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Code Issues Projects Releases Packages Wiki Activity Actions 17

gh-90997: Show cached inline values in dis output (#92360)

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Brandt Bucher 2022-05-06 07:18:09 -07:00 • committed by GitHub
parent a79001ee16
commit 93a666b5a5
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4 changed files with 126 additions and 26 deletions
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24
Lib/dis.py
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@ -6,8 +6,14 @@ import collections
import io
from opcode import *
from opcode import __all__ as _opcodes_all
from opcode import _nb_ops, _inline_cache_entries, _specializations, _specialized_instructions
from opcode import (
__all__ as _opcodes_all,
_cache_format,
_inline_cache_entries,
_nb_ops,
_specializations,
_specialized_instructions,
)
__all__ = ["code_info", "dis", "disassemble", "distb", "disco",
"findlinestarts", "findlabels", "show_code",
@ -437,9 +443,6 @@ def _get_instructions_bytes(code, varname_from_oparg=None,
cache_counter = 0
for offset, op, arg in _unpack_opargs(code):
if cache_counter > 0:
if show_caches:
yield Instruction("CACHE", 0, None, None, '',
offset, None, False, None)
cache_counter -= 1
continue
if linestarts is not None:
@ -494,6 +497,17 @@ 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 cache_counter:
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:
argrepr = ""
def disassemble(co, lasti=-1, *, file=None, show_caches=False, adaptive=False):
"""Disassemble a code object."""