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