• Arnaldo Carvalho de Melo's avatar
    perf evsel: Rename set_filter to apply_filter · f47805a2
    Arnaldo Carvalho de Melo authored
    We need to be able to go on constructing a complex filter in multiple
    stages, since we can only set one filter per event.
    
    For instance, we need to be able, in 'perf trace' to filter by the
    'common_pid' field all the time, if only for the tracer itself, to
    avoid a feedback loop, and, in addition, we may want to filter the
    raw_syscalls:sys_{enter,exit} events by its 'id' filter, when using
    'perf trace -e open,close' or 'perf trace -e !open,close', i.e. when
    we are interested in just a subset of syscalls or when we are not
    interested in it.
    
    So we will have:
    
       perf_evsel__set_filter(evsel, char *filter)
    
           Replaces whatever is in evsel->filter.
    
       perf_evsel__append_filter(evsel, const char *op, char *filter)
    
           Appends, using op ("&&" or "||") with what is in evsel->filter.
    
       perf_evsel__apply_filter(evsel, filter):
    
            That actually applies a filter, be it the one being
            constructed in evsel->filter, or any other, for tools
            with more specific ways to build the filter, issuing
            the appropriate ioctl for all the evsel fds.
    
    The same changes will be made to the evlist__{set,apply} variants to
    keep everything consistent.
    
    Cc: Adrian Hunter <adrian.hunter@intel.com>
    Cc: Borislav Petkov <bp@suse.de>
    Cc: David Ahern <dsahern@gmail.com>
    Cc: Don Zickus <dzickus@redhat.com>
    Cc: Frederic Weisbecker <fweisbec@gmail.com>
    Cc: Jiri Olsa <jolsa@redhat.com>
    Cc: Namhyung Kim <namhyung@kernel.org>
    Cc: Stephane Eranian <eranian@google.com>
    Link: http://lkml.kernel.org/n/tip-2s5z9xtpnc2lwio3cv5x0jek@git.kernel.orgSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
    f47805a2
evsel.c 52.1 KB