Stowage/cpython
2
0
Fork 0
mirror of https://github.com/python/cpython.git synced 2025-12-31 04:23:37 +00:00
Code Issues Projects Releases Packages Wiki Activity

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

Browse source 
"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
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
30 changed files with 6614 additions and 5687 deletions
Download patch file Download diff file Expand all files Collapse all files

7
Modules/_opcode.c
View file

@ -59,7 +59,12 @@ _opcode_stack_effect_impl(PyObject *module, int opcode, PyObject *oparg,
"stack_effect: jump must be False, True or None");
return -1;
}
effect = PyCompile_OpcodeStackEffectWithJump(opcode, oparg_int, jump_int);
if (IS_ARTIFICIAL(opcode)) {
effect = PY_INVALID_STACK_EFFECT;
}
else {
effect = PyCompile_OpcodeStackEffectWithJump(opcode, oparg_int, jump_int);
}
if (effect == PY_INVALID_STACK_EFFECT) {
PyErr_SetString(PyExc_ValueError,
"invalid opcode or oparg");