23b36fec7e
Introduce the error detector "warning" to the error_report event and use the error_report_end tracepoint at the end of a warning report. This allows in-kernel tests but also userspace to more easily determine if a warning occurred without polling kernel logs. [akpm@linux-foundation.org: add comma to enum list, per Andy] Link: https://lkml.kernel.org/r/20211115085630.1756817-1-elver@google.com Signed-off-by: Marco Elver <elver@google.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Alexander Potapenko <glider@google.com> Cc: Petr Mladek <pmladek@suse.com> Cc: Luis Chamberlain <mcgrof@kernel.org> Cc: Wei Liu <wei.liu@kernel.org> Cc: Mike Rapoport <rppt@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: John Ogness <john.ogness@linutronix.de> Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Cc: Alexander Popov <alex.popov@linux.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
77 lines
2.1 KiB
C
77 lines
2.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* Declarations for error reporting tracepoints.
|
|
*
|
|
* Copyright (C) 2021, Google LLC.
|
|
*/
|
|
#undef TRACE_SYSTEM
|
|
#define TRACE_SYSTEM error_report
|
|
|
|
#if !defined(_TRACE_ERROR_REPORT_H) || defined(TRACE_HEADER_MULTI_READ)
|
|
#define _TRACE_ERROR_REPORT_H
|
|
|
|
#include <linux/tracepoint.h>
|
|
|
|
#ifndef __ERROR_REPORT_DECLARE_TRACE_ENUMS_ONCE_ONLY
|
|
#define __ERROR_REPORT_DECLARE_TRACE_ENUMS_ONCE_ONLY
|
|
|
|
enum error_detector {
|
|
ERROR_DETECTOR_KFENCE,
|
|
ERROR_DETECTOR_KASAN,
|
|
ERROR_DETECTOR_WARN,
|
|
};
|
|
|
|
#endif /* __ERROR_REPORT_DECLARE_TRACE_ENUMS_ONCE_ONLY */
|
|
|
|
#define error_detector_list \
|
|
EM(ERROR_DETECTOR_KFENCE, "kfence") \
|
|
EM(ERROR_DETECTOR_KASAN, "kasan") \
|
|
EMe(ERROR_DETECTOR_WARN, "warning")
|
|
/* Always end the list with an EMe. */
|
|
|
|
#undef EM
|
|
#undef EMe
|
|
|
|
#define EM(a, b) TRACE_DEFINE_ENUM(a);
|
|
#define EMe(a, b) TRACE_DEFINE_ENUM(a);
|
|
|
|
error_detector_list
|
|
|
|
#undef EM
|
|
#undef EMe
|
|
|
|
#define EM(a, b) { a, b },
|
|
#define EMe(a, b) { a, b }
|
|
|
|
#define show_error_detector_list(val) \
|
|
__print_symbolic(val, error_detector_list)
|
|
|
|
DECLARE_EVENT_CLASS(error_report_template,
|
|
TP_PROTO(enum error_detector error_detector, unsigned long id),
|
|
TP_ARGS(error_detector, id),
|
|
TP_STRUCT__entry(__field(enum error_detector, error_detector)
|
|
__field(unsigned long, id)),
|
|
TP_fast_assign(__entry->error_detector = error_detector;
|
|
__entry->id = id;),
|
|
TP_printk("[%s] %lx",
|
|
show_error_detector_list(__entry->error_detector),
|
|
__entry->id));
|
|
|
|
/**
|
|
* error_report_end - called after printing the error report
|
|
* @error_detector: short string describing the error detection tool
|
|
* @id: pseudo-unique descriptor identifying the report
|
|
* (e.g. the memory access address)
|
|
*
|
|
* This event occurs right after a debugging tool finishes printing the error
|
|
* report.
|
|
*/
|
|
DEFINE_EVENT(error_report_template, error_report_end,
|
|
TP_PROTO(enum error_detector error_detector, unsigned long id),
|
|
TP_ARGS(error_detector, id));
|
|
|
|
#endif /* _TRACE_ERROR_REPORT_H */
|
|
|
|
/* This part must be outside protection */
|
|
#include <trace/define_trace.h>
|