mirror of
https://github.com/edk2-porting/linux-next.git
synced 2025-01-04 19:54:03 +08:00
tracing/boot: Add function tracer filter options
Add below function-tracer filter options to boot-time tracing. - ftrace.[instance.INSTANCE.]ftrace.filters This will take an array of tracing function filter rules - ftrace.[instance.INSTANCE.]ftrace.notraces This will take an array of NON-tracing function filter rules Link: http://lkml.kernel.org/r/157867244841.17873.10933616628243103561.stgit@devnote2 Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
This commit is contained in:
parent
9d15dbbde1
commit
fe1efe9252
@ -244,11 +244,51 @@ trace_boot_init_events(struct trace_array *tr, struct xbc_node *node)
|
|||||||
#define trace_boot_init_events(tr, node) do {} while (0)
|
#define trace_boot_init_events(tr, node) do {} while (0)
|
||||||
#endif
|
#endif
|
||||||
|
|
||||||
|
#ifdef CONFIG_DYNAMIC_FTRACE
|
||||||
|
extern bool ftrace_filter_param __initdata;
|
||||||
|
extern int ftrace_set_filter(struct ftrace_ops *ops, unsigned char *buf,
|
||||||
|
int len, int reset);
|
||||||
|
extern int ftrace_set_notrace(struct ftrace_ops *ops, unsigned char *buf,
|
||||||
|
int len, int reset);
|
||||||
|
static void __init
|
||||||
|
trace_boot_set_ftrace_filter(struct trace_array *tr, struct xbc_node *node)
|
||||||
|
{
|
||||||
|
struct xbc_node *anode;
|
||||||
|
const char *p;
|
||||||
|
char *q;
|
||||||
|
|
||||||
|
xbc_node_for_each_array_value(node, "ftrace.filters", anode, p) {
|
||||||
|
q = kstrdup(p, GFP_KERNEL);
|
||||||
|
if (!q)
|
||||||
|
return;
|
||||||
|
if (ftrace_set_filter(tr->ops, q, strlen(q), 0) < 0)
|
||||||
|
pr_err("Failed to add %s to ftrace filter\n", p);
|
||||||
|
else
|
||||||
|
ftrace_filter_param = true;
|
||||||
|
kfree(q);
|
||||||
|
}
|
||||||
|
xbc_node_for_each_array_value(node, "ftrace.notraces", anode, p) {
|
||||||
|
q = kstrdup(p, GFP_KERNEL);
|
||||||
|
if (!q)
|
||||||
|
return;
|
||||||
|
if (ftrace_set_notrace(tr->ops, q, strlen(q), 0) < 0)
|
||||||
|
pr_err("Failed to add %s to ftrace filter\n", p);
|
||||||
|
else
|
||||||
|
ftrace_filter_param = true;
|
||||||
|
kfree(q);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
#else
|
||||||
|
#define trace_boot_set_ftrace_filter(tr, node) do {} while (0)
|
||||||
|
#endif
|
||||||
|
|
||||||
static void __init
|
static void __init
|
||||||
trace_boot_enable_tracer(struct trace_array *tr, struct xbc_node *node)
|
trace_boot_enable_tracer(struct trace_array *tr, struct xbc_node *node)
|
||||||
{
|
{
|
||||||
const char *p;
|
const char *p;
|
||||||
|
|
||||||
|
trace_boot_set_ftrace_filter(tr, node);
|
||||||
|
|
||||||
p = xbc_node_find_value(node, "tracer", NULL);
|
p = xbc_node_find_value(node, "tracer", NULL);
|
||||||
if (p && *p != '\0') {
|
if (p && *p != '\0') {
|
||||||
if (tracing_set_tracer(tr, p) < 0)
|
if (tracing_set_tracer(tr, p) < 0)
|
||||||
|
Loading…
Reference in New Issue
Block a user