Start fixing test_bigmem:
- bigmemtest is replaced by precisionbigmemtest
- add a poor man's watchdog thread to print memory consumption
diff --git a/Lib/test/test_hashlib.py b/Lib/test/test_hashlib.py
index 17d752b..97981dd 100644
--- a/Lib/test/test_hashlib.py
+++ b/Lib/test/test_hashlib.py
@@ -17,7 +17,7 @@
 import unittest
 import warnings
 from test import support
-from test.support import _4G, precisionbigmemtest
+from test.support import _4G, bigmemtest
 
 # Were we compiled --with-pydebug or with #define Py_DEBUG?
 COMPILED_WITH_PYDEBUG = hasattr(sys, 'gettotalrefcount')
@@ -196,7 +196,7 @@
                    b'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789',
                    'd174ab98d277d9f5a5611c2c9f419d9f')
 
-    @precisionbigmemtest(size=_4G + 5, memuse=1)
+    @bigmemtest(size=_4G + 5, memuse=1)
     def test_case_md5_huge(self, size):
         if size == _4G + 5:
             try:
@@ -204,7 +204,7 @@
             except OverflowError:
                 pass # 32-bit arch
 
-    @precisionbigmemtest(size=_4G - 1, memuse=1)
+    @bigmemtest(size=_4G - 1, memuse=1)
     def test_case_md5_uintmax(self, size):
         if size == _4G - 1:
             try: