forked from OSchip/llvm-project
453 lines
14 KiB
C++
453 lines
14 KiB
C++
//===- Win32/Process.cpp - Win32 Process Implementation ------- -*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file provides the Win32 specific implementation of the Process class.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Support/Allocator.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/WindowsError.h"
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#include <malloc.h>
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// The Windows.h header must be after LLVM and standard headers.
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#include "WindowsSupport.h"
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#include <direct.h>
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#include <io.h>
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#include <psapi.h>
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#include <shellapi.h>
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#if !defined(__MINGW32__)
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#pragma comment(lib, "psapi.lib")
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#pragma comment(lib, "shell32.lib")
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#endif
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//===----------------------------------------------------------------------===//
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//=== WARNING: Implementation here must contain only Win32 specific code
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//=== and must not be UNIX code
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//===----------------------------------------------------------------------===//
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#ifdef __MINGW32__
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// This ban should be lifted when MinGW 1.0+ has defined this value.
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# define _HEAPOK (-2)
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#endif
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using namespace llvm;
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// This function retrieves the page size using GetNativeSystemInfo() and is
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// present solely so it can be called once to initialize the self_process member
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// below.
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static unsigned computePageSize() {
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// GetNativeSystemInfo() provides the physical page size which may differ
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// from GetSystemInfo() in 32-bit applications running under WOW64.
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SYSTEM_INFO info;
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GetNativeSystemInfo(&info);
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// FIXME: FileOffset in MapViewOfFile() should be aligned to not dwPageSize,
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// but dwAllocationGranularity.
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return static_cast<unsigned>(info.dwPageSize);
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}
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unsigned Process::getPageSize() {
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static unsigned Ret = computePageSize();
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return Ret;
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}
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size_t
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Process::GetMallocUsage()
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{
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_HEAPINFO hinfo;
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hinfo._pentry = NULL;
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size_t size = 0;
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while (_heapwalk(&hinfo) == _HEAPOK)
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size += hinfo._size;
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return size;
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}
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void Process::GetTimeUsage(TimePoint<> &elapsed, std::chrono::nanoseconds &user_time,
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std::chrono::nanoseconds &sys_time) {
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elapsed = std::chrono::system_clock::now();;
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FILETIME ProcCreate, ProcExit, KernelTime, UserTime;
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if (GetProcessTimes(GetCurrentProcess(), &ProcCreate, &ProcExit, &KernelTime,
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&UserTime) == 0)
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return;
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user_time = toDuration(UserTime);
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sys_time = toDuration(KernelTime);
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}
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// Some LLVM programs such as bugpoint produce core files as a normal part of
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// their operation. To prevent the disk from filling up, this configuration
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// item does what's necessary to prevent their generation.
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void Process::PreventCoreFiles() {
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// Windows does have the concept of core files, called minidumps. However,
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// disabling minidumps for a particular application extends past the lifetime
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// of that application, which is the incorrect behavior for this API.
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// Additionally, the APIs require elevated privileges to disable and re-
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// enable minidumps, which makes this untenable. For more information, see
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// WerAddExcludedApplication and WerRemoveExcludedApplication (Vista and
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// later).
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//
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// Windows also has modal pop-up message boxes. As this method is used by
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// bugpoint, preventing these pop-ups is additionally important.
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SetErrorMode(SEM_FAILCRITICALERRORS |
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SEM_NOGPFAULTERRORBOX |
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SEM_NOOPENFILEERRORBOX);
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coreFilesPrevented = true;
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}
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/// Returns the environment variable \arg Name's value as a string encoded in
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/// UTF-8. \arg Name is assumed to be in UTF-8 encoding.
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Optional<std::string> Process::GetEnv(StringRef Name) {
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// Convert the argument to UTF-16 to pass it to _wgetenv().
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SmallVector<wchar_t, 128> NameUTF16;
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if (windows::UTF8ToUTF16(Name, NameUTF16))
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return None;
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// Environment variable can be encoded in non-UTF8 encoding, and there's no
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// way to know what the encoding is. The only reliable way to look up
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// multibyte environment variable is to use GetEnvironmentVariableW().
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SmallVector<wchar_t, MAX_PATH> Buf;
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size_t Size = MAX_PATH;
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do {
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Buf.reserve(Size);
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SetLastError(NO_ERROR);
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Size =
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GetEnvironmentVariableW(NameUTF16.data(), Buf.data(), Buf.capacity());
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if (Size == 0 && GetLastError() == ERROR_ENVVAR_NOT_FOUND)
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return None;
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// Try again with larger buffer.
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} while (Size > Buf.capacity());
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Buf.set_size(Size);
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// Convert the result from UTF-16 to UTF-8.
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SmallVector<char, MAX_PATH> Res;
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if (windows::UTF16ToUTF8(Buf.data(), Size, Res))
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return None;
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return std::string(Res.data());
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}
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static const char *AllocateString(const SmallVectorImpl<char> &S,
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BumpPtrAllocator &Alloc) {
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char *Buf = reinterpret_cast<char *>(Alloc.Allocate(S.size() + 1, 1));
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::memcpy(Buf, S.data(), S.size());
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Buf[S.size()] = '\0';
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return Buf;
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}
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/// Convert Arg from UTF-16 to UTF-8 and push it onto Args.
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static std::error_code ConvertAndPushArg(const wchar_t *Arg,
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SmallVectorImpl<const char *> &Args,
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BumpPtrAllocator &Alloc) {
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SmallVector<char, MAX_PATH> ArgString;
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if (std::error_code ec = windows::UTF16ToUTF8(Arg, wcslen(Arg), ArgString))
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return ec;
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Args.push_back(AllocateString(ArgString, Alloc));
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return std::error_code();
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}
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/// Perform wildcard expansion of Arg, or just push it into Args if it
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/// doesn't have wildcards or doesn't match any files.
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static std::error_code WildcardExpand(const wchar_t *Arg,
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SmallVectorImpl<const char *> &Args,
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BumpPtrAllocator &Alloc) {
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if (!wcspbrk(Arg, L"*?")) {
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// Arg does not contain any wildcard characters. This is the common case.
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return ConvertAndPushArg(Arg, Args, Alloc);
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}
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if (wcscmp(Arg, L"/?") == 0 || wcscmp(Arg, L"-?") == 0) {
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// Don't wildcard expand /?. Always treat it as an option.
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return ConvertAndPushArg(Arg, Args, Alloc);
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}
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// Extract any directory part of the argument.
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SmallVector<char, MAX_PATH> Dir;
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if (std::error_code ec = windows::UTF16ToUTF8(Arg, wcslen(Arg), Dir))
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return ec;
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sys::path::remove_filename(Dir);
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const int DirSize = Dir.size();
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// Search for matching files.
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// FIXME: This assumes the wildcard is only in the file name and not in the
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// directory portion of the file path. For example, it doesn't handle
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// "*\foo.c" nor "s?c\bar.cpp".
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WIN32_FIND_DATAW FileData;
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HANDLE FindHandle = FindFirstFileW(Arg, &FileData);
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if (FindHandle == INVALID_HANDLE_VALUE) {
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return ConvertAndPushArg(Arg, Args, Alloc);
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}
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std::error_code ec;
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do {
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SmallVector<char, MAX_PATH> FileName;
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ec = windows::UTF16ToUTF8(FileData.cFileName, wcslen(FileData.cFileName),
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FileName);
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if (ec)
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break;
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// Append FileName to Dir, and remove it afterwards.
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llvm::sys::path::append(Dir, StringRef(FileName.data(), FileName.size()));
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Args.push_back(AllocateString(Dir, Alloc));
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Dir.resize(DirSize);
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} while (FindNextFileW(FindHandle, &FileData));
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FindClose(FindHandle);
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return ec;
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}
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static std::error_code ExpandShortFileName(const wchar_t *Arg,
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SmallVectorImpl<const char *> &Args,
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BumpPtrAllocator &Alloc) {
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SmallVector<wchar_t, MAX_PATH> LongPath;
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DWORD Length = GetLongPathNameW(Arg, LongPath.data(), LongPath.capacity());
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if (Length == 0)
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return mapWindowsError(GetLastError());
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if (Length > LongPath.capacity()) {
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// We're not going to try to deal with paths longer than MAX_PATH, so we'll
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// treat this as an error. GetLastError() returns ERROR_SUCCESS, which
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// isn't useful, so we'll hardcode an appropriate error value.
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return mapWindowsError(ERROR_INSUFFICIENT_BUFFER);
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}
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LongPath.set_size(Length);
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return ConvertAndPushArg(LongPath.data(), Args, Alloc);
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}
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std::error_code
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windows::GetCommandLineArguments(SmallVectorImpl<const char *> &Args,
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BumpPtrAllocator &Alloc) {
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int ArgCount;
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wchar_t **UnicodeCommandLine =
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CommandLineToArgvW(GetCommandLineW(), &ArgCount);
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if (!UnicodeCommandLine)
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return mapWindowsError(::GetLastError());
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Args.reserve(ArgCount);
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std::error_code ec;
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// The first argument may contain just the name of the executable (e.g.,
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// "clang") rather than the full path, so swap it with the full path.
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wchar_t ModuleName[MAX_PATH];
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int Length = ::GetModuleFileNameW(NULL, ModuleName, MAX_PATH);
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if (0 < Length && Length < MAX_PATH)
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UnicodeCommandLine[0] = ModuleName;
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// If the first argument is a shortened (8.3) name (which is possible even
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// if we got the module name), the driver will have trouble distinguishing it
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// (e.g., clang.exe v. clang++.exe), so expand it now.
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ec = ExpandShortFileName(UnicodeCommandLine[0], Args, Alloc);
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for (int i = 1; i < ArgCount && !ec; ++i) {
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ec = WildcardExpand(UnicodeCommandLine[i], Args, Alloc);
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if (ec)
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break;
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}
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LocalFree(UnicodeCommandLine);
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return ec;
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}
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std::error_code Process::FixupStandardFileDescriptors() {
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return std::error_code();
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}
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std::error_code Process::SafelyCloseFileDescriptor(int FD) {
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if (::close(FD) < 0)
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return std::error_code(errno, std::generic_category());
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return std::error_code();
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}
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bool Process::StandardInIsUserInput() {
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return FileDescriptorIsDisplayed(0);
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}
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bool Process::StandardOutIsDisplayed() {
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return FileDescriptorIsDisplayed(1);
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}
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bool Process::StandardErrIsDisplayed() {
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return FileDescriptorIsDisplayed(2);
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}
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bool Process::FileDescriptorIsDisplayed(int fd) {
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DWORD Mode; // Unused
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return (GetConsoleMode((HANDLE)_get_osfhandle(fd), &Mode) != 0);
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}
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unsigned Process::StandardOutColumns() {
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unsigned Columns = 0;
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CONSOLE_SCREEN_BUFFER_INFO csbi;
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if (GetConsoleScreenBufferInfo(GetStdHandle(STD_OUTPUT_HANDLE), &csbi))
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Columns = csbi.dwSize.X;
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return Columns;
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}
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unsigned Process::StandardErrColumns() {
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unsigned Columns = 0;
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CONSOLE_SCREEN_BUFFER_INFO csbi;
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if (GetConsoleScreenBufferInfo(GetStdHandle(STD_ERROR_HANDLE), &csbi))
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Columns = csbi.dwSize.X;
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return Columns;
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}
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// The terminal always has colors.
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bool Process::FileDescriptorHasColors(int fd) {
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return FileDescriptorIsDisplayed(fd);
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}
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bool Process::StandardOutHasColors() {
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return FileDescriptorHasColors(1);
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}
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bool Process::StandardErrHasColors() {
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return FileDescriptorHasColors(2);
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}
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static bool UseANSI = false;
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void Process::UseANSIEscapeCodes(bool enable) {
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UseANSI = enable;
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}
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namespace {
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class DefaultColors
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{
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private:
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WORD defaultColor;
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public:
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DefaultColors()
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:defaultColor(GetCurrentColor()) {}
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static unsigned GetCurrentColor() {
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CONSOLE_SCREEN_BUFFER_INFO csbi;
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if (GetConsoleScreenBufferInfo(GetStdHandle(STD_OUTPUT_HANDLE), &csbi))
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return csbi.wAttributes;
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return 0;
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}
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WORD operator()() const { return defaultColor; }
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};
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DefaultColors defaultColors;
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WORD fg_color(WORD color) {
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return color & (FOREGROUND_BLUE | FOREGROUND_GREEN |
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FOREGROUND_INTENSITY | FOREGROUND_RED);
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}
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WORD bg_color(WORD color) {
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return color & (BACKGROUND_BLUE | BACKGROUND_GREEN |
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BACKGROUND_INTENSITY | BACKGROUND_RED);
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}
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}
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bool Process::ColorNeedsFlush() {
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return !UseANSI;
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}
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const char *Process::OutputBold(bool bg) {
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if (UseANSI) return "\033[1m";
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WORD colors = DefaultColors::GetCurrentColor();
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if (bg)
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colors |= BACKGROUND_INTENSITY;
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else
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colors |= FOREGROUND_INTENSITY;
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SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), colors);
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return 0;
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}
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const char *Process::OutputColor(char code, bool bold, bool bg) {
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if (UseANSI) return colorcodes[bg?1:0][bold?1:0][code&7];
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WORD current = DefaultColors::GetCurrentColor();
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WORD colors;
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if (bg) {
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colors = ((code&1) ? BACKGROUND_RED : 0) |
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((code&2) ? BACKGROUND_GREEN : 0 ) |
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((code&4) ? BACKGROUND_BLUE : 0);
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if (bold)
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colors |= BACKGROUND_INTENSITY;
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colors |= fg_color(current);
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} else {
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colors = ((code&1) ? FOREGROUND_RED : 0) |
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((code&2) ? FOREGROUND_GREEN : 0 ) |
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((code&4) ? FOREGROUND_BLUE : 0);
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if (bold)
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colors |= FOREGROUND_INTENSITY;
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colors |= bg_color(current);
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}
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SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), colors);
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return 0;
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}
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static WORD GetConsoleTextAttribute(HANDLE hConsoleOutput) {
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CONSOLE_SCREEN_BUFFER_INFO info;
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GetConsoleScreenBufferInfo(GetStdHandle(STD_OUTPUT_HANDLE), &info);
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return info.wAttributes;
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}
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const char *Process::OutputReverse() {
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if (UseANSI) return "\033[7m";
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const WORD attributes
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= GetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE));
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const WORD foreground_mask = FOREGROUND_BLUE | FOREGROUND_GREEN |
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FOREGROUND_RED | FOREGROUND_INTENSITY;
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const WORD background_mask = BACKGROUND_BLUE | BACKGROUND_GREEN |
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BACKGROUND_RED | BACKGROUND_INTENSITY;
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const WORD color_mask = foreground_mask | background_mask;
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WORD new_attributes =
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((attributes & FOREGROUND_BLUE )?BACKGROUND_BLUE :0) |
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((attributes & FOREGROUND_GREEN )?BACKGROUND_GREEN :0) |
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((attributes & FOREGROUND_RED )?BACKGROUND_RED :0) |
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((attributes & FOREGROUND_INTENSITY)?BACKGROUND_INTENSITY:0) |
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((attributes & BACKGROUND_BLUE )?FOREGROUND_BLUE :0) |
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((attributes & BACKGROUND_GREEN )?FOREGROUND_GREEN :0) |
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((attributes & BACKGROUND_RED )?FOREGROUND_RED :0) |
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((attributes & BACKGROUND_INTENSITY)?FOREGROUND_INTENSITY:0) |
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0;
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new_attributes = (attributes & ~color_mask) | (new_attributes & color_mask);
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SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), new_attributes);
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return 0;
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}
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const char *Process::ResetColor() {
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if (UseANSI) return "\033[0m";
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SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), defaultColors());
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return 0;
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}
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// Include GetLastError() in a fatal error message.
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static void ReportLastErrorFatal(const char *Msg) {
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std::string ErrMsg;
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MakeErrMsg(&ErrMsg, Msg);
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report_fatal_error(ErrMsg);
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}
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unsigned Process::GetRandomNumber() {
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HCRYPTPROV HCPC;
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if (!::CryptAcquireContextW(&HCPC, NULL, NULL, PROV_RSA_FULL,
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CRYPT_VERIFYCONTEXT))
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ReportLastErrorFatal("Could not acquire a cryptographic context");
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ScopedCryptContext CryptoProvider(HCPC);
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unsigned Ret;
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if (!::CryptGenRandom(CryptoProvider, sizeof(Ret),
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reinterpret_cast<BYTE *>(&Ret)))
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ReportLastErrorFatal("Could not generate a random number");
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return Ret;
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}
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