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vasprintf


Tracking down some memory leaks and need expert voice/s on vasprintf...


linux 2.6.19 #9 PREEMPT Mon Apr 6 15:44:03 EDT 2009 cris (gcc-cris using glibc version (/usr/local/cris/lib/gcc-lib/cris/2.7.2/)

Reference code:

static char *SetCurrentProcess(char *fmt,...)
{
    char *ptr=NULL;
    va_list list;
    va_start(list,fmt);
    vasprintf(&ptr,fmt,list);
    va_end(list);

    if (!ptr)
    {
        printf("fail to allocate ptr\n");
        return("");
    }

if (nProcStackIndex==PROCSTACK_SZ)
{
snprintf(cCurrentProcName,PROCSTACK_SZ,"%s",procstack[nProcStackIndex]);
}
else
{
++nProcStackIndex;
snprintf(procstack[nProcStackIndex],PROCSTACK_SZ,"[%s]",ptr);
snprintf(cCurrentProcName,PROCSTACK_SZ,"%s",procstack[nProcStackIndex]);
}
free(ptr);
return(procstack[nProcStackIndex]);
}




I'm using memwatch to help me locate the memory leaks. memwatch issues the error:

WILD free: <1> src/aemnet.c(1532), unknown pointer 0x1321f8

each time I free(ptr).


vasprintf() docs say to free the pointer. Yet doing so seems to trigger this error.


So I'm thinking maybe the glibc version doesn't need free(). But how???

Thoughts?

/m


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