callstack added

ml_profiler.cpp

@@ -2,9 +2,10 @@
 #include "ml_profiler.h"
 
 #include <iostream>
+#include <algorithm>
+// for linux gcc
 #include <iomanip>
 #include <numeric>
-#include <algorithm>
 
 
 using namespace std::chrono;
@@ -15,6 +16,8 @@ void MlPerfMon::turnOn() {
 }
 
 void MlPerfMon::add_method_call(const std::string &method) {
+    call_stack.push_back(method);
+
     if (perfOn) {
         auto search = calls_counter.find(method);
         if (search != calls_counter.end()) {
@@ -25,6 +28,25 @@ void MlPerfMon::add_method_call(const std::string &method) {
     }
 }
 
+void MlPerfMon::end_method_call() {
+    if (!call_stack.empty()){
+        call_stack.pop_back();
+    }    
+}
+
+std::string MlPerfMon::callstack() const {
+    std::string cs {"call stack:\n"};
+
+    int cnt = 0;
+    for (auto it = call_stack.rbegin(); it != call_stack.rend() && cnt < call_stack_max_methods; ++it, ++cnt)
+        cs.append( std::string(*it) + "\n");    // << std::endl;
+
+    if (call_stack.size() > call_stack_max_methods)
+        cs.append("next " + std::to_string(call_stack.size() - call_stack_max_methods) + " entries skipped..\n");
+
+    return cs.append("\n");
+}
+
 void MlPerfMon::print_results() {
     if (perfOn) {
         std::chrono::time_point<std::chrono::high_resolution_clock> end_time = std::chrono::high_resolution_clock::now();