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[Bug c++/52955] New: Missing warning on wrong sizeof usage
- From: "xinliangli at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Thu, 12 Apr 2012 21:57:43 +0000
- Subject: [Bug c++/52955] New: Missing warning on wrong sizeof usage
- Auto-submitted: auto-generated
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52955
Bug #: 52955
Summary: Missing warning on wrong sizeof usage
Classification: Unclassified
Product: gcc
Version: 4.8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: xinliangli@gmail.com
Example:
#include <memory.h>
struct S { int a, b, c; float vec[16]; };
void test(S *s) {
// ...
memset(s, 0, sizeof(s));
// ...
}
/*
memset.cpp:5:23: warning: argument to 'sizeof' in 'memset' call is the
same expression as the destination; did you mean to dereference it? [-
Wsizeof-pointer-memaccess]
memset(s, 0, sizeof(s));
~ ^
1 warning generated.
*/