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581a7b26ab
Add argument limitation test case for dynamic events. This is a boudary check for the maximum number of the probe event arguments. Link: https://lore.kernel.org/all/174055078295.4079315.14702008939511417359.stgit@mhiramat.tok.corp.google.com/ Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
43 lines
1012 B
Bash
43 lines
1012 B
Bash
#!/bin/sh
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# SPDX-License-Identifier: GPL-2.0
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# description: Checking dynamic events limitations
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# requires: dynamic_events "imm-value":README
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# Max arguments limitation
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MAX_ARGS=128
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EXCEED_ARGS=$((MAX_ARGS + 1))
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check_max_args() { # event_header
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TEST_STRING=$1
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# Acceptable
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for i in `seq 1 $MAX_ARGS`; do
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TEST_STRING="$TEST_STRING \\$i"
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done
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echo "$TEST_STRING" >> dynamic_events
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echo > dynamic_events
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# Error
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TEST_STRING="$TEST_STRING \\$EXCEED_ARGS"
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! echo "$TEST_STRING" >> dynamic_events
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return 0
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}
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# Kprobe max args limitation
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if grep -q "kprobe_events" README; then
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check_max_args "p vfs_read"
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fi
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# Fprobe max args limitation
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if grep -q "f[:[<group>/][<event>]] <func-name>[%return] [<args>]" README; then
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check_max_args "f vfs_read"
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fi
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# Tprobe max args limitation
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if grep -q "t[:[<group>/][<event>]] <tracepoint> [<args>]" README; then
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check_max_args "t kfree"
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fi
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# Uprobe max args limitation
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if grep -q "uprobe_events" README; then
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check_max_args "p /bin/sh:10"
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fi
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