d4ae421392
When converting int values, perf first extractes it to a ulonglong, then feeds it to babeltrace as a signed value. For negative 32 bit values (for example, return values of failed syscalls), the extracted data should be something like 0xfffffffe (-2). It becomes a large int64 value. Babeltrace denies to insert it with bt_ctf_field_signed_integer_set_value() because it is larger than 0x7fffffff, the largest positive value a 32 bit int can be. This patch introduces adjust_signedness(), which fills high bits of ulonglong with 1 if the value is negative. Signed-off-by: Wang Nan <wangnan0@huawei.com> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: He Kuang <hekuang@huawei.com> Cc: Jeremie Galarneau <jgalar@efficios.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Cc: Tom Zanussi <tzanussi@gmail.com> Link: http://lkml.kernel.org/r/1429372220-6406-8-git-send-email-jolsa@kernel.org Signed-off-by: Jiri Olsa <jolsa@kernel.org> [ s/signess/signedness/g ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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