[Bug gdb/31211] [gdb] info checkpoints show incorrect info

["vries at gcc dot gnu.org" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=31211

--- Comment #1 from Tom de Vries <vries at gcc dot gnu.org> ---
With this patch:
...
diff --git a/gdb/linux-fork.c b/gdb/linux-fork.c
index 1430ff89fa7..4f34c72ef8e 100644
--- a/gdb/linux-fork.c
+++ b/gdb/linux-fork.c
@@ -594,12 +594,13 @@ info_checkpoints_command (const char *arg, int from_tty)
        continue;

       printed = &fi;
-      if (fi.ptid == inferior_ptid)
+      bool is_current = fi.ptid == inferior_ptid;
+      if (is_current)
        gdb_printf ("* ");
       else
        gdb_printf ("  ");

-      ULONGEST pc = fi.pc;
+      ULONGEST pc = is_current ? get_frame_pc (get_current_frame ()) : fi.pc ;
       gdb_printf ("%d %s", fi.num, target_pid_to_str (fi.ptid).c_str ());
       if (fi.num == 0)
        gdb_printf (_(" (main process)"));
...
we get:
...
$ gdb -q a.out
Reading symbols from a.out...
(gdb) start
Temporary breakpoint 1 at 0x40051b: file test.c, line 6.
Starting program: /data/vries/gdb/a.out 

Temporary breakpoint 1, main () at test.c:6
6         printf ("1\n");
(gdb) checkpoint
checkpoint 1: fork returned pid 9696.
(gdb) info checkpoint
* 0 process 9693 (main process) at 0x40051b, file test.c, line 6
  1 process 9696 at 0x40051b, file test.c, line 6
(gdb) n
1
7         printf ("2\n");
(gdb) info checkpoint
* 0 process 9693 (main process) at 0x400525, file test.c, line 7
  1 process 9696 at 0x40051b, file test.c, line 6
(gdb) 
...

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