1#!/bin/sh
2# SPDX-License-Identifier: GPL-2.0
3# description: Fprobe event parser error log check
4# requires: dynamic_events "f[:[<group>/][<event>]] <func-name>[%return] [<args>]":README
5
6check_error() { # command-with-error-pos-by-^
7    ftrace_errlog_check 'trace_fprobe' "$1" 'dynamic_events'
8}
9
10case `uname -m` in
11x86_64|i[3456]86)
12  REG=%ax ;;
13aarch64)
14  REG=%x0 ;;
15*)
16  REG=%r0 ;;
17esac
18
19check_error 'f^100 vfs_read'		# BAD_MAXACT
20
21check_error 'f ^non_exist_func'		# BAD_PROBE_ADDR (enoent)
22check_error 'f ^vfs_read+10'		# BAD_PROBE_ADDR
23check_error 'f:^/bar vfs_read'		# NO_GROUP_NAME
24check_error 'f:^12345678901234567890123456789012345678901234567890123456789012345/bar vfs_read'	# GROUP_TOO_LONG
25
26check_error 'f:^foo.1/bar vfs_read'	# BAD_GROUP_NAME
27check_error 'f:^ vfs_read'		# NO_EVENT_NAME
28check_error 'f:foo/^12345678901234567890123456789012345678901234567890123456789012345 vfs_read'	# EVENT_TOO_LONG
29check_error 'f:foo/^bar.1 vfs_read'	# BAD_EVENT_NAME
30check_error 't kmem^/kfree'       # BAD_TP_NAME
31
32check_error 'f vfs_read ^$stack10000'	# BAD_STACK_NUM
33
34check_error 'f vfs_read ^$arg10000'	# BAD_ARG_NUM
35
36if !grep -q 'kernel return probes support:' README; then
37check_error 'f vfs_read $retval ^$arg1' # BAD_VAR
38fi
39check_error 'f vfs_read ^$none_var'	# BAD_VAR
40check_error 'f vfs_read ^'$REG		# BAD_VAR
41
42check_error 'f vfs_read ^@12345678abcde'	# BAD_MEM_ADDR
43check_error 'f vfs_read ^@+10'		# FILE_ON_KPROBE
44
45grep -q "imm-value" README && \
46check_error 'f vfs_read arg1=\^x'	# BAD_IMM
47grep -q "imm-string" README && \
48check_error 'f vfs_read arg1=\"abcd^'	# IMMSTR_NO_CLOSE
49
50check_error 'f vfs_read ^+0@0)'		# DEREF_NEED_BRACE
51check_error 'f vfs_read ^+0ab1(@0)'	# BAD_DEREF_OFFS
52check_error 'f vfs_read +0(+0(@0^)'	# DEREF_OPEN_BRACE
53
54if grep -A1 "fetcharg:" README | grep -q '\$comm' ; then
55check_error 'f vfs_read +0(^$comm)'	# COMM_CANT_DEREF
56fi
57
58check_error 'f vfs_read ^&1'		# BAD_FETCH_ARG
59
60
61# We've introduced this limitation with array support
62if grep -q ' <type>\\\[<array-size>\\\]' README; then
63check_error 'f vfs_read +0(^+0(+0(+0(+0(+0(+0(+0(+0(+0(+0(+0(+0(+0(@0))))))))))))))'	# TOO_MANY_OPS?
64check_error 'f vfs_read +0(@11):u8[10^'		# ARRAY_NO_CLOSE
65check_error 'f vfs_read +0(@11):u8[10]^a'	# BAD_ARRAY_SUFFIX
66check_error 'f vfs_read +0(@11):u8[^10a]'	# BAD_ARRAY_NUM
67check_error 'f vfs_read +0(@11):u8[^256]'	# ARRAY_TOO_BIG
68fi
69
70check_error 'f vfs_read @11:^unknown_type'	# BAD_TYPE
71check_error 'f vfs_read $stack0:^string'	# BAD_STRING
72check_error 'f vfs_read @11:^b10@a/16'		# BAD_BITFIELD
73
74check_error 'f vfs_read ^arg123456789012345678901234567890=@11'	# ARG_NAME_TOO_LOG
75check_error 'f vfs_read ^=@11'			# NO_ARG_NAME
76check_error 'f vfs_read ^var.1=@11'		# BAD_ARG_NAME
77check_error 'f vfs_read var1=@11 ^var1=@12'	# USED_ARG_NAME
78check_error 'f vfs_read ^+1234567(+1234567(+1234567(+1234567(+1234567(+1234567(@1234))))))'	# ARG_TOO_LONG
79check_error 'f vfs_read arg1=^'			# NO_ARG_BODY
80
81
82# multiprobe errors
83if grep -q "Create/append/" README && grep -q "imm-value" README; then
84echo "f:fprobes/testevent $FUNCTION_FORK" > dynamic_events
85check_error '^f:fprobes/testevent do_exit%return'	# DIFF_PROBE_TYPE
86
87# Explicitly use printf "%s" to not interpret \1
88printf "%s" "f:fprobes/testevent $FUNCTION_FORK abcd=\\1" > dynamic_events
89check_error "f:fprobes/testevent $FUNCTION_FORK ^bcd=\\1"	# DIFF_ARG_TYPE
90check_error "f:fprobes/testevent $FUNCTION_FORK ^abcd=\\1:u8"	# DIFF_ARG_TYPE
91check_error "f:fprobes/testevent $FUNCTION_FORK ^abcd=\\\"foo\"" # DIFF_ARG_TYPE
92check_error "^f:fprobes/testevent $FUNCTION_FORK abcd=\\1"	# SAME_PROBE
93fi
94
95# %return suffix errors
96check_error 'f vfs_read^%hoge'		# BAD_ADDR_SUFFIX
97
98# BTF arguments errors
99if grep -q "<argname>" README; then
100check_error 'f vfs_read args=^$arg*'		# BAD_VAR_ARGS
101check_error 'f vfs_read +0(^$arg*)'		# BAD_VAR_ARGS
102check_error 'f vfs_read $arg* ^$arg*'		# DOUBLE_ARGS
103if !grep -q 'kernel return probes support:' README; then
104check_error 'f vfs_read%return ^$arg*'		# NOFENTRY_ARGS
105fi
106check_error 'f vfs_read ^hoge'			# NO_BTFARG
107check_error 'f kfree ^$arg10'			# NO_BTFARG (exceed the number of parameters)
108check_error 'f kfree%return ^$retval'		# NO_RETVAL
109
110if grep -qF "<argname>[->field[->field|.field...]]" README ; then
111check_error 'f vfs_read%return $retval->^foo'	# NO_PTR_STRCT
112check_error 'f vfs_read file->^foo'		# NO_BTF_FIELD
113check_error 'f vfs_read file^-.foo'		# BAD_HYPHEN
114check_error 'f vfs_read ^file:string'		# BAD_TYPE4STR
115fi
116
117else
118check_error 'f vfs_read ^$arg*'			# NOSUP_BTFARG
119check_error 't kfree ^$arg*'			# NOSUP_BTFARG
120fi
121
122exit 0
123