Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
45 lines
1.2 KiB
Bash
45 lines
1.2 KiB
Bash
#!/bin/sh
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# SPDX-License-Identifier: GPL-2.0
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# description: ftrace - function graph print function return value
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# requires: options/funcgraph-retval options/funcgraph-retval-hex function_graph:tracer
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# Make sure that funcgraph-retval works
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fail() { # msg
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echo $1
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exit_fail
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}
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disable_tracing
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clear_trace
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# get self PID, can not use $$, because it is PPID
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read PID _ < /proc/self/stat
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[ -f set_ftrace_filter ] && echo proc_reg_write > set_ftrace_filter
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[ -f set_ftrace_pid ] && echo ${PID} > set_ftrace_pid
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echo function_graph > current_tracer
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echo 1 > options/funcgraph-retval
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set +e
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enable_tracing
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echo > /proc/interrupts
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disable_tracing
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set -e
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: "Test printing the error code in signed decimal format"
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echo 0 > options/funcgraph-retval-hex
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count=`cat trace | grep 'proc_reg_write' | grep -e '=-5 ' -e '= -5 ' | wc -l`
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if [ $count -eq 0 ]; then
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fail "Return value can not be printed in signed decimal format"
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fi
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: "Test printing the error code in hexadecimal format"
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echo 1 > options/funcgraph-retval-hex
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count=`cat trace | grep 'proc_reg_write' | grep 'fffffffb' | wc -l`
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if [ $count -eq 0 ]; then
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fail "Return value can not be printed in hexadecimal format"
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fi
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exit 0
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