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Diffstat (limited to 'kernel/trace/trace_selftest.c')
-rw-r--r--kernel/trace/trace_selftest.c74
1 files changed, 33 insertions, 41 deletions
diff --git a/kernel/trace/trace_selftest.c b/kernel/trace/trace_selftest.c
index 47623169a81..2901e3b8859 100644
--- a/kernel/trace/trace_selftest.c
+++ b/kernel/trace/trace_selftest.c
@@ -21,13 +21,13 @@ static inline int trace_valid_entry(struct trace_entry *entry)
return 0;
}
-static int trace_test_buffer_cpu(struct trace_array *tr, int cpu)
+static int trace_test_buffer_cpu(struct trace_buffer *buf, int cpu)
{
struct ring_buffer_event *event;
struct trace_entry *entry;
unsigned int loops = 0;
- while ((event = ring_buffer_consume(tr->buffer, cpu, NULL, NULL))) {
+ while ((event = ring_buffer_consume(buf->buffer, cpu, NULL, NULL))) {
entry = ring_buffer_event_data(event);
/*
@@ -58,7 +58,7 @@ static int trace_test_buffer_cpu(struct trace_array *tr, int cpu)
* Test the trace buffer to see if all the elements
* are still sane.
*/
-static int trace_test_buffer(struct trace_array *tr, unsigned long *count)
+static int trace_test_buffer(struct trace_buffer *buf, unsigned long *count)
{
unsigned long flags, cnt = 0;
int cpu, ret = 0;
@@ -67,7 +67,7 @@ static int trace_test_buffer(struct trace_array *tr, unsigned long *count)
local_irq_save(flags);
arch_spin_lock(&ftrace_max_lock);
- cnt = ring_buffer_entries(tr->buffer);
+ cnt = ring_buffer_entries(buf->buffer);
/*
* The trace_test_buffer_cpu runs a while loop to consume all data.
@@ -78,7 +78,7 @@ static int trace_test_buffer(struct trace_array *tr, unsigned long *count)
*/
tracing_off();
for_each_possible_cpu(cpu) {
- ret = trace_test_buffer_cpu(tr, cpu);
+ ret = trace_test_buffer_cpu(buf, cpu);
if (ret)
break;
}
@@ -355,7 +355,7 @@ int trace_selftest_startup_dynamic_tracing(struct tracer *trace,
msleep(100);
/* we should have nothing in the buffer */
- ret = trace_test_buffer(tr, &count);
+ ret = trace_test_buffer(&tr->trace_buffer, &count);
if (ret)
goto out;
@@ -376,7 +376,7 @@ int trace_selftest_startup_dynamic_tracing(struct tracer *trace,
ftrace_enabled = 0;
/* check the trace buffer */
- ret = trace_test_buffer(tr, &count);
+ ret = trace_test_buffer(&tr->trace_buffer, &count);
tracing_start();
/* we should only have one item */
@@ -415,7 +415,8 @@ static void trace_selftest_test_recursion_func(unsigned long ip,
* The ftrace infrastructure should provide the recursion
* protection. If not, this will crash the kernel!
*/
- trace_selftest_recursion_cnt++;
+ if (trace_selftest_recursion_cnt++ > 10)
+ return;
DYN_FTRACE_TEST_NAME();
}
@@ -452,7 +453,6 @@ trace_selftest_function_recursion(void)
char *func_name;
int len;
int ret;
- int cnt;
/* The previous test PASSED */
pr_cont("PASSED\n");
@@ -510,19 +510,10 @@ trace_selftest_function_recursion(void)
unregister_ftrace_function(&test_recsafe_probe);
- /*
- * If arch supports all ftrace features, and no other task
- * was on the list, we should be fine.
- */
- if (!ftrace_nr_registered_ops() && !FTRACE_FORCE_LIST_FUNC)
- cnt = 2; /* Should have recursed */
- else
- cnt = 1;
-
ret = -1;
- if (trace_selftest_recursion_cnt != cnt) {
- pr_cont("*callback not called expected %d times (%d)* ",
- cnt, trace_selftest_recursion_cnt);
+ if (trace_selftest_recursion_cnt != 2) {
+ pr_cont("*callback not called expected 2 times (%d)* ",
+ trace_selftest_recursion_cnt);
goto out;
}
@@ -568,7 +559,7 @@ trace_selftest_function_regs(void)
int ret;
int supported = 0;
-#ifdef ARCH_SUPPORTS_FTRACE_SAVE_REGS
+#ifdef CONFIG_DYNAMIC_FTRACE_WITH_REGS
supported = 1;
#endif
@@ -675,7 +666,7 @@ trace_selftest_startup_function(struct tracer *trace, struct trace_array *tr)
ftrace_enabled = 0;
/* check the trace buffer */
- ret = trace_test_buffer(tr, &count);
+ ret = trace_test_buffer(&tr->trace_buffer, &count);
trace->reset(tr);
tracing_start();
@@ -712,8 +703,6 @@ trace_selftest_startup_function(struct tracer *trace, struct trace_array *tr)
/* Maximum number of functions to trace before diagnosing a hang */
#define GRAPH_MAX_FUNC_TEST 100000000
-static void
-__ftrace_dump(bool disable_tracing, enum ftrace_dump_mode oops_dump_mode);
static unsigned int graph_hang_thresh;
/* Wrap the real function entry probe to avoid possible hanging */
@@ -723,8 +712,11 @@ static int trace_graph_entry_watchdog(struct ftrace_graph_ent *trace)
if (unlikely(++graph_hang_thresh > GRAPH_MAX_FUNC_TEST)) {
ftrace_graph_stop();
printk(KERN_WARNING "BUG: Function graph tracer hang!\n");
- if (ftrace_dump_on_oops)
- __ftrace_dump(false, DUMP_ALL);
+ if (ftrace_dump_on_oops) {
+ ftrace_dump(DUMP_ALL);
+ /* ftrace_dump() disables tracing */
+ tracing_on();
+ }
return 0;
}
@@ -746,7 +738,7 @@ trace_selftest_startup_function_graph(struct tracer *trace,
* Simulate the init() callback but we attach a watchdog callback
* to detect and recover from possible hangs
*/
- tracing_reset_online_cpus(tr);
+ tracing_reset_online_cpus(&tr->trace_buffer);
set_graph_array(tr);
ret = register_ftrace_graph(&trace_graph_return,
&trace_graph_entry_watchdog);
@@ -769,7 +761,7 @@ trace_selftest_startup_function_graph(struct tracer *trace,
tracing_stop();
/* check the trace buffer */
- ret = trace_test_buffer(tr, &count);
+ ret = trace_test_buffer(&tr->trace_buffer, &count);
trace->reset(tr);
tracing_start();
@@ -824,9 +816,9 @@ trace_selftest_startup_irqsoff(struct tracer *trace, struct trace_array *tr)
/* stop the tracing. */
tracing_stop();
/* check both trace buffers */
- ret = trace_test_buffer(tr, NULL);
+ ret = trace_test_buffer(&tr->trace_buffer, NULL);
if (!ret)
- ret = trace_test_buffer(&max_tr, &count);
+ ret = trace_test_buffer(&tr->max_buffer, &count);
trace->reset(tr);
tracing_start();
@@ -886,9 +878,9 @@ trace_selftest_startup_preemptoff(struct tracer *trace, struct trace_array *tr)
/* stop the tracing. */
tracing_stop();
/* check both trace buffers */
- ret = trace_test_buffer(tr, NULL);
+ ret = trace_test_buffer(&tr->trace_buffer, NULL);
if (!ret)
- ret = trace_test_buffer(&max_tr, &count);
+ ret = trace_test_buffer(&tr->max_buffer, &count);
trace->reset(tr);
tracing_start();
@@ -952,11 +944,11 @@ trace_selftest_startup_preemptirqsoff(struct tracer *trace, struct trace_array *
/* stop the tracing. */
tracing_stop();
/* check both trace buffers */
- ret = trace_test_buffer(tr, NULL);
+ ret = trace_test_buffer(&tr->trace_buffer, NULL);
if (ret)
goto out;
- ret = trace_test_buffer(&max_tr, &count);
+ ret = trace_test_buffer(&tr->max_buffer, &count);
if (ret)
goto out;
@@ -982,11 +974,11 @@ trace_selftest_startup_preemptirqsoff(struct tracer *trace, struct trace_array *
/* stop the tracing. */
tracing_stop();
/* check both trace buffers */
- ret = trace_test_buffer(tr, NULL);
+ ret = trace_test_buffer(&tr->trace_buffer, NULL);
if (ret)
goto out;
- ret = trace_test_buffer(&max_tr, &count);
+ ret = trace_test_buffer(&tr->max_buffer, &count);
if (!ret && !count) {
printk(KERN_CONT ".. no entries found ..");
@@ -1093,10 +1085,10 @@ trace_selftest_startup_wakeup(struct tracer *trace, struct trace_array *tr)
/* stop the tracing. */
tracing_stop();
/* check both trace buffers */
- ret = trace_test_buffer(tr, NULL);
+ ret = trace_test_buffer(&tr->trace_buffer, NULL);
printk("ret = %d\n", ret);
if (!ret)
- ret = trace_test_buffer(&max_tr, &count);
+ ret = trace_test_buffer(&tr->max_buffer, &count);
trace->reset(tr);
@@ -1135,7 +1127,7 @@ trace_selftest_startup_sched_switch(struct tracer *trace, struct trace_array *tr
/* stop the tracing. */
tracing_stop();
/* check the trace buffer */
- ret = trace_test_buffer(tr, &count);
+ ret = trace_test_buffer(&tr->trace_buffer, &count);
trace->reset(tr);
tracing_start();
@@ -1167,7 +1159,7 @@ trace_selftest_startup_branch(struct tracer *trace, struct trace_array *tr)
/* stop the tracing. */
tracing_stop();
/* check the trace buffer */
- ret = trace_test_buffer(tr, &count);
+ ret = trace_test_buffer(&tr->trace_buffer, &count);
trace->reset(tr);
tracing_start();
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-10-20 21:43:57 +0000