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Add gdb.free_objfile event registry

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Currently, Python code can use event registries to detect when gdb
loads a new objfile, and when gdb clears the objfile list.  However,
there's no way to detect the removal of an objfile, say when the
inferior calls dlclose.

This patch adds a gdb.free_objfile event registry and arranges for an
event to be emitted in this case.
This commit is contained in:
Tom Tromey 2022-06-20 11:30:04 -06:00
parent 23948f5602
commit 0b4fe76f95
9 changed files with 208 additions and 0 deletions
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15
gdb/python/py-inferior.c
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@ -197,6 +197,20 @@ python_new_objfile (struct objfile *objfile)
}
}
/* Emit a Python event when an objfile is about to be removed. */
static void
python_free_objfile (struct objfile *objfile)
{
if (!gdb_python_initialized)
return;
gdbpy_enter enter_py (objfile->arch ());
if (emit_free_objfile_event (objfile) < 0)
gdbpy_print_stack ();
}
/* Return a reference to the Python object of type Inferior
representing INFERIOR. If the object has already been created,
return it and increment the reference count, otherwise, create it.
@ -853,6 +867,7 @@ gdbpy_initialize_inferior (void)
gdb::observers::new_objfile.attach
(python_new_objfile, "py-inferior",
{ &auto_load_new_objfile_observer_token });
gdb::observers::free_objfile.attach (python_free_objfile, "py-inferior");
gdb::observers::inferior_added.attach (python_new_inferior, "py-inferior");
gdb::observers::inferior_removed.attach (python_inferior_deleted,
"py-inferior");