* NEED_RESCED - reschedule is requested
* HARDIRQ - inside an interrupt handler
* SOFTIRQ - inside a softirq handler
+ * CONT - multiple entries hold the trace item
*/
enum trace_flag_type {
TRACE_FLAG_IRQS_OFF = 0x01,
TRACE_FLAG_NEED_RESCHED = 0x02,
TRACE_FLAG_HARDIRQ = 0x04,
TRACE_FLAG_SOFTIRQ = 0x08,
+ TRACE_FLAG_CONT = 0x10,
};
/*
pc = preempt_count();
- entry->preempt_count = pc & 0xff;
- entry->pid = (tsk) ? tsk->pid : 0;
- entry->t = ftrace_now(raw_smp_processor_id());
- entry->flags = (irqs_disabled_flags(flags) ? TRACE_FLAG_IRQS_OFF : 0) |
+ entry->field.preempt_count = pc & 0xff;
+ entry->field.pid = (tsk) ? tsk->pid : 0;
+ entry->field.t = ftrace_now(raw_smp_processor_id());
+ entry->field.flags =
+ (irqs_disabled_flags(flags) ? TRACE_FLAG_IRQS_OFF : 0) |
((pc & HARDIRQ_MASK) ? TRACE_FLAG_HARDIRQ : 0) |
((pc & SOFTIRQ_MASK) ? TRACE_FLAG_SOFTIRQ : 0) |
(need_resched() ? TRACE_FLAG_NEED_RESCHED : 0);
raw_local_irq_save(irq_flags);
__raw_spin_lock(&data->lock);
- entry = tracing_get_trace_entry(tr, data);
+ entry = tracing_get_trace_entry(tr, data);
tracing_generic_entry_update(entry, flags);
- entry->type = TRACE_FN;
- entry->fn.ip = ip;
- entry->fn.parent_ip = parent_ip;
+ entry->type = TRACE_FN;
+ entry->field.fn.ip = ip;
+ entry->field.fn.parent_ip = parent_ip;
__raw_spin_unlock(&data->lock);
raw_local_irq_restore(irq_flags);
}
raw_local_irq_save(irq_flags);
__raw_spin_lock(&data->lock);
- entry = tracing_get_trace_entry(tr, data);
+ entry = tracing_get_trace_entry(tr, data);
tracing_generic_entry_update(entry, 0);
- entry->type = TRACE_MMIO_RW;
- entry->mmiorw = *rw;
+ entry->type = TRACE_MMIO_RW;
+ entry->field.mmiorw = *rw;
__raw_spin_unlock(&data->lock);
raw_local_irq_restore(irq_flags);
raw_local_irq_save(irq_flags);
__raw_spin_lock(&data->lock);
- entry = tracing_get_trace_entry(tr, data);
+ entry = tracing_get_trace_entry(tr, data);
tracing_generic_entry_update(entry, 0);
- entry->type = TRACE_MMIO_MAP;
- entry->mmiomap = *map;
+ entry->type = TRACE_MMIO_MAP;
+ entry->field.mmiomap = *map;
__raw_spin_unlock(&data->lock);
raw_local_irq_restore(irq_flags);
tracing_generic_entry_update(entry, flags);
entry->type = TRACE_STACK;
- memset(&entry->stack, 0, sizeof(entry->stack));
+ memset(&entry->field.stack, 0, sizeof(entry->field.stack));
trace.nr_entries = 0;
trace.max_entries = FTRACE_STACK_ENTRIES;
trace.skip = skip;
- trace.entries = entry->stack.caller;
+ trace.entries = entry->field.stack.caller;
save_stack_trace(&trace);
}
raw_local_irq_save(irq_flags);
__raw_spin_lock(&data->lock);
- entry = tracing_get_trace_entry(tr, data);
+ entry = tracing_get_trace_entry(tr, data);
tracing_generic_entry_update(entry, 0);
- entry->type = TRACE_SPECIAL;
- entry->special.arg1 = arg1;
- entry->special.arg2 = arg2;
- entry->special.arg3 = arg3;
+ entry->type = TRACE_SPECIAL;
+ entry->field.special.arg1 = arg1;
+ entry->field.special.arg2 = arg2;
+ entry->field.special.arg3 = arg3;
__trace_stack(tr, data, irq_flags, 4);
__raw_spin_unlock(&data->lock);
raw_local_irq_restore(irq_flags);
raw_local_irq_save(irq_flags);
__raw_spin_lock(&data->lock);
- entry = tracing_get_trace_entry(tr, data);
+ entry = tracing_get_trace_entry(tr, data);
tracing_generic_entry_update(entry, flags);
- entry->type = TRACE_CTX;
- entry->ctx.prev_pid = prev->pid;
- entry->ctx.prev_prio = prev->prio;
- entry->ctx.prev_state = prev->state;
- entry->ctx.next_pid = next->pid;
- entry->ctx.next_prio = next->prio;
- entry->ctx.next_state = next->state;
+ entry->type = TRACE_CTX;
+ entry->field.ctx.prev_pid = prev->pid;
+ entry->field.ctx.prev_prio = prev->prio;
+ entry->field.ctx.prev_state = prev->state;
+ entry->field.ctx.next_pid = next->pid;
+ entry->field.ctx.next_prio = next->prio;
+ entry->field.ctx.next_state = next->state;
__trace_stack(tr, data, flags, 5);
__raw_spin_unlock(&data->lock);
raw_local_irq_restore(irq_flags);
entry = tracing_get_trace_entry(tr, data);
tracing_generic_entry_update(entry, flags);
entry->type = TRACE_WAKE;
- entry->ctx.prev_pid = curr->pid;
- entry->ctx.prev_prio = curr->prio;
- entry->ctx.prev_state = curr->state;
- entry->ctx.next_pid = wakee->pid;
- entry->ctx.next_prio = wakee->prio;
- entry->ctx.next_state = wakee->state;
+ entry->field.ctx.prev_pid = curr->pid;
+ entry->field.ctx.prev_prio = curr->prio;
+ entry->field.ctx.prev_state = curr->state;
+ entry->field.ctx.next_pid = wakee->pid;
+ entry->field.ctx.next_prio = wakee->prio;
+ entry->field.ctx.next_state = wakee->state;
__trace_stack(tr, data, flags, 6);
__raw_spin_unlock(&data->lock);
raw_local_irq_restore(irq_flags);
TRACE_FILE_LAT_FMT = 1,
};
+/* Return the current entry. */
static struct trace_entry *
trace_entry_idx(struct trace_array *tr, struct trace_array_cpu *data,
struct trace_iterator *iter, int cpu)
return &array[iter->next_page_idx[cpu]];
}
+/* Increment the index counter of an iterator by one */
+static void trace_iterator_increment(struct trace_iterator *iter, int cpu)
+{
+ iter->idx++;
+ iter->next_idx[cpu]++;
+ iter->next_page_idx[cpu]++;
+
+ if (iter->next_page_idx[cpu] >= ENTRIES_PER_PAGE) {
+ struct trace_array_cpu *data = iter->tr->data[cpu];
+
+ iter->next_page_idx[cpu] = 0;
+ iter->next_page[cpu] =
+ trace_next_list(data, iter->next_page[cpu]);
+ }
+}
+
static struct trace_entry *
-find_next_entry(struct trace_iterator *iter, int *ent_cpu)
+trace_entry_next(struct trace_array *tr, struct trace_array_cpu *data,
+ struct trace_iterator *iter, int cpu)
+{
+ struct list_head *next_page;
+ struct trace_entry *ent;
+ int idx, next_idx, next_page_idx;
+
+ ent = trace_entry_idx(tr, tr->data[cpu], iter, cpu);
+
+ if (likely(!ent || ent->type != TRACE_CONT))
+ return ent;
+
+ /* save the iterator details */
+ idx = iter->idx;
+ next_idx = iter->next_idx[cpu];
+ next_page_idx = iter->next_page_idx[cpu];
+ next_page = iter->next_page[cpu];
+
+ /* find a real entry */
+ do {
+ trace_iterator_increment(iter, cpu);
+ ent = trace_entry_idx(tr, tr->data[cpu], iter, cpu);
+ } while (ent && ent->type != TRACE_CONT);
+
+ /* reset the iterator */
+ iter->idx = idx;
+ iter->next_idx[cpu] = next_idx;
+ iter->next_page_idx[cpu] = next_page_idx;
+ iter->next_page[cpu] = next_page;
+
+ return ent;
+}
+
+static struct trace_entry *
+__find_next_entry(struct trace_iterator *iter, int *ent_cpu, int inc)
{
struct trace_array *tr = iter->tr;
struct trace_entry *ent, *next = NULL;
for_each_tracing_cpu(cpu) {
if (!head_page(tr->data[cpu]))
continue;
+
ent = trace_entry_idx(tr, tr->data[cpu], iter, cpu);
+
+ if (ent && ent->type == TRACE_CONT) {
+ struct trace_array_cpu *data = tr->data[cpu];
+
+ if (!inc)
+ ent = trace_entry_next(tr, data, iter, cpu);
+ else {
+ while (ent && ent->type == TRACE_CONT) {
+ trace_iterator_increment(iter, cpu);
+ ent = trace_entry_idx(tr, tr->data[cpu],
+ iter, cpu);
+ }
+ }
+ }
+
/*
* Pick the entry with the smallest timestamp:
*/
- if (ent && (!next || ent->t < next->t)) {
+ if (ent && (!next || ent->field.t < next->field.t)) {
next = ent;
next_cpu = cpu;
}
return next;
}
-static void trace_iterator_increment(struct trace_iterator *iter)
+/* Find the next real entry, without updating the iterator itself */
+static struct trace_entry *
+find_next_entry(struct trace_iterator *iter, int *ent_cpu)
{
- iter->idx++;
- iter->next_idx[iter->cpu]++;
- iter->next_page_idx[iter->cpu]++;
+ return __find_next_entry(iter, ent_cpu, 0);
+}
- if (iter->next_page_idx[iter->cpu] >= ENTRIES_PER_PAGE) {
- struct trace_array_cpu *data = iter->tr->data[iter->cpu];
+/* Find the next real entry, and increment the iterator to the next entry */
+static void *find_next_entry_inc(struct trace_iterator *iter)
+{
+ struct trace_entry *next;
+ int next_cpu = -1;
- iter->next_page_idx[iter->cpu] = 0;
- iter->next_page[iter->cpu] =
- trace_next_list(data, iter->next_page[iter->cpu]);
- }
+ next = __find_next_entry(iter, &next_cpu, 1);
+
+ iter->prev_ent = iter->ent;
+ iter->prev_cpu = iter->cpu;
+
+ iter->ent = next;
+ iter->cpu = next_cpu;
+
+ if (next)
+ trace_iterator_increment(iter, iter->cpu);
+
+ return next ? iter : NULL;
}
static void trace_consume(struct trace_iterator *iter)
{
struct trace_array_cpu *data = iter->tr->data[iter->cpu];
+ struct trace_entry *ent;
+ again:
data->trace_tail_idx++;
if (data->trace_tail_idx >= ENTRIES_PER_PAGE) {
data->trace_tail = trace_next_page(data, data->trace_tail);
if (data->trace_head == data->trace_tail &&
data->trace_head_idx == data->trace_tail_idx)
data->trace_idx = 0;
-}
-static void *find_next_entry_inc(struct trace_iterator *iter)
-{
- struct trace_entry *next;
- int next_cpu = -1;
-
- next = find_next_entry(iter, &next_cpu);
-
- iter->prev_ent = iter->ent;
- iter->prev_cpu = iter->cpu;
-
- iter->ent = next;
- iter->cpu = next_cpu;
-
- if (next)
- trace_iterator_increment(iter);
-
- return next ? iter : NULL;
+ ent = trace_entry_idx(iter->tr, iter->tr->data[iter->cpu],
+ iter, iter->cpu);
+ if (ent && ent->type == TRACE_CONT)
+ goto again;
}
static void *s_next(struct seq_file *m, void *v, loff_t *pos)
static void
lat_print_generic(struct trace_seq *s, struct trace_entry *entry, int cpu)
{
+ struct trace_field *field = &entry->field;
int hardirq, softirq;
char *comm;
- comm = trace_find_cmdline(entry->pid);
+ comm = trace_find_cmdline(field->pid);
- trace_seq_printf(s, "%8.8s-%-5d ", comm, entry->pid);
+ trace_seq_printf(s, "%8.8s-%-5d ", comm, field->pid);
trace_seq_printf(s, "%d", cpu);
trace_seq_printf(s, "%c%c",
- (entry->flags & TRACE_FLAG_IRQS_OFF) ? 'd' : '.',
- ((entry->flags & TRACE_FLAG_NEED_RESCHED) ? 'N' : '.'));
+ (field->flags & TRACE_FLAG_IRQS_OFF) ? 'd' : '.',
+ ((field->flags & TRACE_FLAG_NEED_RESCHED) ? 'N' : '.'));
- hardirq = entry->flags & TRACE_FLAG_HARDIRQ;
- softirq = entry->flags & TRACE_FLAG_SOFTIRQ;
+ hardirq = field->flags & TRACE_FLAG_HARDIRQ;
+ softirq = field->flags & TRACE_FLAG_SOFTIRQ;
if (hardirq && softirq) {
trace_seq_putc(s, 'H');
} else {
}
}
- if (entry->preempt_count)
- trace_seq_printf(s, "%x", entry->preempt_count);
+ if (field->preempt_count)
+ trace_seq_printf(s, "%x", field->preempt_count);
else
trace_seq_puts(s, ".");
}
static const char state_to_char[] = TASK_STATE_TO_CHAR_STR;
+static void
+trace_seq_print_cont(struct trace_seq *s, struct trace_iterator *iter)
+{
+ struct trace_array *tr = iter->tr;
+ struct trace_array_cpu *data = tr->data[iter->cpu];
+ struct trace_entry *ent;
+
+ ent = trace_entry_idx(tr, data, iter, iter->cpu);
+ if (!ent || ent->type != TRACE_CONT) {
+ trace_seq_putc(s, '\n');
+ return;
+ }
+
+ do {
+ trace_seq_printf(s, "%s", ent->cont.buf);
+ trace_iterator_increment(iter, iter->cpu);
+ ent = trace_entry_idx(tr, data, iter, iter->cpu);
+ } while (ent && ent->type == TRACE_CONT);
+}
+
static int
print_lat_fmt(struct trace_iterator *iter, unsigned int trace_idx, int cpu)
{
struct trace_entry *next_entry = find_next_entry(iter, NULL);
unsigned long verbose = (trace_flags & TRACE_ITER_VERBOSE);
struct trace_entry *entry = iter->ent;
+ struct trace_field *field = &entry->field;
unsigned long abs_usecs;
unsigned long rel_usecs;
char *comm;
if (!next_entry)
next_entry = entry;
- rel_usecs = ns2usecs(next_entry->t - entry->t);
- abs_usecs = ns2usecs(entry->t - iter->tr->time_start);
+
+ if (entry->type == TRACE_CONT)
+ return 1;
+
+ rel_usecs = ns2usecs(next_entry->field.t - entry->field.t);
+ abs_usecs = ns2usecs(entry->field.t - iter->tr->time_start);
if (verbose) {
- comm = trace_find_cmdline(entry->pid);
+ comm = trace_find_cmdline(field->pid);
trace_seq_printf(s, "%16s %5d %d %d %08x %08x [%08lx]"
" %ld.%03ldms (+%ld.%03ldms): ",
comm,
- entry->pid, cpu, entry->flags,
- entry->preempt_count, trace_idx,
- ns2usecs(entry->t),
+ field->pid, cpu, field->flags,
+ field->preempt_count, trace_idx,
+ ns2usecs(field->t),
abs_usecs/1000,
abs_usecs % 1000, rel_usecs/1000,
rel_usecs % 1000);
}
switch (entry->type) {
case TRACE_FN:
- seq_print_ip_sym(s, entry->fn.ip, sym_flags);
+ seq_print_ip_sym(s, field->fn.ip, sym_flags);
trace_seq_puts(s, " (");
- if (kretprobed(entry->fn.parent_ip))
+ if (kretprobed(field->fn.parent_ip))
trace_seq_puts(s, KRETPROBE_MSG);
else
- seq_print_ip_sym(s, entry->fn.parent_ip, sym_flags);
+ seq_print_ip_sym(s, field->fn.parent_ip, sym_flags);
trace_seq_puts(s, ")\n");
break;
case TRACE_CTX:
case TRACE_WAKE:
- T = entry->ctx.next_state < sizeof(state_to_char) ?
- state_to_char[entry->ctx.next_state] : 'X';
+ T = field->ctx.next_state < sizeof(state_to_char) ?
+ state_to_char[field->ctx.next_state] : 'X';
- state = entry->ctx.prev_state ? __ffs(entry->ctx.prev_state) + 1 : 0;
+ state = field->ctx.prev_state ?
+ __ffs(field->ctx.prev_state) + 1 : 0;
S = state < sizeof(state_to_char) - 1 ? state_to_char[state] : 'X';
- comm = trace_find_cmdline(entry->ctx.next_pid);
+ comm = trace_find_cmdline(field->ctx.next_pid);
trace_seq_printf(s, " %5d:%3d:%c %s %5d:%3d:%c %s\n",
- entry->ctx.prev_pid,
- entry->ctx.prev_prio,
+ field->ctx.prev_pid,
+ field->ctx.prev_prio,
S, entry->type == TRACE_CTX ? "==>" : " +",
- entry->ctx.next_pid,
- entry->ctx.next_prio,
+ field->ctx.next_pid,
+ field->ctx.next_prio,
T, comm);
break;
case TRACE_SPECIAL:
trace_seq_printf(s, "# %ld %ld %ld\n",
- entry->special.arg1,
- entry->special.arg2,
- entry->special.arg3);
+ field->special.arg1,
+ field->special.arg2,
+ field->special.arg3);
break;
case TRACE_STACK:
for (i = 0; i < FTRACE_STACK_ENTRIES; i++) {
if (i)
trace_seq_puts(s, " <= ");
- seq_print_ip_sym(s, entry->stack.caller[i], sym_flags);
+ seq_print_ip_sym(s, field->stack.caller[i], sym_flags);
}
trace_seq_puts(s, "\n");
break;
+ case TRACE_PRINT:
+ seq_print_ip_sym(s, field->print.ip, sym_flags);
+ trace_seq_printf(s, ": %s", field->print.buf);
+ if (field->flags && TRACE_FLAG_CONT)
+ trace_seq_print_cont(s, iter);
+ break;
default:
trace_seq_printf(s, "Unknown type %d\n", entry->type);
}
struct trace_seq *s = &iter->seq;
unsigned long sym_flags = (trace_flags & TRACE_ITER_SYM_MASK);
struct trace_entry *entry;
+ struct trace_field *field;
unsigned long usec_rem;
unsigned long long t;
unsigned long secs;
entry = iter->ent;
- comm = trace_find_cmdline(iter->ent->pid);
+ if (entry->type == TRACE_CONT)
+ return 1;
+
+ field = &entry->field;
+
+ comm = trace_find_cmdline(iter->ent->field.pid);
- t = ns2usecs(entry->t);
+ t = ns2usecs(field->t);
usec_rem = do_div(t, 1000000ULL);
secs = (unsigned long)t;
- ret = trace_seq_printf(s, "%16s-%-5d ", comm, entry->pid);
+ ret = trace_seq_printf(s, "%16s-%-5d ", comm, field->pid);
if (!ret)
return 0;
ret = trace_seq_printf(s, "[%02d] ", iter->cpu);
switch (entry->type) {
case TRACE_FN:
- ret = seq_print_ip_sym(s, entry->fn.ip, sym_flags);
+ ret = seq_print_ip_sym(s, field->fn.ip, sym_flags);
if (!ret)
return 0;
if ((sym_flags & TRACE_ITER_PRINT_PARENT) &&
- entry->fn.parent_ip) {
+ field->fn.parent_ip) {
ret = trace_seq_printf(s, " <-");
if (!ret)
return 0;
- if (kretprobed(entry->fn.parent_ip))
+ if (kretprobed(field->fn.parent_ip))
ret = trace_seq_puts(s, KRETPROBE_MSG);
else
- ret = seq_print_ip_sym(s, entry->fn.parent_ip,
+ ret = seq_print_ip_sym(s,
+ field->fn.parent_ip,
sym_flags);
if (!ret)
return 0;
break;
case TRACE_CTX:
case TRACE_WAKE:
- S = entry->ctx.prev_state < sizeof(state_to_char) ?
- state_to_char[entry->ctx.prev_state] : 'X';
- T = entry->ctx.next_state < sizeof(state_to_char) ?
- state_to_char[entry->ctx.next_state] : 'X';
+ S = field->ctx.prev_state < sizeof(state_to_char) ?
+ state_to_char[field->ctx.prev_state] : 'X';
+ T = field->ctx.next_state < sizeof(state_to_char) ?
+ state_to_char[field->ctx.next_state] : 'X';
ret = trace_seq_printf(s, " %5d:%3d:%c %s %5d:%3d:%c\n",
- entry->ctx.prev_pid,
- entry->ctx.prev_prio,
+ field->ctx.prev_pid,
+ field->ctx.prev_prio,
S,
entry->type == TRACE_CTX ? "==>" : " +",
- entry->ctx.next_pid,
- entry->ctx.next_prio,
+ field->ctx.next_pid,
+ field->ctx.next_prio,
T);
if (!ret)
return 0;
break;
case TRACE_SPECIAL:
ret = trace_seq_printf(s, "# %ld %ld %ld\n",
- entry->special.arg1,
- entry->special.arg2,
- entry->special.arg3);
+ field->special.arg1,
+ field->special.arg2,
+ field->special.arg3);
if (!ret)
return 0;
break;
if (!ret)
return 0;
}
- ret = seq_print_ip_sym(s, entry->stack.caller[i],
+ ret = seq_print_ip_sym(s, field->stack.caller[i],
sym_flags);
if (!ret)
return 0;
if (!ret)
return 0;
break;
+ case TRACE_PRINT:
+ seq_print_ip_sym(s, field->print.ip, sym_flags);
+ trace_seq_printf(s, ": %s", field->print.buf);
+ if (field->flags && TRACE_FLAG_CONT)
+ trace_seq_print_cont(s, iter);
+ break;
}
return 1;
}
{
struct trace_seq *s = &iter->seq;
struct trace_entry *entry;
+ struct trace_field *field;
int ret;
int S, T;
entry = iter->ent;
+ if (entry->type == TRACE_CONT)
+ return 1;
+
+ field = &entry->field;
+
ret = trace_seq_printf(s, "%d %d %llu ",
- entry->pid, iter->cpu, entry->t);
+ field->pid, iter->cpu, field->t);
if (!ret)
return 0;
switch (entry->type) {
case TRACE_FN:
ret = trace_seq_printf(s, "%x %x\n",
- entry->fn.ip, entry->fn.parent_ip);
+ field->fn.ip,
+ field->fn.parent_ip);
if (!ret)
return 0;
break;
case TRACE_CTX:
case TRACE_WAKE:
- S = entry->ctx.prev_state < sizeof(state_to_char) ?
- state_to_char[entry->ctx.prev_state] : 'X';
- T = entry->ctx.next_state < sizeof(state_to_char) ?
- state_to_char[entry->ctx.next_state] : 'X';
+ S = field->ctx.prev_state < sizeof(state_to_char) ?
+ state_to_char[field->ctx.prev_state] : 'X';
+ T = field->ctx.next_state < sizeof(state_to_char) ?
+ state_to_char[field->ctx.next_state] : 'X';
if (entry->type == TRACE_WAKE)
S = '+';
ret = trace_seq_printf(s, "%d %d %c %d %d %c\n",
- entry->ctx.prev_pid,
- entry->ctx.prev_prio,
+ field->ctx.prev_pid,
+ field->ctx.prev_prio,
S,
- entry->ctx.next_pid,
- entry->ctx.next_prio,
+ field->ctx.next_pid,
+ field->ctx.next_prio,
T);
if (!ret)
return 0;
case TRACE_SPECIAL:
case TRACE_STACK:
ret = trace_seq_printf(s, "# %ld %ld %ld\n",
- entry->special.arg1,
- entry->special.arg2,
- entry->special.arg3);
+ field->special.arg1,
+ field->special.arg2,
+ field->special.arg3);
if (!ret)
return 0;
break;
+ case TRACE_PRINT:
+ trace_seq_printf(s, "# %lx %s",
+ field->print.ip, field->print.buf);
+ if (field->flags && TRACE_FLAG_CONT)
+ trace_seq_print_cont(s, iter);
+ break;
}
return 1;
}
struct trace_seq *s = &iter->seq;
unsigned char newline = '\n';
struct trace_entry *entry;
+ struct trace_field *field;
int S, T;
entry = iter->ent;
- SEQ_PUT_HEX_FIELD_RET(s, entry->pid);
+ if (entry->type == TRACE_CONT)
+ return 1;
+
+ field = &entry->field;
+
+ SEQ_PUT_HEX_FIELD_RET(s, field->pid);
SEQ_PUT_HEX_FIELD_RET(s, iter->cpu);
- SEQ_PUT_HEX_FIELD_RET(s, entry->t);
+ SEQ_PUT_HEX_FIELD_RET(s, field->t);
switch (entry->type) {
case TRACE_FN:
- SEQ_PUT_HEX_FIELD_RET(s, entry->fn.ip);
- SEQ_PUT_HEX_FIELD_RET(s, entry->fn.parent_ip);
+ SEQ_PUT_HEX_FIELD_RET(s, field->fn.ip);
+ SEQ_PUT_HEX_FIELD_RET(s, field->fn.parent_ip);
break;
case TRACE_CTX:
case TRACE_WAKE:
- S = entry->ctx.prev_state < sizeof(state_to_char) ?
- state_to_char[entry->ctx.prev_state] : 'X';
- T = entry->ctx.next_state < sizeof(state_to_char) ?
- state_to_char[entry->ctx.next_state] : 'X';
+ S = field->ctx.prev_state < sizeof(state_to_char) ?
+ state_to_char[field->ctx.prev_state] : 'X';
+ T = field->ctx.next_state < sizeof(state_to_char) ?
+ state_to_char[field->ctx.next_state] : 'X';
if (entry->type == TRACE_WAKE)
S = '+';
- SEQ_PUT_HEX_FIELD_RET(s, entry->ctx.prev_pid);
- SEQ_PUT_HEX_FIELD_RET(s, entry->ctx.prev_prio);
+ SEQ_PUT_HEX_FIELD_RET(s, field->ctx.prev_pid);
+ SEQ_PUT_HEX_FIELD_RET(s, field->ctx.prev_prio);
SEQ_PUT_HEX_FIELD_RET(s, S);
- SEQ_PUT_HEX_FIELD_RET(s, entry->ctx.next_pid);
- SEQ_PUT_HEX_FIELD_RET(s, entry->ctx.next_prio);
- SEQ_PUT_HEX_FIELD_RET(s, entry->fn.parent_ip);
+ SEQ_PUT_HEX_FIELD_RET(s, field->ctx.next_pid);
+ SEQ_PUT_HEX_FIELD_RET(s, field->ctx.next_prio);
SEQ_PUT_HEX_FIELD_RET(s, T);
break;
case TRACE_SPECIAL:
case TRACE_STACK:
- SEQ_PUT_HEX_FIELD_RET(s, entry->special.arg1);
- SEQ_PUT_HEX_FIELD_RET(s, entry->special.arg2);
- SEQ_PUT_HEX_FIELD_RET(s, entry->special.arg3);
+ SEQ_PUT_HEX_FIELD_RET(s, field->special.arg1);
+ SEQ_PUT_HEX_FIELD_RET(s, field->special.arg2);
+ SEQ_PUT_HEX_FIELD_RET(s, field->special.arg3);
break;
}
SEQ_PUT_FIELD_RET(s, newline);
{
struct trace_seq *s = &iter->seq;
struct trace_entry *entry;
+ struct trace_field *field;
entry = iter->ent;
- SEQ_PUT_FIELD_RET(s, entry->pid);
- SEQ_PUT_FIELD_RET(s, entry->cpu);
- SEQ_PUT_FIELD_RET(s, entry->t);
+ if (entry->type == TRACE_CONT)
+ return 1;
+
+ field = &entry->field;
+
+ SEQ_PUT_FIELD_RET(s, field->pid);
+ SEQ_PUT_FIELD_RET(s, field->cpu);
+ SEQ_PUT_FIELD_RET(s, field->t);
switch (entry->type) {
case TRACE_FN:
- SEQ_PUT_FIELD_RET(s, entry->fn.ip);
- SEQ_PUT_FIELD_RET(s, entry->fn.parent_ip);
+ SEQ_PUT_FIELD_RET(s, field->fn.ip);
+ SEQ_PUT_FIELD_RET(s, field->fn.parent_ip);
break;
case TRACE_CTX:
- SEQ_PUT_FIELD_RET(s, entry->ctx.prev_pid);
- SEQ_PUT_FIELD_RET(s, entry->ctx.prev_prio);
- SEQ_PUT_FIELD_RET(s, entry->ctx.prev_state);
- SEQ_PUT_FIELD_RET(s, entry->ctx.next_pid);
- SEQ_PUT_FIELD_RET(s, entry->ctx.next_prio);
- SEQ_PUT_FIELD_RET(s, entry->ctx.next_state);
+ SEQ_PUT_FIELD_RET(s, field->ctx.prev_pid);
+ SEQ_PUT_FIELD_RET(s, field->ctx.prev_prio);
+ SEQ_PUT_FIELD_RET(s, field->ctx.prev_state);
+ SEQ_PUT_FIELD_RET(s, field->ctx.next_pid);
+ SEQ_PUT_FIELD_RET(s, field->ctx.next_prio);
+ SEQ_PUT_FIELD_RET(s, field->ctx.next_state);
break;
case TRACE_SPECIAL:
case TRACE_STACK:
- SEQ_PUT_FIELD_RET(s, entry->special.arg1);
- SEQ_PUT_FIELD_RET(s, entry->special.arg2);
- SEQ_PUT_FIELD_RET(s, entry->special.arg3);
+ SEQ_PUT_FIELD_RET(s, field->special.arg1);
+ SEQ_PUT_FIELD_RET(s, field->special.arg2);
+ SEQ_PUT_FIELD_RET(s, field->special.arg3);
break;
}
return 1;
#endif
}
+#define TRACE_BUF_SIZE 1024
+#define TRACE_PRINT_BUF_SIZE \
+ (sizeof(struct trace_field) - offsetof(struct trace_field, print.buf))
+#define TRACE_CONT_BUF_SIZE sizeof(struct trace_field)
+
+/**
+ * ftrace_printk - printf formatting in the ftrace buffer
+ * @fmt - the printf format for printing.
+ *
+ * Note: __ftrace_printk is an internal function for ftrace_printk and
+ * the @ip is passed in via the ftrace_printk macro.
+ *
+ * This function allows a kernel developer to debug fast path sections
+ * that printk is not appropriate for. By scattering in various
+ * printk like tracing in the code, a developer can quickly see
+ * where problems are occurring.
+ *
+ * This is intended as a debugging tool for the developer only.
+ * Please reframe from leaving ftrace_printks scattered around in
+ * your code.
+ */
+int __ftrace_printk(unsigned long ip, const char *fmt, ...)
+{
+ struct trace_array *tr = &global_trace;
+ static DEFINE_SPINLOCK(trace_buf_lock);
+ static char trace_buf[TRACE_BUF_SIZE];
+ struct trace_array_cpu *data;
+ struct trace_entry *entry;
+ unsigned long flags;
+ long disabled;
+ va_list ap;
+ int cpu, len = 0, write, written = 0;
+
+ if (likely(!ftrace_function_enabled))
+ return 0;
+
+ local_irq_save(flags);
+ cpu = raw_smp_processor_id();
+ data = tr->data[cpu];
+ disabled = atomic_inc_return(&data->disabled);
+
+ if (unlikely(disabled != 1 || !ftrace_function_enabled))
+ goto out;
+
+ spin_lock(&trace_buf_lock);
+ va_start(ap, fmt);
+ len = vsnprintf(trace_buf, TRACE_BUF_SIZE, fmt, ap);
+ va_end(ap);
+
+ len = min(len, TRACE_BUF_SIZE-1);
+ trace_buf[len] = 0;
+
+ __raw_spin_lock(&data->lock);
+ entry = tracing_get_trace_entry(tr, data);
+ tracing_generic_entry_update(entry, flags);
+ entry->type = TRACE_PRINT;
+ entry->field.print.ip = ip;
+
+ write = min(len, (int)(TRACE_PRINT_BUF_SIZE-1));
+
+ memcpy(&entry->field.print.buf, trace_buf, write);
+ entry->field.print.buf[write] = 0;
+ written = write;
+
+ if (written != len)
+ entry->field.flags |= TRACE_FLAG_CONT;
+
+ while (written != len) {
+ entry = tracing_get_trace_entry(tr, data);
+
+ entry->type = TRACE_CONT;
+ write = min(len - written, (int)(TRACE_CONT_BUF_SIZE-1));
+ memcpy(&entry->cont.buf, trace_buf+written, write);
+ entry->cont.buf[write] = 0;
+ written += write;
+ }
+ __raw_spin_unlock(&data->lock);
+
+ spin_unlock(&trace_buf_lock);
+
+ out:
+ atomic_dec(&data->disabled);
+ local_irq_restore(flags);
+
+ return len;
+}
+EXPORT_SYMBOL_GPL(__ftrace_printk);
+
static int trace_alloc_page(void)
{
struct trace_array_cpu *data;
projects / deliverable / linux.git / blobdiff