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GH-93503: Add thread-specific APIs to set profiling and tracing functions in the C-API (#93504)

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* gh-93503: Add APIs to set profiling and tracing functions in all threads in the C-API

* Use a separate API

* Fix NEWS entry

* Add locks around the loop

* Document ignoring exceptions

* Use the new APIs in the sys module

* Update docs
This commit is contained in:
Pablo Galindo Salgado 2022-08-24 23:21:39 +01:00 • committed by GitHub
parent 657976ad95
commit e34c82abeb
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10 changed files with 271 additions and 4 deletions
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25
Lib/threading.py
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@ -28,7 +28,8 @@ __all__ = ['get_ident', 'active_count', 'Condition', 'current_thread',
'Event', 'Lock', 'RLock', 'Semaphore', 'BoundedSemaphore', 'Thread',
'Barrier', 'BrokenBarrierError', 'Timer', 'ThreadError',
'setprofile', 'settrace', 'local', 'stack_size',
'excepthook', 'ExceptHookArgs', 'gettrace', 'getprofile']
'excepthook', 'ExceptHookArgs', 'gettrace', 'getprofile',
'setprofile_all_threads','settrace_all_threads']
# Rename some stuff so "from threading import *" is safe
_start_new_thread = _thread.start_new_thread
@ -60,11 +61,20 @@ def setprofile(func):
The func will be passed to sys.setprofile() for each thread, before its
run() method is called.
"""
global _profile_hook
_profile_hook = func
def setprofile_all_threads(func):
"""Set a profile function for all threads started from the threading module
and all Python threads that are currently executing.
The func will be passed to sys.setprofile() for each thread, before its
run() method is called.
"""
setprofile(func)
_sys._setprofileallthreads(func)
def getprofile():
"""Get the profiler function as set by threading.setprofile()."""
return _profile_hook
@ -74,11 +84,20 @@ def settrace(func):
The func will be passed to sys.settrace() for each thread, before its run()
method is called.
"""
global _trace_hook
_trace_hook = func
def settrace_all_threads(func):
"""Set a trace function for all threads started from the threading module
and all Python threads that are currently executing.
The func will be passed to sys.settrace() for each thread, before its run()
method is called.
"""
settrace(func)
_sys._settraceallthreads(func)
def gettrace():
"""Get the trace function as set by threading.settrace()."""
return _trace_hook