forked from benfred/py-spy
-
Notifications
You must be signed in to change notification settings - Fork 0
/
generate_bindings.py
209 lines (175 loc) · 8.49 KB
/
generate_bindings.py
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
""" Scripts to generate bindings of different python interpreter versions
Requires bindgen to be installed (cargo install bindgen), and probably needs a nightly
compiler with rustfmt-nightly.
Also requires a git repo of cpython to be checked out somewhere. As a hack, this can
also build different versions of cpython for testing out
"""
import argparse
import os
import sys
import tempfile
def build_python(cpython_path, version):
# TODO: probably easier to use pyenv for this?
print("Compiling python %s from repo at %s" % (version, cpython_path))
install_path = os.path.join(cpython_path, version)
ret = os.system(f"""
cd {cpython_path}
git checkout {version}
# build in a subdirectory
mkdir -p build_{version}
cd build_{version}
../configure prefix={install_path}
make
make install
""")
if ret:
return ret
# also install setuptools_rust/wheel here for building packages
pip = os.path.join(install_path, "bin", "pip3" if version.startswith("v3") else "pip")
return os.system(f"{pip} install setuptools_rust wheel")
def calculate_pyruntime_offsets(cpython_path, version, configure=False):
ret = os.system(f"""cd {cpython_path} && git checkout {version}""")
if ret:
return ret
if configure:
os.system(f"cd {cpython_path} && ./configure prefix=" + os.path.join(cpython_path, version))
# simple little c program to get the offsets we need from the pyruntime struct
# (using rust bindgen here is more complicated than necessary)
program = r"""
#include <stddef.h>
#include <stdio.h>
#define Py_BUILD_CORE 1
#include "Include/Python.h"
#include "Include/internal/pystate.h"
int main(int argc, const char * argv[]) {
size_t interp_head = offsetof(_PyRuntimeState, interpreters.head);
printf("pub static INTERP_HEAD_OFFSET: usize = %i;\n", interp_head);
size_t tstate_current = offsetof(_PyRuntimeState, gilstate.tstate_current);
printf("pub static TSTATE_CURRENT: usize = %i;\n", tstate_current);
}
"""
if not os.path.isfile(os.path.join(cpython_path, "Include", "internal", "pystate.h")):
if os.path.isfile(os.path.join(cpython_path, "Include", "internal", "pycore_pystate.h")):
program = program.replace("pystate.h", "pycore_pystate.h")
else:
print("failed to find Include/internal/pystate.h in cpython directory =(")
return
with tempfile.TemporaryDirectory() as path:
if sys.platform.startswith("win"):
source_filename = os.path.join(path, "pyruntime_offsets.cpp")
exe = os.path.join("pyruntime_offsets.exe")
else:
source_filename = os.path.join(path, "pyruntime_offsets.c")
exe = os.path.join(path, "pyruntime_offsets")
with open(source_filename, "w") as o:
o.write(program)
if sys.platform.startswith("win"):
# this requires a 'x64 Native Tools Command Prompt' to work out properly for 64 bit installs
# also expects that you have run something like 'PCBuild\build.bat' first
ret = os.system(f"cl {source_filename} /I {cpython_path} /I {cpython_path}\PC /I {cpython_path}\Include")
elif sys.platform.startswith("freebsd"):
ret = os.system(f"""cc {source_filename} -I {cpython_path} -I {cpython_path}/Include -o {exe}""")
else:
ret = os.system(f"""gcc {source_filename} -I {cpython_path} -I {cpython_path}/Include -o {exe}""")
if ret:
print("Failed to compile""")
return ret
ret = os.system(exe)
if ret:
print("Failed to run pyruntime file")
return ret
def extract_bindings(cpython_path, version, configure=False):
print("Generating bindings for python %s from repo at %s" % (version, cpython_path))
ret = os.system(f"""
cd {cpython_path}
git checkout {version}
# need to run configure on the current branch to generate pyconfig.h sometimes
{("./configure prefix=" + os.path.join(cpython_path, version)) if configure else ""}
cat Include/Python.h > bindgen_input.h
cat Include/frameobject.h >> bindgen_input.h
cat Objects/dict-common.h >> bindgen_input.h
echo '#define Py_BUILD_CORE 1\n' >> bindgen_input.h
cat Include/internal/pycore_pystate.h >> bindgen_input.h
bindgen bindgen_input.h -o bindgen_output.rs \
--with-derive-default \
--no-layout-tests --no-doc-comments \
--whitelist-type PyInterpreterState \
--whitelist-type PyFrameObject \
--whitelist-type PyThreadState \
--whitelist-type PyCodeObject \
--whitelist-type PyVarObject \
--whitelist-type PyBytesObject \
--whitelist-type PyASCIIObject \
--whitelist-type PyUnicodeObject \
--whitelist-type PyCompactUnicodeObject \
--whitelist-type PyStringObject \
--whitelist-type PyTupleObject \
--whitelist-type PyListObject \
--whitelist-type PyIntObject \
--whitelist-type PyLongObject \
--whitelist-type PyFloatObject \
--whitelist-type PyDictObject \
--whitelist-type PyDictKeysObject \
--whitelist-type PyDictKeyEntry \
--whitelist-type PyObject \
--whitelist-type PyTypeObject \
-- -I . -I ./Include -I ./Include/internal
""")
if ret:
return ret
# write the file out to the appropiate place, disabling some warnings
with open(os.path.join("src", "python_bindings", version.replace(".", "_") + ".rs"), "w") as o:
o.write(f"// Generated bindings for python {version}\n")
o.write("#![allow(dead_code)]\n")
o.write("#![allow(non_upper_case_globals)]\n")
o.write("#![allow(non_camel_case_types)]\n")
o.write("#![allow(non_snake_case)]\n")
o.write("#![allow(clippy::useless_transmute)]\n")
o.write("#![allow(clippy::default_trait_access)]\n")
o.write("#![allow(clippy::cast_lossless)]\n")
o.write("#![allow(clippy::trivially_copy_pass_by_ref)]\n\n")
o.write(open(os.path.join(cpython_path, "bindgen_output.rs")).read())
if __name__ == "__main__":
if sys.platform.startswith("win"):
default_cpython_path = os.path.join(os.getenv("userprofile"), "code", "cpython")
else:
default_cpython_path = os.path.join(os.getenv("HOME"), "code", "cpython")
parser = argparse.ArgumentParser(description="runs bindgen on cpython version",
formatter_class=argparse.ArgumentDefaultsHelpFormatter)
parser.add_argument("--cpython", type=str, default=default_cpython_path,
dest="cpython", help="path to cpython repo")
parser.add_argument("--configure",
help="Run configure script prior to generating bindings",
action="store_true")
parser.add_argument("--pyruntime",
help="generate offsets for pyruntime",
action="store_true")
parser.add_argument("--build",
help="Build python for this version",
action="store_true")
parser.add_argument("--all",
help="Build all versions",
action="store_true")
parser.add_argument("versions", type=str, nargs='*', help='versions to extract')
args = parser.parse_args()
if not os.path.isdir(args.cpython):
print(f"Directory '{args.cpython}' doesn't exist!")
print("Pass a valid cpython path in with --cpython <pathname>")
sys.exit(1)
if args.all:
versions = ['v3.8.0b4', 'v3.7.0', 'v3.6.6', 'v3.5.5', 'v3.4.8', 'v3.3.7', 'v3.2.6', 'v2.7.15']
else:
versions = args.versions
if not versions:
print("You must specify versions of cpython to generate bindings for, or --all\n")
parser.print_help()
for version in versions:
if args.build:
# todo: this probably should be a separate script
if build_python(args.cpython, version):
print("Failed to build python")
elif args.pyruntime:
calculate_pyruntime_offsets(args.cpython, version, configure=args.configure)
else:
if extract_bindings(args.cpython, version, configure=args.configure):
print("Failed to generate bindings")