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[Qemu-devel] [PULL 07/15] trace: split trace_init_file out of trace_init
From: |
Stefan Hajnoczi |
Subject: |
[Qemu-devel] [PULL 07/15] trace: split trace_init_file out of trace_init_backends |
Date: |
Tue, 10 Nov 2015 13:31:40 +0000 |
From: Paolo Bonzini <address@hidden>
This is cleaner, and improves error reporting with -daemonize.
Signed-off-by: Paolo Bonzini <address@hidden>
Signed-off-by: Denis V. Lunev <address@hidden>
Acked-by: Christian Borntraeger <address@hidden>
Message-id: address@hidden
Signed-off-by: Stefan Hajnoczi <address@hidden>
---
qemu-io.c | 2 +-
trace/control.c | 17 ++++++++++++-----
trace/control.h | 13 ++++++++++++-
trace/simple.c | 6 ++----
trace/simple.h | 4 ++--
vl.c | 13 +++++++++----
6 files changed, 38 insertions(+), 17 deletions(-)
diff --git a/qemu-io.c b/qemu-io.c
index d6fa11b..fbddf82 100644
--- a/qemu-io.c
+++ b/qemu-io.c
@@ -440,7 +440,7 @@ int main(int argc, char **argv)
}
break;
case 'T':
- if (!trace_init_backends(optarg)) {
+ if (!trace_init_backends()) {
exit(1); /* error message will have been printed */
}
break;
diff --git a/trace/control.c b/trace/control.c
index 931d64c..f5a497a 100644
--- a/trace/control.c
+++ b/trace/control.c
@@ -145,17 +145,24 @@ void trace_init_events(const char *fname)
loc_pop(&loc);
}
-bool trace_init_backends(const char *file)
+void trace_init_file(const char *file)
{
#ifdef CONFIG_TRACE_SIMPLE
- if (!st_init(file)) {
- fprintf(stderr, "failed to initialize simple tracing backend.\n");
- return false;
- }
+ st_set_trace_file(file);
#else
if (file) {
fprintf(stderr, "error: -trace file=...: "
"option not supported by the selected tracing backends\n");
+ exit(1);
+ }
+#endif
+}
+
+bool trace_init_backends(void)
+{
+#ifdef CONFIG_TRACE_SIMPLE
+ if (!st_init()) {
+ fprintf(stderr, "failed to initialize simple tracing backend.\n");
return false;
}
#endif
diff --git a/trace/control.h b/trace/control.h
index 7905917..d50f399 100644
--- a/trace/control.h
+++ b/trace/control.h
@@ -157,7 +157,7 @@ static void trace_event_set_state_dynamic(TraceEvent *ev,
bool state);
*
* Returns: Whether the backends could be successfully initialized.
*/
-bool trace_init_backends(const char *file);
+bool trace_init_backends(void);
/**
* trace_init_events:
@@ -170,6 +170,17 @@ bool trace_init_backends(const char *file);
*/
void trace_init_events(const char *file);
+/**
+ * trace_init_file:
+ * @file: Name of trace output file; may be NULL.
+ * Corresponds to commandline option "-trace file=...".
+ *
+ * Record the name of the output file for the tracing backend.
+ * Exits if no selected backend does not support specifying the
+ * output file, and a non-NULL file was passed.
+ */
+void trace_init_file(const char *file);
+
#include "trace/control-internal.h"
diff --git a/trace/simple.c b/trace/simple.c
index 11ad030..a4bc705 100644
--- a/trace/simple.c
+++ b/trace/simple.c
@@ -322,7 +322,7 @@ void st_set_trace_file_enabled(bool enable)
* @file The trace file name or NULL for the default name-<pid> set at
* config time
*/
-bool st_set_trace_file(const char *file)
+void st_set_trace_file(const char *file)
{
st_set_trace_file_enabled(false);
@@ -335,7 +335,6 @@ bool st_set_trace_file(const char *file)
}
st_set_trace_file_enabled(true);
- return true;
}
void st_print_trace_file_status(FILE *stream, int (*stream_printf)(FILE
*stream, const char *fmt, ...))
@@ -373,7 +372,7 @@ static GThread *trace_thread_create(GThreadFunc fn)
return thread;
}
-bool st_init(const char *file)
+bool st_init(void)
{
GThread *thread;
@@ -386,6 +385,5 @@ bool st_init(const char *file)
}
atexit(st_flush_trace_buffer);
- st_set_trace_file(file);
return true;
}
diff --git a/trace/simple.h b/trace/simple.h
index 6997996..8d1a32e 100644
--- a/trace/simple.h
+++ b/trace/simple.h
@@ -20,8 +20,8 @@
void st_print_trace_file_status(FILE *stream, fprintf_function stream_printf);
void st_set_trace_file_enabled(bool enable);
-bool st_set_trace_file(const char *file);
-bool st_init(const char *file);
+void st_set_trace_file(const char *file);
+bool st_init(void);
void st_flush_trace_buffer(void);
typedef struct {
diff --git a/vl.c b/vl.c
index 4df502c..b567ed9 100644
--- a/vl.c
+++ b/vl.c
@@ -2991,7 +2991,7 @@ int main(int argc, char **argv, char **envp)
bool userconfig = true;
const char *log_mask = NULL;
const char *log_file = NULL;
- const char *trace_file = NULL;
+ char *trace_file = NULL;
ram_addr_t maxram_size;
uint64_t ram_slots = 0;
FILE *vmstate_dump_file = NULL;
@@ -3908,7 +3908,10 @@ int main(int argc, char **argv, char **envp)
exit(1);
}
trace_init_events(qemu_opt_get(opts, "events"));
- trace_file = qemu_opt_get(opts, "file");
+ if (trace_file) {
+ g_free(trace_file);
+ }
+ trace_file = g_strdup(qemu_opt_get(opts, "file"));
qemu_opts_del(opts);
break;
}
@@ -4092,6 +4095,8 @@ int main(int argc, char **argv, char **envp)
exit(0);
}
+ trace_init_file(trace_file);
+
/* Open the logfile at this point and set the log mask if necessary.
*/
if (log_file) {
@@ -4109,7 +4114,7 @@ int main(int argc, char **argv, char **envp)
}
if (!is_daemonized()) {
- if (!trace_init_backends(trace_file)) {
+ if (!trace_init_backends()) {
exit(1);
}
}
@@ -4672,7 +4677,7 @@ int main(int argc, char **argv, char **envp)
os_setup_post();
if (is_daemonized()) {
- if (!trace_init_backends(trace_file)) {
+ if (!trace_init_backends()) {
exit(1);
}
}
--
2.5.0
- [Qemu-devel] [PULL 00/15] Tracing patches, Stefan Hajnoczi, 2015/11/10
- [Qemu-devel] [PULL 01/15] trace: fix make foo-timestamp rules, Stefan Hajnoczi, 2015/11/10
- [Qemu-devel] [PULL 03/15] trace: count number of enabled events, Stefan Hajnoczi, 2015/11/10
- [Qemu-devel] [PULL 02/15] trace: add make dependencies on tracetool source, Stefan Hajnoczi, 2015/11/10
- [Qemu-devel] [PULL 04/15] trace: track enabled events in a separate array, Stefan Hajnoczi, 2015/11/10
- [Qemu-devel] [PULL 05/15] trace: fix documentation, Stefan Hajnoczi, 2015/11/10
- [Qemu-devel] [PULL 07/15] trace: split trace_init_file out of trace_init_backends,
Stefan Hajnoczi <=
- [Qemu-devel] [PULL 06/15] trace: split trace_init_events out of trace_init_backends, Stefan Hajnoczi, 2015/11/10
- [Qemu-devel] [PULL 08/15] trace: no need to call trace_backend_init in different branches now, Stefan Hajnoczi, 2015/11/10
- [Qemu-devel] [PULL 09/15] trace: add "-trace enable=...", Stefan Hajnoczi, 2015/11/10
- [Qemu-devel] [PULL 10/15] trace: add "-trace help", Stefan Hajnoczi, 2015/11/10
- [Qemu-devel] [PULL 11/15] log: do not unnecessarily include qom/cpu.h, Stefan Hajnoczi, 2015/11/10
- [Qemu-devel] [PULL 12/15] log: move qemu-log.c into util/ directory, Stefan Hajnoczi, 2015/11/10
- [Qemu-devel] [PULL 14/15] trace: switch default backend to "log", Stefan Hajnoczi, 2015/11/10
- [Qemu-devel] [PULL 13/15] trace: convert stderr backend to log, Stefan Hajnoczi, 2015/11/10