diff options
Diffstat (limited to 'nptl/allocatestack.c')
| -rw-r--r-- | nptl/allocatestack.c | 81 |
1 files changed, 80 insertions, 1 deletions
diff --git a/nptl/allocatestack.c b/nptl/allocatestack.c index cbdd781eeb..242da0a5a1 100644 --- a/nptl/allocatestack.c +++ b/nptl/allocatestack.c @@ -19,6 +19,7 @@ #include <assert.h> #include <errno.h> +#include <signal.h> #include <stdint.h> #include <string.h> #include <unistd.h> @@ -26,7 +27,7 @@ #include <sys/param.h> #include <dl-sysdep.h> #include <tls.h> - +#include <lowlevellock.h> #ifndef NEED_SEPARATE_REGISTER_STACK @@ -815,6 +816,84 @@ __find_thread_by_id (pid_t tid) } #endif +void +attribute_hidden +__nptl_setxid (struct xid_command *cmdp) +{ + lll_lock (stack_cache_lock); + + __xidcmd = cmdp; + cmdp->cntr = 0; + + INTERNAL_SYSCALL_DECL (err); + + struct pthread *self = THREAD_SELF; + + /* Iterate over the list with system-allocated threads first. */ + list_t *runp; + list_for_each (runp, &stack_used) + { + struct pthread *t = list_entry (runp, struct pthread, list); + if (t != self) + { + int val; +#if __ASSUME_TGKILL + val = INTERNAL_SYSCALL (tgkill, err, 3, + THREAD_GETMEM (THREAD_SELF, pid), + t->tid, SIGSETXID); +#else +# ifdef __NR_tgkill + val = INTERNAL_SYSCALL (tgkill, err, 3, + THREAD_GETMEM (THREAD_SELF, pid), + t->tid, SIGSETXID); + if (INTERNAL_SYSCALL_ERROR_P (val, err) + && INTERNAL_SYSCALL_ERRNO (val, err) == ENOSYS) +# endif + val = INTERNAL_SYSCALL (tkill, err, 2, t->tid, SIGSETXID); +#endif + + if (!INTERNAL_SYSCALL_ERROR_P (val, err)) + atomic_increment (&cmdp->cntr); + } + } + + /* Now the list with threads using user-allocated stacks. */ + list_for_each (runp, &__stack_user) + { + struct pthread *t = list_entry (runp, struct pthread, list); + if (t != self) + { + int val; +#if __ASSUME_TGKILL + val = INTERNAL_SYSCALL (tgkill, err, 3, + THREAD_GETMEM (THREAD_SELF, pid), + t->tid, SIGSETXID); +#else +# ifdef __NR_tgkill + val = INTERNAL_SYSCALL (tgkill, err, 3, + THREAD_GETMEM (THREAD_SELF, pid), + t->tid, SIGSETXID); + if (INTERNAL_SYSCALL_ERROR_P (val, err) + && INTERNAL_SYSCALL_ERRNO (val, err) == ENOSYS) +# endif + val = INTERNAL_SYSCALL (tkill, err, 2, t->tid, SIGSETXID); +#endif + + if (!INTERNAL_SYSCALL_ERROR_P (val, err)) + atomic_increment (&cmdp->cntr); + } + } + + int cur = cmdp->cntr; + while (cur != 0) + { + lll_futex_wait (&cmdp->cntr, cur); + cur = cmdp->cntr; + } + + lll_unlock (stack_cache_lock); +} + static inline void __attribute__((always_inline)) init_one_static_tls (struct pthread *curp, struct link_map *map) { |