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GET /api/patches/2226168/?format=api
{ "id": 2226168, "url": "http://patchwork.ozlabs.org/api/patches/2226168/?format=api", "web_url": "http://patchwork.ozlabs.org/project/gcc/patch/bmm.hhub2sjuj4.gcc.gcc-TEST.redi.10.1.1@forge-stage.sourceware.org/", "project": { "id": 17, "url": "http://patchwork.ozlabs.org/api/projects/17/?format=api", "name": "GNU Compiler Collection", "link_name": "gcc", "list_id": "gcc-patches.gcc.gnu.org", "list_email": "gcc-patches@gcc.gnu.org", "web_url": null, "scm_url": null, "webscm_url": null, "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<bmm.hhub2sjuj4.gcc.gcc-TEST.redi.10.1.1@forge-stage.sourceware.org>", "list_archive_url": null, "date": "2026-04-22T10:19:29", "name": "[v1,1/1] libstdc++: Add align_alloc attribute to aligned operator new", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "a7f27fc745057702803a6f189feda5dbc585fe25", "submitter": { "id": 93210, "url": "http://patchwork.ozlabs.org/api/people/93210/?format=api", "name": "Jonathan Wakely via Sourceware Forge", "email": "forge-bot+redi@forge-stage.sourceware.org" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/gcc/patch/bmm.hhub2sjuj4.gcc.gcc-TEST.redi.10.1.1@forge-stage.sourceware.org/mbox/", "series": [ { "id": 500960, "url": "http://patchwork.ozlabs.org/api/series/500960/?format=api", "web_url": "http://patchwork.ozlabs.org/project/gcc/list/?series=500960", "date": "2026-04-22T10:19:29", "name": "libstdc++: Add align_alloc attribute to aligned operator new", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/500960/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2226168/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2226168/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<gcc-patches-bounces~incoming=patchwork.ozlabs.org@gcc.gnu.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "gcc-patches@gcc.gnu.org" ], "Delivered-To": [ "patchwork-incoming@legolas.ozlabs.org", "gcc-patches@gcc.gnu.org" ], "Authentication-Results": [ "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=gcc.gnu.org\n (client-ip=38.145.34.32; helo=vm01.sourceware.org;\n envelope-from=gcc-patches-bounces~incoming=patchwork.ozlabs.org@gcc.gnu.org;\n receiver=patchwork.ozlabs.org)", "sourceware.org; dmarc=none (p=none dis=none)\n header.from=forge-stage.sourceware.org", "sourceware.org;\n spf=pass smtp.mailfrom=forge-stage.sourceware.org", "server2.sourceware.org;\n arc=none smtp.remote-ip=38.145.34.39" ], "Received": [ "from vm01.sourceware.org (vm01.sourceware.org [38.145.34.32])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\t key-exchange x25519 server-signature ECDSA (secp384r1) server-digest SHA384)\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4g0wNz1xzDz1yCv\n\tfor <incoming@patchwork.ozlabs.org>; Wed, 22 Apr 2026 20:26:11 +1000 (AEST)", "from vm01.sourceware.org (localhost [127.0.0.1])\n\tby sourceware.org (Postfix) with ESMTP id C4AC64BBCDBE\n\tfor <incoming@patchwork.ozlabs.org>; Wed, 22 Apr 2026 10:26:08 +0000 (GMT)", "from forge-stage.sourceware.org (vm08.sourceware.org [38.145.34.39])\n by sourceware.org (Postfix) with ESMTPS id 7E9A24BB3B85\n for <gcc-patches@gcc.gnu.org>; Wed, 22 Apr 2026 10:20:23 +0000 (GMT)", "from forge-stage.sourceware.org (localhost [IPv6:::1])\n (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n key-exchange x25519 server-signature ECDSA (prime256v1) server-digest SHA256)\n (No client certificate requested)\n by forge-stage.sourceware.org (Postfix) with ESMTPS id 535634055E\n for <gcc-patches@gcc.gnu.org>; Wed, 22 Apr 2026 10:20:23 +0000 (UTC)" ], "DKIM-Filter": [ "OpenDKIM Filter v2.11.0 sourceware.org C4AC64BBCDBE", "OpenDKIM Filter v2.11.0 sourceware.org 7E9A24BB3B85" ], "DMARC-Filter": "OpenDMARC Filter v1.4.2 sourceware.org 7E9A24BB3B85", "ARC-Filter": "OpenARC Filter v1.0.0 sourceware.org 7E9A24BB3B85", "ARC-Seal": "i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1776853223; cv=none;\n b=X2Zly2XUy0afaGLA6mcfxWyTHWV1lLednF/aW4LpNqwJ9fYJVHQvNVZYzBVi5kCXDrW7EEnD7Hg0jxzeGd0JPoUKJTismP60vfQL52UbJwYGbbqJ1WRACjNt69CwfuNyw0esNZ2M5RdaSDhsLekbsq5fz6T3kd7C81vzhEzcWI4=", "ARC-Message-Signature": "i=1; a=rsa-sha256; d=sourceware.org; s=key;\n t=1776853223; c=relaxed/simple;\n bh=mW3ykwku/AZNq7yMMmWAdZEN8KGXkBlRZCGpTcv39M4=;\n h=From:Date:Subject:To:Message-ID;\n b=XlCVRCHgN3eKj3cJyLaIsJnYj1D9XOK8MAYoZLqy87VDq9bG3VdugX7iJ08I5ltNNVi1CLYJyZ3VfU/85b6Wn3aIn1sOeKTdsKl/XrrPKG65SXbB+c1WzNnUzRP3scGoS9Jf8KW/ngzKrdI6imAnQbrXjPoUtkeG4yXJLG4zC4I=", "ARC-Authentication-Results": "i=1; server2.sourceware.org", "From": "Jonathan Wakely via Sourceware Forge\n <forge-bot+redi@forge-stage.sourceware.org>", "Date": "Wed, 22 Apr 2026 10:19:29 +0000", "Subject": "[PATCH v1 1/1] libstdc++: Add align_alloc attribute to aligned\n operator new", "To": "gcc-patches mailing list <gcc-patches@gcc.gnu.org>", "Message-ID": "\n <bmm.hhub2sjuj4.gcc.gcc-TEST.redi.10.1.1@forge-stage.sourceware.org>", "X-Mailer": "batrachomyomachia", "X-Pull-Request-Organization": "gcc", "X-Pull-Request-Repository": "gcc-TEST", "X-Pull-Request": "https://forge.sourceware.org/gcc/gcc-TEST/pulls/10", "References": "\n <bmm.hhub2sjuj4.gcc.gcc-TEST.redi.10.1.0@forge-stage.sourceware.org>", "In-Reply-To": "\n <bmm.hhub2sjuj4.gcc.gcc-TEST.redi.10.1.0@forge-stage.sourceware.org>", "X-Patch-URL": "\n https://forge.sourceware.org/redi/gcc/commit/f0bfdb357d6bf4f3ea82b5e6baecd30cfed971bf", "X-BeenThere": "gcc-patches@gcc.gnu.org", "X-Mailman-Version": "2.1.30", "Precedence": "list", "List-Id": "Gcc-patches mailing list <gcc-patches.gcc.gnu.org>", "List-Unsubscribe": "<https://gcc.gnu.org/mailman/options/gcc-patches>,\n <mailto:gcc-patches-request@gcc.gnu.org?subject=unsubscribe>", "List-Archive": "<https://gcc.gnu.org/pipermail/gcc-patches/>", "List-Post": "<mailto:gcc-patches@gcc.gnu.org>", "List-Help": "<mailto:gcc-patches-request@gcc.gnu.org?subject=help>", "List-Subscribe": "<https://gcc.gnu.org/mailman/listinfo/gcc-patches>,\n <mailto:gcc-patches-request@gcc.gnu.org?subject=subscribe>", "Reply-To": "gcc-patches mailing list <gcc-patches@gcc.gnu.org>, redi@gcc.gnu.org", "Errors-To": "gcc-patches-bounces~incoming=patchwork.ozlabs.org@gcc.gnu.org" }, "content": "From: Jonathan Wakely <jwakely@redhat.com>\n\nThe aligned versions of operator new should use the align_alloc\nattribute to help the compiler.\n\nPR c++/86878 requests that the compiler would use the attribute to warn\nabout invalid attributes, so an XFAILed test is added for that.\n\nlibstdc++-v3/ChangeLog:\n\n\t* libsupc++/new (operator new): Add attribute align_alloc(2) to\n\toverloads taking a std::align_val_t argument.\n\t* testsuite/18_support/new_aligned_warn.cc: New test.\n---\n libstdc++-v3/libsupc++/new | 6 +++---\n .../testsuite/18_support/new_aligned_warn.cc | 13 +++++++++++++\n 2 files changed, 16 insertions(+), 3 deletions(-)\n create mode 100644 libstdc++-v3/testsuite/18_support/new_aligned_warn.cc", "diff": "diff --git a/libstdc++-v3/libsupc++/new b/libstdc++-v3/libsupc++/new\nindex e9a3d9b49a3e..4345030071bb 100644\n--- a/libstdc++-v3/libsupc++/new\n+++ b/libstdc++-v3/libsupc++/new\n@@ -167,7 +167,7 @@ void operator delete[](void*, const std::nothrow_t&)\n #if __cpp_aligned_new\n _GLIBCXX_NODISCARD void* operator new(std::size_t, std::align_val_t)\n _GLIBCXX_TXN_SAFE\n- __attribute__((__externally_visible__, __alloc_size__ (1), __malloc__));\n+ __attribute__((__externally_visible__, __alloc_size__ (1), __alloc_align__ (2), __malloc__));\n _GLIBCXX_NODISCARD void* operator new(std::size_t, std::align_val_t, const std::nothrow_t&)\n _GLIBCXX_TXN_SAFE\n _GLIBCXX_USE_NOEXCEPT __attribute__((__externally_visible__, __alloc_size__ (1), __malloc__));\n@@ -178,10 +178,10 @@ void operator delete(void*, std::align_val_t, const std::nothrow_t&)\n _GLIBCXX_USE_NOEXCEPT __attribute__((__externally_visible__));\n _GLIBCXX_NODISCARD void* operator new[](std::size_t, std::align_val_t)\n _GLIBCXX_TXN_SAFE\n- __attribute__((__externally_visible__, __alloc_size__ (1), __malloc__));\n+ __attribute__((__externally_visible__, __alloc_size__ (1), __alloc_align__ (2), __malloc__));\n _GLIBCXX_NODISCARD void* operator new[](std::size_t, std::align_val_t, const std::nothrow_t&)\n _GLIBCXX_TXN_SAFE\n- _GLIBCXX_USE_NOEXCEPT __attribute__((__externally_visible__, __alloc_size__ (1), __malloc__));\n+ _GLIBCXX_USE_NOEXCEPT __attribute__((__externally_visible__, __alloc_size__ (1), __alloc_align__ (2), __malloc__));\n void operator delete[](void*, std::align_val_t) _GLIBCXX_TXN_SAFE\n _GLIBCXX_USE_NOEXCEPT __attribute__((__externally_visible__));\n void operator delete[](void*, std::align_val_t, const std::nothrow_t&)\ndiff --git a/libstdc++-v3/testsuite/18_support/new_aligned_warn.cc b/libstdc++-v3/testsuite/18_support/new_aligned_warn.cc\nnew file mode 100644\nindex 000000000000..e9d374abe317\n--- /dev/null\n+++ b/libstdc++-v3/testsuite/18_support/new_aligned_warn.cc\n@@ -0,0 +1,13 @@\n+// { dg-options \"-Wattributes\" }\n+// { dg-do compile { target c++17 } }\n+\n+#include <new>\n+\n+int main()\n+{\n+ // PR c++/86878 has a patch to make these warn.\n+ (void) operator new(1, std::align_val_t(3)); // { dg-warning \"power of two\" \"\" { xfail *-*-* } }\n+ (void) operator new[](1, std::align_val_t(10)); // { dg-warning \"power of two\" \"\" { xfail *-*-* } }\n+ (void) operator new(1, std::align_val_t(0), std::nothrow_t()); // { dg-warning \"power of two\" \"\" { xfail *-*-* } }\n+ (void) operator new[](1, std::align_val_t(-1), std::nothrow_t()); // { dg-warning \"power of two\" \"\" { xfail *-*-* } }\n+}\n", "prefixes": [ "v1", "1/1" ] }