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from rpython.translator.backendopt import graphanalyze
# This is not an optimization. It checks for possible releases of the
# GIL in all graphs starting from rgc.no_release_gil.
class GilAnalyzer(graphanalyze.BoolGraphAnalyzer):
def analyze_direct_call(self, graph, seen=None):
try:
func = graph.func
except AttributeError:
pass
else:
if getattr(func, '_gctransformer_hint_close_stack_', False):
return True
if getattr(func, '_transaction_break_', False):
return True
return graphanalyze.BoolGraphAnalyzer.analyze_direct_call(
self, graph, seen)
def analyze_external_call(self, op, seen=None):
return False
def analyze_simple_operation(self, op, graphinfo):
return False
def analyze(graphs, translator):
gilanalyzer = GilAnalyzer(translator)
for graph in graphs:
func = getattr(graph, 'func', None)
if func and getattr(func, '_no_release_gil_', False):
if gilanalyzer.analyze_direct_call(graph):
# 'no_release_gil' function can release the gil
import cStringIO
err = cStringIO.StringIO()
import sys
prev = sys.stdout
try:
sys.stdout = err
ca = GilAnalyzer(translator)
ca.verbose = True
ca.analyze_direct_call(graph) # print the "traceback" here
sys.stdout = prev
except:
sys.stdout = prev
# ^^^ for the dump of which operation in which graph actually
# causes it to return True
raise Exception("'no_release_gil' function can release the GIL:"
" %s\n%s" % (func, err.getvalue()))
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