llvm-6502/lib/Support/Windows/Process.inc
Ahmed Charles c75dc7412b Remove unnecessary variables.
Found self-hosting clang-cl on windows. :)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@202935 91177308-0d34-0410-b5e6-96231b3b80d8
2014-03-05 05:04:00 +00:00

377 lines
12 KiB
C++

//===- Win32/Process.cpp - Win32 Process Implementation ------- -*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file provides the Win32 specific implementation of the Process class.
//
//===----------------------------------------------------------------------===//
#include "llvm/Support/Allocator.h"
#include <malloc.h>
// The Windows.h header must be after LLVM and standard headers.
#include "WindowsSupport.h"
#include <direct.h>
#include <io.h>
#include <psapi.h>
#include <shellapi.h>
#ifdef __MINGW32__
#if (HAVE_LIBPSAPI != 1)
#error "libpsapi.a should be present"
#endif
#if (HAVE_LIBSHELL32 != 1)
#error "libshell32.a should be present"
#endif
#else
#pragma comment(lib, "psapi.lib")
#pragma comment(lib, "shell32.lib")
#endif
//===----------------------------------------------------------------------===//
//=== WARNING: Implementation here must contain only Win32 specific code
//=== and must not be UNIX code
//===----------------------------------------------------------------------===//
#ifdef __MINGW32__
// This ban should be lifted when MinGW 1.0+ has defined this value.
# define _HEAPOK (-2)
#endif
using namespace llvm;
using namespace sys;
process::id_type self_process::get_id() {
return GetCurrentProcessId();
}
static TimeValue getTimeValueFromFILETIME(FILETIME Time) {
ULARGE_INTEGER TimeInteger;
TimeInteger.LowPart = Time.dwLowDateTime;
TimeInteger.HighPart = Time.dwHighDateTime;
// FILETIME's are # of 100 nanosecond ticks (1/10th of a microsecond)
return TimeValue(
static_cast<TimeValue::SecondsType>(TimeInteger.QuadPart / 10000000),
static_cast<TimeValue::NanoSecondsType>(
(TimeInteger.QuadPart % 10000000) * 100));
}
TimeValue self_process::get_user_time() const {
FILETIME ProcCreate, ProcExit, KernelTime, UserTime;
if (GetProcessTimes(GetCurrentProcess(), &ProcCreate, &ProcExit, &KernelTime,
&UserTime) == 0)
return TimeValue();
return getTimeValueFromFILETIME(UserTime);
}
TimeValue self_process::get_system_time() const {
FILETIME ProcCreate, ProcExit, KernelTime, UserTime;
if (GetProcessTimes(GetCurrentProcess(), &ProcCreate, &ProcExit, &KernelTime,
&UserTime) == 0)
return TimeValue();
return getTimeValueFromFILETIME(KernelTime);
}
// This function retrieves the page size using GetSystemInfo and is present
// solely so it can be called once to initialize the self_process member below.
static unsigned getPageSize() {
// NOTE: A 32-bit application running under WOW64 is supposed to use
// GetNativeSystemInfo. However, this interface is not present prior
// to Windows XP so to use it requires dynamic linking. It is not clear
// how this affects the reported page size, if at all. One could argue
// that LLVM ought to run as 64-bits on a 64-bit system, anyway.
SYSTEM_INFO info;
GetSystemInfo(&info);
// FIXME: FileOffset in MapViewOfFile() should be aligned to not dwPageSize,
// but dwAllocationGranularity.
return static_cast<unsigned>(info.dwPageSize);
}
// This constructor guaranteed to be run exactly once on a single thread, and
// sets up various process invariants that can be queried cheaply from then on.
self_process::self_process() : PageSize(getPageSize()) {
}
size_t
Process::GetMallocUsage()
{
_HEAPINFO hinfo;
hinfo._pentry = NULL;
size_t size = 0;
while (_heapwalk(&hinfo) == _HEAPOK)
size += hinfo._size;
return size;
}
void Process::GetTimeUsage(TimeValue &elapsed, TimeValue &user_time,
TimeValue &sys_time) {
elapsed = TimeValue::now();
FILETIME ProcCreate, ProcExit, KernelTime, UserTime;
if (GetProcessTimes(GetCurrentProcess(), &ProcCreate, &ProcExit, &KernelTime,
&UserTime) == 0)
return;
user_time = getTimeValueFromFILETIME(UserTime);
sys_time = getTimeValueFromFILETIME(KernelTime);
}
// Some LLVM programs such as bugpoint produce core files as a normal part of
// their operation. To prevent the disk from filling up, this configuration
// item does what's necessary to prevent their generation.
void Process::PreventCoreFiles() {
// Windows does have the concept of core files, called minidumps. However,
// disabling minidumps for a particular application extends past the lifetime
// of that application, which is the incorrect behavior for this API.
// Additionally, the APIs require elevated privileges to disable and re-
// enable minidumps, which makes this untenable. For more information, see
// WerAddExcludedApplication and WerRemoveExcludedApplication (Vista and
// later).
//
// Windows also has modal pop-up message boxes. As this method is used by
// bugpoint, preventing these pop-ups is additionally important.
SetErrorMode(SEM_FAILCRITICALERRORS |
SEM_NOGPFAULTERRORBOX |
SEM_NOOPENFILEERRORBOX);
}
/// Returns the environment variable \arg Name's value as a string encoded in
/// UTF-8. \arg Name is assumed to be in UTF-8 encoding.
Optional<std::string> Process::GetEnv(StringRef Name) {
// Convert the argument to UTF-16 to pass it to _wgetenv().
SmallVector<wchar_t, 128> NameUTF16;
if (windows::UTF8ToUTF16(Name, NameUTF16))
return None;
// Environment variable can be encoded in non-UTF8 encoding, and there's no
// way to know what the encoding is. The only reliable way to look up
// multibyte environment variable is to use GetEnvironmentVariableW().
SmallVector<wchar_t, MAX_PATH> Buf;
size_t Size = MAX_PATH;
do {
Buf.reserve(Size);
Size =
GetEnvironmentVariableW(NameUTF16.data(), Buf.data(), Buf.capacity());
if (Size == 0)
return None;
// Try again with larger buffer.
} while (Size > Buf.capacity());
Buf.set_size(Size);
// Convert the result from UTF-16 to UTF-8.
SmallVector<char, MAX_PATH> Res;
if (windows::UTF16ToUTF8(Buf.data(), Size, Res))
return None;
return std::string(Res.data());
}
error_code
Process::GetArgumentVector(SmallVectorImpl<const char *> &Args,
ArrayRef<const char *>,
SpecificBumpPtrAllocator<char> &ArgAllocator) {
int NewArgCount;
error_code ec;
wchar_t **UnicodeCommandLine = CommandLineToArgvW(GetCommandLineW(),
&NewArgCount);
if (!UnicodeCommandLine)
return windows_error(::GetLastError());
Args.reserve(NewArgCount);
for (int i = 0; i < NewArgCount; ++i) {
SmallVector<char, MAX_PATH> NewArgString;
ec = windows::UTF16ToUTF8(UnicodeCommandLine[i],
wcslen(UnicodeCommandLine[i]),
NewArgString);
if (ec)
break;
char *Buffer = ArgAllocator.Allocate(NewArgString.size() + 1);
::memcpy(Buffer, NewArgString.data(), NewArgString.size() + 1);
Args.push_back(Buffer);
}
LocalFree(UnicodeCommandLine);
if (ec)
return ec;
return error_code::success();
}
bool Process::StandardInIsUserInput() {
return FileDescriptorIsDisplayed(0);
}
bool Process::StandardOutIsDisplayed() {
return FileDescriptorIsDisplayed(1);
}
bool Process::StandardErrIsDisplayed() {
return FileDescriptorIsDisplayed(2);
}
bool Process::FileDescriptorIsDisplayed(int fd) {
DWORD Mode; // Unused
return (GetConsoleMode((HANDLE)_get_osfhandle(fd), &Mode) != 0);
}
unsigned Process::StandardOutColumns() {
unsigned Columns = 0;
CONSOLE_SCREEN_BUFFER_INFO csbi;
if (GetConsoleScreenBufferInfo(GetStdHandle(STD_OUTPUT_HANDLE), &csbi))
Columns = csbi.dwSize.X;
return Columns;
}
unsigned Process::StandardErrColumns() {
unsigned Columns = 0;
CONSOLE_SCREEN_BUFFER_INFO csbi;
if (GetConsoleScreenBufferInfo(GetStdHandle(STD_ERROR_HANDLE), &csbi))
Columns = csbi.dwSize.X;
return Columns;
}
// The terminal always has colors.
bool Process::FileDescriptorHasColors(int fd) {
return FileDescriptorIsDisplayed(fd);
}
bool Process::StandardOutHasColors() {
return FileDescriptorHasColors(1);
}
bool Process::StandardErrHasColors() {
return FileDescriptorHasColors(2);
}
static bool UseANSI = false;
void Process::UseANSIEscapeCodes(bool enable) {
UseANSI = enable;
}
namespace {
class DefaultColors
{
private:
WORD defaultColor;
public:
DefaultColors()
:defaultColor(GetCurrentColor()) {}
static unsigned GetCurrentColor() {
CONSOLE_SCREEN_BUFFER_INFO csbi;
if (GetConsoleScreenBufferInfo(GetStdHandle(STD_OUTPUT_HANDLE), &csbi))
return csbi.wAttributes;
return 0;
}
WORD operator()() const { return defaultColor; }
};
DefaultColors defaultColors;
}
bool Process::ColorNeedsFlush() {
return !UseANSI;
}
const char *Process::OutputBold(bool bg) {
if (UseANSI) return "\033[1m";
WORD colors = DefaultColors::GetCurrentColor();
if (bg)
colors |= BACKGROUND_INTENSITY;
else
colors |= FOREGROUND_INTENSITY;
SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), colors);
return 0;
}
const char *Process::OutputColor(char code, bool bold, bool bg) {
if (UseANSI) return colorcodes[bg?1:0][bold?1:0][code&7];
WORD colors;
if (bg) {
colors = ((code&1) ? BACKGROUND_RED : 0) |
((code&2) ? BACKGROUND_GREEN : 0 ) |
((code&4) ? BACKGROUND_BLUE : 0);
if (bold)
colors |= BACKGROUND_INTENSITY;
} else {
colors = ((code&1) ? FOREGROUND_RED : 0) |
((code&2) ? FOREGROUND_GREEN : 0 ) |
((code&4) ? FOREGROUND_BLUE : 0);
if (bold)
colors |= FOREGROUND_INTENSITY;
}
SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), colors);
return 0;
}
static WORD GetConsoleTextAttribute(HANDLE hConsoleOutput) {
CONSOLE_SCREEN_BUFFER_INFO info;
GetConsoleScreenBufferInfo(GetStdHandle(STD_OUTPUT_HANDLE), &info);
return info.wAttributes;
}
const char *Process::OutputReverse() {
if (UseANSI) return "\033[7m";
const WORD attributes
= GetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE));
const WORD foreground_mask = FOREGROUND_BLUE | FOREGROUND_GREEN |
FOREGROUND_RED | FOREGROUND_INTENSITY;
const WORD background_mask = BACKGROUND_BLUE | BACKGROUND_GREEN |
BACKGROUND_RED | BACKGROUND_INTENSITY;
const WORD color_mask = foreground_mask | background_mask;
WORD new_attributes =
((attributes & FOREGROUND_BLUE )?BACKGROUND_BLUE :0) |
((attributes & FOREGROUND_GREEN )?BACKGROUND_GREEN :0) |
((attributes & FOREGROUND_RED )?BACKGROUND_RED :0) |
((attributes & FOREGROUND_INTENSITY)?BACKGROUND_INTENSITY:0) |
((attributes & BACKGROUND_BLUE )?FOREGROUND_BLUE :0) |
((attributes & BACKGROUND_GREEN )?FOREGROUND_GREEN :0) |
((attributes & BACKGROUND_RED )?FOREGROUND_RED :0) |
((attributes & BACKGROUND_INTENSITY)?FOREGROUND_INTENSITY:0) |
0;
new_attributes = (attributes & ~color_mask) | (new_attributes & color_mask);
SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), new_attributes);
return 0;
}
const char *Process::ResetColor() {
if (UseANSI) return "\033[0m";
SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), defaultColors());
return 0;
}
unsigned Process::GetRandomNumber() {
HCRYPTPROV HCPC;
if (!::CryptAcquireContextW(&HCPC, NULL, NULL, PROV_RSA_FULL,
CRYPT_VERIFYCONTEXT))
assert(false && "Could not acquire a cryptographic context");
ScopedCryptContext CryptoProvider(HCPC);
unsigned Ret;
if (!::CryptGenRandom(CryptoProvider, sizeof(Ret),
reinterpret_cast<BYTE *>(&Ret)))
assert(false && "Could not generate a random number");
return Ret;
}