#ifdef CPPTRACE_UNWIND_WITH_EXECINFO

#include "unwind/unwind.hpp"

#include "utils/common.hpp"

#include "utils/utils.hpp"

#include <algorithm>

#include <climits>

#include <cstddef>

#include <vector>

#include <execinfo.h>

namespace cpptrace {

namespace detail {

CPPTRACE_FORCE_NO_INLINE

std::vector<frame_ptr> capture_frames(std::size_t skip, std::size_t max_depth) {

skip++;

std::vector<void*> addrs(skip + std::min(hard_max_frames, max_depth), nullptr);

// thread safe

const int n_frames = backtrace(addrs.data(), static_cast<int>(addrs.size()));

// I hate the copy here but it's the only way that isn't UB

std::vector<frame_ptr> frames(n_frames - skip, 0);

for(int i = skip; i < n_frames; i++) {

// On x86/x64/arm, as far as I can tell, the frame return address is always one after the call

// So we just decrement to get the pc back inside the `call` / `bl`

// This is done with _Unwind too but conditionally based on info from _Unwind_GetIPInfo.

frames[i - skip] = reinterpret_cast<frame_ptr>(addrs[i]) - 1;

}

return frames;

}

CPPTRACE_FORCE_NO_INLINE

std::size_t safe_capture_frames(frame_ptr*, std::size_t, std::size_t, std::size_t) {

// Can't safe trace with execinfo

return 0;

}

bool has_safe_unwind() {

return false;

}

}

}

#endif