xnu-517.tar.gz

[apple/xnu.git] / bsd / kern / kern_fork.c

diff --git a/bsd/kern/kern_fork.c b/bsd/kern/kern_fork.c
index b67a669064f416aa354cb755ec3ffa05e0d0dc1a..ba5682953454d3cdbadcdf84d7d5c51871602425 100644 (file)
--- a/bsd/kern/kern_fork.c
+++ b/bsd/kern/kern_fork.c
@@ -1,5 +1,5 @@
 /*
 /*

- * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2003 Apple Computer, Inc. All rights reserved.

  *
  * @APPLE_LICENSE_HEADER_START@
  * 
  *
  * @APPLE_LICENSE_HEADER_START@
  * 


@@ -63,6 +63,7 @@
  *     @(#)kern_fork.c 8.8 (Berkeley) 2/14/95
  */
 
  *     @(#)kern_fork.c 8.8 (Berkeley) 2/14/95
  */
 

+#include <kern/assert.h>

 #include <sys/param.h>
 #include <sys/systm.h>
 #include <sys/filedesc.h>
 #include <sys/param.h>
 #include <sys/systm.h>
 #include <sys/filedesc.h>


@@ -74,6 +75,7 @@
 #include <sys/vnode.h>
 #include <sys/file.h>
 #include <sys/acct.h>
 #include <sys/vnode.h>
 #include <sys/file.h>
 #include <sys/acct.h>

+#include <sys/kern_audit.h>

 #if KTRACE
 #include <sys/ktrace.h>
 #endif
 #if KTRACE
 #include <sys/ktrace.h>
 #endif


@@ -146,6 +148,7 @@ vfork(p, uap, retval)
        ut = (struct uthread *)get_bsdthread_info(cur_act);
        if (ut->uu_flag & P_VFORK) {
                printf("vfork called recursively by %s\n", p->p_comm);
        ut = (struct uthread *)get_bsdthread_info(cur_act);
        if (ut->uu_flag & P_VFORK) {
                printf("vfork called recursively by %s\n", p->p_comm);

+               (void)chgproccnt(uid, -1);

                return (EINVAL);
        }
        p->p_flag  |= P_VFORK;
                return (EINVAL);
        }
        p->p_flag  |= P_VFORK;


@@ -204,7 +207,6 @@ vfork_return(th_act, p, p2, retval)
 {
        long flags;
        register uid_t uid;
 {
        long flags;
        register uid_t uid;

-       thread_t newth, self = current_thread();

        thread_act_t cur_act = (thread_act_t)current_act();
        int s, count;
        task_t t;
        thread_act_t cur_act = (thread_act_t)current_act();
        int s, count;
        task_t t;


@@ -245,12 +247,13 @@ procdup(
        thread_act_t            thread;
        task_t                  task;
        kern_return_t   result;
        thread_act_t            thread;
        task_t                  task;
        kern_return_t   result;

+       pmap_t                  pmap;

        extern task_t kernel_task;
 
        if (parent->task == kernel_task)
        extern task_t kernel_task;
 
        if (parent->task == kernel_task)

-               result = task_create_local(TASK_NULL, FALSE, FALSE, &task);
+               result = task_create_internal(TASK_NULL, FALSE, &task);

        else
        else

-               result = task_create_local(parent->task, TRUE, FALSE, &task);
+               result = task_create_internal(parent->task, TRUE, &task);

        if (result != KERN_SUCCESS)
            printf("fork/procdup: task_create failed. Code: 0x%x\n", result);
        child->task = task;
        if (result != KERN_SUCCESS)
            printf("fork/procdup: task_create failed. Code: 0x%x\n", result);
        child->task = task;


@@ -258,6 +261,7 @@ procdup(
        set_bsdtask_info(task, child);
        if (child->p_nice != 0)
                resetpriority(child);
        set_bsdtask_info(task, child);
        if (child->p_nice != 0)
                resetpriority(child);

+               

        result = thread_create(task, &thread);
        if (result != KERN_SUCCESS)
            printf("fork/procdup: thread_create failed. Code: 0x%x\n", result);
        result = thread_create(task, &thread);
        if (result != KERN_SUCCESS)
            printf("fork/procdup: thread_create failed. Code: 0x%x\n", result);


@@ -333,6 +337,8 @@ fork1(p1, flags, retval)
         }
         act_deallocate(newth);
 
         }
         act_deallocate(newth);
 

+       KNOTE(&p1->p_klist, NOTE_FORK | p2->p_pid);
+

        while (p2->p_flag & P_PPWAIT)
                tsleep(p1, PWAIT, "ppwait", 0);
 
        while (p2->p_flag & P_PPWAIT)
                tsleep(p1, PWAIT, "ppwait", 0);
 


@@ -464,18 +470,26 @@ again:
            (unsigned) ((caddr_t)&p2->p_endcopy - (caddr_t)&p2->p_startcopy));
        p2->vm_shm = (void *)NULL; /* Make sure it is zero */
 
            (unsigned) ((caddr_t)&p2->p_endcopy - (caddr_t)&p2->p_startcopy));
        p2->vm_shm = (void *)NULL; /* Make sure it is zero */
 

+       /*
+        * Copy the audit info.
+        */
+       audit_proc_fork(p1, p2);
+

        /*
         * Duplicate sub-structures as needed.
         * Increase reference counts on shared objects.
         * The p_stats and p_sigacts substructs are set in vm_fork.
         */
        p2->p_flag = P_INMEM;
        /*
         * Duplicate sub-structures as needed.
         * Increase reference counts on shared objects.
         * The p_stats and p_sigacts substructs are set in vm_fork.
         */
        p2->p_flag = P_INMEM;

+       p2->p_flag |= (p1->p_flag & P_CLASSIC); // copy from parent
+       p2->p_flag |= (p1->p_flag & P_AFFINITY); // copy from parent

        if (p1->p_flag & P_PROFIL)
                startprofclock(p2);
        bcopy(p1->p_cred, p2->p_cred, sizeof(*p2->p_cred));
        p2->p_cred->p_refcnt = 1;
        crhold(p1->p_ucred);
        lockinit(&p2->p_cred->pc_lock, PLOCK, "proc cred", 0, 0);
        if (p1->p_flag & P_PROFIL)
                startprofclock(p2);
        bcopy(p1->p_cred, p2->p_cred, sizeof(*p2->p_cred));
        p2->p_cred->p_refcnt = 1;
        crhold(p1->p_ucred);
        lockinit(&p2->p_cred->pc_lock, PLOCK, "proc cred", 0, 0);

+       klist_init(&p2->p_klist);

 
        /* bump references to the text vnode */
        p2->p_textvp = p1->p_textvp;
 
        /* bump references to the text vnode */
        p2->p_textvp = p1->p_textvp;


@@ -515,6 +529,8 @@ again:
        if (p1->p_session->s_ttyvp != NULL && p1->p_flag & P_CONTROLT)
                p2->p_flag |= P_CONTROLT;
 
        if (p1->p_session->s_ttyvp != NULL && p1->p_flag & P_CONTROLT)
                p2->p_flag |= P_CONTROLT;
 

+       p2->p_argslen = p1->p_argslen;
+       p2->p_argc = p1->p_argc;

        p2->p_xstat = 0;
        p2->p_ru = NULL;
 
        p2->p_xstat = 0;
        p2->p_ru = NULL;
 


@@ -527,10 +543,13 @@ again:
        p2->sigwait_thread = NULL;
        p2->exit_thread = NULL;
        p2->user_stack = p1->user_stack;
        p2->sigwait_thread = NULL;
        p2->exit_thread = NULL;
        p2->user_stack = p1->user_stack;

-       p2->p_xxxsigpending = 0;

        p2->p_vforkcnt = 0;
        p2->p_vforkact = 0;
        TAILQ_INIT(&p2->p_uthlist);
        p2->p_vforkcnt = 0;
        p2->p_vforkact = 0;
        TAILQ_INIT(&p2->p_uthlist);

+       TAILQ_INIT(&p2->aio_activeq);
+       TAILQ_INIT(&p2->aio_doneq);
+       p2->aio_active_count = 0;
+       p2->aio_done_count = 0;

 
 #if KTRACE
        /*
 
 #if KTRACE
        /*


@@ -581,7 +600,7 @@ uthread_alloc(task_t task, thread_act_t thr_act )
 
        if (task != kernel_task) {
                uth = (struct uthread *)ut;
 
        if (task != kernel_task) {
                uth = (struct uthread *)ut;

-               p = get_bsdtask_info(task);
+               p = (struct proc *) get_bsdtask_info(task);

 
                funnel_state = thread_funnel_set(kernel_flock, TRUE);
                uth_parent = (struct uthread *)get_bsdthread_info(current_act());
 
                funnel_state = thread_funnel_set(kernel_flock, TRUE);
                uth_parent = (struct uthread *)get_bsdthread_info(current_act());


@@ -612,6 +631,15 @@ uthread_free(task_t task, void *uthread, void * bsd_info)
        extern task_t kernel_task;
        int size;
        boolean_t funnel_state;
        extern task_t kernel_task;
        int size;
        boolean_t funnel_state;

+       struct nlminfo *nlmp;
+
+       /*
+        * Per-thread audit state should never last beyond system
+        * call return.  Since we don't audit the thread creation/
+        * removal, the thread state pointer should never be
+        * non-NULL when we get here.
+        */
+       assert(uth->uu_ar == NULL);

 
        sel = &uth->uu_state.ss_select;
        /* cleanup the select bit space */
 
        sel = &uth->uu_state.ss_select;
        /* cleanup the select bit space */


@@ -628,6 +656,11 @@ uthread_free(task_t task, void *uthread, void * bsd_info)
                sel->wql = 0;
        }
 
                sel->wql = 0;
        }
 

+       if ((nlmp = uth->uu_nlminfo)) {
+               uth->uu_nlminfo = 0;
+               FREE(nlmp, M_LOCKF);
+       }
+

        if ((task != kernel_task) && p) {
                funnel_state = thread_funnel_set(kernel_flock, TRUE);
                //signal_lock(p);
        if ((task != kernel_task) && p) {
                funnel_state = thread_funnel_set(kernel_flock, TRUE);
                //signal_lock(p);