9510035849
Add a printk.console trace point to record any printk messages into the trace, regardless of the current console loglevel. This can help correlate (existing) printk debugging with other tracing. Link: http://lkml.kernel.org/r/1322161388.5366.54.camel@jlt3.sipsolutions.net Acked-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Christoph Hellwig <hch@infradead.org> Cc: Ingo Molnar <mingo@redhat.com> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Acked-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
41 lines
1.1 KiB
C
41 lines
1.1 KiB
C
#undef TRACE_SYSTEM
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#define TRACE_SYSTEM printk
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#if !defined(_TRACE_PRINTK_H) || defined(TRACE_HEADER_MULTI_READ)
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#define _TRACE_PRINTK_H
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#include <linux/tracepoint.h>
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TRACE_EVENT_CONDITION(console,
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TP_PROTO(const char *log_buf, unsigned start, unsigned end,
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unsigned log_buf_len),
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TP_ARGS(log_buf, start, end, log_buf_len),
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TP_CONDITION(start != end),
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TP_STRUCT__entry(
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__dynamic_array(char, msg, end - start + 1)
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),
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TP_fast_assign(
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if ((start & (log_buf_len - 1)) > (end & (log_buf_len - 1))) {
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memcpy(__get_dynamic_array(msg),
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log_buf + (start & (log_buf_len - 1)),
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log_buf_len - (start & (log_buf_len - 1)));
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memcpy((char *)__get_dynamic_array(msg) +
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log_buf_len - (start & (log_buf_len - 1)),
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log_buf, end & (log_buf_len - 1));
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} else
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memcpy(__get_dynamic_array(msg),
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log_buf + (start & (log_buf_len - 1)),
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end - start);
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((char *)__get_dynamic_array(msg))[end - start] = 0;
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),
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TP_printk("%s", __get_str(msg))
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);
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#endif /* _TRACE_PRINTK_H */
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/* This part must be outside protection */
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#include <trace/define_trace.h>
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