From patchwork Fri Mar 1 23:05:27 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Richard Henderson X-Patchwork-Id: 777109 Delivered-To: patch@linaro.org Received: by 2002:adf:e94d:0:b0:33d:f458:43ce with SMTP id m13csp1603733wrn; Fri, 1 Mar 2024 15:16:31 -0800 (PST) X-Forwarded-Encrypted: i=2; AJvYcCWCU2sZKPEIC1e8dQPOmt3i82rUK982DwraA09W1p814lqYG/BVIdDThGUHiNzHBN3iwof/aJFUyL7GZvTOZVyI X-Google-Smtp-Source: AGHT+IGVb6Nf1/TM9YaO/OgefE/I03u9zPSnAE/tfspaaI0+uvhIZrNsBmLkNJFSee0E6VUySsDg X-Received: by 2002:a05:620a:4090:b0:787:91fc:f940 with SMTP id f16-20020a05620a409000b0078791fcf940mr4050347qko.48.1709334991084; Fri, 01 Mar 2024 15:16:31 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1709334991; cv=none; d=google.com; s=arc-20160816; b=nTIWgsU0Gx50yr3HQAdP2vRmBLSOoobrZN3Dk4YP/eZUofnu3fVDh17PjGOhqVYB8w 8U68OkgNfp2RKKXvQ1yOMGPr+WGpjffaju+kYPMBTRCvaIEWhFaf1T0y4KqB3om8j7Tu DjybruHKqFaySEIsqHj69EbzY+WqTBGssaT+qqOXspCq98nENmi6jlxF/7PuPb+FU3Lu VKim/aKQbaOm2ZzHMIEYCeyYVFN0PB62B42mYXFCulF8TPX6dJfIFazl/iF3rr1yNq3y KKJ+JjoHhK0SmUYJ+Onm0W1V0o7mIvKhP+nDIdG1S/930m5fs4j11xL7wXM1yREqz2m+ uMAw== 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=jFfW1DmYHFMf19W3HAUQWeg/5lBH99MdAkdqkDNLv3I=; fh=eu2DY09p+eeddYDiV+DalJS3Vr0kxK5BujclYkgWvDw=; b=LtPN2qV3Dv3WE7NTok+J1S1doBKWNdc5lB0AAUpqsVT368ypsaVvVlsXjKq/attAMm VWA4/goNQr5vSlcVhSru1bXfEgXKAhz+q+U0Q6V/FstN9Q7G6dvpvE25Q7rtVLgzNcki GRTUKjYaDRyU4L3mwjFVicd5FwyxTF87w0cTvZ0kEy0nZ01KJcesMOyd1vBAT45fEoB8 ps6gwSY6CzxpSk/xKRZOreKdwraKwDKAbO6oHMdlhuYj0R6PYX3bLGPt9K5G8vxJLEof ONeN//PSBcXGYR86ydkZMdvtmgvNy9mfnyCj47buEPaz1cdZMGM3Ia8bh4UwnAZSsRxd FnOA==; dara=google.com ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=QaWCJ4tq; 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 i13-20020a05620a0a0d00b00787c5bfbe6esi4588681qka.343.2024.03.01.15.16.30 for (version=TLS1_2 cipher=ECDHE-ECDSA-CHACHA20-POLY1305 bits=256/256); Fri, 01 Mar 2024 15:16:31 -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=QaWCJ4tq; 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 1rgBxn-0004uC-KK; Fri, 01 Mar 2024 18:06:47 -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 1rgBxd-0004rt-UN for qemu-devel@nongnu.org; Fri, 01 Mar 2024 18:06:42 -0500 Received: from mail-pl1-x62d.google.com ([2607:f8b0:4864:20::62d]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1rgBxa-0004DV-Ry for qemu-devel@nongnu.org; Fri, 01 Mar 2024 18:06:37 -0500 Received: by mail-pl1-x62d.google.com with SMTP id d9443c01a7336-1dc5d0162bcso25434825ad.0 for ; Fri, 01 Mar 2024 15:06:34 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1709334392; x=1709939192; 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=jFfW1DmYHFMf19W3HAUQWeg/5lBH99MdAkdqkDNLv3I=; b=QaWCJ4tqxnwojuuu2XZbWDjRPNE8LZs9erbE1yxXt7g7r0TfMZzcLMQhmP9POdh016 mFKHwA0KCx99uPZOTlE8HJ8sDxuHXj4a2tB/nSyIlzMjktTmBYwBnKu55IOIMq9266g7 YYrNwqVEPcU5n7SRGCRx2N+3lTUCh++USkL9AHoNPpXUIvsWCiI6HCRKdvN9VA8CWfvO srS96wOEIqhdFlGR2OYPUcOvp5w4E5h5y46TN4JpzNYf23fIHIlEFsTPDR41Vt9GV0mD d3VzmFGasZ5TWwOJXa/yVorbTPhTaxwHfJGnAMlZ6SG0MMxCKyJGFG001S2YWOuHu23u 9Naw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1709334392; x=1709939192; 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=jFfW1DmYHFMf19W3HAUQWeg/5lBH99MdAkdqkDNLv3I=; b=WCzUx9hLNB5ohBrv1Yv47cdWaqJbGYZZ6GIOPNKJTq4Kk24dcwU42AyULrcbDGM4kr Kvvybk/EXe+sH9NGsIg1YZzTb6d0EoZmo7rwf5nHKxBUjGoN7EedHLp0K6dKNIgYR3Ng DUSEw5RZdy7gttOJJXgzgqI24GZVvXQ/BGTGD7MV58kvJoIA2Q6Xr8Wyb6mRTCXOOw9R 8lvAm5FkP0+ZN9atg1dFvlMMOcrQi8yzg/lGwAvsiqmivmztOXgyfocE8X+CHjSXPtSU /KQA7d3Cofc09HGb7wGIk1eMHRvvAWnWJefRrP70hkljHHQu41NdI7h4EJi7+YB4qBTw S8jQ== X-Gm-Message-State: AOJu0Yy2PlRsyHjsP+u3NdbzIyfKcJ50S0oqQOt5KrBWPvVz4z6jLEEH sGVeSrk33Ha6W9Qtxl3bdv+cjDDoyQWttcmG8L78acXoZdgAn04RMhbj6eR/BK7XY1GfkjO2wq8 S X-Received: by 2002:a17:903:41ca:b0:1db:d66e:cd15 with SMTP id u10-20020a17090341ca00b001dbd66ecd15mr4038015ple.59.1709334392669; Fri, 01 Mar 2024 15:06:32 -0800 (PST) Received: from stoup.. (098-147-055-211.res.spectrum.com. [98.147.55.211]) by smtp.gmail.com with ESMTPSA id lc11-20020a170902fa8b00b001dc668e145asm3988580plb.200.2024.03.01.15.06.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 01 Mar 2024 15:06:32 -0800 (PST) From: Richard Henderson To: qemu-devel@nongnu.org Cc: =?utf-8?q?Alex_Benn=C3=A9e?= Subject: [PATCH 08/60] linux-user/elfload: Lock cpu list and mmap during elf_core_dump Date: Fri, 1 Mar 2024 13:05:27 -1000 Message-Id: <20240301230619.661008-9-richard.henderson@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240301230619.661008-1-richard.henderson@linaro.org> References: <20240301230619.661008-1-richard.henderson@linaro.org> MIME-Version: 1.0 Received-SPF: pass client-ip=2607:f8b0:4864:20::62d; envelope-from=richard.henderson@linaro.org; helo=mail-pl1-x62d.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=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+patch=linaro.org@nongnu.org Sender: qemu-devel-bounces+patch=linaro.org@nongnu.org Do not allow changes to the set of cpus and memory regions while we are dumping core. Reviewed-by: Alex Bennée Signed-off-by: Richard Henderson --- linux-user/elfload.c | 15 +++++++++------ 1 file changed, 9 insertions(+), 6 deletions(-) diff --git a/linux-user/elfload.c b/linux-user/elfload.c index 16dd08a828..6f9da721d7 100644 --- a/linux-user/elfload.c +++ b/linux-user/elfload.c @@ -4537,13 +4537,11 @@ static void fill_note_info(struct elf_note_info *info, } /* read and fill status of all threads */ - WITH_QEMU_LOCK_GUARD(&qemu_cpu_list_lock) { - CPU_FOREACH(cpu) { - if (cpu == thread_cpu) { - continue; - } - fill_thread_info(info, cpu_env(cpu)); + CPU_FOREACH(cpu) { + if (cpu == thread_cpu) { + continue; } + fill_thread_info(info, cpu_env(cpu)); } } @@ -4643,6 +4641,9 @@ static int elf_core_dump(int signr, const CPUArchState *env) return 0; } + cpu_list_lock(); + mmap_lock(); + /* * Walk through target process memory mappings and * set up structure containing this information. After @@ -4760,6 +4761,8 @@ static int elf_core_dump(int signr, const CPUArchState *env) out: ret = -errno; + mmap_unlock(); + cpu_list_unlock(); free_note_info(&info); vma_delete(&mm); close(fd);