111 lines
2.5 KiB
Python
111 lines
2.5 KiB
Python
import sys
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try:
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sys.settrace
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except AttributeError:
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print("SKIP")
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raise SystemExit
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def print_stacktrace(frame, level=0):
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# Ignore CPython specific helpers.
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if frame.f_globals["__name__"].find("importlib") != -1:
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print_stacktrace(frame.f_back, level)
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return
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print(
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"%2d: %s@%s:%s => %s:%d"
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% (
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level,
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" ",
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frame.f_globals["__name__"],
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frame.f_code.co_name,
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# Keep just the filename.
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"sys_settrace_" + frame.f_code.co_filename.split("sys_settrace_")[-1],
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frame.f_lineno,
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)
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)
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if frame.f_back:
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print_stacktrace(frame.f_back, level + 1)
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class _Prof:
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trace_count = 0
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def trace_tick(self, frame, event, arg):
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self.trace_count += 1
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print_stacktrace(frame)
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__prof__ = _Prof()
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alice_handler_set = False
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def trace_tick_handler_alice(frame, event, arg):
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print("### trace_handler::Alice event:", event)
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__prof__.trace_tick(frame, event, arg)
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return trace_tick_handler_alice
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bob_handler_set = False
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def trace_tick_handler_bob(frame, event, arg):
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print("### trace_handler::Bob event:", event)
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__prof__.trace_tick(frame, event, arg)
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return trace_tick_handler_bob
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def trace_tick_handler(frame, event, arg):
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# Ignore CPython specific helpers.
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to_ignore = ["importlib", "zipimport", "encodings"]
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frame_name = frame.f_globals["__name__"]
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if any(name in frame_name for name in to_ignore):
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return
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print("### trace_handler::main event:", event)
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__prof__.trace_tick(frame, event, arg)
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if frame.f_code.co_name != "factorial":
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return trace_tick_handler
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global alice_handler_set
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if event == "call" and not alice_handler_set:
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alice_handler_set = True
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return trace_tick_handler_alice
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global bob_handler_set
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if event == "call" and not bob_handler_set:
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bob_handler_set = True
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return trace_tick_handler_bob
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return trace_tick_handler
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def factorial(n):
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if n == 0:
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return 1
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else:
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return n * factorial(n - 1)
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def do_tests():
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# These commands are here to demonstrate some execution being traced.
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print("Who loves the sun?")
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print("Not every-", factorial(3))
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from sys_settrace_subdir import sys_settrace_generic
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sys_settrace_generic.run_tests()
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return
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sys.settrace(trace_tick_handler)
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do_tests()
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sys.settrace(None)
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print("\n------------------ script exited ------------------")
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print("Total traces executed: ", __prof__.trace_count)
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