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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>
76 lines
2.1 KiB
C
76 lines
2.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Declarations for error reporting tracepoints.
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*
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* Copyright (C) 2021, Google LLC.
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*/
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#undef TRACE_SYSTEM
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#define TRACE_SYSTEM error_report
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#if !defined(_TRACE_ERROR_REPORT_H) || defined(TRACE_HEADER_MULTI_READ)
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#define _TRACE_ERROR_REPORT_H
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#include <linux/tracepoint.h>
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#ifndef __ERROR_REPORT_DECLARE_TRACE_ENUMS_ONCE_ONLY
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#define __ERROR_REPORT_DECLARE_TRACE_ENUMS_ONCE_ONLY
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enum error_detector {
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ERROR_DETECTOR_KFENCE,
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ERROR_DETECTOR_KASAN,
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ERROR_DETECTOR_WARN,
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};
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#endif /* __ERROR_REPORT_DECLARE_TRACE_ENUMS_ONCE_ONLY */
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#define error_detector_list \
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EM(ERROR_DETECTOR_KFENCE, "kfence") \
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EM(ERROR_DETECTOR_KASAN, "kasan") \
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EMe(ERROR_DETECTOR_WARN, "warning")
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/* Always end the list with an EMe. */
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#undef EM
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#undef EMe
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#define EM(a, b) TRACE_DEFINE_ENUM(a);
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#define EMe(a, b) TRACE_DEFINE_ENUM(a);
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error_detector_list
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#undef EM
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#undef EMe
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#define EM(a, b) { a, b },
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#define EMe(a, b) { a, b }
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#define show_error_detector_list(val) \
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__print_symbolic(val, error_detector_list)
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DECLARE_EVENT_CLASS(error_report_template,
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TP_PROTO(enum error_detector error_detector, unsigned long id),
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TP_ARGS(error_detector, id),
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TP_STRUCT__entry(__field(enum error_detector, error_detector)
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__field(unsigned long, id)),
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TP_fast_assign(__entry->error_detector = error_detector;
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__entry->id = id;),
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TP_printk("[%s] %lx",
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show_error_detector_list(__entry->error_detector),
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__entry->id));
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/**
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* error_report_end - called after printing the error report
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* @error_detector: short string describing the error detection tool
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* @id: pseudo-unique descriptor identifying the report
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* (e.g. the memory access address)
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*
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* This event occurs right after a debugging tool finishes printing the error
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* report.
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*/
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DEFINE_EVENT(error_report_template, error_report_end,
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TP_PROTO(enum error_detector error_detector, unsigned long id),
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TP_ARGS(error_detector, id));
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#endif /* _TRACE_ERROR_REPORT_H */
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/* This part must be outside protection */
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#include <trace/define_trace.h>
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