1 //===- Win32/Process.cpp - Win32 Process Implementation ------- -*- C++ -*-===//
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //===----------------------------------------------------------------------===//
9 // This file provides the Win32 specific implementation of the Process class.
11 //===----------------------------------------------------------------------===//
13 #include "llvm/Support/Allocator.h"
14 #include "llvm/Support/CommandLine.h"
15 #include "llvm/Support/ConvertUTF.h"
16 #include "llvm/Support/ErrorHandling.h"
17 #include "llvm/Support/StringSaver.h"
18 #include "llvm/Support/WindowsError.h"
21 // The Windows.h header must be after LLVM and standard headers.
22 #include "WindowsSupport.h"
29 #if !defined(__MINGW32__)
30 #pragma comment(lib, "psapi.lib")
31 #pragma comment(lib, "shell32.lib")
34 //===----------------------------------------------------------------------===//
35 //=== WARNING: Implementation here must contain only Win32 specific code
36 //=== and must not be UNIX code
37 //===----------------------------------------------------------------------===//
40 // This ban should be lifted when MinGW 1.0+ has defined this value.
46 // This function retrieves the page size using GetNativeSystemInfo() and is
47 // present solely so it can be called once to initialize the self_process member
49 static unsigned computePageSize() {
50 // GetNativeSystemInfo() provides the physical page size which may differ
51 // from GetSystemInfo() in 32-bit applications running under WOW64.
53 GetNativeSystemInfo(&info);
54 // FIXME: FileOffset in MapViewOfFile() should be aligned to not dwPageSize,
55 // but dwAllocationGranularity.
56 return static_cast<unsigned>(info.dwPageSize);
59 Expected<unsigned> Process::getPageSize() {
60 static unsigned Ret = computePageSize();
65 Process::GetMallocUsage()
72 while (_heapwalk(&hinfo) == _HEAPOK)
78 void Process::GetTimeUsage(TimePoint<> &elapsed, std::chrono::nanoseconds &user_time,
79 std::chrono::nanoseconds &sys_time) {
80 elapsed = std::chrono::system_clock::now();;
82 FILETIME ProcCreate, ProcExit, KernelTime, UserTime;
83 if (GetProcessTimes(GetCurrentProcess(), &ProcCreate, &ProcExit, &KernelTime,
87 user_time = toDuration(UserTime);
88 sys_time = toDuration(KernelTime);
91 // Some LLVM programs such as bugpoint produce core files as a normal part of
92 // their operation. To prevent the disk from filling up, this configuration
93 // item does what's necessary to prevent their generation.
94 void Process::PreventCoreFiles() {
95 // Windows does have the concept of core files, called minidumps. However,
96 // disabling minidumps for a particular application extends past the lifetime
97 // of that application, which is the incorrect behavior for this API.
98 // Additionally, the APIs require elevated privileges to disable and re-
99 // enable minidumps, which makes this untenable. For more information, see
100 // WerAddExcludedApplication and WerRemoveExcludedApplication (Vista and
103 // Windows also has modal pop-up message boxes. As this method is used by
104 // bugpoint, preventing these pop-ups is additionally important.
105 SetErrorMode(SEM_FAILCRITICALERRORS |
106 SEM_NOGPFAULTERRORBOX |
107 SEM_NOOPENFILEERRORBOX);
109 coreFilesPrevented = true;
112 /// Returns the environment variable \arg Name's value as a string encoded in
113 /// UTF-8. \arg Name is assumed to be in UTF-8 encoding.
114 Optional<std::string> Process::GetEnv(StringRef Name) {
115 // Convert the argument to UTF-16 to pass it to _wgetenv().
116 SmallVector<wchar_t, 128> NameUTF16;
117 if (windows::UTF8ToUTF16(Name, NameUTF16))
120 // Environment variable can be encoded in non-UTF8 encoding, and there's no
121 // way to know what the encoding is. The only reliable way to look up
122 // multibyte environment variable is to use GetEnvironmentVariableW().
123 SmallVector<wchar_t, MAX_PATH> Buf;
124 size_t Size = MAX_PATH;
127 SetLastError(NO_ERROR);
129 GetEnvironmentVariableW(NameUTF16.data(), Buf.data(), Buf.capacity());
130 if (Size == 0 && GetLastError() == ERROR_ENVVAR_NOT_FOUND)
133 // Try again with larger buffer.
134 } while (Size > Buf.capacity());
137 // Convert the result from UTF-16 to UTF-8.
138 SmallVector<char, MAX_PATH> Res;
139 if (windows::UTF16ToUTF8(Buf.data(), Size, Res))
141 return std::string(Res.data());
144 /// Perform wildcard expansion of Arg, or just push it into Args if it doesn't
145 /// have wildcards or doesn't match any files.
146 static std::error_code WildcardExpand(StringRef Arg,
147 SmallVectorImpl<const char *> &Args,
148 StringSaver &Saver) {
151 // Don't expand Arg if it does not contain any wildcard characters. This is
152 // the common case. Also don't wildcard expand /?. Always treat it as an
154 if (Arg.find_first_of("*?") == StringRef::npos || Arg == "/?" ||
156 Args.push_back(Arg.data());
160 // Convert back to UTF-16 so we can call FindFirstFileW.
161 SmallVector<wchar_t, MAX_PATH> ArgW;
162 EC = windows::UTF8ToUTF16(Arg, ArgW);
166 // Search for matching files.
167 // FIXME: This assumes the wildcard is only in the file name and not in the
168 // directory portion of the file path. For example, it doesn't handle
169 // "*\foo.c" nor "s?c\bar.cpp".
170 WIN32_FIND_DATAW FileData;
171 HANDLE FindHandle = FindFirstFileW(ArgW.data(), &FileData);
172 if (FindHandle == INVALID_HANDLE_VALUE) {
173 Args.push_back(Arg.data());
177 // Extract any directory part of the argument.
178 SmallString<MAX_PATH> Dir = Arg;
179 sys::path::remove_filename(Dir);
180 const int DirSize = Dir.size();
183 SmallString<MAX_PATH> FileName;
184 EC = windows::UTF16ToUTF8(FileData.cFileName, wcslen(FileData.cFileName),
189 // Append FileName to Dir, and remove it afterwards.
190 llvm::sys::path::append(Dir, FileName);
191 Args.push_back(Saver.save(StringRef(Dir)).data());
193 } while (FindNextFileW(FindHandle, &FileData));
195 FindClose(FindHandle);
199 static std::error_code GetExecutableName(SmallVectorImpl<char> &Filename) {
200 // The first argument may contain just the name of the executable (e.g.,
201 // "clang") rather than the full path, so swap it with the full path.
202 wchar_t ModuleName[MAX_PATH];
203 size_t Length = ::GetModuleFileNameW(NULL, ModuleName, MAX_PATH);
204 if (Length == 0 || Length == MAX_PATH) {
205 return mapWindowsError(GetLastError());
208 // If the first argument is a shortened (8.3) name (which is possible even
209 // if we got the module name), the driver will have trouble distinguishing it
210 // (e.g., clang.exe v. clang++.exe), so expand it now.
211 Length = GetLongPathNameW(ModuleName, ModuleName, MAX_PATH);
213 return mapWindowsError(GetLastError());
214 if (Length > MAX_PATH) {
215 // We're not going to try to deal with paths longer than MAX_PATH, so we'll
216 // treat this as an error. GetLastError() returns ERROR_SUCCESS, which
217 // isn't useful, so we'll hardcode an appropriate error value.
218 return mapWindowsError(ERROR_INSUFFICIENT_BUFFER);
221 std::error_code EC = windows::UTF16ToUTF8(ModuleName, Length, Filename);
225 StringRef Base = sys::path::filename(Filename.data());
226 Filename.assign(Base.begin(), Base.end());
227 return std::error_code();
231 windows::GetCommandLineArguments(SmallVectorImpl<const char *> &Args,
232 BumpPtrAllocator &Alloc) {
233 const wchar_t *CmdW = GetCommandLineW();
236 SmallString<MAX_PATH> Cmd;
237 EC = windows::UTF16ToUTF8(CmdW, wcslen(CmdW), Cmd);
241 SmallVector<const char *, 20> TmpArgs;
242 StringSaver Saver(Alloc);
243 cl::TokenizeWindowsCommandLine(Cmd, Saver, TmpArgs, /*MarkEOLs=*/false);
245 for (const char *Arg : TmpArgs) {
246 EC = WildcardExpand(Arg, Args, Saver);
251 SmallVector<char, MAX_PATH> Arg0(Args[0], Args[0] + strlen(Args[0]));
252 SmallVector<char, MAX_PATH> Filename;
253 sys::path::remove_filename(Arg0);
254 EC = GetExecutableName(Filename);
257 sys::path::append(Arg0, Filename);
258 Args[0] = Saver.save(Arg0).data();
259 return std::error_code();
262 std::error_code Process::FixupStandardFileDescriptors() {
263 return std::error_code();
266 std::error_code Process::SafelyCloseFileDescriptor(int FD) {
268 return std::error_code(errno, std::generic_category());
269 return std::error_code();
272 bool Process::StandardInIsUserInput() {
273 return FileDescriptorIsDisplayed(0);
276 bool Process::StandardOutIsDisplayed() {
277 return FileDescriptorIsDisplayed(1);
280 bool Process::StandardErrIsDisplayed() {
281 return FileDescriptorIsDisplayed(2);
284 bool Process::FileDescriptorIsDisplayed(int fd) {
285 DWORD Mode; // Unused
286 return (GetConsoleMode((HANDLE)_get_osfhandle(fd), &Mode) != 0);
289 unsigned Process::StandardOutColumns() {
290 unsigned Columns = 0;
291 CONSOLE_SCREEN_BUFFER_INFO csbi;
292 if (GetConsoleScreenBufferInfo(GetStdHandle(STD_OUTPUT_HANDLE), &csbi))
293 Columns = csbi.dwSize.X;
297 unsigned Process::StandardErrColumns() {
298 unsigned Columns = 0;
299 CONSOLE_SCREEN_BUFFER_INFO csbi;
300 if (GetConsoleScreenBufferInfo(GetStdHandle(STD_ERROR_HANDLE), &csbi))
301 Columns = csbi.dwSize.X;
305 // The terminal always has colors.
306 bool Process::FileDescriptorHasColors(int fd) {
307 return FileDescriptorIsDisplayed(fd);
310 bool Process::StandardOutHasColors() {
311 return FileDescriptorHasColors(1);
314 bool Process::StandardErrHasColors() {
315 return FileDescriptorHasColors(2);
318 static bool UseANSI = false;
319 void Process::UseANSIEscapeCodes(bool enable) {
320 #if defined(ENABLE_VIRTUAL_TERMINAL_PROCESSING)
322 HANDLE Console = GetStdHandle(STD_OUTPUT_HANDLE);
324 GetConsoleMode(Console, &Mode);
325 Mode |= ENABLE_VIRTUAL_TERMINAL_PROCESSING;
326 SetConsoleMode(Console, Mode);
339 :defaultColor(GetCurrentColor()) {}
340 static unsigned GetCurrentColor() {
341 CONSOLE_SCREEN_BUFFER_INFO csbi;
342 if (GetConsoleScreenBufferInfo(GetStdHandle(STD_OUTPUT_HANDLE), &csbi))
343 return csbi.wAttributes;
346 WORD operator()() const { return defaultColor; }
349 DefaultColors defaultColors;
351 WORD fg_color(WORD color) {
352 return color & (FOREGROUND_BLUE | FOREGROUND_GREEN |
353 FOREGROUND_INTENSITY | FOREGROUND_RED);
356 WORD bg_color(WORD color) {
357 return color & (BACKGROUND_BLUE | BACKGROUND_GREEN |
358 BACKGROUND_INTENSITY | BACKGROUND_RED);
362 bool Process::ColorNeedsFlush() {
366 const char *Process::OutputBold(bool bg) {
367 if (UseANSI) return "\033[1m";
369 WORD colors = DefaultColors::GetCurrentColor();
371 colors |= BACKGROUND_INTENSITY;
373 colors |= FOREGROUND_INTENSITY;
374 SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), colors);
378 const char *Process::OutputColor(char code, bool bold, bool bg) {
379 if (UseANSI) return colorcodes[bg?1:0][bold?1:0][code&7];
381 WORD current = DefaultColors::GetCurrentColor();
384 colors = ((code&1) ? BACKGROUND_RED : 0) |
385 ((code&2) ? BACKGROUND_GREEN : 0 ) |
386 ((code&4) ? BACKGROUND_BLUE : 0);
388 colors |= BACKGROUND_INTENSITY;
389 colors |= fg_color(current);
391 colors = ((code&1) ? FOREGROUND_RED : 0) |
392 ((code&2) ? FOREGROUND_GREEN : 0 ) |
393 ((code&4) ? FOREGROUND_BLUE : 0);
395 colors |= FOREGROUND_INTENSITY;
396 colors |= bg_color(current);
398 SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), colors);
402 static WORD GetConsoleTextAttribute(HANDLE hConsoleOutput) {
403 CONSOLE_SCREEN_BUFFER_INFO info;
404 GetConsoleScreenBufferInfo(GetStdHandle(STD_OUTPUT_HANDLE), &info);
405 return info.wAttributes;
408 const char *Process::OutputReverse() {
409 if (UseANSI) return "\033[7m";
411 const WORD attributes
412 = GetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE));
414 const WORD foreground_mask = FOREGROUND_BLUE | FOREGROUND_GREEN |
415 FOREGROUND_RED | FOREGROUND_INTENSITY;
416 const WORD background_mask = BACKGROUND_BLUE | BACKGROUND_GREEN |
417 BACKGROUND_RED | BACKGROUND_INTENSITY;
418 const WORD color_mask = foreground_mask | background_mask;
420 WORD new_attributes =
421 ((attributes & FOREGROUND_BLUE )?BACKGROUND_BLUE :0) |
422 ((attributes & FOREGROUND_GREEN )?BACKGROUND_GREEN :0) |
423 ((attributes & FOREGROUND_RED )?BACKGROUND_RED :0) |
424 ((attributes & FOREGROUND_INTENSITY)?BACKGROUND_INTENSITY:0) |
425 ((attributes & BACKGROUND_BLUE )?FOREGROUND_BLUE :0) |
426 ((attributes & BACKGROUND_GREEN )?FOREGROUND_GREEN :0) |
427 ((attributes & BACKGROUND_RED )?FOREGROUND_RED :0) |
428 ((attributes & BACKGROUND_INTENSITY)?FOREGROUND_INTENSITY:0) |
430 new_attributes = (attributes & ~color_mask) | (new_attributes & color_mask);
432 SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), new_attributes);
436 const char *Process::ResetColor() {
437 if (UseANSI) return "\033[0m";
438 SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), defaultColors());
442 // Include GetLastError() in a fatal error message.
443 static void ReportLastErrorFatal(const char *Msg) {
445 MakeErrMsg(&ErrMsg, Msg);
446 report_fatal_error(ErrMsg);
449 unsigned Process::GetRandomNumber() {
451 if (!::CryptAcquireContextW(&HCPC, NULL, NULL, PROV_RSA_FULL,
452 CRYPT_VERIFYCONTEXT))
453 ReportLastErrorFatal("Could not acquire a cryptographic context");
455 ScopedCryptContext CryptoProvider(HCPC);
457 if (!::CryptGenRandom(CryptoProvider, sizeof(Ret),
458 reinterpret_cast<BYTE *>(&Ret)))
459 ReportLastErrorFatal("Could not generate a random number");
463 typedef NTSTATUS(WINAPI* RtlGetVersionPtr)(PRTL_OSVERSIONINFOW);
464 #define STATUS_SUCCESS ((NTSTATUS)0x00000000L)
466 llvm::VersionTuple llvm::GetWindowsOSVersion() {
467 HMODULE hMod = ::GetModuleHandleW(L"ntdll.dll");
469 auto getVer = (RtlGetVersionPtr)::GetProcAddress(hMod, "RtlGetVersion");
471 RTL_OSVERSIONINFOEXW info{};
472 info.dwOSVersionInfoSize = sizeof(info);
473 if (getVer((PRTL_OSVERSIONINFOW)&info) == STATUS_SUCCESS) {
474 return llvm::VersionTuple(info.dwMajorVersion, info.dwMinorVersion, 0,
479 return llvm::VersionTuple(0, 0, 0, 0);
482 bool llvm::RunningWindows8OrGreater() {
483 // Windows 8 is version 6.2, service pack 0.
484 return GetWindowsOSVersion() >= llvm::VersionTuple(6, 2, 0, 0);