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//===- Win32/Process.cpp - Win32 Process Implementation ------- -*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by Jeff Cohen and 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 "Win32.h"
#include <psapi.h>
#include <malloc.h>
#include <io.h>
#pragma comment(lib, "psapi.lib")
//===----------------------------------------------------------------------===//
//=== WARNING: Implementation here must contain only Win32 specific code
//=== and must not be UNIX code
//===----------------------------------------------------------------------===//
#ifdef __MINGW
// This ban should be lifted when MinGW 1.0+ has defined this value.
# define _HEAPOK (-2)
#endif
namespace llvm {
using namespace sys;
// This function retrieves the page size using GetSystemInfo and is present
// solely so it can be called once in Process::GetPageSize to initialize the
// static variable PageSize.
inline unsigned GetPageSizeOnce() {
// 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);
return static_cast<unsigned>(info.dwPageSize);
}
unsigned
Process::GetPageSize() {
static const unsigned PageSize = GetPageSizeOnce();
return PageSize;
}
size_t
Process::GetMallocUsage()
{
_HEAPINFO hinfo;
hinfo._pentry = NULL;
size_t size = 0;
while (_heapwalk(&hinfo) == _HEAPOK)
size += hinfo._size;
return size;
}
size_t
Process::GetTotalMemoryUsage()
{
PROCESS_MEMORY_COUNTERS pmc;
GetProcessMemoryInfo(GetCurrentProcess(), &pmc, sizeof(pmc));
return pmc.PagefileUsage;
}
void
Process::GetTimeUsage(
TimeValue& elapsed, TimeValue& user_time, TimeValue& sys_time)
{
elapsed = TimeValue::now();
uint64_t ProcCreate, ProcExit, KernelTime, UserTime;
GetProcessTimes(GetCurrentProcess(), (FILETIME*)&ProcCreate,
(FILETIME*)&ProcExit, (FILETIME*)&KernelTime,
(FILETIME*)&UserTime);
// FILETIME's are # of 100 nanosecond ticks (1/10th of a microsecond)
user_time.seconds( UserTime / 10000000 );
user_time.nanoseconds( unsigned(UserTime % 10000000) * 100 );
sys_time.seconds( KernelTime / 10000000 );
sys_time.nanoseconds( unsigned(KernelTime % 10000000) * 100 );
}
// 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 doesn't do core files, but it does do modal pop-up message
// boxes. As this method is used by bugpoint, preventing these pop-ups
// is the moral equivalent of suppressing core files.
SetErrorMode(SEM_FAILCRITICALERRORS |
SEM_NOGPFAULTERRORBOX |
SEM_NOOPENFILEERRORBOX);
}
bool Process::StandardInIsUserInput() {
return GetFileType((HANDLE)_get_osfhandle(0)) == FILE_TYPE_CHAR;
}
bool Process::StandardOutIsDisplayed() {
return GetFileType((HANDLE)_get_osfhandle(1)) == FILE_TYPE_CHAR;
}
bool Process::StandardErrIsDisplayed() {
return GetFileType((HANDLE)_get_osfhandle(2)) == FILE_TYPE_CHAR;
}
}
// vim: sw=2 smartindent smarttab tw=80 autoindent expandtab
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