aboutsummaryrefslogtreecommitdiff
path: root/trace
diff options
context:
space:
mode:
authorDaniel P. Berrange <berrange@redhat.com>2016-10-04 14:35:43 +0100
committerStefan Hajnoczi <stefanha@redhat.com>2016-10-12 09:35:54 +0200
commit0d4e995c7368f8bdc8845beb499b650386a38819 (patch)
treea2daca965ac8ccf0e9e54ab6a71c60c74b2a2e23 /trace
parent6a1b0f3aea09142cb8989ccffb3b74bb8808a00f (diff)
downloadqemu-arm-0d4e995c7368f8bdc8845beb499b650386a38819.tar.gz
trace: convert code to use event iterators
This converts the HMP/QMP monitor API implementations and some internal trace control methods to use the new trace event iterator APIs. Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Daniel P. Berrange <berrange@redhat.com> Reviewed-by: LluĂ­s Vilanova <vilanova@ac.upc.edu> Message-id: 1475588159-30598-5-git-send-email-berrange@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'trace')
-rw-r--r--trace/control-target.c8
-rw-r--r--trace/control.c77
-rw-r--r--trace/qmp.c16
3 files changed, 55 insertions, 46 deletions
diff --git a/trace/control-target.c b/trace/control-target.c
index 52fcce5a00..50bac4fb7d 100644
--- a/trace/control-target.c
+++ b/trace/control-target.c
@@ -98,9 +98,10 @@ static bool adding_first_cpu(void)
void trace_init_vcpu(CPUState *vcpu)
{
- TraceEvent *ev = NULL;
-
- while ((ev = trace_event_pattern("*", ev)) != NULL) {
+ TraceEventIter iter;
+ TraceEvent *ev;
+ trace_event_iter_init(&iter, NULL);
+ while ((ev = trace_event_iter_next(&iter)) != NULL) {
if (trace_event_is_vcpu(ev) &&
trace_event_get_state_static(ev) &&
trace_event_get_state_dynamic(ev)) {
@@ -118,6 +119,5 @@ void trace_init_vcpu(CPUState *vcpu)
}
}
}
-
trace_guest_cpu_enter(vcpu);
}
diff --git a/trace/control.c b/trace/control.c
index 5a9bb5a8c7..a107cc370f 100644
--- a/trace/control.c
+++ b/trace/control.c
@@ -60,9 +60,10 @@ TraceEvent *trace_event_name(const char *name)
{
assert(name != NULL);
- TraceEventID i;
- for (i = 0; i < trace_event_count(); i++) {
- TraceEvent *ev = trace_event_id(i);
+ TraceEventIter iter;
+ TraceEvent *ev;
+ trace_event_iter_init(&iter, NULL);
+ while ((ev = trace_event_iter_next(&iter)) != NULL) {
if (strcmp(trace_event_get_name(ev), name) == 0) {
return ev;
}
@@ -105,21 +106,18 @@ TraceEvent *trace_event_pattern(const char *pat, TraceEvent *ev)
{
assert(pat != NULL);
- TraceEventID i;
-
- if (ev == NULL) {
- i = -1;
- } else {
- i = trace_event_get_id(ev);
- }
- i++;
-
- while (i < trace_event_count()) {
- TraceEvent *res = trace_event_id(i);
- if (pattern_glob(pat, trace_event_get_name(res))) {
- return res;
+ bool matched = ev ? false : true;
+ TraceEventIter iter;
+ TraceEvent *thisev;
+ trace_event_iter_init(&iter, pat);
+ while ((thisev = trace_event_iter_next(&iter)) != NULL) {
+ if (matched) {
+ return thisev;
+ } else {
+ if (ev == thisev) {
+ matched = true;
+ }
}
- i++;
}
return NULL;
@@ -148,10 +146,11 @@ TraceEvent *trace_event_iter_next(TraceEventIter *iter)
void trace_list_events(void)
{
- int i;
- for (i = 0; i < trace_event_count(); i++) {
- TraceEvent *res = trace_event_id(i);
- fprintf(stderr, "%s\n", trace_event_get_name(res));
+ TraceEventIter iter;
+ TraceEvent *ev;
+ trace_event_iter_init(&iter, NULL);
+ while ((ev = trace_event_iter_next(&iter)) != NULL) {
+ fprintf(stderr, "%s\n", trace_event_get_name(ev));
}
}
@@ -159,26 +158,32 @@ static void do_trace_enable_events(const char *line_buf)
{
const bool enable = ('-' != line_buf[0]);
const char *line_ptr = enable ? line_buf : line_buf + 1;
+ TraceEventIter iter;
+ TraceEvent *ev;
+ bool is_pattern = trace_event_is_pattern(line_ptr);
- if (trace_event_is_pattern(line_ptr)) {
- TraceEvent *ev = NULL;
- while ((ev = trace_event_pattern(line_ptr, ev)) != NULL) {
- if (trace_event_get_state_static(ev)) {
- trace_event_set_state_dynamic_init(ev, enable);
+ trace_event_iter_init(&iter, line_ptr);
+ while ((ev = trace_event_iter_next(&iter)) != NULL) {
+ if (!trace_event_get_state_static(ev)) {
+ if (!is_pattern) {
+ error_report("WARNING: trace event '%s' is not traceable",
+ line_ptr);
+ return;
}
+ continue;
}
- } else {
- TraceEvent *ev = trace_event_name(line_ptr);
- if (ev == NULL) {
- error_report("WARNING: trace event '%s' does not exist",
- line_ptr);
- } else if (!trace_event_get_state_static(ev)) {
- error_report("WARNING: trace event '%s' is not traceable",
- line_ptr);
- } else {
- trace_event_set_state_dynamic_init(ev, enable);
+
+ /* start tracing */
+ trace_event_set_state_dynamic(ev, enable);
+ if (!is_pattern) {
+ return;
}
}
+
+ if (!is_pattern) {
+ error_report("WARNING: trace event '%s' does not exist",
+ line_ptr);
+ }
}
void trace_enable_events(const char *line_buf)
diff --git a/trace/qmp.c b/trace/qmp.c
index 11d2564e7b..ac777d154f 100644
--- a/trace/qmp.c
+++ b/trace/qmp.c
@@ -52,8 +52,10 @@ static bool check_events(bool has_vcpu, bool ignore_unavailable, bool is_pattern
return true;
} else {
/* error for unavailable events */
- TraceEvent *ev = NULL;
- while ((ev = trace_event_pattern(name, ev)) != NULL) {
+ TraceEventIter iter;
+ TraceEvent *ev;
+ trace_event_iter_init(&iter, name);
+ while ((ev = trace_event_iter_next(&iter)) != NULL) {
if (!ignore_unavailable && !trace_event_get_state_static(ev)) {
error_setg(errp, "event \"%s\" is disabled", trace_event_get_name(ev));
return false;
@@ -69,6 +71,7 @@ TraceEventInfoList *qmp_trace_event_get_state(const char *name,
{
Error *err = NULL;
TraceEventInfoList *events = NULL;
+ TraceEventIter iter;
TraceEvent *ev;
bool is_pattern = trace_event_is_pattern(name);
CPUState *cpu;
@@ -86,8 +89,8 @@ TraceEventInfoList *qmp_trace_event_get_state(const char *name,
}
/* Get states (all errors checked above) */
- ev = NULL;
- while ((ev = trace_event_pattern(name, ev)) != NULL) {
+ trace_event_iter_init(&iter, name);
+ while ((ev = trace_event_iter_next(&iter)) != NULL) {
TraceEventInfoList *elem;
bool is_vcpu = trace_event_is_vcpu(ev);
if (has_vcpu && !is_vcpu) {
@@ -132,6 +135,7 @@ void qmp_trace_event_set_state(const char *name, bool enable,
Error **errp)
{
Error *err = NULL;
+ TraceEventIter iter;
TraceEvent *ev;
bool is_pattern = trace_event_is_pattern(name);
CPUState *cpu;
@@ -150,8 +154,8 @@ void qmp_trace_event_set_state(const char *name, bool enable,
}
/* Apply changes (all errors checked above) */
- ev = NULL;
- while ((ev = trace_event_pattern(name, ev)) != NULL) {
+ trace_event_iter_init(&iter, name);
+ while ((ev = trace_event_iter_next(&iter)) != NULL) {
if (!trace_event_get_state_static(ev) ||
(has_vcpu && !trace_event_is_vcpu(ev))) {
continue;