kc3-lang/libxml2/python/tests/xpathleak.py

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• Hash : 729601f1
  Author :
  Date : 2009-10-12T22:42:26
  

  Fix memory leak in xmlXPathEvalExpression()
  
  * xpath.c: plug some leaks when parsing misformed XPath expressions
  * python/tests/xpathleak.py: expand the regression tests for those
  

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• python/tests/xpathleak.py

• #!/usr/bin/python
  import sys, libxml2
  
  libxml2.debugMemory(True)
  
  expect="""--> Invalid expression
  --> xmlXPathEval: evaluation failed
  --> Invalid expression
  --> xmlXPathEval: evaluation failed
  --> Invalid expression
  --> xmlXPathEval: evaluation failed
  --> Invalid expression
  --> xmlXPathEval: evaluation failed
  --> Invalid expression
  --> xmlXPathEval: evaluation failed
  --> Invalid expression
  --> xmlXPathEval: evaluation failed
  --> Invalid expression
  --> xmlXPathEval: evaluation failed
  --> Invalid expression
  --> xmlXPathEval: evaluation failed
  --> Invalid expression
  --> xmlXPathEval: evaluation failed
  --> Invalid expression
  --> xmlXPathEval: evaluation failed
  """
  err=""
  def callback(ctx, str):
       global err
  
       err = err + "%s %s" % (ctx, str)
  
  libxml2.registerErrorHandler(callback, "-->")
  
  doc = libxml2.parseDoc("<fish/>")
  ctxt = doc.xpathNewContext()
  ctxt.setContextNode(doc)
  badexprs = (
  	":false()", "bad:()", "bad(:)", ":bad(:)", "bad:(:)", "bad:bad(:)",
  	"a:/b", "/c:/d", "//e:/f", "g://h"
  	)
  for expr in badexprs:
  	try:
  		ctxt.xpathEval(expr)
  	except libxml2.xpathError, e:
  	        pass
  	else:
  		print "Unexpectedly legal expression:", expr
  ctxt.xpathFreeContext()
  doc.freeDoc()
  
  if err != expect:
      print "error"
      print "received %s" %(err)
      print "expected %s" %(expect)
      sys.exit(1)
  
  libxml2.cleanupParser()
  leakedbytes = libxml2.debugMemory(True)
  if leakedbytes == 0:
  	print "OK"
  else:
  	print "Memory leak", leakedbytes, "bytes"
  	# drop file to .memdump file in cwd, but won't work if not compiled in
  	libxml2.dumpMemory()
  

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