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Copy pathgenerate_global_objects.py
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279 lines (242 loc) · 8.17 KB
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import contextlib
import glob
import os.path
import re
import sys
__file__ = os.path.abspath(__file__)
ROOT = os.path.dirname(os.path.dirname(os.path.dirname(__file__)))
INTERNAL = os.path.join(ROOT, 'Include', 'internal')
STRING_LITERALS = {
'empty': '',
'dot': '.',
}
IGNORED = {
'ACTION', # Python/_warnings.c
'ATTR', # Python/_warnings.c and Objects/funcobject.c
'DUNDER', # Objects/typeobject.c
'RDUNDER', # Objects/typeobject.c
'SPECIAL', # Objects/weakrefobject.c
}
IDENTIFIERS = [
# from ADD() Python/_warnings.c
'default',
'ignore',
# from GET_WARNINGS_ATTR() in Python/_warnings.c
'WarningMessage',
'_showwarnmsg',
'_warn_unawaited_coroutine',
'defaultaction',
'filters',
'onceregistry',
# from WRAP_METHOD() in Objects/weakrefobject.c
'__bytes__',
'__reversed__',
# from COPY_ATTR() in Objects/funcobject.c
'__module__',
'__name__',
'__qualname__',
'__doc__',
'__annotations__',
# from SLOT* in Objects/typeobject.c
'__abs__',
'__add__',
'__and__',
'__divmod__',
'__float__',
'__floordiv__',
'__getitem__',
'__iadd__',
'__iand__',
'__ifloordiv__',
'__ilshift__',
'__imatmul__',
'__imod__',
'__imul__',
'__int__',
'__invert__',
'__ior__',
'__irshift__',
'__isub__',
'__itruediv__',
'__ixor__',
'__lshift__',
'__matmul__',
'__mod__',
'__mul__',
'__neg__',
'__or__',
'__pos__',
'__pow__',
'__radd__',
'__rand__',
'__rdivmod__',
'__rfloordiv__',
'__rlshift__',
'__rmatmul__',
'__rmod__',
'__rmul__',
'__ror__',
'__rpow__',
'__rrshift__',
'__rshift__',
'__rsub__',
'__rtruediv__',
'__rxor__',
'__str__',
'__sub__',
'__truediv__',
'__xor__',
]
#######################################
# helpers
def iter_global_strings():
id_regex = re.compile(r'\b_Py_ID\((\w+)\)')
str_regex = re.compile(r'\b_Py_DECLARE_STR\((\w+), "(.*?)"\)')
for dirname, _, files in os.walk(ROOT):
if os.path.relpath(dirname, ROOT).startswith('Include'):
continue
for name in files:
if not name.endswith(('.c', '.h')):
continue
filename = os.path.join(dirname, name)
with open(os.path.join(filename), encoding='utf-8') as infile:
for lno, line in enumerate(infile, 1):
for m in id_regex.finditer(line):
identifier, = m.groups()
yield identifier, None, filename, lno, line
for m in str_regex.finditer(line):
varname, string = m.groups()
yield varname, string, filename, lno, line
def iter_to_marker(lines, marker):
for line in lines:
if line.rstrip() == marker:
break
yield line
class Printer:
def __init__(self, file):
self.level = 0
self.file = file
self.continuation = [False]
@contextlib.contextmanager
def indent(self):
save_level = self.level
try:
self.level += 1
yield
finally:
self.level = save_level
def write(self, arg):
eol = '\n'
if self.continuation[-1]:
eol = f' \\{eol}' if arg else f'\\{eol}'
self.file.writelines((" "*self.level, arg, eol))
@contextlib.contextmanager
def block(self, prefix, suffix="", *, continuation=None):
if continuation is None:
continuation = self.continuation[-1]
self.continuation.append(continuation)
self.write(prefix + " {")
with self.indent():
yield
self.continuation.pop()
self.write("}" + suffix)
#######################################
# the global objects
START = '/* The following is auto-generated by Tools/scripts/generate_global_objects.py. */'
END = '/* End auto-generated code */'
def generate_global_strings(identifiers, strings):
filename = os.path.join(INTERNAL, 'pycore_global_strings.h')
# Read the non-generated part of the file.
with open(filename) as infile:
before = ''.join(iter_to_marker(infile, START))[:-1]
for _ in iter_to_marker(infile, END):
pass
after = infile.read()[:-1]
# Generate the file.
with open(filename, 'w', encoding='utf-8') as outfile:
printer = Printer(outfile)
printer.write(before)
printer.write(START)
with printer.block('struct _Py_global_strings', ';'):
with printer.block('struct', ' literals;'):
for name, literal in sorted(strings.items()):
printer.write(f'STRUCT_FOR_STR({name}, "{literal}")')
outfile.write('\n')
with printer.block('struct', ' identifiers;'):
for name in sorted(identifiers):
assert name.isidentifier(), name
printer.write(f'STRUCT_FOR_ID({name})')
printer.write(END)
printer.write(after)
def generate_runtime_init(identifiers, strings):
# First get some info from the declarations.
nsmallposints = None
nsmallnegints = None
with open(os.path.join(INTERNAL, 'pycore_global_objects.h')) as infile:
for line in infile:
if line.startswith('#define _PY_NSMALLPOSINTS'):
nsmallposints = int(line.split()[-1])
elif line.startswith('#define _PY_NSMALLNEGINTS'):
nsmallnegints = int(line.split()[-1])
break
else:
raise NotImplementedError
assert nsmallposints and nsmallnegints
# Then target the runtime initializer.
filename = os.path.join(INTERNAL, 'pycore_runtime_init.h')
# Read the non-generated part of the file.
with open(filename) as infile:
before = ''.join(iter_to_marker(infile, START))[:-1]
for _ in iter_to_marker(infile, END):
pass
after = infile.read()[:-1]
# Generate the file.
with open(filename, 'w', encoding='utf-8') as outfile:
printer = Printer(outfile)
printer.write(before)
printer.write(START)
with printer.block('#define _Py_global_objects_INIT', continuation=True):
with printer.block('.singletons =', ','):
# Global int objects.
with printer.block('.small_ints =', ','):
for i in range(-nsmallnegints, nsmallposints):
printer.write(f'_PyLong_DIGIT_INIT({i}),')
printer.write('')
# Global bytes objects.
printer.write('.bytes_empty = _PyBytes_SIMPLE_INIT(0, 0),')
with printer.block('.bytes_characters =', ','):
for i in range(256):
printer.write(f'_PyBytes_CHAR_INIT({i}),')
printer.write('')
# Global strings.
with printer.block('.strings =', ','):
with printer.block('.literals =', ','):
for name, literal in sorted(strings.items()):
printer.write(f'INIT_STR({name}, "{literal}"),')
with printer.block('.identifiers =', ','):
for name in sorted(identifiers):
assert name.isidentifier(), name
printer.write(f'INIT_ID({name}),')
printer.write(END)
printer.write(after)
#######################################
# the script
def main() -> None:
identifiers = set(IDENTIFIERS)
strings = dict(STRING_LITERALS)
for name, string, filename, lno, _ in iter_global_strings():
if string is None:
if name not in IGNORED:
identifiers.add(name)
else:
if name not in strings:
strings[name] = string
elif string != strings[name]:
raise ValueError(f'string mismatch for {name!r} ({string!r} != {strings[name]!r}')
generate_global_strings(identifiers, strings)
generate_runtime_init(identifiers, strings)
if __name__ == '__main__':
import argparse
parser = argparse.ArgumentParser()
args = parser.parse_args()
main(**vars(args))