From nobody Sun Sep 28 15:58:41 2025 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1758891296518441.6541240630761; Fri, 26 Sep 2025 05:54:56 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1v27wS-0007WD-BI; Fri, 26 Sep 2025 08:52:53 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1v27w1-0006ET-4I; Fri, 26 Sep 2025 08:52:25 -0400 Received: from isrv.corpit.ru ([212.248.84.144]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1v27vo-0007qI-Lm; Fri, 26 Sep 2025 08:52:22 -0400 Received: from tsrv.corpit.ru (tsrv.tls.msk.ru [192.168.177.2]) by isrv.corpit.ru (Postfix) with ESMTP id 6F77B157F6E; Fri, 26 Sep 2025 15:45:43 +0300 (MSK) Received: from think4mjt.tls.msk.ru (mjtthink.wg.tls.msk.ru [192.168.177.146]) by tsrv.corpit.ru (Postfix) with ESMTP id D4859290F2C; Fri, 26 Sep 2025 15:45:44 +0300 (MSK) From: Michael Tokarev To: qemu-devel@nongnu.org Cc: qemu-stable@nongnu.org, Richard Henderson , Michael Tokarev Subject: [Stable-10.0.5 38/38] tests/tcg/multiarch: Add tb-link test Date: Fri, 26 Sep 2025 15:45:38 +0300 Message-ID: <20250926124540.2221746-38-mjt@tls.msk.ru> X-Mailer: git-send-email 2.47.3 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=212.248.84.144; envelope-from=mjt@tls.msk.ru; helo=isrv.corpit.ru X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZM-MESSAGEID: 1758891298429116600 Content-Type: text/plain; charset="utf-8" From: Richard Henderson Signed-off-by: Richard Henderson (cherry picked from commit e13e1195db8af18e149065a59351ea85215645bb) Signed-off-by: Michael Tokarev diff --git a/tests/tcg/multiarch/Makefile.target b/tests/tcg/multiarch/Make= file.target index 45c9cfe18c..cfecf65c2d 100644 --- a/tests/tcg/multiarch/Makefile.target +++ b/tests/tcg/multiarch/Makefile.target @@ -45,6 +45,8 @@ vma-pthread: LDFLAGS+=3D-pthread sigreturn-sigmask: CFLAGS+=3D-pthread sigreturn-sigmask: LDFLAGS+=3D-pthread =20 +tb-link: LDFLAGS+=3D-lpthread + # GCC versions 12/13/14/15 at least incorrectly complain about # "'SHA1Transform' reading 64 bytes from a region of size 0"; see the gcc = bug # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D106709 diff --git a/tests/tcg/multiarch/tb-link.c b/tests/tcg/multiarch/tb-link.c new file mode 100644 index 0000000000..4e40306fa1 --- /dev/null +++ b/tests/tcg/multiarch/tb-link.c @@ -0,0 +1,67 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * Verify that a single TB spin-loop is properly invalidated, + * releasing the thread from the spin-loop. + */ + +#include +#include +#include +#include +#include +#include +#include + + +#ifdef __x86_64__ +#define READY 0x000047c6 /* movb $0,0(%rdi) */ +#define LOOP 0xfceb9090 /* 1: nop*2; jmp 1b */ +#define RETURN 0x909090c3 /* ret; nop*3 */ +#define NOP 0x90909090 /* nop*4 */ +#elif defined(__aarch64__) +#define READY 0x3900001f /* strb wzr,[x0] */ +#define LOOP 0x14000000 /* b . */ +#define RETURN 0xd65f03c0 /* ret */ +#define NOP 0xd503201f /* nop */ +#elif defined(__riscv) +#define READY 0x00050023 /* sb zero, (a0) */ +#define LOOP 0x0000006f /* jal zero, #0 */ +#define RETURN 0x00008067 /* jalr zero, ra, 0 */ +#define NOP 0x00000013 /* nop */ +#endif + + +int main() +{ +#ifdef READY + int tmp; + pthread_t thread_id; + bool hold =3D true; + uint32_t *buf; + + buf =3D mmap(NULL, 3 * sizeof(uint32_t), + PROT_READ | PROT_WRITE | PROT_EXEC, + MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); + assert(buf !=3D MAP_FAILED); + + buf[0] =3D READY; + buf[1] =3D LOOP; + buf[2] =3D RETURN; + + alarm(2); + + tmp =3D pthread_create(&thread_id, NULL, (void *(*)(void *))buf, &hold= ); + assert(tmp =3D=3D 0); + + while (hold) { + sched_yield(); + } + + buf[1] =3D NOP; + __builtin___clear_cache(&buf[1], &buf[2]); + + tmp =3D pthread_join(thread_id, NULL); + assert(tmp =3D=3D 0); +#endif + return 0; +} --=20 2.47.3