diff options
Diffstat (limited to 'nptl/sysdeps/unix/sysv/linux/pt-raise.c')
| -rw-r--r-- | nptl/sysdeps/unix/sysv/linux/pt-raise.c | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/pt-raise.c b/nptl/sysdeps/unix/sysv/linux/pt-raise.c index 2efd7616bf..9161e29e28 100644 --- a/nptl/sysdeps/unix/sysv/linux/pt-raise.c +++ b/nptl/sysdeps/unix/sysv/linux/pt-raise.c @@ -28,13 +28,22 @@ int raise (sig) int sig; { +#if __ASSUME_TGKILL || defined __NR_tgkill + /* raise is an async-safe function. It could be called while the + fork function temporarily invalidated the PID field. Adjust for + that. */ + pid_t pid = THREAD_GETMEM (THREAD_SELF, pid); + if (__builtin_expect (pid < 0, 0)) + pid = -pid; +#endif + #if __ASSUME_TGKILL - return INLINE_SYSCALL (tgkill, 3, THREAD_GETMEM (THREAD_SELF, pid), - THREAD_GETMEM (THREAD_SELF, tid), sig); + return INLINE_SYSCALL (tgkill, 3, pid, THREAD_GETMEM (THREAD_SELF, tid), + sig); #else # ifdef __NR_tgkill - int res = INLINE_SYSCALL (tgkill, 3, THREAD_GETMEM (THREAD_SELF, pid), - THREAD_GETMEM (THREAD_SELF, tid), sig); + int res = INLINE_SYSCALL (tgkill, 3, pid, THREAD_GETMEM (THREAD_SELF, tid), + sig); if (res != -1 || errno != ENOSYS) return res; # endif |