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Fix DAP frame bug with older versions of Python

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Tom de Vries pointed out that one DAP test failed on Python 3.6
because gdb.Frame is not hashable.

This patch fixes the problem by using a list to hold the frames.  This
is less efficient but there normally won't be that many frames.

Tested-by: Tom de Vries <tdevries@suse.de>
This commit is contained in:
Tom Tromey 2023-03-14 07:05:13 -06:00
parent 97b75c421f
commit 85c72d708e
1 changed files with 15 additions and 18 deletions
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33
gdb/python/lib/gdb/dap/frames.py
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@ -18,20 +18,17 @@ import gdb
from .startup import in_gdb_thread
# Map from frame (thread,level) pair to frame ID numbers. Note we
# can't use the frame itself here as it is not hashable.
_frame_ids = {}
# Map from frame ID number back to frames.
_id_to_frame = {}
# A list of all the frames we've reported. A frame's index in the
# list is its ID. We don't use a hash here because frames are not
# hashable.
_all_frames = []
# Clear all the frame IDs.
@in_gdb_thread
def _clear_frame_ids(evt):
global _frame_ids, _id_to_frame
_frame_ids = {}
_id_to_frame = {}
global _all_frames
_all_frames = []
# Clear the frame ID map whenever the inferior runs.
@ -41,17 +38,17 @@ gdb.events.cont.connect(_clear_frame_ids)
@in_gdb_thread
def frame_id(frame):
"""Return the frame identifier for FRAME."""
global _frame_ids, _id_to_frame
pair = (gdb.selected_thread().global_num, frame.level)
if pair not in _frame_ids:
id = len(_frame_ids)
_frame_ids[pair] = id
_id_to_frame[id] = frame
return _frame_ids[pair]
global _all_frames
for i in range(0, len(_all_frames)):
if _all_frames[i] == frame:
return i
result = len(_all_frames)
_all_frames.append(frame)
return result
@in_gdb_thread
def frame_for_id(id):
"""Given a frame identifier ID, return the corresponding frame."""
global _id_to_frame
return _id_to_frame[id]
global _all_frames
return _all_frames[id]