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ffa55d21b4
Add the "regen-frozen" makefile target that regenerates the code for the frozen __hello__ module.
51 lines
1.2 KiB
Python
51 lines
1.2 KiB
Python
#!/usr/bin/env python3
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import sys
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import os
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import marshal
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DIR = os.path.dirname(sys.argv[0])
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# source code for module to freeze
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FILE = os.path.join(DIR, 'flag.py')
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# C symbol to use for array holding frozen bytes
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SYMBOL = 'M___hello__'
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def get_module_code(filename):
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"""Compile 'filename' and return the module code as a marshalled byte
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string.
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"""
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with open(filename, 'r') as fp:
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src = fp.read()
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co = compile(src, 'none', 'exec')
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co_bytes = marshal.dumps(co)
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return co_bytes
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def gen_c_code(fp, co_bytes):
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"""Generate C code for the module code in 'co_bytes', write it to 'fp'.
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"""
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def write(*args, **kwargs):
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print(*args, **kwargs, file=fp)
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write('/* Generated with Tools/freeze/regen_frozen.py */')
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write('static unsigned char %s[] = {' % SYMBOL, end='')
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bytes_per_row = 13
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for i, opcode in enumerate(co_bytes):
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if (i % bytes_per_row) == 0:
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# start a new row
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write()
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write(' ', end='')
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write('%d,' % opcode, end='')
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write()
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write('};')
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def main():
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out_filename = sys.argv[1]
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co_bytes = get_module_code(FILE)
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with open(out_filename, 'w') as fp:
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gen_c_code(fp, co_bytes)
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if __name__ == '__main__':
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main()
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