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📄 AArch64TargetParser.def(12.01 KB)
📄 AArch64TargetParser.h(4.89 KB)
📄 AMDGPUMetadata.h(17.98 KB)
📄 AMDHSAKernelDescriptor.h(7.63 KB)
📄 ARMAttributeParser.h(3.2 KB)
📄 ARMBuildAttributes.h(8.6 KB)
📄 ARMEHABI.h(3.72 KB)
📄 ARMTargetParser.def(18.94 KB)
📄 ARMTargetParser.h(8.76 KB)
📄 ARMWinEH.h(18.27 KB)
📄 AlignOf.h(1.56 KB)
📄 Alignment.h(12.95 KB)
📄 Allocator.h(16.54 KB)
📄 AllocatorBase.h(3.87 KB)
📄 ArrayRecycler.h(4.78 KB)
📄 Atomic.h(1.09 KB)
📄 AtomicOrdering.h(6.01 KB)
📄 Automaton.h(9.64 KB)
📄 Base64.h(1.84 KB)
📄 BinaryByteStream.h(9.14 KB)
📄 BinaryItemStream.h(3.63 KB)
📄 BinaryStream.h(3.75 KB)
📄 BinaryStreamArray.h(12.46 KB)
📄 BinaryStreamError.h(1.29 KB)
📄 BinaryStreamReader.h(11.01 KB)
📄 BinaryStreamRef.h(10.09 KB)
📄 BinaryStreamWriter.h(7.79 KB)
📄 BlockFrequency.h(2.41 KB)
📄 BranchProbability.h(7.92 KB)
📄 BuryPointer.h(1.03 KB)
📄 CBindingWrapping.h(1.86 KB)
📄 CFGDiff.h(9.95 KB)
📄 CFGUpdate.h(4.12 KB)
📄 COM.h(1004 B)
📄 CRC.h(1.63 KB)
📄 CachePruning.h(3.5 KB)
📄 Capacity.h(972 B)
📄 Casting.h(13.92 KB)
📄 CheckedArithmetic.h(3.71 KB)
📄 Chrono.h(5.78 KB)
📄 CodeGen.h(1.96 KB)
📄 CodeGenCoverage.h(1.18 KB)
📄 CommandLine.h(71.22 KB)
📄 Compiler.h(19.5 KB)
📄 Compression.h(1.39 KB)
📄 ConvertUTF.h(11.4 KB)
📄 CrashRecoveryContext.h(9.26 KB)
📄 DJB.h(1.05 KB)
📄 DOTGraphTraits.h(5.58 KB)
📄 DataExtractor.h(30.28 KB)
📄 DataTypes.h(775 B)
📄 Debug.h(4.7 KB)
📄 DebugCounter.h(7.01 KB)
📄 DynamicLibrary.h(5.77 KB)
📄 ELFAttributeParser.h(2.22 KB)
📄 ELFAttributes.h(1.02 KB)
📄 Endian.h(14.28 KB)
📄 EndianStream.h(1.93 KB)
📄 Errc.h(3.8 KB)
📄 Errno.h(1.45 KB)
📄 Error.h(43.82 KB)
📄 ErrorHandling.h(6.39 KB)
📄 ErrorOr.h(7.48 KB)
📄 ExtensibleRTTI.h(4.02 KB)
📄 FileCheck.h(6.69 KB)
📄 FileCollector.h(3.74 KB)
📄 FileOutputBuffer.h(3.36 KB)
📄 FileSystem.h(53.03 KB)
📄 FileUtilities.h(3.83 KB)
📄 Format.h(9.45 KB)
📄 FormatAdapters.h(3.38 KB)
📄 FormatCommon.h(2.05 KB)
📄 FormatProviders.h(15.27 KB)
📄 FormatVariadic.h(9.88 KB)
📄 FormatVariadicDetails.h(5.3 KB)
📄 FormattedStream.h(6.42 KB)
📄 GenericDomTree.h(30.89 KB)
📄 GenericDomTreeConstruction.h(63.42 KB)
📄 GenericIteratedDominanceFrontier.h(7.31 KB)
📄 GlobPattern.h(1.35 KB)
📄 GraphWriter.h(11.79 KB)
📄 Host.h(2.68 KB)
📄 InitLLVM.h(1.79 KB)
📄 ItaniumManglingCanonicalizer.h(3.17 KB)
📄 JSON.h(28.25 KB)
📄 KnownBits.h(8.35 KB)
📄 LEB128.h(5.74 KB)
📄 LineIterator.h(2.62 KB)
📄 Locale.h(223 B)
📄 LockFileManager.h(3.13 KB)
📄 LowLevelTypeImpl.h(11.94 KB)
📄 MD5.h(3.39 KB)
📄 MSVCErrorWorkarounds.h(2.62 KB)
📄 MachineValueType.h(42.37 KB)
📄 ManagedStatic.h(4.21 KB)
📄 MathExtras.h(32.81 KB)
📄 MemAlloc.h(3.21 KB)
📄 Memory.h(6.94 KB)
📄 MemoryBuffer.h(10.98 KB)
📄 MipsABIFlags.h(3.92 KB)
📄 Mutex.h(2.14 KB)
📄 NativeFormatting.h(1.64 KB)
📄 OnDiskHashTable.h(21.97 KB)
📄 OptimizedStructLayout.h(5.89 KB)
📄 Parallel.h(5.99 KB)
📄 Path.h(15.6 KB)
📄 PluginLoader.h(1.29 KB)
📄 PointerLikeTypeTraits.h(5.69 KB)
📄 PrettyStackTrace.h(4.45 KB)
📄 Printable.h(1.5 KB)
📄 Process.h(9.31 KB)
📄 Program.h(10.35 KB)
📄 RISCVAttributeParser.h(1.15 KB)
📄 RISCVAttributes.h(1.2 KB)
📄 RISCVTargetParser.def(446 B)
📄 RWMutex.h(5.65 KB)
📄 RandomNumberGenerator.h(2.29 KB)
📄 Recycler.h(3.47 KB)
📄 RecyclingAllocator.h(2.38 KB)
📄 Regex.h(4.37 KB)
📄 Registry.h(5.14 KB)
📄 ReverseIteration.h(360 B)
📄 SHA1.h(2.37 KB)
📄 SMLoc.h(1.78 KB)
📄 SMTAPI.h(16.33 KB)
📄 SaveAndRestore.h(1.02 KB)
📄 ScaledNumber.h(30.65 KB)
📄 ScopedPrinter.h(11.39 KB)
📄 Signals.h(5.22 KB)
📄 Signposts.h(1.29 KB)
📄 SmallVectorMemoryBuffer.h(2.28 KB)
📁 Solaris
📄 SourceMgr.h(10.37 KB)
📄 SpecialCaseList.h(6.01 KB)
📄 StringSaver.h(1.94 KB)
📄 SuffixTree.h(13.15 KB)
📄 SwapByteOrder.h(4.8 KB)
📄 SymbolRemappingReader.h(4.36 KB)
📄 SystemUtils.h(1.02 KB)
📄 TarWriter.h(941 B)
📄 TargetOpcodes.def(22.01 KB)
📄 TargetParser.h(4.08 KB)
📄 TargetRegistry.h(46.87 KB)
📄 TargetSelect.h(6.2 KB)
📄 TaskQueue.h(4.24 KB)
📄 ThreadLocal.h(2.08 KB)
📄 ThreadPool.h(3.44 KB)
📄 Threading.h(10.62 KB)
📄 TimeProfiler.h(3.46 KB)
📄 Timer.h(8.93 KB)
📄 ToolOutputFile.h(2.24 KB)
📄 TrailingObjects.h(15.19 KB)
📄 TrigramIndex.h(2.84 KB)
📄 TypeName.h(2.13 KB)
📄 TypeSize.h(8.53 KB)
📄 Unicode.h(2.5 KB)
📄 UnicodeCharRanges.h(3.27 KB)
📄 Valgrind.h(1.16 KB)
📄 VersionTuple.h(5.22 KB)
📄 VirtualFileSystem.h(28.28 KB)
📄 Watchdog.h(1.15 KB)
📄 Win64EH.h(4.82 KB)
📁 Windows
📄 WindowsError.h(541 B)
📄 WithColor.h(4.64 KB)
📄 X86DisassemblerDecoderCommon.h(29.39 KB)
📄 X86TargetParser.def(8.21 KB)
📄 X86TargetParser.h(3.57 KB)
📄 YAMLParser.h(16.29 KB)
📄 YAMLTraits.h(67.62 KB)
📄 circular_raw_ostream.h(4.97 KB)
📄 raw_os_ostream.h(1.29 KB)
📄 raw_ostream.h(20.82 KB)
📄 raw_sha1_ostream.h(1.29 KB)
📄 thread.h(1.33 KB)
📄 type_traits.h(6.75 KB)
📄 xxhash.h(1.92 KB)

Editing: Process.h

//===- llvm/Support/Process.h -----------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
/// \file
///
/// Provides a library for accessing information about this process and other
/// processes on the operating system. Also provides means of spawning
/// subprocess for commands. The design of this library is modeled after the
/// proposed design of the Boost.Process library, and is design specifically to
/// follow the style of standard libraries and potentially become a proposal
/// for a standard library.
///
/// This file declares the llvm::sys::Process class which contains a collection
/// of legacy static interfaces for extracting various information about the
/// current process. The goal is to migrate users of this API over to the new
/// interfaces.
///
//===----------------------------------------------------------------------===//

#ifndef LLVM_SUPPORT_PROCESS_H
#define LLVM_SUPPORT_PROCESS_H

#include "llvm/ADT/Optional.h"
#include "llvm/Support/AllocatorBase.h"
#include "llvm/Support/Chrono.h"
#include "llvm/Support/DataTypes.h"
#include "llvm/Support/Error.h"
#include <system_error>

namespace llvm {
template <typename T> class ArrayRef;
class StringRef;

namespace sys {

/// A collection of legacy interfaces for querying information about the
/// current executing process.
class Process {
public:
  using Pid = int32_t;

/// Get the process's identifier.
  static Pid getProcessId();

/// Get the process's page size.
  /// This may fail if the underlying syscall returns an error. In most cases,
  /// page size information is used for optimization, and this error can be
  /// safely discarded by calling consumeError, and an estimated page size
  /// substituted instead.
  static Expected<unsigned> getPageSize();

/// Get the process's estimated page size.
  /// This function always succeeds, but if the underlying syscall to determine
  /// the page size fails then this will silently return an estimated page size.
  /// The estimated page size is guaranteed to be a power of 2.
  static unsigned getPageSizeEstimate() {
    if (auto PageSize = getPageSize())
      return *PageSize;
    else {
      consumeError(PageSize.takeError());
      return 4096;
    }
  }

/// Return process memory usage.
  /// This static function will return the total amount of memory allocated
  /// by the process. This only counts the memory allocated via the malloc,
  /// calloc and realloc functions and includes any "free" holes in the
  /// allocated space.
  static size_t GetMallocUsage();

/// This static function will set \p user_time to the amount of CPU time
  /// spent in user (non-kernel) mode and \p sys_time to the amount of CPU
  /// time spent in system (kernel) mode.  If the operating system does not
  /// support collection of these metrics, a zero duration will be for both
  /// values.
  /// \param elapsed Returns the system_clock::now() giving current time
  /// \param user_time Returns the current amount of user time for the process
  /// \param sys_time Returns the current amount of system time for the process
  static void GetTimeUsage(TimePoint<> &elapsed,
                           std::chrono::nanoseconds &user_time,
                           std::chrono::nanoseconds &sys_time);

/// This function makes the necessary calls to the operating system to
  /// prevent core files or any other kind of large memory dumps that can
  /// occur when a program fails.
  /// Prevent core file generation.
  static void PreventCoreFiles();

/// true if PreventCoreFiles has been called, false otherwise.
  static bool AreCoreFilesPrevented();

// This function returns the environment variable \arg name's value as a UTF-8
  // string. \arg Name is assumed to be in UTF-8 encoding too.
  static Optional<std::string> GetEnv(StringRef name);

/// This function searches for an existing file in the list of directories
  /// in a PATH like environment variable, and returns the first file found,
  /// according to the order of the entries in the PATH like environment
  /// variable.  If an ignore list is specified, then any folder which is in
  /// the PATH like environment variable but is also in IgnoreList is not
  /// considered.
  static Optional<std::string> FindInEnvPath(StringRef EnvName,
                                             StringRef FileName,
                                             ArrayRef<std::string> IgnoreList);

static Optional<std::string> FindInEnvPath(StringRef EnvName,
                                             StringRef FileName);

// This functions ensures that the standard file descriptors (input, output,
  // and error) are properly mapped to a file descriptor before we use any of
  // them.  This should only be called by standalone programs, library
  // components should not call this.
  static std::error_code FixupStandardFileDescriptors();

// This function safely closes a file descriptor.  It is not safe to retry
  // close(2) when it returns with errno equivalent to EINTR; this is because
  // *nixen cannot agree if the file descriptor is, in fact, closed when this
  // occurs.
  //
  // N.B. Some operating systems, due to thread cancellation, cannot properly
  // guarantee that it will or will not be closed one way or the other!
  static std::error_code SafelyCloseFileDescriptor(int FD);

/// This function determines if the standard input is connected directly
  /// to a user's input (keyboard probably), rather than coming from a file
  /// or pipe.
  static bool StandardInIsUserInput();

/// This function determines if the standard output is connected to a
  /// "tty" or "console" window. That is, the output would be displayed to
  /// the user rather than being put on a pipe or stored in a file.
  static bool StandardOutIsDisplayed();

/// This function determines if the standard error is connected to a
  /// "tty" or "console" window. That is, the output would be displayed to
  /// the user rather than being put on a pipe or stored in a file.
  static bool StandardErrIsDisplayed();

/// This function determines if the given file descriptor is connected to
  /// a "tty" or "console" window. That is, the output would be displayed to
  /// the user rather than being put on a pipe or stored in a file.
  static bool FileDescriptorIsDisplayed(int fd);

/// This function determines if the given file descriptor is displayd and
  /// supports colors.
  static bool FileDescriptorHasColors(int fd);

/// This function determines the number of columns in the window
  /// if standard output is connected to a "tty" or "console"
  /// window. If standard output is not connected to a tty or
  /// console, or if the number of columns cannot be determined,
  /// this routine returns zero.
  static unsigned StandardOutColumns();

/// This function determines the number of columns in the window
  /// if standard error is connected to a "tty" or "console"
  /// window. If standard error is not connected to a tty or
  /// console, or if the number of columns cannot be determined,
  /// this routine returns zero.
  static unsigned StandardErrColumns();

/// This function determines whether the terminal connected to standard
  /// output supports colors. If standard output is not connected to a
  /// terminal, this function returns false.
  static bool StandardOutHasColors();

/// This function determines whether the terminal connected to standard
  /// error supports colors. If standard error is not connected to a
  /// terminal, this function returns false.
  static bool StandardErrHasColors();

/// Enables or disables whether ANSI escape sequences are used to output
  /// colors. This only has an effect on Windows.
  /// Note: Setting this option is not thread-safe and should only be done
  /// during initialization.
  static void UseANSIEscapeCodes(bool enable);

/// Whether changing colors requires the output to be flushed.
  /// This is needed on systems that don't support escape sequences for
  /// changing colors.
  static bool ColorNeedsFlush();

/// This function returns the colorcode escape sequences.
  /// If ColorNeedsFlush() is true then this function will change the colors
  /// and return an empty escape sequence. In that case it is the
  /// responsibility of the client to flush the output stream prior to
  /// calling this function.
  static const char *OutputColor(char c, bool bold, bool bg);

/// Same as OutputColor, but only enables the bold attribute.
  static const char *OutputBold(bool bg);

/// This function returns the escape sequence to reverse forground and
  /// background colors.
  static const char *OutputReverse();

/// Resets the terminals colors, or returns an escape sequence to do so.
  static const char *ResetColor();

/// Get the result of a process wide random number generator. The
  /// generator will be automatically seeded in non-deterministic fashion.
  static unsigned GetRandomNumber();

/// Equivalent to ::exit(), except when running inside a CrashRecoveryContext.
  /// In that case, the control flow will resume after RunSafely(), like for a
  /// crash, rather than exiting the current process.
  LLVM_ATTRIBUTE_NORETURN
  static void Exit(int RetCode);
};

}
}

#endif

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Editing: Process.h

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