@ ENTRY (__vfork) CALL_MCOUNT 0 - /* Load the TCB-cached PID value and negates it. If It it is zero - sets it to 0x800000. And then sets its value again on TCB field. - See raise.c for the logic that relies on this value. */ - lwz r0,PID(r13) - cmpwi cr0,r0,0 - neg r0,r0 - bne- cr0,1f - lis r0,0x8000 -1: stw r0,PID(r13) - DO_CALL (SYS_ify (vfork)) - cmpwi cr1,r3,0 - beqlr- 1 - - /* Restore the original value of the TCB cache of the PID, if we're - the parent. But in the child (syscall return value equals zero), - leave things as they are. */ - lwz r0,PID(r13) - clrlwi r4,r0,1 - cmpwi cr1,r4,0 - beq- cr1,1f - neg r4,r0 -1: stw r4,PID(r13) - PSEUDO_RET PSEUDO_END (__vfork) diff --git a/sysdeps/unix/sysv/linux/pthread-pids.h b/sysdeps/unix/sysv/linux/pthread-pids.h index d42bba0..618a5b1 100644 --- a/sysdeps/unix/sysv/linux/pthread-pids.h +++ b/sysdeps/unix/sysv/linux/pthread-pids.h @@ -26,5 +26,5 @@ static inline void __pthread_initialize_pids (struct pthread *pd) { INTERNAL_SYSCALL_DECL (err); - pd->pid = pd->tid = INTERNAL_SYSCALL (set_tid_address, err, 1, &pd->tid); + pd->tid = INTERNAL_SYSCALL_CALL (set_tid_address, err, &pd->tid); } diff --git a/sysdeps/unix/sysv/linux/pthread_kill.c b/sysdeps/unix/sysv/linux/pthread_kill.c index bcb3009..cc10997 100644 --- a/sysdeps/unix/sysv/linux/pthread_kill.c +++ b/sysdeps/unix/sysv/linux/pthread_kill.c @@ -21,6 +21,7 @@ #include <pthreadP.h> #include <tls.h> #include <sysdep.h> +#include <unistd.h> int @@ -49,15 +50,9 @@ __pthread_kill (pthread_t threadid, int signo) /* We have a special syscall to do the work. */ INTERNAL_SYSCALL_DECL (err); - /* One comment: The PID field in the TCB can temporarily be changed - (in fork). But this must not affect this code here. Since this - function would have to be called while the thread is executing - fork, it would have to happen in a signal handler. But this is - no allowed, pthread_kill is not guaranteed to be async-safe. */ - int val; - val = INTERNAL_SYSCALL (tgkill, err, 3, THREAD_GETMEM (THREAD_SELF, pid), - tid, signo); + pid_t pid = __getpid (); + int val = INTERNAL_SYSCALL_CALL (tgkill, err, pid, tid, signo); return (INTERNAL_SYSCALL_ERROR_P (val, err) ? INTERNAL_SYSCALL_ERRNO (val, err) : 0); } diff --git a/sysdeps/unix/sysv/linux/pthread_sigqueue.c b/sysdeps/unix/sysv/linux/pthread_sigqueue.c index 7694d54..e393e0b 100644 --- a/sysdeps/unix/sysv/linux/pthread_sigqueue.c +++ b/sysdeps/unix/sysv/linux/pthread_sigqueue.c @@ -49,27 +49,22 @@ pthread_sigqueue (pthread_t threadid, int signo, const union sigval value) if (signo == SIGCANCEL || signo == SIGTIMER || signo == SIGSETXID) return EINVAL; + pid_t pid = getpid (); + /* Set up the siginfo_t structure. */ siginfo_t info; memset (&info, '\0', sizeof (siginfo_t)); info.si_signo = signo; info.si_code = SI_QUEUE; - info.si_pid = THREAD_GETMEM (THREAD_SELF, pid); + info.si_pid = pid; info.si_uid = getuid (); info.si_value = value; /* We have a special syscall to do the work. */ INTERNAL_SYSCALL_DECL (err); - /* One comment: The PID field in the TCB can temporarily be changed - (in fork). But this must not affect this code here. Since this - function would have to be called while the thread is executing - fork, it would have to happen in a signal handler. But this is - no allowed, pthread_sigqueue is not guaranteed to be async-safe. */ - int val = INTERNAL_SYSCALL (rt_tgsigqueueinfo, err, 4, - THREAD_GETMEM (THREAD_SELF, pid), - tid, signo, &info); - + int val = INTERNAL_SYSCALL_CALL (rt_tgsigqueueinfo, err, pid, tid, signo, + &info); return (INTERNAL_SYSCALL_ERROR_P (val, err) ? INTERNAL_SYSCALL_ERRNO (val, err) : 0); #else diff --git a/sysdeps/unix/sysv/linux/raise.c b/sysdeps/unix/sysv/linux/raise.c index 470033e..49bb7cb 100644 --- a/sysdeps/unix/sysv/linux/raise.c +++ b/sysdeps/unix/sysv/linux/raise.c @@ -26,13 +26,6 @@ int raise (int sig) { - /* raise is an async-safe function so it could be called while the - fork/vfork function temporarily invalidated the PID field. To avoid - relying on cached value we block all user-defined signal handler - (which might call fork/vfork) and issue the getpid and gettid - syscalls directly. */ - - /* rt_sigprocmask may fail if: 1. sigsetsize != sizeof (sigset_t) (EINVAL) diff --git a/sysdeps/unix/sysv/linux/s390/s390-32/clone.S b/sysdeps/unix/sysv/linux/s390/s390-32/clone.S index 2f8fa0b..b1de148 100644 --- a/sysdeps/unix/sysv/linux/s390/s390-32/clone.S +++ b/sysdeps/unix/sysv/linux/s390/s390-32/clone.S @@ -54,13 +54,6 @@ error: PSEUDO_END (__clone) thread_start: - tml %r3,256 /* CLONE_VM == 0x00000100 */ - jne 1f - svc SYS_ify(getpid) - ear %r3,%a0 - st %r2,PID(%r3) - st %r2,TID(%r3) -1: /* fn is in gpr 1, arg in gpr 0 */ lr %r2,%r0 /* set first parameter to void *arg */ ahi %r15,-96 /* make room on the stack for the save area */ diff --git a/sysdeps/unix/sysv/linux/s390/s390-32/vfork.S b/sysdeps/unix/sysv/linux/s390/s390-32/vfork.S index b7588eb..cc60e13 100644 --- a/sysdeps/unix/sysv/linux/s390/s390-32/vfork.S +++ b/sysdeps/unix/sysv/linux/s390/s390-32/vfork.S @@ -28,21 +28,9 @@ and the process ID of the new process to the old process. */ ENTRY (__libc_vfork) - ear %r4,%a0 - lhi %r1,1 - icm %r3,15,PID(%r4) - sll %r1,31 - je 1f - lcr %r1,%r3 -1: st %r1,PID(%r4) - /* Do vfork system call. */ svc SYS_ify (vfork) - ltr %r2,%r2 - je 1f - st %r3,PID(%r4) -1: /* Check for error. */ lhi %r4,-4095 clr %r2,%r4 diff --git a/sysdeps/unix/sysv/linux/s390/s390-64/clone.S b/sysdeps/unix/sysv/linux/s390/s390-64/clone.S index fb81692..29606ac 100644 --- a/sysdeps/unix/sysv/linux/s390/s390-64/clone.S +++ b/sysdeps/unix/sysv/linux/s390/s390-64/clone.S @@ -55,15 +55,6 @@ error: PSEUDO_END (__clone) thread_start: - tmll %r3,256 /* CLONE_VM == 0x00000100 */ - jne 1f - svc SYS_ify(getpid) - ear %r3,%a0 - sllg %r3,%r3,32 - ear %r3,%a1 - st %r2,PID(%r3) - st %r2,TID(%r3) -1: /* fn is in gpr 1, arg in gpr 0 */ lgr %r2,%r0 /* set first parameter to void *arg */ aghi %r15,-160 /* make room on the stack for the save area */ diff --git a/sysdeps/unix/sysv/linux/s390/s390-64/vfork.S b/sysdeps/unix/sysv/linux/s390/s390-64/vfork.S index 0bd2161..b9a813f 100644 --- a/sysdeps/unix/sysv/linux/s390/s390-64/vfork.S +++ b/sysdeps/unix/sysv/linux/s390/s390-64/vfork.S @@ -28,22 +28,9 @@ and the process ID of the new process to the old process. */ ENTRY (__libc_vfork) - ear %r4,%a0 - sllg %r4,%r4,32 - ear %r4,%a1 - icm %r3,15,PID(%r4) - llilh %r1,32768 - je 1f - lcr %r1,%r3 -1: st %r1,PID(%r4) - /* Do vfork system call. */ svc SYS_ify (vfork) - ltgr %r2,%r2 - je 1f - st %r3,PID(%r4) -1: /* Check for error. */ lghi %r4,-4095 clgr %r2,%r4 diff --git a/sysdeps/unix/sysv/linux/sh/clone.S b/sysdeps/unix/sysv/linux/sh/clone.S index 4cd7df1..ce7cddc 100644 --- a/sysdeps/unix/sysv/linux/sh/clone.S +++ b/sysdeps/unix/sysv/linux/sh/clone.S @@ -66,23 +66,7 @@ ENTRY(__clone) 2: /* terminate the stack frame */ mov #0, r14 - mov r4, r0 - shlr8 r0 - tst #1, r0 // CLONE_VM = (1 << 8) - bf/s 4f - mov r4, r0 - /* new pid */ - mov #+SYS_ify(getpid), r3 - trapa #0x15 -3: - stc gbr, r1 - mov.w .Lpidoff, r2 - add r1, r2 - mov.l r0, @r2 - mov.w .Ltidoff, r2 - add r1, r2 - mov.l r0, @r2 -4: + /* thread starts */ mov.l @r15, r1 jsr @r1 @@ -113,10 +97,6 @@ ENTRY(__clone) .long _GLOBAL_OFFSET_TABLE_ .L3: .long PLTJMP(C_SYMBOL_NAME(_exit)) -.Lpidoff: - .word PID - TLS_PRE_TCB_SIZE -.Ltidoff: - .word TID - TLS_PRE_TCB_SIZE PSEUDO_END (__clone) libc_hidden_def (__clone) diff --git a/sysdeps/unix/sysv/linux/sh/vfork.S b/sysdeps/unix/sysv/linux/sh/vfork.S index 6895bc5..df559cb 100644 --- a/sysdeps/unix/sysv/linux/sh/vfork.S +++ b/sysdeps/unix/sysv/linux/sh/vfork.S @@ -26,30 +26,11 @@ and the process ID of the new process to the old process. */ ENTRY (__libc_vfork) - /* Save the PID value. */ - stc gbr, r2 - mov.w .L2, r0 - mov.l @(r0,r2), r4 - neg r4, r1 - tst r1, r1 - bf 1f - mov #1, r1 - rotr r1 -1: - mov.l r1, @(r0,r2) mov.w .L1, r3 trapa #0x10 mov r0, r1 - /* Restore the old PID value in the parent. */ - tst r0, r0 - bt.s 2f - stc gbr, r2 - mov.w .L2, r0 - mov.l r4, @(r0,r2) - mov r1, r0 -2: mov #-12, r2 shad r2, r1 not r1, r1 // r1=0 means r0 = -1 to -4095 @@ -61,8 +42,6 @@ ENTRY (__libc_vfork) nop .L1: .word __NR_vfork -.L2: - .word PID - TLS_PRE_TCB_SIZE .align 2 PSEUDO_END (__libc_vfork) diff --git a/sysdeps/unix/sysv/linux/sparc/sparc32/clone.S b/sysdeps/unix/sysv/linux/sparc/sparc32/clone.S index d6c92f6..0456a0d 100644 --- a/sysdeps/unix/sysv/linux/sparc/sparc32/clone.S +++ b/sysdeps/unix/sysv/linux/sparc/sparc32/clone.S @@ -79,13 +79,6 @@ END(__clone) .type __thread_start,@function __thread_start: - andcc %g4, CLONE_VM, %g0 - bne 1f - set __NR_getpid,%g1 - ta 0x10 - st %o0,[%g7 + PID] - st %o0,[%g7 + TID] -1: mov %g0, %fp /* terminate backtrace */ call %g2 mov %g3,%o0 diff --git a/sysdeps/unix/sysv/linux/sparc/sparc32/vfork.S b/sysdeps/unix/sysv/linux/sparc/sparc32/vfork.S index 0d0a3b5..6d98503 100644 --- a/sysdeps/unix/sysv/linux/sparc/sparc32/vfork.S +++ b/sysdeps/unix/sysv/linux/sparc/sparc32/vfork.S @@ -22,24 +22,14 @@ .text .globl __syscall_error ENTRY(__libc_vfork) - ld [%g7 + PID], %o5 - cmp %o5, 0 - bne 1f - sub %g0, %o5, %o4 - sethi %hi(0x80000000), %o4 -1: st %o4, [%g7 + PID] - LOADSYSCALL(vfork) ta 0x10 bcc 2f mov %o7, %g1 - st %o5, [%g7 + PID] call __syscall_error mov %g1, %o7 2: sub %o1, 1, %o1 andcc %o0, %o1, %o0 - bne,a 1f - st %o5, [%g7 + PID] 1: retl nop END(__libc_vfork) diff --git a/sysdeps/unix/sysv/linux/sparc/sparc64/clone.S b/sysdeps/unix/sysv/linux/sparc/sparc64/clone.S index b0f6266..6ffead8 100644 --- a/sysdeps/unix/sysv/linux/sparc/sparc64/clone.S +++ b/sysdeps/unix/sysv/linux/sparc/sparc64/clone.S @@ -76,13 +76,6 @@ END(__clone) .type __thread_start,@function __thread_start: - andcc %g4, CLONE_VM, %g0 - bne,pt %icc, 1f - set __NR_getpid,%g1 - ta 0x6d - st %o0,[%g7 + PID] - st %o0,[%g7 + TID] -1: mov %g0, %fp /* terminate backtrace */ call %g2 mov %g3,%o0 diff --git a/sysdeps/unix/sysv/linux/sparc/sparc64/vfork.S b/sysdeps/unix/sysv/linux/sparc/sparc64/vfork.S index 0818eba..298dd19 100644 --- a/sysdeps/unix/sysv/linux/sparc/sparc64/vfork.S +++ b/sysdeps/unix/sysv/linux/sparc/sparc64/vfork.S @@ -22,24 +22,14 @@ .text .globl __syscall_error ENTRY(__libc_vfork) - ld [%g7 + PID], %o5 - sethi %hi(0x80000000), %o3 - cmp %o5, 0 - sub %g0, %o5, %o4 - move %icc, %o3, %o4 - st %o4, [%g7 + PID] - LOADSYSCALL(vfork) ta 0x6d bcc,pt %xcc, 2f mov %o7, %g1 - st %o5, [%g7 + PID] call __syscall_error mov %g1, %o7 2: sub %o1, 1, %o1 andcc %o0, %o1, %o0 - bne,a,pt %icc, 1f - st %o5, [%g7 + PID] 1: retl nop END(__libc_vfork) diff --git a/sysdeps/unix/sysv/linux/syscalls.list b/sysdeps/unix/sysv/linux/syscalls.list index 68af897..98b3bb9 100644 --- a/sysdeps/unix/sysv/linux/syscalls.list +++ b/sysdeps/unix/sysv/linux/syscalls.list @@ -18,6 +18,7 @@ execve - execve i:spp __execve execve fdatasync - fdatasync Ci:i fdatasync flock - flock i:ii __flock flock get_kernel_syms EXTRA get_kernel_syms i:p __compat_get_kernel_syms get_kernel_syms@GLIBC_2.0:GLIBC_2.23 +getpid - getpid Ei: __getpid getpid getegid - getegid Ei: __getegid getegid geteuid - geteuid Ei: __geteuid geteuid getpgid - getpgid i:i __getpgid getpgid diff --git a/sysdeps/unix/sysv/linux/tile/clone.S b/sysdeps/unix/sysv/linux/tile/clone.S index d1d3646..3f9e3d5 100644 --- a/sysdeps/unix/sysv/linux/tile/clone.S +++ b/sysdeps/unix/sysv/linux/tile/clone.S @@ -163,22 +163,6 @@ ENTRY (__clone) .Lthread_start: cfi_def_cfa_offset (FRAME_SIZE) cfi_undefined (lr) - /* Check and see if we need to reset the PID, which we do if - CLONE_VM isn't set, i.e. it's a fork-like clone with a new - address space. In that case we update the cached values - from the true system pid (retrieved via __NR_getpid syscall). */ - moveli r0, CLONE_VM - and r0, r30, r0 - BNEZ r0, .Lno_reset_pid /* CLONE_VM is set */ - moveli TREG_SYSCALL_NR_NAME, __NR_getpid - swint1 - ADDLI_PTR r2, tp, PID_OFFSET - { - ST4 r2, r0 - ADDLI_PTR r2, tp, TID_OFFSET - } - ST4 r2, r0 -.Lno_reset_pid: { /* Invoke user function with specified argument. */ move r0, r31 diff --git a/sysdeps/unix/sysv/linux/tile/vfork.S b/sysdeps/unix/sysv/linux/tile/vfork.S index d8c5ce3..2272777 100644 --- a/sysdeps/unix/sysv/linux/tile/vfork.S +++ b/sysdeps/unix/sysv/linux/tile/vfork.S @@ -30,18 +30,6 @@ .text ENTRY (__vfork) { - addli r11, tp, PID_OFFSET /* Point at PID. */ - movei r13, 1 - } - { - LD4U r12, r11 /* Load the saved PID. */ - shli r13, r13, 31 /* Build 0x80000000. */ - } - sub r12, zero, r12 /* Negate it. */ - CMOVEQZ r12, r12, r13 /* Replace zero pids. */ - ST4 r11, r12 /* Store the temporary PID. */ - - { moveli r0, CLONE_VFORK | CLONE_VM | SIGCHLD move r1, zero } @@ -52,22 +40,6 @@ ENTRY (__vfork) moveli TREG_SYSCALL_NR_NAME, __NR_clone swint1 - BEQZ r0, 1f /* If we are the parent... */ - { - addli r11, tp, PID_OFFSET /* Point at PID. */ - movei r13, 1 - } - { - LD4U r12, r11 /* Load the saved PID. */ - shli r13, r13, 31 /* Build 0x80000000. */ - } - { - CMPEQ r13, r12, r12 /* Test for that value. */ - sub r12, zero, r12 /* Re-negate it. */ - } - CMOVNEZ r12, r13, zero /* Replace zero pids. */ - ST4 r11, r12 /* Restore the PID. */ -1: BNEZ r1, 0f jrp lr PSEUDO_END (__vfork) diff --git a/sysdeps/unix/sysv/linux/tst-clone2.c b/sysdeps/unix/sysv/linux/tst-clone2.c index 68a7e6d..0da9e54 100644 --- a/sysdeps/unix/sysv/linux/tst-clone2.c +++ b/sysdeps/unix/sysv/linux/tst-clone2.c @@ -28,8 +28,14 @@ #include <stdlib.h> #include <sys/types.h> #include <sys/wait.h> +#include <sys/syscall.h> -#include <tls.h> /* for THREAD_* macros. */ +#include <stackinfo.h> /* For _STACK_GROWS_{UP,DOWN}. */ + +static int do_test (void); + +#define TEST_FUNCTION do_test () +#include <test-skeleton.c> static int sig; static int pipefd[2]; @@ -39,39 +45,35 @@ f (void *a) { close (pipefd[0]); - pid_t pid = THREAD_GETMEM (THREAD_SELF, pid); - pid_t tid = THREAD_GETMEM (THREAD_SELF, tid); + pid_t ppid = getppid (); + pid_t pid = getpid (); + pid_t tid = syscall (__NR_gettid); - while (write (pipefd[1], &pid, sizeof pid) < 0) - continue; - while (write (pipefd[1], &tid, sizeof tid) < 0) - continue; + if (write (pipefd[1], &ppid, sizeof ppid) != sizeof (ppid)) + FAIL_EXIT1 ("write ppid failed\n"); + if (write (pipefd[1], &pid, sizeof pid) != sizeof (pid)) + FAIL_EXIT1 ("write pid failed\n"); + if (write (pipefd[1], &tid, sizeof tid) != sizeof (tid)) + FAIL_EXIT1 ("write tid failed\n"); return 0; } static int -clone_test (int clone_flags) +do_test (void) { sig = SIGRTMIN; sigset_t ss; sigemptyset (&ss); sigaddset (&ss, sig); if (sigprocmask (SIG_BLOCK, &ss, NULL) != 0) - { - printf ("sigprocmask failed: %m\n"); - return 1; - } + FAIL_EXIT1 ("sigprocmask failed: %m"); if (pipe2 (pipefd, O_CLOEXEC)) - { - printf ("sigprocmask failed: %m\n"); - return 1; - } - - pid_t ppid = getpid (); + FAIL_EXIT1 ("pipe failed: %m"); + int clone_flags = 0; #ifdef __ia64__ extern int __clone2 (int (*__fn) (void *__arg), void *__child_stack_base, size_t __child_stack_size, int __flags, @@ -88,61 +90,47 @@ clone_test (int clone_flags) #error "Define either _STACK_GROWS_DOWN or _STACK_GROWS_UP" #endif #endif + close (pipefd[1]); if (p == -1) + FAIL_EXIT1("clone failed: %m"); + + pid_t ppid, pid, tid; + if (read (pipefd[0], &ppid, sizeof pid) != sizeof pid) { - printf ("clone failed: %m\n"); - return 1; + kill (p, SIGKILL); + FAIL_EXIT1 ("read ppid failed: %m"); } - - pid_t pid, tid; if (read (pipefd[0], &pid, sizeof pid) != sizeof pid) { - printf ("read pid failed: %m\n"); kill (p, SIGKILL); - return 1; + FAIL_EXIT1 ("read pid failed: %m"); } if (read (pipefd[0], &tid, sizeof tid) != sizeof tid) { - printf ("read pid failed: %m\n"); kill (p, SIGKILL); - return 1; + FAIL_EXIT1 ("read tid failed: %m"); } close (pipefd[0]); int ret = 0; - /* For CLONE_VM glibc clone implementation does not change the pthread - pid/tid field. */ - if ((clone_flags & CLONE_VM) == CLONE_VM) - { - if ((ppid != pid) || (ppid != tid)) - { - printf ("parent pid (%i) != received pid/tid (%i/%i)\n", - (int)ppid, (int)pid, (int)tid); - ret = 1; - } - } - /* For any other flag clone updates the new pthread pid and tid with - the clone return value. */ - else - { - if ((p != pid) || (p != tid)) - { - printf ("child pid (%i) != received pid/tid (%i/%i)\n", - (int)p, (int)pid, (int)tid); - ret = 1; - } - } + pid_t own_pid = getpid (); + pid_t own_tid = syscall (__NR_gettid); + + /* Some sanity checks for clone syscall: returned ppid should be current + pid and both returned tid/pid should be different from current one. */ + if ((ppid != own_pid) || (pid == own_pid) || (tid == own_tid)) + FAIL_RET ("ppid=%i pid=%i tid=%i | own_pid=%i own_tid=%i", + (int)ppid, (int)pid, (int)tid, (int)own_pid, (int)own_tid); int e; if (waitpid (p, &e, __WCLONE) != p) { - puts ("waitpid failed"); kill (p, SIGKILL); - return 1; + FAIL_EXIT1 ("waitpid failed"); } if (!WIFEXITED (e)) { @@ -150,29 +138,10 @@ clone_test (int clone_flags) printf ("died from signal %s\n", strsignal (WTERMSIG (e))); else puts ("did not terminate correctly"); - return 1; + exit (EXIT_FAILURE); } if (WEXITSTATUS (e) != 0) - { - printf ("exit code %d\n", WEXITSTATUS (e)); - return 1; - } + FAIL_EXIT1 ("exit code %d", WEXITSTATUS (e)); return ret; } - -int -do_test (void) -{ - /* First, check that the clone implementation, without any flag, updates - the struct pthread to contain the new PID and TID. */ - int ret = clone_test (0); - /* Second, check that with CLONE_VM the struct pthread PID and TID fields - remain unmodified after the clone. Any modifications would cause problem - for the parent as described in bug 19957. */ - ret += clone_test (CLONE_VM); - return ret; -} - -#define TEST_FUNCTION do_test () -#include "../test-skeleton.c" diff --git a/sysdeps/unix/sysv/linux/x86_64/clone.S b/sysdeps/unix/sysv/linux/x86_64/clone.S index 66f4b11..5629aed 100644 --- a/sysdeps/unix/sysv/linux/x86_64/clone.S +++ b/sysdeps/unix/sysv/linux/x86_64/clone.S @@ -91,14 +91,6 @@ L(thread_start): the outermost frame obviously. */ xorl %ebp, %ebp - andq $CLONE_VM, %rdi - jne 1f - movl $SYS_ify(getpid), %eax - syscall - movl %eax, %fs:PID - movl %eax, %fs:TID -1: - /* Set up arguments for the function call. */ popq %rax /* Function to call. */ popq %rdi /* Argument. */ diff --git a/sysdeps/unix/sysv/linux/x86_64/vfork.S b/sysdeps/unix/sysv/linux/x86_64/vfork.S index 8332ade..cdd2dea 100644 --- a/sysdeps/unix/sysv/linux/x86_64/vfork.S +++ b/sysdeps/unix/sysv/linux/x86_64/vfork.S @@ -34,16 +34,6 @@ ENTRY (__vfork) cfi_adjust_cfa_offset(-8) cfi_register(%rip, %rdi) - /* Save the TCB-cached PID away in %esi, and then negate the TCB - field. But if it's zero, set it to 0x80000000 instead. See - raise.c for the logic that relies on this value. */ - movl %fs:PID, %esi - movl $0x80000000, %ecx - movl %esi, %edx - negl %edx - cmove %ecx, %edx - movl %edx, %fs:PID - /* Stuff the syscall number in RAX and enter into the kernel. */ movl $SYS_ify (vfork), %eax syscall @@ -52,14 +42,6 @@ ENTRY (__vfork) pushq %rdi cfi_adjust_cfa_offset(8) - /* Restore the original value of the TCB cache of the PID, if we're - the parent. But in the child (syscall return value equals zero), - leave things as they are. */ - testq %rax, %rax - je 1f - movl %esi, %fs:PID -1: - cmpl $-4095, %eax jae SYSCALL_ERROR_LABEL /* Branch forward if it failed. */ diff --git a/sysdeps/x86_64/nptl/tcb-offsets.sym b/sysdeps/x86_64/nptl/tcb-offsets.sym index aeb7526..8a25c48 100644 --- a/sysdeps/x86_64/nptl/tcb-offsets.sym +++ b/sysdeps/x86_64/nptl/tcb-offsets.sym @@ -4,7 +4,6 @@ RESULT offsetof (struct pthread, result) TID offsetof (struct pthread, tid) -PID offsetof (struct pthread, pid) CANCELHANDLING offsetof (struct pthread, cancelhandling) CLEANUP_JMP_BUF offsetof (struct pthread, cleanup_jmp_buf) CLEANUP offsetof (struct pthread, cleanup) |