From: mhiramat at kernel.org (Masami Hiramatsu) Subject: [PATCH v6 04/21] selftests: ftrace: Add a testcase for probepoint Date: Sat, 17 Mar 2018 21:40:31 +0900 [thread overview] Message-ID: <152129043097.31874.14273580606301767394.stgit@devbox> (raw) In-Reply-To: <152129024033.31874.15800253385376959274.stgit@devbox> Add a testcase for probe point definition. This tests symbol, address and symbol+offset syntax. The offset must be positive and smaller than UINT_MAX. Signed-off-by: Masami Hiramatsu <mhiramat at kernel.org> --- .../selftests/ftrace/test.d/kprobe/probepoint.tc | 43 ++++++++++++++++++++ 1 file changed, 43 insertions(+) create mode 100644 tools/testing/selftests/ftrace/test.d/kprobe/probepoint.tc diff --git a/tools/testing/selftests/ftrace/test.d/kprobe/probepoint.tc b/tools/testing/selftests/ftrace/test.d/kprobe/probepoint.tc new file mode 100644 index 000000000000..4fda01a08da4 --- /dev/null +++ b/tools/testing/selftests/ftrace/test.d/kprobe/probepoint.tc @@ -0,0 +1,43 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0 +# description: Kprobe events - probe points + +[ -f kprobe_events ] || exit_unsupported # this is configurable + +TARGET_FUNC=create_trace_kprobe + +dec_addr() { # hexaddr + printf "%d" "0x"`echo $1 | tail -c 8` +} + +set_offs() { # prev target next + A1=`dec_addr $1` + A2=`dec_addr $2` + A3=`dec_addr $3` + TARGET="0x$2" # an address + PREV=`expr $A1 - $A2` # offset to previous symbol + NEXT=+`expr $A3 - $A2` # offset to next symbol + OVERFLOW=+`printf "0x%x" ${PREV}` # overflow offset to previous symbol +} + +# We have to decode symbol addresses to get correct offsets. +# If the offset is not an instruction boundary, it cause -EILSEQ. +set_offs `grep -A1 -B1 ${TARGET_FUNC} /proc/kallsyms | cut -f 1 -d " " | xargs` + +UINT_TEST=no +# printf "%x" -1 returns (unsigned long)-1. +if [ `printf "%x" -1 | wc -c` != 9 ]; then + UINT_TEST=yes +fi + +echo 0 > events/enable +echo > kprobe_events +echo "p:testprobe ${TARGET_FUNC}" > kprobe_events +echo "p:testprobe ${TARGET}" > kprobe_events +echo "p:testprobe ${TARGET_FUNC}${NEXT}" > kprobe_events +! echo "p:testprobe ${TARGET_FUNC}${PREV}" > kprobe_events +if [ "${UINT_TEST}" = yes ]; then +! echo "p:testprobe ${TARGET_FUNC}${OVERFLOW}" > kprobe_events +fi +echo > kprobe_events +clear_trace -- To unsubscribe from this list: send the line "unsubscribe linux-kselftest" in the body of a message to majordomo at vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
WARNING: multiple messages have this Message-ID (diff)
From: mhiramat@kernel.org (Masami Hiramatsu) Subject: [PATCH v6 04/21] selftests: ftrace: Add a testcase for probepoint Date: Sat, 17 Mar 2018 21:40:31 +0900 [thread overview] Message-ID: <152129043097.31874.14273580606301767394.stgit@devbox> (raw) Message-ID: <20180317124031.-yTIMdb2NgY6gSHQoAjPTmoJXOY_sLCgpTdAwNczF_o@z> (raw) In-Reply-To: <152129024033.31874.15800253385376959274.stgit@devbox> Add a testcase for probe point definition. This tests symbol, address and symbol+offset syntax. The offset must be positive and smaller than UINT_MAX. Signed-off-by: Masami Hiramatsu <mhiramat at kernel.org> --- .../selftests/ftrace/test.d/kprobe/probepoint.tc | 43 ++++++++++++++++++++ 1 file changed, 43 insertions(+) create mode 100644 tools/testing/selftests/ftrace/test.d/kprobe/probepoint.tc diff --git a/tools/testing/selftests/ftrace/test.d/kprobe/probepoint.tc b/tools/testing/selftests/ftrace/test.d/kprobe/probepoint.tc new file mode 100644 index 000000000000..4fda01a08da4 --- /dev/null +++ b/tools/testing/selftests/ftrace/test.d/kprobe/probepoint.tc @@ -0,0 +1,43 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0 +# description: Kprobe events - probe points + +[ -f kprobe_events ] || exit_unsupported # this is configurable + +TARGET_FUNC=create_trace_kprobe + +dec_addr() { # hexaddr + printf "%d" "0x"`echo $1 | tail -c 8` +} + +set_offs() { # prev target next + A1=`dec_addr $1` + A2=`dec_addr $2` + A3=`dec_addr $3` + TARGET="0x$2" # an address + PREV=`expr $A1 - $A2` # offset to previous symbol + NEXT=+`expr $A3 - $A2` # offset to next symbol + OVERFLOW=+`printf "0x%x" ${PREV}` # overflow offset to previous symbol +} + +# We have to decode symbol addresses to get correct offsets. +# If the offset is not an instruction boundary, it cause -EILSEQ. +set_offs `grep -A1 -B1 ${TARGET_FUNC} /proc/kallsyms | cut -f 1 -d " " | xargs` + +UINT_TEST=no +# printf "%x" -1 returns (unsigned long)-1. +if [ `printf "%x" -1 | wc -c` != 9 ]; then + UINT_TEST=yes +fi + +echo 0 > events/enable +echo > kprobe_events +echo "p:testprobe ${TARGET_FUNC}" > kprobe_events +echo "p:testprobe ${TARGET}" > kprobe_events +echo "p:testprobe ${TARGET_FUNC}${NEXT}" > kprobe_events +! echo "p:testprobe ${TARGET_FUNC}${PREV}" > kprobe_events +if [ "${UINT_TEST}" = yes ]; then +! echo "p:testprobe ${TARGET_FUNC}${OVERFLOW}" > kprobe_events +fi +echo > kprobe_events +clear_trace -- To unsubscribe from this list: send the line "unsubscribe linux-kselftest" in the body of a message to majordomo at vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
next prev parent reply other threads:[~2018-03-17 12:40 UTC|newest] Thread overview: 68+ messages / expand[flat|nested] mbox.gz Atom feed top 2018-03-17 12:37 [PATCH v6 00/21] tracing: probeevent: Improve fetcharg features mhiramat 2018-03-17 12:37 ` Masami Hiramatsu 2018-03-17 12:38 ` [PATCH v6 01/21] [BUGFIX] tracing: probeevent: Fix to support minus offset from symbol mhiramat 2018-03-17 12:38 ` Masami Hiramatsu 2018-03-17 12:38 ` [PATCH v6 02/21] selftests: ftrace: Add probe event argument syntax testcase mhiramat 2018-03-17 12:38 ` Masami Hiramatsu 2018-03-17 12:39 ` [PATCH v6 03/21] selftests: ftrace: Add a testcase for string type with kprobe_event mhiramat 2018-03-17 12:39 ` Masami Hiramatsu 2018-03-17 12:40 ` mhiramat [this message] 2018-03-17 12:40 ` [PATCH v6 04/21] selftests: ftrace: Add a testcase for probepoint Masami Hiramatsu 2018-03-23 16:19 ` rostedt 2018-03-23 16:19 ` Steven Rostedt 2018-03-17 12:41 ` [PATCH v6 05/21] tracing: probeevent: Cleanup print argument functions mhiramat 2018-03-17 12:41 ` Masami Hiramatsu 2018-03-23 16:36 ` rostedt 2018-03-23 16:36 ` Steven Rostedt 2018-03-26 4:17 ` mhiramat 2018-03-26 4:17 ` Masami Hiramatsu 2018-03-26 17:28 ` rostedt 2018-03-26 17:28 ` Steven Rostedt 2018-03-28 4:21 ` mhiramat 2018-03-28 4:21 ` Masami Hiramatsu 2018-03-17 12:41 ` [PATCH v6 06/21] tracing: probeevent: Cleanup argument field definition mhiramat 2018-03-17 12:41 ` Masami Hiramatsu 2018-03-17 12:42 ` [PATCH v6 07/21] tracing: probeevent: Remove NOKPROBE_SYMBOL from print functions mhiramat 2018-03-17 12:42 ` Masami Hiramatsu 2018-03-17 12:43 ` [PATCH v6 08/21] tracing: probeevent: Introduce new argument fetching code mhiramat 2018-03-17 12:43 ` Masami Hiramatsu 2018-03-17 12:44 ` [PATCH v6 09/21] tracing: probeevent: Unify fetch type tables mhiramat 2018-03-17 12:44 ` Masami Hiramatsu 2018-03-17 12:44 ` [PATCH v6 10/21] tracing: probeevent: Return consumed bytes of dynamic area mhiramat 2018-03-17 12:44 ` Masami Hiramatsu 2018-04-02 20:02 ` rostedt 2018-04-02 20:02 ` Steven Rostedt 2018-04-03 14:41 ` mhiramat 2018-04-03 14:41 ` Masami Hiramatsu 2018-03-17 12:45 ` [PATCH v6 11/21] tracing: probeevent: Append traceprobe_ for exported function mhiramat 2018-03-17 12:45 ` Masami Hiramatsu 2018-03-17 12:46 ` [PATCH v6 12/21] tracing: probeevent: Unify fetch_insn processing common part mhiramat 2018-03-17 12:46 ` Masami Hiramatsu 2018-03-17 12:47 ` [PATCH v6 13/21] tracing: probeevent: Add symbol type mhiramat 2018-03-17 12:47 ` Masami Hiramatsu 2018-03-17 12:47 ` [PATCH v6 14/21] x86: ptrace: Add function argument access API mhiramat 2018-03-17 12:47 ` Masami Hiramatsu 2018-03-17 12:48 ` [PATCH v6 15/21] tracing: probeevent: Add $argN for accessing function args mhiramat 2018-03-17 12:48 ` Masami Hiramatsu 2018-03-17 12:49 ` [PATCH v6 16/21] tracing: probeevent: Add array type support mhiramat 2018-03-17 12:49 ` Masami Hiramatsu 2018-03-17 12:50 ` [PATCH v6 17/21] selftests: ftrace: Add a testcase for symbol type mhiramat 2018-03-17 12:50 ` Masami Hiramatsu 2018-03-17 12:50 ` [PATCH v6 18/21] selftests: ftrace: Add a testcase for $argN with kprobe_event mhiramat 2018-03-17 12:50 ` Masami Hiramatsu 2018-03-17 12:51 ` [PATCH v6 19/21] selftests: ftrace: Add a testcase for array type " mhiramat 2018-03-17 12:51 ` Masami Hiramatsu 2018-03-17 12:52 ` [PATCH v6 20/21] [RESEND] perf-probe: Fix to convert array type collectly mhiramat 2018-03-17 12:52 ` Masami Hiramatsu 2018-03-17 12:53 ` [PATCH v6 21/21] perf-probe: Add array argument support mhiramat 2018-03-17 12:53 ` Masami Hiramatsu 2018-03-19 7:59 ` ravi.bangoria 2018-03-19 7:59 ` Ravi Bangoria 2018-03-22 10:23 ` mhiramat 2018-03-22 10:23 ` Masami Hiramatsu 2018-03-22 10:49 ` ravi.bangoria 2018-03-22 10:49 ` Ravi Bangoria 2018-03-26 3:53 ` mhiramat 2018-03-26 3:53 ` Masami Hiramatsu 2018-03-17 14:06 ` [PATCH v6 00/21] tracing: probeevent: Improve fetcharg features mhiramat 2018-03-17 14:06 ` Masami Hiramatsu
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