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1 import sys
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2 import time
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3 import threading
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4 import traceback
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5 import pydermonkey
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6
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7 rt = pydermonkey.Runtime()
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8 cx = rt.new_context()
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9 globalobj = cx.new_object()
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10 cx.init_standard_classes(globalobj)
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11
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12 def foo(cx, this, args):
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13 return cx.call_function(this, args[0], ())
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14
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15 cx.define_property(globalobj,
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16 'foo',
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17 cx.new_function(foo, 'foo'))
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18
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19 def jsprint(cx, this, args):
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20 if len(args) > 0:
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21 print args[0]
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22
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23 cx.define_property(globalobj,
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24 'print',
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25 cx.new_function(jsprint, 'print'))
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26
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27 def opcb(cx):
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28 # Don't do anything; if a keyboard interrupt was triggered,
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29 # it'll get raised here automatically.
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30 pass
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31
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32 cx.set_operation_callback(opcb)
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33
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34 class State(object):
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35 def __init__(self):
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36 self.curr_exc = None
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37 self.curr_tb = None
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38 self.curr_js_stack = None
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39
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40 state = State()
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41
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42 def throwhook(cx):
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43 curr_exc = cx.get_pending_exception()
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44 if state.curr_exc != curr_exc:
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45 state.curr_exc = curr_exc
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46 state.py_stack = traceback.extract_stack()
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47 state.js_stack = cx.get_stack()
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48
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49 cx.set_throw_hook(throwhook)
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50
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51 def watchdog():
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52 while 1:
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53 time.sleep(0.25)
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54 cx.trigger_operation_callback()
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55
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56 thread = threading.Thread(target=watchdog)
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57 thread.setDaemon(True)
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58 thread.start()
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59
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60 filename = 'test.js'
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61
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62 def make_stack(js_stack):
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63 lines = []
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64 while js_stack:
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65 if js_stack['script']:
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66 script = js_stack['script']
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67 thing = dict(filename = script.filename,
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68 lineno = js_stack['lineno'],
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69 name = '<module>')
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70 elif js_stack['function'] and not js_stack['function'].is_python:
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71 func = js_stack['function']
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72 thing = dict(filename = func.filename,
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73 lineno = js_stack['lineno'],
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74 name = func.name)
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75 else:
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76 thing = None
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77 if thing:
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78 lines.insert(0, " File \"%(filename)s\", line %(lineno)d, in %(name)s" % thing)
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79 js_stack = js_stack['caller']
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80 lines.insert(0, "Traceback (most recent call last):")
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81 return '\n'.join(lines)
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82
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83 try:
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84 cx.evaluate_script(globalobj, open(filename).read(), filename, 1)
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85 except pydermonkey.error, e:
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86 print make_stack(state.js_stack)
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87 print e.args[1]
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