This probe monitors trap entry and trap exit trace event. Signed-off-by: Francis Deslauriers <fdesl...@gmail.com> --- instrumentation/events/lttng-module/trap.h | 46 +++++++++++++++++++++++++++ instrumentation/events/mainline/trap.h | 47 ++++++++++++++++++++++++++++ probes/Makefile | 1 + probes/lttng-probe-trap.c | 43 +++++++++++++++++++++++++ 4 files changed, 137 insertions(+) create mode 100644 instrumentation/events/lttng-module/trap.h create mode 100644 instrumentation/events/mainline/trap.h create mode 100644 probes/lttng-probe-trap.c
diff --git a/instrumentation/events/lttng-module/trap.h b/instrumentation/events/lttng-module/trap.h new file mode 100644 index 0000000..124bbba --- /dev/null +++ b/instrumentation/events/lttng-module/trap.h @@ -0,0 +1,46 @@ +#undef TRACE_SYSTEM +#define TRACE_SYSTEM trap + +#if !defined(_TRACE_TRAP_H) || defined(TRACE_HEADER_MULTI_READ) +#define _TRACE_TRAP_H + +#include <linux/tracepoint.h> + +TRACE_EVENT(trap_entry, + + TP_PROTO(struct pt_regs *regs, long trap), + + TP_ARGS(regs, trap), + + TP_STRUCT__entry( + __field( long, trap ) + __field( unsigned long, ip ) + + ), + TP_fast_assign( + tp_assign(trap, trap) + tp_assign(ip, regs ? instruction_pointer(regs) : 0UL) + ), + + TP_printk("number=%ld ip=%lu", __entry->trap, __entry->ip) +) + +TRACE_EVENT(trap_exit, + + TP_PROTO(long trap), + + TP_ARGS(trap), + + TP_STRUCT__entry( + __field( long, trap ) + ), + TP_fast_assign( + tp_assign(trap, trap) + ), + + TP_printk("number=%ld", __entry->trap) +) + +#endif /* _TRACE_TRAP_H */ +/* This part must be outside protection */ +#include "../../../probes/define_trace.h" diff --git a/instrumentation/events/mainline/trap.h b/instrumentation/events/mainline/trap.h new file mode 100644 index 0000000..171b9cf --- /dev/null +++ b/instrumentation/events/mainline/trap.h @@ -0,0 +1,47 @@ +#undef TRACE_SYSTEM +#define TRACE_SYSTEM trap + +#if !defined(_TRACE_TRAP_H) || defined(TRACE_HEADER_MULTI_READ) +#define _TRACE_TRAP_H + +#include <linux/tracepoint.h> + +TRACE_EVENT(trap_entry, + + TP_PROTO(struct pt_regs *regs, long trap), + + TP_ARGS(regs, trap), + + TP_STRUCT__entry( + __field( long, trap ) + __field( unsigned long, ip ) + ), + + TP_fast_assign( + __entry->trap = trap; + __entry->ip = regs ? instruction_pointer(regs) : 0UL; + ), + + TP_printk("number=%ld ip=%lu", __entry->trap, __entry->ip) +); + +TRACE_EVENT(trap_exit, + + TP_PROTO(long trap), + + TP_ARGS(trap), + + TP_STRUCT__entry( + __field( long, trap ) + ), + + TP_fast_assign( + __entry->trap = trap; + ), + + TP_printk("number=%ld", __entry->trap) +); + +#endif /* _TRACE_TRAP_H */ +/* This part must be outside protection */ +#include <trace/define_trace.h> diff --git a/probes/Makefile b/probes/Makefile index 088cd5f..c8d0085 100644 --- a/probes/Makefile +++ b/probes/Makefile @@ -15,6 +15,7 @@ obj-m += lttng-probe-timer.o obj-m += lttng-probe-kmem.o obj-m += lttng-probe-module.o obj-m += lttng-probe-power.o +obj-m += lttng-probe-trap.o obj-m += lttng-probe-statedump.o diff --git a/probes/lttng-probe-trap.c b/probes/lttng-probe-trap.c new file mode 100644 index 0000000..17c1526 --- /dev/null +++ b/probes/lttng-probe-trap.c @@ -0,0 +1,43 @@ +/* + * probes/lttng-probe-trap.c + * + * LTTng trap probes. + * + * Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoy...@efficios.com> + * Copyright (C) 2013 Francis Deslauriers <fdesl...@gmail.com>. + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; only + * version 2.1 of the License. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include <linux/module.h> + +/* + * Create the tracepoint static inlines from the kernel to validate that our + * trace event macros match the kernel we run on. + */ +#include <trace/events/trap.h> +#include "../wrapper/tracepoint.h" +/* + * Create LTTng tracepoint probes. + */ +#define LTTNG_PACKAGE_BUILD +#define CREATE_TRACE_POINTS +#define TRACE_INCLUDE_PATH ../instrumentation/events/lttng-module + +#include "../instrumentation/events/lttng-module/trap.h" + +MODULE_LICENSE("GPL and additional rights"); +MODULE_AUTHOR("Francis Deslauriers <fdesl...@gmail.com>"); +MODULE_DESCRIPTION("LTTng trap probes"); -- 1.7.10.4 _______________________________________________ lttng-dev mailing list lttng-dev@lists.lttng.org http://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev