adds coverage plugin

src/plugin/cov.cpp

@@ -0,0 +1,32 @@
+#include <iss/plugin/cov.h>
+#include <iss/arch_if.h>
+#include <iostream>
+
+
+iss::plugin::cov::cov() {
+    std::cout << "Entering Constructor"<<std::endl;
+    output.open("output.txt");
+
+}
+
+iss::plugin::cov::~cov() {
+    std::cout << "Entering Destructor"<<std::endl;
+    output.close();
+
+
+}
+
+bool iss::plugin::cov::registration(const char *const version, vm_if& vm) {
+    instr_if = vm.get_arch()->get_instrumentation_if();
+    return true;
+}
+void iss::plugin::cov::callback(instr_info_t iinfo, const exec_info&) {
+//    if((instr_if->get_next_pc() - instr_if->get_pc() != 4) ||( instr_if->get_next_pc() - instr_if->get_pc() != 2)){
+//        std::cout << "jump from " << std::hex << instr_if->get_pc() << " to " << instr_if->get_next_pc()<< " after " << std::dec << counter <<" linear instructions" <<std::endl;
+//        counter = 0;
+//    }else {
+//        counter++;
+//    }
+
+    output<<std::hex << instr_if->get_pc() << std::endl;
+}