#include <stdio.h>
#include <elf.h>


extern Elf64_Dyn _DYNAMIC[];
static long long gdb_base_address = 0x555555554000;
volatile int dynamic_section_cnt = 0;
const char *address_to_name(void *fn)
{
    static Elf64_Sym *sym_table = 0;
    static const char *string_sec = 0;
    char *base;
    if (sym_table == 0) {
        for (int i = 0;  ; ++ i) {
            if (_DYNAMIC[i].d_tag == DT_NULL)
                break;
            if (_DYNAMIC[i].d_tag == DT_SYMTAB)
                sym_table = (Elf64_Sym *)_DYNAMIC[i].d_un.d_ptr;
            else if (_DYNAMIC[i].d_tag == DT_STRTAB)
                string_sec = (const char*)_DYNAMIC[i].d_un.d_ptr;
        }
    }
    for (Elf64_Sym *it = sym_table;
        (char*)it < (char*)sym_table + sizeof(Elf64_Sym) * dynamic_section_cnt;
        ++ it) {
        if (fn == (char*)it->st_value + gdb_base_address)
            return string_sec + it->st_name;
    }
    return 0;
}
void __cyg_profile_func_enter (void *this_fn, void *call_site)
{
    fprintf(stderr, "b\t%s\n", address_to_name(this_fn));
}
void __cyg_profile_func_exit  (void *this_fn, void *call_site)
{
    fprintf(stderr, "e\t%s\n", address_to_name(this_fn));
}