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7e1b659545
The algorithms used to prune aliases in symbols__fixup_duplicate() uses information available on ELF symtabs that are not present on /proc/kallsyms, so it picks different aliases as "best" for vmlinux and kallsyms. We could probably improve a bit this by having a list of aliases for the "best" symbols picked, instead of throwing this info, but that is left for when we find a real need. With this, 'perf test vmlinux' passes: # perf test -F 1 1: vmlinux symtab matches kallsyms: Ok # When we ask for verbose mode, we can see those warning: # perf test -F -v 1 1: vmlinux symtab matches kallsyms: --- start --- Looking at the vmlinux_path (8 entries long) Using /lib/modules/4.8.0-rc4+/build/vmlinux for symbols WARN: 0xffffffffb7001000: diff name v: xen_hypercall_set_trap_table k: hypercall_page WARN: 0xffffffffb7077970: diff end addr for aesni_gcm_dec v: 0xffffffffb707a2f2 k: 0xffffffffb7077a02 WARN: 0xffffffffb707a300: diff end addr for aesni_gcm_enc v: 0xffffffffb707cc03 k: 0xffffffffb707a392 WARN: 0xffffffffb707f950: diff end addr for aesni_gcm_enc_avx_gen2 v: 0xffffffffb7084ef6 k: 0xffffffffb707f9c3 WARN: 0xffffffffb7084f00: diff end addr for aesni_gcm_dec_avx_gen2 v: 0xffffffffb708a691 k: 0xffffffffb7084f73 WARN: 0xffffffffb708aa10: diff end addr for aesni_gcm_enc_avx_gen4 v: 0xffffffffb708f844 k: 0xffffffffb708aa83 WARN: 0xffffffffb708f850: diff end addr for aesni_gcm_dec_avx_gen4 v: 0xffffffffb709486f k: 0xffffffffb708f8c3 WARN: 0xffffffffb71a6e50: diff name v: perf_pmu_commit_txn.part.98 k: perf_pmu_cancel_txn.part.97 WARN: 0xffffffffb752e480: diff name v: wakeup_expire_count_show.part.5 k: wakeup_active_count_show.part.7 WARN: 0xffffffffb76e8d00: diff name v: phys_switch_id_show.part.11 k: phys_port_name_show.part.12 WARN: Maps only in vmlinux: ffffffffb7d7d000-ffffffffb7eeaac8 117d000 [kernel].init.text ffffffffb7eeaac8-ffffffffc03ad000 12eaac8 [kernel].exit.text ---- end ---- vmlinux symtab matches kallsyms: Ok # Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-6v5w1k8rpx4ggczlkw730vt0@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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