forked from OSchip/llvm-project
125 lines
3.9 KiB
C++
125 lines
3.9 KiB
C++
//===-- Process.cpp - Implement OS Process Concept --------------*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file implements the operating system Process concept.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/ADT/StringExtras.h"
|
|
#include "llvm/Config/config.h"
|
|
#include "llvm/Support/ErrorHandling.h"
|
|
#include "llvm/Support/FileSystem.h"
|
|
#include "llvm/Support/Process.h"
|
|
#include "llvm/Support/Program.h"
|
|
|
|
using namespace llvm;
|
|
using namespace sys;
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
//=== WARNING: Implementation here must contain only TRULY operating system
|
|
//=== independent code.
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
// Empty virtual destructor to anchor the vtable for the process class.
|
|
process::~process() {}
|
|
|
|
self_process *process::get_self() {
|
|
// Use a function local static for thread safe initialization and allocate it
|
|
// as a raw pointer to ensure it is never destroyed.
|
|
static self_process *SP = new self_process();
|
|
|
|
return SP;
|
|
}
|
|
|
|
// The destructor for the self_process subclass must never actually be
|
|
// executed. There should be at most one instance of this class, and that
|
|
// instance should live until the process terminates to avoid the potential for
|
|
// racy accesses during shutdown.
|
|
self_process::~self_process() {
|
|
llvm_unreachable("This destructor must never be executed!");
|
|
}
|
|
|
|
/// \brief A helper function to compute the elapsed wall-time since the program
|
|
/// started.
|
|
///
|
|
/// Note that this routine actually computes the elapsed wall time since the
|
|
/// first time it was called. However, we arrange to have it called during the
|
|
/// startup of the process to get approximately correct results.
|
|
static TimeValue getElapsedWallTime() {
|
|
static TimeValue &StartTime = *new TimeValue(TimeValue::now());
|
|
return TimeValue::now() - StartTime;
|
|
}
|
|
|
|
/// \brief A special global variable to ensure we call \c getElapsedWallTime
|
|
/// during global initialization of the program.
|
|
///
|
|
/// Note that this variable is never referenced elsewhere. Doing so could
|
|
/// create race conditions during program startup or shutdown.
|
|
static volatile TimeValue DummyTimeValue = getElapsedWallTime();
|
|
|
|
// Implement this routine by using the static helpers above. They're already
|
|
// portable.
|
|
TimeValue self_process::get_wall_time() const {
|
|
return getElapsedWallTime();
|
|
}
|
|
|
|
Optional<std::string> Process::FindInEnvPath(const std::string& EnvName,
|
|
const std::string& FileName)
|
|
{
|
|
Optional<std::string> FoundPath;
|
|
Optional<std::string> OptPath = Process::GetEnv(EnvName);
|
|
if (!OptPath.hasValue())
|
|
return FoundPath;
|
|
|
|
const char EnvPathSeparatorStr[] = {EnvPathSeparator, '\0'};
|
|
SmallVector<StringRef, 8> Dirs;
|
|
SplitString(OptPath.getValue(), Dirs, EnvPathSeparatorStr);
|
|
|
|
for (const auto &Dir : Dirs) {
|
|
if (Dir.empty())
|
|
continue;
|
|
|
|
SmallString<128> FilePath(Dir);
|
|
path::append(FilePath, FileName);
|
|
if (fs::exists(Twine(FilePath))) {
|
|
FoundPath = FilePath.str();
|
|
break;
|
|
}
|
|
}
|
|
|
|
return FoundPath;
|
|
}
|
|
|
|
|
|
#define COLOR(FGBG, CODE, BOLD) "\033[0;" BOLD FGBG CODE "m"
|
|
|
|
#define ALLCOLORS(FGBG,BOLD) {\
|
|
COLOR(FGBG, "0", BOLD),\
|
|
COLOR(FGBG, "1", BOLD),\
|
|
COLOR(FGBG, "2", BOLD),\
|
|
COLOR(FGBG, "3", BOLD),\
|
|
COLOR(FGBG, "4", BOLD),\
|
|
COLOR(FGBG, "5", BOLD),\
|
|
COLOR(FGBG, "6", BOLD),\
|
|
COLOR(FGBG, "7", BOLD)\
|
|
}
|
|
|
|
static const char colorcodes[2][2][8][10] = {
|
|
{ ALLCOLORS("3",""), ALLCOLORS("3","1;") },
|
|
{ ALLCOLORS("4",""), ALLCOLORS("4","1;") }
|
|
};
|
|
|
|
// Include the platform-specific parts of this class.
|
|
#ifdef LLVM_ON_UNIX
|
|
#include "Unix/Process.inc"
|
|
#endif
|
|
#ifdef LLVM_ON_WIN32
|
|
#include "Windows/Process.inc"
|
|
#endif
|