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Before: perf trace -i perf.data Segmentation fault (core dumped) # After: # perf trace -i perf.data Data file does not have raw_syscalls:sys_enter events # When there are no tracepoints in a perf.data file the struct pevent that contains the list of tracepoints that will be used to lookup the tracepoint id by name will not be populated, causing a NULL deref. And we don't need to do all that dance to look at pevents for an entry with a slighly different name to then lookup the tracepoint by its id on the evlist, just use the perf_evlist__find_tracepoint_by_name() routine, that will find the tracepoint, if present. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-egcm21k1e6gcyxpcgjxtmsq3@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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