45 lines
1 KiB
Bash
45 lines
1 KiB
Bash
#!/bin/sh
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# SPDX-License-Identifier: GPL-2.0
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# description: Kprobe dynamic event with function tracer
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# requires: kprobe_events stack_trace_filter function:tracer
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# prepare
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echo nop > current_tracer
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echo $FUNCTION_FORK > set_ftrace_filter
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echo "p:testprobe $FUNCTION_FORK" > kprobe_events
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# kprobe on / ftrace off
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echo 1 > events/kprobes/testprobe/enable
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echo > trace
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( echo "forked")
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grep testprobe trace
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! grep "$FUNCTION_FORK <-" trace
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# kprobe on / ftrace on
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echo function > current_tracer
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echo > trace
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( echo "forked")
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grep testprobe trace
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grep "$FUNCTION_FORK <-" trace
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# kprobe off / ftrace on
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echo 0 > events/kprobes/testprobe/enable
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echo > trace
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( echo "forked")
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! grep testprobe trace
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grep "$FUNCTION_FORK <-" trace
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# kprobe on / ftrace on
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echo 1 > events/kprobes/testprobe/enable
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echo function > current_tracer
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echo > trace
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( echo "forked")
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grep testprobe trace
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grep "$FUNCTION_FORK <-" trace
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# kprobe on / ftrace off
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echo nop > current_tracer
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echo > trace
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( echo "forked")
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grep testprobe trace
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! grep "$FUNCTION_FORK <-" trace
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