diff options
Diffstat (limited to 'trace')
| -rw-r--r-- | trace/Makefile.objs | 1 | ||||
| -rw-r--r-- | trace/control.c | 13 | ||||
| -rw-r--r-- | trace/control.h | 7 | ||||
| -rw-r--r-- | trace/qmp.c | 75 |
4 files changed, 76 insertions, 20 deletions
diff --git a/trace/Makefile.objs b/trace/Makefile.objs index 46de95c1a6..32f7a32ce2 100644 --- a/trace/Makefile.objs +++ b/trace/Makefile.objs @@ -144,3 +144,4 @@ util-obj-$(CONFIG_TRACE_SIMPLE) += simple.o generated-tracers.o util-obj-$(CONFIG_TRACE_FTRACE) += ftrace.o util-obj-$(CONFIG_TRACE_UST) += generated-ust.o util-obj-y += control.o +util-obj-y += qmp.o diff --git a/trace/control.c b/trace/control.c index 9631a40eff..0d308011a2 100644 --- a/trace/control.c +++ b/trace/control.c @@ -85,19 +85,6 @@ TraceEvent *trace_event_pattern(const char *pat, TraceEvent *ev) return NULL; } -void trace_print_events(FILE *stream, fprintf_function stream_printf) -{ - TraceEventID i; - - for (i = 0; i < trace_event_count(); i++) { - TraceEvent *ev = trace_event_id(i); - stream_printf(stream, "%s [Event ID %u] : state %u\n", - trace_event_get_name(ev), i, - trace_event_get_state_static(ev) && - trace_event_get_state_dynamic(ev)); - } -} - static void trace_init_events(const char *fname) { Location loc; diff --git a/trace/control.h b/trace/control.h index e1ec033705..da9bb6b774 100644 --- a/trace/control.h +++ b/trace/control.h @@ -149,13 +149,6 @@ static void trace_event_set_state_dynamic(TraceEvent *ev, bool state); /** - * trace_print_events: - * - * Print the state of all events. - */ -void trace_print_events(FILE *stream, fprintf_function stream_printf); - -/** * trace_init_backends: * @events: Name of file with events to be enabled at startup; may be NULL. * Corresponds to commandline option "-trace events=...". diff --git a/trace/qmp.c b/trace/qmp.c new file mode 100644 index 0000000000..0b19489528 --- /dev/null +++ b/trace/qmp.c @@ -0,0 +1,75 @@ +/* + * QMP commands for tracing events. + * + * Copyright (C) 2014 Lluís Vilanova <vilanova@ac.upc.edu> + * + * This work is licensed under the terms of the GNU GPL, version 2 or later. + * See the COPYING file in the top-level directory. + */ + +#include "qemu/typedefs.h" +#include "qmp-commands.h" +#include "trace/control.h" + + +TraceEventInfoList *qmp_trace_event_get_state(const char *name, Error **errp) +{ + TraceEventInfoList *events = NULL; + bool found = false; + TraceEvent *ev; + + ev = NULL; + while ((ev = trace_event_pattern(name, ev)) != NULL) { + TraceEventInfoList *elem = g_new(TraceEventInfoList, 1); + elem->value = g_new(TraceEventInfo, 1); + elem->value->name = g_strdup(trace_event_get_name(ev)); + if (!trace_event_get_state_static(ev)) { + elem->value->state = TRACE_EVENT_STATE_UNAVAILABLE; + } else if (!trace_event_get_state_dynamic(ev)) { + elem->value->state = TRACE_EVENT_STATE_DISABLED; + } else { + elem->value->state = TRACE_EVENT_STATE_ENABLED; + } + elem->next = events; + events = elem; + found = true; + } + + if (!found && !trace_event_is_pattern(name)) { + error_setg(errp, "unknown event \"%s\"", name); + } + + return events; +} + +void qmp_trace_event_set_state(const char *name, bool enable, + bool has_ignore_unavailable, + bool ignore_unavailable, Error **errp) +{ + bool found = false; + TraceEvent *ev; + + /* Check all selected events are dynamic */ + ev = NULL; + while ((ev = trace_event_pattern(name, ev)) != NULL) { + found = true; + if (!(has_ignore_unavailable && ignore_unavailable) && + !trace_event_get_state_static(ev)) { + error_setg(errp, "cannot set dynamic tracing state for \"%s\"", + trace_event_get_name(ev)); + return; + } + } + if (!found && !trace_event_is_pattern(name)) { + error_setg(errp, "unknown event \"%s\"", name); + return; + } + + /* Apply changes */ + ev = NULL; + while ((ev = trace_event_pattern(name, ev)) != NULL) { + if (trace_event_get_state_static(ev)) { + trace_event_set_state_dynamic(ev, enable); + } + } +} |