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Code Issues Releases Activity

Check for an exiting process when enabling PID provider probes.

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MFC after:	1 week
This commit is contained in:
Mark Johnston 2017-02-15 01:35:26 +00:00
parent 92b87cdb24
commit 2fce30fa8f
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=313755
1 changed files with 7 additions and 7 deletions
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14
sys/cddl/contrib/opensolaris/uts/common/dtrace/fasttrap.c
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@ -1248,6 +1248,13 @@ fasttrap_pid_enable(void *arg, dtrace_id_t id, void *parg)
#else
if ((p = pfind(probe->ftp_pid)) == NULL)
return;
if ((p->p_flag & P_WEXIT) != 0) {
PROC_UNLOCK(p);
return;
}
_PHOLD(p);
PROC_UNLOCK(p);
#endif
/*
@ -1255,13 +1262,6 @@ fasttrap_pid_enable(void *arg, dtrace_id_t id, void *parg)
* the chance to execute the trap instruction we're about to place
* in their process's text.
*/
#ifdef __FreeBSD__
/*
* pfind() returns a locked process.
*/
_PHOLD(p);
PROC_UNLOCK(p);
#endif
fasttrap_enable_callbacks();
/*