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test(libc): require a stable guest hostname 

AI-assisted: yes. Verify AnyPS5 rather than the native PC hostname. Cover buffer capacities, guard bytes, maximum size_t capacity, null queries, success errno and thread-local isolation. The old implementation fails this regression; the final fixed tree passes the complete Windows build and five repeated runs each of guest_hostname and guest_errors on main 5edae3536. Linux and title tests of this new revision are pending.
This commit is contained in:
QRMOE 2026-10-10 16:32:37 +02:00 committed by Hannah Lyons
parent 8f32b6eca0
commit 01072bfe97
1 changed files with 15 additions and 17 deletions
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32
core/libs/tests/GuestHostname.cpp
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@ -3,14 +3,10 @@
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <string>
#include <limits>
#include <string_view>
#include <thread>
#include <vector>
#ifdef _WIN32
#include <windows.h>
#else
#include <unistd.h>
#endif
extern "C" {
int APS5_VABI gethostname_nid_postfix(char*, std::size_t);
@ -26,15 +22,7 @@ static void Require(bool condition, int line) {
#define Check(value) Require((value), __LINE__)
int main() {
std::array<char, 1024> native{};
#ifdef _WIN32
DWORD size = native.size();
Check(GetComputerNameExA(ComputerNameDnsHostname, native.data(), &size));
#else
Check(::gethostname(native.data(), native.size()) == 0);
#endif
const std::string expected = native.data();
Check(!expected.empty());
constexpr std::string_view expected = "AnyPS5";
for (std::size_t length = 0; length <= expected.size() + 2; ++length) {
std::vector<char> buffer(length + 2, '#');
*__error_nid_postfix() = 71;
@ -45,17 +33,27 @@ int main() {
Check(std::memcmp(buffer.data() + 1, expected.data(), length) == 0);
} else {
Check(result == 0 && *__error_nid_postfix() == 71);
Check(std::strcmp(buffer.data() + 1, expected.c_str()) == 0);
Check(std::strcmp(buffer.data() + 1, expected.data()) == 0);
for (std::size_t index = expected.size() + 2; index < buffer.size(); ++index) Check(buffer[index] == '#');
}
}
std::array<char, expected.size() + 3> oversized;
oversized.fill('#');
*__error_nid_postfix() = 71;
Check(gethostname_nid_postfix(oversized.data() + 1, std::numeric_limits<std::size_t>::max()) == 0);
Check(*__error_nid_postfix() == 71);
Check(std::strcmp(oversized.data() + 1, expected.data()) == 0);
Check(oversized.front() == '#' && oversized.back() == '#');
*__error_nid_postfix() = 22;
Check(gethostname_nid_postfix(nullptr, 0) == 0 && *__error_nid_postfix() == 22);
Check(gethostname_nid_postfix(nullptr, 1024) == 0 && *__error_nid_postfix() == 22);
std::thread worker([] {
std::thread worker([expected] {
char byte = '#';
*__error_nid_postfix() = 0;
Check(gethostname_nid_postfix(&byte, 0) == -1 && *__error_nid_postfix() == 63 && byte == '#');
std::array<char, expected.size() + 1> name{};
Check(gethostname_nid_postfix(name.data(), name.size()) == 0);
Check(std::strcmp(name.data(), expected.data()) == 0 && *__error_nid_postfix() == 63);
});
worker.join();
Check(*__error_nid_postfix() == 22);