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3a03005ff9
Fix the 'segmentation fault' bug of 'perf list --list-cmds', which also happens in other cases (e.g. record, report ...). This bug happens when there are no cmds to list at all. Example: Before this patch: $ perf list --list-cmds Segmentation fault $ After this patch: $ perf list --list-cmds $ As shown above, the result prints nothing rather than a segmentation fault. The null result means 'perf list' has no cmds to display at this time. Signed-off-by: Yunlong Song <yunlong.song@huawei.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/r/1423833115-11199-5-git-send-email-yunlong.song@huawei.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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