51 lines
No EOL
1.9 KiB
C++
51 lines
No EOL
1.9 KiB
C++
#include <cstring>
|
|
#include <iostream>
|
|
|
|
void dummy1();
|
|
void dummy2();
|
|
|
|
int main() {
|
|
|
|
uintptr_t *prev1 = reinterpret_cast<uintptr_t *>(__builtin_frame_address(0));
|
|
uintptr_t *prev2 = static_cast<uintptr_t *>(__builtin_frame_address(0));
|
|
|
|
std::cout << "reinterpret:\t" << prev1 << "\nstatic:\t\t" << prev2 << std::endl;
|
|
|
|
std::cout << "Start:\t\t" << prev1 << std::endl;
|
|
#pragma clang diagnostic ignored "-Wframe-address"
|
|
uintptr_t *tmp = reinterpret_cast<uintptr_t *>(__builtin_frame_address(1));
|
|
std::cout << "Frame 1:\t" << tmp << "\t\tDiff:\t" << std::hex << "0x"<< tmp - prev1 << std::endl;
|
|
prev1 = tmp;
|
|
|
|
#pragma clang diagnostic ignored "-Wframe-address"
|
|
tmp = reinterpret_cast<uintptr_t *>(__builtin_frame_address(2));
|
|
std::cout << "Frame 2:\t" << tmp << "\tDiff:\t" << std::hex << "0x" << tmp - prev1 << std::endl;
|
|
prev1 = tmp;
|
|
|
|
// arg > 2 for __builtin_frame_address() results in segfault
|
|
// #pragma clang diagnostic ignored "-Wframe-address"
|
|
// tmp = reinterpret_cast<uintptr_t *>(__builtin_frame_address(3));
|
|
// std::cout << "Frame 3:\t" << tmp << "\tDiff:\t" << std::hex << "0x" << prev1 - tmp << std::endl;
|
|
|
|
dummy1();
|
|
|
|
return 0;
|
|
}
|
|
|
|
void dummy1() {
|
|
std::cout << "D1 SFrame:\t" << __builtin_frame_address(0);
|
|
#pragma clang diagnostic ignored "-Wframe-address"
|
|
std::cout << "\t\tPrev:\t" << __builtin_frame_address(1) << std::endl;
|
|
std::cout << "D1 RA:\t\t" << std::hex << __builtin_return_address(0) << std::endl;
|
|
dummy2();
|
|
}
|
|
|
|
void dummy2() {
|
|
std::cout << "Frame:\t\t" << __builtin_frame_address(0);
|
|
#pragma clang diagnostic ignored "-Wframe-address"
|
|
std::cout << "\t\tPrev:\t" << __builtin_frame_address(1) << std::endl;
|
|
void *ra = __builtin_return_address(0);
|
|
std::cout << "D2 RA:\t\t" << std::hex << ra << std::endl;
|
|
// gives same value as pure 'ra'
|
|
// std::cout << "D2 ERA:\t\t" << std::hex << __builtin_extract_return_addr(ra) << std::endl;
|
|
} |