#!/bin/sh
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# SPDX-License-Identifier: GPL-2.0
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# description: Kprobe event parser error log check
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# requires: kprobe_events error_log
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check_error() { # command-with-error-pos-by-^
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ftrace_errlog_check 'trace_kprobe' "$1" 'kprobe_events'
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}
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if grep -q 'r\[maxactive\]' README; then
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check_error 'p^100 vfs_read' # MAXACT_NO_KPROBE
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check_error 'r^1a111 vfs_read' # BAD_MAXACT
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check_error 'r^100000 vfs_read' # MAXACT_TOO_BIG
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fi
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check_error 'p ^non_exist_func' # BAD_PROBE_ADDR (enoent)
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check_error 'p ^hoge-fuga' # BAD_PROBE_ADDR (bad syntax)
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check_error 'p ^hoge+1000-1000' # BAD_PROBE_ADDR (bad syntax)
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check_error 'r ^vfs_read+10' # BAD_RETPROBE
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check_error 'p:^/bar vfs_read' # NO_GROUP_NAME
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check_error 'p:^12345678901234567890123456789012345678901234567890123456789012345/bar vfs_read' # GROUP_TOO_LONG
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check_error 'p:^foo.1/bar vfs_read' # BAD_GROUP_NAME
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check_error 'p:foo/^12345678901234567890123456789012345678901234567890123456789012345 vfs_read' # EVENT_TOO_LONG
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check_error 'p:foo/^bar.1 vfs_read' # BAD_EVENT_NAME
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check_error 'p vfs_read ^$retval' # RETVAL_ON_PROBE
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check_error 'p vfs_read ^$stack10000' # BAD_STACK_NUM
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if grep -q '$arg<N>' README; then
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check_error 'p vfs_read ^$arg10000' # BAD_ARG_NUM
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fi
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check_error 'p vfs_read ^$none_var' # BAD_VAR
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check_error 'p vfs_read ^%none_reg' # BAD_REG_NAME
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check_error 'p vfs_read ^@12345678abcde' # BAD_MEM_ADDR
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check_error 'p vfs_read ^@+10' # FILE_ON_KPROBE
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grep -q "imm-value" README && \
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check_error 'p vfs_read arg1=\^x' # BAD_IMM
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grep -q "imm-string" README && \
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check_error 'p vfs_read arg1=\"abcd^' # IMMSTR_NO_CLOSE
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check_error 'p vfs_read ^+0@0)' # DEREF_NEED_BRACE
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check_error 'p vfs_read ^+0ab1(@0)' # BAD_DEREF_OFFS
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check_error 'p vfs_read +0(+0(@0^)' # DEREF_OPEN_BRACE
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if grep -A1 "fetcharg:" README | grep -q '\$comm' ; then
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check_error 'p vfs_read +0(^$comm)' # COMM_CANT_DEREF
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fi
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check_error 'p vfs_read ^&1' # BAD_FETCH_ARG
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# We've introduced this limitation with array support
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if grep -q ' <type>\\\[<array-size>\\\]' README; then
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check_error 'p vfs_read +0(^+0(+0(+0(+0(+0(+0(+0(+0(+0(+0(+0(+0(+0(@0))))))))))))))' # TOO_MANY_OPS?
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check_error 'p vfs_read +0(@11):u8[10^' # ARRAY_NO_CLOSE
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check_error 'p vfs_read +0(@11):u8[10]^a' # BAD_ARRAY_SUFFIX
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check_error 'p vfs_read +0(@11):u8[^10a]' # BAD_ARRAY_NUM
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check_error 'p vfs_read +0(@11):u8[^256]' # ARRAY_TOO_BIG
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fi
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check_error 'p vfs_read @11:^unknown_type' # BAD_TYPE
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check_error 'p vfs_read $stack0:^string' # BAD_STRING
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check_error 'p vfs_read @11:^b10@a/16' # BAD_BITFIELD
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check_error 'p vfs_read ^arg123456789012345678901234567890=@11' # ARG_NAME_TOO_LOG
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check_error 'p vfs_read ^=@11' # NO_ARG_NAME
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check_error 'p vfs_read ^var.1=@11' # BAD_ARG_NAME
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check_error 'p vfs_read var1=@11 ^var1=@12' # USED_ARG_NAME
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check_error 'p vfs_read ^+1234567(+1234567(+1234567(+1234567(+1234567(+1234567(@1234))))))' # ARG_TOO_LONG
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check_error 'p vfs_read arg1=^' # NO_ARG_BODY
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# instruction boundary check is valid on x86 (at this moment)
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case $(uname -m) in
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x86_64|i[3456]86)
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echo 'p vfs_read' > kprobe_events
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if grep -q FTRACE ../kprobes/list ; then
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check_error 'p ^vfs_read+3' # BAD_INSN_BNDRY (only if function-tracer is enabled)
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fi
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;;
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esac
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# multiprobe errors
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if grep -q "Create/append/" README && grep -q "imm-value" README; then
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echo "p:kprobes/testevent $FUNCTION_FORK" > kprobe_events
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check_error '^r:kprobes/testevent do_exit' # DIFF_PROBE_TYPE
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# Explicitly use printf "%s" to not interpret \1
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printf "%s" "p:kprobes/testevent $FUNCTION_FORK abcd=\\1" > kprobe_events
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check_error "p:kprobes/testevent $FUNCTION_FORK ^bcd=\\1" # DIFF_ARG_TYPE
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check_error "p:kprobes/testevent $FUNCTION_FORK ^abcd=\\1:u8" # DIFF_ARG_TYPE
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check_error "p:kprobes/testevent $FUNCTION_FORK ^abcd=\\\"foo\"" # DIFF_ARG_TYPE
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check_error "^p:kprobes/testevent $FUNCTION_FORK abcd=\\1" # SAME_PROBE
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fi
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# %return suffix errors
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if grep -q "place (kretprobe): .*%return.*" README; then
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check_error 'p vfs_read^%hoge' # BAD_ADDR_SUFFIX
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check_error 'p ^vfs_read+10%return' # BAD_RETPROBE
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fi
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exit 0
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