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author	Mark Shannon <mark@hotpy.org>
	Fri, 7 May 2021 14:19:19 +0000 (15:19 +0100)
committer	GitHub <noreply@github.com>
	Fri, 7 May 2021 14:19:19 +0000 (15:19 +0100)
commit	adcd2205565f91c6719f4141ab4e1da6d7086126
tree	0953b285944eccde57b05b8f3c7e30fb501a3d64	tree \| snapshot
parent	b32c8e97951db46484ba3b646b988bcdc4062199	commit \| diff

bpo-40222: "Zero cost" exception handling (GH-25729)

"Zero cost" exception handling.

* Uses a lookup table to determine how to handle exceptions.
* Removes SETUP_FINALLY and POP_TOP block instructions, eliminating (most of) the runtime overhead of try statements.
* Reduces the size of the frame object by about 60%.

30 files changed:

Doc/library/dis.rst		diff \| blob \| blame \| history
Doc/whatsnew/3.11.rst		diff \| blob \| blame \| history
Include/cpython/code.h		diff \| blob \| blame \| history
Include/cpython/frameobject.h		diff \| blob \| blame \| history
Include/opcode.h		diff \| blob \| blame \| history
Lib/ctypes/test/test_values.py		diff \| blob \| blame \| history
Lib/dis.py		diff \| blob \| blame \| history
Lib/importlib/_bootstrap_external.py		diff \| blob \| blame \| history
Lib/opcode.py		diff \| blob \| blame \| history
Lib/test/test_code.py		diff \| blob \| blame \| history
Lib/test/test_dis.py		diff \| blob \| blame \| history
Lib/test/test_exceptions.py		diff \| blob \| blame \| history
Lib/test/test_sys.py		diff \| blob \| blame \| history
Lib/test/test_sys_settrace.py		diff \| blob \| blame \| history
Misc/NEWS.d/next/Core and Builtins/2021-04-30-15-48-36.bpo-40222.j3VxeX.rst	[new file with mode: 0644]	blob
Modules/_opcode.c		diff \| blob \| blame \| history
Objects/clinic/codeobject.c.h		diff \| blob \| blame \| history
Objects/codeobject.c		diff \| blob \| blame \| history
Objects/exception_handling_notes.txt	[new file with mode: 0644]	blob
Objects/frameobject.c		diff \| blob \| blame \| history
PC/launcher.c		diff \| blob \| blame \| history
Python/ceval.c		diff \| blob \| blame \| history
Python/compile.c		diff \| blob \| blame \| history
Python/frozen_hello.h		diff \| blob \| blame \| history
Python/importlib.h		diff \| blob \| blame \| history
Python/importlib_external.h		diff \| blob \| blame \| history
Python/importlib_zipimport.h		diff \| blob \| blame \| history
Python/marshal.c		diff \| blob \| blame \| history
Python/opcode_targets.h		diff \| blob \| blame \| history
Tools/scripts/generate_opcode_h.py		diff \| blob \| blame \| history

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