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authorPedro Alves <palves@redhat.com>2018-11-22 16:09:12 +0000
committerPedro Alves <palves@redhat.com>2018-11-22 16:09:12 +0000
commit151bb4a5059e73934f7bc61318efaaffe0c91b81 (patch)
tree1fc2e95d8a6fe37949f6ee0d3893aaaca32474b7 /gdb/python
parent79a9468c702f7087b5bbff2cfd2210a94e7c5fa4 (diff)
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Avoid find_thread_ptid with null_ptid
With a following patch, find_thread_ptid will first find the inferior for the passed-in ptid, using find_inferior_pid, and then look for the thread in that inferior's thread list. If we pass down null_ptid to find_thread_ptid then that means we'll end up passing 0 to find_inferior_pid, which hits this assertion: > struct inferior * > find_inferior_pid (int pid) > { > struct inferior *inf; > > /* Looking for inferior pid == 0 is always wrong, and indicative of > a bug somewhere else. There may be more than one with pid == 0, > for instance. */ > gdb_assert (pid != 0); This patch prepares for the change, by avoiding passing down null_ptid to find_thread_ptid or to functions that naturally use it, such as the target_pid_to_str call in inferior.c:add_inferior. In that latter case, the patch changes GDB output, from: (gdb) add-inferior [New inferior 2 (process 0)] to: (gdb) add-inferior [New inferior 2] which seems like a good change to me. It might not even make sense to talk about "process" for the current target, for example. The python_on_normal_stop change ends up avoiding looking up the same thread twice (inferior_thread also does a look up). gdb/ChangeLog: 2018-11-22 Pedro Alves <palves@redhat.com> * cli/cli-interp.c (cli_on_user_selected_context_changed): Use inferior_thread instead of find_thread_ptid, and only when inferior_ptid is not null_ptid. * inferior.c (add_inferior): Don't include target_pid_to_str output when the inferior is not started. * python/py-inferior.c (python_on_normal_stop): Don't use find_thread_ptid. (tui_on_user_selected_context_changed): Use inferior_thread instead of find_thread_ptid, and only when inferior_ptid is not null_ptid.
Diffstat (limited to 'gdb/python')
-rw-r--r--gdb/python/py-inferior.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/gdb/python/py-inferior.c b/gdb/python/py-inferior.c
index e987cfe..7b378ca 100644
--- a/gdb/python/py-inferior.c
+++ b/gdb/python/py-inferior.c
@@ -86,8 +86,8 @@ python_on_normal_stop (struct bpstats *bs, int print_frame)
if (!gdb_python_initialized)
return;
- if (!find_thread_ptid (inferior_ptid))
- return;
+ if (inferior_ptid == null_ptid)
+ return;
stop_signal = inferior_thread ()->suspend.stop_signal;