[v2,2/2] trace: [bsd-user] Commandline arguments to control tracing

Commit Message

Lluís Vilanova June 22, 2016, 10:04 a.m. UTC

Signed-off-by: Lluís Vilanova <[e-mail]>
---
 bsd-user/main.c |   19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

Patch

diff --git a/bsd-user/main.c b/bsd-user/main.c
index 9f592be..542e50e 100644
--- a/bsd-user/main.c
+++ b/bsd-user/main.c
@@ -30,6 +30,7 @@ 
 #include "qemu/timer.h"
 #include "qemu/envlist.h"
 #include "exec/log.h"
+#include "trace/control.h"
 
 int singlestep;
 unsigned long mmap_min_addr;
@@ -687,6 +688,12 @@  static void usage(void)
            "-p pagesize       set the host page size to 'pagesize'\n"
            "-singlestep       always run in singlestep mode\n"
            "-strace           log system calls\n"
+           "-trace-enable name\n"
+           "                  enable tracing of specified event names (pass 'help' to show a list of events)\n"
+           "-trace-events eventsfile\n"
+           "                  enable tracing of specified event names (one name/pattern per line)\n"
+           "-trace-file tracefile\n"
+           "                  output trace file\n"
            "\n"
            "Environment variables:\n"
            "QEMU_STRACE       Print system calls and arguments similar to the\n"
@@ -735,6 +742,7 @@  int main(int argc, char **argv)
     int gdbstub_port = 0;
     char **target_environ, **wrk;
     envlist_t *envlist = NULL;
+    const char *trace_file = NULL;
     bsd_type = target_openbsd;
 
     if (argc <= 1)
@@ -840,6 +848,12 @@  int main(int argc, char **argv)
             singlestep = 1;
         } else if (!strcmp(r, "strace")) {
             do_strace = 1;
+        } else if (!strcmp(r, "trace-enable")) {
+            trace_enable_events(argv[optind++]);
+        } else if (!strcmp(r, "trace-events")) {
+            trace_init_events(argv[optind++]);
+        } else if (!strcmp(r, "trace-file")) {
+            trace_file = argv[optind++];
         } else
         {
             usage();
@@ -865,6 +879,11 @@  int main(int argc, char **argv)
     }
     filename = argv[optind];
 
+    if (!trace_init_backends()) {
+        exit(1);
+    }
+    trace_init_file(trace_file);
+
     /* Zero out regs */
     memset(regs, 0, sizeof(struct target_pt_regs));