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bpo-40222: "Zero cost" exception handling - #25729

Merged

markshannon merged 45 commits into

python:mainfrom

faster-cpython:zero-cost-except

May 7, 2021

Merged

bpo-40222: "Zero cost" exception handling#25729
markshannon merged 45 commits into
python:mainfrom
faster-cpython:zero-cost-except

Commits on Apr 19, 2021
- Add SETUP_CLEANUP bytecode to track lasti for re-raising exceptions in cleanup code.
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  a414fa6
Commits on Apr 21, 2021
- Move some handling of exceptions to bytecode from unwind code.
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  902690d
- Move setting up except block out of unwind code into bytecode.
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  21646b1
- Move cleanup code for try-finally and try-except in bytecode.
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  9c9575a
- Move cleanup code for with and sync with into bytecode.
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  3be89db
- Simplify exit code for async for loops.
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  cf664f7
- Remove SETUP_EXCEPT opcode.
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- Remove EXCEPT_HANDLER as a type of exception handling block.
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  caa355f
- Factor out all block pops and pushes into simple opcodes.
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Commits on Apr 22, 2021
- Generate exception handling table
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  6a8d90c
Commits on Apr 23, 2021
- Parse and verify exception table when unwinding exceptions.
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Commits on Apr 26, 2021
Commits on Apr 29, 2021
- Make dis understand the exception table.
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- Merge branch 'master' into zero-cost-except
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Commits on Apr 30, 2021
- Set line numbers at start of exception handlers in try-except and try-fianlly correctly.
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- Handle exceptions in trace functions correctly.
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  58b4a5a
- Fix syntax error test.
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  e7a9221
- Get frame.setlineno working again.
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  062ffa4
- Merge branch 'master' into zero-cost-except
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  71d95c1
- Remove debugging prints
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  e5c2c3e
- Fix test_dis after merge
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  7571e90
- Layout frameobject in most compact form.
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  812e78f
- Add NEWS.
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  5801089
- Remove SETUP_FINALLY, SETUP_ASYNC_WITH, SETUP_CLEANUP, POP_BLOCK instructions
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  8cb6366
- Update dis.rst
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  4ec3417
- fix NEWS formatting
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  07cd46d
- Fix typos and clarify text.
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  3b52a3f
- Restore dis after discarded experiment.
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  594a636
- Bump magic number for 3.11
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  585f306
- Fix typo
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Commits on May 3, 2021
- Merge branch 'master' into zero-cost-except
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  63a9b0e
- Re-order optimization passes to remove more NOPs.
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  133f74f
- Update importlib yet again.
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  299e051
Commits on May 6, 2021
- Assorted clarifications.
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  43c199d
- Rename frame.setlineno assistant code to clarify that we now model the evaluation stack, not the block stack.
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  630e755
- Revert mistaken change.
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  6333f6c
- Update Include/opcode.h
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- Extend notes on exception handling.
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Commits on May 7, 2021
- Fix refleaks
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  f263ee2
- Merge branch 'main' into zero-cost-except
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  2f31c84
- Document removal frame push/pop C-API functions.
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  0c3fd95
- Update importlib
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  b92ada2
- Clarify exception handling notes
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  1878117

Commits

Commits on Apr 19, 2021

Commits on Apr 21, 2021

Commits on Apr 22, 2021

Commits on Apr 23, 2021

Commits on Apr 26, 2021

Commits on Apr 29, 2021

Commits on Apr 30, 2021

Commits on May 3, 2021

Commits on May 6, 2021

Commits on May 7, 2021