mirror of
https://github.com/boykopovar/AnyPS5.git
synced 2026-11-08 13:50:20 +00:00
Alex WhitehouseandClaude Opus 5.5
ac08050a7d
Discovery failures now fall back to the plain end-of-file extension. Sparse-marking and EOF failures still map to errors. An IAT-patched regression covers the three truncate paths. Co-Authored-By: Claude Opus 5.5 <[email protected]>
251 lines
13 KiB
C++
251 lines
13 KiB
C++
#include "prx/libkernel/include/Api.hpp"
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#include "prx/libc/include/Api.hpp"
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#include "prx/libc/include/general/VabiMacros.hpp"
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#include <cstdint>
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#include <cstdio>
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#include <cstdlib>
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#include <cstring>
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#ifdef _WIN32
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#define WIN32_LEAN_AND_MEAN
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#include <windows.h>
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#include <algorithm>
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#include <array>
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#include <fcntl.h>
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#include <io.h>
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#endif
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namespace {
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constexpr int ReadOnly = 0;
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constexpr int ReadWrite = 2;
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constexpr int Create = 0x200;
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constexpr std::int64_t Length = 64ll * 1024 * 1024;
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constexpr char FileName[] = "anyps5_truncate_extend_file";
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void Cleanup() {
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unlink_nid_postfix(FileName);
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}
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void Check(bool condition, const char* what, int line) {
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if (condition) return;
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std::fflush(stdout);
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std::fprintf(stderr, "line %d: %s (errno %d)\n", line, what, *__error_nid_postfix());
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Cleanup();
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std::abort();
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}
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#define Require(condition, what) Check((condition), (what), __LINE__)
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#ifdef _WIN32
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bool SupportsSparseFiles() {
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const auto handle = CreateFileW(L".", 0, FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
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nullptr, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, nullptr);
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Require(handle != INVALID_HANDLE_VALUE, "open test directory failed");
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DWORD flags = 0;
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const bool queried = GetVolumeInformationByHandleW(handle, nullptr, 0, nullptr, nullptr, &flags, nullptr, 0);
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const DWORD error = GetLastError();
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CloseHandle(handle);
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if (!queried) {
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std::printf("query test volume failed (Windows error %lu); allocation assertions skipped\n", error);
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return false;
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}
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return (flags & FILE_SUPPORTS_SPARSE_FILES) != 0;
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}
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unsigned int failedVolumeQueries = 0;
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BOOL WINAPI FailVolumeQuery(HANDLE, LPWSTR, DWORD, LPDWORD, LPDWORD, LPDWORD, LPWSTR, DWORD) {
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++failedVolumeQueries;
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SetLastError(ERROR_INVALID_FUNCTION);
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return FALSE;
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}
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class VolumeQueryPatch {
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public:
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VolumeQueryPatch() {
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const auto module = GetModuleHandleW(L"libkernel.prx");
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Require(module != nullptr, "find loaded libkernel failed");
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const auto base = reinterpret_cast<unsigned char*>(module);
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const auto dos = reinterpret_cast<const IMAGE_DOS_HEADER*>(base);
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Require(dos->e_magic == IMAGE_DOS_SIGNATURE, "libkernel DOS signature invalid");
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const auto nt = reinterpret_cast<const IMAGE_NT_HEADERS*>(base + dos->e_lfanew);
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Require(nt->Signature == IMAGE_NT_SIGNATURE, "libkernel PE signature invalid");
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const auto importRva = nt->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_IMPORT].VirtualAddress;
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Require(importRva != 0, "libkernel imports missing");
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const auto realQuery = reinterpret_cast<ULONG_PTR>(&GetVolumeInformationByHandleW);
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for (auto import = reinterpret_cast<const IMAGE_IMPORT_DESCRIPTOR*>(base + importRva); import->Name != 0; ++import) {
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for (auto thunk = reinterpret_cast<IMAGE_THUNK_DATA*>(base + import->FirstThunk); thunk->u1.Function != 0; ++thunk) {
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if (thunk->u1.Function != realQuery) continue;
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Require(slot == nullptr, "multiple libkernel volume query IAT entries found");
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slot = &thunk->u1.Function;
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}
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}
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Require(slot != nullptr, "libkernel volume query IAT entry not found");
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original = *slot;
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replace(reinterpret_cast<ULONG_PTR>(&FailVolumeQuery));
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}
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~VolumeQueryPatch() {
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replace(original);
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}
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VolumeQueryPatch(const VolumeQueryPatch&) = delete;
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VolumeQueryPatch& operator=(const VolumeQueryPatch&) = delete;
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private:
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void replace(ULONG_PTR value) {
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DWORD protection = 0;
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Require(VirtualProtect(slot, sizeof(*slot), PAGE_READWRITE, &protection), "make volume query IAT entry writable failed");
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*slot = value;
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DWORD previous = 0;
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Require(VirtualProtect(slot, sizeof(*slot), protection, &previous), "restore volume query IAT protection failed");
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}
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ULONG_PTR* slot = nullptr;
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ULONG_PTR original = 0;
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};
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void CheckSparseAllocation(bool supported) {
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if (!supported) return;
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DWORD high = 0;
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SetLastError(ERROR_SUCCESS);
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const DWORD low = GetCompressedFileSizeW(L"anyps5_truncate_extend_file", &high);
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Require(low != INVALID_FILE_SIZE || GetLastError() == ERROR_SUCCESS, "query allocation failed");
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const auto allocated = (static_cast<std::uint64_t>(high) << 32) | low;
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std::printf("64 MiB extension allocated %llu bytes\n", static_cast<unsigned long long>(allocated));
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Require(allocated < static_cast<std::uint64_t>(Length) / 16, "extension must leave a sparse hole, not reserve the new range");
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const DWORD attributes = GetFileAttributesW(L"anyps5_truncate_extend_file");
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Require(attributes != INVALID_FILE_ATTRIBUTES && (attributes & FILE_ATTRIBUTE_SPARSE_FILE) != 0,
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"extended file must have FILE_ATTRIBUTE_SPARSE_FILE");
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}
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void CheckSparseExtension(int mode, bool supported, bool queryFails = false) {
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Cleanup();
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std::printf("sparse extension path: %s\n", mode == 0 ? "descriptor" : mode == 1 ? "append-only reopened writer" : "path");
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const auto queriesBefore = failedVolumeQueries;
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int descriptor = open_nid_postfix(FileName, Create | ReadWrite, 0644);
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Require(descriptor >= 0, "open sparse test file failed");
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Require(write_nid_postfix(descriptor, "head", 4) == 4, "write sparse test prefix failed");
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if (mode == 1) {
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Require(close_nid_postfix(descriptor) == 0, "close before append-only reopen failed");
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const auto handle = CreateFileW(L"anyps5_truncate_extend_file", FILE_GENERIC_READ | (FILE_GENERIC_WRITE & ~FILE_WRITE_DATA),
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FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, nullptr, OPEN_EXISTING, 0, nullptr);
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Require(handle != INVALID_HANDLE_VALUE, "open append-only handle failed");
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descriptor = _open_osfhandle(reinterpret_cast<std::intptr_t>(handle), _O_RDWR | _O_APPEND | _O_BINARY);
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Require(descriptor >= 0, "wrap append-only handle failed");
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}
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const DWORD originalAttributes = GetFileAttributesW(L"anyps5_truncate_extend_file");
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Require(originalAttributes != INVALID_FILE_ATTRIBUTES, "query initial attributes failed");
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Require(ftruncate_nid_postfix(descriptor, 4) == 0, "non-extending truncate failed");
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Require(ftruncate_nid_postfix(descriptor, 2) == 0, "initial shrink failed");
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Require((GetFileAttributesW(L"anyps5_truncate_extend_file") & FILE_ATTRIBUTE_SPARSE_FILE) ==
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(originalAttributes & FILE_ATTRIBUTE_SPARSE_FILE), "shrinking and non-extending calls must not mark the file sparse");
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const int checker = open_nid_postfix(FileName, ReadWrite, 0);
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Require(checker >= 0, "open verification descriptor failed");
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Require(sceKernelPwrite(checker, "ad", 2, 2) == 2, "restore prefix failed");
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Require(lseek_nid_postfix(descriptor, 137, 0) == 137, "set sparse test cursor failed");
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const auto resize = [&](std::int64_t length) {
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return mode == 2 ? truncate_nid_postfix(FileName, length) : ftruncate_nid_postfix(descriptor, length);
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};
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for (int round = 0; round < 2; ++round) {
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Require(resize(Length) == 0, "sparse extension failed");
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Require(lseek_nid_postfix(descriptor, 0, 1) == 137, "extension changed the file position");
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Require(lseek_nid_postfix(checker, 0, 2) == Length, "sparse extension has wrong size");
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CheckSparseAllocation(supported);
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if (queryFails) {
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const DWORD attributes = GetFileAttributesW(L"anyps5_truncate_extend_file");
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Require(attributes != INVALID_FILE_ATTRIBUTES && (attributes & FILE_ATTRIBUTE_SPARSE_FILE) == 0,
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"unknown volume capabilities must not mark the file sparse");
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}
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char prefix[4]{};
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const int prefixSize = round == 0 ? 4 : 2;
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Require(pread_nid_postfix(checker, prefix, prefixSize, 0) == prefixSize && std::memcmp(prefix, "head", prefixSize) == 0,
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"sparse extension changed original bytes");
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std::array<char, 65536> buffer{};
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for (std::int64_t offset = prefixSize; offset < Length;) {
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const auto count = static_cast<std::size_t>((std::min)(Length - offset, static_cast<std::int64_t>(buffer.size())));
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buffer.fill(1);
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Require(pread_nid_postfix(checker, buffer.data(), count, offset) == static_cast<std::int64_t>(count), "read sparse hole failed");
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Require(std::all_of(buffer.begin(), buffer.begin() + count, [](char byte) { return byte == 0; }), "sparse hole must read entirely as zeros");
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offset += count;
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}
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Require(sceKernelPwrite(checker, "tail", 4, Length - 4) == 4, "write near sparse end failed");
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char tail[4]{};
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Require(pread_nid_postfix(checker, tail, 4, Length - 4) == 4 && std::memcmp(tail, "tail", 4) == 0, "write near sparse end landed incorrectly");
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Require(lseek_nid_postfix(descriptor, 0, 1) == 137, "verification changed the original cursor");
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Require(resize(2) == 0, "sparse shrink failed");
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Require(lseek_nid_postfix(descriptor, 0, 1) == 137, "shrink changed the file position");
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Require(lseek_nid_postfix(checker, 0, 2) == 2, "sparse shrink has wrong size");
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}
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Require(close_nid_postfix(checker) == 0, "close verification descriptor failed");
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Require(close_nid_postfix(descriptor) == 0, "close sparse descriptor failed");
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if (queryFails) {
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std::printf("failed capability query regression: %u calls\n", failedVolumeQueries - queriesBefore);
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Require(failedVolumeQueries > queriesBefore, "libkernel must call the failing volume capability query");
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}
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Cleanup();
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}
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#endif
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std::uint64_t BytesWritten() {
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#ifdef _WIN32
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IO_COUNTERS counters{};
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return GetProcessIoCounters(GetCurrentProcess(), &counters) ? counters.WriteTransferCount : 0;
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#else
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return 0;
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#endif
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}
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}
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int main() {
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#ifdef _WIN32
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const bool sparseSupported = SupportsSparseFiles();
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std::printf("test volume sparse support: %s\n", sparseSupported ? "yes" : "no; allocation assertions skipped");
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for (int mode = 0; mode < 3; ++mode) CheckSparseExtension(mode, sparseSupported);
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{
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const VolumeQueryPatch patch;
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for (int mode = 0; mode < 3; ++mode) CheckSparseExtension(mode, false, true);
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}
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#endif
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Cleanup();
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const int descriptor = open_nid_postfix(FileName, Create | ReadWrite, 0644);
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Require(descriptor >= 0, "open failed");
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Require(write_nid_postfix(descriptor, "head", 4) == 4, "write failed");
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const std::uint64_t before = BytesWritten();
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Require(ftruncate_nid_postfix(descriptor, Length) == 0, "ftruncate to 64 MiB failed");
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const std::uint64_t written = BytesWritten() - before;
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std::printf("extending by 64 MiB wrote %llu bytes\n", static_cast<unsigned long long>(written));
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#ifdef _WIN32
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Require(written < static_cast<std::uint64_t>(Length) / 16, "extending a file must not write its new length as zero bytes: the process wrote about as many bytes as the new length");
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#endif
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Require(lseek_nid_postfix(descriptor, 0, 2) == Length, "the extended file has the wrong size");
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Require(lseek_nid_postfix(descriptor, 0, 1) == Length, "ftruncate must not move the file offset");
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char head[4] = {};
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char tail[8] = {1, 1, 1, 1, 1, 1, 1, 1};
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Require(pread_nid_postfix(descriptor, head, 4, 0) == 4 && std::memcmp(head, "head", 4) == 0, "extending must keep the existing bytes");
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Require(pread_nid_postfix(descriptor, tail, 8, Length - 8) == 8 && tail[0] == 0 && tail[7] == 0, "the extension must read as zero bytes");
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Require(ftruncate_nid_postfix(descriptor, 2) == 0, "shrinking failed");
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Require(lseek_nid_postfix(descriptor, 0, 2) == 2, "the shrunk file has the wrong size");
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Require(ftruncate_nid_postfix(descriptor, -1) == -1 && *__error_nid_postfix() == 22, "a negative length must fail with EINVAL (22)");
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Require(close_nid_postfix(descriptor) == 0, "close failed");
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const int readOnly = open_nid_postfix(FileName, ReadOnly, 0);
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Require(readOnly >= 0, "reopen failed");
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Require(ftruncate_nid_postfix(readOnly, 8) == -1 && *__error_nid_postfix() == 22, "ftruncate on a read-only descriptor must fail with EINVAL (22)");
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Require(close_nid_postfix(readOnly) == 0, "close failed");
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Require(truncate_nid_postfix(FileName, Length) == 0, "truncate to 64 MiB failed");
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const int check = open_nid_postfix(FileName, ReadOnly, 0);
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Require(check >= 0 && lseek_nid_postfix(check, 0, 2) == Length, "truncate by path left the wrong size");
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Require(close_nid_postfix(check) == 0, "close failed");
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Require(truncate_nid_postfix(FileName, -1) == -1 && *__error_nid_postfix() == 22, "truncate by path with negative length must fail with EINVAL (22)");
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Require(truncate_nid_postfix(FileName, -100) == -1 && *__error_nid_postfix() == 22, "truncate by path with negative length must fail with EINVAL (22)");
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Cleanup();
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return 0;
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}
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