From patchwork Mon Sep 19 14:49:02 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?q?Daniel_P=2E_Berrang=C3=A9?= X-Patchwork-Id: 671790 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 3sd8TB11Zzz9s9x for ; Tue, 20 Sep 2016 01:10:22 +1000 (AEST) Received: from localhost ([::1]:56016 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bm0D5-0007K3-Oa for incoming@patchwork.ozlabs.org; Mon, 19 Sep 2016 11:10:19 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:36388) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1blzt2-0007Aj-FD for qemu-devel@nongnu.org; Mon, 19 Sep 2016 10:49:40 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1blzsw-0005wA-SX for qemu-devel@nongnu.org; Mon, 19 Sep 2016 10:49:35 -0400 Received: from mx1.redhat.com ([209.132.183.28]:48606) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1blzsw-0005w0-Jx for qemu-devel@nongnu.org; Mon, 19 Sep 2016 10:49:30 -0400 Received: from int-mx14.intmail.prod.int.phx2.redhat.com (int-mx14.intmail.prod.int.phx2.redhat.com [10.5.11.27]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 0D0163D94E; Mon, 19 Sep 2016 14:49:30 +0000 (UTC) Received: from t530wlan.home.berrange.com.com (vpn1-5-73.ams2.redhat.com [10.36.5.73]) by int-mx14.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id u8JEnDAc017584; Mon, 19 Sep 2016 10:49:28 -0400 From: "Daniel P. Berrange" To: qemu-devel@nongnu.org Date: Mon, 19 Sep 2016 15:49:02 +0100 Message-Id: <1474296549-29171-12-git-send-email-berrange@redhat.com> In-Reply-To: <1474296549-29171-1-git-send-email-berrange@redhat.com> References: <1474296549-29171-1-git-send-email-berrange@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.27 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.30]); Mon, 19 Sep 2016 14:49:30 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v3 11/18] trace: provide mechanism for registering trace events 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: =?UTF-8?q?Llu=C3=ADs=20Vilanova?= , Stefan Hajnoczi Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" Remove the notion of there being a single global array of trace events, by introducing a method for registering groups of events. Signed-off-by: Daniel P. Berrange --- include/qemu/module.h | 2 ++ qemu-img.c | 1 + qemu-io.c | 1 + qemu-nbd.c | 1 + scripts/tracetool/format/events_c.py | 6 ++++++ trace/control-internal.h | 4 +++- trace/control.c | 25 +++++++++++++++++++++++-- trace/control.h | 1 + vl.c | 2 ++ 9 files changed, 40 insertions(+), 3 deletions(-) diff --git a/include/qemu/module.h b/include/qemu/module.h index 2370708..c700961 100644 --- a/include/qemu/module.h +++ b/include/qemu/module.h @@ -44,6 +44,7 @@ typedef enum { MODULE_INIT_OPTS, MODULE_INIT_QAPI, MODULE_INIT_QOM, + MODULE_INIT_TRACE, MODULE_INIT_MAX } module_init_type; @@ -51,6 +52,7 @@ typedef enum { #define opts_init(function) module_init(function, MODULE_INIT_OPTS) #define qapi_init(function) module_init(function, MODULE_INIT_QAPI) #define type_init(function) module_init(function, MODULE_INIT_QOM) +#define trace_init(function) module_init(function, MODULE_INIT_TRACE) void register_module_init(void (*fn)(void), module_init_type type); void register_dso_module_init(void (*fn)(void), module_init_type type); diff --git a/qemu-img.c b/qemu-img.c index ea52486..bbe648a 100644 --- a/qemu-img.c +++ b/qemu-img.c @@ -3824,6 +3824,7 @@ int main(int argc, char **argv) signal(SIGPIPE, SIG_IGN); #endif + module_call_init(MODULE_INIT_TRACE); error_set_progname(argv[0]); qemu_init_exec_dir(argv[0]); diff --git a/qemu-io.c b/qemu-io.c index db129ea..23a229f 100644 --- a/qemu-io.c +++ b/qemu-io.c @@ -467,6 +467,7 @@ int main(int argc, char **argv) signal(SIGPIPE, SIG_IGN); #endif + module_call_init(MODULE_INIT_TRACE); progname = basename(argv[0]); qemu_init_exec_dir(argv[0]); diff --git a/qemu-nbd.c b/qemu-nbd.c index 99297a5..361880b 100644 --- a/qemu-nbd.c +++ b/qemu-nbd.c @@ -533,6 +533,7 @@ int main(int argc, char **argv) sa_sigterm.sa_handler = termsig_handler; sigaction(SIGTERM, &sa_sigterm, NULL); + module_call_init(MODULE_INIT_TRACE); qcrypto_init(&error_fatal); module_call_init(MODULE_INIT_QOM); diff --git a/scripts/tracetool/format/events_c.py b/scripts/tracetool/format/events_c.py index 07665df..7f00b50 100644 --- a/scripts/tracetool/format/events_c.py +++ b/scripts/tracetool/format/events_c.py @@ -61,3 +61,9 @@ def generate(events, backend): out(' NULL,', '};', '') + + out('static void trace_register_events(void)', + '{', + ' trace_event_register_group(trace_events);', + '}', + 'trace_init(trace_register_events)') diff --git a/trace/control-internal.h b/trace/control-internal.h index c5bb53d..7de9ddd 100644 --- a/trace/control-internal.h +++ b/trace/control-internal.h @@ -15,7 +15,6 @@ #include "qom/cpu.h" -extern TraceEvent *trace_events[]; extern int trace_events_enabled_count; @@ -82,4 +81,7 @@ static inline bool trace_event_get_vcpu_state_dynamic(CPUState *vcpu, return trace_event_get_vcpu_state_dynamic_by_vcpu_id(vcpu, vcpu_id); } + +void trace_event_register_group(TraceEvent **events); + #endif /* TRACE__CONTROL_INTERNAL_H */ diff --git a/trace/control.c b/trace/control.c index 60235c5..2db7196 100644 --- a/trace/control.c +++ b/trace/control.c @@ -29,6 +29,13 @@ int trace_events_enabled_count; +typedef struct TraceEventGroup { + TraceEvent **events; +} TraceEventGroup; + +static TraceEventGroup *event_groups; +static size_t nevent_groups; + QemuOptsList qemu_trace_opts = { .name = "trace", .implied_opt_name = "enable", @@ -50,6 +57,14 @@ QemuOptsList qemu_trace_opts = { }; +void trace_event_register_group(TraceEvent **events) +{ + event_groups = g_renew(TraceEventGroup, event_groups, nevent_groups + 1); + event_groups[nevent_groups].events = events; + nevent_groups++; +} + + TraceEvent *trace_event_name(const char *name) { assert(name != NULL); @@ -100,14 +115,20 @@ static bool pattern_glob(const char *pat, const char *ev) void trace_event_iter_init(TraceEventIter *iter, const char *pattern) { iter->event = 0; + iter->group = 0; iter->pattern = pattern; } TraceEvent *trace_event_iter_next(TraceEventIter *iter) { - while (trace_events[iter->event] != NULL) { - TraceEvent *ev = trace_events[iter->event]; + while (iter->group < nevent_groups && + event_groups[iter->group].events[iter->event] != NULL) { + TraceEvent *ev = event_groups[iter->group].events[iter->event]; iter->event++; + if (event_groups[iter->group].events[iter->event] == NULL) { + iter->event = 0; + iter->group++; + } if (!iter->pattern || pattern_glob(iter->pattern, trace_event_get_name(ev))) { diff --git a/trace/control.h b/trace/control.h index c7c0a88..265e387 100644 --- a/trace/control.h +++ b/trace/control.h @@ -15,6 +15,7 @@ typedef struct TraceEventIter { size_t event; + size_t group; const char *pattern; } TraceEventIter; diff --git a/vl.c b/vl.c index ad2664b..88f5b36 100644 --- a/vl.c +++ b/vl.c @@ -2979,6 +2979,8 @@ int main(int argc, char **argv, char **envp) Error *err = NULL; bool list_data_dirs = false; + module_call_init(MODULE_INIT_TRACE); + qemu_init_cpu_loop(); qemu_mutex_lock_iothread();