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From: "jkearney at endeca dot com" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sources.redhat.com
Subject: [Bug libc/1349] New: malloc_usable_size() incorrect when MALLOC_CHECK_>0
Date: Sat, 17 Sep 2005 18:09:00 -0000 [thread overview]
Message-ID: <20050917180908.1349.jkearney@endeca.com> (raw)
When MALLOC_CHECK_>0, an extra byte is added to each allocation for checking.
malloc_usable_size() doesn't take this extra byte off the return value in this
case. Try the following with MALLOC_CHECK_=2:
void* p = malloc(7);
size_t usable = malloc_usable_size(p);
memset(p, 0, usable);
p = realloc(p, 7);
--
Summary: malloc_usable_size() incorrect when MALLOC_CHECK_>0
Product: glibc
Version: 2.3.5
Status: NEW
Severity: normal
Priority: P2
Component: libc
AssignedTo: gotom at debian dot or dot jp
ReportedBy: jkearney at endeca dot com
CC: glibc-bugs at sources dot redhat dot com
http://sourceware.org/bugzilla/show_bug.cgi?id=1349
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next reply other threads:[~2005-09-17 18:09 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-09-17 18:09 jkearney at endeca dot com [this message]
2005-09-28 22:46 ` [Bug libc/1349] " drepper at redhat dot com
2005-09-29 1:22 ` jkearney at endeca dot com
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