Date: Thu, 19 Dec 2002 15:20:17 +0300 From: Lev Serebryakov <lev@serebryakov.spb.ru> To: Ferruccio Vitale <freebsd@cs.tin.it>, hackers@freebsd.org Subject: Re[2]: dlinfo() from sunOS, _DYNAMIC from Linux: did we have something like this? Message-ID: <165246107764.20021219152017@serebryakov.spb.ru> In-Reply-To: <20021219120240.48ac3416.freebsd@cs.tin.it> References: <45792625.20021218000337@serebryakov.spb.ru> <20021219120240.48ac3416.freebsd@cs.tin.it>
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Hello Ferruccio,
Thursday, December 19, 2002, 2:02:40 PM, you wrote:
>> Here is very good profiler (IMHO, better than `gcc -g' + `gprof'):
>> FunctionCheck. But it need information about each module in program.
>> It uses dlinfo() function on SunOS and _DYNAMIC variable on Linux to
>> access all ELF symbol tables in loaded program. Did FreeBSD (4.x)
>> have something like this?
FV> try 'dladdr'.
Unfortunately, it is not solution. Here is code, which uses
dlinfo()/_DYNAMIC, and I could not understand, how could dladdr() be
used here:
/* try to find out about dynamically loaded objects */
#if HAVE_DECL__DYNAMIC == 1
dyn = _DYNAMIC;
#else
dlinfo(RTLD_SELF, RTLD_DI_LINKMAP, &lm);
#if HAVE_ELF32_DYN_ == 1
dyn = (Elf32_Dyn*)lm->l_ld;
#elif HAVE_ELF64_DYN_ == 1
dyn = (Elf64_Dyn*)lm->l_ld;
#else
dyn = NULL;
#endif
#endif
if (dyn != NULL)
{
for (; dyn->d_tag != DT_NULL; dyn++)
{
if (dyn->d_tag == DT_DEBUG)
{
rdb = (struct r_debug *)dyn->d_un.d_ptr;
break;
}
}
}
--
Best regards,
Lev mailto:lev@serebryakov.spb.ru
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