• Arnaldo Carvalho de Melo's avatar
    perf test: Look forward for symbol aliases · d3678758
    Arnaldo Carvalho de Melo authored
    Not just before, fixing these false positives:
    
    [acme@mica linux]$ perf test -v 1
     1: vmlinux symtab matches kallsyms:
    --- start ---
    Looking at the vmlinux_path (6 entries long)
    Using //lib/modules/2.6.37-rc5-00180-ge06b6bf/build/vmlinux for symbols
    0xffffffff81058dc0: diff name v: sys_vm86old k: sys_ni_syscall
    0xffffffff81058dc0: diff name v: sys_vm86 k: sys_ni_syscall
    0xffffffff81058dc0: diff name v: sys_subpage_prot k: sys_ni_syscall
    0xffffffff810b5f7c: diff name v: probe_kernel_write k: __probe_kernel_write
    0xffffffff810b5fe5: diff name v: probe_kernel_read k: __probe_kernel_read
    0xffffffff811bc380: diff name v: __memset k: memset
    0xffffffff81384a98: diff name v: __sched_text_start k: sleep_on_common
    0xffffffff81386750: diff name v: __sched_text_end k: _raw_spin_trylock
    0xffffffff8138cee8: diff name v: __irqentry_text_start k: do_IRQ
    0xffffffff8138f079: diff name v: __start_notes k: _etext
    0xffffffff8138f079: diff name v: __stop_notes k: _etext
    ---- end ----
    vmlinux symtab matches kallsyms: FAILED!
    
    [acme@mica linux]$
    
    Some are weak functions, others are just markers, etc. They get in the rb tree
    with the same addr, so we need to look around to find the symbol with the same
    name.
    
    We were looking just at the previous entries with the same addr, look forward
    too.
    
    Cc: Frederic Weisbecker <fweisbec@gmail.com>
    Cc: Han Pingtian <phan@redhat.com>
    Cc: Mike Galbraith <efault@gmx.de>
    Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
    Cc: Paul Mackerras <paulus@samba.org>
    Cc: Stephane Eranian <eranian@google.com>
    LKML-Reference: <new-submission>
    Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
    d3678758
builtin-test.c 7.27 KB