Add C API to notify when tracing/profiling is enabled or disabled
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- Dominant language
- Python
- Stars
- 77.2k
- Forks
- 35.9k
- PR merge metrics
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Description
Feature or enhancement
Proposal:
There is currently no way to be notified when tracing/profiling is enabled or disabled. This forces tools that want different behavior based on tracing/profiling enablement (e.g., JIT compilers) to poll on every function call, adding significant overhead.
PEP-523 established frame evaluation hooks as an officially supported extension point for JITs. However, JITs using this API have no efficient way to know when tracing/profiling is enabled and fall back to the interpreter.
I propose adding a small C API enhancement allowing callbacks to be registered when trace/profile functions are set or cleared.
Has this already been discussed elsewhere?
No response given
Links to previous discussion of this feature:
No response
Linked PRs
- gh-144691
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Review PEP-523, the frame evaluation hooks, and the existing trace/profile function set and clear paths; the issue does not name specific files or tests. The work is done when a C API lets tools register callbacks for tracing/profiling enablement changes without polling, with behavior aligned to the linked PR gh-144691.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- c, python
- Domain
- api, backend-api-design
- Issue type
- Feature
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 25/100