diff options
Diffstat (limited to 'sys/kern/kern_fork.c')
| -rw-r--r-- | sys/kern/kern_fork.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/sys/kern/kern_fork.c b/sys/kern/kern_fork.c index 2d15339a4894..71fe803c4653 100644 --- a/sys/kern/kern_fork.c +++ b/sys/kern/kern_fork.c @@ -37,6 +37,7 @@ #include <sys/cdefs.h> __FBSDID("$FreeBSD$"); +#include "opt_kdtrace.h" #include "opt_ktrace.h" #include "opt_mac.h" @@ -63,6 +64,7 @@ __FBSDID("$FreeBSD$"); #include <sys/ktr.h> #include <sys/ktrace.h> #include <sys/unistd.h> +#include <sys/sdt.h> #include <sys/sx.h> #include <sys/signalvar.h> @@ -75,6 +77,16 @@ __FBSDID("$FreeBSD$"); #include <vm/vm_extern.h> #include <vm/uma.h> +#ifdef KDTRACE_HOOKS +#include <sys/dtrace_bsd.h> +dtrace_fork_func_t dtrace_fasttrap_fork; +#endif + +SDT_PROVIDER_DECLARE(proc); +SDT_PROBE_DEFINE(proc, kernel, , create); +SDT_PROBE_ARGTYPE(proc, kernel, , create, 0, "struct proc *"); +SDT_PROBE_ARGTYPE(proc, kernel, , create, 1, "struct proc *"); +SDT_PROBE_ARGTYPE(proc, kernel, , create, 2, "int"); #ifndef _SYS_SYSPROTO_H_ struct fork_args { @@ -620,6 +632,15 @@ again: p2->p_pfsflags = p1->p_pfsflags; } +#ifdef KDTRACE_HOOKS + /* + * Tell the DTrace fasttrap provider about the new process + * if it has registered an interest. + */ + if (dtrace_fasttrap_fork) + dtrace_fasttrap_fork(p1, p2); +#endif + /* * This begins the section where we must prevent the parent * from being swapped. @@ -707,6 +728,8 @@ again: * Tell any interested parties about the new process. */ knote_fork(&p1->p_klist, p2->p_pid); + SDT_PROBE(proc, kernel, , create, p2, p1, flags, 0, 0); + /* * Preserve synchronization semantics of vfork. If waiting for * child to exec or exit, set P_PPWAIT on child, and sleep on our |