how to get all invoked system API of a program

Hello everyone,


Suppose we have the source codes, how to get all invoked system API (like printf, open, etc.) other than program self-defined API? Are there any existing tools?

Either on Windows or on Linux platform is ok.


thanks in advance,
George

Try the nm command in linux:

Code:

---

itsme@itsme:~/C$ cat nmexample.c
#include <stdio.h>
#include <string.h>

void foo(void) { }

int main(void)
{
  char buf[BUFSIZ];

  strcpy(buf, "Hello, world!");
  puts(buf);
  printf("%s\n", buf);
  foo();

  return 0;
}

---

Code:

---

itsme@itsme:~/C$ nm -D nmexample
080484f8 R _IO_stdin_used
        w _Jv_RegisterClasses
        w __gmon_start__
        U __libc_start_main
        U printf
        U puts
        U strcpy
itsme@itsme:~/C$

---

Thank you itsme86!

Quote:

---

Originally Posted by itsme86

Try the nm command in linux:

Code:

---

itsme@itsme:~/C$ cat nmexample.c
#include <stdio.h>
#include <string.h>

void foo(void) { }

int main(void)
{
  char buf[BUFSIZ];

  strcpy(buf, "Hello, world!");
  puts(buf);
  printf("%s\n", buf);
  foo();

  return 0;
}

---

Code:

---

itsme@itsme:~/C$ nm -D nmexample
080484f8 R _IO_stdin_used
        w _Jv_RegisterClasses
        w __gmon_start__
        U __libc_start_main
        U printf
        U puts
        U strcpy
itsme@itsme:~/C$

---

---

Your reply makes senses. I have tried to use nm to analyze an executable file on Linux platform, using the -D option and it works good. I have also looked at the man page of -D option of Linux man page. It is explained as dynamic symbol analysis rather than normal symbols. What does it mean -- dynamic symbols? normal symbols?


regards,
George

It means it lists symbols that aren't resolved in the executable. Symbols that are linked at runtime from a library file.