[Python-checkins] r69718 - in python/trunk: Lib/test/test_mmap.py Misc/NEWS Modules/mmapmodule.c
hirokazu.yamamoto
python-checkins at python.org
Tue Feb 17 14:17:26 CET 2009
Author: hirokazu.yamamoto
Date: Tue Feb 17 14:17:26 2009
New Revision: 69718
Log:
Issue #5282: Fixed mmap resize on 32bit windows and unix. When offset > 0,
The file was resized to wrong size.
Modified:
python/trunk/Lib/test/test_mmap.py
python/trunk/Misc/NEWS
python/trunk/Modules/mmapmodule.c
Modified: python/trunk/Lib/test/test_mmap.py
==============================================================================
--- python/trunk/Lib/test/test_mmap.py (original)
+++ python/trunk/Lib/test/test_mmap.py Tue Feb 17 14:17:26 2009
@@ -417,6 +417,27 @@
m = mmap.mmap(f.fileno(), mapsize - halfsize, offset=halfsize)
self.assertEqual(m[0:3], 'foo')
f.close()
+
+ # Try resizing map
+ try:
+ m.resize(512)
+ except SystemError:
+ pass
+ else:
+ # resize() is supported
+ self.assertEqual(len(m), 512)
+ # Check that we can no longer seek beyond the new size.
+ self.assertRaises(ValueError, m.seek, 513, 0)
+ # Check that the content is not changed
+ self.assertEqual(m[0:3], 'foo')
+
+ # Check that the underlying file is truncated too
+ f = open(TESTFN)
+ f.seek(0, 2)
+ self.assertEqual(f.tell(), halfsize + 512)
+ f.close()
+ self.assertEqual(m.size(), halfsize + 512)
+
m.close()
finally:
Modified: python/trunk/Misc/NEWS
==============================================================================
--- python/trunk/Misc/NEWS (original)
+++ python/trunk/Misc/NEWS Tue Feb 17 14:17:26 2009
@@ -159,6 +159,9 @@
Library
-------
+- Issue #5282: Fixed mmap resize on 32bit windows and unix. When offset > 0,
+ The file was resized to wrong size.
+
- Issue #5292: Fixed mmap crash on its boundary access m[len(m)].
- Issue #2279: distutils.sdist.add_defaults now add files
Modified: python/trunk/Modules/mmapmodule.c
==============================================================================
--- python/trunk/Modules/mmapmodule.c (original)
+++ python/trunk/Modules/mmapmodule.c Tue Feb 17 14:17:26 2009
@@ -444,7 +444,7 @@
off_lo = (DWORD)(self->offset & 0xFFFFFFFF);
#else
newSizeHigh = 0;
- newSizeLow = (DWORD)new_size;
+ newSizeLow = (DWORD)(self->offset + new_size);
off_hi = 0;
off_lo = (DWORD)self->offset;
#endif
@@ -490,7 +490,7 @@
} else {
void *newmap;
- if (ftruncate(self->fd, new_size) == -1) {
+ if (ftruncate(self->fd, self->offset + new_size) == -1) {
PyErr_SetFromErrno(mmap_module_error);
return NULL;
}
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