tracing: expose current->comm to [ku]probe events

[deliverable/linux.git] / kernel / trace / trace_probe.h

diff --git a/kernel/trace/trace_probe.h b/kernel/trace/trace_probe.h
index f6398db0911424cca72031a7a5831d505fae71b7..45400ca5ded1acf673d713851f930425b1d20849 100644 (file)
--- a/kernel/trace/trace_probe.h
+++ b/kernel/trace/trace_probe.h
@@ -102,6 +102,7 @@ enum {
        FETCH_MTD_reg = 0,
        FETCH_MTD_stack,
        FETCH_MTD_retval,
+       FETCH_MTD_comm,
        FETCH_MTD_memory,
        FETCH_MTD_symbol,
        FETCH_MTD_deref,
@@ -183,6 +184,14 @@ DECLARE_BASIC_FETCH_FUNCS(bitfield);
 #define fetch_bitfield_string                  NULL
 #define fetch_bitfield_string_size             NULL
 
+/* comm only makes sense as a string */
+#define fetch_comm_u8          NULL
+#define fetch_comm_u16         NULL
+#define fetch_comm_u32         NULL
+#define fetch_comm_u64         NULL
+DECLARE_FETCH_FUNC(comm, string);
+DECLARE_FETCH_FUNC(comm, string_size);
+
 /*
  * Define macro for basic types - we don't need to define s* types, because
  * we have to care only about bitwidth at recording time.
@@ -213,6 +222,7 @@ DEFINE_FETCH_##method(u64)
 ASSIGN_FETCH_FUNC(reg, ftype),                         \
 ASSIGN_FETCH_FUNC(stack, ftype),                       \
 ASSIGN_FETCH_FUNC(retval, ftype),                      \
+ASSIGN_FETCH_FUNC(comm, ftype),                                \
 ASSIGN_FETCH_FUNC(memory, ftype),                      \
 ASSIGN_FETCH_FUNC(symbol, ftype),                      \
 ASSIGN_FETCH_FUNC(deref, ftype),                       \