ContextOutOfBoundsTest.cpp

// SPDX-License-Identifier: LGPL-3.0-or-later
// Copyright © 2022 Florian Fischer
#include <array>
#include <cstdint>
#include <cstdlib>
#include <iostream>

#include "Runtime.hpp"

static auto recur(uintptr_t depth, int val) -> int {
	if (depth == UINTPTR_MAX) return val;

	constexpr size_t stack_user_size = 1024;
	std::array<int, stack_user_size> stack_user;
	for (int& i : stack_user) {
		// NOLINTNEXTLINE(cert-msc32-c,cert-msc51-cpp)
		i = rand();
	}

	int res = recur(depth + 1, stack_user[stack_user_size - 1]);

	for (int i : stack_user) {
		res += i;
	}
	return res;
}

void emperTest() {
	// This test should exit(EXIT_SUCCESS) if EMPER successfully
	// detected a stack guard-page hit.
	Runtime::setGuardPageTouchCausesExitSuccess();

	int res = recur(0, 0);

	// This should never return a result.
	std::cerr << "ERROR: Got result: " << res;

	// This should never be reached, instead the guard page should have been hit.
	exit(EXIT_FAILURE);
}