Author: kib Date: Wed Feb 9 09:20:27 2011 New Revision: 218476 URL: http://svn.freebsd.org/changeset/base/218476
Log: Use sigsetjmp/siglongjmp with disabled signal mask access for lock upgrade in rtld. There is no need to care about the mask, which causes a lot of unneeded sigprocmask(2) calls during each symbol lookup. Modified: head/libexec/rtld-elf/rtld.c head/libexec/rtld-elf/rtld.h head/libexec/rtld-elf/rtld_lock.c Modified: head/libexec/rtld-elf/rtld.c ============================================================================== --- head/libexec/rtld-elf/rtld.c Wed Feb 9 08:01:45 2011 (r218475) +++ head/libexec/rtld-elf/rtld.c Wed Feb 9 09:20:27 2011 (r218476) @@ -560,7 +560,7 @@ _rtld_bind(Obj_Entry *obj, Elf_Size relo RtldLockState lockstate; rlock_acquire(rtld_bind_lock, &lockstate); - if (setjmp(lockstate.env) != 0) + if (sigsetjmp(lockstate.env, 0) != 0) lock_upgrade(rtld_bind_lock, &lockstate); if (obj->pltrel) rel = (const Elf_Rel *) ((caddr_t) obj->pltrel + reloff); @@ -2142,7 +2142,7 @@ dlopen(const char *name, int mode) ld_tracing = (mode & RTLD_TRACE) == 0 ? NULL : "1"; if (ld_tracing != NULL) { rlock_acquire(rtld_bind_lock, &lockstate); - if (setjmp(lockstate.env) != 0) + if (sigsetjmp(lockstate.env, 0) != 0) lock_upgrade(rtld_bind_lock, &lockstate); environ = (char **)*get_program_var_addr("environ", &lockstate); lock_release(rtld_bind_lock, &lockstate); @@ -2264,7 +2264,7 @@ do_dlsym(void *handle, const char *name, req.lockstate = &lockstate; rlock_acquire(rtld_bind_lock, &lockstate); - if (setjmp(lockstate.env) != 0) + if (sigsetjmp(lockstate.env, 0) != 0) lock_upgrade(rtld_bind_lock, &lockstate); if (handle == NULL || handle == RTLD_NEXT || handle == RTLD_DEFAULT || handle == RTLD_SELF) { Modified: head/libexec/rtld-elf/rtld.h ============================================================================== --- head/libexec/rtld-elf/rtld.h Wed Feb 9 08:01:45 2011 (r218475) +++ head/libexec/rtld-elf/rtld.h Wed Feb 9 09:20:27 2011 (r218476) @@ -276,7 +276,7 @@ typedef struct Struct_DoneList { struct Struct_RtldLockState { int lockstate; - jmp_buf env; + sigjmp_buf env; }; /* Modified: head/libexec/rtld-elf/rtld_lock.c ============================================================================== --- head/libexec/rtld-elf/rtld_lock.c Wed Feb 9 08:01:45 2011 (r218475) +++ head/libexec/rtld-elf/rtld_lock.c Wed Feb 9 09:20:27 2011 (r218476) @@ -259,7 +259,7 @@ lock_restart_for_upgrade(RtldLockState * case RTLD_LOCK_WLOCKED: break; case RTLD_LOCK_RLOCKED: - longjmp(lockstate->env, 1); + siglongjmp(lockstate->env, 1); break; default: assert(0); _______________________________________________ svn-src-head@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"