From nobody Thu Nov 6 14:40:07 2025 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; dkim=fail; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1541502796337409.62239297514293; Tue, 6 Nov 2018 03:13:16 -0800 (PST) Received: from localhost ([::1]:40331 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gJzIJ-0005RJ-78 for importer@patchew.org; Tue, 06 Nov 2018 06:13:15 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:48880) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gJzBf-0006KP-8t for qemu-devel@nongnu.org; Tue, 06 Nov 2018 06:06:28 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gJzBb-0000ty-3E for qemu-devel@nongnu.org; Tue, 06 Nov 2018 06:06:22 -0500 Received: from greensocs.com ([193.104.36.180]:46669) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gJzBT-0000nc-HU; Tue, 06 Nov 2018 06:06:11 -0500 Received: from localhost (localhost [127.0.0.1]) by greensocs.com (Postfix) with ESMTP id 211285C9D97; Tue, 6 Nov 2018 12:06:10 +0100 (CET) Received: from greensocs.com ([127.0.0.1]) by localhost (gs-01.greensocs.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id uepO-CrC8a7W; Tue, 6 Nov 2018 12:06:09 +0100 (CET) Received: by greensocs.com (Postfix, from userid 998) id 0E14B5C026D; Tue, 6 Nov 2018 12:06:06 +0100 (CET) Received: from michell-laptop.home.lmichel.fr (lfbn-1-8165-82.w90-112.abo.wanadoo.fr [90.112.74.82]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: luc.michel@greensocs.com) by greensocs.com (Postfix) with ESMTPSA id 7F5865C024B; Tue, 6 Nov 2018 12:06:06 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=greensocs.com; s=mail; t=1541502370; bh=oIF9dYQDZUKcoiOrfIYnR2/JYabFthPUu6QvgXLquD8=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=4Xs8AEmDU36rnytlEQksBVVV8PnxuSdNciNZipjhYTGTJw9FEmpyQiO6MDgeEO+/2 fA34fSpc091XEGLaqnnN70py01lTB/v5GaWRtWfa9wANmolJ7qFcyPwFQyfS/PZBXy HVGVZJl6SYjfRFZQC0LzL9PMXwto2Sm+iWLsTK34= X-Virus-Scanned: amavisd-new at greensocs.com Authentication-Results: gs-01.greensocs.com (amavisd-new); dkim=pass (1024-bit key) header.d=greensocs.com header.b=wHQVAkf6; dkim=pass (1024-bit key) header.d=greensocs.com header.b=Z/fDiGzW DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=greensocs.com; s=mail; t=1541502367; bh=oIF9dYQDZUKcoiOrfIYnR2/JYabFthPUu6QvgXLquD8=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=wHQVAkf6wlDJR7xP8nhf8/QaLrSQXLZGgDB9SH1s8gMTGODc1wm42Hydel5svp3fR FYU8RmNTe7w9oqsarQsdzUqq2U7Hjsk+qgAXYbyvVm4VBuKeaWVJa9Tw6X1fURV2No 5eb7bFP4JjJdZ9gGft16SS/pNb8mPBYSOsFKYku8= DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=greensocs.com; s=mail; t=1541502366; bh=oIF9dYQDZUKcoiOrfIYnR2/JYabFthPUu6QvgXLquD8=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=Z/fDiGzWwilnyLG4tgpCtjtP/uex46stNbZmldyjjb5JgOLYOQUnb4rr7tyGfeJ5I il1kzpirlShPqyfpsRLRRQ4/2n9cpor2i1b2M/hIcZgdrzGxtsIlWdFvoN3OtyIj1J wFffDifXNrg+6iBC3546/GvLTWV5cDhZo5YTOGp4= From: Luc Michel To: qemu-devel@nongnu.org Date: Tue, 6 Nov 2018 12:05:37 +0100 Message-Id: <20181106110548.4209-6-luc.michel@greensocs.com> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20181106110548.4209-1-luc.michel@greensocs.com> References: <20181106110548.4209-1-luc.michel@greensocs.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 193.104.36.180 Subject: [Qemu-devel] [PATCH v4 05/16] gdbstub: add multiprocess support to vCont packets X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Peter Maydell , Eduardo Habkost , alistair@alistair23.me, mark.burton@greensocs.com, =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , saipava@xilinx.com, edgari@xilinx.com, qemu-arm@nongnu.org, Luc Michel Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (found 3 invalid signatures) Content-Type: text/plain; charset="utf-8" Add the gdb_first_cpu() and gdb_next_cpu() to iterate over all the CPUs in currently attached processes. Add the gdb_first_cpu_in_process() and gdb_next_cpu_in_process() to iterate over CPUs of a given process. Use them to add multiprocess extension support to vCont packets. Signed-off-by: Luc Michel Reviewed-by: Philippe Mathieu-Daud=C3=A9 --- gdbstub.c | 117 +++++++++++++++++++++++++++++++++++++++++++++++------- 1 file changed, 102 insertions(+), 15 deletions(-) diff --git a/gdbstub.c b/gdbstub.c index 598a89b3ba..ba8b1a3413 100644 --- a/gdbstub.c +++ b/gdbstub.c @@ -716,10 +716,40 @@ static CPUState *find_cpu(uint32_t thread_id) } =20 return NULL; } =20 +static CPUState *get_first_cpu_in_process(const GDBState *s, + GDBProcess *process) +{ + CPUState *cpu; + + CPU_FOREACH(cpu) { + if (gdb_get_cpu_pid(s, cpu) =3D=3D process->pid) { + return cpu; + } + } + + return NULL; +} + +static CPUState *gdb_next_cpu_in_process(const GDBState *s, CPUState *cpu) +{ + uint32_t pid =3D gdb_get_cpu_pid(s, cpu); + cpu =3D CPU_NEXT(cpu); + + while (cpu) { + if (gdb_get_cpu_pid(s, cpu) =3D=3D pid) { + break; + } + + cpu =3D CPU_NEXT(cpu); + } + + return cpu; +} + static CPUState *gdb_get_cpu(const GDBState *s, uint32_t pid, uint32_t tid) { GDBProcess *process; CPUState *cpu =3D find_cpu(tid); =20 @@ -743,10 +773,41 @@ static CPUState *gdb_get_cpu(const GDBState *s, uint3= 2_t pid, uint32_t tid) } =20 return cpu; } =20 +/* Return the cpu following @cpu, while ignoring + * unattached processes. + */ +static CPUState *gdb_next_cpu(const GDBState *s, CPUState *cpu) +{ + cpu =3D CPU_NEXT(cpu); + + while (cpu) { + if (gdb_get_cpu_process(s, cpu)->attached) { + break; + } + + cpu =3D CPU_NEXT(cpu); + } + + return cpu; +} + +/* Return the first attached cpu */ +static CPUState *gdb_first_cpu(const GDBState *s) +{ + CPUState *cpu =3D first_cpu; + GDBProcess *process =3D gdb_get_cpu_process(s, cpu); + + if (!process->attached) { + return gdb_next_cpu(s, cpu); + } + + return cpu; +} + static const char *get_feature_xml(const char *p, const char **newp, CPUClass *cc) { size_t len; int i; @@ -1081,14 +1142,16 @@ static int is_query_packet(const char *p, const cha= r *query, char separator) * returns -ENOTSUP if a command is unsupported, -EINVAL or -ERANGE if the= re is * a format error, 0 on success. */ static int gdb_handle_vcont(GDBState *s, const char *p) { - int res, idx, signal =3D 0; + int res, signal =3D 0; char cur_action; char *newstates; unsigned long tmp; + uint32_t pid, tid; + GDBProcess *process; CPUState *cpu; #ifdef CONFIG_USER_ONLY int max_cpus =3D 1; /* global variable max_cpus exists only in system = mode */ =20 CPU_FOREACH(cpu) { @@ -1127,29 +1190,52 @@ static int gdb_handle_vcont(GDBState *s, const char= *p) } else if (cur_action !=3D 'c' && cur_action !=3D 's') { /* unknown/invalid/unsupported command */ res =3D -ENOTSUP; goto out; } - /* thread specification. special values: (none), -1 =3D all; 0 =3D= any */ - if ((p[0] =3D=3D ':' && p[1] =3D=3D '-' && p[2] =3D=3D '1') || (p[= 0] !=3D ':')) { - if (*p =3D=3D ':') { - p +=3D 3; - } - for (idx =3D 0; idx < max_cpus; idx++) { - if (newstates[idx] =3D=3D 1) { - newstates[idx] =3D cur_action; + + if (*p++ !=3D ':') { + res =3D -ENOTSUP; + goto out; + } + + switch (read_thread_id(p, &p, &pid, &tid)) { + case GDB_READ_THREAD_ERR: + res =3D -EINVAL; + goto out; + + case GDB_ALL_PROCESSES: + cpu =3D gdb_first_cpu(s); + while (cpu) { + if (newstates[cpu->cpu_index] =3D=3D 1) { + newstates[cpu->cpu_index] =3D cur_action; } + + cpu =3D gdb_next_cpu(s, cpu); } - } else if (*p =3D=3D ':') { - p++; - res =3D qemu_strtoul(p, &p, 16, &tmp); - if (res) { + break; + + case GDB_ALL_THREADS: + process =3D gdb_get_process(s, pid); + + if (!process->attached) { + res =3D -EINVAL; goto out; } =20 - /* 0 means any thread, so we pick the first valid CPU */ - cpu =3D tmp ? find_cpu(tmp) : first_cpu; + cpu =3D get_first_cpu_in_process(s, process); + while (cpu) { + if (newstates[cpu->cpu_index] =3D=3D 1) { + newstates[cpu->cpu_index] =3D cur_action; + } + + cpu =3D gdb_next_cpu_in_process(s, cpu); + } + break; + + case GDB_ONE_THREAD: + cpu =3D gdb_get_cpu(s, pid, tid); =20 /* invalid CPU/thread specified */ if (!cpu) { res =3D -EINVAL; goto out; @@ -1157,10 +1243,11 @@ static int gdb_handle_vcont(GDBState *s, const char= *p) =20 /* only use if no previous match occourred */ if (newstates[cpu->cpu_index] =3D=3D 1) { newstates[cpu->cpu_index] =3D cur_action; } + break; } } s->signal =3D signal; gdb_continue_partial(s, newstates); =20 --=20 2.19.1