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Diffstat (limited to 'kernel/trace/ftrace.c')
-rw-r--r--kernel/trace/ftrace.c51
1 files changed, 33 insertions, 18 deletions
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 6380ec0453e0..74fa302d9a68 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -128,8 +128,9 @@ static void ftrace_ops_list_func(unsigned long ip, unsigned long parent_ip,
struct ftrace_ops *op, struct pt_regs *regs);
#else
/* See comment below, where ftrace_ops_list_func is defined */
-static void ftrace_ops_no_ops(unsigned long ip, unsigned long parent_ip);
-#define ftrace_ops_list_func ((ftrace_func_t)ftrace_ops_no_ops)
+static void ftrace_ops_no_ops(unsigned long ip, unsigned long parent_ip,
+ struct ftrace_ops *op, struct pt_regs *regs);
+#define ftrace_ops_list_func ftrace_ops_no_ops
#endif
/*
@@ -637,8 +638,7 @@ static int function_stat_show(struct seq_file *m, void *v)
}
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
- avg = rec->time;
- do_div(avg, rec->counter);
+ avg = div64_ul(rec->time, rec->counter);
if (tracing_thresh && (avg < tracing_thresh))
goto out;
#endif
@@ -664,7 +664,8 @@ static int function_stat_show(struct seq_file *m, void *v)
* Divide only 1000 for ns^2 -> us^2 conversion.
* trace_print_graph_duration will divide 1000 again.
*/
- do_div(stddev, rec->counter * (rec->counter - 1) * 1000);
+ stddev = div64_ul(stddev,
+ rec->counter * (rec->counter - 1) * 1000);
}
trace_seq_init(&s);
@@ -1943,12 +1944,18 @@ static int ftrace_hash_ipmodify_update(struct ftrace_ops *ops,
static void print_ip_ins(const char *fmt, unsigned char *p)
{
+ char ins[MCOUNT_INSN_SIZE];
int i;
+ if (probe_kernel_read(ins, p, MCOUNT_INSN_SIZE)) {
+ printk(KERN_CONT "%s[FAULT] %px\n", fmt, p);
+ return;
+ }
+
printk(KERN_CONT "%s", fmt);
for (i = 0; i < MCOUNT_INSN_SIZE; i++)
- printk(KERN_CONT "%s%02x", i ? ":" : "", p[i]);
+ printk(KERN_CONT "%s%02x", i ? ":" : "", ins[i]);
}
static struct ftrace_ops *
@@ -2823,8 +2830,11 @@ static int referenced_filters(struct dyn_ftrace *rec)
int cnt = 0;
for (ops = ftrace_ops_list; ops != &ftrace_list_end; ops = ops->next) {
- if (ops_references_rec(ops, rec))
- cnt++;
+ if (ops_references_rec(ops, rec)) {
+ cnt++;
+ if (ops->flags & FTRACE_OPS_FL_SAVE_REGS)
+ rec->flags |= FTRACE_FL_REGS;
+ }
}
return cnt;
@@ -2874,7 +2884,7 @@ static int ftrace_update_code(struct module *mod, struct ftrace_page *new_pgs)
p = &pg->records[i];
if (test)
cnt += referenced_filters(p);
- p->flags = cnt;
+ p->flags += cnt;
/*
* Do the initial record conversion from mcount jump
@@ -4398,8 +4408,11 @@ int ftrace_regex_release(struct inode *inode, struct file *file)
parser = &iter->parser;
if (trace_parser_loaded(parser)) {
+ int enable = !(iter->flags & FTRACE_ITER_NOTRACE);
+
parser->buffer[parser->idx] = 0;
- ftrace_match_records(iter->hash, parser->buffer, parser->idx);
+ ftrace_process_regex(iter->hash, parser->buffer,
+ parser->idx, enable);
}
trace_parser_put(parser);
@@ -5173,7 +5186,7 @@ __ftrace_ops_list_func(unsigned long ip, unsigned long parent_ip,
struct ftrace_ops *op;
int bit;
- bit = trace_test_and_set_recursion(TRACE_LIST_START, TRACE_LIST_MAX);
+ bit = trace_test_and_set_recursion(TRACE_LIST_START);
if (bit < 0)
return;
@@ -5217,7 +5230,8 @@ static void ftrace_ops_list_func(unsigned long ip, unsigned long parent_ip,
}
NOKPROBE_SYMBOL(ftrace_ops_list_func);
#else
-static void ftrace_ops_no_ops(unsigned long ip, unsigned long parent_ip)
+static void ftrace_ops_no_ops(unsigned long ip, unsigned long parent_ip,
+ struct ftrace_ops *op, struct pt_regs *regs)
{
__ftrace_ops_list_func(ip, parent_ip, NULL, NULL);
}
@@ -5234,7 +5248,7 @@ static void ftrace_ops_recurs_func(unsigned long ip, unsigned long parent_ip,
{
int bit;
- bit = trace_test_and_set_recursion(TRACE_LIST_START, TRACE_LIST_MAX);
+ bit = trace_test_and_set_recursion(TRACE_LIST_START);
if (bit < 0)
return;
@@ -5665,14 +5679,17 @@ void ftrace_graph_graph_time_control(bool enable)
fgraph_graph_time = enable;
}
+void ftrace_graph_return_stub(struct ftrace_graph_ret *trace)
+{
+}
+
int ftrace_graph_entry_stub(struct ftrace_graph_ent *trace)
{
return 0;
}
/* The callbacks that hook a function */
-trace_func_graph_ret_t ftrace_graph_return =
- (trace_func_graph_ret_t)ftrace_stub;
+trace_func_graph_ret_t ftrace_graph_return = ftrace_graph_return_stub;
trace_func_graph_ent_t ftrace_graph_entry = ftrace_graph_entry_stub;
static trace_func_graph_ent_t __ftrace_graph_entry = ftrace_graph_entry_stub;
@@ -5705,7 +5722,6 @@ static int alloc_retstack_tasklist(struct ftrace_ret_stack **ret_stack_list)
}
if (t->ret_stack == NULL) {
- atomic_set(&t->tracing_graph_pause, 0);
atomic_set(&t->trace_overrun, 0);
t->curr_ret_stack = -1;
/* Make sure the tasks see the -1 first: */
@@ -5901,7 +5917,7 @@ void unregister_ftrace_graph(void)
goto out;
ftrace_graph_active--;
- ftrace_graph_return = (trace_func_graph_ret_t)ftrace_stub;
+ ftrace_graph_return = ftrace_graph_return_stub;
ftrace_graph_entry = ftrace_graph_entry_stub;
__ftrace_graph_entry = ftrace_graph_entry_stub;
ftrace_shutdown(&graph_ops, FTRACE_STOP_FUNC_RET);
@@ -5917,7 +5933,6 @@ static DEFINE_PER_CPU(struct ftrace_ret_stack *, idle_ret_stack);
static void
graph_init_task(struct task_struct *t, struct ftrace_ret_stack *ret_stack)
{
- atomic_set(&t->tracing_graph_pause, 0);
atomic_set(&t->trace_overrun, 0);
t->ftrace_timestamp = 0;
/* make curr_ret_stack visible before we add the ret_stack */
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-22 15:20:29 +0000