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import sys
from rpython.rlib.objectmodel import we_are_translated
# RPython raises StackOverflow instead of just RuntimeError when running
# out of C stack. We need some hacks to support "except StackOverflow:"
# in untranslated code too. This StackOverflow has a strange shape in
# order to be special-cased by the flow object space (it is replaced by
# the class StackOverflow).
class StackOverflow(RuntimeError):
"""Out of C stack."""
# rename the variable, but the name of the class is still StackOverflow
_StackOverflow = StackOverflow
# replace StackOverflow with this, which works in untranslated code too
StackOverflow = ((RuntimeError, RuntimeError),)
def check_stack_overflow():
if we_are_translated():
return
# before translation, an "except StackOverflow" includes all RuntimeErrors,
# including NotImplementedError. Special-case them.
e, v, _ = sys.exc_info()
if e is not RuntimeError or 'recursion' not in str(v):
raise
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