1#!/bin/sh 2# SPDX-License-Identifier: GPL-2.0 3# description: Kprobe event parser error log check 4# requires: kprobe_events error_log 5 6check_error() { # command-with-error-pos-by-^ 7 ftrace_errlog_check 'trace_kprobe' "$1" 'kprobe_events' 8} 9 10if grep -q 'r\[maxactive\]' README; then 11check_error 'p^100 vfs_read' # MAXACT_NO_KPROBE 12check_error 'r^1a111 vfs_read' # BAD_MAXACT 13check_error 'r^100000 vfs_read' # MAXACT_TOO_BIG 14fi 15 16check_error 'p ^non_exist_func' # BAD_PROBE_ADDR (enoent) 17check_error 'p ^hoge-fuga' # BAD_PROBE_ADDR (bad syntax) 18check_error 'p ^hoge+1000-1000' # BAD_PROBE_ADDR (bad syntax) 19check_error 'r ^vfs_read+10' # BAD_RETPROBE 20check_error 'p:^/bar vfs_read' # NO_GROUP_NAME 21check_error 'p:^12345678901234567890123456789012345678901234567890123456789012345/bar vfs_read' # GROUP_TOO_LONG 22 23check_error 'p:^foo.1/bar vfs_read' # BAD_GROUP_NAME 24check_error 'p:foo/^12345678901234567890123456789012345678901234567890123456789012345 vfs_read' # EVENT_TOO_LONG 25check_error 'p:foo/^bar.1 vfs_read' # BAD_EVENT_NAME 26 27check_error 'p vfs_read ^$retval' # RETVAL_ON_PROBE 28check_error 'p vfs_read ^$stack10000' # BAD_STACK_NUM 29 30if grep -q '$arg<N>' README; then 31check_error 'p vfs_read ^$arg10000' # BAD_ARG_NUM 32fi 33 34check_error 'p vfs_read ^$none_var' # BAD_VAR 35 36check_error 'p vfs_read ^%none_reg' # BAD_REG_NAME 37check_error 'p vfs_read ^@12345678abcde' # BAD_MEM_ADDR 38check_error 'p vfs_read ^@+10' # FILE_ON_KPROBE 39 40grep -q "imm-value" README && \ 41check_error 'p vfs_read arg1=\^x' # BAD_IMM 42grep -q "imm-string" README && \ 43check_error 'p vfs_read arg1=\"abcd^' # IMMSTR_NO_CLOSE 44 45check_error 'p vfs_read ^+0@0)' # DEREF_NEED_BRACE 46check_error 'p vfs_read ^+0ab1(@0)' # BAD_DEREF_OFFS 47check_error 'p vfs_read +0(+0(@0^)' # DEREF_OPEN_BRACE 48 49if grep -A1 "fetcharg:" README | grep -q '\$comm' ; then 50check_error 'p vfs_read +0(^$comm)' # COMM_CANT_DEREF 51fi 52 53check_error 'p vfs_read ^&1' # BAD_FETCH_ARG 54 55 56# We've introduced this limitation with array support 57if grep -q ' <type>\\\[<array-size>\\\]' README; then 58check_error 'p vfs_read +0(^+0(+0(+0(+0(+0(+0(+0(+0(+0(+0(+0(+0(+0(@0))))))))))))))' # TOO_MANY_OPS? 59check_error 'p vfs_read +0(@11):u8[10^' # ARRAY_NO_CLOSE 60check_error 'p vfs_read +0(@11):u8[10]^a' # BAD_ARRAY_SUFFIX 61check_error 'p vfs_read +0(@11):u8[^10a]' # BAD_ARRAY_NUM 62check_error 'p vfs_read +0(@11):u8[^256]' # ARRAY_TOO_BIG 63fi 64 65check_error 'p vfs_read @11:^unknown_type' # BAD_TYPE 66check_error 'p vfs_read $stack0:^string' # BAD_STRING 67check_error 'p vfs_read @11:^b10@a/16' # BAD_BITFIELD 68 69check_error 'p vfs_read ^arg123456789012345678901234567890=@11' # ARG_NAME_TOO_LOG 70check_error 'p vfs_read ^=@11' # NO_ARG_NAME 71check_error 'p vfs_read ^var.1=@11' # BAD_ARG_NAME 72check_error 'p vfs_read var1=@11 ^var1=@12' # USED_ARG_NAME 73check_error 'p vfs_read ^+1234567(+1234567(+1234567(+1234567(+1234567(+1234567(@1234))))))' # ARG_TOO_LONG 74check_error 'p vfs_read arg1=^' # NO_ARG_BODY 75 76# instruction boundary check is valid on x86 (at this moment) 77case $(uname -m) in 78 x86_64|i[3456]86) 79 echo 'p vfs_read' > kprobe_events 80 if grep -q FTRACE ../kprobes/list ; then 81 check_error 'p ^vfs_read+3' # BAD_INSN_BNDRY (only if function-tracer is enabled) 82 fi 83 ;; 84esac 85 86# multiprobe errors 87if grep -q "Create/append/" README && grep -q "imm-value" README; then 88echo "p:kprobes/testevent $FUNCTION_FORK" > kprobe_events 89check_error '^r:kprobes/testevent do_exit' # DIFF_PROBE_TYPE 90 91# Explicitly use printf "%s" to not interpret \1 92printf "%s" "p:kprobes/testevent $FUNCTION_FORK abcd=\\1" > kprobe_events 93check_error "p:kprobes/testevent $FUNCTION_FORK ^bcd=\\1" # DIFF_ARG_TYPE 94check_error "p:kprobes/testevent $FUNCTION_FORK ^abcd=\\1:u8" # DIFF_ARG_TYPE 95check_error "p:kprobes/testevent $FUNCTION_FORK ^abcd=\\\"foo\"" # DIFF_ARG_TYPE 96check_error "^p:kprobes/testevent $FUNCTION_FORK abcd=\\1" # SAME_PROBE 97fi 98 99# %return suffix errors 100if grep -q "place (kretprobe): .*%return.*" README; then 101check_error 'p vfs_read^%hoge' # BAD_ADDR_SUFFIX 102check_error 'p ^vfs_read+10%return' # BAD_RETPROBE 103fi 104 105exit 0 106