• Ian Rogers's avatar
    perf map: Changes to reference counting · ec417ad4
    Ian Rogers authored
    When a pointer to a map exists do a get, when that pointer is
    overwritten or freed, put the map. This avoids issues with gets and
    puts being inconsistently used causing, use after puts, etc. For
    example, the map in struct addr_location is changed to hold a
    reference count. Reference count checking and address sanitizer were
    used to identify issues.
    Signed-off-by: default avatarIan Rogers <irogers@google.com>
    Cc: Adrian Hunter <adrian.hunter@intel.com>
    Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
    Cc: Alexey Bayduraev <alexey.v.bayduraev@linux.intel.com>
    Cc: Andi Kleen <ak@linux.intel.com>
    Cc: Andrew Morton <akpm@linux-foundation.org>
    Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
    Cc: Darren Hart <dvhart@infradead.org>
    Cc: Davidlohr Bueso <dave@stgolabs.net>
    Cc: Dmitriy Vyukov <dvyukov@google.com>
    Cc: Eric Dumazet <edumazet@google.com>
    Cc: German Gomez <german.gomez@arm.com>
    Cc: Hao Luo <haoluo@google.com>
    Cc: Ingo Molnar <mingo@redhat.com>
    Cc: James Clark <james.clark@arm.com>
    Cc: Jiri Olsa <jolsa@kernel.org>
    Cc: John Garry <john.g.garry@oracle.com>
    Cc: Kajol Jain <kjain@linux.ibm.com>
    Cc: Kan Liang <kan.liang@linux.intel.com>
    Cc: Leo Yan <leo.yan@linaro.org>
    Cc: Madhavan Srinivasan <maddy@linux.ibm.com>
    Cc: Mark Rutland <mark.rutland@arm.com>
    Cc: Masami Hiramatsu <mhiramat@kernel.org>
    Cc: Miaoqian Lin <linmq006@gmail.com>
    Cc: Namhyung Kim <namhyung@kernel.org>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Cc: Riccardo Mancini <rickyman7@gmail.com>
    Cc: Shunsuke Nakamura <nakamura.shun@fujitsu.com>
    Cc: Song Liu <song@kernel.org>
    Cc: Stephane Eranian <eranian@google.com>
    Cc: Stephen Brennan <stephen.s.brennan@oracle.com>
    Cc: Steven Rostedt (VMware) <rostedt@goodmis.org>
    Cc: Thomas Gleixner <tglx@linutronix.de>
    Cc: Thomas Richter <tmricht@linux.ibm.com>
    Cc: Yury Norov <yury.norov@gmail.com>
    Link: https://lore.kernel.org/r/20230404205954.2245628-2-irogers@google.comSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
    ec417ad4
code-reading.c 15.8 KB