03fa483821
Some kernels, like 4.19.13-300.fc29.x86_64 in fedora 29, fail with the existing probe definition asking for the contents of result->name, working when we ask for the 'filename' variable instead, so add a fallback to that. Now those tests are back working on fedora 29 systems with that kernel: # perf test vfs_getname 65: Use vfs_getname probe to get syscall args filenames : Ok 66: Add vfs_getname probe to get syscall args filenames : Ok 67: Check open filename arg using perf trace + vfs_getname: Ok # Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Link: https://lkml.kernel.org/n/tip-klt3n0i58dfqttveti09q3fi@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
25 lines
807 B
Bash
25 lines
807 B
Bash
# Arnaldo Carvalho de Melo <acme@kernel.org>, 2017
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perf probe -l 2>&1 | grep -q probe:vfs_getname
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had_vfs_getname=$?
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cleanup_probe_vfs_getname() {
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if [ $had_vfs_getname -eq 1 ] ; then
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perf probe -q -d probe:vfs_getname*
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fi
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}
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add_probe_vfs_getname() {
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local verbose=$1
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if [ $had_vfs_getname -eq 1 ] ; then
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line=$(perf probe -L getname_flags 2>&1 | egrep 'result.*=.*filename;' | sed -r 's/[[:space:]]+([[:digit:]]+)[[:space:]]+result->uptr.*/\1/')
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perf probe -q "vfs_getname=getname_flags:${line} pathname=result->name:string" || \
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perf probe $verbose "vfs_getname=getname_flags:${line} pathname=filename:string"
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fi
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}
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skip_if_no_debuginfo() {
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add_probe_vfs_getname -v 2>&1 | egrep -q "^(Failed to find the path for kernel|Debuginfo-analysis is not supported)" && return 2
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return 1
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}
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