181 строка
4.1 KiB
Bash
Executable File
181 строка
4.1 KiB
Bash
Executable File
#!/bin/sh
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# SPDX-License-Identifier: GPL-2.0
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ATOMICDIR=$(dirname $0)
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. ${ATOMICDIR}/atomic-tbl.sh
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#gen_param_check(meta, arg)
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gen_param_check()
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{
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local meta="$1"; shift
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local arg="$1"; shift
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local type="${arg%%:*}"
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local name="$(gen_param_name "${arg}")"
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local rw="write"
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case "${type#c}" in
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i) return;;
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esac
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if [ ${type#c} != ${type} ]; then
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# We don't write to constant parameters.
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rw="read"
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elif [ "${meta}" != "s" ]; then
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# An atomic RMW: if this parameter is not a constant, and this atomic is
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# not just a 's'tore, this parameter is both read from and written to.
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rw="read_write"
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fi
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printf "\tinstrument_atomic_${rw}(${name}, sizeof(*${name}));\n"
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}
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#gen_params_checks(meta, arg...)
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gen_params_checks()
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{
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local meta="$1"; shift
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local order="$1"; shift
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if [ "${order}" = "_release" ]; then
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printf "\tkcsan_release();\n"
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elif [ -z "${order}" ] && ! meta_in "$meta" "slv"; then
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# RMW with return value is fully ordered
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printf "\tkcsan_mb();\n"
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fi
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while [ "$#" -gt 0 ]; do
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gen_param_check "$meta" "$1"
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shift;
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done
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}
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#gen_proto_order_variant(meta, pfx, name, sfx, order, atomic, int, arg...)
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gen_proto_order_variant()
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{
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local meta="$1"; shift
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local pfx="$1"; shift
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local name="$1"; shift
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local sfx="$1"; shift
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local order="$1"; shift
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local atomic="$1"; shift
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local int="$1"; shift
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local atomicname="${atomic}_${pfx}${name}${sfx}${order}"
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local ret="$(gen_ret_type "${meta}" "${int}")"
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local params="$(gen_params "${int}" "${atomic}" "$@")"
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local checks="$(gen_params_checks "${meta}" "${order}" "$@")"
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local args="$(gen_args "$@")"
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local retstmt="$(gen_ret_stmt "${meta}")"
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gen_kerneldoc "" "${meta}" "${pfx}" "${name}" "${sfx}" "${order}" "${atomic}" "${int}" "$@"
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cat <<EOF
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static __always_inline ${ret}
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${atomicname}(${params})
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{
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${checks}
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${retstmt}raw_${atomicname}(${args});
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}
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EOF
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printf "\n"
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}
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gen_xchg()
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{
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local xchg="$1"; shift
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local order="$1"; shift
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kcsan_barrier=""
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if [ "${xchg%_local}" = "${xchg}" ]; then
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case "$order" in
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_release) kcsan_barrier="kcsan_release()" ;;
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"") kcsan_barrier="kcsan_mb()" ;;
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esac
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fi
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if [ "${xchg%${xchg#try_cmpxchg}}" = "try_cmpxchg" ] ; then
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cat <<EOF
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#define ${xchg}${order}(ptr, oldp, ...) \\
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({ \\
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typeof(ptr) __ai_ptr = (ptr); \\
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typeof(oldp) __ai_oldp = (oldp); \\
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EOF
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[ -n "$kcsan_barrier" ] && printf "\t${kcsan_barrier}; \\\\\n"
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cat <<EOF
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instrument_atomic_read_write(__ai_ptr, sizeof(*__ai_ptr)); \\
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instrument_read_write(__ai_oldp, sizeof(*__ai_oldp)); \\
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raw_${xchg}${order}(__ai_ptr, __ai_oldp, __VA_ARGS__); \\
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})
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EOF
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else
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cat <<EOF
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#define ${xchg}${order}(ptr, ...) \\
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({ \\
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typeof(ptr) __ai_ptr = (ptr); \\
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EOF
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[ -n "$kcsan_barrier" ] && printf "\t${kcsan_barrier}; \\\\\n"
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cat <<EOF
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instrument_atomic_read_write(__ai_ptr, sizeof(*__ai_ptr)); \\
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raw_${xchg}${order}(__ai_ptr, __VA_ARGS__); \\
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})
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EOF
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fi
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}
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cat << EOF
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// SPDX-License-Identifier: GPL-2.0
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// Generated by $0
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// DO NOT MODIFY THIS FILE DIRECTLY
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/*
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* This file provoides atomic operations with explicit instrumentation (e.g.
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* KASAN, KCSAN), which should be used unless it is necessary to avoid
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* instrumentation. Where it is necessary to aovid instrumenation, the
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* raw_atomic*() operations should be used.
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*/
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#ifndef _LINUX_ATOMIC_INSTRUMENTED_H
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#define _LINUX_ATOMIC_INSTRUMENTED_H
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#include <linux/build_bug.h>
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#include <linux/compiler.h>
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#include <linux/instrumented.h>
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EOF
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grep '^[a-z]' "$1" | while read name meta args; do
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gen_proto "${meta}" "${name}" "atomic" "int" ${args}
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done
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grep '^[a-z]' "$1" | while read name meta args; do
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gen_proto "${meta}" "${name}" "atomic64" "s64" ${args}
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done
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grep '^[a-z]' "$1" | while read name meta args; do
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gen_proto "${meta}" "${name}" "atomic_long" "long" ${args}
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done
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for xchg in "xchg" "cmpxchg" "cmpxchg64" "cmpxchg128" "try_cmpxchg" "try_cmpxchg64" "try_cmpxchg128"; do
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for order in "" "_acquire" "_release" "_relaxed"; do
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gen_xchg "${xchg}" "${order}"
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printf "\n"
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done
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done
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for xchg in "cmpxchg_local" "cmpxchg64_local" "cmpxchg128_local" "sync_cmpxchg" "try_cmpxchg_local" "try_cmpxchg64_local" "try_cmpxchg128_local"; do
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gen_xchg "${xchg}" ""
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printf "\n"
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done
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cat <<EOF
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#endif /* _LINUX_ATOMIC_INSTRUMENTED_H */
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EOF
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