forked from Lephenixnoir/PythonExtra
86 lines
2.7 KiB
Python
86 lines
2.7 KiB
Python
# test some extreme cases of allocating exceptions and tracebacks
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import micropython
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# Check for stackless build, which can't call functions without
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# allocating a frame on the heap.
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try:
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def stackless(): pass
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micropython.heap_lock(); stackless(); micropython.heap_unlock()
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except RuntimeError:
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print("SKIP")
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raise SystemExit
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# some ports need to allocate heap for the emergency exception
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try:
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micropython.alloc_emergency_exception_buf(256)
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except AttributeError:
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pass
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def main():
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# create an exception with many args while heap is locked
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# should revert to empty tuple for args
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micropython.heap_lock()
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e = Exception(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0)
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micropython.heap_unlock()
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print(repr(e))
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# create an exception with a long formatted error message while heap is locked
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# should use emergency exception buffer and truncate the message
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def f():
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pass
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micropython.heap_lock()
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try:
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f(abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz=1)
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except Exception as er:
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e = er
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micropython.heap_unlock()
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print(repr(e)[:10])
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# create an exception with a long formatted error message while heap is low
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# should use the heap and truncate the message
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lst = []
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while 1:
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try:
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lst = [lst]
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except MemoryError:
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break
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try:
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f(abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz=1)
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except Exception as er:
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e = er
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lst[0] = None
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lst = None
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print(repr(e)[:10])
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# raise a deep exception with the heap locked
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# should use emergency exception and be unable to resize traceback array
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def g():
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g()
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micropython.heap_lock()
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try:
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g()
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except Exception as er:
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e = er
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micropython.heap_unlock()
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print(repr(e)[:13])
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# create an exception on the heap with some traceback on the heap, but then
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# raise it with the heap locked so it can't allocate any more traceback
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exc = Exception('my exception')
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try:
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raise exc
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except:
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pass
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def h(e):
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raise e
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micropython.heap_lock()
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try:
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h(exc)
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except Exception as er:
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e = er
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micropython.heap_unlock()
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print(repr(e))
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main()
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