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[Bug libc/3973] New: malloc_stats/struct mallinfo is not 64bits ready
- From: "madcoder at debian dot org" <sourceware-bugzilla at sourceware dot org>
- To: glibc-bugs at sources dot redhat dot com
- Date: 5 Feb 2007 22:07:27 -0000
- Subject: [Bug libc/3973] New: malloc_stats/struct mallinfo is not 64bits ready
- Reply-to: sourceware-bugzilla at sourceware dot org
the struct mallinfo has its field of type `int' making it wrap on 64bits
architectures (amd64 e.g.).
an obvious test case is:
----8<------------------
#include <malloc.h>
#include <stdio.h>
#include <stdlib.h>
#define CHUNK 0x40000000
int main(void) {
ssize_t size = 0;
int i;
for (i = 0; i < 5; i++) {
void *p = malloc(CHUNK);
if (p) {
size += CHUNK;
fprintf(stderr, "Chunk %d: [total %dMb]\n", i, (int)(size >> 20));
malloc_stats();
fputc('\n', stderr);
}
}
return 0;
}
---->8------------------
===============================================================
make a ; ./a
cc a.c -o a
Chunk 0: [total 1024Mb]
Arena 0:
system bytes = 0
in use bytes = 0
Total (incl. mmap):
system bytes = 1073745920
in use bytes = 1073745920
max mmap regions = 1
max mmap bytes = 1073745920
Chunk 1: [total 2048Mb]
Arena 0:
system bytes = 0
in use bytes = 0
Total (incl. mmap):
system bytes = 2147491840
in use bytes = 2147491840
max mmap regions = 2
max mmap bytes = 2147491840
Chunk 2: [total 3072Mb]
Arena 0:
system bytes = 0
in use bytes = 0
Total (incl. mmap):
system bytes = 3221237760
in use bytes = 3221237760
max mmap regions = 3
max mmap bytes = 3221237760
Chunk 3: [total 4096Mb]
Arena 0:
system bytes = 0
in use bytes = 0
Total (incl. mmap):
system bytes = 16384
in use bytes = 16384
max mmap regions = 4
max mmap bytes = 4294983680
Chunk 4: [total 5120Mb]
Arena 0:
system bytes = 0
in use bytes = 0
Total (incl. mmap):
system bytes = 1073762304
in use bytes = 1073762304
max mmap regions = 5
max mmap bytes = 5368729600
FYI it's debian bug http://bugs.debian.org/336608
--
Summary: malloc_stats/struct mallinfo is not 64bits ready
Product: glibc
Version: unspecified
Status: NEW
Severity: normal
Priority: P2
Component: libc
AssignedTo: drepper at redhat dot com
ReportedBy: madcoder at debian dot org
CC: glibc-bugs at sources dot redhat dot com
http://sourceware.org/bugzilla/show_bug.cgi?id=3973
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