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