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Commit 8ab4483e authored by Masami Hiramatsu's avatar Masami Hiramatsu Committed by Steven Rostedt (VMware)
Browse files

selftests/ftrace: Add error_log testcase for probe errors 

Add error_log testcase for error logs on probe events.
This tests most of error cases and checks the error position
is correct.

Link: http://lkml.kernel.org/r/63d695b74e0965988fa54ffa12beeb2c3475250d.1554072478.git.tom.zanussi@linux.intel.com



Acked-by: default avatarNamhyung Kim <namhyung@kernel.org>
Signed-off-by: default avatarMasami Hiramatsu <mhiramat@kernel.org>
[tom.zanussi@linux.intel.com: changed >& redirection to 2>]
Signed-off-by: default avatarTom Zanussi <tom.zanussi@linux.intel.com>
Signed-off-by: default avatarSteven Rostedt (VMware) <rostedt@goodmis.org>
parent 2f754e77

tools/testing/selftests/ftrace/test.d/kprobe/kprobe_syntax_errors.tc

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Original line number Diff line number Diff line 
#!/bin/sh

# SPDX-License-Identifier: GPL-2.0

# description: Kprobe event parser error log check



[ -f kprobe_events ] || exit_unsupported # this is configurable



[ -f error_log ] || exit_unsupported



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

pos=$(echo -n "${1%^*}" | wc -c) # error position

command=$(echo "$1" | tr -d ^)

echo "Test command: $command"

echo > error_log

(! echo "$command" > kprobe_events ) 2> /dev/null

grep "trace_kprobe: error:" -A 3 error_log

N=$(tail -n 1 error_log | wc -c)

# "  Command: " and "^\n" => 13

test $(expr 13 + $pos) -eq $N

}



if grep -q 'r\[maxactive\]' README; then

check_error 'p^100 vfs_read'		# MAXACT_NO_KPROBE

check_error 'r^1a111 vfs_read'		# BAD_MAXACT

check_error 'r^100000 vfs_read'		# MAXACT_TOO_BIG

fi



check_error 'p ^non_exist_func'		# BAD_PROBE_ADDR (enoent)

check_error 'p ^hoge-fuga'		# BAD_PROBE_ADDR (bad syntax)

check_error 'p ^hoge+1000-1000'		# BAD_PROBE_ADDR (bad syntax)

check_error 'r ^vfs_read+10'		# BAD_RETPROBE

check_error 'p:^/bar vfs_read'		# NO_GROUP_NAME

check_error 'p:^12345678901234567890123456789012345678901234567890123456789012345/bar vfs_read'	# GROUP_TOO_LONG



check_error 'p:^foo.1/bar vfs_read'	# BAD_GROUP_NAME

check_error 'p:foo/^ vfs_read'		# NO_EVENT_NAME

check_error 'p:foo/^12345678901234567890123456789012345678901234567890123456789012345 vfs_read'	# EVENT_TOO_LONG

check_error 'p:foo/^bar.1 vfs_read'	# BAD_EVENT_NAME



check_error 'p vfs_read ^$retval'	# RETVAL_ON_PROBE

check_error 'p vfs_read ^$stack10000'	# BAD_STACK_NUM



if grep -q '$arg<N>' README; then

check_error 'p vfs_read ^$arg10000'	# BAD_ARG_NUM

fi



check_error 'p vfs_read ^$none_var'	# BAD_VAR



check_error 'p vfs_read ^%none_reg'	# BAD_REG_NAME

check_error 'p vfs_read ^@12345678abcde'	# BAD_MEM_ADDR

check_error 'p vfs_read ^@+10'		# FILE_ON_KPROBE



check_error 'p vfs_read ^+0@0)'		# DEREF_NEED_BRACE

check_error 'p vfs_read ^+0ab1(@0)'	# BAD_DEREF_OFFS

check_error 'p vfs_read +0(+0(@0^)'	# DEREF_OPEN_BRACE



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

check_error 'p vfs_read +0(^$comm)'	# COMM_CANT_DEREF

fi



check_error 'p vfs_read ^&1'		# BAD_FETCH_ARG





# We've introduced this limitation with array support

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

check_error 'p vfs_read +0(^+0(+0(+0(+0(+0(+0(+0(+0(+0(+0(+0(+0(+0(@0))))))))))))))'	# TOO_MANY_OPS?

check_error 'p vfs_read +0(@11):u8[10^'		# ARRAY_NO_CLOSE

check_error 'p vfs_read +0(@11):u8[10]^a'	# BAD_ARRAY_SUFFIX

check_error 'p vfs_read +0(@11):u8[^10a]'	# BAD_ARRAY_NUM

check_error 'p vfs_read +0(@11):u8[^256]'	# ARRAY_TOO_BIG

fi



check_error 'p vfs_read @11:^unknown_type'	# BAD_TYPE

check_error 'p vfs_read $stack0:^string'	# BAD_STRING

check_error 'p vfs_read @11:^b10@a/16'		# BAD_BITFIELD



check_error 'p vfs_read ^arg123456789012345678901234567890=@11'	# ARG_NAME_TOO_LOG

check_error 'p vfs_read ^=@11'			# NO_ARG_NAME

check_error 'p vfs_read ^var.1=@11'		# BAD_ARG_NAME

check_error 'p vfs_read var1=@11 ^var1=@12'	# USED_ARG_NAME

check_error 'p vfs_read ^+1234567(+1234567(+1234567(+1234567(+1234567(+1234567(@1234))))))'	# ARG_TOO_LONG

check_error 'p vfs_read arg1=^'			# NO_ARG_BODY



# instruction boundary check is valid on x86 (at this moment)

case $(uname -m) in

  x86_64|i[3456]86)

    echo 'p vfs_read' > kprobe_events

    if grep -q FTRACE ../kprobes/list ; then

	check_error 'p ^vfs_read+3'		# BAD_INSN_BNDRY (only if function-tracer is enabled)

    fi

    ;;

esac



exit 0

tools/testing/selftests/ftrace/test.d/kprobe/uprobe_syntax_errors.tc

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Original line number Diff line number Diff line 
#!/bin/sh

# SPDX-License-Identifier: GPL-2.0

# description: Uprobe event parser error log check



[ -f uprobe_events ] || exit_unsupported # this is configurable



[ -f error_log ] || exit_unsupported



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

pos=$(echo -n "${1%^*}" | wc -c) # error position

command=$(echo "$1" | tr -d ^)

echo "Test command: $command"

echo > error_log

(! echo "$command" > uprobe_events ) 2> /dev/null

grep "trace_uprobe: error:" -A 3 error_log

N=$(tail -n 1 error_log | wc -c)

# "  Command: " and "^\n" => 13

test $(expr 13 + $pos) -eq $N

}



check_error 'p ^/non_exist_file:100'	# FILE_NOT_FOUND

check_error 'p ^/sys:100'		# NO_REGULAR_FILE

check_error 'p /bin/sh:^10a'		# BAD_UPROBE_OFFS

check_error 'p /bin/sh:10(^1a)'		# BAD_REFCNT

check_error 'p /bin/sh:10(10^'		# REFCNT_OPEN_BRACE

check_error 'p /bin/sh:10(10)^a'	# BAD_REFCNT_SUFFIX



check_error 'p /bin/sh:10 ^@+ab'	# BAD_FILE_OFFS

check_error 'p /bin/sh:10 ^@symbol'	# SYM_ON_UPROBE



exit 0