Commit 6335265e authored by Masami Hiramatsu (Google)'s avatar Masami Hiramatsu (Google)
Browse files

selftests/ftrace: Add tracepoint probe test case 

Add test cases for tracepoint probe events.

Link: https://lore.kernel.org/all/168507477214.913472.11218388626709005588.stgit@mhiramat.roam.corp.google.com/



Signed-off-by: default avatarMasami Hiramatsu (Google) <mhiramat@kernel.org>
parent fd26290e

tools/testing/selftests/ftrace/test.d/dynevent/add_remove_tprobe.tc

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#!/bin/sh

# SPDX-License-Identifier: GPL-2.0

# description: Generic dynamic event - add/remove tracepoint probe events

# requires: dynamic_events "t[:[<group>/][<event>]] <tracepoint> [<args>]":README



echo 0 > events/enable

echo > dynamic_events



TRACEPOINT1=kmem_cache_alloc

TRACEPOINT2=kmem_cache_free



echo "t:myevent1 $TRACEPOINT1" >> dynamic_events

echo "t:myevent2 $TRACEPOINT2" >> dynamic_events



grep -q myevent1 dynamic_events

grep -q myevent2 dynamic_events

test -d events/tracepoints/myevent1

test -d events/tracepoints/myevent2



echo "-:myevent2" >> dynamic_events



grep -q myevent1 dynamic_events

! grep -q myevent2 dynamic_events



echo > dynamic_events



clear_trace

tools/testing/selftests/ftrace/test.d/dynevent/tprobe_syntax_errors.tc

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#!/bin/sh

# SPDX-License-Identifier: GPL-2.0

# description: Tracepoint probe event parser error log check

# requires: dynamic_events "t[:[<group>/][<event>]] <tracepoint> [<args>]":README



check_error() { # command-with-error-pos-by-^

    ftrace_errlog_check 'trace_fprobe' "$1" 'dynamic_events'

}



check_error 't^100 kfree'		# BAD_MAXACT_TYPE



check_error 't ^non_exist_tracepoint'	# NO_TRACEPOINT

check_error 't:^/bar kfree'		# NO_GROUP_NAME

check_error 't:^12345678901234567890123456789012345678901234567890123456789012345/bar kfree'	# GROUP_TOO_LONG



check_error 't:^foo.1/bar kfree'	# BAD_GROUP_NAME

check_error 't:^ kfree'			# NO_EVENT_NAME

check_error 't:foo/^12345678901234567890123456789012345678901234567890123456789012345 kfree'	# EVENT_TOO_LONG

check_error 't:foo/^bar.1 kfree'	# BAD_EVENT_NAME



check_error 't kfree ^$retval'		# RETVAL_ON_PROBE

check_error 't kfree ^$stack10000'	# BAD_STACK_NUM



check_error 't kfree ^$arg10000'	# BAD_ARG_NUM



check_error 't kfree ^$none_var'	# BAD_VAR

check_error 't kfree ^%rax'		# BAD_VAR



check_error 't kfree ^@12345678abcde'	# BAD_MEM_ADDR

check_error 't kfree ^@+10'		# FILE_ON_KPROBE



grep -q "imm-value" README && \

check_error 't kfree arg1=\^x'	# BAD_IMM

grep -q "imm-string" README && \

check_error 't kfree arg1=\"abcd^'	# IMMSTR_NO_CLOSE



check_error 't kfree ^+0@0)'		# DEREF_NEED_BRACE

check_error 't kfree ^+0ab1(@0)'	# BAD_DEREF_OFFS

check_error 't kfree +0(+0(@0^)'	# DEREF_OPEN_BRACE



if grep -A1 "fetcharg:" README | grep -q '\$comm' ; then

check_error 't kfree +0(^$comm)'	# COMM_CANT_DEREF

fi



check_error 't kfree ^&1'		# BAD_FETCH_ARG





# We've introduced this limitation with array support

if grep -q ' <type>\\\[<array-size>\\\]' README; then

check_error 't kfree +0(^+0(+0(+0(+0(+0(+0(+0(+0(+0(+0(+0(+0(+0(@0))))))))))))))'	# TOO_MANY_OPS?

check_error 't kfree +0(@11):u8[10^'		# ARRAY_NO_CLOSE

check_error 't kfree +0(@11):u8[10]^a'		# BAD_ARRAY_SUFFIX

check_error 't kfree +0(@11):u8[^10a]'		# BAD_ARRAY_NUM

check_error 't kfree +0(@11):u8[^256]'		# ARRAY_TOO_BIG

fi



check_error 't kfree @11:^unknown_type'		# BAD_TYPE

check_error 't kfree $stack0:^string'		# BAD_STRING

check_error 't kfree @11:^b10@a/16'		# BAD_BITFIELD



check_error 't kfree ^arg123456789012345678901234567890=@11'	# ARG_NAME_TOO_LOG

check_error 't kfree ^=@11'			# NO_ARG_NAME

check_error 't kfree ^var.1=@11'		# BAD_ARG_NAME

check_error 't kfree var1=@11 ^var1=@12'	# USED_ARG_NAME

check_error 't kfree ^+1234567(+1234567(+1234567(+1234567(+1234567(+1234567(@1234))))))'	# ARG_TOO_LONG

check_error 't kfree arg1=^'			# NO_ARG_BODY





# multiprobe errors

if grep -q "Create/append/" README && grep -q "imm-value" README; then

echo "t:tracepoint/testevent kfree" > dynamic_events

check_error '^f:tracepoint/testevent kfree'	# DIFF_PROBE_TYPE



# Explicitly use printf "%s" to not interpret \1

printf "%s" "t:tracepoints/testevent kfree abcd=\\1" > dynamic_events

check_error "t:tracepoints/testevent kfree ^bcd=\\1"	# DIFF_ARG_TYPE

check_error "t:tracepoints/testevent kfree ^abcd=\\1:u8"	# DIFF_ARG_TYPE

check_error "t:tracepoints/testevent kfree ^abcd=\\\"foo\"" # DIFF_ARG_TYPE

check_error "^t:tracepoints/testevent kfree abcd=\\1"	# SAME_PROBE

fi



exit 0

tools/testing/selftests/ftrace/test.d/dynevent/add_remove_fprobe.tc

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Contains only whitespace changes.

tools/testing/selftests/ftrace/test.d/dynevent/fprobe_syntax_errors.tc

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File changed.

Contains only whitespace changes.