From nobody Sun May 19 12:01:00 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; 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; dmarc=pass(p=none dis=none) header.from=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1673963545; cv=none; d=zohomail.com; s=zohoarc; b=a1TCWaAxbjSa9OXADRhz2cGagjIbCeKPFKEAbJJhzEGVaQxi8vpHJkY3lM9kWXOjHnl4NF/VJsYeDZMDWN1IOFQKvIO+lnchpTligvoiIdZvmMgq3iC3eDal8/KxdwjnJHQsWOQkKZ6AJL+nSGuHyVf0zksd+dhchmKb2K/zXww= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1673963545; h=Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; bh=z1JWCQ/XZDP0YzmeBm+TMTnUrDS7/1OM63fu48KSkq8=; b=HtbdlyrIKtULGtDLtzoBSVvbQNHWny62KHYW5qETmr+iRLBHeBAGDfjWE/kypQugE+/D7525AnC1GNQPKkKUrFgq/UqzX2e0eeJQ3HUjOhQEkpcSPdoxMFEsUhI4skFA9+GjDFoLC28A9p+pFr0TnnfSN5OqGOeJT38S5XFPfBs= ARC-Authentication-Results: i=1; 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Tue, 17 Jan 2023 08:52:10 -0500 Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-302-Jk1u2vdfPeiKTSREOh5IQw-1; Tue, 17 Jan 2023 08:52:06 -0500 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.rdu2.redhat.com [10.11.54.3]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 54F771818E56; Tue, 17 Jan 2023 13:52:06 +0000 (UTC) Received: from virtlab701.virt.lab.eng.bos.redhat.com (virtlab701.virt.lab.eng.bos.redhat.com [10.19.152.228]) by smtp.corp.redhat.com (Postfix) with ESMTP id 0FFEB112131B; Tue, 17 Jan 2023 13:52:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1673963528; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=z1JWCQ/XZDP0YzmeBm+TMTnUrDS7/1OM63fu48KSkq8=; b=Au993I4woZfsUPawz2nvru/43hWDPMRHhTypkY7gD5fGgEy9K84CvmErIMNiMdizQiR65d WIR1zpyaJ8KzzqPowtYaX1SwVOkkEc/roqy6CZzH0iRRG7nymdHZDWkGdqtAj4KsYjxwQh msJFbjOHcoLWJ4COXauv/nQ8xhYpsHE= X-MC-Unique: Jk1u2vdfPeiKTSREOh5IQw-1 From: Emanuele Giuseppe Esposito To: qemu-devel@nongnu.org Cc: Warner Losh , Kyle Evans , Kevin Wolf , Stefan Hajnoczi , Paolo Bonzini , =?UTF-8?q?Alex=20Benn=C3=A9e?= , Thomas Huth , Richard Henderson , Emanuele Giuseppe Esposito Subject: [PATCH 1/3] util/qemu-thread-posix: use TSA_NO_TSA to suppress clang TSA warnings Date: Tue, 17 Jan 2023 08:52:01 -0500 Message-Id: <20230117135203.3049709-2-eesposit@redhat.com> In-Reply-To: <20230117135203.3049709-1-eesposit@redhat.com> References: <20230117135203.3049709-1-eesposit@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.1 on 10.11.54.3 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=170.10.133.124; envelope-from=eesposit@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-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-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1673963546652100002 Content-Type: text/plain; charset="utf-8" QEMU does not compile when enabling clang's thread safety analysis (TSA), because some functions create wrappers for pthread mutexes but do not use any TSA macro. Therefore the compiler fails. In order to make the compiler happy and avoid adding all the necessary macros to all callers (lock functions should use TSA_ACQUIRE, while unlock TSA_RELEASE, and this applies to all users of pthread_mutex_lock/pthread_mutex_unlock), simply use TSA_NO_TSA to supppress such warnings. Signed-off-by: Emanuele Giuseppe Esposito --- include/qemu/thread.h | 14 +++++++++----- util/qemu-thread-posix.c | 2 +- 2 files changed, 10 insertions(+), 6 deletions(-) diff --git a/include/qemu/thread.h b/include/qemu/thread.h index 7c6703bce3..81ec9fc144 100644 --- a/include/qemu/thread.h +++ b/include/qemu/thread.h @@ -3,6 +3,7 @@ =20 #include "qemu/processor.h" #include "qemu/atomic.h" +#include "qemu/clang-tsa.h" =20 typedef struct QemuCond QemuCond; typedef struct QemuSemaphore QemuSemaphore; @@ -24,9 +25,12 @@ typedef struct QemuThread QemuThread; =20 void qemu_mutex_init(QemuMutex *mutex); void qemu_mutex_destroy(QemuMutex *mutex); -int qemu_mutex_trylock_impl(QemuMutex *mutex, const char *file, const int = line); -void qemu_mutex_lock_impl(QemuMutex *mutex, const char *file, const int li= ne); -void qemu_mutex_unlock_impl(QemuMutex *mutex, const char *file, const int = line); +int TSA_NO_TSA qemu_mutex_trylock_impl(QemuMutex *mutex, const char *file, + const int line); +void TSA_NO_TSA qemu_mutex_lock_impl(QemuMutex *mutex, const char *file, + const int line); +void TSA_NO_TSA qemu_mutex_unlock_impl(QemuMutex *mutex, const char *file, + const int line); =20 void qemu_rec_mutex_init(QemuRecMutex *mutex); void qemu_rec_mutex_destroy(QemuRecMutex *mutex); @@ -153,8 +157,8 @@ void qemu_cond_destroy(QemuCond *cond); */ void qemu_cond_signal(QemuCond *cond); void qemu_cond_broadcast(QemuCond *cond); -void qemu_cond_wait_impl(QemuCond *cond, QemuMutex *mutex, - const char *file, const int line); +void TSA_NO_TSA qemu_cond_wait_impl(QemuCond *cond, QemuMutex *mutex, + const char *file, const int line); bool qemu_cond_timedwait_impl(QemuCond *cond, QemuMutex *mutex, int ms, const char *file, const int line); =20 diff --git a/util/qemu-thread-posix.c b/util/qemu-thread-posix.c index bae938c670..2dd1069cd3 100644 --- a/util/qemu-thread-posix.c +++ b/util/qemu-thread-posix.c @@ -223,7 +223,7 @@ void qemu_cond_wait_impl(QemuCond *cond, QemuMutex *mut= ex, const char *file, con error_exit(err, __func__); } =20 -static bool +static bool TSA_NO_TSA qemu_cond_timedwait_ts(QemuCond *cond, QemuMutex *mutex, struct timespec *= ts, const char *file, const int line) { --=20 2.39.0 From nobody Sun May 19 12:01:00 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; 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bh=/UurGh1jCzdqSeHri8S80knH++KQLQoCmKjvTof5uS8=; b=ABy/28Tzwjk+RCqDzqIb61Z1Aqq+uXjefcrLjtKgcs3+byN7i02loYfw6hnOuji8e5tsTN RmE+QAvFvBhk8JkoCz263sw/hTFQjyea+vEQlcuTjGx4f9ixLnoP8YWjmSRYfsLN7hIVXB r7qw85ewU+pxrckF1dSCj/ClRcQtOZQ= X-MC-Unique: 3A2HjNXKMI-1NS5zBAZ6NA-1 From: Emanuele Giuseppe Esposito To: qemu-devel@nongnu.org Cc: Warner Losh , Kyle Evans , Kevin Wolf , Stefan Hajnoczi , Paolo Bonzini , =?UTF-8?q?Alex=20Benn=C3=A9e?= , Thomas Huth , Richard Henderson , Emanuele Giuseppe Esposito Subject: [PATCH 2/3] bsd-user/mmap: use TSA_NO_TSA to suppress clang TSA warnings Date: Tue, 17 Jan 2023 08:52:02 -0500 Message-Id: <20230117135203.3049709-3-eesposit@redhat.com> In-Reply-To: <20230117135203.3049709-1-eesposit@redhat.com> References: <20230117135203.3049709-1-eesposit@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.1 on 10.11.54.3 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=170.10.133.124; envelope-from=eesposit@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-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-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1673972412372100003 Content-Type: text/plain; charset="utf-8" QEMU does not compile when enabling clang's thread safety analysis (TSA), because some functions create wrappers for pthread mutexes but do not use any TSA macro. Therefore the compiler fails. In order to make the compiler happy and avoid adding all the necessary macros to all callers (lock functions should use TSA_ACQUIRE, while unlock TSA_RELEASE, and this applies to allusers of pthr= ead_mutex_lock/pthread_mutex_unlock), simply use TSA_NO_TSA to supppress such warnings. Signed-off-by: Emanuele Giuseppe Esposito Reviewed-by: Warner Losh --- bsd-user/qemu.h | 5 +++-- include/exec/exec-all.h | 5 +++-- 2 files changed, 6 insertions(+), 4 deletions(-) diff --git a/bsd-user/qemu.h b/bsd-user/qemu.h index be6105385e..711fdd1b64 100644 --- a/bsd-user/qemu.h +++ b/bsd-user/qemu.h @@ -37,6 +37,7 @@ extern char **environ; #include "target_os_signal.h" #include "target.h" #include "exec/gdbstub.h" +#include "qemu/clang-tsa.h" =20 /* * This struct is used to hold certain information about the image. Basic= ally, @@ -235,8 +236,8 @@ int target_msync(abi_ulong start, abi_ulong len, int fl= ags); extern unsigned long last_brk; extern abi_ulong mmap_next_start; abi_ulong mmap_find_vma(abi_ulong start, abi_ulong size); -void mmap_fork_start(void); -void mmap_fork_end(int child); +void TSA_NO_TSA mmap_fork_start(void); +void TSA_NO_TSA mmap_fork_end(int child); =20 /* main.c */ extern char qemu_proc_pathname[]; diff --git a/include/exec/exec-all.h b/include/exec/exec-all.h index 25e11b0a8d..4f0c0559ac 100644 --- a/include/exec/exec-all.h +++ b/include/exec/exec-all.h @@ -25,6 +25,7 @@ #include "exec/cpu_ldst.h" #endif #include "qemu/interval-tree.h" +#include "qemu/clang-tsa.h" =20 /* allow to see translation results - the slowdown should be negligible, s= o we leave it */ #define DEBUG_DISAS @@ -758,8 +759,8 @@ static inline tb_page_addr_t get_page_addr_code(CPUArch= State *env, } =20 #if defined(CONFIG_USER_ONLY) -void mmap_lock(void); -void mmap_unlock(void); +void TSA_NO_TSA mmap_lock(void); +void TSA_NO_TSA mmap_unlock(void); bool have_mmap_lock(void); =20 /** --=20 2.39.0 From nobody Sun May 19 12:01:00 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; 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; dmarc=pass(p=none dis=none) header.from=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1673972409; cv=none; d=zohomail.com; s=zohoarc; b=kmgRmOy2rw+r0NkspJ2AREF5yemEMFKm/JpbTd4iWU8gk5r1J3qoaTcxP9QLdlGZ1J6/yn1++4RYn1OcbVcGsVxo3sGmSYQStSc3i3LFQrmDmBWKK+aYuisVgF7pZP9wSCw2bcC3cJgVoSQ/F+4bVgzpcCmdUyV+vj/tralRO6c= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1673972409; h=Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; bh=9b/HZg6T/t0VaQsEaCQvjm94fUbvfIv/bnKtuTyl96U=; b=hXK8hW0MGYsswr4F36ThDXSBiHEWVaG/CC3m0FHLy3uJsrGDZyY+JVJZcfy1I1lLDEl+9Pp0G4GxrSe2ZaB/QryNiEAW+Ely/ZyPmHkxz/dUNKcNht+aF/m9FYNvkxTJ2TkuubWVHkDVwh7YdWEqFpTSI+8fCv5CV+GjOJYc9qs= ARC-Authentication-Results: i=1; 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bh=9b/HZg6T/t0VaQsEaCQvjm94fUbvfIv/bnKtuTyl96U=; b=GcvuYcZOBFZgLdJKRHCb6wkB1+c38aB/Af5W0nMh34kWN9kI6lmSfNylw0v7PsgJN7u0MR /xXVOJmHgeImtdh1b1ye0DUtl1ULTpFAErGaMZ+kct+b+Czp5B6vqJXJFavNrtTxs7X+rW B0QQdky9EuPsxqvEAdWDoKfwXBUm40Q= X-MC-Unique: cgaCN0pAO1yobr8_QLBqWg-1 From: Emanuele Giuseppe Esposito To: qemu-devel@nongnu.org Cc: Warner Losh , Kyle Evans , Kevin Wolf , Stefan Hajnoczi , Paolo Bonzini , =?UTF-8?q?Alex=20Benn=C3=A9e?= , Thomas Huth , Richard Henderson , Emanuele Giuseppe Esposito Subject: [PATCH 3/3] configure: Enable -Wthread-safety if present Date: Tue, 17 Jan 2023 08:52:03 -0500 Message-Id: <20230117135203.3049709-4-eesposit@redhat.com> In-Reply-To: <20230117135203.3049709-1-eesposit@redhat.com> References: <20230117135203.3049709-1-eesposit@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.1 on 10.11.54.3 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=170.10.129.124; envelope-from=eesposit@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H2=-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-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1673972410381100001 Content-Type: text/plain; charset="utf-8" From: Kevin Wolf This enables clang's thread safety analysis (TSA), which we'll use to statically check the block graph locking. Signed-off-by: Kevin Wolf Message-Id: <20221207131838.239125-9-kwolf@redhat.com> Reviewed-by: Emanuele Giuseppe Esposito Signed-off-by: Kevin Wolf --- configure | 1 + 1 file changed, 1 insertion(+) diff --git a/configure b/configure index 2281892657..14668e6269 100755 --- a/configure +++ b/configure @@ -1183,6 +1183,7 @@ add_to warn_flags -Wnested-externs add_to warn_flags -Wendif-labels add_to warn_flags -Wexpansion-to-defined add_to warn_flags -Wimplicit-fallthrough=3D2 +add_to warn_flags -Wthread-safety =20 nowarn_flags=3D add_to nowarn_flags -Wno-initializer-overrides --=20 2.39.0