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"""
Implementation of the 'sys._current_frames()' routine.
"""
def _current_frames(space):
"""_current_frames() -> dictionary
Return a dictionary mapping each current thread T's thread id to T's
current stack frame. Functions in the traceback module can build the
call stack given such a frame.
Note that in PyPy with the JIT, calling this function causes a runtime
penalty in all threads, depending on the internal JIT state. In each
thread, the penalty should only be noticeable if this call was done
while in the middle of a long-running function.
This function should be used for specialized purposes only."""
w_result = space.newdict()
ecs = space.threadlocals.getallvalues()
for thread_ident, ec in ecs.items():
w_topframe = ec.gettopframe_nohidden()
if w_topframe is None:
continue
space.setitem(w_result,
space.newint(thread_ident),
w_topframe)
return w_result
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