trunk/tests/kernel/test-trace.c

   1 /*
   2  * test-trace.c
   3  *
   4  * Test tracepoint probes.
   5  */
   6
   7 #include <linux/module.h>
   8 #include "tp-test.h"
   9 #include <linux/ltt-type-serializer.h>
  10
  11 /* kernel_trap_entry specialized tracepoint probe */
  12
  13 struct serialize_long_long {
  14         unsigned long f1;
  15         unsigned long f2;
  16         unsigned char end_field[0];
  17 } LTT_ALIGN;
  18
  19 void probe_test(void *a, void *b);
  20
  21 DEFINE_MARKER_TP(kernel, test, kernel_test,
  22         probe_test, "f1 %p f2 %p");
  23
  24 notrace void probe_test(void *a, void *b)
  25 {
  26         struct marker *marker;
  27         struct serialize_long_long data;
  28
  29         data.f1 = (long)a;
  30         data.f2 = (long)b;
  31
  32         marker = &GET_MARKER(kernel, test);
  33         ltt_specialized_trace(marker, marker->single.probe_private,
  34                 &data, serialize_sizeof(data), sizeof(long));
  35 }
  36
  37 MODULE_LICENSE("GPL");
  38 MODULE_AUTHOR("Mathieu Desnoyers");
  39 MODULE_DESCRIPTION("Test Tracepoint Probes");