trace: add gem5 instruction event

trace/events.h

@@ -42,6 +42,21 @@ class event {
   virtual void dump(std::ostream &out) = 0;
 };
 
+class EHostInstr : public event {
+ public:
+  uint64_t pc;
+
+  EHostInstr(uint64_t ts_, uint64_t pc_) : event(ts_), pc(pc_) {
+  }
+
+  virtual ~EHostInstr() {
+  }
+
+  virtual void dump(std::ostream &out) {
+    out << ts << ": H.INSTR pc=" << std::hex << pc << std::dec << std::endl;
+  }
+};
+
 class EHostCall : public event {
  public:
   const std::string &fun;

trace/gem5.cc

@@ -52,6 +52,8 @@ void gem5_parser::process_msg(uint64_t ts, char *comp_name,
     if (!p.consume_hex(addr) || p.consume_char('.'))
       return;
 
+    yield(std::make_shared<EHostInstr>(ts, addr));
+
     if (const std::string *s = syms.lookup(addr)) {
       yield(std::make_shared<EHostCall>(ts, *s));
     }

trace/process.cc

@@ -81,7 +81,10 @@ void Printer(coro_t::pull_type &source) {
   uint64_t ts_off = 0;
   for (auto ev: source) {
     std::shared_ptr<EHostCall> hc;
-    if ((hc = std::dynamic_pointer_cast<EHostCall>(ev)) &&
+    std::shared_ptr<EHostInstr> hi;
+    if ((hi = std::dynamic_pointer_cast<EHostInstr>(ev))) {
+      continue;
+    } else if ((hc = std::dynamic_pointer_cast<EHostCall>(ev)) &&
         strcmp(ev->source->label, "C") &&
         hc->fun == "__sys_sendto") {
       std::cout << "---------- REQ START:" << ev->ts << std::endl;