MFC 303002: Include process IDs in core dumps.

When threads were added to the kernel, the pr_pid member of the
NT_PRSTATUS note was repurposed to store LWP IDs instead of process
IDs.  However, the process ID was no longer recorded in core dumps.
This change adds a pr_pid field to prpsinfo (NT_PRSINFO).  Rather than
bumping the prpsinfo version number, note parsers can use the note's
payload size to determine if pr_pid is present.

1 files changed, 1 insertions, 0 deletions

diff --git a/sys/kern/imgact_elf.c b/sys/kern/imgact_elf.c
index 7dc785b..293a65d 100644
--- a/sys/kern/imgact_elf.c
+++ b/sys/kern/imgact_elf.c
@@ -1835,6 +1835,7 @@ __elfN(note_prpsinfo)(void *arg, struct sbuf *sb, size_t *sizep)
 				*cp = ' ';
 			}
 		}
+		psinfo->pr_pid = p->p_pid;
 		sbuf_bcat(sb, psinfo, sizeof(*psinfo));
 		free(psinfo, M_TEMP);
 	}