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detailed syscall tracing (work in progress)
[lttng-modules.git] / probes / lttng-events.h
diff --git a/probes/lttng-events.h b/probes/lttng-events.h
index 8de92ba5ab4854815ab899d431c011fe347710c0..925e12daaec0eb249a029abab1c57a577c221b6e 100644 (file)
--- a/probes/lttng-events.h
+++ b/probes/lttng-events.h
@@ -1,3 +1,12 @@
+/*
+ * lttng-events.h
+ *
+ * Copyright (C) 2009 Steven Rostedt <rostedt@goodmis.org>
+ * Copyright (C) 2010-2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ *
+ * Dual LGPL v2.1/GPL v2 license.
+ */
+
 #include <linux/debugfs.h>
 #include "lttng.h"
 #include "lttng-types.h"
@@ -74,25 +83,31 @@ void trace_##_name(_proto);
 
 /* Named field types must be defined in lttng-types.h */
 
-#undef __field
-#define __field(_type, _item)                                  \
+#undef __field_full
+#define __field_full(_type, _item, _order, _base)              \
        {                                                       \
          .name = #_item,                                       \
-         .type = __type_integer(_type, __BYTE_ORDER, 10, none),\
+         .type = __type_integer(_type, _order, _base, none),   \
        },
 
+#undef __field
+#define __field(_type, _item)                                  \
+       __field_full(_type, _item, __BYTE_ORDER, 10)
+
 #undef __field_ext
-#define __field_ext(_type, _item, _filter_type)                __field(_type, _item)
+#define __field_ext(_type, _item, _filter_type)                        \
+       __field(_type, _item)
 
 #undef __field_network
 #define __field_network(_type, _item)                          \
-       {                                                       \
-         .name = #_item,                                       \
-         .type = __type_integer(_type, __BIG_ENDIAN, 10, none),\
-       },
+       __field_full(_type, _item, __BIG_ENDIAN, 10)
+
+#undef __field_network_hex
+#define __field_network_hex(_type, _item)                              \
+       __field_full(_type, _item, __BIG_ENDIAN, 16)
 
-#undef __array_enc
-#define __array_enc(_type, _item, _length, _encoding)          \
+#undef __array_enc_ext
+#define __array_enc_ext(_type, _item, _length, _order, _base, _encoding)\
        {                                                       \
          .name = #_item,                                       \
          .type =                                               \
@@ -101,21 +116,25 @@ void trace_##_name(_proto);
                  .u.array =                                    \
                        {                                       \
                            .length = _length,                  \
-                           .elem_type = __type_integer(_type, __BYTE_ORDER, 10, _encoding), \
+                           .elem_type = __type_integer(_type, _order, _base, _encoding), \
                        },                                      \
                },                                              \
        },
 
 #undef __array
 #define __array(_type, _item, _length)                         \
-       __array_enc(_type, _item, _length, none)
+       __array_enc_ext(_type, _item, _length, __BYTE_ORDER, 10, none)
 
 #undef __array_text
 #define __array_text(_type, _item, _length)                    \
-       __array_enc(_type, _item, _length, UTF8)
+       __array_enc_ext(_type, _item, _length, __BYTE_ORDER, 10, UTF8)
 
-#undef __dynamic_array_enc
-#define __dynamic_array_enc(_type, _item, _length, _encoding)  \
+#undef __array_hex
+#define __array_hex(_type, _item, _length)                     \
+       __array_enc_ext(_type, _item, _length, __BYTE_ORDER, 16, none)
+
+#undef __dynamic_array_enc_ext
+#define __dynamic_array_enc_ext(_type, _item, _length, _order, _base, _encoding) \
        {                                                       \
          .name = #_item,                                       \
          .type =                                               \
@@ -124,18 +143,22 @@ void trace_##_name(_proto);
                  .u.sequence =                                 \
                        {                                       \
                            .length_type = __type_integer(u32, __BYTE_ORDER, 10, none), \
-                           .elem_type = __type_integer(_type, __BYTE_ORDER, 10, _encoding), \
+                           .elem_type = __type_integer(_type, _order, _base, _encoding), \
                        },                                      \
                },                                              \
        },
 
 #undef __dynamic_array
 #define __dynamic_array(_type, _item, _length)                 \
-       __dynamic_array_enc(_type, _item, _length, none)
+       __dynamic_array_enc_ext(_type, _item, _length, __BYTE_ORDER, 10, none)
 
 #undef __dynamic_array_text
 #define __dynamic_array_text(_type, _item, _length)            \
-       __dynamic_array_enc(_type, _item, _length, UTF8)
+       __dynamic_array_enc_ext(_type, _item, _length, __BYTE_ORDER, 10, UTF8)
+
+#undef __dynamic_array_hex
+#define __dynamic_array_hex(_type, _item, _length)             \
+       __dynamic_array_enc_ext(_type, _item, _length, __BYTE_ORDER, 16, none)
 
 #undef __string
 #define __string(_item, _src)                                  \
@@ -188,12 +211,16 @@ static void __event_probe__##_name(void *__data, _proto);
 
 #include "lttng-events-reset.h"        /* Reset all macros within TRACE_EVENT */
 
+#ifndef TP_PROBE_CB
+#define TP_PROBE_CB(_template) &__event_probe__##_template
+#endif
+
 #undef DEFINE_EVENT
 #define DEFINE_EVENT(_template, _name, _proto, _args)                         \
                {                                                              \
                        .fields = __event_fields___##_template,                \
                        .name = #_name,                                        \
-                       .probe_callback = (void *) &__event_probe__##_template,\
+                       .probe_callback = (void *) TP_PROBE_CB(_template),     \
                        .nr_fields = ARRAY_SIZE(__event_fields___##_template), \
                        .owner = THIS_MODULE,                                  \
                },
@@ -237,25 +264,18 @@ static struct lttng_probe_desc TP_ID(__probe_desc___, TRACE_SYSTEM) = {
 
 /* Named field types must be defined in lttng-types.h */
 
-#undef __field
-#define __field(_type, _item)                                                 \
+#undef __field_full
+#define __field_full(_type, _item, _order, _base)                             \
        __event_len += lib_ring_buffer_align(__event_len, ltt_alignof(_type)); \
        __event_len += sizeof(_type);
 
-#undef __field_ext
-#define __field_ext(_type, _item, _filter_type)        __field(_type, _item)
-
-#undef __array
-#define __array(_type, _item, _length)                                        \
+#undef __array_enc_ext
+#define __array_enc_ext(_type, _item, _length, _order, _base, _encoding)       \
        __event_len += lib_ring_buffer_align(__event_len, ltt_alignof(_type)); \
        __event_len += sizeof(_type) * (_length);
 
-#undef __array_text
-#define __array_text(_type, _item, _length)                                   \
-       __array(_type, _item, _length)
-
-#undef __dynamic_array
-#define __dynamic_array(_type, _item, _length)                                \
+#undef __dynamic_array_enc_ext
+#define __dynamic_array_enc_ext(_type, _item, _length, _order, _base, _encoding)\
        __event_len += lib_ring_buffer_align(__event_len, ltt_alignof(u32));   \
        __event_len += sizeof(u32);                                            \
        __event_len += lib_ring_buffer_align(__event_len, ltt_alignof(_type)); \
@@ -263,10 +283,6 @@ static struct lttng_probe_desc TP_ID(__probe_desc___, TRACE_SYSTEM) = {
        __event_len += sizeof(_type) * __dynamic_len[__dynamic_len_idx];       \
        __dynamic_len_idx++;
 
-#undef __dynamic_array_text
-#define __dynamic_array_text(_type, _item, _length)                           \
-       __dynamic_array(_type, _item, _length)
-
 #undef __string
 #define __string(_item, _src)                                                 \
        __event_len += __dynamic_len[__dynamic_len_idx++] = strlen(_src) + 1;
@@ -302,30 +318,19 @@ static inline size_t __event_get_size__##_name(size_t *__dynamic_len, _proto) \
 
 /* Named field types must be defined in lttng-types.h */
 
-#undef __field
-#define __field(_type, _item)                                            \
+#undef __field_full
+#define __field_full(_type, _item, _order, _base)                        \
        __event_align = max_t(size_t, __event_align, ltt_alignof(_type));
 
-#undef __field_ext
-#define __field_ext(_type, _item, _filter_type)        __field(_type, _item)
-
-#undef __array
-#define __array(_type, _item, _length)                                   \
+#undef __array_enc_ext
+#define __array_enc_ext(_type, _item, _length, _order, _base, _encoding)  \
        __event_align = max_t(size_t, __event_align, ltt_alignof(_type));
 
-#undef __array_text
-#define __array_text(_type, _item, _length)                              \
-       __array(_type, _item, _length)
-
-#undef __dynamic_array
-#define __dynamic_array(_type, _item, _length)                           \
+#undef __dynamic_array_enc_ext
+#define __dynamic_array_enc_ext(_type, _item, _length, _order, _base, _encoding)\
        __event_align = max_t(size_t, __event_align, ltt_alignof(u32));   \
        __event_align = max_t(size_t, __event_align, ltt_alignof(_type));
 
-#undef __dynamic_array_text
-#define __dynamic_array_text(_type, _item, _length)                      \
-       __dynamic_array(_type, _item, _length)
-
 #undef __string
 #define __string(_item, _src)
 
@@ -358,25 +363,16 @@ static inline size_t __event_get_align__##_name(_proto)                         \
 
 /* Named field types must be defined in lttng-types.h */
 
-#undef __field
-#define __field(_type, _item)  _type   _item;
-
-#undef __field_ext
-#define __field_ext(_type, _item, _filter_type)        __field(_type, _item)
+#undef __field_full
+#define __field_full(_type, _item, _order, _base)      _type   _item;
 
-#undef __array
-#define __array(_type, _item, _length) _type   _item;
+#undef __array_enc_ext
+#define __array_enc_ext(_type, _item, _length, _order, _base, _encoding)  \
+       _type   _item;
 
-#undef __array_text
-#define __array_text(_type, _item, _length)                              \
-       __array(_type, _item, _length)
-
-#undef __dynamic_array
-#define __dynamic_array(_type, _item, _length) _type   _item;
-
-#undef __dynamic_array_text
-#define __dynamic_array_text(_type, _item, _length)                      \
-       __dynamic_array(_type, _item, _length)
+#undef __dynamic_array_enc_ext
+#define __dynamic_array_enc_ext(_type, _item, _length, _order, _base, _encoding)\
+       _type   _item;
 
 #undef __string
 #define __string(_item, _src)  char _item;
@@ -406,34 +402,23 @@ struct __event_typemap__##_name {                                       \
 
 #include "lttng-events-reset.h"        /* Reset all macros within TRACE_EVENT */
 
-#undef __field
-#define __field(_type, _item)                                          \
+#undef __field_full
+#define __field_full(_type, _item, _order, _base)                      \
        goto __assign_##_item;                                          \
 __end_field_##_item:
 
-#undef __field_ext
-#define __field_ext(_type, _item, _filter_type)        __field(_type, _item)
-
-#undef __array
-#define __array(_type, _item, _length)                                 \
+#undef __array_enc_ext
+#define __array_enc_ext(_type, _item, _length, _order, _base, _encoding)\
        goto __assign_##_item;                                          \
 __end_field_##_item:
 
-#undef __array_text
-#define __array_text(_type, _item, _length)                            \
-       __array(_type, _item, _length)
-
-#undef __dynamic_array
-#define __dynamic_array(_type, _item, _length)                         \
+#undef __dynamic_array_enc_ext
+#define __dynamic_array_enc_ext(_type, _item, _length, _order, _base, _encoding)\
        goto __assign_##_item##_1;                                      \
 __end_field_##_item##_1:                                               \
        goto __assign_##_item##_2;                                      \
 __end_field_##_item##_2:
 
-#undef __dynamic_array_text
-#define __dynamic_array_text(_type, _item, _length)                    \
-       __dynamic_array(_type, _item, _length)
-
 #undef __string
 #define __string(_item, _src)                                          \
        goto __assign_##_item;                                          \
@@ -448,8 +433,8 @@ __end_field_##_item:
 __assign_##dest:                                                       \
        {                                                               \
                __typeof__(__typemap.dest) __tmp = (src);               \
-               lib_ring_buffer_align_ctx(&ctx, ltt_alignof(__tmp));    \
-               __chan->ops->event_write(&ctx, &__tmp, sizeof(__tmp));  \
+               lib_ring_buffer_align_ctx(&__ctx, ltt_alignof(__tmp));  \
+               __chan->ops->event_write(&__ctx, &__tmp, sizeof(__tmp));\
        }                                                               \
        goto __end_field_##dest;
 
@@ -458,8 +443,8 @@ __assign_##dest:                                                    \
 __assign_##dest:                                                       \
        if (0)                                                          \
                (void) __typemap.dest;                                  \
-       lib_ring_buffer_align_ctx(&ctx, ltt_alignof(__typemap.dest));   \
-       __chan->ops->event_write(&ctx, src, len);                       \
+       lib_ring_buffer_align_ctx(&__ctx, ltt_alignof(__typemap.dest)); \
+       __chan->ops->event_write(&__ctx, src, len);                     \
        goto __end_field_##dest;
 
 #undef tp_memcpy_dyn
@@ -467,13 +452,13 @@ __assign_##dest:                                                  \
 __assign_##dest##_1:                                                   \
        {                                                               \
                u32 __tmpl = __dynamic_len[__dynamic_len_idx];          \
-               lib_ring_buffer_align_ctx(&ctx, ltt_alignof(u32));      \
-               __chan->ops->event_write(&ctx, &__tmpl, sizeof(u32));   \
+               lib_ring_buffer_align_ctx(&__ctx, ltt_alignof(u32));    \
+               __chan->ops->event_write(&__ctx, &__tmpl, sizeof(u32)); \
        }                                                               \
        goto __end_field_##dest##_1;                                    \
 __assign_##dest##_2:                                                   \
-       lib_ring_buffer_align_ctx(&ctx, ltt_alignof(__typemap.dest));   \
-       __chan->ops->event_write(&ctx, src,                             \
+       lib_ring_buffer_align_ctx(&__ctx, ltt_alignof(__typemap.dest)); \
+       __chan->ops->event_write(&__ctx, src,                           \
                sizeof(__typemap.dest) * __get_dynamic_array_len(dest));\
        goto __end_field_##dest##_2;
 
@@ -511,7 +496,7 @@ static void __event_probe__##_name(void *__data, _proto)                  \
 {                                                                            \
        struct ltt_event *__event = __data;                                   \
        struct ltt_channel *__chan = __event->chan;                           \
-       struct lib_ring_buffer_ctx ctx;                                       \
+       struct lib_ring_buffer_ctx __ctx;                                     \
        size_t __event_len, __event_align;                                    \
        size_t __dynamic_len_idx = 0;                                         \
        size_t __dynamic_len[ARRAY_SIZE(__event_fields___##_name)];           \
@@ -520,18 +505,22 @@ static void __event_probe__##_name(void *__data, _proto)                \
                                                                              \
        if (0)                                                                \
                (void) __dynamic_len_idx;       /* don't warn if unused */    \
-       if (!ACCESS_ONCE(__chan->session->active))                            \
+       if (unlikely(!ACCESS_ONCE(__chan->session->active)))                  \
+               return;                                                       \
+       if (unlikely(!ACCESS_ONCE(__chan->enabled)))                          \
+               return;                                                       \
+       if (unlikely(!ACCESS_ONCE(__event->enabled)))                         \
                return;                                                       \
        __event_len = __event_get_size__##_name(__dynamic_len, _args);        \
        __event_align = __event_get_align__##_name(_args);                    \
-       lib_ring_buffer_ctx_init(&ctx, __chan->chan, __event, __event_len,    \
+       lib_ring_buffer_ctx_init(&__ctx, __chan->chan, __event, __event_len,  \
                                 __event_align, -1);                          \
-       __ret = __chan->ops->event_reserve(&ctx, __event->id);                \
+       __ret = __chan->ops->event_reserve(&__ctx, __event->id);              \
        if (__ret < 0)                                                        \
                return;                                                       \
        /* Control code (field ordering) */                                   \
        _tstruct                                                              \
-       __chan->ops->event_commit(&ctx);                                      \
+       __chan->ops->event_commit(&__ctx);                                    \
        return;                                                               \
        /* Copy code, steered by control code */                              \
        _assign                                                               \
@@ -554,6 +543,7 @@ static void __event_probe__##_name(void *__data, _proto)                  \
 #define module_exit_eval1(_token, _system)     module_exit(_token##_system)
 #define module_exit_eval(_token, _system)      module_exit_eval1(_token, _system)
 
+#ifndef TP_MODULE_OVERRIDE
 static int TP_ID(__lttng_events_init__, TRACE_SYSTEM)(void)
 {
        wrapper_vmalloc_sync_all();
@@ -568,6 +558,7 @@ static void TP_ID(__lttng_events_exit__, TRACE_SYSTEM)(void)
 }
 
 module_exit_eval(__lttng_events_exit__, TRACE_SYSTEM);
+#endif
 
 #undef module_init_eval
 #undef module_exit_eval
LTTng 2.0/0.x modules
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