mirrors/cpython
1
0
Fork 0
mirror of https://github.com/python/cpython.git synced 2025-08-24 18:55:00 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 8

GH-91389: Fix dis position information for CACHEs (GH-93663)

Browse source
This commit is contained in:
Brandt Bucher 2022-06-16 13:49:32 -07:00 • committed by GitHub
parent 4f85cec9e2
commit f8e576be0a
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
3 changed files with 58 additions and 12 deletions
Download patch file Download diff file Expand all files Collapse all files

32
Lib/dis.py
View file

@ -497,17 +497,29 @@ def _get_instructions_bytes(code, varname_from_oparg=None,
yield Instruction(_all_opname[op], op,
arg, argval, argrepr,
offset, starts_line, is_jump_target, positions)
if show_caches and _inline_cache_entries[deop]:
for name, caches in _cache_format[opname[deop]].items():
data = code[offset + 2: offset + 2 + caches * 2]
argrepr = f"{name}: {int.from_bytes(data, sys.byteorder)}"
for _ in range(caches):
offset += 2
yield Instruction(
"CACHE", 0, 0, None, argrepr, offset, None, False, None
)
# Only show the actual value for the first cache entry:
caches = _inline_cache_entries[deop]
if not caches:
continue
if not show_caches:
# We still need to advance the co_positions iterator:
for _ in range(caches):
next(co_positions, ())
continue
for name, size in _cache_format[opname[deop]].items():
for i in range(size):
offset += 2
# Only show the fancy argrepr for a CACHE instruction when it's
# the first entry for a particular cache value and the
# instruction using it is actually quickened:
if i == 0 and op != deop:
data = code[offset: offset + 2 * size]
argrepr = f"{name}: {int.from_bytes(data, sys.byteorder)}"
else:
argrepr = ""
yield Instruction(
"CACHE", CACHE, 0, None, argrepr, offset, None, False,
Positions(*next(co_positions, ()))
)
def disassemble(co, lasti=-1, *, file=None, show_caches=False, adaptive=False):
"""Disassemble a code object."""