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[50.253.99.174]) by smtp.gmail.com with ESMTPSA id j2sm1972989ilu.82.2022.01.31.11.57.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 31 Jan 2022 11:57:04 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bsdimp-com.20210112.gappssmtp.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=yFznSEKSLa4wr4LT6m629JqoMGJyil+XeLDgIrumdQM=; b=UbOVK6+q8y5HMod4jvFX0eXD83YN1oQA8rQdJMXfc1bhcdEFb8/WrNZmZdgy6txIW9 BxcAg8ufgc3J+V6zVpa77xl6LVPVFLkO7rKi3Sird2sdH5aVDhXgPcefAorQO3AR0DiE 6h2TZqmtTd05X1J/64a94pxJBOsbK/bqJG+WUWMAeJrwiXbQ9xc2ed/6ioPmhnWP/t8R 5EZDaNIieKxs12p3iVvcsbwym7DH1Nbd2R6CMAKeZxOFirDNDJvcIWbaeaSyZyEWfIS8 VK83I3oHlBQ+6YKiuPwhzKlWF1aTOKDFiVPid8Yl4/8d8DTkMtajBoztoaA/xP592yki mVWw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=yFznSEKSLa4wr4LT6m629JqoMGJyil+XeLDgIrumdQM=; b=7LENEb1e43Pycba9FufACJLtrp7nGYdoewHmgtqciUa5VKcUsCFpMLT02THsZWcKrS Re5Zouv6lWltKofdO/dccL5AFwwklBheL6WhK/Mm+hXoIqGs70Pa6y8dY6RA0BYk4gC9 0S+PJV8/hBio4kWUQKeus69TioV5LOEFFZDTli5Daf2rSZ9FAGOVcVYxsd9kamAtEeYS RfOL3KIgd4fS3dHJZFb/rCyOMbEgU7CFIJVDE+xgfvm1TcCgEzNt/RHwV+dYFqVba7Zx RIuIm4uO2elnhcx6vQDFw3iusEC8/a+mjjnR+S/JYXch4xiiHxr2qgoW/rq31PWO6E0g UN9w== X-Gm-Message-State: AOAM53247IWZjw4zk0WhSiqEx74/ps8PpRFLySXcExGiS1iO2gEM6Ipn rNlZ5Fk1qyuAHRMtK5sh6HXyX8ezaJm79g== X-Google-Smtp-Source: ABdhPJw+lO5ryTJS5ySw4nqeeI2EW0ziKWe5q6gu1atKWc2bLrz41WXyBfRdeVafUXTHAXKFIySjOw== X-Received: by 2002:a02:a602:: with SMTP id c2mr4602171jam.220.1643659024973; Mon, 31 Jan 2022 11:57:04 -0800 (PST) From: Warner Losh To: qemu-devel@nongnu.org Subject: [PULL 34/40] bsd-user/signal.c: process_pending_signals Date: Mon, 31 Jan 2022 12:56:30 -0700 Message-Id: <20220131195636.31991-35-imp@bsdimp.com> X-Mailer: git-send-email 2.33.1 In-Reply-To: <20220131195636.31991-1-imp@bsdimp.com> References: <20220131195636.31991-1-imp@bsdimp.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Host-Lookup-Failed: Reverse DNS lookup failed for 2607:f8b0:4864:20::d34 (failed) 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: none client-ip=2607:f8b0:4864:20::d34; envelope-from=imp@bsdimp.com; helo=mail-io1-xd34.google.com X-Spam_score_int: -10 X-Spam_score: -1.1 X-Spam_bar: - X-Spam_report: (-1.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, PDS_HP_HELO_NORDNS=0.001, RCVD_IN_DNSWL_NONE=-0.0001, RDNS_NONE=0.793, SPF_HELO_NONE=0.001, SPF_NONE=0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=no 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: , Cc: Peter Maydell , Stacey Son , Kyle Evans , Richard Henderson , def@FreeBSD.org, jrtc27@FreeBSD.org, Warner Losh Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZM-MESSAGEID: 1643662327277100001 Content-Type: text/plain; charset="utf-8" Process the currently queued signals. Signed-off-by: Stacey Son Signed-off-by: Kyle Evans Signed-off-by: Warner Losh Reviewed-by: Richard Henderson --- bsd-user/signal.c | 56 ++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 55 insertions(+), 1 deletion(-) diff --git a/bsd-user/signal.c b/bsd-user/signal.c index 34e8c811ad6..4b398745f45 100644 --- a/bsd-user/signal.c +++ b/bsd-user/signal.c @@ -756,8 +756,62 @@ static void handle_pending_signal(CPUArchState *env, i= nt sig, } } =20 -void process_pending_signals(CPUArchState *cpu_env) +void process_pending_signals(CPUArchState *env) { + CPUState *cpu =3D env_cpu(env); + int sig; + sigset_t *blocked_set, set; + struct emulated_sigtable *k; + TaskState *ts =3D cpu->opaque; + + while (qatomic_read(&ts->signal_pending)) { + sigfillset(&set); + sigprocmask(SIG_SETMASK, &set, 0); + + restart_scan: + sig =3D ts->sync_signal.pending; + if (sig) { + /* + * Synchronous signals are forced by the emulated CPU in some = way. + * If they are set to ignore, restore the default handler (see + * sys/kern_sig.c trapsignal() and execsigs() for this behavio= r) + * though maybe this is done only when forcing exit for non SI= GCHLD. + */ + if (sigismember(&ts->signal_mask, target_to_host_signal(sig)) = || + sigact_table[sig - 1]._sa_handler =3D=3D TARGET_SIG_IGN) { + sigdelset(&ts->signal_mask, target_to_host_signal(sig)); + sigact_table[sig - 1]._sa_handler =3D TARGET_SIG_DFL; + } + handle_pending_signal(env, sig, &ts->sync_signal); + } + + k =3D ts->sigtab; + for (sig =3D 1; sig <=3D TARGET_NSIG; sig++, k++) { + blocked_set =3D ts->in_sigsuspend ? + &ts->sigsuspend_mask : &ts->signal_mask; + if (k->pending && + !sigismember(blocked_set, target_to_host_signal(sig))) { + handle_pending_signal(env, sig, k); + /* + * Restart scan from the beginning, as handle_pending_sign= al + * might have resulted in a new synchronous signal (eg SIG= SEGV). + */ + goto restart_scan; + } + } + + /* + * Unblock signals and check one more time. Unblocking signals may= cause + * us to take another host signal, which will set signal_pending a= gain. + */ + qatomic_set(&ts->signal_pending, 0); + ts->in_sigsuspend =3D false; + set =3D ts->signal_mask; + sigdelset(&set, SIGSEGV); + sigdelset(&set, SIGBUS); + sigprocmask(SIG_SETMASK, &set, 0); + } + ts->in_sigsuspend =3D false; } =20 void cpu_loop_exit_sigsegv(CPUState *cpu, target_ulong addr, --=20 2.33.1