From patchwork Tue Mar 5 12:09:42 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Alex_Benn=C3=A9e?= X-Patchwork-Id: 777996 Delivered-To: patch@linaro.org Received: by 2002:a5d:48c8:0:b0:33e:474f:8c56 with SMTP id p8csp399773wrs; Tue, 5 Mar 2024 04:18:33 -0800 (PST) X-Forwarded-Encrypted: i=2; AJvYcCU0EKujW9qO0U35+ucHrbCbzyfCA2YOqN28QNHlh0gXmW3MfnQznLtaC9Hu56lLN+9WEFJndNtX9A5542ObOTny X-Google-Smtp-Source: AGHT+IE87zwzSsMDJZvgZbxtgKhZlsfktmCwNQu8TuWB74c1Lsk5gmQTZKGAw2eBBzatRh5Jd+kk X-Received: by 2002:a0c:f0d3:0:b0:690:82b2:5fcf with SMTP id d19-20020a0cf0d3000000b0069082b25fcfmr1592678qvl.37.1709641113428; Tue, 05 Mar 2024 04:18:33 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1709641113; cv=none; d=google.com; s=arc-20160816; b=nPzthYRYLQYHdOhXGDCIKHWJdwX0TURcYJhafEQCsdKcHbPkltYMQVvamKB6YL+pTA hud/A4ME3Jalst67IKMb6MYaCs2LM0+sK5h6Y+bJleaLImIFX1yc77IKDg7bjfx92dX/ Af03Y+clwPetWV0AEw/1whQS+NZA4MoBIw1rUOCKI2MWS5ckiszcB8zi9+elkM2iayc5 LPQ2mQGawfM+SbvN7yIttIHQGK9UvYA29Cba0fw4LtJkXI59Y5uMJcVNwKfub8Ozmv45 ccTWACHo5exa8HHv9+05BsF1W4ZfQNsRx7rt59l15Yj8BTHl0hQUHknMf8XdLGTASu85 d2jw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=sender:errors-to:list-subscribe:list-help:list-post:list-archive :list-unsubscribe:list-id:precedence:content-transfer-encoding :mime-version:references:in-reply-to:message-id:date:subject:cc:to :from:dkim-signature; bh=BXkKB6oKUyrrNS5PAFHEEy/nZhjQotVShPfjRJSJXXY=; fh=f6avZL29XgA8xpJjruaeiY/t2FUw83MgiNvVXs1rDYg=; b=NCFgAs2KVEtdCezvSi7wb6IjCwZWYnmiAcN6rddvbDU4Kd5KpkqOGqrK1PhJjcd4sZ gc6LnhkWMsix7CCArt7DS3bz3fonfOqR6RlSM1Sll6go5zgckUSKeVMgcKX3rswVzLBa 8cixU2m1An2YKOKi4+aAtKCX68MJDUulL7x2gyBkRLLZjwpJk4V39SslxHd3VrLikuYi Gy0FPZEkswdWVfqTBUU2vuAs+MIK+6Ljy5TkJGw3Jg78nRzBG8/HsNA28TRPpJ4uo4/5 oNEqwJsnoDwZq5TRqfLkKjFvlg/4+6va9jm0ITUmND50q7Z9DHPmfWxEA0BuwV4gGHWJ ifKg==; dara=google.com ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=Cd0XR8YC; spf=pass (google.com: domain of qemu-devel-bounces+patch=linaro.org@nongnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom="qemu-devel-bounces+patch=linaro.org@nongnu.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Return-Path: Received: from lists.gnu.org (lists.gnu.org. [209.51.188.17]) by mx.google.com with ESMTPS id if14-20020a0562141c4e00b0068f7f227a64si11809383qvb.488.2024.03.05.04.18.33 for (version=TLS1_2 cipher=ECDHE-ECDSA-CHACHA20-POLY1305 bits=256/256); Tue, 05 Mar 2024 04:18:33 -0800 (PST) Received-SPF: pass (google.com: domain of qemu-devel-bounces+patch=linaro.org@nongnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; Authentication-Results: mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=Cd0XR8YC; spf=pass (google.com: domain of qemu-devel-bounces+patch=linaro.org@nongnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom="qemu-devel-bounces+patch=linaro.org@nongnu.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1rhTdg-0002dB-JI; Tue, 05 Mar 2024 07:11:20 -0500 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 1rhTcq-0001bG-Ht for qemu-devel@nongnu.org; Tue, 05 Mar 2024 07:10:30 -0500 Received: from mail-wm1-x32a.google.com ([2a00:1450:4864:20::32a]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1rhTcc-0001P0-QA for qemu-devel@nongnu.org; Tue, 05 Mar 2024 07:10:28 -0500 Received: by mail-wm1-x32a.google.com with SMTP id 5b1f17b1804b1-412e6bdd454so12021035e9.1 for ; Tue, 05 Mar 2024 04:10:12 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1709640612; x=1710245412; darn=nongnu.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=BXkKB6oKUyrrNS5PAFHEEy/nZhjQotVShPfjRJSJXXY=; b=Cd0XR8YCyPXAwU7YhKdrMMPiB4LFjPYcIO/reS7phUVFI7RmFGi8QCr33diLWthxkP eDeTj6AYUBUeJB1f8P7ezCWi6VkRY1MwCeap3wybZek7jWCfbdVkK/udU8CiRFWxXDkq Yom+iQIxdyRLL4MQC0XXZoF4xzbQZX7CoIZffBCtK0JYS9715xO6zX3RE6WQKirvOqP+ bVLl4U+U0V2EyJOIE9d/y2SLC8kY0x+CV9Rgz3G1rTYIuYMrc+gQi0vDOsiUyL/NlWT5 wWlHc9z5SWfpCY+YRVghqokV77AvleMXMJS1UGvXMuXHBj+bQp4u1qDdqV9kky9tQtH9 OOSw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1709640612; x=1710245412; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=BXkKB6oKUyrrNS5PAFHEEy/nZhjQotVShPfjRJSJXXY=; b=qLSJ0TS2bKOOot4N6KblqN15zGXUp7ooPvXGd57vAT6uXB7TvNg3vOrKcEja/s8UaQ uaeEogT08I9/7PR4I8KA2mFuQMZhVOx4zg7ijNVsQbzVHfEgm0M57pQH0w4i51Os2lqY 2TOreiTw9MDrEebfw1IUYgOoDPMXq11qPfEXXKfg5z3m85y6LwoHD9wtBPj2z7bM3/Wn PJMDr0fU6dzFYBaaxMqlSh6zLvq68cUBpOjP30UijGEc/n003E/E2nyvO1JlMmKnhzcY 32HBnm7SlCLg09eoepJwpBB6BalClnfuZyvl3P5uhIZa13vxhaXuD2ThlBX5kI/IOCew T4gw== X-Gm-Message-State: AOJu0Yykts20vowHiLJAnnlWkRhBq1cuQx35t6T+lpwhUjnpp8oIYUYL rk0eaju+0R/V1ivntcvgDZDotgCTavf7fokRkLN4vX0WgkHUPThKO85mSGm/VCk= X-Received: by 2002:a05:600c:5249:b0:412:e59e:da2c with SMTP id fc9-20020a05600c524900b00412e59eda2cmr3295051wmb.37.1709640611931; Tue, 05 Mar 2024 04:10:11 -0800 (PST) Received: from draig.lan ([85.9.250.243]) by smtp.gmail.com with ESMTPSA id fa10-20020a05600c518a00b00412e17d5f83sm7151450wmb.14.2024.03.05.04.10.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 05 Mar 2024 04:10:08 -0800 (PST) Received: from draig.lan (localhost [IPv6:::1]) by draig.lan (Postfix) with ESMTP id 1A3755F958; Tue, 5 Mar 2024 12:10:06 +0000 (GMT) From: =?utf-8?q?Alex_Benn=C3=A9e?= To: qemu-devel@nongnu.org Cc: Wainer dos Santos Moschetta , Alistair Francis , Nicholas Piggin , Liu Zhiwei , Richard Henderson , Yanan Wang , qemu-s390x@nongnu.org, "Edgar E. Iglesias" , Eduardo Habkost , Daniel Henrique Barboza , Michael Rolnik , Daniel Henrique Barboza , =?utf-8?q?Alex_Benn=C3=A9e?= , Laurent Vivier , Yoshinori Sato , Laurent Vivier , Thomas Huth , Peter Maydell , Mahmoud Mandour , Brad Smith , Alistair Francis , Brian Cain , Cleber Rosa , John Snow , Marcel Apfelbaum , Pierrick Bouvier , Palmer Dabbelt , Riku Voipio , qemu-arm@nongnu.org, qemu-ppc@nongnu.org, Weiwei Li , Bin Meng , =?utf-8?q?C=C3=A9dric_Le_Goater?= , Beraldo Leal , Kyle Evans , David Hildenbrand , Song Gao , =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= , Paolo Bonzini , Alexandre Iooss , Warner Losh , qemu-riscv@nongnu.org, Ilya Leoshkevich Subject: [PATCH 06/29] {linux,bsd}-user: Pass pid to fork_end() Date: Tue, 5 Mar 2024 12:09:42 +0000 Message-Id: <20240305121005.3528075-7-alex.bennee@linaro.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240305121005.3528075-1-alex.bennee@linaro.org> References: <20240305121005.3528075-1-alex.bennee@linaro.org> MIME-Version: 1.0 Received-SPF: pass client-ip=2a00:1450:4864:20::32a; envelope-from=alex.bennee@linaro.org; helo=mail-wm1-x32a.google.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, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=unavailable 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+patch=linaro.org@nongnu.org Sender: qemu-devel-bounces+patch=linaro.org@nongnu.org From: Ilya Leoshkevich The upcoming follow-fork-mode child support requires knowing the child pid. Pass it down. Reviewed-by: Alex Bennée Reviewed-by: Richard Henderson Signed-off-by: Ilya Leoshkevich Message-Id: <20240219141628.246823-6-iii@linux.ibm.com> Signed-off-by: Alex Bennée --- bsd-user/freebsd/os-proc.h | 6 +++--- bsd-user/qemu.h | 2 +- linux-user/user-internals.h | 2 +- bsd-user/main.c | 4 +++- linux-user/main.c | 4 +++- linux-user/syscall.c | 6 +++--- 6 files changed, 14 insertions(+), 10 deletions(-) diff --git a/bsd-user/freebsd/os-proc.h b/bsd-user/freebsd/os-proc.h index d6418780344..3003c8cb637 100644 --- a/bsd-user/freebsd/os-proc.h +++ b/bsd-user/freebsd/os-proc.h @@ -208,7 +208,7 @@ static inline abi_long do_freebsd_fork(void *cpu_env) */ set_second_rval(cpu_env, child_flag); - fork_end(child_flag); + fork_end(ret); return ret; } @@ -252,7 +252,7 @@ static inline abi_long do_freebsd_rfork(void *cpu_env, abi_long flags) * value: 0 for parent process, 1 for child process. */ set_second_rval(cpu_env, child_flag); - fork_end(child_flag); + fork_end(ret); return ret; @@ -285,7 +285,7 @@ static inline abi_long do_freebsd_pdfork(void *cpu_env, abi_ulong target_fdp, * value: 0 for parent process, 1 for child process. */ set_second_rval(cpu_env, child_flag); - fork_end(child_flag); + fork_end(ret); return ret; } diff --git a/bsd-user/qemu.h b/bsd-user/qemu.h index 4adb75d19ff..1b0a591d2d2 100644 --- a/bsd-user/qemu.h +++ b/bsd-user/qemu.h @@ -192,7 +192,7 @@ void cpu_loop(CPUArchState *env); char *target_strerror(int err); int get_osversion(void); void fork_start(void); -void fork_end(int child); +void fork_end(pid_t pid); #include "qemu/log.h" diff --git a/linux-user/user-internals.h b/linux-user/user-internals.h index c63ef45fc78..ce11d9e21c1 100644 --- a/linux-user/user-internals.h +++ b/linux-user/user-internals.h @@ -71,7 +71,7 @@ const char *target_strerror(int err); int get_osversion(void); void init_qemu_uname_release(void); void fork_start(void); -void fork_end(int child); +void fork_end(pid_t pid); /** * probe_guest_base: diff --git a/bsd-user/main.c b/bsd-user/main.c index 517c6b3ec2f..fca9b302043 100644 --- a/bsd-user/main.c +++ b/bsd-user/main.c @@ -116,8 +116,10 @@ void fork_start(void) gdbserver_fork_start(); } -void fork_end(int child) +void fork_end(pid_t pid) { + bool child = pid == 0; + if (child) { CPUState *cpu, *next_cpu; /* diff --git a/linux-user/main.c b/linux-user/main.c index 755c566d6d2..cab95f5b0aa 100644 --- a/linux-user/main.c +++ b/linux-user/main.c @@ -148,8 +148,10 @@ void fork_start(void) gdbserver_fork_start(); } -void fork_end(int child) +void fork_end(pid_t pid) { + bool child = pid == 0; + qemu_plugin_user_postfork(child); mmap_fork_end(child); if (child) { diff --git a/linux-user/syscall.c b/linux-user/syscall.c index c233d4eb30a..7f30defcb13 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -6669,7 +6669,7 @@ static int do_fork(CPUArchState *env, unsigned int flags, abi_ulong newsp, if (ret == 0) { /* Child Process. */ cpu_clone_regs_child(env, newsp, flags); - fork_end(1); + fork_end(ret); /* There is a race condition here. The parent process could theoretically read the TID in the child process before the child tid is set. This would require using either ptrace @@ -6700,8 +6700,8 @@ static int do_fork(CPUArchState *env, unsigned int flags, abi_ulong newsp, } #endif put_user_u32(pid_fd, parent_tidptr); - } - fork_end(0); + } + fork_end(ret); } g_assert(!cpu_in_exclusive_context(cpu)); }