#define for_each_tracing_cpu(cpu) \
for_each_cpu_mask(cpu, tracing_buffer_mask)
-/* dummy trace to disable tracing */
-static struct tracer no_tracer __read_mostly = {
- .name = "none",
-};
-
static int trace_alloc_page(void);
static int trace_free_page(void);
/* tracer_enabled is used to toggle activation of a tracer */
static int tracer_enabled = 1;
+/* function tracing enabled */
+int ftrace_function_enabled;
+
/*
* trace_nr_entries is the number of entries that is allocated
* for a buffer. Note, the number of entries is always rounded
/* trace_flags holds iter_ctrl options */
unsigned long trace_flags = TRACE_ITER_PRINT_PARENT;
+static notrace void no_trace_init(struct trace_array *tr)
+{
+ int cpu;
+
+ ftrace_function_enabled = 0;
+ if(tr->ctrl)
+ for_each_online_cpu(cpu)
+ tracing_reset(tr->data[cpu]);
+ tracer_enabled = 0;
+}
+
+/* dummy trace to disable tracing */
+static struct tracer no_tracer __read_mostly = {
+ .name = "none",
+ .init = no_trace_init
+};
+
+
/**
* trace_wake_up - wake up tasks waiting for trace input
*
trace_function(tr, data, ip, parent_ip, flags);
}
+#ifdef CONFIG_MMIOTRACE
+void __trace_mmiotrace_rw(struct trace_array *tr, struct trace_array_cpu *data,
+ struct mmiotrace_rw *rw)
+{
+ struct trace_entry *entry;
+ unsigned long irq_flags;
+
+ raw_local_irq_save(irq_flags);
+ __raw_spin_lock(&data->lock);
+
+ entry = tracing_get_trace_entry(tr, data);
+ tracing_generic_entry_update(entry, 0);
+ entry->type = TRACE_MMIO_RW;
+ entry->mmiorw = *rw;
+
+ __raw_spin_unlock(&data->lock);
+ raw_local_irq_restore(irq_flags);
+
+ trace_wake_up();
+}
+
+void __trace_mmiotrace_map(struct trace_array *tr, struct trace_array_cpu *data,
+ struct mmiotrace_map *map)
+{
+ struct trace_entry *entry;
+ unsigned long irq_flags;
+
+ raw_local_irq_save(irq_flags);
+ __raw_spin_lock(&data->lock);
+
+ entry = tracing_get_trace_entry(tr, data);
+ tracing_generic_entry_update(entry, 0);
+ entry->type = TRACE_MMIO_MAP;
+ entry->mmiomap = *map;
+
+ __raw_spin_unlock(&data->lock);
+ raw_local_irq_restore(irq_flags);
+
+ trace_wake_up();
+}
+#endif
+
void __trace_stack(struct trace_array *tr,
struct trace_array_cpu *data,
unsigned long flags,
long disabled;
int cpu;
- if (unlikely(!tracer_enabled))
+ if (unlikely(!ftrace_function_enabled))
+ return;
+
+ if (skip_trace(ip))
return;
local_irq_save(flags);
void tracing_start_function_trace(void)
{
+ ftrace_function_enabled = 0;
register_ftrace_function(&trace_ops);
+ if (tracer_enabled)
+ ftrace_function_enabled = 1;
}
void tracing_stop_function_trace(void)
{
+ ftrace_function_enabled = 0;
unregister_ftrace_function(&trace_ops);
}
#endif
static void *s_next(struct seq_file *m, void *v, loff_t *pos)
{
struct trace_iterator *iter = m->private;
- void *last_ent = iter->ent;
int i = (int)*pos;
void *ent;
iter->pos = *pos;
- if (last_ent && !ent)
- seq_puts(m, "\n\nvim:ft=help\n");
-
return ent;
}
"server",
#elif defined(CONFIG_PREEMPT_VOLUNTARY)
"desktop",
-#elif defined(CONFIG_PREEMPT_DESKTOP)
+#elif defined(CONFIG_PREEMPT)
"preempt",
#else
"unknown",
m->private = iter;
/* stop the trace while dumping */
- if (iter->tr->ctrl)
+ if (iter->tr->ctrl) {
tracer_enabled = 0;
+ ftrace_function_enabled = 0;
+ }
if (iter->trace && iter->trace->open)
iter->trace->open(iter);
iter->trace->close(iter);
/* reenable tracing if it was previously enabled */
- if (iter->tr->ctrl)
+ if (iter->tr->ctrl) {
tracer_enabled = 1;
+ /*
+ * It is safe to enable function tracing even if it
+ * isn't used
+ */
+ ftrace_function_enabled = 1;
+ }
mutex_unlock(&trace_types_lock);
seq_release(inode, file);
pr_warning("Could not create debugfs "
"'dyn_ftrace_total_info' entry\n");
#endif
+#ifdef CONFIG_SYSPROF_TRACER
+ init_tracer_sysprof_debugfs(d_tracer);
+#endif
}
static int trace_alloc_page(void)
}
max_tr.entries = global_trace.entries;
- pr_info("tracer: %d pages allocated for %ld",
- pages, trace_nr_entries);
- pr_info(" entries of %ld bytes\n", (long)TRACE_ENTRY_SIZE);
+ pr_info("tracer: %d pages allocated for %ld entries of %ld bytes\n",
+ pages, trace_nr_entries, (long)TRACE_ENTRY_SIZE);
pr_info(" actual entries %ld\n", global_trace.entries);
tracer_init_debugfs();