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Merge from 3.1: Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)

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in order to make algorithmic complexity attacks on (e.g.) web apps much more complicated.

The environment variable PYTHONHASHSEED and the new command line flag -R control this
behavior.
This commit is contained in:
Georg Brandl 2012-02-20 21:31:46 +01:00
commit 09a7c72cad
34 changed files with 676 additions and 162 deletions
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22
Lib/test/test_gdb.py
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@ -52,13 +52,18 @@ class DebuggerTests(unittest.TestCase):
"""Test that the debugger can debug Python."""
def run_gdb(self, *args):
def run_gdb(self, *args, **env_vars):
"""Runs gdb with the command line given by *args.
Returns its stdout, stderr
"""
if env_vars:
env = os.environ.copy()
env.update(env_vars)
else:
env = None
out, err = subprocess.Popen(
args, stdout=subprocess.PIPE, stderr=subprocess.PIPE,
args, stdout=subprocess.PIPE, stderr=subprocess.PIPE, env=env,
).communicate()
return out.decode('utf-8', 'replace'), err.decode('utf-8', 'replace')
@ -118,7 +123,7 @@ class DebuggerTests(unittest.TestCase):
# print ' '.join(args)
# Use "args" to invoke gdb, capturing stdout, stderr:
out, err = self.run_gdb(*args)
out, err = self.run_gdb(*args, PYTHONHASHSEED='0')
# Ignore some noise on stderr due to the pending breakpoint:
err = err.replace('Function "%s" not defined.\n' % breakpoint, '')
@ -207,7 +212,8 @@ class PrettyPrintTests(DebuggerTests):
'Verify the pretty-printing of dictionaries'
self.assertGdbRepr({})
self.assertGdbRepr({'foo': 'bar'})
self.assertGdbRepr({'foo': 'bar', 'douglas':42})
self.assertGdbRepr({'foo': 'bar', 'douglas': 42},
"{'foo': 'bar', 'douglas': 42}")
def test_lists(self):
'Verify the pretty-printing of lists'
@ -269,8 +275,8 @@ class PrettyPrintTests(DebuggerTests):
def test_sets(self):
'Verify the pretty-printing of sets'
self.assertGdbRepr(set())
self.assertGdbRepr(set(['a', 'b']))
self.assertGdbRepr(set([4, 5, 6]))
self.assertGdbRepr(set(['a', 'b']), "{'a', 'b'}")
self.assertGdbRepr(set([4, 5, 6]), "{4, 5, 6}")
# Ensure that we handle sets containing the "dummy" key value,
# which happens on deletion:
@ -282,8 +288,8 @@ id(s)''')
def test_frozensets(self):
'Verify the pretty-printing of frozensets'
self.assertGdbRepr(frozenset())
self.assertGdbRepr(frozenset(['a', 'b']))
self.assertGdbRepr(frozenset([4, 5, 6]))
self.assertGdbRepr(frozenset(['a', 'b']), "frozenset({'a', 'b'})")
self.assertGdbRepr(frozenset([4, 5, 6]), "frozenset({4, 5, 6})")
def test_exceptions(self):
# Test a RuntimeError