C，你的函数过程全被我看见了！

#if FUNC_RECORD_USE    #define FUNC_RECORD()  printf("Enter function  \n", __FUNCTION__)#else    #define FUNC_RECORD()#endif
void func_example(void){    FUNC_RECORD();    // ...}

void __cyg_profile_func_enter (void *this_fn, void *call_site);void __cyg_profile_func_exit  (void *this_fn, void *call_site);

#include 
int add(int a, int b){    return a+b;}
int max(int a, int b){    return a>b? a:b;}
void __attribute__((no_instrument_function)) __cyg_profile_func_enter(void *this, void *call){    printf(" this: %p, call: %p\n", this, call);} void __attribute__((no_instrument_function)) __cyg_profile_func_exit(void *this, void *call){    printf("  this: %p, call: %p\n", this, call);}
int main(void){    printf("max=%d\n", max(add(123,321),456));    return 0;}

$ ./main this: 0x100401184, call: 0x7ffc95ee80c1 this: 0x100401080, call: 0x1004011b9  this: 0x100401080, call: 0x1004011b9 this: 0x1004010cf, call: 0x1004011c5  this: 0x1004010cf, call: 0x1004011c5max=456  this: 0x100401184, call: 0x7ffc95ee80c1

$ addr2line -e main -a 0x100401080 -fps0x0000000100401080: add at main.c:4

 this: main, call: ?? this: add, call: main  this: add, call: add this: max, call: main  this: max, call: mainmax=456  this: main, call: ??