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trace: split trace_init_events out of trace_init_backends 

This is cleaner and has two advantages.  First, it improves error
reporting with -daemonize.  Second, multiple "-trace events" options
now cumulate.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Denis V. Lunev <den@openvz.org>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Message-id: 1452174932-28657-3-git-send-email-den@openvz.org
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Paolo Bonzini 2016-01-07 16:55:23 +03:00 committed by Stefan Hajnoczi
parent 52449a314e
commit 45bd0b41bd
4 changed files with 19 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
qemu-io.c
View File

@ -435,7 +435,7 @@ int main(int argc, char **argv)
} }
break; break;
case 'T': case 'T':
if (!trace_init_backends(optarg, NULL)) { if (!trace_init_backends(optarg)) {
exit(1); /* error message will have been printed */ exit(1); /* error message will have been printed */
} }
break; break;

5
trace/control.c
View File

@ -88,7 +88,7 @@ TraceEvent *trace_event_pattern(const char *pat, TraceEvent *ev)
return NULL; return NULL;
} }
static void trace_init_events(const char *fname) void trace_init_events(const char *fname)
{ {
Location loc; Location loc;
FILE *fp; FILE *fp;
@ -145,7 +145,7 @@ static void trace_init_events(const char *fname)
loc_pop(&loc); loc_pop(&loc);
} }
bool trace_init_backends(const char *events, const char *file) bool trace_init_backends(const char *file)
{ {
#ifdef CONFIG_TRACE_SIMPLE #ifdef CONFIG_TRACE_SIMPLE
if (!st_init(file)) { if (!st_init(file)) {
@ -167,6 +167,5 @@ bool trace_init_backends(const char *events, const char *file)
} }
#endif #endif
trace_init_events(events);
return true; return true;
} }

15
trace/control.h
View File

@ -150,8 +150,6 @@ static void trace_event_set_state_dynamic(TraceEvent *ev, bool state);
/** /**
* trace_init_backends: * trace_init_backends:
* @events: Name of file with events to be enabled at startup; may be NULL.
* Corresponds to commandline option "-trace events=...".
* @file: Name of trace output file; may be NULL. * @file: Name of trace output file; may be NULL.
* Corresponds to commandline option "-trace file=...". * Corresponds to commandline option "-trace file=...".
* *
@ -159,7 +157,18 @@ static void trace_event_set_state_dynamic(TraceEvent *ev, bool state);
* *
* Returns: Whether the backends could be successfully initialized. * Returns: Whether the backends could be successfully initialized.
*/ */
bool trace_init_backends(const char *events, const char *file); bool trace_init_backends(const char *file);
/**
* trace_init_events:
* @events: Name of file with events to be enabled at startup; may be NULL.
* Corresponds to commandline option "-trace events=...".
*
* Read the list of enabled tracing events.
*
* Returns: Whether the backends could be successfully initialized.
*/
void trace_init_events(const char *file);
#include "trace/control-internal.h" #include "trace/control-internal.h"

8
vl.c
View File

@ -2988,7 +2988,6 @@ int main(int argc, char **argv, char **envp)
bool userconfig = true; bool userconfig = true;
const char *log_mask = NULL; const char *log_mask = NULL;
const char *log_file = NULL; const char *log_file = NULL;
const char *trace_events = NULL;
const char *trace_file = NULL; const char *trace_file = NULL;
ram_addr_t maxram_size; ram_addr_t maxram_size;
uint64_t ram_slots = 0; uint64_t ram_slots = 0;
@ -3905,8 +3904,9 @@ int main(int argc, char **argv, char **envp)
if (!opts) { if (!opts) {
exit(1); exit(1);
} }
trace_events = qemu_opt_get(opts, "events"); trace_init_events(qemu_opt_get(opts, "events"));
trace_file = qemu_opt_get(opts, "file"); trace_file = qemu_opt_get(opts, "file");
qemu_opts_del(opts);
break; break;
} }
case QEMU_OPTION_readconfig: case QEMU_OPTION_readconfig:
@ -4106,7 +4106,7 @@ int main(int argc, char **argv, char **envp)
} }
if (!is_daemonized()) { if (!is_daemonized()) {
if (!trace_init_backends(trace_events, trace_file)) { if (!trace_init_backends(trace_file)) {
exit(1); exit(1);
} }
} }
@ -4653,7 +4653,7 @@ int main(int argc, char **argv, char **envp)
os_setup_post(); os_setup_post();
if (is_daemonized()) { if (is_daemonized()) {
if (!trace_init_backends(trace_events, trace_file)) { if (!trace_init_backends(trace_file)) {
exit(1); exit(1);
} }
} }