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Diffstat (limited to 'kernel/trace/trace_selftest.c')
-rw-r--r--kernel/trace/trace_selftest.c133
1 files changed, 106 insertions, 27 deletions
diff --git a/kernel/trace/trace_selftest.c b/kernel/trace/trace_selftest.c
index bc8e80a86bc..38856ba78a9 100644
--- a/kernel/trace/trace_selftest.c
+++ b/kernel/trace/trace_selftest.c
@@ -1,5 +1,6 @@
/* Include in trace.c */
+#include <linux/stringify.h>
#include <linux/kthread.h>
#include <linux/delay.h>
@@ -9,11 +10,12 @@ static inline int trace_valid_entry(struct trace_entry *entry)
case TRACE_FN:
case TRACE_CTX:
case TRACE_WAKE:
- case TRACE_CONT:
case TRACE_STACK:
case TRACE_PRINT:
case TRACE_SPECIAL:
case TRACE_BRANCH:
+ case TRACE_GRAPH_ENT:
+ case TRACE_GRAPH_RET:
return 1;
}
return 0;
@@ -99,9 +101,6 @@ static inline void warn_failed_init_tracer(struct tracer *trace, int init_ret)
#ifdef CONFIG_DYNAMIC_FTRACE
-#define __STR(x) #x
-#define STR(x) __STR(x)
-
/* Test dynamic code modification and ftrace filters */
int trace_selftest_startup_dynamic_tracing(struct tracer *trace,
struct trace_array *tr,
@@ -125,17 +124,17 @@ int trace_selftest_startup_dynamic_tracing(struct tracer *trace,
func();
/*
- * Some archs *cough*PowerPC*cough* add charachters to the
+ * Some archs *cough*PowerPC*cough* add characters to the
* start of the function names. We simply put a '*' to
- * accomodate them.
+ * accommodate them.
*/
- func_name = "*" STR(DYN_FTRACE_TEST_NAME);
+ func_name = "*" __stringify(DYN_FTRACE_TEST_NAME);
/* filter only on our function */
ftrace_set_filter(func_name, strlen(func_name), 1);
/* enable tracing */
- ret = trace->init(tr);
+ ret = tracer_init(trace, tr);
if (ret) {
warn_failed_init_tracer(trace, ret);
goto out;
@@ -209,7 +208,7 @@ trace_selftest_startup_function(struct tracer *trace, struct trace_array *tr)
ftrace_enabled = 1;
tracer_enabled = 1;
- ret = trace->init(tr);
+ ret = tracer_init(trace, tr);
if (ret) {
warn_failed_init_tracer(trace, ret);
goto out;
@@ -247,6 +246,54 @@ trace_selftest_startup_function(struct tracer *trace, struct trace_array *tr)
}
#endif /* CONFIG_FUNCTION_TRACER */
+
+#ifdef CONFIG_FUNCTION_GRAPH_TRACER
+/*
+ * Pretty much the same than for the function tracer from which the selftest
+ * has been borrowed.
+ */
+int
+trace_selftest_startup_function_graph(struct tracer *trace,
+ struct trace_array *tr)
+{
+ int ret;
+ unsigned long count;
+
+ ret = tracer_init(trace, tr);
+ if (ret) {
+ warn_failed_init_tracer(trace, ret);
+ goto out;
+ }
+
+ /* Sleep for a 1/10 of a second */
+ msleep(100);
+
+ tracing_stop();
+
+ /* check the trace buffer */
+ ret = trace_test_buffer(tr, &count);
+
+ trace->reset(tr);
+ tracing_start();
+
+ if (!ret && !count) {
+ printk(KERN_CONT ".. no entries found ..");
+ ret = -1;
+ goto out;
+ }
+
+ /* Don't test dynamic tracing, the function tracer already did */
+
+out:
+ /* Stop it if we failed */
+ if (ret)
+ ftrace_graph_stop();
+
+ return ret;
+}
+#endif /* CONFIG_FUNCTION_GRAPH_TRACER */
+
+
#ifdef CONFIG_IRQSOFF_TRACER
int
trace_selftest_startup_irqsoff(struct tracer *trace, struct trace_array *tr)
@@ -256,7 +303,7 @@ trace_selftest_startup_irqsoff(struct tracer *trace, struct trace_array *tr)
int ret;
/* start the tracing */
- ret = trace->init(tr);
+ ret = tracer_init(trace, tr);
if (ret) {
warn_failed_init_tracer(trace, ret);
return ret;
@@ -268,6 +315,14 @@ trace_selftest_startup_irqsoff(struct tracer *trace, struct trace_array *tr)
local_irq_disable();
udelay(100);
local_irq_enable();
+
+ /*
+ * Stop the tracer to avoid a warning subsequent
+ * to buffer flipping failure because tracing_stop()
+ * disables the tr and max buffers, making flipping impossible
+ * in case of parallels max irqs off latencies.
+ */
+ trace->stop(tr);
/* stop the tracing. */
tracing_stop();
/* check both trace buffers */
@@ -310,7 +365,7 @@ trace_selftest_startup_preemptoff(struct tracer *trace, struct trace_array *tr)
}
/* start the tracing */
- ret = trace->init(tr);
+ ret = tracer_init(trace, tr);
if (ret) {
warn_failed_init_tracer(trace, ret);
return ret;
@@ -322,6 +377,14 @@ trace_selftest_startup_preemptoff(struct tracer *trace, struct trace_array *tr)
preempt_disable();
udelay(100);
preempt_enable();
+
+ /*
+ * Stop the tracer to avoid a warning subsequent
+ * to buffer flipping failure because tracing_stop()
+ * disables the tr and max buffers, making flipping impossible
+ * in case of parallels max preempt off latencies.
+ */
+ trace->stop(tr);
/* stop the tracing. */
tracing_stop();
/* check both trace buffers */
@@ -364,10 +427,10 @@ trace_selftest_startup_preemptirqsoff(struct tracer *trace, struct trace_array *
}
/* start the tracing */
- ret = trace->init(tr);
+ ret = tracer_init(trace, tr);
if (ret) {
warn_failed_init_tracer(trace, ret);
- goto out;
+ goto out_no_start;
}
/* reset the max latency */
@@ -381,31 +444,35 @@ trace_selftest_startup_preemptirqsoff(struct tracer *trace, struct trace_array *
/* reverse the order of preempt vs irqs */
local_irq_enable();
+ /*
+ * Stop the tracer to avoid a warning subsequent
+ * to buffer flipping failure because tracing_stop()
+ * disables the tr and max buffers, making flipping impossible
+ * in case of parallels max irqs/preempt off latencies.
+ */
+ trace->stop(tr);
/* stop the tracing. */
tracing_stop();
/* check both trace buffers */
ret = trace_test_buffer(tr, NULL);
- if (ret) {
- tracing_start();
+ if (ret)
goto out;
- }
ret = trace_test_buffer(&max_tr, &count);
- if (ret) {
- tracing_start();
+ if (ret)
goto out;
- }
if (!ret && !count) {
printk(KERN_CONT ".. no entries found ..");
ret = -1;
- tracing_start();
goto out;
}
/* do the test by disabling interrupts first this time */
tracing_max_latency = 0;
tracing_start();
+ trace->start(tr);
+
preempt_disable();
local_irq_disable();
udelay(100);
@@ -413,6 +480,7 @@ trace_selftest_startup_preemptirqsoff(struct tracer *trace, struct trace_array *
/* reverse the order of preempt vs irqs */
local_irq_enable();
+ trace->stop(tr);
/* stop the tracing. */
tracing_stop();
/* check both trace buffers */
@@ -428,9 +496,10 @@ trace_selftest_startup_preemptirqsoff(struct tracer *trace, struct trace_array *
goto out;
}
- out:
- trace->reset(tr);
+out:
tracing_start();
+out_no_start:
+ trace->reset(tr);
tracing_max_latency = save_max;
return ret;
@@ -496,7 +565,7 @@ trace_selftest_startup_wakeup(struct tracer *trace, struct trace_array *tr)
wait_for_completion(&isrt);
/* start the tracing */
- ret = trace->init(tr);
+ ret = tracer_init(trace, tr);
if (ret) {
warn_failed_init_tracer(trace, ret);
return ret;
@@ -557,7 +626,7 @@ trace_selftest_startup_sched_switch(struct tracer *trace, struct trace_array *tr
int ret;
/* start the tracing */
- ret = trace->init(tr);
+ ret = tracer_init(trace, tr);
if (ret) {
warn_failed_init_tracer(trace, ret);
return ret;
@@ -589,10 +658,10 @@ trace_selftest_startup_sysprof(struct tracer *trace, struct trace_array *tr)
int ret;
/* start the tracing */
- ret = trace->init(tr);
+ ret = tracer_init(trace, tr);
if (ret) {
warn_failed_init_tracer(trace, ret);
- return 0;
+ return ret;
}
/* Sleep for a 1/10 of a second */
@@ -604,6 +673,11 @@ trace_selftest_startup_sysprof(struct tracer *trace, struct trace_array *tr)
trace->reset(tr);
tracing_start();
+ if (!ret && !count) {
+ printk(KERN_CONT ".. no entries found ..");
+ ret = -1;
+ }
+
return ret;
}
#endif /* CONFIG_SYSPROF_TRACER */
@@ -616,7 +690,7 @@ trace_selftest_startup_branch(struct tracer *trace, struct trace_array *tr)
int ret;
/* start the tracing */
- ret = trace->init(tr);
+ ret = tracer_init(trace, tr);
if (ret) {
warn_failed_init_tracer(trace, ret);
return ret;
@@ -631,6 +705,11 @@ trace_selftest_startup_branch(struct tracer *trace, struct trace_array *tr)
trace->reset(tr);
tracing_start();
+ if (!ret && !count) {
+ printk(KERN_CONT ".. no entries found ..");
+ ret = -1;
+ }
+
return ret;
}
#endif /* CONFIG_BRANCH_TRACER */
generated by cgit v1.2.3 (git 2.25.1) at 2025-01-24 05:56:28 +0000