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d12d7bf92b
[ Upstream commit f0c0d0cf590f71b2213b29a7ded2cde3d0a1a0ba ]
It is possible to get multiple records from trace during test and then more
than 4 arguments are assigned to ARGS. This situation results in the failure
of kprobe_args_type.tc. For example:
-----------------------------------------------------------
grep testprobe trace
ftracetest-5902 [001] d... 111195.682227: testprobe: (_do_fork+0x0/0x460) arg1=334823024 arg2=334823024 arg3=0x13f4fe70 arg4=7
pmlogger-5949 [000] d... 111195.709898: testprobe: (_do_fork+0x0/0x460) arg1=345308784 arg2=345308784 arg3=0x1494fe70 arg4=7
grep testprobe trace
sed -e 's/.* arg1=\(.*\) arg2=\(.*\) arg3=\(.*\) arg4=\(.*\)/\1 \2 \3 \4/'
ARGS='334823024 334823024 0x13f4fe70 7
345308784 345308784 0x1494fe70 7'
-----------------------------------------------------------
We don't care which process calls do_fork so just check the first record to
fix the issue.
Signed-off-by: Xiao Yang <yangx.jy@cn.fujitsu.com>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
51 lines
1.3 KiB
Bash
51 lines
1.3 KiB
Bash
#!/bin/sh
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# SPDX-License-Identifier: GPL-2.0
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# description: Kprobes event arguments with types
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[ -f kprobe_events ] || exit_unsupported # this is configurable
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grep "x8/16/32/64" README > /dev/null || exit_unsupported # version issue
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gen_event() { # Bitsize
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echo "p:testprobe _do_fork \$stack0:s$1 \$stack0:u$1 \$stack0:x$1 \$stack0:b4@4/$1"
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}
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check_types() { # s-type u-type x-type bf-type width
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test $# -eq 5
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CW=$5
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CW=$((CW / 4))
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X1=`printf "%x" $1 | tail -c ${CW}`
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X2=`printf "%x" $2`
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X3=`printf "%x" $3`
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test $X1 = $X2
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test $X2 = $X3
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test 0x$X3 = $3
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B4=`printf "%1x" $4`
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B3=`printf "%03x" 0x$X3 | tail -c 2 | head -c 1`
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test $B3 = $B4
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}
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for width in 64 32 16 8; do
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: "Add new event with basic types"
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gen_event $width > kprobe_events
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grep testprobe kprobe_events
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test -d events/kprobes/testprobe
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: "Trace the event"
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echo 1 > events/kprobes/testprobe/enable
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( echo "forked")
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echo 0 > events/kprobes/testprobe/enable
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: "Confirm the arguments is recorded in given types correctly"
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ARGS=`grep "testprobe" trace | head -n 1 | sed -e 's/.* arg1=\(.*\) arg2=\(.*\) arg3=\(.*\) arg4=\(.*\)/\1 \2 \3 \4/'`
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check_types $ARGS $width
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: "Clear event for next loop"
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echo "-:testprobe" >> kprobe_events
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clear_trace
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done
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exit_pass
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