• Arnaldo Carvalho de Melo's avatar
    perf tools: Reference count struct map · 84c2cafa
    Arnaldo Carvalho de Melo authored
    We have pointers to struct map instances in several places, like in the
    hist_entry instances, so we need a way to know when we can destroy them,
    otherwise we may either keep leaking them or end up referencing deleted
    instances.
    
    Start fixing it by reference counting them.
    
    This patch puts the reference count for struct map in place, replacing
    direct map__delete() calls with map__put() ones and then grabbing a
    reference count when adding it to the maps struct where maps for a
    struct thread are kept.
    
    Next we'll grab reference counts when setting pointers to struct map
    instances, in places like in the hist_entry code.
    
    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-wi19xczk0t2a41r1i2chuio5@git.kernel.orgSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
    84c2cafa
map.h 6.96 KB