1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
|
import contextlib
import io
import os.path
import re
SCRIPT_NAME = 'Tools/build/generate_global_objects.py'
__file__ = os.path.abspath(__file__)
ROOT = os.path.dirname(os.path.dirname(os.path.dirname(__file__)))
INTERNAL = os.path.join(ROOT, 'Include', 'internal')
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
'NAME', # Objects/typeobject.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__',
'__aiter__',
'__and__',
'__anext__',
'__await__',
'__bool__',
'__call__',
'__contains__',
'__del__',
'__delattr__',
'__delete__',
'__delitem__',
'__eq__',
'__float__',
'__floordiv__',
'__ge__',
'__get__',
'__getattr__',
'__getattribute__',
'__getitem__',
'__gt__',
'__hash__',
'__iadd__',
'__iand__',
'__ifloordiv__',
'__ilshift__',
'__imatmul__',
'__imod__',
'__imul__',
'__index__',
'__init__',
'__int__',
'__invert__',
'__ior__',
'__ipow__',
'__irshift__',
'__isub__',
'__iter__',
'__itruediv__',
'__ixor__',
'__le__',
'__len__',
'__lshift__',
'__lt__',
'__matmul__',
'__mod__',
'__mul__',
'__ne__',
'__neg__',
'__new__',
'__next__',
'__or__',
'__pos__',
'__pow__',
'__radd__',
'__rand__',
'__repr__',
'__rfloordiv__',
'__rlshift__',
'__rmatmul__',
'__rmod__',
'__rmul__',
'__ror__',
'__rpow__',
'__rrshift__',
'__rshift__',
'__rsub__',
'__rtruediv__',
'__rxor__',
'__set__',
'__setattr__',
'__setitem__',
'__str__',
'__sub__',
'__truediv__',
'__xor__',
'__divmod__',
'__rdivmod__',
'__buffer__',
'__release_buffer__',
#Workarounds for GH-108918
'alias',
'args',
'exc_type',
'exc_value',
'self',
'traceback',
]
NON_GENERATED_IMMORTAL_OBJECTS = [
# The generated ones come from generate_runtime_init().
'(PyObject *)&_Py_SINGLETON(bytes_empty)',
'(PyObject *)&_Py_SINGLETON(tuple_empty)',
'(PyObject *)&_Py_SINGLETON(hamt_bitmap_node_empty)',
'(PyObject *)&_Py_INTERP_SINGLETON(interp, hamt_empty)',
'(PyObject *)&_Py_SINGLETON(context_token_missing)',
]
#######################################
# helpers
def iter_files():
for name in ('Modules', 'Objects', 'Parser', 'PC', 'Programs', 'Python'):
root = os.path.join(ROOT, name)
for dirname, _, files in os.walk(root):
for name in files:
if not name.endswith(('.c', '.h')):
continue
yield os.path.join(dirname, name)
def iter_global_strings():
id_regex = re.compile(r'\b_Py_ID\((\w+)\)')
str_regex = re.compile(r'\b_Py_DECLARE_STR\((\w+), "(.*?)"\)')
for filename in iter_files():
try:
infile = open(filename, encoding='utf-8')
except FileNotFoundError:
# The file must have been a temporary file.
continue
with 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)
@contextlib.contextmanager
def open_for_changes(filename, orig):
"""Like open() but only write to the file if it changed."""
outfile = io.StringIO()
yield outfile
text = outfile.getvalue()
if text != orig:
with open(filename, 'w', encoding='utf-8') as outfile:
outfile.write(text)
else:
print(f'# not changed: {filename}')
#######################################
# the global objects
START = f'/* The following is auto-generated by {SCRIPT_NAME}. */'
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:
orig = infile.read()
lines = iter(orig.rstrip().splitlines())
before = '\n'.join(iter_to_marker(lines, START))
for _ in iter_to_marker(lines, END):
pass
after = '\n'.join(lines)
# Generate the file.
with open_for_changes(filename, orig) as outfile:
printer = Printer(outfile)
printer.write(before)
printer.write(START)
with printer.block('struct _Py_global_strings', ';'):
with printer.block('struct', ' literals;'):
for literal, name in sorted(strings.items(), key=lambda x: x[1]):
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})')
with printer.block('struct', ' ascii[128];'):
printer.write("PyASCIIObject _ascii;")
printer.write("uint8_t _data[2];")
with printer.block('struct', ' latin1[128];'):
printer.write("PyCompactUnicodeObject _latin1;")
printer.write("uint8_t _data[2];")
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_generated.h')
# Read the non-generated part of the file.
with open(filename) as infile:
orig = infile.read()
lines = iter(orig.rstrip().splitlines())
before = '\n'.join(iter_to_marker(lines, START))
for _ in iter_to_marker(lines, END):
pass
after = '\n'.join(lines)
# Generate the file.
with open_for_changes(filename, orig) as outfile:
immortal_objects = []
printer = Printer(outfile)
printer.write(before)
printer.write(START)
with printer.block('#define _Py_small_ints_INIT', continuation=True):
for i in range(-nsmallnegints, nsmallposints):
printer.write(f'_PyLong_DIGIT_INIT({i}),')
immortal_objects.append(f'(PyObject *)&_Py_SINGLETON(small_ints)[_PY_NSMALLNEGINTS + {i}]')
printer.write('')
with printer.block('#define _Py_bytes_characters_INIT', continuation=True):
for i in range(256):
printer.write(f'_PyBytes_CHAR_INIT({i}),')
immortal_objects.append(f'(PyObject *)&_Py_SINGLETON(bytes_characters)[{i}]')
printer.write('')
with printer.block('#define _Py_str_literals_INIT', continuation=True):
for literal, name in sorted(strings.items(), key=lambda x: x[1]):
printer.write(f'INIT_STR({name}, "{literal}"),')
immortal_objects.append(f'(PyObject *)&_Py_STR({name})')
printer.write('')
with printer.block('#define _Py_str_identifiers_INIT', continuation=True):
for name in sorted(identifiers):
assert name.isidentifier(), name
printer.write(f'INIT_ID({name}),')
immortal_objects.append(f'(PyObject *)&_Py_ID({name})')
printer.write('')
with printer.block('#define _Py_str_ascii_INIT', continuation=True):
for i in range(128):
printer.write(f'_PyASCIIObject_INIT("\\x{i:02x}"),')
immortal_objects.append(f'(PyObject *)&_Py_SINGLETON(strings).ascii[{i}]')
printer.write('')
with printer.block('#define _Py_str_latin1_INIT', continuation=True):
for i in range(128, 256):
utf8 = ['"']
for c in chr(i).encode('utf-8'):
utf8.append(f"\\x{c:02x}")
utf8.append('"')
printer.write(f'_PyUnicode_LATIN1_INIT("\\x{i:02x}", {"".join(utf8)}),')
immortal_objects.append(f'(PyObject *)&_Py_SINGLETON(strings).latin1[{i} - 128]')
printer.write(END)
printer.write(after)
return immortal_objects
def generate_static_strings_initializer(identifiers, strings):
# Target the runtime initializer.
filename = os.path.join(INTERNAL, 'pycore_unicodeobject_generated.h')
# Read the non-generated part of the file.
with open(filename) as infile:
orig = infile.read()
lines = iter(orig.rstrip().splitlines())
before = '\n'.join(iter_to_marker(lines, START))
for _ in iter_to_marker(lines, END):
pass
after = '\n'.join(lines)
# Generate the file.
with open_for_changes(filename, orig) as outfile:
printer = Printer(outfile)
printer.write(before)
printer.write(START)
printer.write("static inline void")
with printer.block("_PyUnicode_InitStaticStrings(PyInterpreterState *interp)"):
printer.write(f'PyObject *string;')
for i in sorted(identifiers):
# This use of _Py_ID() is ignored by iter_global_strings()
# since iter_files() ignores .h files.
printer.write(f'string = &_Py_ID({i});')
printer.write(f'_PyUnicode_InternStatic(interp, &string);')
printer.write(f'assert(_PyUnicode_CheckConsistency(string, 1));')
printer.write(f'assert(PyUnicode_GET_LENGTH(string) != 1);')
for value, name in sorted(strings.items()):
printer.write(f'string = &_Py_STR({name});')
printer.write(f'_PyUnicode_InternStatic(interp, &string);')
printer.write(f'assert(_PyUnicode_CheckConsistency(string, 1));')
printer.write(f'assert(PyUnicode_GET_LENGTH(string) != 1);')
printer.write(END)
printer.write(after)
def generate_global_object_finalizers(generated_immortal_objects):
# Target the runtime initializer.
filename = os.path.join(INTERNAL, 'pycore_global_objects_fini_generated.h')
# Read the non-generated part of the file.
with open(filename) as infile:
orig = infile.read()
lines = iter(orig.rstrip().splitlines())
before = '\n'.join(iter_to_marker(lines, START))
for _ in iter_to_marker(lines, END):
pass
after = '\n'.join(lines)
# Generate the file.
with open_for_changes(filename, orig) as outfile:
printer = Printer(outfile)
printer.write(before)
printer.write(START)
printer.write('#ifdef Py_DEBUG')
printer.write("static inline void")
with printer.block(
"_PyStaticObjects_CheckRefcnt(PyInterpreterState *interp)"):
printer.write('/* generated runtime-global */')
printer.write('// (see pycore_runtime_init_generated.h)')
for ref in generated_immortal_objects:
printer.write(f'_PyStaticObject_CheckRefcnt({ref});')
printer.write('/* non-generated */')
for ref in NON_GENERATED_IMMORTAL_OBJECTS:
printer.write(f'_PyStaticObject_CheckRefcnt({ref});')
printer.write('#endif // Py_DEBUG')
printer.write(END)
printer.write(after)
def get_identifiers_and_strings() -> 'tuple[set[str], dict[str, str]]':
identifiers = set(IDENTIFIERS)
strings = {}
# Note that we store strings as they appear in C source, so the checks here
# can be defeated, e.g.:
# - "a" and "\0x61" won't be reported as duplicate.
# - "\n" appears as 2 characters.
# Probably not worth adding a C string parser.
for name, string, *_ in iter_global_strings():
if string is None:
if name not in IGNORED:
identifiers.add(name)
else:
if len(string) == 1 and ord(string) < 256:
# Give a nice message for common mistakes.
# To cover tricky cases (like "\n") we also generate C asserts.
raise ValueError(
'do not use &_PyID or &_Py_STR for one-character latin-1 '
+ f'strings, use _Py_LATIN1_CHR instead: {string!r}')
if string not in strings:
strings[string] = name
elif name != strings[string]:
raise ValueError(f'string mismatch for {name!r} ({string!r} != {strings[name]!r}')
overlap = identifiers & set(strings.keys())
if overlap:
raise ValueError(
'do not use both _PyID and _Py_DECLARE_STR for the same string: '
+ repr(overlap))
return identifiers, strings
#######################################
# the script
def main() -> None:
identifiers, strings = get_identifiers_and_strings()
generate_global_strings(identifiers, strings)
generated_immortal_objects = generate_runtime_init(identifiers, strings)
generate_static_strings_initializer(identifiers, strings)
generate_global_object_finalizers(generated_immortal_objects)
if __name__ == '__main__':
main()
|