commit 23d15e860b33819ad76092fbb32577542fe0c44d
author Lluís <xscript@gmx.net> Wed Aug 31 20:31:31 2011 +0200
committer Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Thu Sep 01 10:34:54 2011 +0100
tree 20c99fb621ab3c063c60029e69c8df744c6be0eb
parent 31965ae27bc11e90674be12584bb201b83df5aef

trace: add "-trace events" argument to control initial state

The "-trace events" argument can be used to provide a file with a list of trace
event names that will be enabled prior to starting execution, thus providing
early tracing.

This saves the user from manually toggling event states through the monitor
interface or whichever backend-specific interface.

Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>

vl.c

diff --git a/vl.c b/vl.c
index 60322b6..c6dc689 100644
--- a/vl.c
+++ b/vl.c
@@ -2137,6 +2137,7 @@
         .realloc = realloc_and_trace,
         .free = free_and_trace,
     };
+    const char *trace_events = NULL;
     const char *trace_file = NULL;
 
     atexit(qemu_run_exit_notifiers);
@@ -2934,6 +2935,7 @@
                 if (!opts) {
                     exit(1);
                 }
+                trace_events = qemu_opt_get(opts, "events");
                 trace_file = qemu_opt_get(opts, "file");
                 break;
             }
@@ -2994,7 +2996,7 @@
         set_cpu_log(log_mask);
     }
 
-    if (!trace_backend_init(trace_file)) {
+    if (!trace_backend_init(trace_events, trace_file)) {
         exit(1);
     }