hooking: Add hook at global scope
[src/app-framework-binder.git] / src / afb-trace.c
index d971d87..2d09840 100644 (file)
@@ -26,7 +26,6 @@
 #include <limits.h>
 #include <unistd.h>
 #include <pthread.h>
-#include <time.h>
 
 #include <json-c/json.h>
 #include <afb/afb-binding-v2.h>
@@ -99,6 +98,7 @@ enum trace_type
        Trace_Type_Ditf,        /* ditf hooks */
        Trace_Type_Svc,         /* svc hooks */
        Trace_Type_Evt,         /* evt hooks */
+       Trace_Type_Global,      /* global hooks */
        Trace_Type_Count        /* count of types of hooks */
 };
 
@@ -163,13 +163,11 @@ static int get_flag(const char *name, struct flag flags[], int count)
 }
 
 /* timestamp */
-static struct json_object *timestamp()
+static struct json_object *timestamp(const struct afb_hookid *hookid)
 {
        char ts[50];
-       struct timespec tv;
 
-       clock_gettime(CLOCK_MONOTONIC, &tv);
-       snprintf(ts, sizeof ts, "%llu.%06lu", (long long unsigned)tv.tv_sec, (long unsigned)(tv.tv_nsec / 1000));
+       snprintf(ts, sizeof ts, "%llu.%06lu", (long long unsigned)hookid->time.tv_sec, (long unsigned)(hookid->time.tv_nsec / 1000));
        return json_object_new_string(ts);
 }
 
@@ -188,7 +186,7 @@ static const char *verbosity_level_name(int level)
 }
 
 /* generic hook */
-static void emit(void *closure, const char *type, const char *fmt1, const char *fmt2, va_list ap2, ...)
+static void emit(void *closure, const struct afb_hookid *hookid, const char *type, const char *fmt1, const char *fmt2, va_list ap2, ...)
 {
        struct hook *hook = closure;
        struct json_object *event, *data1, *data2;
@@ -201,9 +199,11 @@ static void emit(void *closure, const char *type, const char *fmt1, const char *
        if (fmt2)
                wrap_json_vpack(&data2, fmt2, ap2);
 
-       wrap_json_pack(&event, "{so ss so so*}",
-                                       "time", timestamp(),
+       wrap_json_pack(&event, "{so ss ss si so so*}",
+                                       "time", timestamp(hookid),
                                        "tag", hook->tag->tag,
+                                       "type", type,
+                                       "id", (int)(hookid->id & INT_MAX),
                                        type, data1,
                                        "data", data2);
 
@@ -258,7 +258,7 @@ static int get_xreq_flag(const char *name)
        return get_flag(name, xreq_flags, (int)(sizeof xreq_flags / sizeof *xreq_flags));
 }
 
-static void hook_xreq(void *closure, const struct afb_xreq *xreq, const char *action, const char *format, ...)
+static void hook_xreq(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq, const char *action, const char *format, ...)
 {
        struct json_object *cred = NULL;
        const char *session = NULL;
@@ -277,7 +277,7 @@ static void hook_xreq(void *closure, const struct afb_xreq *xreq, const char *ac
                                                "id", xreq->cred->id
                                        );
        va_start(ap, format);
-       emit(closure, "request", "{si ss ss ss so* ss*}", format, ap,
+       emit(closure, hookid, "request", "{si ss ss ss so* ss*}", format, ap,
                                        "index", xreq->hookindex,
                                        "api", xreq->api,
                                        "verb", xreq->verb,
@@ -287,126 +287,126 @@ static void hook_xreq(void *closure, const struct afb_xreq *xreq, const char *ac
        va_end(ap);
 }
 
-static void hook_xreq_begin(void *closure, const struct afb_xreq *xreq)
+static void hook_xreq_begin(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq)
 {
-       hook_xreq(closure, xreq, "begin", NULL);
+       hook_xreq(closure, hookid, xreq, "begin", NULL);
 }
 
-static void hook_xreq_end(void *closure, const struct afb_xreq *xreq)
+static void hook_xreq_end(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq)
 {
-       hook_xreq(closure, xreq, "end", NULL);
+       hook_xreq(closure, hookid, xreq, "end", NULL);
 }
 
-static void hook_xreq_json(void *closure, const struct afb_xreq *xreq, struct json_object *obj)
+static void hook_xreq_json(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq, struct json_object *obj)
 {
-       hook_xreq(closure, xreq, "json", "{sO?}",
+       hook_xreq(closure, hookid, xreq, "json", "{sO?}",
                                                "result", obj);
 }
 
-static void hook_xreq_get(void *closure, const struct afb_xreq *xreq, const char *name, struct afb_arg arg)
+static void hook_xreq_get(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq, const char *name, struct afb_arg arg)
 {
-       hook_xreq(closure, xreq, "get", "{ss? ss? ss? ss?}",
+       hook_xreq(closure, hookid, xreq, "get", "{ss? ss? ss? ss?}",
                                                "query", name,
                                                "name", arg.name,
                                                "value", arg.value,
                                                "path", arg.path);
 }
 
-static void hook_xreq_success(void *closure, const struct afb_xreq *xreq, struct json_object *obj, const char *info)
+static void hook_xreq_success(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq, struct json_object *obj, const char *info)
 {
-       hook_xreq(closure, xreq, "success", "{sO? ss?}",
+       hook_xreq(closure, hookid, xreq, "success", "{sO? ss?}",
                                                "result", obj,
                                                "info", info);
 }
 
-static void hook_xreq_fail(void *closure, const struct afb_xreq *xreq, const char *status, const char *info)
+static void hook_xreq_fail(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq, const char *status, const char *info)
 {
-       hook_xreq(closure, xreq, "fail", "{ss? ss?}",
+       hook_xreq(closure, hookid, xreq, "fail", "{ss? ss?}",
                                                "status", status,
                                                "info", info);
 }
 
-static void hook_xreq_context_get(void *closure, const struct afb_xreq *xreq, void *value)
+static void hook_xreq_context_get(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq, void *value)
 {
-       hook_xreq(closure, xreq, "context_get", NULL);
+       hook_xreq(closure, hookid, xreq, "context_get", NULL);
 }
 
-static void hook_xreq_context_set(void *closure, const struct afb_xreq *xreq, void *value, void (*free_value)(void*))
+static void hook_xreq_context_set(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq, void *value, void (*free_value)(void*))
 {
-       hook_xreq(closure, xreq, "context_set", NULL);
+       hook_xreq(closure, hookid, xreq, "context_set", NULL);
 }
 
-static void hook_xreq_addref(void *closure, const struct afb_xreq *xreq)
+static void hook_xreq_addref(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq)
 {
-       hook_xreq(closure, xreq, "addref", NULL);
+       hook_xreq(closure, hookid, xreq, "addref", NULL);
 }
 
-static void hook_xreq_unref(void *closure, const struct afb_xreq *xreq)
+static void hook_xreq_unref(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq)
 {
-       hook_xreq(closure, xreq, "unref", NULL);
+       hook_xreq(closure, hookid, xreq, "unref", NULL);
 }
 
-static void hook_xreq_session_close(void *closure, const struct afb_xreq *xreq)
+static void hook_xreq_session_close(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq)
 {
-       hook_xreq(closure, xreq, "session_close", NULL);
+       hook_xreq(closure, hookid, xreq, "session_close", NULL);
 }
 
-static void hook_xreq_session_set_LOA(void *closure, const struct afb_xreq *xreq, unsigned level, int result)
+static void hook_xreq_session_set_LOA(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq, unsigned level, int result)
 {
-       hook_xreq(closure, xreq, "session_set_LOA", "{si si}",
+       hook_xreq(closure, hookid, xreq, "session_set_LOA", "{si si}",
                                        "level", level,
                                        "result", result);
 }
 
-static void hook_xreq_subscribe(void *closure, const struct afb_xreq *xreq, struct afb_event event, int result)
+static void hook_xreq_subscribe(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq, struct afb_event event, int result)
 {
-       hook_xreq(closure, xreq, "subscribe", "{s{ss si} si}",
+       hook_xreq(closure, hookid, xreq, "subscribe", "{s{ss si} si}",
                                        "event",
                                                "name", afb_evt_event_name(event),
                                                "id", afb_evt_event_id(event),
                                        "result", result);
 }
 
-static void hook_xreq_unsubscribe(void *closure, const struct afb_xreq *xreq, struct afb_event event, int result)
+static void hook_xreq_unsubscribe(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq, struct afb_event event, int result)
 {
-       hook_xreq(closure, xreq, "unsubscribe", "{s{ss? si} si}",
+       hook_xreq(closure, hookid, xreq, "unsubscribe", "{s{ss? si} si}",
                                        "event",
                                                "name", afb_evt_event_name(event),
                                                "id", afb_evt_event_id(event),
                                        "result", result);
 }
 
-static void hook_xreq_subcall(void *closure, const struct afb_xreq *xreq, const char *api, const char *verb, struct json_object *args)
+static void hook_xreq_subcall(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq, const char *api, const char *verb, struct json_object *args)
 {
-       hook_xreq(closure, xreq, "subcall", "{ss? ss? sO?}",
+       hook_xreq(closure, hookid, xreq, "subcall", "{ss? ss? sO?}",
                                        "api", api,
                                        "verb", verb,
                                        "args", args);
 }
 
-static void hook_xreq_subcall_result(void *closure, const struct afb_xreq *xreq, int status, struct json_object *result)
+static void hook_xreq_subcall_result(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq, int status, struct json_object *result)
 {
-       hook_xreq(closure, xreq, "subcall_result", "{si sO?}",
+       hook_xreq(closure, hookid, xreq, "subcall_result", "{si sO?}",
                                        "status", status,
                                        "result", result);
 }
 
-static void hook_xreq_subcallsync(void *closure, const struct afb_xreq *xreq, const char *api, const char *verb, struct json_object *args)
+static void hook_xreq_subcallsync(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq, const char *api, const char *verb, struct json_object *args)
 {
-       hook_xreq(closure, xreq, "subcallsync", "{ss? ss? sO?}",
+       hook_xreq(closure, hookid, xreq, "subcallsync", "{ss? ss? sO?}",
                                        "api", api,
                                        "verb", verb,
                                        "args", args);
 }
 
-static void hook_xreq_subcallsync_result(void *closure, const struct afb_xreq *xreq, int status, struct json_object *result)
+static void hook_xreq_subcallsync_result(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq, int status, struct json_object *result)
 {
-       hook_xreq(closure, xreq, "subcallsync_result", "{si sO?}",
+       hook_xreq(closure, hookid, xreq, "subcallsync_result", "{si sO?}",
                                        "status", status,
                                        "result", result);
 }
 
-static void hook_xreq_vverbose(void *closure, const struct afb_xreq *xreq, int level, const char *file, int line, const char *func, const char *fmt, va_list args)
+static void hook_xreq_vverbose(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq, int level, const char *file, int line, const char *func, const char *fmt, va_list args)
 {
        struct json_object *pos;
        int len;
@@ -423,7 +423,7 @@ static void hook_xreq_vverbose(void *closure, const struct afb_xreq *xreq, int l
        if (file)
                wrap_json_pack(&pos, "{ss si ss*}", "file", file, "line", line, "function", func);
 
-       hook_xreq(closure, xreq, "vverbose", "{si ss* ss? so*}",
+       hook_xreq(closure, hookid, xreq, "vverbose", "{si ss* ss? so*}",
                                        "level", level,
                                        "type", verbosity_level_name(level),
                                        len < 0 ? "format" : "message", len < 0 ? fmt : msg,
@@ -432,27 +432,27 @@ static void hook_xreq_vverbose(void *closure, const struct afb_xreq *xreq, int l
        free(msg);
 }
 
-static void hook_xreq_store(void *closure, const struct afb_xreq *xreq, struct afb_stored_req *sreq)
+static void hook_xreq_store(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq, struct afb_stored_req *sreq)
 {
-       hook_xreq(closure, xreq, "store", NULL);
+       hook_xreq(closure, hookid, xreq, "store", NULL);
 }
 
-static void hook_xreq_unstore(void *closure, const struct afb_xreq *xreq)
+static void hook_xreq_unstore(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq)
 {
-       hook_xreq(closure, xreq, "unstore", NULL);
+       hook_xreq(closure, hookid, xreq, "unstore", NULL);
 }
 
-static void hook_xreq_subcall_req(void *closure, const struct afb_xreq *xreq, const char *api, const char *verb, struct json_object *args)
+static void hook_xreq_subcall_req(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq, const char *api, const char *verb, struct json_object *args)
 {
-       hook_xreq(closure, xreq, "subcall_req", "{ss? ss? sO?}",
+       hook_xreq(closure, hookid, xreq, "subcall_req", "{ss? ss? sO?}",
                                        "api", api,
                                        "verb", verb,
                                        "args", args);
 }
 
-static void hook_xreq_subcall_req_result(void *closure, const struct afb_xreq *xreq, int status, struct json_object *result)
+static void hook_xreq_subcall_req_result(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq, int status, struct json_object *result)
 {
-       hook_xreq(closure, xreq, "subcall_req_result", "{si sO?}",
+       hook_xreq(closure, hookid, xreq, "subcall_req_result", "{si sO?}",
                                        "status", status,
                                        "result", result);
 }
@@ -513,45 +513,45 @@ static int get_ditf_flag(const char *name)
 }
 
 
-static void hook_ditf(void *closure, const struct afb_ditf *ditf, const char *action, const char *format, ...)
+static void hook_ditf(void *closure, const struct afb_hookid *hookid, const struct afb_ditf *ditf, const char *action, const char *format, ...)
 {
        va_list ap;
 
        va_start(ap, format);
-       emit(closure, "daemon", "{ss ss}", format, ap,
+       emit(closure, hookid, "daemon", "{ss ss}", format, ap,
                                        "api", ditf->api,
                                        "action", action);
        va_end(ap);
 }
 
-static void hook_ditf_event_broadcast_before(void *closure, const struct afb_ditf *ditf, const char *name, struct json_object *object)
+static void hook_ditf_event_broadcast_before(void *closure, const struct afb_hookid *hookid, const struct afb_ditf *ditf, const char *name, struct json_object *object)
 {
-       hook_ditf(closure, ditf, "event_broadcast_before", "{ss sO*}",
+       hook_ditf(closure, hookid, ditf, "event_broadcast_before", "{ss sO*}",
                        "name", name, "data", object);
 }
 
-static void hook_ditf_event_broadcast_after(void *closure, const struct afb_ditf *ditf, const char *name, struct json_object *object, int result)
+static void hook_ditf_event_broadcast_after(void *closure, const struct afb_hookid *hookid, const struct afb_ditf *ditf, const char *name, struct json_object *object, int result)
 {
-       hook_ditf(closure, ditf, "event_broadcast_after", "{ss sO* si}",
+       hook_ditf(closure, hookid, ditf, "event_broadcast_after", "{ss sO* si}",
                        "name", name, "data", object, "result", result);
 }
 
-static void hook_ditf_get_event_loop(void *closure, const struct afb_ditf *ditf, struct sd_event *result)
+static void hook_ditf_get_event_loop(void *closure, const struct afb_hookid *hookid, const struct afb_ditf *ditf, struct sd_event *result)
 {
-       hook_ditf(closure, ditf, "get_event_loop", NULL);
+       hook_ditf(closure, hookid, ditf, "get_event_loop", NULL);
 }
 
-static void hook_ditf_get_user_bus(void *closure, const struct afb_ditf *ditf, struct sd_bus *result)
+static void hook_ditf_get_user_bus(void *closure, const struct afb_hookid *hookid, const struct afb_ditf *ditf, struct sd_bus *result)
 {
-       hook_ditf(closure, ditf, "get_user_bus", NULL);
+       hook_ditf(closure, hookid, ditf, "get_user_bus", NULL);
 }
 
-static void hook_ditf_get_system_bus(void *closure, const struct afb_ditf *ditf, struct sd_bus *result)
+static void hook_ditf_get_system_bus(void *closure, const struct afb_hookid *hookid, const struct afb_ditf *ditf, struct sd_bus *result)
 {
-       hook_ditf(closure, ditf, "get_system_bus", NULL);
+       hook_ditf(closure, hookid, ditf, "get_system_bus", NULL);
 }
 
-static void hook_ditf_vverbose(void*closure, const struct afb_ditf *ditf, int level, const char *file, int line, const char *function, const char *fmt, va_list args)
+static void hook_ditf_vverbose(void *closure, const struct afb_hookid *hookid, const struct afb_ditf *ditf, int level, const char *file, int line, const char *function, const char *fmt, va_list args)
 {
        struct json_object *pos;
        int len;
@@ -568,7 +568,7 @@ static void hook_ditf_vverbose(void*closure, const struct afb_ditf *ditf, int le
        if (file)
                wrap_json_pack(&pos, "{ss si ss*}", "file", file, "line", line, "function", function);
 
-       hook_ditf(closure, ditf, "vverbose", "{si ss* ss? so*}",
+       hook_ditf(closure, hookid, ditf, "vverbose", "{si ss* ss? so*}",
                                        "level", level,
                                        "type", verbosity_level_name(level),
                                        len < 0 ? "format" : "message", len < 0 ? fmt : msg,
@@ -577,13 +577,13 @@ static void hook_ditf_vverbose(void*closure, const struct afb_ditf *ditf, int le
        free(msg);
 }
 
-static void hook_ditf_event_make(void *closure, const struct afb_ditf *ditf, const char *name, struct afb_event result)
+static void hook_ditf_event_make(void *closure, const struct afb_hookid *hookid, const struct afb_ditf *ditf, const char *name, struct afb_event result)
 {
-       hook_ditf(closure, ditf, "event_make", "{ss ss si}",
+       hook_ditf(closure, hookid, ditf, "event_make", "{ss ss si}",
                        "name", name, "event", afb_evt_event_name(result), "id", afb_evt_event_id(result));
 }
 
-static void hook_ditf_rootdir_get_fd(void *closure, const struct afb_ditf *ditf, int result)
+static void hook_ditf_rootdir_get_fd(void *closure, const struct afb_hookid *hookid, const struct afb_ditf *ditf, int result)
 {
        char path[PATH_MAX];
 
@@ -592,12 +592,12 @@ static void hook_ditf_rootdir_get_fd(void *closure, const struct afb_ditf *ditf,
                readlink(path, path, sizeof path);
        }
 
-       hook_ditf(closure, ditf, "rootdir_get_fd", "{ss}",
+       hook_ditf(closure, hookid, ditf, "rootdir_get_fd", "{ss}",
                        result < 0 ? "path" : "error",
                        result < 0 ? strerror(errno) : path);
 }
 
-static void hook_ditf_rootdir_open_locale(void *closure, const struct afb_ditf *ditf, const char *filename, int flags, const char *locale, int result)
+static void hook_ditf_rootdir_open_locale(void *closure, const struct afb_hookid *hookid, const struct afb_ditf *ditf, const char *filename, int flags, const char *locale, int result)
 {
        char path[PATH_MAX];
 
@@ -606,7 +606,7 @@ static void hook_ditf_rootdir_open_locale(void *closure, const struct afb_ditf *
                readlink(path, path, sizeof path);
        }
 
-       hook_ditf(closure, ditf, "rootdir_open_locale", "{ss si ss* ss}",
+       hook_ditf(closure, hookid, ditf, "rootdir_open_locale", "{ss si ss* ss}",
                        "file", filename,
                        "flags", flags,
                        "locale", locale,
@@ -614,24 +614,24 @@ static void hook_ditf_rootdir_open_locale(void *closure, const struct afb_ditf *
                        result < 0 ? strerror(errno) : path);
 }
 
-static void hook_ditf_queue_job(void *closure, const struct afb_ditf *ditf, void (*callback)(int signum, void *arg), void *argument, void *group, int timeout, int result)
+static void hook_ditf_queue_job(void *closure, const struct afb_hookid *hookid, const struct afb_ditf *ditf, void (*callback)(int signum, void *arg), void *argument, void *group, int timeout, int result)
 {
-       hook_ditf(closure, ditf, "queue_job", "{ss}", "result", result);
+       hook_ditf(closure, hookid, ditf, "queue_job", "{ss}", "result", result);
 }
 
-static void hook_ditf_unstore_req(void * closure,  const struct afb_ditf *ditf, struct afb_stored_req *sreq)
+static void hook_ditf_unstore_req(void * closure, const struct afb_hookid *hookid, const struct afb_ditf *ditf, struct afb_stored_req *sreq)
 {
-       hook_ditf(closure, ditf, "unstore_req", NULL);
+       hook_ditf(closure, hookid, ditf, "unstore_req", NULL);
 }
 
-static void hook_ditf_require_api(void *closure, const struct afb_ditf *ditf, const char *name, int initialized)
+static void hook_ditf_require_api(void *closure, const struct afb_hookid *hookid, const struct afb_ditf *ditf, const char *name, int initialized)
 {
-       hook_ditf(closure, ditf, "require_api", "{ss sb}", "name", name, "initialized", initialized);
+       hook_ditf(closure, hookid, ditf, "require_api", "{ss sb}", "name", name, "initialized", initialized);
 }
 
-static void hook_ditf_require_api_result(void *closure, const struct afb_ditf *ditf, const char *name, int initialized, int result)
+static void hook_ditf_require_api_result(void *closure, const struct afb_hookid *hookid, const struct afb_ditf *ditf, const char *name, int initialized, int result)
 {
-       hook_ditf(closure, ditf, "require_api_result", "{ss sb si}", "name", name, "initialized", initialized, "result", result);
+       hook_ditf(closure, hookid, ditf, "require_api_result", "{ss sb si}", "name", name, "initialized", initialized, "result", result);
 }
 
 static struct afb_hook_ditf_itf hook_ditf_itf = {
@@ -672,60 +672,60 @@ static int get_svc_flag(const char *name)
        return get_flag(name, svc_flags, (int)(sizeof svc_flags / sizeof *svc_flags));
 }
 
-static void hook_svc(void *closure, const struct afb_svc *svc, const char *action, const char *format, ...)
+static void hook_svc(void *closure, const struct afb_hookid *hookid, const struct afb_svc *svc, const char *action, const char *format, ...)
 {
        va_list ap;
 
        va_start(ap, format);
-       emit(closure, "service", "{ss ss}", format, ap,
+       emit(closure, hookid, "service", "{ss ss}", format, ap,
                                        "api", svc->api,
                                        "action", action);
        va_end(ap);
 }
 
-static void hook_svc_start_before(void *closure, const struct afb_svc *svc)
+static void hook_svc_start_before(void *closure, const struct afb_hookid *hookid, const struct afb_svc *svc)
 {
-       hook_svc(closure, svc, "start_before", NULL);
+       hook_svc(closure, hookid, svc, "start_before", NULL);
 }
 
-static void hook_svc_start_after(void *closure, const struct afb_svc *svc, int status)
+static void hook_svc_start_after(void *closure, const struct afb_hookid *hookid, const struct afb_svc *svc, int status)
 {
-       hook_svc(closure, svc, "start_after", "{si}", "result", status);
+       hook_svc(closure, hookid, svc, "start_after", "{si}", "result", status);
 }
 
-static void hook_svc_on_event_before(void *closure, const struct afb_svc *svc, const char *event, int eventid, struct json_object *object)
+static void hook_svc_on_event_before(void *closure, const struct afb_hookid *hookid, const struct afb_svc *svc, const char *event, int eventid, struct json_object *object)
 {
-       hook_svc(closure, svc, "on_event_before", "{ss si sO*}",
+       hook_svc(closure, hookid, svc, "on_event_before", "{ss si sO*}",
                        "event", event, "id", eventid, "data", object);
 }
 
-static void hook_svc_on_event_after(void *closure, const struct afb_svc *svc, const char *event, int eventid, struct json_object *object)
+static void hook_svc_on_event_after(void *closure, const struct afb_hookid *hookid, const struct afb_svc *svc, const char *event, int eventid, struct json_object *object)
 {
-       hook_svc(closure, svc, "on_event_after", "{ss si sO*}",
+       hook_svc(closure, hookid, svc, "on_event_after", "{ss si sO*}",
                        "event", event, "id", eventid, "data", object);
 }
 
-static void hook_svc_call(void *closure, const struct afb_svc *svc, const char *api, const char *verb, struct json_object *args)
+static void hook_svc_call(void *closure, const struct afb_hookid *hookid, const struct afb_svc *svc, const char *api, const char *verb, struct json_object *args)
 {
-       hook_svc(closure, svc, "call", "{ss ss sO*}",
+       hook_svc(closure, hookid, svc, "call", "{ss ss sO*}",
                        "api", api, "verb", verb, "args", args);
 }
 
-static void hook_svc_call_result(void *closure, const struct afb_svc *svc, int status, struct json_object *result)
+static void hook_svc_call_result(void *closure, const struct afb_hookid *hookid, const struct afb_svc *svc, int status, struct json_object *result)
 {
-       hook_svc(closure, svc, "call_result", "{si sO*}",
+       hook_svc(closure, hookid, svc, "call_result", "{si sO*}",
                        "status", status, "result", result);
 }
 
-static void hook_svc_callsync(void *closure, const struct afb_svc *svc, const char *api, const char *verb, struct json_object *args)
+static void hook_svc_callsync(void *closure, const struct afb_hookid *hookid, const struct afb_svc *svc, const char *api, const char *verb, struct json_object *args)
 {
-       hook_svc(closure, svc, "callsync", "{ss ss sO*}",
+       hook_svc(closure, hookid, svc, "callsync", "{ss ss sO*}",
                        "api", api, "verb", verb, "args", args);
 }
 
-static void hook_svc_callsync_result(void *closure, const struct afb_svc *svc, int status, struct json_object *result)
+static void hook_svc_callsync_result(void *closure, const struct afb_hookid *hookid, const struct afb_svc *svc, int status, struct json_object *result)
 {
-       hook_svc(closure, svc, "callsync_result", "{si sO*}",
+       hook_svc(closure, hookid, svc, "callsync_result", "{si sO*}",
                        "status", status, "result", result);
 }
 
@@ -763,52 +763,52 @@ static int get_evt_flag(const char *name)
        return get_flag(name, evt_flags, (int)(sizeof evt_flags / sizeof *evt_flags));
 }
 
-static void hook_evt(void *closure, const char *evt, int id, const char *action, const char *format, ...)
+static void hook_evt(void *closure, const struct afb_hookid *hookid, const char *evt, int id, const char *action, const char *format, ...)
 {
        va_list ap;
 
        va_start(ap, format);
-       emit(closure, "event", "{si ss ss}", format, ap,
+       emit(closure, hookid, "event", "{si ss ss}", format, ap,
                                        "id", id,
                                        "name", evt,
                                        "action", action);
        va_end(ap);
 }
 
-static void hook_evt_create(void *closure, const char *evt, int id)
+static void hook_evt_create(void *closure, const struct afb_hookid *hookid, const char *evt, int id)
 {
-       hook_evt(closure, evt, id, "create", NULL);
+       hook_evt(closure, hookid, evt, id, "create", NULL);
 }
 
-static void hook_evt_push_before(void *closure, const char *evt, int id, struct json_object *obj)
+static void hook_evt_push_before(void *closure, const struct afb_hookid *hookid, const char *evt, int id, struct json_object *obj)
 {
-       hook_evt(closure, evt, id, "push_before", "{sO*}", "data", obj);
+       hook_evt(closure, hookid, evt, id, "push_before", "{sO*}", "data", obj);
 }
 
 
-static void hook_evt_push_after(void *closure, const char *evt, int id, struct json_object *obj, int result)
+static void hook_evt_push_after(void *closure, const struct afb_hookid *hookid, const char *evt, int id, struct json_object *obj, int result)
 {
-       hook_evt(closure, evt, id, "push_after", "{sO* si}", "data", obj, "result", result);
+       hook_evt(closure, hookid, evt, id, "push_after", "{sO* si}", "data", obj, "result", result);
 }
 
-static void hook_evt_broadcast_before(void *closure, const char *evt, int id, struct json_object *obj)
+static void hook_evt_broadcast_before(void *closure, const struct afb_hookid *hookid, const char *evt, int id, struct json_object *obj)
 {
-       hook_evt(closure, evt, id, "broadcast_before", "{sO*}", "data", obj);
+       hook_evt(closure, hookid, evt, id, "broadcast_before", "{sO*}", "data", obj);
 }
 
-static void hook_evt_broadcast_after(void *closure, const char *evt, int id, struct json_object *obj, int result)
+static void hook_evt_broadcast_after(void *closure, const struct afb_hookid *hookid, const char *evt, int id, struct json_object *obj, int result)
 {
-       hook_evt(closure, evt, id, "broadcast_after", "{sO* si}", "data", obj, "result", result);
+       hook_evt(closure, hookid, evt, id, "broadcast_after", "{sO* si}", "data", obj, "result", result);
 }
 
-static void hook_evt_name(void *closure, const char *evt, int id)
+static void hook_evt_name(void *closure, const struct afb_hookid *hookid, const char *evt, int id)
 {
-       hook_evt(closure, evt, id, "name", NULL);
+       hook_evt(closure, hookid, evt, id, "name", NULL);
 }
 
-static void hook_evt_drop(void *closure, const char *evt, int id)
+static void hook_evt_drop(void *closure, const struct afb_hookid *hookid, const char *evt, int id)
 {
-       hook_evt(closure, evt, id, "drop", NULL);
+       hook_evt(closure, hookid, evt, id, "drop", NULL);
 }
 
 static struct afb_hook_evt_itf hook_evt_itf = {
@@ -821,6 +821,60 @@ static struct afb_hook_evt_itf hook_evt_itf = {
        .hook_evt_drop = hook_evt_drop
 };
 
+/*******************************************************************************/
+/*****  trace the globals                                                  *****/
+/*******************************************************************************/
+
+static struct flag global_flags[] = { /* must be sorted by names */
+               { "all",                afb_hook_flags_global_all },
+               { "vverbose",           afb_hook_flag_global_vverbose },
+};
+
+/* get the global value for flag of 'name' */
+static int get_global_flag(const char *name)
+{
+       return get_flag(name, global_flags, (int)(sizeof global_flags / sizeof *global_flags));
+}
+
+static void hook_global(void *closure, const struct afb_hookid *hookid, const char *action, const char *format, ...)
+{
+       va_list ap;
+
+       va_start(ap, format);
+       emit(closure, hookid, "global", "{ss}", format, ap, "action", action);
+       va_end(ap);
+}
+
+static void hook_global_vverbose(void *closure, const struct afb_hookid *hookid, int level, const char *file, int line, const char *function, const char *fmt, va_list args)
+{
+       struct json_object *pos;
+       int len;
+       char *msg;
+       va_list ap;
+
+       pos = NULL;
+       msg = NULL;
+
+       va_copy(ap, args);
+       len = vasprintf(&msg, fmt, ap);
+       va_end(ap);
+
+       if (file)
+               wrap_json_pack(&pos, "{ss si ss*}", "file", file, "line", line, "function", function);
+
+       hook_global(closure, hookid, "vverbose", "{si ss* ss? so*}",
+                                       "level", level,
+                                       "type", verbosity_level_name(level),
+                                       len < 0 ? "format" : "message", len < 0 ? fmt : msg,
+                                       "position", pos);
+
+       free(msg);
+}
+
+static struct afb_hook_global_itf hook_global_itf = {
+       .hook_global_vverbose = hook_global_vverbose,
+};
+
 /*******************************************************************************/
 /*****  abstract types                                                     *****/
 /*******************************************************************************/
@@ -857,7 +911,13 @@ abstracting[Trace_Type_Count] =
                .name = "event",
                .unref =  (void(*)(void*))afb_hook_unref_evt,
                .get_flag = get_evt_flag
-       }
+       },
+       [Trace_Type_Global] =
+       {
+               .name = "global",
+               .unref =  (void(*)(void*))afb_hook_unref_global,
+               .get_flag = get_global_flag
+       },
 };
 
 /*******************************************************************************/
@@ -1150,6 +1210,9 @@ static void addhook(struct desc *desc, enum trace_type type)
        case Trace_Type_Evt:
                hook->handler = afb_hook_create_evt(desc->pattern, desc->flags[type], &hook_evt_itf, hook);
                break;
+       case Trace_Type_Global:
+               hook->handler = afb_hook_create_global(desc->flags[type], &hook_global_itf, hook);
+               break;
        default:
                break;
        }
@@ -1215,17 +1278,22 @@ static void add_evt_flags(void *closure, struct json_object *object)
        add_flags(closure, object, Trace_Type_Evt);
 }
 
+static void add_global_flags(void *closure, struct json_object *object)
+{
+       add_flags(closure, object, Trace_Type_Global);
+}
+
 /* add hooks */
 static void add(void *closure, struct json_object *object)
 {
        int rc;
        struct desc desc;
-       struct json_object *request, *event, *daemon, *service, *sub;
+       struct json_object *request, *event, *daemon, *service, *sub, *global;
 
        memcpy (&desc, closure, sizeof desc);
-       request = event = daemon = service = sub = NULL;
+       request = event = daemon = service = sub = global = NULL;
 
-       rc = wrap_json_unpack(object, "{s?s s?s s?s s?s s?s s?s s?o s?o s?o s?o s?o}",
+       rc = wrap_json_unpack(object, "{s?s s?s s?s s?s s?s s?s s?o s?o s?o s?o s?o s?o}",
                        "name", &desc.name,
                        "tag", &desc.tag,
                        "api", &desc.api,
@@ -1236,6 +1304,7 @@ static void add(void *closure, struct json_object *object)
                        "daemon", &daemon,
                        "service", &service,
                        "event", &event,
+                       "global", &global,
                        "for", &sub);
 
        if (!rc) {
@@ -1262,6 +1331,9 @@ static void add(void *closure, struct json_object *object)
                if (event)
                        wrap_json_optarray_for_all(event, add_evt_flags, &desc);
 
+               if (global)
+                       wrap_json_optarray_for_all(global, add_global_flags, &desc);
+
                /* apply */
                if (sub)
                        wrap_json_optarray_for_all(sub, add, &desc);