Mercurial > cpython-lru_cache-weakref

annotate Python/makeopcodetargets.py @ 69888:8752a81ada2d

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faulthandler: dump all threads by default * Set the default value of all_threads arguments to True * Py_FatalError() dumps all threads, instead of only the current thread Dump only the current thread is not reliable. In some cases, Python is unable to retrieve the state of the current thread and so is unable to dump the traceback. faulthandler keeps a reference to the interpreter and so is always able to dump the traceback of all threads.
author Victor Stinner <victor.stinner@haypocalc.com>
date Sat, 07 May 2011 12:43:00 +0200
parents 3c9232a684ae
children d30b54ffd5e8
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 #! /usr/bin/env python
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2 """Generate C code for the jump table of the threaded code interpreter
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3 (for compilers supporting computed gotos or "labels-as-values", such as gcc).
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4 """
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5
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6 # This code should stay compatible with Python 2.3, at least while
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7 # some of the buildbots have Python 2.3 as their system Python.
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8
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9 import imp
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10 import os
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11
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12
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13 def find_module(modname):
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14 """Finds and returns a module in the local dist/checkout.
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15 """
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16 modpath = os.path.join(
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17 os.path.dirname(os.path.dirname(__file__)), "Lib")
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18 return imp.load_module(modname, *imp.find_module(modname, [modpath]))
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19
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20 def write_contents(f):
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21 """Write C code contents to the target file object.
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22 """
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23 opcode = find_module("opcode")
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24 targets = ['_unknown_opcode'] * 256
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25 for opname, op in opcode.opmap.items():
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26 if opname == "STOP_CODE":
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27 # XXX opcode not implemented
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28 continue
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29 targets[op] = "TARGET_%s" % opname
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30 f.write("static void *opcode_targets[256] = {\n")
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31 f.write(",\n".join([" &&%s" % s for s in targets]))
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32 f.write("\n};\n")
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33
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34
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35 if __name__ == "__main__":
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36 import sys
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37 assert len(sys.argv) < 3, "Too many arguments"
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38 if len(sys.argv) == 2:
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39 target = sys.argv[1]
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40 else:
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41 target = "Python/opcode_targets.h"
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42 f = open(target, "w")
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43 try:
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44 write_contents(f)
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45 finally:
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46 f.close()