1: #include <stdio.h>
2:
3: void __cyg_profile_func_enter(void *this_fn, void *call_site)
4: __attribute__((no_instrument_function));
5: void __cyg_profile_func_enter(void *this_fn, void *call_site) {
6: printf("Hello I am entering ");
7: } /* __cyg_profile_func_enter */
8: void __cyg_profile_func_exit(void *this_fn, void *call_site)
9: __attribute__((no_instrument_function));
10: void __cyg_profile_func_exit(void *this_fn, void *call_site) {
11: printf("Hello, I am exitint ");
12: } /* __cyg_profile_func_enter */
13:
main.c
1: #include <stdio.h>
2: #include "myfun.h"
3: void myStartupFun (void) __attribute__ ((constructor));
4: void myCleanupFun (void) __attribute__ ((destructor));
5: int foo() {
6: return 2;
7: }
8: int bar() {
9: return 1;
10: }
11: int main(int argc, char** argv) {
12: int i ,j;
13: i = foo();
14: j = bar();
15: printf("foo=%d bar=%d ", i, j);
16: return 0;
17: }
when you compile this file, please put the myFun.h in the same directory with main.c, and MUST with flag “-finstrument-functions”