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43 lines
1.4 KiB
43 lines
1.4 KiB
#!/bin/sh |
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# Check open filename arg using perf trace + vfs_getname |
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# Uses the 'perf test shell' library to add probe:vfs_getname to the system |
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# then use it with 'perf trace' using 'touch' to write to a temp file, then |
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# checks that that was captured by the vfs_getname was used by 'perf trace', |
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# that already handles "probe:vfs_getname" if present, and used in the |
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# "open" syscall "filename" argument beautifier. |
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# SPDX-License-Identifier: GPL-2.0 |
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# Arnaldo Carvalho de Melo <[email protected]>, 2017 |
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. $(dirname $0)/lib/probe.sh |
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skip_if_no_perf_probe || exit 2 |
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skip_if_no_perf_trace || exit 2 |
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. $(dirname $0)/lib/probe_vfs_getname.sh |
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file=$(mktemp /tmp/temporary_file.XXXXX) |
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trace_open_vfs_getname() { |
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evts=$(echo $(perf list syscalls:sys_enter_open* 2>/dev/null | egrep 'open(at)? ' | sed -r 's/.*sys_enter_([a-z]+) +\[.*$/\1/') | sed 's/ /,/') |
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perf trace -e $evts touch $file 2>&1 | \ |
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egrep " +[0-9]+\.[0-9]+ +\( +[0-9]+\.[0-9]+ ms\): +touch\/[0-9]+ open(at)?\((dfd: +CWD, +)?filename: +${file}, +flags: CREAT\|NOCTTY\|NONBLOCK\|WRONLY, +mode: +IRUGO\|IWUGO\) += +[0-9]+$" |
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} |
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add_probe_vfs_getname || skip_if_no_debuginfo |
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err=$? |
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if [ $err -ne 0 ] ; then |
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exit $err |
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fi |
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# Do not use whatever ~/.perfconfig file, it may change the output |
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# via trace.{show_timestamp,show_prefix,etc} |
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export PERF_CONFIG=/dev/null |
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trace_open_vfs_getname |
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err=$? |
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rm -f ${file} |
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cleanup_probe_vfs_getname |
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exit $err
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