From patchwork Thu Jul 20 16:10:53 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Giuliano Procida X-Patchwork-Id: 704596 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id EE051EB64DC for ; Thu, 20 Jul 2023 16:11:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229630AbjGTQLI (ORCPT ); Thu, 20 Jul 2023 12:11:08 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43178 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229536AbjGTQLH (ORCPT ); Thu, 20 Jul 2023 12:11:07 -0400 Received: from mail-yw1-x114a.google.com (mail-yw1-x114a.google.com [IPv6:2607:f8b0:4864:20::114a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 34D5F114 for ; Thu, 20 Jul 2023 09:11:06 -0700 (PDT) Received: by mail-yw1-x114a.google.com with SMTP id 00721157ae682-577323ba3d5so33270987b3.0 for ; Thu, 20 Jul 2023 09:11:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20221208; t=1689869465; x=1690474265; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=Qp196USLnAy4LTAkpGzxnXfWsR6U5xBzW1Ke9Zcywm4=; b=0xJVu/W/3xHLwIgQt4AdT6cR/YUtiNdLdmQJXkVP0EBEOh0s1C8pMSYPVmVX56g0qL iY14aVUZXceX1+sSx47/A3Oz42zFfT6/iI72X+dHAkxW9xroRWzw6ItifadoKfASJ3u8 hBpU/RpuzpltTY33o0ZEKscU+ZkWmBRLI+L2oSSkqem1In1o/8kvyeLQtZwigN3E10vS NgK9xlM5rN/Z00gvjRghEprD9TdNy5Vmx8iwjIOd4Y+GZ8uG8ZEDfW1U7NXUAb9hO2fz tMytb0jSh5n09x1tTZWMd313KeCvKYZeX3DaeKAhaFjFGLwW9FuzHttvsRB6eaajnMdp HzOw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1689869465; x=1690474265; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=Qp196USLnAy4LTAkpGzxnXfWsR6U5xBzW1Ke9Zcywm4=; b=FzJa2p0IRHQ+AkolouG00thFn3X1dvc+VUryFli9D4IBWA4pQhCw6YSwZc6k2SXiHI FVGSFZlUJuyyxkIw8OFtoSUOmOVA0bnFA4s4fdZAAyl0IS3Y/QcGE/1hBVxN8QzPuejm sDdA+QpfI7CBdZWVlVq7goZfPBpV4x/UhULMh5ykkoudiKnj40rjTZmx+d+ihKPeYa5V 83Te8Xxp7hlg1hAUX+apT5sMdN/K57rNdrpziNir2Lg645U8R7dEgVSkx7HlegEUJx0M SfrF3NQH0JmY//9xZE4O6nf63X4mtmM0DVkuRTXvau17ZV2Al21Dum5FdzMEZE/RSt1G TcYg== X-Gm-Message-State: ABy/qLbhav9/0pxoEBrUrPx+c1x9eepuMnz6ppzSL52p7iMrHI0tNnsb 3aZUPhD0trluZDGHKvwWjY+PUx8E1Hpi+g== X-Google-Smtp-Source: APBJJlEiVEmuesw68z+x28qFD4ReuJRNuf+WB6wQmhi/bG4Ofb/elfxoE7pV67Grv8RRZAJJig+fwLf/UqbQFQ== X-Received: from tef.lon.corp.google.com ([2a00:79e0:d:209:c4c4:9486:83f9:4510]) (user=gprocida job=sendgmr) by 2002:a5b:349:0:b0:ceb:324c:ba8e with SMTP id q9-20020a5b0349000000b00ceb324cba8emr77473ybp.4.1689869465517; Thu, 20 Jul 2023 09:11:05 -0700 (PDT) Date: Thu, 20 Jul 2023 17:10:53 +0100 In-Reply-To: <20230407203456.27141-2-quic_johmoo@quicinc.com> Mime-Version: 1.0 References: <20230407203456.27141-2-quic_johmoo@quicinc.com> X-Mailer: git-send-email 2.41.0.255.g8b1d071c50-goog Message-ID: <20230720161053.1213680-1-gprocida@google.com> Subject: [PATCH] scripts/check-uapi.sh: add stgdiff support From: Giuliano Procida To: quic_johmoo@quicinc.com Cc: masahiroy@kernel.org, nathan@kernel.org, ndesaulniers@google.com, nicolas@fjasle.eu, linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org, gregkh@linuxfoundation.org, rdunlap@infradead.org, arnd@arndb.de, andersson@kernel.org, tkjos@google.com, maennich@google.com, gprocida@google.com, kernel-team@android.com, libabigail@sourceware.org, jorcrous@amazon.com, quic_tsoni@quicinc.com, quic_satyap@quicinc.com, quic_eberman@quicinc.com, quic_gurus@quicinc.com Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Hi John. I spent a few minutes adding stgdiff support to the script. It's really just for illustration purposes. As I think you know, STG doesn't yet exist as a project outside of AOSP. Nevertheless, this may be useful to you as-is. STG has quite a different philosophy to libabigil in terms of filtering out certain kinds of differences. Some of the things (like enum enumerator additions) are not considered harmless. The reasoning behind this is basically... https://en.wikipedia.org/wiki/Covariance_and_contravariance_(computer_science) However, it does have --ignore interface_addition (and the related --ignore type_definition_addition) which can be used to detect whether one ABI is a subset of another. I am looking at adding support for macro definitions (gcc -g3) to STG which will then let us cover significantly more of the UAPI surface. Unfortunately, there are some headers which use anonymous enums to define constants (e.g. and ironically BTF). ABI tracking these types would require something a bit hacky. Or we could just name them. Regards, Giuliano. Signed-off-by: Giuliano Procida --- scripts/check-uapi.sh | 102 ++++++++++++++++++++++++++++-------------- 1 file changed, 69 insertions(+), 33 deletions(-) diff --git a/scripts/check-uapi.sh b/scripts/check-uapi.sh index 755187f27be5..982666b48f3b 100755 --- a/scripts/check-uapi.sh +++ b/scripts/check-uapi.sh @@ -32,6 +32,7 @@ Options: -v Verbose operation (print more information about each header being checked). Environmental args: + STGDIFF Custom path to stgdiff binary - use stgdiff instead of abidiff ABIDIFF Custom path to abidiff binary CC C compiler (default is "gcc") ARCH Target architecture of C compiler (default is host arch) @@ -270,43 +271,78 @@ compare_abi() { exit "$FAIL_COMPILE" fi - local ret=0 - "$ABIDIFF" --non-reachable-types "${past_header}.bin" "${base_header}.bin" > "$log" || ret="$?" - if [ "$ret" -eq 0 ]; then - if [ "$VERBOSE" = "true" ]; then - printf "No ABI differences detected in %s from %s -> %s\n" "$file" "$past_ref" "${base_ref:-dirty tree}" + if [ "$STGDIFF" ]; then + local ret=0 + "$STGDIFF" --types --ignore interface_addition --elf "${past_header}.bin" "${base_header}.bin" --format small --output "$log" || ret="$?" + if [ "$ret" -eq 0 ]; then + if [ "$VERBOSE" = "true" ]; then + printf "No ABI differences detected in %s from %s -> %s\n" "$file" "$past_ref" "${base_ref:-dirty tree}" + fi + else + # stgdiff's return code can be used to determine the type of error + if [ $((ret & 0x1)) -gt 0 ]; then + eprintf "error - stgdiff failed\n" + exit 1 + fi + + { + printf "!!! ABI differences detected in %s from %s -> %s !!!\n\n" "$file" "$past_ref" "${base_ref:-dirty tree}" + sed -e 's/^/ /g' "$log" + + if ! cmp "$past_header" "$base_header" > /dev/null 2>&1; then + printf "\nHeader file diff (after headers_install):\n" + diff -Naur "$past_header" "$base_header" \ + | sed -e "s|${past_header}|${past_ref}/${file}|g" \ + -e "s|${base_header}|${base_ref:-dirty}/${file}|g" + printf "\n" + else + printf "\n%s did not change between %s and %s...\n" "$file" "$past_ref" "${base_ref:-dirty tree}" + printf "It's possible a change to one of the headers it includes caused this error:\n" + grep '^#include' "$base_header" + printf "\n" + fi + } | tee "${base_header}.error" >&2 + return 1 fi else - # Bits in abidiff's return code can be used to determine the type of error - if [ $((ret & 0x1)) -gt 0 ]; then - eprintf "error - abidiff did not run properly\n" - exit 1 - fi + local ret=0 + "$ABIDIFF" --non-reachable-types "${past_header}.bin" "${base_header}.bin" > "$log" || ret="$?" + if [ "$ret" -eq 0 ]; then + if [ "$VERBOSE" = "true" ]; then + printf "No ABI differences detected in %s from %s -> %s\n" "$file" "$past_ref" "${base_ref:-dirty tree}" + fi + else + # Bits in abidiff's return code can be used to determine the type of error + if [ $((ret & 0x1)) -gt 0 ]; then + eprintf "error - abidiff did not run properly\n" + exit 1 + fi - # If the only changes were additions (not modifications to existing APIs), then - # there's no problem. Ignore these diffs. - if grep "Unreachable types summary" "$log" | grep -q "0 removed" && - grep "Unreachable types summary" "$log" | grep -q "0 changed"; then - return 0 - fi - { - printf "!!! ABI differences detected in %s from %s -> %s !!!\n\n" "$file" "$past_ref" "${base_ref:-dirty tree}" - sed -e '/summary:/d' -e '/changed type/d' -e '/^$/d' -e 's/^/ /g' "$log" - - if ! cmp "$past_header" "$base_header" > /dev/null 2>&1; then - printf "\nHeader file diff (after headers_install):\n" - diff -Naur "$past_header" "$base_header" \ - | sed -e "s|${past_header}|${past_ref}/${file}|g" \ - -e "s|${base_header}|${base_ref:-dirty}/${file}|g" - printf "\n" - else - printf "\n%s did not change between %s and %s...\n" "$file" "$past_ref" "${base_ref:-dirty tree}" - printf "It's possible a change to one of the headers it includes caused this error:\n" - grep '^#include' "$base_header" - printf "\n" + # If the only changes were additions (not modifications to existing APIs), then + # there's no problem. Ignore these diffs. + if grep "Unreachable types summary" "$log" | grep -q "0 removed" && + grep "Unreachable types summary" "$log" | grep -q "0 changed"; then + return 0 fi - } | tee "${base_header}.error" >&2 - return 1 + { + printf "!!! ABI differences detected in %s from %s -> %s !!!\n\n" "$file" "$past_ref" "${base_ref:-dirty tree}" + sed -e '/summary:/d' -e '/changed type/d' -e '/^$/d' -e 's/^/ /g' "$log" + + if ! cmp "$past_header" "$base_header" > /dev/null 2>&1; then + printf "\nHeader file diff (after headers_install):\n" + diff -Naur "$past_header" "$base_header" \ + | sed -e "s|${past_header}|${past_ref}/${file}|g" \ + -e "s|${base_header}|${base_ref:-dirty}/${file}|g" + printf "\n" + else + printf "\n%s did not change between %s and %s...\n" "$file" "$past_ref" "${base_ref:-dirty tree}" + printf "It's possible a change to one of the headers it includes caused this error:\n" + grep '^#include' "$base_header" + printf "\n" + fi + } | tee "${base_header}.error" >&2 + return 1 + fi fi }