Added vreplay with stdout

luprex/core/cpp/driver-common.cpp

@@ -470,9 +470,12 @@ public:
         cleanup_channels();
     }
 
-    int replay_logfile(const char *fn) {
+    int replay_logfile(const char *fn, bool verbose) {
         drv::ReplayPlayer player;
         player.open_logfile(fn);
+        if (verbose) {
+            player.enable_stdout();
+        }
         while (true) {
             drv::ReplayPlayer::Status st = player.step();
             if (st != drv::ReplayPlayer::ST_REPLAYING) {
@@ -493,17 +496,22 @@ public:
 
         // If argv contains "replay <filename>", do a replay,
         // and then skip everything else.
-        if ((argc >= 1) && (strcmp(argv[0], "replay") == 0)) {
+        if (argc >= 1) {
+            std::string cmd(argv[0]);
+            if ((cmd == "replay") || (cmd == "vreplay")) {
                 if (argc != 2) {
                     std::cerr << "usage: " << program << " replay <filename>" << std::endl;
-                exit(1);
+                    return 1;
+                }
+                return replay_logfile(argv[1], cmd == "vreplay");
             }
-            return replay_logfile(argv[1]);
         }
 
         // If argv contains "record <filename>", start recording,
         // and remove the "record <filename>" from argv.
-        if ((argc >= 1) && (strcmp(argv[0], "record") == 0)) {
+        if (argc >= 1) {
+            std::string cmd = argv[0];
+            if (cmd == "record") {
                 if (argc < 2) {
                     DrivenEngine::print_usage(std::cerr, program);
                     return 1;
@@ -515,6 +523,7 @@ public:
                 }
                 argc -= 2; argv += 2;
             }
+        }
 
         // Create the engine.
         if (argc < 1) {

luprex/core/cpp/driver-util.cpp

@@ -160,6 +160,7 @@ std::string_view rlog_string(std::ifstream &s, char *rlog_buf) {
 
 ReplayPlayer::ReplayPlayer() {
     status_ = ST_REPLAYING;
+    enable_stdout_ = false;
     buf_.reset(new char[RLOG_BUFSIZE]);
 }
 
@@ -344,6 +345,10 @@ void ReplayPlayer::drv_sent_outgoing() {
         set_status(ST_NONDERMINISTIC);
         return;
     }
+    if ((chid == 0) && (enable_stdout_)) {
+        std::string_view sub = data.substr(0, nbytes);
+        std::cout << sub;
+    }
     e_->drv_sent_outgoing(chid, nbytes);
 }
 

luprex/core/cpp/driver-util.hpp

@@ -96,6 +96,7 @@ private:
     Status status_;
     std::string logfn_;
     std::string engine_;
+    bool enable_stdout_;
     
     void set_status(Status e);
 
@@ -119,6 +120,15 @@ public:
     //
     bool open_logfile(const char *fn);
 
+    // Enable stdout.
+    //
+    // Normally, stdout is suppressed during replay.
+    // If you enable stdout, then the engine will print
+    // all the same messages it did when running in the
+    // first place.
+    //
+    void enable_stdout() { enable_stdout_ = true; }
+
     // Execute a single step from the replay log.
     //
     // Returns a status code, which is usually ST_REPLAYING.