gh-131565: Implement ctypes.util.dllist() in the _ctypes extension#154255
Open
serhiy-storchaka wants to merge 1 commit into
Open
gh-131565: Implement ctypes.util.dllist() in the _ctypes extension#154255serhiy-storchaka wants to merge 1 commit into
serhiy-storchaka wants to merge 1 commit into
Conversation
On NetBSD dl_iterate_phdr() reports only the link-map group of the calling object. Called through ctypes, the caller is libffi's closure trampoline, which belongs to no object, so only the main executable was reported. Calling dl_iterate_phdr() from the _ctypes extension module makes _ctypes the caller and reports all loaded shared libraries. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
serhiy-storchaka
requested review from
AA-Turner,
corona10,
emmatyping,
erlend-aasland and
itamaro
as code owners
July 20, 2026 12:29
serhiy-storchaka
added
extension-modules
Member
|
(Tagging Peter for his interest in ctypes.) |
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
ctypes.util.dllist()returned only the main executable on NetBSD, because NetBSD'sdl_iterate_phdr()enumerates only the link-map group of the calling object. Called through ctypes, the caller is libffi's closure trampoline, which belongs to no object, so nothing else was reported (verified on NetBSD 10: a C helper.socallingdl_iterate_phdr()reports all objects, while the ctypes path reports 1).Implement
dllist()as a small C helper in the_ctypesextension, so the caller is_ctypesand all loaded shared libraries are reported. The pure-Pythondl_iterate_phdr()wrapper inctypes.utilis replaced byfrom _ctypes import dllist. Apple platforms keep their dyld-based implementation (the C helper is gated out there).Verified on NetBSD 10 (now 24 objects, was 1), Linux (20), OpenBSD 7 (23) and FreeBSD 15 (26);
test_dllistpasses on all four.Fixes the root cause investigated in gh-131565. CC @WardBrian
🤖 Generated with Claude Code