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RE: Uninitialized Memory Read In Packed Enum
- From: "Lu, Alexandra (Alexandra)" <alexandra dot lu at alcatel-lucent dot com>
- To: "gcc-help at gcc dot gnu dot org" <gcc-help at gcc dot gnu dot org>
- Date: Sat, 19 Oct 2013 14:19:18 +0000
- Subject: RE: Uninitialized Memory Read In Packed Enum
- Authentication-results: sourceware.org; auth=none
Hi,
When I use the "__attribute__ packed" option to compact enum from 4 bytes to 1 byte, it works well for saving memory when placed with other 1 byte data. However, when this packed enum is used to instantiate say a local variable, our memory tool (Purify) will complain that 3 out of the 4 bytes are uninitialized, causing a lot of UMR errors. Is there any way to work around this problem to keep the memory tool happy?
Thanks,
Alexandra