Hi,
I'm on Solaris 10 3/05 using Sun Studio 11 C compiler. I'm using ::findleaks to
search for memory leaks. I found somehow ::findleaks can't find all obvious
leaks. I made small a test program below which contains three leaks to
illustrate the problem. Can anyone tell me why? Thanks.
test program: leak.c
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
void mysleep()
{
printf("sleeping for 60 seconds to allow gcore\n");
sleep(60);
}
void *f3()
{
return malloc(400);
}
void f2()
{
char *p;
p=malloc(3330);
}
void main()
{
f2();
f2();
f3();
mysleep();
}
I compiled it using "cc -g -o leak leak.c". Blow is what did to reproduce the
problem.
1) # UMEM_DEBUG=default; LD_PRELAOD=libumem.so.1; export UMEM_DEBUG LD_PRELOAD
2) # leak &
sleeping for 60 seconds to allow gcore
[1] 23724
3) # gcore 23724
gcore: core.23724 dumped
4) # mdb core.23724
Loading modules: [ libumem.so.1 libc.so.1 ld.so.1 ]
> ::findleaks -dv
findleaks: using cached results (-f will force a full run)
CACHE LEAKED BUFCTL CALLER
00033008 1 00043c20 f2+4
----------------------------------------------------------------------
Total 1 buffer, 4096 bytes
umem_alloc_4096 leak: 1 buffer, 4096 bytes
ADDR BUFADDR TIMESTAMP THREAD
CACHE LASTLOG CONTENTS
43c20 3d200 e8e332cc57f2 1
33008 0 0
libumem.so.1`umem_cache_alloc+0x13c
libumem.so.1`umem_alloc+0x60
libumem.so.1`malloc+0x28
f2+4
main+0xc
_start+0x108
>
::findleaks only found 1 leak but actually there are 3 leaks. Anyone can
explain why and how to find all leaks? Thank you.
-- Hunter
This message posted from opensolaris.org
