Package: valgrind
Severity: normal
I tried on version 1:3.5.0-3, and it does work for me.
This is my test program:
#define _GNU_SOURCE
#include <sys/mman.h>
#include <stdio.h>
#include <stdlib.h>
int main()
{
void *someMem = malloc(10000);
void *aligned = (void*)((long)someMem & ~4095L);
((char*)aligned)[1000] = 'H';
void *remapedPtr = mremap(aligned, 4096, 1024 * 512, MREMAP_MAYMOVE);
printf("%smoved : %lx -> %lx : %c\n", (remapedPtr == aligned)? "not ": "",
aligned, remapedPtr, ((char*)remapedPtr)[1000]);
((char*)remapedPtr)[25000] = 'K';
void *backToAligned = mremap(remapedPtr, 1024 * 512, 4096, MREMAP_MAYMOVE |
MREMAP_FIXED, aligned);
printf("%smoved back : %lx -> %lx : %c\n", (backToAligned == aligned)? "":
"not ", remapedPtr, backToAligned, ((char*)backToAligned)[1000]);
free(someMem);
return 0;
}
And this is the valgrind result:
w...@celine:~/debian-fix/valgrind-test% valgrind ./mremap
==11380== Memcheck, a memory error detector
==11380== Copyright (C) 2002-2009, and GNU GPL'd, by Julian Seward et al.
==11380== Using Valgrind-3.5.0-Debian and LibVEX; rerun with -h for copyright
info
==11380== Command: ./mremap
==11380==
moved : 517a000 -> 4045000 : H
moved back : 4045000 -> 517a000 : H
==11380==
==11380== HEAP SUMMARY:
==11380== in use at exit: 0 bytes in 0 blocks
==11380== total heap usage: 1 allocs, 1 frees, 10,000 bytes allocated
==11380==
==11380== All heap blocks were freed -- no leaks are possible
==11380==
==11380== For counts of detected and suppressed errors, rerun with: -v
==11380== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 4 from 4)
w...@celine:~/debian-fix/valgrind-test%
Do you have a small example that will reproduce the problem ?
Regards,
JB
-- System Information:
Debian Release: squeeze/sid
APT prefers unstable
APT policy: (500, 'unstable')
Architecture: amd64 (x86_64)
Kernel: Linux 2.6.31-1-amd64 (SMP w/2 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Versions of packages valgrind depends on:
ii libc6 2.10.2-5 Embedded GNU C Library: Shared lib
ii libc6-dbg 2.10.2-5 Embedded GNU C Library: detached d
Versions of packages valgrind recommends:
ii gdb 7.0-1 The GNU Debugger
Versions of packages valgrind suggests:
pn alleyoop <none> (no description available)
ii kcachegrind 4:4.3.2-1 visualisation tool for the Valgrin
pn valkyrie <none> (no description available)
-- no debconf information
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