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1#!/bin/sh2# SPDX-License-Identifier: GPL-2.03# description: Kprobe event parser error log check4# requires: kprobe_events error_log5 6check_error() { # command-with-error-pos-by-^7 ftrace_errlog_check 'trace_kprobe' "$1" 'kprobe_events'8}9 10if grep -q 'r\[maxactive\]' README; then11check_error 'p^100 vfs_read' # BAD_MAXACT_TYPE12check_error 'r^1a111 vfs_read' # BAD_MAXACT13check_error 'r^100000 vfs_read' # MAXACT_TOO_BIG14fi15 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_RETPROBE20check_error 'p:^/bar vfs_read' # NO_GROUP_NAME21check_error 'p:^12345678901234567890123456789012345678901234567890123456789012345/bar vfs_read' # GROUP_TOO_LONG22 23check_error 'p:^foo.1/bar vfs_read' # BAD_GROUP_NAME24check_error 'p:^ vfs_read' # NO_EVENT_NAME25check_error 'p:foo/^12345678901234567890123456789012345678901234567890123456789012345 vfs_read' # EVENT_TOO_LONG26check_error 'p:foo/^bar.1 vfs_read' # BAD_EVENT_NAME27 28check_error 'p vfs_read ^$retval' # RETVAL_ON_PROBE29check_error 'p vfs_read ^$stack10000' # BAD_STACK_NUM30 31if grep -q '$arg<N>' README; then32check_error 'p vfs_read ^$arg10000' # BAD_ARG_NUM33fi34 35check_error 'p vfs_read ^$none_var' # BAD_VAR36 37check_error 'p vfs_read ^%none_reg' # BAD_REG_NAME38check_error 'p vfs_read ^@12345678abcde' # BAD_MEM_ADDR39check_error 'p vfs_read ^@+10' # FILE_ON_KPROBE40 41grep -q "imm-value" README && \42check_error 'p vfs_read arg1=\^x' # BAD_IMM43grep -q "imm-string" README && \44check_error 'p vfs_read arg1=\"abcd^' # IMMSTR_NO_CLOSE45 46check_error 'p vfs_read ^+0@0)' # DEREF_NEED_BRACE47check_error 'p vfs_read ^+0ab1(@0)' # BAD_DEREF_OFFS48check_error 'p vfs_read +0(+0(@0^)' # DEREF_OPEN_BRACE49 50if grep -A1 "fetcharg:" README | grep -q '\$comm' ; then51check_error 'p vfs_read +0(^$comm)' # COMM_CANT_DEREF52fi53 54check_error 'p vfs_read ^&1' # BAD_FETCH_ARG55 56 57# We've introduced this limitation with array support58if grep -q ' <type>\\\[<array-size>\\\]' README; then59check_error 'p vfs_read +0(^+0(+0(+0(+0(+0(+0(+0(+0(+0(+0(+0(+0(+0(@0))))))))))))))' # TOO_MANY_OPS?60check_error 'p vfs_read +0(@11):u8[10^' # ARRAY_NO_CLOSE61check_error 'p vfs_read +0(@11):u8[10]^a' # BAD_ARRAY_SUFFIX62check_error 'p vfs_read +0(@11):u8[^10a]' # BAD_ARRAY_NUM63check_error 'p vfs_read +0(@11):u8[^256]' # ARRAY_TOO_BIG64fi65 66check_error 'p vfs_read @11:^unknown_type' # BAD_TYPE67check_error 'p vfs_read $stack0:^string' # BAD_STRING68check_error 'p vfs_read @11:^b10@a/16' # BAD_BITFIELD69 70check_error 'p vfs_read ^arg123456789012345678901234567890=@11' # ARG_NAME_TOO_LOG71check_error 'p vfs_read ^=@11' # NO_ARG_NAME72check_error 'p vfs_read ^var.1=@11' # BAD_ARG_NAME73check_error 'p vfs_read var1=@11 ^var1=@12' # USED_ARG_NAME74check_error 'p vfs_read ^+1234567(+1234567(+1234567(+1234567(+1234567(+1234567(@1234))))))' # ARG_TOO_LONG75check_error 'p vfs_read arg1=^' # NO_ARG_BODY76 77# instruction boundary check is valid on x86 (at this moment)78case $(uname -m) in79 x86_64|i[3456]86)80 echo 'p vfs_read' > kprobe_events81 if grep -q FTRACE ../kprobes/list ; then82 check_error 'p ^vfs_read+3' # BAD_INSN_BNDRY (only if function-tracer is enabled)83 fi84 ;;85esac86 87# multiprobe errors88if grep -q "Create/append/" README && grep -q "imm-value" README; then89echo "p:kprobes/testevent $FUNCTION_FORK" > kprobe_events90check_error '^r:kprobes/testevent do_exit' # DIFF_PROBE_TYPE91 92# Explicitly use printf "%s" to not interpret \193printf "%s" "p:kprobes/testevent $FUNCTION_FORK abcd=\\1" > kprobe_events94check_error "p:kprobes/testevent $FUNCTION_FORK ^bcd=\\1" # DIFF_ARG_TYPE95check_error "p:kprobes/testevent $FUNCTION_FORK ^abcd=\\1:u8" # DIFF_ARG_TYPE96check_error "p:kprobes/testevent $FUNCTION_FORK ^abcd=\\\"foo\"" # DIFF_ARG_TYPE97check_error "^p:kprobes/testevent $FUNCTION_FORK abcd=\\1" # SAME_PROBE98fi99 100# %return suffix errors101if grep -q "place (kretprobe): .*%return.*" README; then102check_error 'p vfs_read^%hoge' # BAD_ADDR_SUFFIX103check_error 'p ^vfs_read+10%return' # BAD_RETPROBE104fi105 106# BTF arguments errors107if grep -q "<argname>" README; then108check_error 'p vfs_read args=^$arg*' # BAD_VAR_ARGS109check_error 'p vfs_read +0(^$arg*)' # BAD_VAR_ARGS110check_error 'p vfs_read $arg* ^$arg*' # DOUBLE_ARGS111if !grep -q 'kernel return probes support:' README; then112check_error 'r vfs_read ^$arg*' # NOFENTRY_ARGS113fi114check_error 'p vfs_read+8 ^$arg*' # NOFENTRY_ARGS115check_error 'p vfs_read ^hoge' # NO_BTFARG116check_error 'p kfree ^$arg10' # NO_BTFARG (exceed the number of parameters)117check_error 'r kfree ^$retval' # NO_RETVAL118else119check_error 'p vfs_read ^$arg*' # NOSUP_BTFARG120fi121 122exit 0123