perf: Don't use 4 bytes as a default instruction breakpoint length
4 bytes is fine as a default access for data breakpoints. But
instruction breakpoints should take the native pointer length,
otherwise we get a -EINVAL in x86-64.
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Prasad <prasad@linux.vnet.ibm.com>
Cc: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Jason Wessel <jason.wessel@windriver.com>
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index 9bf0f40..4af5bd5 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -602,8 +602,15 @@
return EVT_FAILED;
}
- /* We should find a nice way to override the access type */
- attr->bp_len = HW_BREAKPOINT_LEN_4;
+ /*
+ * We should find a nice way to override the access length
+ * Provide some defaults for now
+ */
+ if (attr->bp_type == HW_BREAKPOINT_X)
+ attr->bp_len = sizeof(long);
+ else
+ attr->bp_len = HW_BREAKPOINT_LEN_4;
+
attr->type = PERF_TYPE_BREAKPOINT;
return EVT_HANDLED;