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tracing: add trace_array_printk for internal tracers to use

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This patch adds a trace_array_printk to allow a tracer to use the
trace_printk on its own trace array.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Steven Rostedt 2009-09-03 19:11:07 -04:00 • committed by Steven Rostedt
parent e77405ad80
commit 659372d3e4
2 changed files with 27 additions and 2 deletions
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24
kernel/trace/trace.c
View file

@ -1201,7 +1201,23 @@ out:
} }
EXPORT_SYMBOL_GPL(trace_vbprintk); EXPORT_SYMBOL_GPL(trace_vbprintk);
int trace_vprintk(unsigned long ip, const char *fmt, va_list args) int trace_array_printk(struct trace_array *tr,
unsigned long ip, const char *fmt, ...)
{
int ret;
va_list ap;
if (!(trace_flags & TRACE_ITER_PRINTK))
return 0;
va_start(ap, fmt);
ret = trace_array_vprintk(tr, ip, fmt, ap);
va_end(ap);
return ret;
}
int trace_array_vprintk(struct trace_array *tr,
unsigned long ip, const char *fmt, va_list args)
{ {
static raw_spinlock_t trace_buf_lock = __RAW_SPIN_LOCK_UNLOCKED; static raw_spinlock_t trace_buf_lock = __RAW_SPIN_LOCK_UNLOCKED;
static char trace_buf[TRACE_BUF_SIZE]; static char trace_buf[TRACE_BUF_SIZE];
@ -1209,7 +1225,6 @@ int trace_vprintk(unsigned long ip, const char *fmt, va_list args)
struct ftrace_event_call *call = &event_print; struct ftrace_event_call *call = &event_print;
struct ring_buffer_event *event; struct ring_buffer_event *event;
struct ring_buffer *buffer; struct ring_buffer *buffer;
struct trace_array *tr = &global_trace;
struct trace_array_cpu *data; struct trace_array_cpu *data;
int cpu, len = 0, size, pc; int cpu, len = 0, size, pc;
struct print_entry *entry; struct print_entry *entry;
@ -1260,6 +1275,11 @@ int trace_vprintk(unsigned long ip, const char *fmt, va_list args)
return len; return len;
} }
int trace_vprintk(unsigned long ip, const char *fmt, va_list args)
{
return trace_array_printk(&global_trace, ip, fmt, args);
}
EXPORT_SYMBOL_GPL(trace_vprintk); EXPORT_SYMBOL_GPL(trace_vprintk);
enum trace_file_type { enum trace_file_type {

5
kernel/trace/trace.h
View file

@ -566,6 +566,11 @@ extern int
trace_vbprintk(unsigned long ip, const char *fmt, va_list args); trace_vbprintk(unsigned long ip, const char *fmt, va_list args);
extern int extern int
trace_vprintk(unsigned long ip, const char *fmt, va_list args); trace_vprintk(unsigned long ip, const char *fmt, va_list args);
extern int
trace_array_vprintk(struct trace_array *tr,
unsigned long ip, const char *fmt, va_list args);
int trace_array_printk(struct trace_array *tr,
unsigned long ip, const char *fmt, ...);
extern unsigned long trace_flags; extern unsigned long trace_flags;