Add kdb_thr_from_pid(), which given a PID returns the first thread

in the process. This is useful when working from or with a process.

2 files changed, 17 insertions, 2 deletions

diff --git a/sys/kern/subr_kdb.c b/sys/kern/subr_kdb.c
index 0fc015e..e2ea277 100644
--- a/sys/kern/subr_kdb.c
+++ b/sys/kern/subr_kdb.c
@@ -316,7 +316,21 @@ kdb_thr_first(void)
 }
 
 struct thread *
-kdb_thr_lookup(pid_t tid)
+kdb_thr_from_pid(pid_t pid)
+{
+	struct proc *p;
+
+	p = LIST_FIRST(&allproc);
+	while (p != NULL) {
+		if (p->p_sflag & PS_INMEM && p->p_pid == pid)
+			return (FIRST_THREAD_IN_PROC(p));
+		p = LIST_NEXT(p, p_list);
+	}
+	return (NULL);
+}
+
+struct thread *
+kdb_thr_lookup(lwpid_t tid)
 {
 	struct thread *thr;
 
diff --git a/sys/sys/kdb.h b/sys/sys/kdb.h
index 6a1b8f7..55a88f4 100644
--- a/sys/sys/kdb.h
+++ b/sys/sys/kdb.h
@@ -71,7 +71,8 @@ void *	kdb_jmpbuf(jmp_buf);
 void	kdb_reenter(void);
 struct pcb *kdb_thr_ctx(struct thread *);
 struct thread *kdb_thr_first(void);
-struct thread *kdb_thr_lookup(pid_t);
+struct thread *kdb_thr_from_pid(pid_t);
+struct thread *kdb_thr_lookup(lwpid_t);
 struct thread *kdb_thr_next(struct thread *);
 int	kdb_thr_select(struct thread *);
 int	kdb_trap(int, int, struct trapframe *);