Em Tue, Mar 03, 2015 at 11:39:02AM +0900, Masami Hiramatsu escreveu: > (2015/03/03 0:46), Arnaldo Carvalho de Melo wrote: > > Em Mon, Mar 02, 2015 at 09:49:53PM +0900, Masami Hiramatsu escreveu: > >> With this patch; > >> ----- > >> # ./perf probe -x /usr/lib64/libc-2.17.so -V malloc > >> Available variables at malloc > >> @<__libc_malloc+0> > >> size_t bytes > >> # ./perf probe -x /usr/lib64/libc-2.17.so -a "malloc bytes" > >> Added new event: > >> probe_libc:malloc (on malloc in /usr/lib64/libc-2.17.so with bytes) > >> > >> You can now use it in all perf tools, such as: > >> > >> perf record -e probe_libc:malloc -aR sleep 1 > > > >> Reported-by: Arnaldo Carvalho de Melo <[email protected]> > > > > Humm, not working for me, after the patch: > > > > [root@ssdandy ~]# perf probe -x /usr/lib64/libc-2.17.so -V malloc > > Available variables at malloc > > @<__malloc_check_init+96> > > (No matched variables) >
Will try after a 'make build-test' finishes for the current batch > > [root@ssdandy ~]# > > > > And then the one asking for 'bytes' to be collectd fails. > > > > After processing the other patches I'll try to debug this... > > > > [root@ssdandy ~]# cat /etc/redhat-release > > Red Hat Enterprise Linux Server release 7.0 (Maipo) > > [root@ssdandy ~]# rpm -q glibc glibc-debuginfo > > glibc-2.17-55.el7_0.3.x86_64 > > glibc-debuginfo-2.17-55.el7_0.1.x86_64 > ^^^ why is this different from the glibc > version?? > > > [root@ssdandy ~]# > > [acme@ssdandy linux]$ readelf -Ws /usr/lib64/libc-2.17.so| grep malloc > [...] > > 4849: 0000000000080050 107 FUNC LOCAL DEFAULT 12 > > __malloc_check_init > > __malloc_check_init+96(0x60) becomes 0x80050 + 0x60 = 0x800b0 > > > 5351: 00000000000800c0 245 FUNC LOCAL DEFAULT 12 __malloc > > 1170: 00000000000800c0 245 FUNC GLOBAL DEFAULT 12 > > malloc@@GLIBC_2.2.5 > > that is not 0x800c0, so something goes wrong when translating the address > to probe point. Could you check the patch 1/4 was applied? > Actually there is a bug in the routine which gets the probe point from > address. 1/4 fixes it. This one? commit 0104fe69e0287cf3635657b4c6b26a18e0091697 Author: Masami Hiramatsu <[email protected]> Date: Mon Mar 2 21:49:46 2015 +0900 perf probe: Remove bias offset to find probe point by address Remove bias offset to find probe point by address. ---------------- Yes, it is applied. - Arnaldo -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
