• Arnaldo Carvalho de Melo's avatar
    perf annotate: Use build-ids to find the right DSO · b36f19d5
    Arnaldo Carvalho de Melo authored
    We were still using the pathname found on the MMAP event, that could not
    be the one we used when recording, so use the build-id cache for that,
    only falling back to use the pathname in the MMAP event if no build-ids
    are available.
    
    With this we now also are able to do secure, seamless offline annotation.
    
    Example:
    
    [root@doppio linux-2.6-tip]# perf report -g none -v 2> /dev/null | head -10
         8.12%     Xorg  /usr/lib64/libpixman-1.so.0.14.0       0x0000000000026d02 B [.] pixman_rasterize_edges
         4.68%  firefox  /usr/lib64/xulrunner-1.9.1/libxul.so   0x00000000005dbdba B [.] 0x000000005dbdba
         3.70%  swapper  /lib/modules/2.6.34-rc6/build/vmlinux  0xffffffff81022cea ! [k] read_hpet
         2.96%     init  /lib/modules/2.6.34-rc6/build/vmlinux  0xffffffff81022cea ! [k] read_hpet
         2.73%  swapper  /lib/modules/2.6.34-rc6/build/vmlinux  0xffffffff8100a738 ! [k] mwait_idle_with_hints
    [root@doppio linux-2.6-tip]# perf annotate -v pixman_rasterize_edges 2>&1 | grep Executing
    Executing: objdump --start-address=0x000000371ce26670 --stop-address=0x000000371ce2709f -dS /root/.debug/.build-id/bd/6ac5199137aaeb279f864717d8d061477466c1|grep -v /root/.debug/.build-id/bd/6ac5199137aaeb279f864717d8d061477466c1|expand
    [root@doppio linux-2.6-tip]# perf buildid-list | grep libpixman-1.so.0.14.0
    bd6ac5199137aaeb279f864717d8d061477466c1 /usr/lib64/libpixman-1.so.0.14.0
    [root@doppio linux-2.6-tip]#
    Reported-by: default avatarStephane Eranian <eranian@google.com>
    Cc: Frédéric Weisbecker <fweisbec@gmail.com>
    Cc: Mike Galbraith <efault@gmx.de>
    Cc: Paul Mackerras <paulus@samba.org>
    Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
    Cc: Stephane Eranian <eranian@google.com>
    Cc: Tom Zanussi <tzanussi@gmail.com>
    LKML-Reference: <new-submission>
    Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
    b36f19d5
build-id.h 212 Bytes