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Title: bpo-40222: "Zero cost" exception handling by markshannon · Pull Request #25729 · python/cpython · GitHub

Open Graph Title: bpo-40222: "Zero cost" exception handling by markshannon · Pull Request #25729 · python/cpython

X Title: bpo-40222: "Zero cost" exception handling by markshannon · Pull Request #25729 · python/cpython

Description: For example, this function: def f(): try: g(0) except: return "fail" compiles as follows on main: 2 0 SETUP_FINALLY 7 (to 16) 3 2 LOAD_G...

Open Graph Description: For example, this function: def f(): try: g(0) except: return "fail" compiles as follows on main: 2 0 SETUP_FINALLY 7 (to 16) 3 ...

X Description: For example, this function: def f(): try: g(0) except: return "fail" compiles as follows on main: 2 0 SETUP_FINALLY 7 (to 16) 3 ...

Opengraph URL: https://github.com/python/cpython/pull/25729

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April 19, 2021 14:33https://github.com/python/cpython/pull/25729#commits-pushed-a414fa6
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Add SETUP_CLEANUP bytecode to track lasti for re-raising exceptions i…https://github.com/python/cpython/pull/25729/commits/a414fa623f2bb425b0cba95c03a46310c3c4c6d6
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Move some handling of exceptions to bytecode from unwind code.https://github.com/python/cpython/pull/25729/commits/902690d10b1eb14f05df62ece5145289908c97a2
902690dhttps://github.com/python/cpython/pull/25729/commits/902690d10b1eb14f05df62ece5145289908c97a2
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Move setting up except block out of unwind code into bytecode.https://github.com/python/cpython/pull/25729/commits/21646b10fefdf1999fd0a4511ad726cddaefb369
21646b1https://github.com/python/cpython/pull/25729/commits/21646b10fefdf1999fd0a4511ad726cddaefb369
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Move cleanup code for try-finally and try-except in bytecode.https://github.com/python/cpython/pull/25729/commits/9c9575ae5a19dbe56ddd55acc7a79aa3abedab3a
9c9575ahttps://github.com/python/cpython/pull/25729/commits/9c9575ae5a19dbe56ddd55acc7a79aa3abedab3a
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Move cleanup code for with and sync with into bytecode.https://github.com/python/cpython/pull/25729/commits/3be89dbafc043cb39d5cfcd94e32d203551524a4
3be89dbhttps://github.com/python/cpython/pull/25729/commits/3be89dbafc043cb39d5cfcd94e32d203551524a4
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Simplify exit code for async for loops.https://github.com/python/cpython/pull/25729/commits/cf664f7f8ab31df3024e2492c78f72fac0291540
cf664f7https://github.com/python/cpython/pull/25729/commits/cf664f7f8ab31df3024e2492c78f72fac0291540
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Remove SETUP_EXCEPT opcode.https://github.com/python/cpython/pull/25729/commits/722b7225488e06bc2fd56d413d3ea5f08036c984
722b722https://github.com/python/cpython/pull/25729/commits/722b7225488e06bc2fd56d413d3ea5f08036c984
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Remove EXCEPT_HANDLER as a type of exception handling block.https://github.com/python/cpython/pull/25729/commits/caa355f04660f005e2fa27ed6eaebd0fb06121e7
caa355fhttps://github.com/python/cpython/pull/25729/commits/caa355f04660f005e2fa27ed6eaebd0fb06121e7
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Factor out all block pops and pushes into simple opcodes.https://github.com/python/cpython/pull/25729/commits/4c21ddd190521036bcf71ed579fc9f49f07b74d9
4c21dddhttps://github.com/python/cpython/pull/25729/commits/4c21ddd190521036bcf71ed579fc9f49f07b74d9
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Generate exception handling tablehttps://github.com/python/cpython/pull/25729/commits/6a8d90c0789d7f323428a51cf5197893f7a22f16
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Parse and verify exception table when unwinding exceptions.https://github.com/python/cpython/pull/25729/commits/9115cea2ac00553ccde1fab1f016800547a10668
9115ceahttps://github.com/python/cpython/pull/25729/commits/9115cea2ac00553ccde1fab1f016800547a10668
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Update test to account for new code object constructor.https://github.com/python/cpython/pull/25729/commits/350334cb55fe3201c4fb0ce2afb7077de30ad4dd
350334chttps://github.com/python/cpython/pull/25729/commits/350334cb55fe3201c4fb0ce2afb7077de30ad4dd
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Push lasti to stack when cleaning up exception handlers, and use it t…https://github.com/python/cpython/pull/25729/commits/d6da9cbeac6b1cd7386bfec18adb8d077764d616
d6da9cbhttps://github.com/python/cpython/pull/25729/commits/d6da9cbeac6b1cd7386bfec18adb8d077764d616
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Remove block stack from frames add convert SETUP/POP_BLOCK instructio…https://github.com/python/cpython/pull/25729/commits/a6b9292b05b1f6bc9752024c0b3b8d2c5ed93b28
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Make dis understand the exception table.https://github.com/python/cpython/pull/25729/commits/9d0a6c1aaa42be0a10d90856f9926c250046fead
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Merge branch 'master' into zero-cost-excepthttps://github.com/python/cpython/pull/25729/commits/ca482d0770a509b76a3aa6c36d52994a33ad56fa
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April 30, 2021 14:21https://github.com/python/cpython/pull/25729#commits-pushed-4629a97
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Set line numbers at start of exception handlers in try-except and try…https://github.com/python/cpython/pull/25729/commits/4629a97ac7b81c59bd10412e711884a05445ab99
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Handle exceptions in trace functions correctly.https://github.com/python/cpython/pull/25729/commits/58b4a5a41c749c6d4930e25779d8581fc6a5a999
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Fix syntax error test.https://github.com/python/cpython/pull/25729/commits/e7a9221e4b6ed4f6bbdf4174226557f83416f205
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Get frame.setlineno working again.https://github.com/python/cpython/pull/25729/commits/062ffa41262fd96dc3cbce8740ec3c60d934a060
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April 30, 2021 14:41https://github.com/python/cpython/pull/25729#commits-pushed-71d95c1
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Merge branch 'master' into zero-cost-excepthttps://github.com/python/cpython/pull/25729/commits/71d95c11e07ab7ce86fea0c719ff0e067168d92f
71d95c1https://github.com/python/cpython/pull/25729/commits/71d95c11e07ab7ce86fea0c719ff0e067168d92f
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Remove debugging printshttps://github.com/python/cpython/pull/25729/commits/e5c2c3e1e09b74f6ea81704548bf295157b64488
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Fix test_dis after mergehttps://github.com/python/cpython/pull/25729/commits/7571e90b38c59adc0354bfa67b70d7963a956038
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Layout frameobject in most compact form.https://github.com/python/cpython/pull/25729/commits/812e78f4b0f9c6f05d27a69a955004c2449a76c2
812e78fhttps://github.com/python/cpython/pull/25729/commits/812e78f4b0f9c6f05d27a69a955004c2449a76c2
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May 6, 2021https://github.com/python/cpython/pull/25729#event-4692843877
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May 6, 2021 11:15https://github.com/python/cpython/pull/25729#commits-pushed-43c199d
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Assorted clarifications.https://github.com/python/cpython/pull/25729/commits/43c199dd8581cf095462fe47a0a2896103d79775
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Rename frame.setlineno assistant code to clarify that we now model th…https://github.com/python/cpython/pull/25729/commits/630e7553db83c042e8b34ac8482a02fd360f6e39
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Revert mistaken change.https://github.com/python/cpython/pull/25729/commits/6333f6c5b9b9237bd75fd695591588c29259cf44
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May 6, 2021 11:18https://github.com/python/cpython/pull/25729#event-4694527425
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Update Include/opcode.hhttps://github.com/python/cpython/pull/25729/commits/e1d6e1e2de2bc5768006afd2c5ac1742289f1c6b
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