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e3e4031256
More recent libc implementations are now using openat/openat2 system calls so also add do_sys_openat2 to the tracing so that the test passes on these systems because do_sys_open may not be called. Thanks to Masami Hiramatsu for the help on getting this fix to work correctly. Signed-off-by: Colin Ian King <colin.king@canonical.com> Acked-by: Masami Hiramatsu <mhiramat@kernel.org> Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org> Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
35 lines
1.2 KiB
Bash
35 lines
1.2 KiB
Bash
#!/bin/sh
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# SPDX-License-Identifier: GPL-2.0
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# description: Kprobe event user-memory access
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# requires: kprobe_events '$arg<N>':README
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grep -A10 "fetcharg:" README | grep -q 'ustring' || exit_unsupported
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grep -A10 "fetcharg:" README | grep -q '\[u\]<offset>' || exit_unsupported
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:;: "user-memory access syntax and ustring working on user memory";:
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echo 'p:myevent do_sys_open path=+0($arg2):ustring path2=+u0($arg2):string' \
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> kprobe_events
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echo 'p:myevent2 do_sys_openat2 path=+0($arg2):ustring path2=+u0($arg2):string' \
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>> kprobe_events
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grep myevent kprobe_events | \
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grep -q 'path=+0($arg2):ustring path2=+u0($arg2):string'
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echo 1 > events/kprobes/myevent/enable
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echo 1 > events/kprobes/myevent2/enable
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echo > /dev/null
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echo 0 > events/kprobes/myevent/enable
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echo 0 > events/kprobes/myevent2/enable
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grep myevent trace | grep -q 'path="/dev/null" path2="/dev/null"'
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:;: "user-memory access syntax and ustring not working with kernel memory";:
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echo 'p:myevent vfs_symlink path=+0($arg3):ustring path2=+u0($arg3):string' \
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> kprobe_events
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echo 1 > events/kprobes/myevent/enable
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ln -s foo $TMPDIR/bar
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echo 0 > events/kprobes/myevent/enable
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grep myevent trace | grep -q 'path=(fault) path2=(fault)'
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exit 0
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