diff options
| author | Kurt Miller <kurt@cvs.openbsd.org> | 2007-07-08 01:53:47 +0000 |
|---|---|---|
| committer | Kurt Miller <kurt@cvs.openbsd.org> | 2007-07-08 01:53:47 +0000 |
| commit | 3af16637fc581e5a3b3607fe9d38d4803cfb953b (patch) | |
| tree | f82829b7143b55a2c8da9c0a64c555c4b45dee1e /lib/librthread | |
| parent | 799cf67bb03aa2c0445b96187ee22bc05ed0b6b0 (diff) | |
Report the correct stack size and top for the primordial thread in
pthread_stackseg_np(). With input and okay marc@
Diffstat (limited to 'lib/librthread')
| -rw-r--r-- | lib/librthread/rthread_np.c | 37 |
1 files changed, 21 insertions, 16 deletions
diff --git a/lib/librthread/rthread_np.c b/lib/librthread/rthread_np.c index d4388fff479..cb36095a917 100644 --- a/lib/librthread/rthread_np.c +++ b/lib/librthread/rthread_np.c @@ -1,4 +1,4 @@ -/* $OpenBSD: rthread_np.c,v 1.4 2006/04/12 13:34:12 henning Exp $ */ +/* $OpenBSD: rthread_np.c,v 1.5 2007/07/08 01:53:46 kurt Exp $ */ /* * Copyright (c) 2004,2005 Ted Unangst <tedu@openbsd.org> * Copyright (c) 2005 Otto Moerbeek <otto@openbsd.org> @@ -18,12 +18,15 @@ */ #include <sys/param.h> +#include <sys/time.h> #include <sys/lock.h> +#include <sys/resource.h> #include <sys/queue.h> #include <errno.h> #include <pthread.h> #include <pthread_np.h> +#include <stddef.h> #include <string.h> #include <unistd.h> @@ -58,32 +61,34 @@ pthread_stackseg_np(pthread_t thread, stack_t *sinfo) char *base; size_t pgsz; int ret; + struct rlimit rl; if (thread->stack) { base = thread->stack->base; #if !defined(MACHINE_STACK_GROWS_UP) - base += thread->stack->len; + base += (ptrdiff_t)thread->stack->len; #endif sinfo->ss_sp = base; sinfo->ss_size = thread->stack->len; sinfo->ss_flags = 0; ret = 0; } else if (thread == &_initial_thread) { - pgsz = sysconf(_SC_PAGESIZE); + if (getrlimit(RLIMIT_STACK, &rl) != 0) + return (EAGAIN); + pgsz = (size_t)sysconf(_SC_PAGESIZE); if (pgsz == (size_t)-1) - ret = EAGAIN; - else { -#if defined(MACHINE_STACK_GROWS_UP) - base = (caddr_t) USRSTACK; -#else - base = (caddr_t) ((USRSTACK - DFLSSIZ) & ~(pgsz - 1)); - base += DFLSSIZ; -#endif - sinfo->ss_sp = base; - sinfo->ss_size = DFLSSIZ; - sinfo->ss_flags = 0; - ret = 0; - } + return (EAGAIN); + /* + * round_page() stack rlim_cur and + * trunc_page() USRSTACK to be consistent with + * the way the kernel sets up the stack. + */ + sinfo->ss_size = (size_t)rl.rlim_cur; + sinfo->ss_size += (pgsz - 1); + sinfo->ss_size &= ~(pgsz - 1); + sinfo->ss_sp = (caddr_t) (USRSTACK & ~(pgsz - 1)); + sinfo->ss_flags = 0; + ret = 0; } else ret = EAGAIN; |