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-rw-r--r--include/linux/tracepoint.h3
-rw-r--r--include/trace/sched_event_types.h48
-rw-r--r--kernel/trace/trace.h5
-rw-r--r--kernel/trace/trace_event_types.h3
-rw-r--r--kernel/trace/trace_events.c159
-rw-r--r--kernel/trace/trace_events_stage_1.h28
-rw-r--r--kernel/trace/trace_events_stage_2.h89
-rw-r--r--kernel/trace/trace_events_stage_3.h34
-rw-r--r--kernel/trace/trace_export.c23
9 files changed, 159 insertions, 233 deletions
diff --git a/include/linux/tracepoint.h b/include/linux/tracepoint.h
index 3bcc3e17144..6b4f1bb3701 100644
--- a/include/linux/tracepoint.h
+++ b/include/linux/tracepoint.h
@@ -160,4 +160,7 @@ static inline void tracepoint_synchronize_unregister(void)
#define TRACE_EVENT_FORMAT(name, proto, args, fmt, struct, tpfmt) \
TRACE_FORMAT(name, PARAMS(proto), PARAMS(args), PARAMS(fmt))
+#define TRACE_EVENT(name, proto, args, struct, print, assign) \
+ DECLARE_TRACE(name, PARAMS(proto), PARAMS(args))
+
#endif
diff --git a/include/trace/sched_event_types.h b/include/trace/sched_event_types.h
index 71b14828a95..aa77fb75403 100644
--- a/include/trace/sched_event_types.h
+++ b/include/trace/sched_event_types.h
@@ -62,25 +62,41 @@ TRACE_EVENT_FORMAT(sched_wakeup_new,
TP_RAW_FMT("task %d success=%d")
);
-TRACE_EVENT_FORMAT(sched_switch,
+/*
+ * Tracepoint for task switches, performed by the scheduler:
+ *
+ * (NOTE: the 'rq' argument is not used by generic trace events,
+ * but used by the latency tracer plugin. )
+ */
+TRACE_EVENT(sched_switch,
+
TP_PROTO(struct rq *rq, struct task_struct *prev,
- struct task_struct *next),
+ struct task_struct *next),
+
TP_ARGS(rq, prev, next),
- TP_FMT("task %s:%d ==> %s:%d",
- prev->comm, prev->pid, next->comm, next->pid),
- TRACE_STRUCT(
- TRACE_FIELD(pid_t, prev_pid, prev->pid)
- TRACE_FIELD(int, prev_prio, prev->prio)
- TRACE_FIELD_SPECIAL(char next_comm[TASK_COMM_LEN],
- next_comm,
- TP_CMD(memcpy(TRACE_ENTRY->next_comm,
- next->comm,
- TASK_COMM_LEN)))
- TRACE_FIELD(pid_t, next_pid, next->pid)
- TRACE_FIELD(int, next_prio, next->prio)
+
+ TP_STRUCT__entry(
+ __array( char, prev_comm, TASK_COMM_LEN )
+ __field( pid_t, prev_pid )
+ __field( int, prev_prio )
+ __array( char, next_comm, TASK_COMM_LEN )
+ __field( pid_t, next_pid )
+ __field( int, next_prio )
),
- TP_RAW_FMT("prev %d:%d ==> next %s:%d:%d")
- );
+
+ TP_printk("task %s:%d [%d] ==> %s:%d [%d]",
+ __entry->prev_comm, __entry->prev_pid, __entry->prev_prio,
+ __entry->next_comm, __entry->next_pid, __entry->next_prio),
+
+ TP_fast_assign(
+ memcpy(__entry->next_comm, next->comm, TASK_COMM_LEN);
+ __entry->prev_pid = prev->pid;
+ __entry->prev_prio = prev->prio;
+ memcpy(__entry->prev_comm, prev->comm, TASK_COMM_LEN);
+ __entry->next_pid = next->pid;
+ __entry->next_prio = next->prio;
+ )
+);
TRACE_EVENT_FORMAT(sched_migrate_task,
TP_PROTO(struct task_struct *p, int orig_cpu, int dest_cpu),
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index 2bfb7d11fc1..c5e1d8865fe 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -751,12 +751,7 @@ struct ftrace_event_call {
int (*regfunc)(void);
void (*unregfunc)(void);
int id;
- struct dentry *raw_dir;
- int raw_enabled;
- int type;
int (*raw_init)(void);
- int (*raw_reg)(void);
- void (*raw_unreg)(void);
int (*show_format)(struct trace_seq *s);
};
diff --git a/kernel/trace/trace_event_types.h b/kernel/trace/trace_event_types.h
index d94179aa1fc..5cca4c978bd 100644
--- a/kernel/trace/trace_event_types.h
+++ b/kernel/trace/trace_event_types.h
@@ -106,9 +106,10 @@ TRACE_EVENT_FORMAT(print, TRACE_PRINT, print_entry, ignore,
TRACE_STRUCT(
TRACE_FIELD(unsigned long, ip, ip)
TRACE_FIELD(unsigned int, depth, depth)
+ TRACE_FIELD(char *, fmt, fmt)
TRACE_FIELD_ZERO_CHAR(buf)
),
- TP_RAW_FMT("%08lx (%d) %s")
+ TP_RAW_FMT("%08lx (%d) fmt:%p %s")
);
TRACE_EVENT_FORMAT(branch, TRACE_BRANCH, trace_branch, ignore,
diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c
index fa32ca32076..1880a643809 100644
--- a/kernel/trace/trace_events.c
+++ b/kernel/trace/trace_events.c
@@ -59,22 +59,12 @@ static void ftrace_event_enable_disable(struct ftrace_event_call *call,
call->enabled = 0;
call->unregfunc();
}
- if (call->raw_enabled) {
- call->raw_enabled = 0;
- call->raw_unreg();
- }
break;
case 1:
- if (!call->enabled &&
- (call->type & TRACE_EVENT_TYPE_PRINTF)) {
+ if (!call->enabled) {
call->enabled = 1;
call->regfunc();
}
- if (!call->raw_enabled &&
- (call->type & TRACE_EVENT_TYPE_RAW)) {
- call->raw_enabled = 1;
- call->raw_reg();
- }
break;
}
}
@@ -300,7 +290,7 @@ event_enable_read(struct file *filp, char __user *ubuf, size_t cnt,
struct ftrace_event_call *call = filp->private_data;
char *buf;
- if (call->enabled || call->raw_enabled)
+ if (call->enabled)
buf = "1\n";
else
buf = "0\n";
@@ -346,107 +336,6 @@ event_enable_write(struct file *filp, const char __user *ubuf, size_t cnt,
return cnt;
}
-static ssize_t
-event_type_read(struct file *filp, char __user *ubuf, size_t cnt,
- loff_t *ppos)
-{
- struct ftrace_event_call *call = filp->private_data;
- char buf[16];
- int r = 0;
-
- if (call->type & TRACE_EVENT_TYPE_PRINTF)
- r += sprintf(buf, "printf\n");
-
- if (call->type & TRACE_EVENT_TYPE_RAW)
- r += sprintf(buf+r, "raw\n");
-
- return simple_read_from_buffer(ubuf, cnt, ppos, buf, r);
-}
-
-static ssize_t
-event_type_write(struct file *filp, const char __user *ubuf, size_t cnt,
- loff_t *ppos)
-{
- struct ftrace_event_call *call = filp->private_data;
- char buf[64];
-
- /*
- * If there's only one type, we can't change it.
- * And currently we always have printf type, and we
- * may or may not have raw type.
- *
- * This is a redundant check, the file should be read
- * only if this is the case anyway.
- */
-
- if (!call->raw_init)
- return -EPERM;
-
- if (cnt >= sizeof(buf))
- return -EINVAL;
-
- if (copy_from_user(&buf, ubuf, cnt))
- return -EFAULT;
-
- buf[cnt] = 0;
-
- if (!strncmp(buf, "printf", 6) &&
- (!buf[6] || isspace(buf[6]))) {
-
- call->type = TRACE_EVENT_TYPE_PRINTF;
-
- /*
- * If raw enabled, the disable it and enable
- * printf type.
- */
- if (call->raw_enabled) {
- call->raw_enabled = 0;
- call->raw_unreg();
-
- call->enabled = 1;
- call->regfunc();
- }
-
- } else if (!strncmp(buf, "raw", 3) &&
- (!buf[3] || isspace(buf[3]))) {
-
- call->type = TRACE_EVENT_TYPE_RAW;
-
- /*
- * If printf enabled, the disable it and enable
- * raw type.
- */
- if (call->enabled) {
- call->enabled = 0;
- call->unregfunc();
-
- call->raw_enabled = 1;
- call->raw_reg();
- }
- } else
- return -EINVAL;
-
- *ppos += cnt;
-
- return cnt;
-}
-
-static ssize_t
-event_available_types_read(struct file *filp, char __user *ubuf, size_t cnt,
- loff_t *ppos)
-{
- struct ftrace_event_call *call = filp->private_data;
- char buf[16];
- int r = 0;
-
- r += sprintf(buf, "printf\n");
-
- if (call->raw_init)
- r += sprintf(buf+r, "raw\n");
-
- return simple_read_from_buffer(ubuf, cnt, ppos, buf, r);
-}
-
#undef FIELD
#define FIELD(type, name) \
#type, #name, (unsigned int)offsetof(typeof(field), name), \
@@ -470,6 +359,7 @@ static int trace_write_header(struct trace_seq *s)
FIELD(int, pid),
FIELD(int, tgid));
}
+
static ssize_t
event_format_read(struct file *filp, char __user *ubuf, size_t cnt,
loff_t *ppos)
@@ -527,13 +417,6 @@ static const struct seq_operations show_set_event_seq_ops = {
.stop = t_stop,
};
-static const struct file_operations ftrace_avail_fops = {
- .open = ftrace_event_seq_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = seq_release,
-};
-
static const struct file_operations ftrace_set_event_fops = {
.open = ftrace_event_seq_open,
.read = seq_read,
@@ -548,17 +431,6 @@ static const struct file_operations ftrace_enable_fops = {
.write = event_enable_write,
};
-static const struct file_operations ftrace_type_fops = {
- .open = tracing_open_generic,
- .read = event_type_read,
- .write = event_type_write,
-};
-
-static const struct file_operations ftrace_available_types_fops = {
- .open = tracing_open_generic,
- .read = event_available_types_read,
-};
-
static const struct file_operations ftrace_event_format_fops = {
.open = tracing_open_generic,
.read = event_format_read,
@@ -647,9 +519,6 @@ event_create_dir(struct ftrace_event_call *call, struct dentry *d_events)
}
}
- /* default the output to printf */
- call->type = TRACE_EVENT_TYPE_PRINTF;
-
call->dir = debugfs_create_dir(call->name, d_events);
if (!call->dir) {
pr_warning("Could not create debugfs "
@@ -665,21 +534,6 @@ event_create_dir(struct ftrace_event_call *call, struct dentry *d_events)
"'%s/enable' entry\n", call->name);
}
- /* Only let type be writable, if we can change it */
- entry = debugfs_create_file("type",
- call->raw_init ? 0644 : 0444,
- call->dir, call,
- &ftrace_type_fops);
- if (!entry)
- pr_warning("Could not create debugfs "
- "'%s/type' entry\n", call->name);
-
- entry = debugfs_create_file("available_types", 0444, call->dir, call,
- &ftrace_available_types_fops);
- if (!entry)
- pr_warning("Could not create debugfs "
- "'%s/available_types' entry\n", call->name);
-
/* A trace may not want to export its format */
if (!call->show_format)
return 0;
@@ -704,13 +558,6 @@ static __init int event_trace_init(void)
if (!d_tracer)
return 0;
- entry = debugfs_create_file("available_events", 0444, d_tracer,
- (void *)&show_event_seq_ops,
- &ftrace_avail_fops);
- if (!entry)
- pr_warning("Could not create debugfs "
- "'available_events' entry\n");
-
entry = debugfs_create_file("set_event", 0644, d_tracer,
(void *)&show_set_event_seq_ops,
&ftrace_set_event_fops);
diff --git a/kernel/trace/trace_events_stage_1.h b/kernel/trace/trace_events_stage_1.h
index 3830a731424..edfcbd3a0d1 100644
--- a/kernel/trace/trace_events_stage_1.h
+++ b/kernel/trace/trace_events_stage_1.h
@@ -18,19 +18,23 @@
#define TRACE_FORMAT(call, proto, args, fmt)
#undef TRACE_EVENT_FORMAT
-#define TRACE_EVENT_FORMAT(name, proto, args, fmt, tstruct, tpfmt) \
- struct ftrace_raw_##name { \
- struct trace_entry ent; \
- tstruct \
- }; \
- static struct ftrace_event_call event_##name
+#define TRACE_EVENT_FORMAT(name, proto, args, fmt, tstruct, tpfmt)
+
+#undef __array
+#define __array(type, item, len) type item[len];
-#undef TRACE_STRUCT
-#define TRACE_STRUCT(args...) args
+#undef __field
+#define __field(type, item) type item;
-#define TRACE_FIELD(type, item, assign) \
- type item;
-#define TRACE_FIELD_SPECIAL(type_item, item, cmd) \
- type_item;
+#undef TP_STRUCT__entry
+#define TP_STRUCT__entry(args...) args
+
+#undef TRACE_EVENT
+#define TRACE_EVENT(name, proto, args, tstruct, print, assign) \
+ struct ftrace_raw_##name { \
+ struct trace_entry ent; \
+ tstruct \
+ }; \
+ static struct ftrace_event_call event_##name
#include <trace/trace_event_types.h>
diff --git a/kernel/trace/trace_events_stage_2.h b/kernel/trace/trace_events_stage_2.h
index 8e2e0f56c2a..d91bf4c5666 100644
--- a/kernel/trace/trace_events_stage_2.h
+++ b/kernel/trace/trace_events_stage_2.h
@@ -32,23 +32,14 @@
* in binary.
*/
-#undef TRACE_STRUCT
-#define TRACE_STRUCT(args...) args
+#undef __entry
+#define __entry field
-#undef TRACE_FIELD
-#define TRACE_FIELD(type, item, assign) \
- field->item,
+#undef TP_printk
+#define TP_printk(fmt, args...) fmt "\n", args
-#undef TRACE_FIELD_SPECIAL
-#define TRACE_FIELD_SPECIAL(type_item, item, cmd) \
- field->item,
-
-
-#undef TP_RAW_FMT
-#define TP_RAW_FMT(args...) args
-
-#undef TRACE_EVENT_FORMAT
-#define TRACE_EVENT_FORMAT(call, proto, args, fmt, tstruct, tpfmt) \
+#undef TRACE_EVENT
+#define TRACE_EVENT(call, proto, args, tstruct, print, assign) \
enum print_line_t \
ftrace_raw_output_##call(struct trace_iterator *iter, int flags) \
{ \
@@ -66,14 +57,76 @@ ftrace_raw_output_##call(struct trace_iterator *iter, int flags) \
\
field = (typeof(field))entry; \
\
- ret = trace_seq_printf(s, tpfmt "%s", tstruct "\n"); \
+ ret = trace_seq_printf(s, print); \
if (!ret) \
return TRACE_TYPE_PARTIAL_LINE; \
\
return TRACE_TYPE_HANDLED; \
}
-
+
#include <trace/trace_event_types.h>
-#include "trace_format.h"
+/*
+ * Setup the showing format of trace point.
+ *
+ * int
+ * ftrace_format_##call(struct trace_seq *s)
+ * {
+ * struct ftrace_raw_##call field;
+ * int ret;
+ *
+ * ret = trace_seq_printf(s, #type " " #item ";"
+ * " size:%d; offset:%d;\n",
+ * sizeof(field.type),
+ * offsetof(struct ftrace_raw_##call,
+ * item));
+ *
+ * }
+ */
+
+#undef TP_STRUCT__entry
+#define TP_STRUCT__entry(args...) args
+
+#undef __field
+#define __field(type, item) \
+ ret = trace_seq_printf(s, "\tfield:" #type " " #item ";\t" \
+ "offset:%u;\tsize:%u;\n", \
+ (unsigned int)offsetof(typeof(field), item), \
+ (unsigned int)sizeof(field.item)); \
+ if (!ret) \
+ return 0;
+
+#undef __array
+#define __array(type, item, len) \
+ ret = trace_seq_printf(s, "\tfield:" #type " " #item "[" #len "];\t" \
+ "offset:%u;\tsize:%u;\n", \
+ (unsigned int)offsetof(typeof(field), item), \
+ (unsigned int)sizeof(field.item)); \
+ if (!ret) \
+ return 0;
+
+#undef __entry
+#define __entry "REC"
+
+#undef TP_printk
+#define TP_printk(fmt, args...) "%s, %s\n", #fmt, #args
+
+#undef TP_fast_assign
+#define TP_fast_assign(args...) args
+
+#undef TRACE_EVENT
+#define TRACE_EVENT(call, proto, args, tstruct, print, func) \
+static int \
+ftrace_format_##call(struct trace_seq *s) \
+{ \
+ struct ftrace_raw_##call field; \
+ int ret; \
+ \
+ tstruct; \
+ \
+ trace_seq_printf(s, "\nprint fmt: " print); \
+ \
+ return ret; \
+}
+
#include <trace/trace_event_types.h>
diff --git a/kernel/trace/trace_events_stage_3.h b/kernel/trace/trace_events_stage_3.h
index 41b82b93c9c..8e398d86409 100644
--- a/kernel/trace/trace_events_stage_3.h
+++ b/kernel/trace/trace_events_stage_3.h
@@ -144,27 +144,15 @@ __attribute__((section("_ftrace_events"))) event_##call = { \
.unregfunc = ftrace_unreg_event_##call, \
}
-#undef TRACE_FIELD
-#define TRACE_FIELD(type, item, assign)\
- entry->item = assign;
-
-#undef TRACE_FIELD
-#define TRACE_FIELD(type, item, assign)\
- entry->item = assign;
-
-#undef TP_CMD
-#define TP_CMD(cmd...) cmd
-
-#undef TRACE_ENTRY
-#define TRACE_ENTRY entry
+#undef TRACE_EVENT_FORMAT
+#define TRACE_EVENT_FORMAT(call, proto, args, fmt, tstruct, raw) \
+ TRACE_FORMAT(call, PARAMS(proto), PARAMS(args), PARAMS(fmt))
-#undef TRACE_FIELD_SPECIAL
-#define TRACE_FIELD_SPECIAL(type_item, item, cmd) \
- cmd;
+#undef __entry
+#define __entry entry
-#undef TRACE_EVENT_FORMAT
-#define TRACE_EVENT_FORMAT(call, proto, args, fmt, tstruct, tpfmt) \
-_TRACE_FORMAT(call, PARAMS(proto), PARAMS(args), PARAMS(fmt)) \
+#undef TRACE_EVENT
+#define TRACE_EVENT(call, proto, args, tstruct, print, assign) \
\
static struct ftrace_event_call event_##call; \
\
@@ -185,7 +173,7 @@ static void ftrace_raw_event_##call(proto) \
return; \
entry = ring_buffer_event_data(event); \
\
- tstruct; \
+ assign; \
\
trace_current_buffer_unlock_commit(event, irq_flags, pc); \
} \
@@ -226,10 +214,8 @@ __attribute__((__aligned__(4))) \
__attribute__((section("_ftrace_events"))) event_##call = { \
.name = #call, \
.system = __stringify(TRACE_SYSTEM), \
- .regfunc = ftrace_reg_event_##call, \
- .unregfunc = ftrace_unreg_event_##call, \
.raw_init = ftrace_raw_init_event_##call, \
- .raw_reg = ftrace_raw_reg_event_##call, \
- .raw_unreg = ftrace_raw_unreg_event_##call, \
+ .regfunc = ftrace_raw_reg_event_##call, \
+ .unregfunc = ftrace_raw_unreg_event_##call, \
.show_format = ftrace_format_##call, \
}
diff --git a/kernel/trace/trace_export.c b/kernel/trace/trace_export.c
index e62bc10f810..23ae78430d5 100644
--- a/kernel/trace/trace_export.c
+++ b/kernel/trace/trace_export.c
@@ -15,7 +15,28 @@
#include "trace_output.h"
-#include "trace_format.h"
+
+#undef TRACE_STRUCT
+#define TRACE_STRUCT(args...) args
+
+#undef TRACE_FIELD
+#define TRACE_FIELD(type, item, assign) \
+ ret = trace_seq_printf(s, "\tfield:" #type " " #item ";\t" \
+ "offset:%u;\tsize:%u;\n", \
+ (unsigned int)offsetof(typeof(field), item), \
+ (unsigned int)sizeof(field.item)); \
+ if (!ret) \
+ return 0;
+
+
+#undef TRACE_FIELD_SPECIAL
+#define TRACE_FIELD_SPECIAL(type_item, item, cmd) \
+ ret = trace_seq_printf(s, "\tfield special:" #type_item ";\t" \
+ "offset:%u;\tsize:%u;\n", \
+ (unsigned int)offsetof(typeof(field), item), \
+ (unsigned int)sizeof(field.item)); \
+ if (!ret) \
+ return 0;
#undef TRACE_FIELD_ZERO_CHAR
#define TRACE_FIELD_ZERO_CHAR(item) \