Disassembling Hello World program in IDA

Question

I've de-compiled in IDA 7.0 (freeware version) such a simple c program (compiled in the Microsoft Visual Studio Community 2019):

#include <stdio.h>
#include <string.h >

char* sayHello(char* resultStr, char* addedStr) {
  strcat_s(resultStr, strlen(resultStr)+strlen(addedStr)+1, addedStr);
  return resultStr;
}

int main() {
  char str_in_1[100] = "Hello"; 
  char str_in_2[] = " World!";

  printf ("%s", sayHello(str_in_1, str_in_2));
}

Now i can't find the string sayHello (function name) either in the Functions window nor in the IDA View-A. How to find out w

Answer 1

Default VS compilation options do not enable debugging information generation so all function names are removed from the final executable (they're not required for execution). You need to build with debug info on and ensure that the PDB file is available when you open the exe in IDA.