1 //===- Win32/Process.cpp - Win32 Process Implementation ------- -*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file provides the Win32 specific implementation of the Process class.
12 //===----------------------------------------------------------------------===//
14 #include "llvm/Support/Allocator.h"
15 #include "llvm/Support/ErrorHandling.h"
16 #include "llvm/Support/WindowsError.h"
19 // The Windows.h header must be after LLVM and standard headers.
20 #include "WindowsSupport.h"
28 #if (HAVE_LIBPSAPI != 1)
29 #error "libpsapi.a should be present"
31 #if (HAVE_LIBSHELL32 != 1)
32 #error "libshell32.a should be present"
35 #pragma comment(lib, "psapi.lib")
36 #pragma comment(lib, "shell32.lib")
39 //===----------------------------------------------------------------------===//
40 //=== WARNING: Implementation here must contain only Win32 specific code
41 //=== and must not be UNIX code
42 //===----------------------------------------------------------------------===//
45 // This ban should be lifted when MinGW 1.0+ has defined this value.
51 // This function retrieves the page size using GetNativeSystemInfo() and is
52 // present solely so it can be called once to initialize the self_process member
54 static unsigned computePageSize() {
55 // GetNativeSystemInfo() provides the physical page size which may differ
56 // from GetSystemInfo() in 32-bit applications running under WOW64.
58 GetNativeSystemInfo(&info);
59 // FIXME: FileOffset in MapViewOfFile() should be aligned to not dwPageSize,
60 // but dwAllocationGranularity.
61 return static_cast<unsigned>(info.dwPageSize);
64 unsigned Process::getPageSize() {
65 static unsigned Ret = computePageSize();
70 Process::GetMallocUsage()
77 while (_heapwalk(&hinfo) == _HEAPOK)
83 void Process::GetTimeUsage(TimePoint<> &elapsed, std::chrono::nanoseconds &user_time,
84 std::chrono::nanoseconds &sys_time) {
85 elapsed = std::chrono::system_clock::now();;
87 FILETIME ProcCreate, ProcExit, KernelTime, UserTime;
88 if (GetProcessTimes(GetCurrentProcess(), &ProcCreate, &ProcExit, &KernelTime,
92 user_time = toDuration(UserTime);
93 sys_time = toDuration(KernelTime);
96 // Some LLVM programs such as bugpoint produce core files as a normal part of
97 // their operation. To prevent the disk from filling up, this configuration
98 // item does what's necessary to prevent their generation.
99 void Process::PreventCoreFiles() {
100 // Windows does have the concept of core files, called minidumps. However,
101 // disabling minidumps for a particular application extends past the lifetime
102 // of that application, which is the incorrect behavior for this API.
103 // Additionally, the APIs require elevated privileges to disable and re-
104 // enable minidumps, which makes this untenable. For more information, see
105 // WerAddExcludedApplication and WerRemoveExcludedApplication (Vista and
108 // Windows also has modal pop-up message boxes. As this method is used by
109 // bugpoint, preventing these pop-ups is additionally important.
110 SetErrorMode(SEM_FAILCRITICALERRORS |
111 SEM_NOGPFAULTERRORBOX |
112 SEM_NOOPENFILEERRORBOX);
114 coreFilesPrevented = true;
117 /// Returns the environment variable \arg Name's value as a string encoded in
118 /// UTF-8. \arg Name is assumed to be in UTF-8 encoding.
119 Optional<std::string> Process::GetEnv(StringRef Name) {
120 // Convert the argument to UTF-16 to pass it to _wgetenv().
121 SmallVector<wchar_t, 128> NameUTF16;
122 if (windows::UTF8ToUTF16(Name, NameUTF16))
125 // Environment variable can be encoded in non-UTF8 encoding, and there's no
126 // way to know what the encoding is. The only reliable way to look up
127 // multibyte environment variable is to use GetEnvironmentVariableW().
128 SmallVector<wchar_t, MAX_PATH> Buf;
129 size_t Size = MAX_PATH;
132 SetLastError(NO_ERROR);
134 GetEnvironmentVariableW(NameUTF16.data(), Buf.data(), Buf.capacity());
135 if (Size == 0 && GetLastError() == ERROR_ENVVAR_NOT_FOUND)
138 // Try again with larger buffer.
139 } while (Size > Buf.capacity());
142 // Convert the result from UTF-16 to UTF-8.
143 SmallVector<char, MAX_PATH> Res;
144 if (windows::UTF16ToUTF8(Buf.data(), Size, Res))
146 return std::string(Res.data());
149 static void AllocateAndPush(const SmallVectorImpl<char> &S,
150 SmallVectorImpl<const char *> &Vector,
151 SpecificBumpPtrAllocator<char> &Allocator) {
152 char *Buffer = Allocator.Allocate(S.size() + 1);
153 ::memcpy(Buffer, S.data(), S.size());
154 Buffer[S.size()] = '\0';
155 Vector.push_back(Buffer);
158 /// Convert Arg from UTF-16 to UTF-8 and push it onto Args.
159 static std::error_code
160 ConvertAndPushArg(const wchar_t *Arg, SmallVectorImpl<const char *> &Args,
161 SpecificBumpPtrAllocator<char> &Allocator) {
162 SmallVector<char, MAX_PATH> ArgString;
163 if (std::error_code ec = windows::UTF16ToUTF8(Arg, wcslen(Arg), ArgString))
165 AllocateAndPush(ArgString, Args, Allocator);
166 return std::error_code();
169 /// \brief Perform wildcard expansion of Arg, or just push it into Args if it
170 /// doesn't have wildcards or doesn't match any files.
171 static std::error_code
172 WildcardExpand(const wchar_t *Arg, SmallVectorImpl<const char *> &Args,
173 SpecificBumpPtrAllocator<char> &Allocator) {
174 if (!wcspbrk(Arg, L"*?")) {
175 // Arg does not contain any wildcard characters. This is the common case.
176 return ConvertAndPushArg(Arg, Args, Allocator);
179 if (wcscmp(Arg, L"/?") == 0 || wcscmp(Arg, L"-?") == 0) {
180 // Don't wildcard expand /?. Always treat it as an option.
181 return ConvertAndPushArg(Arg, Args, Allocator);
184 // Extract any directory part of the argument.
185 SmallVector<char, MAX_PATH> Dir;
186 if (std::error_code ec = windows::UTF16ToUTF8(Arg, wcslen(Arg), Dir))
188 sys::path::remove_filename(Dir);
189 const int DirSize = Dir.size();
191 // Search for matching files.
192 // FIXME: This assumes the wildcard is only in the file name and not in the
193 // directory portion of the file path. For example, it doesn't handle
194 // "*\foo.c" nor "s?c\bar.cpp".
195 WIN32_FIND_DATAW FileData;
196 HANDLE FindHandle = FindFirstFileW(Arg, &FileData);
197 if (FindHandle == INVALID_HANDLE_VALUE) {
198 return ConvertAndPushArg(Arg, Args, Allocator);
203 SmallVector<char, MAX_PATH> FileName;
204 ec = windows::UTF16ToUTF8(FileData.cFileName, wcslen(FileData.cFileName),
209 // Append FileName to Dir, and remove it afterwards.
210 llvm::sys::path::append(Dir, StringRef(FileName.data(), FileName.size()));
211 AllocateAndPush(Dir, Args, Allocator);
213 } while (FindNextFileW(FindHandle, &FileData));
215 FindClose(FindHandle);
219 static std::error_code
220 ExpandShortFileName(const wchar_t *Arg, SmallVectorImpl<const char *> &Args,
221 SpecificBumpPtrAllocator<char> &Allocator) {
222 SmallVector<wchar_t, MAX_PATH> LongPath;
223 DWORD Length = GetLongPathNameW(Arg, LongPath.data(), LongPath.capacity());
225 return mapWindowsError(GetLastError());
226 if (Length > LongPath.capacity()) {
227 // We're not going to try to deal with paths longer than MAX_PATH, so we'll
228 // treat this as an error. GetLastError() returns ERROR_SUCCESS, which
229 // isn't useful, so we'll hardcode an appropriate error value.
230 return mapWindowsError(ERROR_INSUFFICIENT_BUFFER);
232 LongPath.set_size(Length);
233 return ConvertAndPushArg(LongPath.data(), Args, Allocator);
237 Process::GetArgumentVector(SmallVectorImpl<const char *> &Args,
238 ArrayRef<const char *>,
239 SpecificBumpPtrAllocator<char> &ArgAllocator) {
241 wchar_t **UnicodeCommandLine =
242 CommandLineToArgvW(GetCommandLineW(), &ArgCount);
243 if (!UnicodeCommandLine)
244 return mapWindowsError(::GetLastError());
246 Args.reserve(ArgCount);
249 // The first argument may contain just the name of the executable (e.g.,
250 // "clang") rather than the full path, so swap it with the full path.
251 wchar_t ModuleName[MAX_PATH];
252 int Length = ::GetModuleFileNameW(NULL, ModuleName, MAX_PATH);
253 if (0 < Length && Length < MAX_PATH)
254 UnicodeCommandLine[0] = ModuleName;
256 // If the first argument is a shortened (8.3) name (which is possible even
257 // if we got the module name), the driver will have trouble distinguishing it
258 // (e.g., clang.exe v. clang++.exe), so expand it now.
259 ec = ExpandShortFileName(UnicodeCommandLine[0], Args, ArgAllocator);
261 for (int i = 1; i < ArgCount && !ec; ++i) {
262 ec = WildcardExpand(UnicodeCommandLine[i], Args, ArgAllocator);
267 LocalFree(UnicodeCommandLine);
271 std::error_code Process::FixupStandardFileDescriptors() {
272 return std::error_code();
275 std::error_code Process::SafelyCloseFileDescriptor(int FD) {
277 return std::error_code(errno, std::generic_category());
278 return std::error_code();
281 bool Process::StandardInIsUserInput() {
282 return FileDescriptorIsDisplayed(0);
285 bool Process::StandardOutIsDisplayed() {
286 return FileDescriptorIsDisplayed(1);
289 bool Process::StandardErrIsDisplayed() {
290 return FileDescriptorIsDisplayed(2);
293 bool Process::FileDescriptorIsDisplayed(int fd) {
294 DWORD Mode; // Unused
295 return (GetConsoleMode((HANDLE)_get_osfhandle(fd), &Mode) != 0);
298 unsigned Process::StandardOutColumns() {
299 unsigned Columns = 0;
300 CONSOLE_SCREEN_BUFFER_INFO csbi;
301 if (GetConsoleScreenBufferInfo(GetStdHandle(STD_OUTPUT_HANDLE), &csbi))
302 Columns = csbi.dwSize.X;
306 unsigned Process::StandardErrColumns() {
307 unsigned Columns = 0;
308 CONSOLE_SCREEN_BUFFER_INFO csbi;
309 if (GetConsoleScreenBufferInfo(GetStdHandle(STD_ERROR_HANDLE), &csbi))
310 Columns = csbi.dwSize.X;
314 // The terminal always has colors.
315 bool Process::FileDescriptorHasColors(int fd) {
316 return FileDescriptorIsDisplayed(fd);
319 bool Process::StandardOutHasColors() {
320 return FileDescriptorHasColors(1);
323 bool Process::StandardErrHasColors() {
324 return FileDescriptorHasColors(2);
327 static bool UseANSI = false;
328 void Process::UseANSIEscapeCodes(bool enable) {
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");