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https://github.com/c64scene-ar/llvm-6502.git
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6b8a63ae58
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21704 91177308-0d34-0410-b5e6-96231b3b80d8
160 lines
4.0 KiB
C++
160 lines
4.0 KiB
C++
//===- Unix/Process.cpp - Unix 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 was developed by Reid Spencer and is distributed under the
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// University of Illinois Open Source 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 generic Unix implementation of the Process class.
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//
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//===----------------------------------------------------------------------===//
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#include "Unix.h"
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#ifdef HAVE_SYS_TIME_H
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#include <sys/time.h>
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#endif
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#ifdef HAVE_SYS_RESOURCE_H
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#include <sys/resource.h>
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#endif
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#ifdef HAVE_MALLOC_H
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#include <malloc.h>
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#endif
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//===----------------------------------------------------------------------===//
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//=== WARNING: Implementation here must contain only generic UNIX code that
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//=== is guaranteed to work on *all* UNIX variants.
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//===----------------------------------------------------------------------===//
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namespace llvm {
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using namespace sys;
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unsigned
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Process::GetPageSize()
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{
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#if defined(HAVE_GETPAGESIZE)
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static const int page_size = ::getpagesize();
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#elif defined(HAVE_SYSCONF)
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static long page_size = ::sysconf(_SC_PAGE_SIZE);
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#else
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#warning Cannot get the page size on this machine
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#endif
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return static_cast<unsigned>(page_size);
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}
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#if defined(HAVE_SBRK)
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static char* som = reinterpret_cast<char*>(::sbrk(0));
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#endif
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size_t
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Process::GetMallocUsage()
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{
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#if defined(HAVE_MALLINFO)
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struct mallinfo mi;
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mi = ::mallinfo();
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return mi.uordblks;
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#elif defined(HAVE_SBRK)
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// Note this is only an approximation and more closely resembles
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// the value returned by mallinfo in the arena field.
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char * eom = (char*) sbrk(0);
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if (eom != ((char*)-1) && som != ((char*)-1))
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return eom - som;
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else
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return 0;
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#else
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#warning Cannot get malloc info on this platform
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return 0;
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#endif
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}
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size_t
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Process::GetTotalMemoryUsage()
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{
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#if defined(HAVE_MALLINFO)
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struct mallinfo mi = ::mallinfo();
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return mi.uordblks + mi.hblkhd;
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#elif defined(HAVE_GETRUSAGE)
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struct rusage usage;
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::getrusage(RUSAGE_SELF, &usage);
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return usage.ru_maxrss;
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#else
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#warning Cannot get total memory size on this platform
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return 0;
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#endif
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}
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void
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Process::GetTimeUsage(TimeValue& elapsed, TimeValue& user_time,
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TimeValue& sys_time)
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{
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elapsed = TimeValue::now();
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#if defined(HAVE_GETRUSAGE)
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struct rusage usage;
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::getrusage(RUSAGE_SELF, &usage);
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user_time = TimeValue(
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static_cast<TimeValue::SecondsType>( usage.ru_utime.tv_sec ),
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static_cast<TimeValue::NanoSecondsType>( usage.ru_utime.tv_usec *
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TimeValue::NANOSECONDS_PER_MICROSECOND ) );
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sys_time = TimeValue(
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static_cast<TimeValue::SecondsType>( usage.ru_stime.tv_sec ),
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static_cast<TimeValue::NanoSecondsType>( usage.ru_stime.tv_usec *
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TimeValue::NANOSECONDS_PER_MICROSECOND ) );
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#else
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#warning Cannot get usage times on this platform
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user_time.seconds(0);
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user_time.microseconds(0);
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sys_time.seconds(0);
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sys_time.microseconds(0);
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#endif
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}
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int Process::GetCurrentUserId()
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{
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return getuid();
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}
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int Process::GetCurrentGroupId()
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{
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return getgid();
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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 function
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// does what's necessary to prevent their generation.
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void Process::PreventCoreFiles() {
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#if HAVE_SETRLIMIT
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struct rlimit rlim;
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rlim.rlim_cur = rlim.rlim_max = 0;
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int res = setrlimit(RLIMIT_CORE, &rlim);
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if (res != 0)
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ThrowErrno("Can't prevent core file generation");
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#endif
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}
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bool Process::StandardInIsUserInput() {
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#if HAVE_ISATTY
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return isatty(0);
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#endif
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// If we don't have isatty, just return false.
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return false;
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}
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bool Process::StandardOutIsDisplayed() {
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#if HAVE_ISATTY
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return isatty(1);
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#endif
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// If we don't have isatty, just return false.
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return false;
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}
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bool Process::StandardErrIsDisplayed() {
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#if HAVE_ISATTY
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return isatty(2);
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#endif
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// If we don't have isatty, just return false.
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return false;
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}
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}
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