[Qemu-devel] [Qemu-Devel][PATCH 3/3] Adding command line option to linux-user.

[vandersonmr <vandersonmr2@gmail.com>]

Added -execfreq to enable execution frequency counting and dump
all the TB's addresses and their execution frequency at the end
of the execution.

Signed-off-by: vandersonmr <vandersonmr2@gmail.com>
---
 linux-user/exit.c | 5 +++++
 linux-user/main.c | 7 +++++++
 2 files changed, 12 insertions(+)

diff --git a/linux-user/exit.c b/linux-user/exit.c
index bdda720553..0c6a2f2d5b 100644
--- a/linux-user/exit.c
+++ b/linux-user/exit.c
@@ -26,8 +26,13 @@
 extern void __gcov_dump(void);
 #endif
 
+extern bool enable_freq_count;
+
 void preexit_cleanup(CPUArchState *env, int code)
 {
+    if (enable_freq_count) {
+        tb_dump_all_exec_freq();
+    }
 #ifdef TARGET_GPROF
         _mcleanup();
 #endif
diff --git a/linux-user/main.c b/linux-user/main.c
index 1bf7155670..ece2d8bd8b 100644
--- a/linux-user/main.c
+++ b/linux-user/main.c
@@ -388,6 +388,11 @@ static void handle_arg_trace(const char *arg)
     trace_file = trace_opt_parse(arg);
 }
 
+static void handle_arg_execfreq(const char *arg)
+{
+    enable_freq_count = true;
+}
+
 struct qemu_argument {
     const char *argv;
     const char *env;
@@ -439,6 +444,8 @@ static const struct qemu_argument arg_table[] = {
      "",           "Seed for pseudo-random number generator"},
     {"trace",      "QEMU_TRACE",       true,  handle_arg_trace,
      "",           "[[enable=]<pattern>][,events=<file>][,file=<file>]"},
+    {"execfreq",   "QEMU_EXEC_FREQ",   false,  handle_arg_execfreq,
+     "",           "enable and dump TB's execution frequency counting"},
     {"version",    "QEMU_VERSION",     false, handle_arg_version,
      "",           "display version information and exit"},
     {NULL, NULL, false, NULL, NULL, NULL}
-- 
2.22.0