mirror of https://github.com/python/cpython
500 lines
19 KiB
Python
500 lines
19 KiB
Python
"""Deep freeze
|
|
|
|
The script may be executed by _bootstrap_python interpreter.
|
|
Shared library extension modules are not available in that case.
|
|
On Windows, and in cross-compilation cases, it is executed
|
|
by Python 3.10, and 3.11 features are not available.
|
|
"""
|
|
import argparse
|
|
import ast
|
|
import builtins
|
|
import collections
|
|
import contextlib
|
|
import os
|
|
import re
|
|
import time
|
|
import types
|
|
from typing import Dict, FrozenSet, TextIO, Tuple
|
|
|
|
import umarshal
|
|
from generate_global_objects import get_identifiers_and_strings
|
|
|
|
verbose = False
|
|
identifiers, strings = get_identifiers_and_strings()
|
|
|
|
# This must be kept in sync with opcode.py
|
|
RESUME = 151
|
|
|
|
def isprintable(b: bytes) -> bool:
|
|
return all(0x20 <= c < 0x7f for c in b)
|
|
|
|
|
|
def make_string_literal(b: bytes) -> str:
|
|
res = ['"']
|
|
if isprintable(b):
|
|
res.append(b.decode("ascii").replace("\\", "\\\\").replace("\"", "\\\""))
|
|
else:
|
|
for i in b:
|
|
res.append(f"\\x{i:02x}")
|
|
res.append('"')
|
|
return "".join(res)
|
|
|
|
|
|
CO_FAST_LOCAL = 0x20
|
|
CO_FAST_CELL = 0x40
|
|
CO_FAST_FREE = 0x80
|
|
|
|
next_code_version = 1
|
|
|
|
def get_localsplus(code: types.CodeType):
|
|
a = collections.defaultdict(int)
|
|
for name in code.co_varnames:
|
|
a[name] |= CO_FAST_LOCAL
|
|
for name in code.co_cellvars:
|
|
a[name] |= CO_FAST_CELL
|
|
for name in code.co_freevars:
|
|
a[name] |= CO_FAST_FREE
|
|
return tuple(a.keys()), bytes(a.values())
|
|
|
|
|
|
def get_localsplus_counts(code: types.CodeType,
|
|
names: Tuple[str, ...],
|
|
kinds: bytes) -> Tuple[int, int, int, int]:
|
|
nlocals = 0
|
|
ncellvars = 0
|
|
nfreevars = 0
|
|
assert len(names) == len(kinds)
|
|
for name, kind in zip(names, kinds):
|
|
if kind & CO_FAST_LOCAL:
|
|
nlocals += 1
|
|
if kind & CO_FAST_CELL:
|
|
ncellvars += 1
|
|
elif kind & CO_FAST_CELL:
|
|
ncellvars += 1
|
|
elif kind & CO_FAST_FREE:
|
|
nfreevars += 1
|
|
assert nlocals == len(code.co_varnames) == code.co_nlocals, \
|
|
(nlocals, len(code.co_varnames), code.co_nlocals)
|
|
assert ncellvars == len(code.co_cellvars)
|
|
assert nfreevars == len(code.co_freevars)
|
|
return nlocals, ncellvars, nfreevars
|
|
|
|
|
|
PyUnicode_1BYTE_KIND = 1
|
|
PyUnicode_2BYTE_KIND = 2
|
|
PyUnicode_4BYTE_KIND = 4
|
|
|
|
|
|
def analyze_character_width(s: str) -> Tuple[int, bool]:
|
|
maxchar = ' '
|
|
for c in s:
|
|
maxchar = max(maxchar, c)
|
|
ascii = False
|
|
if maxchar <= '\xFF':
|
|
kind = PyUnicode_1BYTE_KIND
|
|
ascii = maxchar <= '\x7F'
|
|
elif maxchar <= '\uFFFF':
|
|
kind = PyUnicode_2BYTE_KIND
|
|
else:
|
|
kind = PyUnicode_4BYTE_KIND
|
|
return kind, ascii
|
|
|
|
|
|
def removesuffix(base: str, suffix: str) -> str:
|
|
if base.endswith(suffix):
|
|
return base[:len(base) - len(suffix)]
|
|
return base
|
|
|
|
class Printer:
|
|
|
|
def __init__(self, file: TextIO) -> None:
|
|
self.level = 0
|
|
self.file = file
|
|
self.cache: Dict[tuple[type, object, str], str] = {}
|
|
self.hits, self.misses = 0, 0
|
|
self.finis: list[str] = []
|
|
self.inits: list[str] = []
|
|
self.write('#include "Python.h"')
|
|
self.write('#include "internal/pycore_gc.h"')
|
|
self.write('#include "internal/pycore_code.h"')
|
|
self.write('#include "internal/pycore_frame.h"')
|
|
self.write('#include "internal/pycore_long.h"')
|
|
self.write("")
|
|
|
|
@contextlib.contextmanager
|
|
def indent(self) -> None:
|
|
save_level = self.level
|
|
try:
|
|
self.level += 1
|
|
yield
|
|
finally:
|
|
self.level = save_level
|
|
|
|
def write(self, arg: str) -> None:
|
|
self.file.writelines((" "*self.level, arg, "\n"))
|
|
|
|
@contextlib.contextmanager
|
|
def block(self, prefix: str, suffix: str = "") -> None:
|
|
self.write(prefix + " {")
|
|
with self.indent():
|
|
yield
|
|
self.write("}" + suffix)
|
|
|
|
def object_head(self, typename: str) -> None:
|
|
with self.block(".ob_base =", ","):
|
|
self.write(f".ob_refcnt = 999999999,")
|
|
self.write(f".ob_type = &{typename},")
|
|
|
|
def object_var_head(self, typename: str, size: int) -> None:
|
|
with self.block(".ob_base =", ","):
|
|
self.object_head(typename)
|
|
self.write(f".ob_size = {size},")
|
|
|
|
def field(self, obj: object, name: str) -> None:
|
|
self.write(f".{name} = {getattr(obj, name)},")
|
|
|
|
def generate_bytes(self, name: str, b: bytes) -> str:
|
|
if b == b"":
|
|
return "(PyObject *)&_Py_SINGLETON(bytes_empty)"
|
|
if len(b) == 1:
|
|
return f"(PyObject *)&_Py_SINGLETON(bytes_characters[{b[0]}])"
|
|
self.write("static")
|
|
with self.indent():
|
|
with self.block("struct"):
|
|
self.write("PyObject_VAR_HEAD")
|
|
self.write("Py_hash_t ob_shash;")
|
|
self.write(f"char ob_sval[{len(b) + 1}];")
|
|
with self.block(f"{name} =", ";"):
|
|
self.object_var_head("PyBytes_Type", len(b))
|
|
self.write(".ob_shash = -1,")
|
|
self.write(f".ob_sval = {make_string_literal(b)},")
|
|
return f"& {name}.ob_base.ob_base"
|
|
|
|
def generate_unicode(self, name: str, s: str) -> str:
|
|
if s in strings:
|
|
return f"&_Py_STR({strings[s]})"
|
|
if s in identifiers:
|
|
return f"&_Py_ID({s})"
|
|
if re.match(r'\A[A-Za-z0-9_]+\Z', s):
|
|
name = f"const_str_{s}"
|
|
kind, ascii = analyze_character_width(s)
|
|
if kind == PyUnicode_1BYTE_KIND:
|
|
datatype = "uint8_t"
|
|
elif kind == PyUnicode_2BYTE_KIND:
|
|
datatype = "uint16_t"
|
|
else:
|
|
datatype = "uint32_t"
|
|
self.write("static")
|
|
with self.indent():
|
|
with self.block("struct"):
|
|
if ascii:
|
|
self.write("PyASCIIObject _ascii;")
|
|
else:
|
|
self.write("PyCompactUnicodeObject _compact;")
|
|
self.write(f"{datatype} _data[{len(s)+1}];")
|
|
with self.block(f"{name} =", ";"):
|
|
if ascii:
|
|
with self.block("._ascii =", ","):
|
|
self.object_head("PyUnicode_Type")
|
|
self.write(f".length = {len(s)},")
|
|
self.write(".hash = -1,")
|
|
with self.block(".state =", ","):
|
|
self.write(".kind = 1,")
|
|
self.write(".compact = 1,")
|
|
self.write(".ascii = 1,")
|
|
self.write(f"._data = {make_string_literal(s.encode('ascii'))},")
|
|
return f"& {name}._ascii.ob_base"
|
|
else:
|
|
with self.block("._compact =", ","):
|
|
with self.block("._base =", ","):
|
|
self.object_head("PyUnicode_Type")
|
|
self.write(f".length = {len(s)},")
|
|
self.write(".hash = -1,")
|
|
with self.block(".state =", ","):
|
|
self.write(f".kind = {kind},")
|
|
self.write(".compact = 1,")
|
|
self.write(".ascii = 0,")
|
|
utf8 = s.encode('utf-8')
|
|
self.write(f'.utf8 = {make_string_literal(utf8)},')
|
|
self.write(f'.utf8_length = {len(utf8)},')
|
|
with self.block(f"._data =", ","):
|
|
for i in range(0, len(s), 16):
|
|
data = s[i:i+16]
|
|
self.write(", ".join(map(str, map(ord, data))) + ",")
|
|
return f"& {name}._compact._base.ob_base"
|
|
|
|
|
|
def generate_code(self, name: str, code: types.CodeType) -> str:
|
|
global next_code_version
|
|
# The ordering here matches PyCode_NewWithPosOnlyArgs()
|
|
# (but see below).
|
|
co_consts = self.generate(name + "_consts", code.co_consts)
|
|
co_names = self.generate(name + "_names", code.co_names)
|
|
co_filename = self.generate(name + "_filename", code.co_filename)
|
|
co_name = self.generate(name + "_name", code.co_name)
|
|
co_qualname = self.generate(name + "_qualname", code.co_qualname)
|
|
co_linetable = self.generate(name + "_linetable", code.co_linetable)
|
|
co_exceptiontable = self.generate(name + "_exceptiontable", code.co_exceptiontable)
|
|
# These fields are not directly accessible
|
|
localsplusnames, localspluskinds = get_localsplus(code)
|
|
co_localsplusnames = self.generate(name + "_localsplusnames", localsplusnames)
|
|
co_localspluskinds = self.generate(name + "_localspluskinds", localspluskinds)
|
|
# Derived values
|
|
nlocals, ncellvars, nfreevars = \
|
|
get_localsplus_counts(code, localsplusnames, localspluskinds)
|
|
co_code_adaptive = make_string_literal(code.co_code)
|
|
self.write("static")
|
|
with self.indent():
|
|
self.write(f"struct _PyCode_DEF({len(code.co_code)})")
|
|
with self.block(f"{name} =", ";"):
|
|
self.object_var_head("PyCode_Type", len(code.co_code) // 2)
|
|
# But the ordering here must match that in cpython/code.h
|
|
# (which is a pain because we tend to reorder those for perf)
|
|
# otherwise MSVC doesn't like it.
|
|
self.write(f".co_consts = {co_consts},")
|
|
self.write(f".co_names = {co_names},")
|
|
self.write(f".co_exceptiontable = {co_exceptiontable},")
|
|
self.field(code, "co_flags")
|
|
self.write("._co_linearray_entry_size = 0,")
|
|
self.field(code, "co_argcount")
|
|
self.field(code, "co_posonlyargcount")
|
|
self.field(code, "co_kwonlyargcount")
|
|
# The following should remain in sync with _PyFrame_NumSlotsForCodeObject
|
|
self.write(f".co_framesize = {code.co_stacksize + len(localsplusnames)} + FRAME_SPECIALS_SIZE,")
|
|
self.field(code, "co_stacksize")
|
|
self.field(code, "co_firstlineno")
|
|
self.write(f".co_nlocalsplus = {len(localsplusnames)},")
|
|
self.field(code, "co_nlocals")
|
|
self.write(f".co_ncellvars = {ncellvars},")
|
|
self.write(f".co_nfreevars = {nfreevars},")
|
|
self.write(f".co_version = {next_code_version},")
|
|
next_code_version += 1
|
|
self.write(f".co_localsplusnames = {co_localsplusnames},")
|
|
self.write(f".co_localspluskinds = {co_localspluskinds},")
|
|
self.write(f".co_filename = {co_filename},")
|
|
self.write(f".co_name = {co_name},")
|
|
self.write(f".co_qualname = {co_qualname},")
|
|
self.write(f".co_linetable = {co_linetable},")
|
|
self.write(f"._co_cached = NULL,")
|
|
self.write("._co_linearray = NULL,")
|
|
self.write(f".co_code_adaptive = {co_code_adaptive},")
|
|
for i, op in enumerate(code.co_code[::2]):
|
|
if op == RESUME:
|
|
self.write(f"._co_firsttraceable = {i},")
|
|
break
|
|
name_as_code = f"(PyCodeObject *)&{name}"
|
|
self.finis.append(f"_PyStaticCode_Fini({name_as_code});")
|
|
self.inits.append(f"_PyStaticCode_Init({name_as_code})")
|
|
return f"& {name}.ob_base.ob_base"
|
|
|
|
def generate_tuple(self, name: str, t: Tuple[object, ...]) -> str:
|
|
if len(t) == 0:
|
|
return f"(PyObject *)& _Py_SINGLETON(tuple_empty)"
|
|
items = [self.generate(f"{name}_{i}", it) for i, it in enumerate(t)]
|
|
self.write("static")
|
|
with self.indent():
|
|
with self.block("struct"):
|
|
self.write("PyGC_Head _gc_head;")
|
|
with self.block("struct", "_object;"):
|
|
self.write("PyObject_VAR_HEAD")
|
|
if t:
|
|
self.write(f"PyObject *ob_item[{len(t)}];")
|
|
with self.block(f"{name} =", ";"):
|
|
with self.block("._object =", ","):
|
|
self.object_var_head("PyTuple_Type", len(t))
|
|
if items:
|
|
with self.block(f".ob_item =", ","):
|
|
for item in items:
|
|
self.write(item + ",")
|
|
return f"& {name}._object.ob_base.ob_base"
|
|
|
|
def _generate_int_for_bits(self, name: str, i: int, digit: int) -> None:
|
|
sign = -1 if i < 0 else 0 if i == 0 else +1
|
|
i = abs(i)
|
|
digits: list[int] = []
|
|
while i:
|
|
i, rem = divmod(i, digit)
|
|
digits.append(rem)
|
|
self.write("static")
|
|
with self.indent():
|
|
with self.block("struct"):
|
|
self.write("PyObject_VAR_HEAD")
|
|
self.write(f"digit ob_digit[{max(1, len(digits))}];")
|
|
with self.block(f"{name} =", ";"):
|
|
self.object_var_head("PyLong_Type", sign*len(digits))
|
|
if digits:
|
|
ds = ", ".join(map(str, digits))
|
|
self.write(f".ob_digit = {{ {ds} }},")
|
|
|
|
def generate_int(self, name: str, i: int) -> str:
|
|
if -5 <= i <= 256:
|
|
return f"(PyObject *)&_PyLong_SMALL_INTS[_PY_NSMALLNEGINTS + {i}]"
|
|
if i >= 0:
|
|
name = f"const_int_{i}"
|
|
else:
|
|
name = f"const_int_negative_{abs(i)}"
|
|
if abs(i) < 2**15:
|
|
self._generate_int_for_bits(name, i, 2**15)
|
|
else:
|
|
connective = "if"
|
|
for bits_in_digit in 15, 30:
|
|
self.write(f"#{connective} PYLONG_BITS_IN_DIGIT == {bits_in_digit}")
|
|
self._generate_int_for_bits(name, i, 2**bits_in_digit)
|
|
connective = "elif"
|
|
self.write("#else")
|
|
self.write('#error "PYLONG_BITS_IN_DIGIT should be 15 or 30"')
|
|
self.write("#endif")
|
|
# If neither clause applies, it won't compile
|
|
return f"& {name}.ob_base.ob_base"
|
|
|
|
def generate_float(self, name: str, x: float) -> str:
|
|
with self.block(f"static PyFloatObject {name} =", ";"):
|
|
self.object_head("PyFloat_Type")
|
|
self.write(f".ob_fval = {x},")
|
|
return f"&{name}.ob_base"
|
|
|
|
def generate_complex(self, name: str, z: complex) -> str:
|
|
with self.block(f"static PyComplexObject {name} =", ";"):
|
|
self.object_head("PyComplex_Type")
|
|
self.write(f".cval = {{ {z.real}, {z.imag} }},")
|
|
return f"&{name}.ob_base"
|
|
|
|
def generate_frozenset(self, name: str, fs: FrozenSet[object]) -> str:
|
|
try:
|
|
fs = sorted(fs)
|
|
except TypeError:
|
|
# frozen set with incompatible types, fallback to repr()
|
|
fs = sorted(fs, key=repr)
|
|
ret = self.generate_tuple(name, tuple(fs))
|
|
self.write("// TODO: The above tuple should be a frozenset")
|
|
return ret
|
|
|
|
def generate_file(self, module: str, code: object)-> None:
|
|
module = module.replace(".", "_")
|
|
self.generate(f"{module}_toplevel", code)
|
|
self.write(EPILOGUE.format(name=module))
|
|
|
|
def generate(self, name: str, obj: object) -> str:
|
|
# Use repr() in the key to distinguish -0.0 from +0.0
|
|
key = (type(obj), obj, repr(obj))
|
|
if key in self.cache:
|
|
self.hits += 1
|
|
# print(f"Cache hit {key!r:.40}: {self.cache[key]!r:.40}")
|
|
return self.cache[key]
|
|
self.misses += 1
|
|
if isinstance(obj, (types.CodeType, umarshal.Code)) :
|
|
val = self.generate_code(name, obj)
|
|
elif isinstance(obj, tuple):
|
|
val = self.generate_tuple(name, obj)
|
|
elif isinstance(obj, str):
|
|
val = self.generate_unicode(name, obj)
|
|
elif isinstance(obj, bytes):
|
|
val = self.generate_bytes(name, obj)
|
|
elif obj is True:
|
|
return "Py_True"
|
|
elif obj is False:
|
|
return "Py_False"
|
|
elif isinstance(obj, int):
|
|
val = self.generate_int(name, obj)
|
|
elif isinstance(obj, float):
|
|
val = self.generate_float(name, obj)
|
|
elif isinstance(obj, complex):
|
|
val = self.generate_complex(name, obj)
|
|
elif isinstance(obj, frozenset):
|
|
val = self.generate_frozenset(name, obj)
|
|
elif obj is builtins.Ellipsis:
|
|
return "Py_Ellipsis"
|
|
elif obj is None:
|
|
return "Py_None"
|
|
else:
|
|
raise TypeError(
|
|
f"Cannot generate code for {type(obj).__name__} object")
|
|
# print(f"Cache store {key!r:.40}: {val!r:.40}")
|
|
self.cache[key] = val
|
|
return val
|
|
|
|
|
|
EPILOGUE = """
|
|
PyObject *
|
|
_Py_get_{name}_toplevel(void)
|
|
{{
|
|
return Py_NewRef((PyObject *) &{name}_toplevel);
|
|
}}
|
|
"""
|
|
|
|
FROZEN_COMMENT_C = "/* Auto-generated by Programs/_freeze_module.c */"
|
|
FROZEN_COMMENT_PY = "/* Auto-generated by Programs/_freeze_module.py */"
|
|
|
|
FROZEN_DATA_LINE = r"\s*(\d+,\s*)+\s*"
|
|
|
|
|
|
def is_frozen_header(source: str) -> bool:
|
|
return source.startswith((FROZEN_COMMENT_C, FROZEN_COMMENT_PY))
|
|
|
|
|
|
def decode_frozen_data(source: str) -> types.CodeType:
|
|
lines = source.splitlines()
|
|
while lines and re.match(FROZEN_DATA_LINE, lines[0]) is None:
|
|
del lines[0]
|
|
while lines and re.match(FROZEN_DATA_LINE, lines[-1]) is None:
|
|
del lines[-1]
|
|
values: Tuple[int, ...] = ast.literal_eval("".join(lines).strip())
|
|
data = bytes(values)
|
|
return umarshal.loads(data)
|
|
|
|
|
|
def generate(args: list[str], output: TextIO) -> None:
|
|
printer = Printer(output)
|
|
for arg in args:
|
|
file, modname = arg.rsplit(':', 1)
|
|
with open(file, "r", encoding="utf8") as fd:
|
|
source = fd.read()
|
|
if is_frozen_header(source):
|
|
code = decode_frozen_data(source)
|
|
else:
|
|
code = compile(fd.read(), f"<frozen {modname}>", "exec")
|
|
printer.generate_file(modname, code)
|
|
with printer.block(f"void\n_Py_Deepfreeze_Fini(void)"):
|
|
for p in printer.finis:
|
|
printer.write(p)
|
|
with printer.block(f"int\n_Py_Deepfreeze_Init(void)"):
|
|
for p in printer.inits:
|
|
with printer.block(f"if ({p} < 0)"):
|
|
printer.write("return -1;")
|
|
printer.write("return 0;")
|
|
printer.write(f"\nuint32_t _Py_next_func_version = {next_code_version};\n")
|
|
if verbose:
|
|
print(f"Cache hits: {printer.hits}, misses: {printer.misses}")
|
|
|
|
|
|
parser = argparse.ArgumentParser()
|
|
parser.add_argument("-o", "--output", help="Defaults to deepfreeze.c", default="deepfreeze.c")
|
|
parser.add_argument("-v", "--verbose", action="store_true", help="Print diagnostics")
|
|
parser.add_argument('args', nargs="+", help="Input file and module name (required) in file:modname format")
|
|
|
|
@contextlib.contextmanager
|
|
def report_time(label: str):
|
|
t0 = time.time()
|
|
try:
|
|
yield
|
|
finally:
|
|
t1 = time.time()
|
|
if verbose:
|
|
print(f"{label}: {t1-t0:.3f} sec")
|
|
|
|
|
|
def main() -> None:
|
|
global verbose
|
|
args = parser.parse_args()
|
|
verbose = args.verbose
|
|
output = args.output
|
|
with open(output, "w", encoding="utf-8") as file:
|
|
with report_time("generate"):
|
|
generate(args.args, file)
|
|
if verbose:
|
|
print(f"Wrote {os.path.getsize(output)} bytes to {output}")
|
|
|
|
|
|
if __name__ == "__main__":
|
|
main()
|