2004-09-11 04:56:56 +00:00
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//===- Unix/Process.cpp - Unix Process Implementation --------- -*- C++ -*-===//
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2010-11-29 18:16:10 +00:00
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//
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2004-09-11 04:56:56 +00:00
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// The LLVM Compiler Infrastructure
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//
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2007-12-29 20:36:04 +00:00
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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2010-11-29 18:16:10 +00:00
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//
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2004-09-11 04:56:56 +00:00
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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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2004-12-20 00:59:28 +00:00
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#include "Unix.h"
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2012-05-08 20:38:00 +00:00
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#include "llvm/ADT/Hashing.h"
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2013-08-07 08:47:36 +00:00
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#include "llvm/Support/Mutex.h"
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#include "llvm/Support/MutexGuard.h"
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2012-05-08 20:38:00 +00:00
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#include "llvm/Support/TimeValue.h"
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2004-12-20 00:59:28 +00:00
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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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2012-08-06 20:52:18 +00:00
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// DragonFlyBSD, OpenBSD, and Bitrig have deprecated <malloc.h> for
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// <stdlib.h> instead. Unix.h includes this for us already.
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#if defined(HAVE_MALLOC_H) && !defined(__DragonFly__) && \
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!defined(__OpenBSD__) && !defined(__Bitrig__)
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2004-12-20 00:59:28 +00:00
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#include <malloc.h>
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#endif
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2005-11-14 07:00:29 +00:00
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#ifdef HAVE_MALLOC_MALLOC_H
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#include <malloc/malloc.h>
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#endif
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2009-05-11 18:05:52 +00:00
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#ifdef HAVE_SYS_IOCTL_H
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# include <sys/ioctl.h>
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#endif
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2009-05-18 17:21:34 +00:00
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#ifdef HAVE_TERMIOS_H
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# include <termios.h>
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#endif
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2004-09-11 04:56:56 +00:00
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2013-08-07 08:47:36 +00:00
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// See if we can use curses to detect information about a terminal when
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// connected to one.
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#ifdef HAVE_CURSES
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# if defined(HAVE_CURSES_H)
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# include <curses.h>
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# elif defined(HAVE_NCURSES_H)
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# include <ncurses.h>
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# elif defined(HAVE_NCURSESW_H)
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# include <ncursesw.h>
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# elif defined(HAVE_NCURSES_CURSES_H)
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# include <ncurses/curses.h>
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# elif defined(HAVE_NCURSESW_CURSES_H)
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# include <ncursesw/curses.h>
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# else
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# error Have a curses library but unable to find a curses header!
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# endif
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# include <term.h>
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#endif
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2004-09-11 04:56:56 +00:00
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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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2006-09-14 06:01:41 +00:00
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using namespace llvm;
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2004-09-11 04:56:56 +00:00
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using namespace sys;
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2012-12-31 11:17:50 +00:00
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process::id_type self_process::get_id() {
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return getpid();
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}
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2013-01-04 23:19:55 +00:00
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static std::pair<TimeValue, TimeValue> getRUsageTimes() {
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#if defined(HAVE_GETRUSAGE)
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struct rusage RU;
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::getrusage(RUSAGE_SELF, &RU);
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return std::make_pair(
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TimeValue(
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static_cast<TimeValue::SecondsType>(RU.ru_utime.tv_sec),
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static_cast<TimeValue::NanoSecondsType>(
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RU.ru_utime.tv_usec * TimeValue::NANOSECONDS_PER_MICROSECOND)),
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TimeValue(
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static_cast<TimeValue::SecondsType>(RU.ru_stime.tv_sec),
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static_cast<TimeValue::NanoSecondsType>(
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RU.ru_stime.tv_usec * 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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return std::make_pair(TimeValue(), TimeValue());
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#endif
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}
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TimeValue self_process::get_user_time() const {
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2013-01-05 00:42:50 +00:00
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#if _POSIX_TIMERS > 0 && _POSIX_CPUTIME > 0
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2013-01-04 23:19:55 +00:00
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// Try to get a high resolution CPU timer.
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struct timespec TS;
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if (::clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &TS) == 0)
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return TimeValue(static_cast<TimeValue::SecondsType>(TS.tv_sec),
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static_cast<TimeValue::NanoSecondsType>(TS.tv_nsec));
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#endif
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// Otherwise fall back to rusage based timing.
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return getRUsageTimes().first;
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}
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TimeValue self_process::get_system_time() const {
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// We can only collect system time by inspecting the results of getrusage.
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return getRUsageTimes().second;
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}
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2012-12-31 23:23:35 +00:00
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static unsigned getPageSize() {
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2009-05-23 17:57:59 +00:00
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#if defined(__CYGWIN__)
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// On Cygwin, getpagesize() returns 64k but the page size for the purposes of
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// memory protection and mmap() is 4k.
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// See http://www.cygwin.com/ml/cygwin/2009-01/threads.html#00492
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2009-08-19 21:48:34 +00:00
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const int page_size = 0x1000;
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2009-05-23 17:57:59 +00:00
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#elif defined(HAVE_GETPAGESIZE)
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2009-08-19 21:48:34 +00:00
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const int page_size = ::getpagesize();
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2004-12-20 00:59:28 +00:00
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#elif defined(HAVE_SYSCONF)
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2009-08-19 21:48:34 +00:00
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long page_size = ::sysconf(_SC_PAGE_SIZE);
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2004-12-20 00:59:28 +00:00
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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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2004-09-11 04:56:56 +00:00
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return static_cast<unsigned>(page_size);
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}
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2012-12-31 23:23:35 +00:00
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// This constructor guaranteed to be run exactly once on a single thread, and
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// sets up various process invariants that can be queried cheaply from then on.
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self_process::self_process() : PageSize(getPageSize()) {
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}
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2005-11-14 07:00:29 +00:00
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size_t Process::GetMallocUsage() {
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2004-12-20 16:06:44 +00:00
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#if defined(HAVE_MALLINFO)
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2004-12-20 00:59:28 +00:00
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struct mallinfo mi;
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mi = ::mallinfo();
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return mi.uordblks;
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2005-11-14 07:27:56 +00:00
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#elif defined(HAVE_MALLOC_ZONE_STATISTICS) && defined(HAVE_MALLOC_MALLOC_H)
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malloc_statistics_t Stats;
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malloc_zone_statistics(malloc_default_zone(), &Stats);
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return Stats.size_in_use; // darwin
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2004-12-20 16:06:44 +00:00
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#elif defined(HAVE_SBRK)
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2004-12-20 00:59:28 +00:00
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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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2005-11-14 07:00:29 +00:00
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static char *StartOfMemory = reinterpret_cast<char*>(::sbrk(0));
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char *EndOfMemory = (char*)sbrk(0);
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if (EndOfMemory != ((char*)-1) && StartOfMemory != ((char*)-1))
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return EndOfMemory - StartOfMemory;
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2004-12-20 00:59:28 +00:00
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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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2013-01-04 23:19:55 +00:00
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void Process::GetTimeUsage(TimeValue &elapsed, TimeValue &user_time,
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TimeValue &sys_time) {
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2004-12-20 00:59:28 +00:00
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elapsed = TimeValue::now();
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2013-01-04 23:19:55 +00:00
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llvm::tie(user_time, sys_time) = getRUsageTimes();
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2004-12-20 00:59:28 +00:00
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}
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2006-09-14 06:01:41 +00:00
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int Process::GetCurrentUserId() {
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2005-04-21 16:12:57 +00:00
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return getuid();
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}
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2006-09-14 06:01:41 +00:00
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int Process::GetCurrentGroupId() {
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2005-04-21 16:12:57 +00:00
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return getgid();
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}
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2012-04-11 15:35:36 +00:00
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#if defined(HAVE_MACH_MACH_H) && !defined(__GNU__)
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2008-04-12 00:47:46 +00:00
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#include <mach/mach.h>
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#endif
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2004-12-27 06:17:27 +00:00
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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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2006-05-14 18:53:09 +00:00
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setrlimit(RLIMIT_CORE, &rlim);
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2004-12-27 06:17:27 +00:00
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#endif
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2006-09-14 06:01:41 +00:00
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2012-04-11 15:35:36 +00:00
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#if defined(HAVE_MACH_MACH_H) && !defined(__GNU__)
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2008-04-12 00:47:46 +00:00
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// Disable crash reporting on Mac OS X 10.0-10.4
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// get information about the original set of exception ports for the task
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mach_msg_type_number_t Count = 0;
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exception_mask_t OriginalMasks[EXC_TYPES_COUNT];
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exception_port_t OriginalPorts[EXC_TYPES_COUNT];
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exception_behavior_t OriginalBehaviors[EXC_TYPES_COUNT];
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thread_state_flavor_t OriginalFlavors[EXC_TYPES_COUNT];
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2010-11-29 18:16:10 +00:00
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kern_return_t err =
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2008-04-12 00:47:46 +00:00
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task_get_exception_ports(mach_task_self(), EXC_MASK_ALL, OriginalMasks,
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&Count, OriginalPorts, OriginalBehaviors,
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OriginalFlavors);
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if (err == KERN_SUCCESS) {
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// replace each with MACH_PORT_NULL.
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for (unsigned i = 0; i != Count; ++i)
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2010-11-29 18:16:10 +00:00
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task_set_exception_ports(mach_task_self(), OriginalMasks[i],
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2008-04-12 00:47:46 +00:00
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MACH_PORT_NULL, OriginalBehaviors[i],
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OriginalFlavors[i]);
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}
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// Disable crash reporting on Mac OS X 10.5
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2008-03-31 22:19:25 +00:00
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signal(SIGABRT, _exit);
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signal(SIGILL, _exit);
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signal(SIGFPE, _exit);
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signal(SIGSEGV, _exit);
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signal(SIGBUS, _exit);
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2006-09-14 06:01:41 +00:00
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#endif
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2004-12-27 06:17:27 +00:00
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}
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2004-12-20 00:59:28 +00:00
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2005-01-01 22:29:26 +00:00
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bool Process::StandardInIsUserInput() {
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2009-09-11 20:46:33 +00:00
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return FileDescriptorIsDisplayed(STDIN_FILENO);
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2005-01-01 22:29:26 +00:00
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}
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bool Process::StandardOutIsDisplayed() {
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2009-09-11 20:46:33 +00:00
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return FileDescriptorIsDisplayed(STDOUT_FILENO);
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2005-01-01 22:29:26 +00:00
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}
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bool Process::StandardErrIsDisplayed() {
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2009-09-11 20:46:33 +00:00
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return FileDescriptorIsDisplayed(STDERR_FILENO);
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}
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bool Process::FileDescriptorIsDisplayed(int fd) {
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2005-01-01 22:29:26 +00:00
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#if HAVE_ISATTY
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2009-09-11 20:46:33 +00:00
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return isatty(fd);
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2009-09-06 10:53:22 +00:00
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#else
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2005-01-01 22:29:26 +00:00
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// If we don't have isatty, just return false.
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return false;
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2009-09-06 10:53:22 +00:00
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#endif
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2005-01-01 22:29:26 +00:00
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}
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2009-05-11 18:05:52 +00:00
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static unsigned getColumns(int FileID) {
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// If COLUMNS is defined in the environment, wrap to that many columns.
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if (const char *ColumnsStr = std::getenv("COLUMNS")) {
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int Columns = std::atoi(ColumnsStr);
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if (Columns > 0)
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return Columns;
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}
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unsigned Columns = 0;
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2009-05-18 17:21:34 +00:00
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#if defined(HAVE_SYS_IOCTL_H) && defined(HAVE_TERMIOS_H)
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2009-05-11 18:05:52 +00:00
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// Try to determine the width of the terminal.
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struct winsize ws;
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if (ioctl(FileID, TIOCGWINSZ, &ws) == 0)
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Columns = ws.ws_col;
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#endif
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return Columns;
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}
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unsigned Process::StandardOutColumns() {
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if (!StandardOutIsDisplayed())
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return 0;
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return getColumns(1);
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}
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unsigned Process::StandardErrColumns() {
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if (!StandardErrIsDisplayed())
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return 0;
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return getColumns(2);
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}
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2009-06-04 07:09:50 +00:00
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2013-08-07 08:47:36 +00:00
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static bool terminalHasColors(int fd) {
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#ifdef HAVE_CURSES
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// First, acquire a global lock because the curses C routines are thread
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// hostile.
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static sys::Mutex M;
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MutexGuard G(M);
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int errret = 0;
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if (setupterm((char *)0, fd, &errret) != OK)
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// Regardless of why, if we can't get terminfo, we shouldn't try to print
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// colors.
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return false;
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// Test whether the terminal as set up supports color output.
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if (has_colors() == TRUE)
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return true;
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#endif
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// Otherwise, be conservative.
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2009-06-04 07:09:50 +00:00
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return false;
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}
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2012-07-20 18:29:38 +00:00
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bool Process::FileDescriptorHasColors(int fd) {
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// A file descriptor has colors if it is displayed and the terminal has
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// colors.
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2013-08-07 08:47:36 +00:00
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return FileDescriptorIsDisplayed(fd) && terminalHasColors(fd);
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2012-07-20 18:29:38 +00:00
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}
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2009-06-04 07:09:50 +00:00
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bool Process::StandardOutHasColors() {
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2012-07-20 18:29:38 +00:00
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return FileDescriptorHasColors(STDOUT_FILENO);
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2009-06-04 07:09:50 +00:00
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}
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bool Process::StandardErrHasColors() {
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2012-07-20 18:29:38 +00:00
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return FileDescriptorHasColors(STDERR_FILENO);
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2009-06-04 07:09:50 +00:00
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}
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bool Process::ColorNeedsFlush() {
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// No, we use ANSI escape sequences.
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|
|
|
return false;
|
|
|
|
}
|
|
|
|
|
|
|
|
#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)\
|
|
|
|
}
|
|
|
|
|
2009-12-23 17:48:10 +00:00
|
|
|
static const char colorcodes[2][2][8][10] = {
|
2009-06-04 07:09:50 +00:00
|
|
|
{ ALLCOLORS("3",""), ALLCOLORS("3","1;") },
|
|
|
|
{ ALLCOLORS("4",""), ALLCOLORS("4","1;") }
|
|
|
|
};
|
|
|
|
|
|
|
|
const char *Process::OutputColor(char code, bool bold, bool bg) {
|
|
|
|
return colorcodes[bg?1:0][bold?1:0][code&7];
|
|
|
|
}
|
|
|
|
|
|
|
|
const char *Process::OutputBold(bool bg) {
|
|
|
|
return "\033[1m";
|
|
|
|
}
|
|
|
|
|
2012-04-16 08:56:50 +00:00
|
|
|
const char *Process::OutputReverse() {
|
|
|
|
return "\033[7m";
|
|
|
|
}
|
|
|
|
|
2009-06-04 07:09:50 +00:00
|
|
|
const char *Process::ResetColor() {
|
|
|
|
return "\033[0m";
|
|
|
|
}
|
2012-05-06 08:24:18 +00:00
|
|
|
|
2012-05-06 08:24:24 +00:00
|
|
|
#if !defined(HAVE_ARC4RANDOM)
|
|
|
|
static unsigned GetRandomNumberSeed() {
|
2012-05-08 20:38:00 +00:00
|
|
|
// Attempt to get the initial seed from /dev/urandom, if possible.
|
|
|
|
if (FILE *RandomSource = ::fopen("/dev/urandom", "r")) {
|
|
|
|
unsigned seed;
|
|
|
|
int count = ::fread((void *)&seed, sizeof(seed), 1, RandomSource);
|
2012-05-06 08:24:24 +00:00
|
|
|
::fclose(RandomSource);
|
2012-05-08 20:38:00 +00:00
|
|
|
|
|
|
|
// Return the seed if the read was successful.
|
|
|
|
if (count == 1)
|
|
|
|
return seed;
|
2012-05-06 08:24:24 +00:00
|
|
|
}
|
2012-05-08 20:38:00 +00:00
|
|
|
|
|
|
|
// Otherwise, swizzle the current time and the process ID to form a reasonable
|
|
|
|
// seed.
|
2012-12-31 11:45:20 +00:00
|
|
|
TimeValue Now = TimeValue::now();
|
2012-05-08 20:38:00 +00:00
|
|
|
return hash_combine(Now.seconds(), Now.nanoseconds(), ::getpid());
|
2012-05-06 08:24:24 +00:00
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
2012-05-06 08:24:18 +00:00
|
|
|
unsigned llvm::sys::Process::GetRandomNumber() {
|
|
|
|
#if defined(HAVE_ARC4RANDOM)
|
|
|
|
return arc4random();
|
|
|
|
#else
|
2012-05-06 08:24:24 +00:00
|
|
|
static int x = (::srand(GetRandomNumberSeed()), 0);
|
|
|
|
(void)x;
|
2012-05-06 08:24:18 +00:00
|
|
|
return ::rand();
|
|
|
|
#endif
|
|
|
|
}
|