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authorPrerna Saxena <prerna@linux.vnet.ibm.com>2010-08-09 11:48:32 +0100
committerAnthony Liguori <aliguori@us.ibm.com>2010-09-09 16:22:44 -0500
commitab6540d55e8d57609c1e0c18b40269b05e231ce7 (patch)
tree7e761d38b442099464d8ea2c2b82d7e25274db2e /vl.c
parentc5ceb523fa6fc168d3f51e306fee3def458e047e (diff)
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trace: Add trace file name command-line option
This patch adds an optional command line switch '-trace' to specify the filename to write traces to, when qemu starts. Eg, If compiled with the 'simple' trace backend, [temp@system]$ qemu -trace FILENAME IMAGE Allows the binary traces to be written to FILENAME instead of the option set at config-time. Signed-off-by: Prerna Saxena <prerna@linux.vnet.ibm.com> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Diffstat (limited to 'vl.c')
-rw-r--r--vl.c21
1 files changed, 21 insertions, 0 deletions
diff --git a/vl.c b/vl.c
index df11ab3..3f45aa9 100644
--- a/vl.c
+++ b/vl.c
@@ -47,6 +47,10 @@
#include <dirent.h>
#include <netdb.h>
#include <sys/select.h>
+#ifdef CONFIG_SIMPLE_TRACE
+#include "trace.h"
+#endif
+
#ifdef CONFIG_BSD
#include <sys/stat.h>
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
@@ -1823,6 +1827,9 @@ int main(int argc, char **argv, char **envp)
int show_vnc_port = 0;
int defconfig = 1;
+#ifdef CONFIG_SIMPLE_TRACE
+ const char *trace_file = NULL;
+#endif
atexit(qemu_run_exit_notifiers);
error_set_progname(argv[0]);
@@ -2595,6 +2602,14 @@ int main(int argc, char **argv, char **envp)
}
xen_mode = XEN_ATTACH;
break;
+#ifdef CONFIG_SIMPLE_TRACE
+ case QEMU_OPTION_trace:
+ opts = qemu_opts_parse(qemu_find_opts("trace"), optarg, 0);
+ if (opts) {
+ trace_file = qemu_opt_get(opts, "file");
+ }
+ break;
+#endif
case QEMU_OPTION_readconfig:
{
int ret = qemu_read_config_file(optarg);
@@ -2638,6 +2653,12 @@ int main(int argc, char **argv, char **envp)
data_dir = CONFIG_QEMU_DATADIR;
}
+#ifdef CONFIG_SIMPLE_TRACE
+ /*
+ * Set the trace file name, if specified.
+ */
+ st_set_trace_file(trace_file);
+#endif
/*
* Default to max_cpus = smp_cpus, in case the user doesn't
* specify a max_cpus value.