sys_process.c (27067774dce3388702a4cf744d7096c6fb71b688) sys_process.c (e5574e096619bfaceff8d1a394c76c598a8885c4)
1/*-
2 * Copyright (c) 1994, Sean Eric Fagan
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright

--- 679 unchanged lines hidden (view full) ---

688 (safe ? proc_write_ ## w ## 32(t, a) : EINVAL ) : \
689 proc_write_ ## w (t, a)
690#else
691#define PROC_READ(w, t, a) proc_read_ ## w (t, a)
692#define PROC_WRITE(w, t, a) proc_write_ ## w (t, a)
693#endif
694
695void
1/*-
2 * Copyright (c) 1994, Sean Eric Fagan
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright

--- 679 unchanged lines hidden (view full) ---

688 (safe ? proc_write_ ## w ## 32(t, a) : EINVAL ) : \
689 proc_write_ ## w (t, a)
690#else
691#define PROC_READ(w, t, a) proc_read_ ## w (t, a)
692#define PROC_WRITE(w, t, a) proc_write_ ## w (t, a)
693#endif
694
695void
696proc_set_traced(struct proc *p)
696proc_set_traced(struct proc *p, bool stop)
697{
698
699 PROC_LOCK_ASSERT(p, MA_OWNED);
700 p->p_flag |= P_TRACED;
697{
698
699 PROC_LOCK_ASSERT(p, MA_OWNED);
700 p->p_flag |= P_TRACED;
701 p->p_flag2 |= P2_PTRACE_FSTP;
701 if (stop)
702 p->p_flag2 |= P2_PTRACE_FSTP;
702 p->p_ptevents = PTRACE_DEFAULT;
703 p->p_oppid = p->p_pptr->p_pid;
704}
705
706int
707kern_ptrace(struct thread *td, int req, pid_t pid, void *addr, int data)
708{
709 struct iovec iov;

--- 195 unchanged lines hidden (view full) ---

905 * Actually do the requests
906 */
907
908 td->td_retval[0] = 0;
909
910 switch (req) {
911 case PT_TRACE_ME:
912 /* set my trace flag and "owner" so it can read/write me */
703 p->p_ptevents = PTRACE_DEFAULT;
704 p->p_oppid = p->p_pptr->p_pid;
705}
706
707int
708kern_ptrace(struct thread *td, int req, pid_t pid, void *addr, int data)
709{
710 struct iovec iov;

--- 195 unchanged lines hidden (view full) ---

906 * Actually do the requests
907 */
908
909 td->td_retval[0] = 0;
910
911 switch (req) {
912 case PT_TRACE_ME:
913 /* set my trace flag and "owner" so it can read/write me */
913 proc_set_traced(p);
914 proc_set_traced(p, false);
914 if (p->p_flag & P_PPWAIT)
915 p->p_flag |= P_PPTRACE;
916 CTR1(KTR_PTRACE, "PT_TRACE_ME: pid %d", p->p_pid);
917 break;
918
919 case PT_ATTACH:
920 /* security check done above */
921 /*
922 * It would be nice if the tracing relationship was separate
923 * from the parent relationship but that would require
924 * another set of links in the proc struct or for "wait"
925 * to scan the entire proc table. To make life easier,
926 * we just re-parent the process we're trying to trace.
927 * The old parent is remembered so we can put things back
928 * on a "detach".
929 */
915 if (p->p_flag & P_PPWAIT)
916 p->p_flag |= P_PPTRACE;
917 CTR1(KTR_PTRACE, "PT_TRACE_ME: pid %d", p->p_pid);
918 break;
919
920 case PT_ATTACH:
921 /* security check done above */
922 /*
923 * It would be nice if the tracing relationship was separate
924 * from the parent relationship but that would require
925 * another set of links in the proc struct or for "wait"
926 * to scan the entire proc table. To make life easier,
927 * we just re-parent the process we're trying to trace.
928 * The old parent is remembered so we can put things back
929 * on a "detach".
930 */
930 proc_set_traced(p);
931 proc_set_traced(p, true);
931 if (p->p_pptr != td->td_proc) {
932 proc_reparent(p, td->td_proc);
933 }
934 data = SIGSTOP;
935 CTR2(KTR_PTRACE, "PT_ATTACH: pid %d, oppid %d", p->p_pid,
936 p->p_oppid);
937 goto sendsig; /* in PT_CONTINUE below */
938

--- 511 unchanged lines hidden --- 		932 if (p->p_pptr != td->td_proc) {
933 proc_reparent(p, td->td_proc);
934 }
935 data = SIGSTOP;
936 CTR2(KTR_PTRACE, "PT_ATTACH: pid %d, oppid %d", p->p_pid,
937 p->p_oppid);
938 goto sendsig; /* in PT_CONTINUE below */
939

--- 511 unchanged lines hidden ---