GDBserver: Pass process_info pointer to target_kill

We start from a process_info pointer, pass down process->pid, and
then the target_kill implementations need to find the process from the
pid again.  Pass the process_info pointer down directly instead.

gdb/gdbserver/ChangeLog:
2018-07-13  Pedro Alves  <palves@redhat.com>

	* linux-low.c (linux_kill): Change parameter to process_info
	pointer instead of pid.  Adjust.
	* lynx-low.c (lynx_kill): Likewise.
	* nto-low.c (nto_kill): Likewise.
	* spu-low.c (spu_kill): Likewise.
	* win32-low.c (win32_kill): Likewise.
	* server.c (handle_v_kill, kill_inferior_callback)
	(detach_or_kill_for_exit): Adjust.
	* target.c (kill_inferior): Change parameter to process_info
	pointer instead of pid.  Adjust.
	* target.h (struct target_ops) <kill>: Change parameter to
	process_info pointer instead of pid.  Adjust all implementations
	and callers.
	(kill_inferior): Likewise.

1 files changed, 7 insertions, 6 deletions

diff --git a/gdb/gdbserver/server.c b/gdb/gdbserver/server.c
index b35015b..a491ae0 100644
--- a/gdb/gdbserver/server.c
+++ b/gdb/gdbserver/server.c
@@ -3080,7 +3080,10 @@ handle_v_kill (char *own_buf)
     pid = strtol (p, NULL, 16);
   else
     pid = signal_pid;
-  if (pid != 0 && kill_inferior (pid) == 0)
+
+  process_info *proc = find_process_pid (pid);
+
+  if (proc != nullptr && kill_inferior (proc) == 0)
     {
       cs.last_status.kind = TARGET_WAITKIND_SIGNALLED;
       cs.last_status.value.sig = GDB_SIGNAL_KILL;
@@ -3481,10 +3484,8 @@ gdbserver_show_disableable (FILE *stream)
 static void
 kill_inferior_callback (process_info *process)
 {
-  int pid = process->pid;
-
-  kill_inferior (pid);
-  discard_queued_stop_replies (ptid_t (pid));
+  kill_inferior (process);
+  discard_queued_stop_replies (ptid_t (process->pid));
 }
 
 /* Call this when exiting gdbserver with possible inferiors that need
@@ -3528,7 +3529,7 @@ detach_or_kill_for_exit (void)
     if (process->attached)
       detach_inferior (process);
     else
-      kill_inferior (pid);
+      kill_inferior (process);
 
     discard_queued_stop_replies (ptid_t (pid));
   });