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ca9dbc7d88
Issue #20021: use importlib.machinery to import Lib/opcode.py and not an opcode module coming from somewhere else. makeopcodetargets.py is part of the Python build process and it is run by an external Python program, not the built Python program. Patch written by Serhiy Storchaka.
56 lines
1.6 KiB
Python
Executable File
56 lines
1.6 KiB
Python
Executable File
#! /usr/bin/env python
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"""Generate C code for the jump table of the threaded code interpreter
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(for compilers supporting computed gotos or "labels-as-values", such as gcc).
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"""
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import os
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import sys
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try:
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from importlib.machinery import SourceFileLoader
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except ImportError:
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import imp
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def find_module(modname):
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"""Finds and returns a module in the local dist/checkout.
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"""
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modpath = os.path.join(
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os.path.dirname(os.path.dirname(__file__)), "Lib")
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return imp.load_module(modname, *imp.find_module(modname, [modpath]))
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else:
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def find_module(modname):
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"""Finds and returns a module in the local dist/checkout.
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"""
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modpath = os.path.join(
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os.path.dirname(os.path.dirname(__file__)), "Lib", modname + ".py")
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return SourceFileLoader(modname, modpath).load_module()
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def write_contents(f):
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"""Write C code contents to the target file object.
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"""
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opcode = find_module('opcode')
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targets = ['_unknown_opcode'] * 256
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for opname, op in opcode.opmap.items():
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targets[op] = "TARGET_%s" % opname
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f.write("static void *opcode_targets[256] = {\n")
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f.write(",\n".join([" &&%s" % s for s in targets]))
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f.write("\n};\n")
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def main():
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if len(sys.argv) >= 3:
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sys.exit("Too many arguments")
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if len(sys.argv) == 2:
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target = sys.argv[1]
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else:
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target = "Python/opcode_targets.h"
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with open(target, "w") as f:
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write_contents(f)
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print("Jump table written into %s" % target)
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if __name__ == "__main__":
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main()
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