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

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"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%.
This commit is contained in:
Mark Shannon 2021-05-07 15:19:19 +01:00 • committed by GitHub
parent b32c8e9795
commit adcd220556
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30 changed files with 6614 additions and 5687 deletions
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PC/launcher.c
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@ -1258,7 +1258,8 @@ static PYC_MAGIC magic_values[] = {
{ 3390, 3399, L"3.7" },
{ 3400, 3419, L"3.8" },
{ 3420, 3429, L"3.9" },
{ 3430, 3439, L"3.10" },
{ 3430, 3449, L"3.10" },
{ 3450, 3469, L"3.11" },
{ 0 }
};