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tools lib traceevent: Handle NULL comm name

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It is possible that a pid has no associated comm attached to it, although it
can still be passed to pevent_register_comm().

But if comm is NULL, it will cause strdup() to segfault. To prevent this
from happening, if comm is NULL use the default "<...>" name for the
pid.

Signed-off-by: Josef Bacik <[email protected]>
Cc: Andrew Morton <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Namhyung Kim <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Link: http://lkml.kernel.org/p/[email protected]
Signed-off-by: Steven Rostedt <[email protected]>
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
This commit is contained in:
Josef Bacik 2015-03-24 09:57:49 -04:00 • committed by Arnaldo Carvalho de Melo
commit deab6f55a2
1 changed files with 4 additions and 1 deletions
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5
tools/lib/traceevent/event-parse.c
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@ -304,7 +304,10 @@ int pevent_register_comm(struct pevent *pevent, const char *comm, int pid)
if (!item)
return -1;
item->comm = strdup(comm);
if (comm)
item->comm = strdup(comm);
else
item->comm = strdup("<...>");
if (!item->comm) {
free(item);
return -1;