forked from Minki/linux
ftrace: change trace.c to use registered events
Impact: rework trace.c to use new event register API Almost every ftrace event has to implement its output display in trace.c through a different function. Some events did not handle all the formats (trace, latency-trace, raw, hex, binary), and this method does not scale well. This patch converts the format functions to use the event API to find the event and and print its format. Currently, we have a print function for trace, latency_trace, raw, hex and binary. A trace_nop_print is available if the event wants to avoid output on a particular format. Perhaps other tracers could use this in the future (like mmiotrace and function_graph). Signed-off-by: Steven Rostedt <srostedt@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
parent
f0868d1e23
commit
f633cef020
@ -1483,15 +1483,6 @@ lat_print_timestamp(struct trace_seq *s, u64 abs_usecs,
|
||||
trace_seq_puts(s, " : ");
|
||||
}
|
||||
|
||||
static const char state_to_char[] = TASK_STATE_TO_CHAR_STR;
|
||||
|
||||
static int task_state_char(unsigned long state)
|
||||
{
|
||||
int bit = state ? __ffs(state) + 1 : 0;
|
||||
|
||||
return bit < sizeof(state_to_char) - 1 ? state_to_char[bit] : '?';
|
||||
}
|
||||
|
||||
static void test_cpu_buff_start(struct trace_iterator *iter)
|
||||
{
|
||||
struct trace_seq *s = &iter->seq;
|
||||
@ -1515,14 +1506,14 @@ print_lat_fmt(struct trace_iterator *iter, unsigned int trace_idx, int cpu)
|
||||
struct trace_seq *s = &iter->seq;
|
||||
unsigned long sym_flags = (trace_flags & TRACE_ITER_SYM_MASK);
|
||||
struct trace_entry *next_entry;
|
||||
struct trace_event *event;
|
||||
unsigned long verbose = (trace_flags & TRACE_ITER_VERBOSE);
|
||||
struct trace_entry *entry = iter->ent;
|
||||
unsigned long abs_usecs;
|
||||
unsigned long rel_usecs;
|
||||
u64 next_ts;
|
||||
char *comm;
|
||||
int S, T;
|
||||
int i;
|
||||
int ret;
|
||||
|
||||
test_cpu_buff_start(iter);
|
||||
|
||||
@ -1547,94 +1538,16 @@ print_lat_fmt(struct trace_iterator *iter, unsigned int trace_idx, int cpu)
|
||||
lat_print_generic(s, entry, cpu);
|
||||
lat_print_timestamp(s, abs_usecs, rel_usecs);
|
||||
}
|
||||
switch (entry->type) {
|
||||
case TRACE_FN: {
|
||||
struct ftrace_entry *field;
|
||||
|
||||
trace_assign_type(field, entry);
|
||||
|
||||
seq_print_ip_sym(s, field->ip, sym_flags);
|
||||
trace_seq_puts(s, " (");
|
||||
seq_print_ip_sym(s, field->parent_ip, sym_flags);
|
||||
trace_seq_puts(s, ")\n");
|
||||
break;
|
||||
event = ftrace_find_event(entry->type);
|
||||
if (event && event->latency_trace) {
|
||||
ret = event->latency_trace(s, entry, sym_flags);
|
||||
if (ret)
|
||||
return ret;
|
||||
return TRACE_TYPE_HANDLED;
|
||||
}
|
||||
case TRACE_CTX:
|
||||
case TRACE_WAKE: {
|
||||
struct ctx_switch_entry *field;
|
||||
|
||||
trace_assign_type(field, entry);
|
||||
|
||||
T = task_state_char(field->next_state);
|
||||
S = task_state_char(field->prev_state);
|
||||
comm = trace_find_cmdline(field->next_pid);
|
||||
trace_seq_printf(s, " %5d:%3d:%c %s [%03d] %5d:%3d:%c %s\n",
|
||||
field->prev_pid,
|
||||
field->prev_prio,
|
||||
S, entry->type == TRACE_CTX ? "==>" : " +",
|
||||
field->next_cpu,
|
||||
field->next_pid,
|
||||
field->next_prio,
|
||||
T, comm);
|
||||
break;
|
||||
}
|
||||
case TRACE_SPECIAL: {
|
||||
struct special_entry *field;
|
||||
|
||||
trace_assign_type(field, entry);
|
||||
|
||||
trace_seq_printf(s, "# %ld %ld %ld\n",
|
||||
field->arg1,
|
||||
field->arg2,
|
||||
field->arg3);
|
||||
break;
|
||||
}
|
||||
case TRACE_STACK: {
|
||||
struct stack_entry *field;
|
||||
|
||||
trace_assign_type(field, entry);
|
||||
|
||||
for (i = 0; i < FTRACE_STACK_ENTRIES; i++) {
|
||||
if (i)
|
||||
trace_seq_puts(s, " <= ");
|
||||
seq_print_ip_sym(s, field->caller[i], sym_flags);
|
||||
}
|
||||
trace_seq_puts(s, "\n");
|
||||
break;
|
||||
}
|
||||
case TRACE_PRINT: {
|
||||
struct print_entry *field;
|
||||
|
||||
trace_assign_type(field, entry);
|
||||
|
||||
seq_print_ip_sym(s, field->ip, sym_flags);
|
||||
trace_seq_printf(s, ": %s", field->buf);
|
||||
break;
|
||||
}
|
||||
case TRACE_BRANCH: {
|
||||
struct trace_branch *field;
|
||||
|
||||
trace_assign_type(field, entry);
|
||||
|
||||
trace_seq_printf(s, "[%s] %s:%s:%d\n",
|
||||
field->correct ? " ok " : " MISS ",
|
||||
field->func,
|
||||
field->file,
|
||||
field->line);
|
||||
break;
|
||||
}
|
||||
case TRACE_USER_STACK: {
|
||||
struct userstack_entry *field;
|
||||
|
||||
trace_assign_type(field, entry);
|
||||
|
||||
seq_print_userip_objs(field, s, sym_flags);
|
||||
trace_seq_putc(s, '\n');
|
||||
break;
|
||||
}
|
||||
default:
|
||||
trace_seq_printf(s, "Unknown type %d\n", entry->type);
|
||||
}
|
||||
trace_seq_printf(s, "Unknown type %d\n", entry->type);
|
||||
return TRACE_TYPE_HANDLED;
|
||||
}
|
||||
|
||||
@ -1643,13 +1556,12 @@ static enum print_line_t print_trace_fmt(struct trace_iterator *iter)
|
||||
struct trace_seq *s = &iter->seq;
|
||||
unsigned long sym_flags = (trace_flags & TRACE_ITER_SYM_MASK);
|
||||
struct trace_entry *entry;
|
||||
struct trace_event *event;
|
||||
unsigned long usec_rem;
|
||||
unsigned long long t;
|
||||
unsigned long secs;
|
||||
char *comm;
|
||||
int ret;
|
||||
int S, T;
|
||||
int i;
|
||||
|
||||
entry = iter->ent;
|
||||
|
||||
@ -1671,127 +1583,17 @@ static enum print_line_t print_trace_fmt(struct trace_iterator *iter)
|
||||
if (!ret)
|
||||
return TRACE_TYPE_PARTIAL_LINE;
|
||||
|
||||
switch (entry->type) {
|
||||
case TRACE_FN: {
|
||||
struct ftrace_entry *field;
|
||||
|
||||
trace_assign_type(field, entry);
|
||||
|
||||
ret = seq_print_ip_sym(s, field->ip, sym_flags);
|
||||
if (!ret)
|
||||
return TRACE_TYPE_PARTIAL_LINE;
|
||||
if ((sym_flags & TRACE_ITER_PRINT_PARENT) &&
|
||||
field->parent_ip) {
|
||||
ret = trace_seq_printf(s, " <-");
|
||||
if (!ret)
|
||||
return TRACE_TYPE_PARTIAL_LINE;
|
||||
ret = seq_print_ip_sym(s,
|
||||
field->parent_ip,
|
||||
sym_flags);
|
||||
if (!ret)
|
||||
return TRACE_TYPE_PARTIAL_LINE;
|
||||
}
|
||||
ret = trace_seq_printf(s, "\n");
|
||||
if (!ret)
|
||||
return TRACE_TYPE_PARTIAL_LINE;
|
||||
break;
|
||||
event = ftrace_find_event(entry->type);
|
||||
if (event && event->trace) {
|
||||
ret = event->trace(s, entry, sym_flags);
|
||||
if (ret)
|
||||
return ret;
|
||||
return TRACE_TYPE_HANDLED;
|
||||
}
|
||||
case TRACE_CTX:
|
||||
case TRACE_WAKE: {
|
||||
struct ctx_switch_entry *field;
|
||||
ret = trace_seq_printf(s, "Unknown type %d\n", entry->type);
|
||||
if (!ret)
|
||||
return TRACE_TYPE_PARTIAL_LINE;
|
||||
|
||||
trace_assign_type(field, entry);
|
||||
|
||||
T = task_state_char(field->next_state);
|
||||
S = task_state_char(field->prev_state);
|
||||
ret = trace_seq_printf(s, " %5d:%3d:%c %s [%03d] %5d:%3d:%c\n",
|
||||
field->prev_pid,
|
||||
field->prev_prio,
|
||||
S,
|
||||
entry->type == TRACE_CTX ? "==>" : " +",
|
||||
field->next_cpu,
|
||||
field->next_pid,
|
||||
field->next_prio,
|
||||
T);
|
||||
if (!ret)
|
||||
return TRACE_TYPE_PARTIAL_LINE;
|
||||
break;
|
||||
}
|
||||
case TRACE_SPECIAL: {
|
||||
struct special_entry *field;
|
||||
|
||||
trace_assign_type(field, entry);
|
||||
|
||||
ret = trace_seq_printf(s, "# %ld %ld %ld\n",
|
||||
field->arg1,
|
||||
field->arg2,
|
||||
field->arg3);
|
||||
if (!ret)
|
||||
return TRACE_TYPE_PARTIAL_LINE;
|
||||
break;
|
||||
}
|
||||
case TRACE_STACK: {
|
||||
struct stack_entry *field;
|
||||
|
||||
trace_assign_type(field, entry);
|
||||
|
||||
for (i = 0; i < FTRACE_STACK_ENTRIES; i++) {
|
||||
if (i) {
|
||||
ret = trace_seq_puts(s, " <= ");
|
||||
if (!ret)
|
||||
return TRACE_TYPE_PARTIAL_LINE;
|
||||
}
|
||||
ret = seq_print_ip_sym(s, field->caller[i],
|
||||
sym_flags);
|
||||
if (!ret)
|
||||
return TRACE_TYPE_PARTIAL_LINE;
|
||||
}
|
||||
ret = trace_seq_puts(s, "\n");
|
||||
if (!ret)
|
||||
return TRACE_TYPE_PARTIAL_LINE;
|
||||
break;
|
||||
}
|
||||
case TRACE_PRINT: {
|
||||
struct print_entry *field;
|
||||
|
||||
trace_assign_type(field, entry);
|
||||
|
||||
seq_print_ip_sym(s, field->ip, sym_flags);
|
||||
trace_seq_printf(s, ": %s", field->buf);
|
||||
break;
|
||||
}
|
||||
case TRACE_GRAPH_RET: {
|
||||
return print_graph_function(iter);
|
||||
}
|
||||
case TRACE_GRAPH_ENT: {
|
||||
return print_graph_function(iter);
|
||||
}
|
||||
case TRACE_BRANCH: {
|
||||
struct trace_branch *field;
|
||||
|
||||
trace_assign_type(field, entry);
|
||||
|
||||
trace_seq_printf(s, "[%s] %s:%s:%d\n",
|
||||
field->correct ? " ok " : " MISS ",
|
||||
field->func,
|
||||
field->file,
|
||||
field->line);
|
||||
break;
|
||||
}
|
||||
case TRACE_USER_STACK: {
|
||||
struct userstack_entry *field;
|
||||
|
||||
trace_assign_type(field, entry);
|
||||
|
||||
ret = seq_print_userip_objs(field, s, sym_flags);
|
||||
if (!ret)
|
||||
return TRACE_TYPE_PARTIAL_LINE;
|
||||
ret = trace_seq_putc(s, '\n');
|
||||
if (!ret)
|
||||
return TRACE_TYPE_PARTIAL_LINE;
|
||||
break;
|
||||
}
|
||||
}
|
||||
return TRACE_TYPE_HANDLED;
|
||||
}
|
||||
|
||||
@ -1799,8 +1601,8 @@ static enum print_line_t print_raw_fmt(struct trace_iterator *iter)
|
||||
{
|
||||
struct trace_seq *s = &iter->seq;
|
||||
struct trace_entry *entry;
|
||||
struct trace_event *event;
|
||||
int ret;
|
||||
int S, T;
|
||||
|
||||
entry = iter->ent;
|
||||
|
||||
@ -1809,86 +1611,26 @@ static enum print_line_t print_raw_fmt(struct trace_iterator *iter)
|
||||
if (!ret)
|
||||
return TRACE_TYPE_PARTIAL_LINE;
|
||||
|
||||
switch (entry->type) {
|
||||
case TRACE_FN: {
|
||||
struct ftrace_entry *field;
|
||||
|
||||
trace_assign_type(field, entry);
|
||||
|
||||
ret = trace_seq_printf(s, "%x %x\n",
|
||||
field->ip,
|
||||
field->parent_ip);
|
||||
if (!ret)
|
||||
return TRACE_TYPE_PARTIAL_LINE;
|
||||
break;
|
||||
event = ftrace_find_event(entry->type);
|
||||
if (event && event->raw) {
|
||||
ret = event->raw(s, entry, 0);
|
||||
if (ret)
|
||||
return ret;
|
||||
return TRACE_TYPE_HANDLED;
|
||||
}
|
||||
case TRACE_CTX:
|
||||
case TRACE_WAKE: {
|
||||
struct ctx_switch_entry *field;
|
||||
ret = trace_seq_printf(s, "%d ?\n", entry->type);
|
||||
if (!ret)
|
||||
return TRACE_TYPE_PARTIAL_LINE;
|
||||
|
||||
trace_assign_type(field, entry);
|
||||
|
||||
T = task_state_char(field->next_state);
|
||||
S = entry->type == TRACE_WAKE ? '+' :
|
||||
task_state_char(field->prev_state);
|
||||
ret = trace_seq_printf(s, "%d %d %c %d %d %d %c\n",
|
||||
field->prev_pid,
|
||||
field->prev_prio,
|
||||
S,
|
||||
field->next_cpu,
|
||||
field->next_pid,
|
||||
field->next_prio,
|
||||
T);
|
||||
if (!ret)
|
||||
return TRACE_TYPE_PARTIAL_LINE;
|
||||
break;
|
||||
}
|
||||
case TRACE_SPECIAL:
|
||||
case TRACE_USER_STACK:
|
||||
case TRACE_STACK: {
|
||||
struct special_entry *field;
|
||||
|
||||
trace_assign_type(field, entry);
|
||||
|
||||
ret = trace_seq_printf(s, "# %ld %ld %ld\n",
|
||||
field->arg1,
|
||||
field->arg2,
|
||||
field->arg3);
|
||||
if (!ret)
|
||||
return TRACE_TYPE_PARTIAL_LINE;
|
||||
break;
|
||||
}
|
||||
case TRACE_PRINT: {
|
||||
struct print_entry *field;
|
||||
|
||||
trace_assign_type(field, entry);
|
||||
|
||||
trace_seq_printf(s, "# %lx %s", field->ip, field->buf);
|
||||
break;
|
||||
}
|
||||
}
|
||||
return TRACE_TYPE_HANDLED;
|
||||
}
|
||||
|
||||
#define SEQ_PUT_FIELD_RET(s, x) \
|
||||
do { \
|
||||
if (!trace_seq_putmem(s, &(x), sizeof(x))) \
|
||||
return 0; \
|
||||
} while (0)
|
||||
|
||||
#define SEQ_PUT_HEX_FIELD_RET(s, x) \
|
||||
do { \
|
||||
BUILD_BUG_ON(sizeof(x) > MAX_MEMHEX_BYTES); \
|
||||
if (!trace_seq_putmem_hex(s, &(x), sizeof(x))) \
|
||||
return 0; \
|
||||
} while (0)
|
||||
|
||||
static enum print_line_t print_hex_fmt(struct trace_iterator *iter)
|
||||
{
|
||||
struct trace_seq *s = &iter->seq;
|
||||
unsigned char newline = '\n';
|
||||
struct trace_entry *entry;
|
||||
int S, T;
|
||||
struct trace_event *event;
|
||||
|
||||
entry = iter->ent;
|
||||
|
||||
@ -1896,47 +1638,10 @@ static enum print_line_t print_hex_fmt(struct trace_iterator *iter)
|
||||
SEQ_PUT_HEX_FIELD_RET(s, iter->cpu);
|
||||
SEQ_PUT_HEX_FIELD_RET(s, iter->ts);
|
||||
|
||||
switch (entry->type) {
|
||||
case TRACE_FN: {
|
||||
struct ftrace_entry *field;
|
||||
event = ftrace_find_event(entry->type);
|
||||
if (event && event->hex)
|
||||
event->hex(s, entry, 0);
|
||||
|
||||
trace_assign_type(field, entry);
|
||||
|
||||
SEQ_PUT_HEX_FIELD_RET(s, field->ip);
|
||||
SEQ_PUT_HEX_FIELD_RET(s, field->parent_ip);
|
||||
break;
|
||||
}
|
||||
case TRACE_CTX:
|
||||
case TRACE_WAKE: {
|
||||
struct ctx_switch_entry *field;
|
||||
|
||||
trace_assign_type(field, entry);
|
||||
|
||||
T = task_state_char(field->next_state);
|
||||
S = entry->type == TRACE_WAKE ? '+' :
|
||||
task_state_char(field->prev_state);
|
||||
SEQ_PUT_HEX_FIELD_RET(s, field->prev_pid);
|
||||
SEQ_PUT_HEX_FIELD_RET(s, field->prev_prio);
|
||||
SEQ_PUT_HEX_FIELD_RET(s, S);
|
||||
SEQ_PUT_HEX_FIELD_RET(s, field->next_cpu);
|
||||
SEQ_PUT_HEX_FIELD_RET(s, field->next_pid);
|
||||
SEQ_PUT_HEX_FIELD_RET(s, field->next_prio);
|
||||
SEQ_PUT_HEX_FIELD_RET(s, T);
|
||||
break;
|
||||
}
|
||||
case TRACE_SPECIAL:
|
||||
case TRACE_USER_STACK:
|
||||
case TRACE_STACK: {
|
||||
struct special_entry *field;
|
||||
|
||||
trace_assign_type(field, entry);
|
||||
|
||||
SEQ_PUT_HEX_FIELD_RET(s, field->arg1);
|
||||
SEQ_PUT_HEX_FIELD_RET(s, field->arg2);
|
||||
SEQ_PUT_HEX_FIELD_RET(s, field->arg3);
|
||||
break;
|
||||
}
|
||||
}
|
||||
SEQ_PUT_FIELD_RET(s, newline);
|
||||
|
||||
return TRACE_TYPE_HANDLED;
|
||||
@ -1962,6 +1667,7 @@ static enum print_line_t print_bin_fmt(struct trace_iterator *iter)
|
||||
{
|
||||
struct trace_seq *s = &iter->seq;
|
||||
struct trace_entry *entry;
|
||||
struct trace_event *event;
|
||||
|
||||
entry = iter->ent;
|
||||
|
||||
@ -1969,43 +1675,11 @@ static enum print_line_t print_bin_fmt(struct trace_iterator *iter)
|
||||
SEQ_PUT_FIELD_RET(s, entry->cpu);
|
||||
SEQ_PUT_FIELD_RET(s, iter->ts);
|
||||
|
||||
switch (entry->type) {
|
||||
case TRACE_FN: {
|
||||
struct ftrace_entry *field;
|
||||
event = ftrace_find_event(entry->type);
|
||||
if (event && event->binary)
|
||||
event->binary(s, entry, 0);
|
||||
|
||||
trace_assign_type(field, entry);
|
||||
|
||||
SEQ_PUT_FIELD_RET(s, field->ip);
|
||||
SEQ_PUT_FIELD_RET(s, field->parent_ip);
|
||||
break;
|
||||
}
|
||||
case TRACE_CTX: {
|
||||
struct ctx_switch_entry *field;
|
||||
|
||||
trace_assign_type(field, entry);
|
||||
|
||||
SEQ_PUT_FIELD_RET(s, field->prev_pid);
|
||||
SEQ_PUT_FIELD_RET(s, field->prev_prio);
|
||||
SEQ_PUT_FIELD_RET(s, field->prev_state);
|
||||
SEQ_PUT_FIELD_RET(s, field->next_pid);
|
||||
SEQ_PUT_FIELD_RET(s, field->next_prio);
|
||||
SEQ_PUT_FIELD_RET(s, field->next_state);
|
||||
break;
|
||||
}
|
||||
case TRACE_SPECIAL:
|
||||
case TRACE_USER_STACK:
|
||||
case TRACE_STACK: {
|
||||
struct special_entry *field;
|
||||
|
||||
trace_assign_type(field, entry);
|
||||
|
||||
SEQ_PUT_FIELD_RET(s, field->arg1);
|
||||
SEQ_PUT_FIELD_RET(s, field->arg2);
|
||||
SEQ_PUT_FIELD_RET(s, field->arg3);
|
||||
break;
|
||||
}
|
||||
}
|
||||
return 1;
|
||||
return TRACE_TYPE_HANDLED;
|
||||
}
|
||||
|
||||
static int trace_empty(struct trace_iterator *iter)
|
||||
|
@ -14,7 +14,9 @@
|
||||
#include <linux/hash.h>
|
||||
#include <linux/fs.h>
|
||||
#include <asm/local.h>
|
||||
|
||||
#include "trace.h"
|
||||
#include "trace_output.h"
|
||||
|
||||
#ifdef CONFIG_BRANCH_TRACER
|
||||
|
||||
@ -142,6 +144,49 @@ static void branch_trace_reset(struct trace_array *tr)
|
||||
stop_branch_trace(tr);
|
||||
}
|
||||
|
||||
static int
|
||||
trace_print_print(struct trace_seq *s, struct trace_entry *entry, int flags)
|
||||
{
|
||||
struct print_entry *field;
|
||||
|
||||
trace_assign_type(field, entry);
|
||||
|
||||
if (seq_print_ip_sym(s, field->ip, flags))
|
||||
goto partial;
|
||||
|
||||
if (trace_seq_printf(s, ": %s", field->buf))
|
||||
goto partial;
|
||||
|
||||
partial:
|
||||
return TRACE_TYPE_PARTIAL_LINE;
|
||||
}
|
||||
|
||||
static int
|
||||
trace_branch_print(struct trace_seq *s, struct trace_entry *entry, int flags)
|
||||
{
|
||||
struct trace_branch *field;
|
||||
|
||||
trace_assign_type(field, entry);
|
||||
|
||||
if (trace_seq_printf(s, "[%s] %s:%s:%d\n",
|
||||
field->correct ? " ok " : " MISS ",
|
||||
field->func,
|
||||
field->file,
|
||||
field->line))
|
||||
return TRACE_TYPE_PARTIAL_LINE;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct trace_event trace_branch_event = {
|
||||
.type = TRACE_BRANCH,
|
||||
.trace = trace_branch_print,
|
||||
.latency_trace = trace_branch_print,
|
||||
.raw = trace_nop_print,
|
||||
.hex = trace_nop_print,
|
||||
.binary = trace_nop_print,
|
||||
};
|
||||
|
||||
struct tracer branch_trace __read_mostly =
|
||||
{
|
||||
.name = "branch",
|
||||
@ -154,6 +199,14 @@ struct tracer branch_trace __read_mostly =
|
||||
|
||||
__init static int init_branch_trace(void)
|
||||
{
|
||||
int ret;
|
||||
|
||||
ret = register_ftrace_event(&trace_branch_event);
|
||||
if (!ret) {
|
||||
printk(KERN_WARNING "Warning: could not register branch events\n");
|
||||
return 1;
|
||||
}
|
||||
|
||||
return register_tracer(&branch_trace);
|
||||
}
|
||||
|
||||
|
@ -286,6 +286,15 @@ seq_print_ip_sym(struct trace_seq *s, unsigned long ip, unsigned long sym_flags)
|
||||
return ret;
|
||||
}
|
||||
|
||||
static const char state_to_char[] = TASK_STATE_TO_CHAR_STR;
|
||||
|
||||
static int task_state_char(unsigned long state)
|
||||
{
|
||||
int bit = state ? __ffs(state) + 1 : 0;
|
||||
|
||||
return bit < sizeof(state_to_char) - 1 ? state_to_char[bit] : '?';
|
||||
}
|
||||
|
||||
/**
|
||||
* ftrace_find_event - find a registered event
|
||||
* @type: the type of event to look for
|
||||
@ -363,3 +372,461 @@ int unregister_ftrace_event(struct trace_event *event)
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* Standard events
|
||||
*/
|
||||
|
||||
int
|
||||
trace_nop_print(struct trace_seq *s, struct trace_entry *entry, int flags)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* TRACE_FN */
|
||||
static int
|
||||
trace_fn_latency(struct trace_seq *s, struct trace_entry *entry, int flags)
|
||||
{
|
||||
struct ftrace_entry *field;
|
||||
|
||||
trace_assign_type(field, entry);
|
||||
|
||||
if (!seq_print_ip_sym(s, field->ip, flags))
|
||||
goto partial;
|
||||
if (!trace_seq_puts(s, " ("))
|
||||
goto partial;
|
||||
if (!seq_print_ip_sym(s, field->parent_ip, flags))
|
||||
goto partial;
|
||||
if (!trace_seq_puts(s, ")\n"))
|
||||
goto partial;
|
||||
|
||||
return 0;
|
||||
|
||||
partial:
|
||||
return TRACE_TYPE_PARTIAL_LINE;
|
||||
}
|
||||
|
||||
static int
|
||||
trace_fn_trace(struct trace_seq *s, struct trace_entry *entry, int flags)
|
||||
{
|
||||
struct ftrace_entry *field;
|
||||
|
||||
trace_assign_type(field, entry);
|
||||
|
||||
if (!seq_print_ip_sym(s, field->ip, flags))
|
||||
goto partial;
|
||||
|
||||
if ((flags & TRACE_ITER_PRINT_PARENT) && field->parent_ip) {
|
||||
if (!trace_seq_printf(s, " <-"))
|
||||
goto partial;
|
||||
if (!seq_print_ip_sym(s,
|
||||
field->parent_ip,
|
||||
flags))
|
||||
goto partial;
|
||||
}
|
||||
if (!trace_seq_printf(s, "\n"))
|
||||
goto partial;
|
||||
|
||||
return 0;
|
||||
|
||||
partial:
|
||||
return TRACE_TYPE_PARTIAL_LINE;
|
||||
}
|
||||
|
||||
static int
|
||||
trace_fn_raw(struct trace_seq *s, struct trace_entry *entry, int flags)
|
||||
{
|
||||
struct ftrace_entry *field;
|
||||
|
||||
trace_assign_type(field, entry);
|
||||
|
||||
if (trace_seq_printf(s, "%x %x\n",
|
||||
field->ip,
|
||||
field->parent_ip))
|
||||
return TRACE_TYPE_PARTIAL_LINE;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int
|
||||
trace_fn_hex(struct trace_seq *s, struct trace_entry *entry, int flags)
|
||||
{
|
||||
struct ftrace_entry *field;
|
||||
|
||||
trace_assign_type(field, entry);
|
||||
|
||||
SEQ_PUT_HEX_FIELD_RET(s, field->ip);
|
||||
SEQ_PUT_HEX_FIELD_RET(s, field->parent_ip);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int
|
||||
trace_fn_bin(struct trace_seq *s, struct trace_entry *entry, int flags)
|
||||
{
|
||||
struct ftrace_entry *field;
|
||||
|
||||
trace_assign_type(field, entry);
|
||||
|
||||
SEQ_PUT_FIELD_RET(s, field->ip);
|
||||
SEQ_PUT_FIELD_RET(s, field->parent_ip);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct trace_event trace_fn_event = {
|
||||
.type = TRACE_FN,
|
||||
.trace = trace_fn_trace,
|
||||
.latency_trace = trace_fn_latency,
|
||||
.raw = trace_fn_raw,
|
||||
.hex = trace_fn_hex,
|
||||
.binary = trace_fn_bin,
|
||||
};
|
||||
|
||||
/* TRACE_CTX an TRACE_WAKE */
|
||||
static int
|
||||
trace_ctxwake_print(struct trace_seq *s, struct trace_entry *entry, int flags,
|
||||
char *delim)
|
||||
{
|
||||
struct ctx_switch_entry *field;
|
||||
char *comm;
|
||||
int S, T;
|
||||
|
||||
trace_assign_type(field, entry);
|
||||
|
||||
T = task_state_char(field->next_state);
|
||||
S = task_state_char(field->prev_state);
|
||||
comm = trace_find_cmdline(field->next_pid);
|
||||
if (trace_seq_printf(s, " %5d:%3d:%c %s [%03d] %5d:%3d:%c %s\n",
|
||||
field->prev_pid,
|
||||
field->prev_prio,
|
||||
S, delim,
|
||||
field->next_cpu,
|
||||
field->next_pid,
|
||||
field->next_prio,
|
||||
T, comm))
|
||||
return TRACE_TYPE_PARTIAL_LINE;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int
|
||||
trace_ctx_print(struct trace_seq *s, struct trace_entry *entry, int flags)
|
||||
{
|
||||
return trace_ctxwake_print(s, entry, flags, "==>");
|
||||
}
|
||||
|
||||
static int
|
||||
trace_wake_print(struct trace_seq *s, struct trace_entry *entry, int flags)
|
||||
{
|
||||
return trace_ctxwake_print(s, entry, flags, " +");
|
||||
}
|
||||
|
||||
static int
|
||||
trace_ctxwake_raw(struct trace_seq *s, struct trace_entry *entry, int flags,
|
||||
char S)
|
||||
{
|
||||
struct ctx_switch_entry *field;
|
||||
int T;
|
||||
|
||||
trace_assign_type(field, entry);
|
||||
|
||||
if (!S)
|
||||
task_state_char(field->prev_state);
|
||||
T = task_state_char(field->next_state);
|
||||
if (trace_seq_printf(s, "%d %d %c %d %d %d %c\n",
|
||||
field->prev_pid,
|
||||
field->prev_prio,
|
||||
S,
|
||||
field->next_cpu,
|
||||
field->next_pid,
|
||||
field->next_prio,
|
||||
T))
|
||||
return TRACE_TYPE_PARTIAL_LINE;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int
|
||||
trace_ctx_raw(struct trace_seq *s, struct trace_entry *entry, int flags)
|
||||
{
|
||||
return trace_ctxwake_raw(s, entry, flags, 0);
|
||||
}
|
||||
|
||||
static int
|
||||
trace_wake_raw(struct trace_seq *s, struct trace_entry *entry, int flags)
|
||||
{
|
||||
return trace_ctxwake_raw(s, entry, flags, '+');
|
||||
}
|
||||
|
||||
|
||||
static int
|
||||
trace_ctxwake_hex(struct trace_seq *s, struct trace_entry *entry, int flags,
|
||||
char S)
|
||||
{
|
||||
struct ctx_switch_entry *field;
|
||||
int T;
|
||||
|
||||
trace_assign_type(field, entry);
|
||||
|
||||
if (!S)
|
||||
task_state_char(field->prev_state);
|
||||
T = task_state_char(field->next_state);
|
||||
|
||||
SEQ_PUT_HEX_FIELD_RET(s, field->prev_pid);
|
||||
SEQ_PUT_HEX_FIELD_RET(s, field->prev_prio);
|
||||
SEQ_PUT_HEX_FIELD_RET(s, S);
|
||||
SEQ_PUT_HEX_FIELD_RET(s, field->next_cpu);
|
||||
SEQ_PUT_HEX_FIELD_RET(s, field->next_pid);
|
||||
SEQ_PUT_HEX_FIELD_RET(s, field->next_prio);
|
||||
SEQ_PUT_HEX_FIELD_RET(s, T);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int
|
||||
trace_ctx_hex(struct trace_seq *s, struct trace_entry *entry, int flags)
|
||||
{
|
||||
return trace_ctxwake_hex(s, entry, flags, 0);
|
||||
}
|
||||
|
||||
static int
|
||||
trace_wake_hex(struct trace_seq *s, struct trace_entry *entry, int flags)
|
||||
{
|
||||
return trace_ctxwake_hex(s, entry, flags, '+');
|
||||
}
|
||||
|
||||
static int
|
||||
trace_ctxwake_bin(struct trace_seq *s, struct trace_entry *entry, int flags)
|
||||
{
|
||||
struct ctx_switch_entry *field;
|
||||
|
||||
trace_assign_type(field, entry);
|
||||
|
||||
SEQ_PUT_FIELD_RET(s, field->prev_pid);
|
||||
SEQ_PUT_FIELD_RET(s, field->prev_prio);
|
||||
SEQ_PUT_FIELD_RET(s, field->prev_state);
|
||||
SEQ_PUT_FIELD_RET(s, field->next_pid);
|
||||
SEQ_PUT_FIELD_RET(s, field->next_prio);
|
||||
SEQ_PUT_FIELD_RET(s, field->next_state);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct trace_event trace_ctx_event = {
|
||||
.type = TRACE_CTX,
|
||||
.trace = trace_ctx_print,
|
||||
.latency_trace = trace_ctx_print,
|
||||
.raw = trace_ctx_raw,
|
||||
.hex = trace_ctx_hex,
|
||||
.binary = trace_ctxwake_bin,
|
||||
};
|
||||
|
||||
static struct trace_event trace_wake_event = {
|
||||
.type = TRACE_WAKE,
|
||||
.trace = trace_wake_print,
|
||||
.latency_trace = trace_wake_print,
|
||||
.raw = trace_wake_raw,
|
||||
.hex = trace_wake_hex,
|
||||
.binary = trace_ctxwake_bin,
|
||||
};
|
||||
|
||||
/* TRACE_SPECIAL */
|
||||
static int
|
||||
trace_special_print(struct trace_seq *s, struct trace_entry *entry, int flags)
|
||||
{
|
||||
struct special_entry *field;
|
||||
|
||||
trace_assign_type(field, entry);
|
||||
|
||||
if (trace_seq_printf(s, "# %ld %ld %ld\n",
|
||||
field->arg1,
|
||||
field->arg2,
|
||||
field->arg3))
|
||||
return TRACE_TYPE_PARTIAL_LINE;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int
|
||||
trace_special_hex(struct trace_seq *s, struct trace_entry *entry, int flags)
|
||||
{
|
||||
struct special_entry *field;
|
||||
|
||||
trace_assign_type(field, entry);
|
||||
|
||||
SEQ_PUT_HEX_FIELD_RET(s, field->arg1);
|
||||
SEQ_PUT_HEX_FIELD_RET(s, field->arg2);
|
||||
SEQ_PUT_HEX_FIELD_RET(s, field->arg3);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int
|
||||
trace_special_bin(struct trace_seq *s, struct trace_entry *entry, int flags)
|
||||
{
|
||||
struct special_entry *field;
|
||||
|
||||
trace_assign_type(field, entry);
|
||||
|
||||
SEQ_PUT_FIELD_RET(s, field->arg1);
|
||||
SEQ_PUT_FIELD_RET(s, field->arg2);
|
||||
SEQ_PUT_FIELD_RET(s, field->arg3);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct trace_event trace_special_event = {
|
||||
.type = TRACE_SPECIAL,
|
||||
.trace = trace_special_print,
|
||||
.latency_trace = trace_special_print,
|
||||
.raw = trace_special_print,
|
||||
.hex = trace_special_hex,
|
||||
.binary = trace_special_bin,
|
||||
};
|
||||
|
||||
/* TRACE_STACK */
|
||||
|
||||
static int
|
||||
trace_stack_print(struct trace_seq *s, struct trace_entry *entry, int flags)
|
||||
{
|
||||
struct stack_entry *field;
|
||||
int i;
|
||||
|
||||
trace_assign_type(field, entry);
|
||||
|
||||
for (i = 0; i < FTRACE_STACK_ENTRIES; i++) {
|
||||
if (i) {
|
||||
if (trace_seq_puts(s, " <= "))
|
||||
goto partial;
|
||||
|
||||
if (seq_print_ip_sym(s, field->caller[i], flags))
|
||||
goto partial;
|
||||
}
|
||||
if (trace_seq_puts(s, "\n"))
|
||||
goto partial;
|
||||
}
|
||||
|
||||
return 0;
|
||||
|
||||
partial:
|
||||
return TRACE_TYPE_PARTIAL_LINE;
|
||||
}
|
||||
|
||||
static struct trace_event trace_stack_event = {
|
||||
.type = TRACE_STACK,
|
||||
.trace = trace_stack_print,
|
||||
.latency_trace = trace_stack_print,
|
||||
.raw = trace_special_print,
|
||||
.hex = trace_special_hex,
|
||||
.binary = trace_special_bin,
|
||||
};
|
||||
|
||||
/* TRACE_USER_STACK */
|
||||
static int
|
||||
trace_user_stack_print(struct trace_seq *s, struct trace_entry *entry,
|
||||
int flags)
|
||||
{
|
||||
struct userstack_entry *field;
|
||||
|
||||
trace_assign_type(field, entry);
|
||||
|
||||
if (seq_print_userip_objs(field, s, flags))
|
||||
goto partial;
|
||||
|
||||
if (trace_seq_putc(s, '\n'))
|
||||
goto partial;
|
||||
|
||||
return 0;
|
||||
|
||||
partial:
|
||||
return TRACE_TYPE_PARTIAL_LINE;
|
||||
}
|
||||
|
||||
static struct trace_event trace_user_stack_event = {
|
||||
.type = TRACE_USER_STACK,
|
||||
.trace = trace_user_stack_print,
|
||||
.latency_trace = trace_user_stack_print,
|
||||
.raw = trace_special_print,
|
||||
.hex = trace_special_hex,
|
||||
.binary = trace_special_bin,
|
||||
};
|
||||
|
||||
/* TRACE_PRINT */
|
||||
static int
|
||||
trace_print_print(struct trace_seq *s, struct trace_entry *entry, int flags)
|
||||
{
|
||||
struct print_entry *field;
|
||||
|
||||
trace_assign_type(field, entry);
|
||||
|
||||
if (seq_print_ip_sym(s, field->ip, flags))
|
||||
goto partial;
|
||||
|
||||
if (trace_seq_printf(s, ": %s", field->buf))
|
||||
goto partial;
|
||||
|
||||
return 0;
|
||||
|
||||
partial:
|
||||
return TRACE_TYPE_PARTIAL_LINE;
|
||||
}
|
||||
|
||||
static int
|
||||
trace_print_raw(struct trace_seq *s, struct trace_entry *entry, int flags)
|
||||
{
|
||||
struct print_entry *field;
|
||||
|
||||
trace_assign_type(field, entry);
|
||||
|
||||
if (seq_print_ip_sym(s, field->ip, flags))
|
||||
goto partial;
|
||||
|
||||
if (trace_seq_printf(s, "# %lx %s", field->ip, field->buf))
|
||||
goto partial;
|
||||
|
||||
return 0;
|
||||
|
||||
partial:
|
||||
return TRACE_TYPE_PARTIAL_LINE;
|
||||
}
|
||||
|
||||
static struct trace_event trace_print_event = {
|
||||
.type = TRACE_PRINT,
|
||||
.trace = trace_print_print,
|
||||
.latency_trace = trace_print_print,
|
||||
.raw = trace_print_raw,
|
||||
.hex = trace_nop_print,
|
||||
.binary = trace_nop_print,
|
||||
};
|
||||
|
||||
static struct trace_event *events[] __initdata = {
|
||||
&trace_fn_event,
|
||||
&trace_ctx_event,
|
||||
&trace_wake_event,
|
||||
&trace_special_event,
|
||||
&trace_stack_event,
|
||||
&trace_user_stack_event,
|
||||
&trace_print_event,
|
||||
NULL
|
||||
};
|
||||
|
||||
__init static int init_events(void)
|
||||
{
|
||||
struct trace_event *event;
|
||||
int i, ret;
|
||||
|
||||
for (i = 0; events[i]; i++) {
|
||||
event = events[i];
|
||||
|
||||
ret = register_ftrace_event(event);
|
||||
if (!ret) {
|
||||
printk(KERN_WARNING "event %d failed to register\n",
|
||||
event->type);
|
||||
WARN_ON_ONCE(1);
|
||||
}
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
device_initcall(init_events);
|
||||
|
@ -36,8 +36,24 @@ struct trace_event *ftrace_find_event(int type);
|
||||
int register_ftrace_event(struct trace_event *event);
|
||||
int unregister_ftrace_event(struct trace_event *event);
|
||||
|
||||
int
|
||||
trace_nop_print(struct trace_seq *s, struct trace_entry *entry, int flags);
|
||||
|
||||
#define MAX_MEMHEX_BYTES 8
|
||||
#define HEX_CHARS (MAX_MEMHEX_BYTES*2 + 1)
|
||||
|
||||
#define SEQ_PUT_FIELD_RET(s, x) \
|
||||
do { \
|
||||
if (!trace_seq_putmem(s, &(x), sizeof(x))) \
|
||||
return 0; \
|
||||
} while (0)
|
||||
|
||||
#define SEQ_PUT_HEX_FIELD_RET(s, x) \
|
||||
do { \
|
||||
BUILD_BUG_ON(sizeof(x) > MAX_MEMHEX_BYTES); \
|
||||
if (!trace_seq_putmem_hex(s, &(x), sizeof(x))) \
|
||||
return 0; \
|
||||
} while (0)
|
||||
|
||||
#endif
|
||||
|
||||
|
Loading…
Reference in New Issue
Block a user