gdb/hurd: handle inferiors exiting
While testing on GNU/Hurd (i386) I noticed that GDB crashes when an
inferior exits, with this error:
inferior.c:293: internal-error: inferior* find_inferior_pid(process_stratum_target*, int): Assertion `pid != 0' failed.
The problem appears to be in gnu_nat_target::wait.
We always set inferior_ptid to null_ptid before calling target_wait,
this has been the case since the multi-target changes were made to GDB
in commit:
commit 5b6d1e4fa4fc6827c7b3f0e99ff120dfa14d65d2
Date: Fri Jan 10 20:06:08 2020 +0000
Multi-target support
With follow up changes in commit:
commit 24ed6739b699f329c2c45aedee5f8c7d2f54e493
Date: Thu Jan 30 14:35:40 2020 +0000
gdb/remote: Restore support for 'S' stop reply packet
Unfortunately, the GNU/Hurd target is still relying on the value of
inferior_ptid in the case where an inferior exits - we return the
value of inferior_ptid as the pid of the process that exited. This
was fine in the single target world, where inferior_ptid identified
the one running inferior, but this is no longer good enough.
Instead, we should return a ptid containing the pid of the process
that exited, as obtained from the wait event, and this is what this
commit does.
I've not run the full testsuite on GNU/Hurd as there appear to be lots
of other issues with this target that makes running the full testsuite
very painful, but I think this looks like a small easy improvement.
1 file changed
