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Add test cases for accessing the data structure fields using BTF info. This includes the field access from parameters and retval, and accessing string information. Link: https://lore.kernel.org/all/169272161265.160970.14048619786574971276.stgit@devnote2/ Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org> Reviewed-by: Alan Maguire <alan.maguire@oracle.com> Acked-by: Steven Rostedt (Google) <rostedt@goodmis.org>
79 lines
1.9 KiB
Bash
79 lines
1.9 KiB
Bash
#!/bin/sh
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# SPDX-License-Identifier: GPL-2.0
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# description: Generic dynamic event - add/remove probes with BTF arguments
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# requires: dynamic_events "<argname>":README
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KPROBES=
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FPROBES=
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FIELDS=
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if grep -qF "p[:[<group>/][<event>]] <place> [<args>]" README ; then
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KPROBES=yes
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fi
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if grep -qF "f[:[<group>/][<event>]] <func-name>[%return] [<args>]" README ; then
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FPROBES=yes
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fi
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if grep -qF "<argname>[->field[->field|.field...]]" README ; then
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FIELDS=yes
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fi
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if [ -z "$KPROBES" -a -z "$FPROBES" ] ; then
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exit_unsupported
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fi
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echo 0 > events/enable
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echo > dynamic_events
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TP=kfree
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TP2=kmem_cache_alloc
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TP3=getname_flags
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TP4=sched_wakeup
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if [ "$FPROBES" ] ; then
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echo "f:fpevent $TP object" >> dynamic_events
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echo "t:tpevent $TP ptr" >> dynamic_events
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grep -q "fpevent.*object=object" dynamic_events
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grep -q "tpevent.*ptr=ptr" dynamic_events
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echo > dynamic_events
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echo "f:fpevent $TP "'$arg1' >> dynamic_events
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grep -q "fpevent.*object=object" dynamic_events
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echo > dynamic_events
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echo "f:fpevent $TP "'$arg*' >> dynamic_events
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echo "t:tpevent $TP "'$arg*' >> dynamic_events
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grep -q "fpevent.*object=object" dynamic_events
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grep -q "tpevent.*ptr=ptr" dynamic_events
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! grep -q "tpevent.*_data" dynamic_events
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fi
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echo > dynamic_events
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if [ "$FIELDS" ] ; then
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echo "t:tpevent ${TP2} obj_size=s->object_size" >> dynamic_events
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echo "f:fpevent ${TP3}%return path=\$retval->name:string" >> dynamic_events
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echo "t:tpevent2 ${TP4} p->se.group_node.next->prev" >> dynamic_events
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grep -q "tpevent .*obj_size=s->object_size" dynamic_events
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grep -q "fpevent.*path=\$retval->name:string" dynamic_events
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grep -q 'tpevent2 .*p->se.group_node.next->prev' dynamic_events
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echo > dynamic_events
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fi
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if [ "$KPROBES" ] ; then
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echo "p:kpevent $TP object" >> dynamic_events
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grep -q "kpevent.*object=object" dynamic_events
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echo > dynamic_events
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echo "p:kpevent $TP "'$arg*' >> dynamic_events
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grep -q "kpevent.*object=object" dynamic_events
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fi
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clear_trace
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