Improve error-handling in Python Extensions#6986
Merged
steven-johnson merged 4 commits intomainfrom Aug 31, 2022
Merged
Conversation
Currently, Python Extensions don't make any effort to override `halide_error`, so the default (which aborts) is generally used... this is very unfriendly. This modifies the standard Python Extension glue code to hook halide_error, saving the text in a thread local, and then throwing a Python exception after the extension's AOT call is finished (if an error occurred, of course). Also does a drive-by default hooking of `halide_print` to ensure that it goes to whatever Python thinks that `stdout` is. (Note that it would be really nice if we could use closures of some sort for halide_error, halide_print, etc so that we could save context in the actual Python module, rather than in a thread-local global var, but this currently isn't possible without nontrivial refactoring in the Halide runtime.)
steven-johnson
added
release_notes
ardier
pushed a commit
to ardier/Halide-mutation
that referenced
this pull request
Mar 3, 2024
* Improve error-handling in Python Extensions Currently, Python Extensions don't make any effort to override `halide_error`, so the default (which aborts) is generally used... this is very unfriendly. This modifies the standard Python Extension glue code to hook halide_error, saving the text in a thread local, and then throwing a Python exception after the extension's AOT call is finished (if an error occurred, of course). Also does a drive-by default hooking of `halide_print` to ensure that it goes to whatever Python thinks that `stdout` is. (Note that it would be really nice if we could use closures of some sort for halide_error, halide_print, etc so that we could save context in the actual Python module, rather than in a thread-local global var, but this currently isn't possible without nontrivial refactoring in the Halide runtime.) * Make Windows happy * Remove dangling code bits * Allow defeating of error-handler via HALIDE_PYTHON_EXTENSION_OMIT_ERROR_AND_PRINT_HANDLERS
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.
Currently, Python Extensions don't make any effort to override
halide_error, so the default (which aborts) is generally used... this is very unfriendly. This modifies the standard Python Extension glue code to hook halide_error, saving the text in a thread local, and then throwing a Python exception after the extension's AOT call is finished (if an error occurred, of course).Also does a drive-by default hooking of
halide_printto ensure that it goes to whatever Python thinks thatstdoutis.(Note that it would be really nice if we could use closures of some sort for halide_error, halide_print, etc so that we could save context in the actual Python module, rather than in a thread-local global var, but this currently isn't possible without nontrivial refactoring in the Halide runtime.)