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authorPeter Maydell <peter.maydell@linaro.org>2014-01-31 11:13:08 +0000
committerPeter Maydell <peter.maydell@linaro.org>2014-01-31 11:13:08 +0000
commit89e4a51ca9546a7bbe1998c4e3d4a3ac3a0c19be (patch)
tree7ec9555d2e4a7321a482413cd24aa9881dce7cac
parent0159a64397fc8e6c85de73613d83a3612c840664 (diff)
parent736ec1677f1ae7e64f2f3436ca3775c48f79678c (diff)
downloadqemu-arm-89e4a51ca9546a7bbe1998c4e3d4a3ac3a0c19be.tar.gz
Merge remote-tracking branch 'stefanha/tags/tracing-pull-request' into staging
Tracing pull request # gpg: Signature made Mon 27 Jan 2014 14:51:09 GMT using RSA key ID 81AB73C8 # gpg: Good signature from "Stefan Hajnoczi <stefanha@redhat.com>" # gpg: aka "Stefan Hajnoczi <stefanha@gmail.com>" # gpg: WARNING: This key is not certified with a trusted signature! # gpg: There is no indication that the signature belongs to the owner. # Primary key fingerprint: 8695 A8BF D3F9 7CDA AC35 775A 9CA4 ABB3 81AB 73C8 * stefanha/tags/tracing-pull-request: trace: fix simple trace "disable" keyword trace: add glib 2.32+ static GMutex support trace: [simple] Do not include "trace/simple.h" in generated tracer headers tracing: start trace processing thread in final child process Message-id: 1390834386-23139-1-git-send-email-stefanha@redhat.com Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
-rw-r--r--scripts/tracetool/backend/simple.py6
-rw-r--r--trace/simple.c24
-rw-r--r--vl.c12
3 files changed, 29 insertions, 13 deletions
diff --git a/scripts/tracetool/backend/simple.py b/scripts/tracetool/backend/simple.py
index 37ef599324..3dde372e46 100644
--- a/scripts/tracetool/backend/simple.py
+++ b/scripts/tracetool/backend/simple.py
@@ -56,7 +56,7 @@ def c(events):
out('',
- ' TraceEvent *eventp = trace_event_id(%(event_id)s);',
+ ' TraceEvent *eventp = trace_event_id(%(event_enum)s);',
' bool _state = trace_event_get_state_dynamic(eventp);',
' if (!_state) {',
' return;',
@@ -65,6 +65,7 @@ def c(events):
' if (trace_record_start(&rec, %(event_id)s, %(size_str)s)) {',
' return; /* Trace Buffer Full, Event Dropped ! */',
' }',
+ event_enum = 'TRACE_' + event.name.upper(),
event_id = num,
size_str = sizestr,
)
@@ -93,9 +94,6 @@ def c(events):
def h(events):
- out('#include "trace/simple.h"',
- '')
-
for event in events:
out('void trace_%(name)s(%(args)s);',
name = event.name,
diff --git a/trace/simple.c b/trace/simple.c
index 1e3f6914c5..57572c4905 100644
--- a/trace/simple.c
+++ b/trace/simple.c
@@ -19,6 +19,7 @@
#include "qemu/timer.h"
#include "trace.h"
#include "trace/control.h"
+#include "trace/simple.h"
/** Trace file header event ID */
#define HEADER_EVENT_ID (~(uint64_t)0) /* avoids conflicting with TraceEventIDs */
@@ -39,7 +40,17 @@
* Trace records are written out by a dedicated thread. The thread waits for
* records to become available, writes them out, and then waits again.
*/
+#if GLIB_CHECK_VERSION(2, 32, 0)
+static GMutex trace_lock;
+#define lock_trace_lock() g_mutex_lock(&trace_lock)
+#define unlock_trace_lock() g_mutex_unlock(&trace_lock)
+#define get_trace_lock_mutex() (&trace_lock)
+#else
static GStaticMutex trace_lock = G_STATIC_MUTEX_INIT;
+#define lock_trace_lock() g_static_mutex_lock(&trace_lock)
+#define unlock_trace_lock() g_static_mutex_unlock(&trace_lock)
+#define get_trace_lock_mutex() g_static_mutex_get_mutex(&trace_lock)
+#endif
/* g_cond_new() was deprecated in glib 2.31 but we still need to support it */
#if GLIB_CHECK_VERSION(2, 31, 0)
@@ -139,27 +150,26 @@ static bool get_trace_record(unsigned int idx, TraceRecord **recordptr)
*/
static void flush_trace_file(bool wait)
{
- g_static_mutex_lock(&trace_lock);
+ lock_trace_lock();
trace_available = true;
g_cond_signal(trace_available_cond);
if (wait) {
- g_cond_wait(trace_empty_cond, g_static_mutex_get_mutex(&trace_lock));
+ g_cond_wait(trace_empty_cond, get_trace_lock_mutex());
}
- g_static_mutex_unlock(&trace_lock);
+ unlock_trace_lock();
}
static void wait_for_trace_records_available(void)
{
- g_static_mutex_lock(&trace_lock);
+ lock_trace_lock();
while (!(trace_available && trace_writeout_enabled)) {
g_cond_signal(trace_empty_cond);
- g_cond_wait(trace_available_cond,
- g_static_mutex_get_mutex(&trace_lock));
+ g_cond_wait(trace_available_cond, get_trace_lock_mutex());
}
trace_available = false;
- g_static_mutex_unlock(&trace_lock);
+ unlock_trace_lock();
}
static gpointer writeout_thread(gpointer opaque)
diff --git a/vl.c b/vl.c
index 2b478664a5..c73462e811 100644
--- a/vl.c
+++ b/vl.c
@@ -3879,8 +3879,10 @@ int main(int argc, char **argv, char **envp)
qemu_set_log(mask);
}
- if (!trace_backend_init(trace_events, trace_file)) {
- exit(1);
+ if (!is_daemonized()) {
+ if (!trace_backend_init(trace_events, trace_file)) {
+ exit(1);
+ }
}
/* If no data_dir is specified then try to find it relative to the
@@ -4379,6 +4381,12 @@ int main(int argc, char **argv, char **envp)
os_setup_post();
+ if (is_daemonized()) {
+ if (!trace_backend_init(trace_events, trace_file)) {
+ exit(1);
+ }
+ }
+
main_loop();
bdrv_close_all();
pause_all_vcpus();