binutils-gdb/libiberty/physmem.c

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/* Calculate the size of physical memory.
Copyright (C) 2000-2019 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
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/* Written by Paul Eggert. */
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#if HAVE_CONFIG_H
# include <config.h>
#endif
#if HAVE_UNISTD_H
# include <unistd.h>
#endif
#if HAVE_SYS_PSTAT_H
# include <sys/pstat.h>
#endif
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#if HAVE_SYS_SYSMP_H
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# include <sys/sysmp.h>
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#endif
#if HAVE_SYS_SYSINFO_H && HAVE_MACHINE_HAL_SYSINFO_H
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# include <sys/sysinfo.h>
# include <machine/hal_sysinfo.h>
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#endif
#if HAVE_SYS_TABLE_H
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# include <sys/table.h>
#endif
#include <sys/types.h>
#if HAVE_SYS_PARAM_H
# include <sys/param.h>
#endif
#if HAVE_SYS_SYSCTL_H
# include <sys/sysctl.h>
#endif
#if HAVE_SYS_SYSTEMCFG_H
# include <sys/systemcfg.h>
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#endif
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#ifdef _WIN32
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# define WIN32_LEAN_AND_MEAN
# include <windows.h>
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/* MEMORYSTATUSEX is missing from older windows headers, so define
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a local replacement. */
typedef struct
{
DWORD dwLength;
DWORD dwMemoryLoad;
DWORDLONG ullTotalPhys;
DWORDLONG ullAvailPhys;
DWORDLONG ullTotalPageFile;
DWORDLONG ullAvailPageFile;
DWORDLONG ullTotalVirtual;
DWORDLONG ullAvailVirtual;
DWORDLONG ullAvailExtendedVirtual;
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} lMEMORYSTATUSEX;
typedef WINBOOL (WINAPI *PFN_MS_EX) (lMEMORYSTATUSEX*);
#endif
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#include "libiberty.h"
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/* Return the total amount of physical memory. */
double
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physmem_total (void)
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{
#if defined _SC_PHYS_PAGES && defined _SC_PAGESIZE
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{ /* This works on linux-gnu, solaris2 and cygwin. */
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double pages = sysconf (_SC_PHYS_PAGES);
double pagesize = sysconf (_SC_PAGESIZE);
if (0 <= pages && 0 <= pagesize)
return pages * pagesize;
}
#endif
#if HAVE_PSTAT_GETSTATIC
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{ /* This works on hpux11. */
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struct pst_static pss;
if (0 <= pstat_getstatic (&pss, sizeof pss, 1, 0))
{
double pages = pss.physical_memory;
double pagesize = pss.page_size;
if (0 <= pages && 0 <= pagesize)
return pages * pagesize;
}
}
#endif
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#if HAVE_SYSMP && defined MP_SAGET && defined MPSA_RMINFO && defined _SC_PAGESIZE
{ /* This works on irix6. */
struct rminfo realmem;
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if (sysmp (MP_SAGET, MPSA_RMINFO, &realmem, sizeof realmem) == 0)
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{
double pagesize = sysconf (_SC_PAGESIZE);
double pages = realmem.physmem;
if (0 <= pages && 0 <= pagesize)
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return pages * pagesize;
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}
}
#endif
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#if HAVE_GETSYSINFO && defined GSI_PHYSMEM
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{ /* This works on Tru64 UNIX V4/5. */
int physmem;
if (getsysinfo (GSI_PHYSMEM, (caddr_t) &physmem, sizeof (physmem),
NULL, NULL, NULL) == 1)
{
double kbytes = physmem;
if (0 <= kbytes)
return kbytes * 1024.0;
}
}
#endif
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#if HAVE_SYSCTL && defined HW_PHYSMEM
{ /* This works on *bsd and darwin. */
unsigned int physmem;
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size_t len = sizeof physmem;
static int mib[2] = { CTL_HW, HW_PHYSMEM };
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if (sysctl (mib, ARRAY_SIZE (mib), &physmem, &len, NULL, 0) == 0
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&& len == sizeof (physmem))
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return (double) physmem;
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}
#endif
#if HAVE__SYSTEM_CONFIGURATION
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/* This works on AIX 4.3.3+. */
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return _system_configuration.physmem;
#endif
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#if defined _WIN32
{ /* this works on windows */
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PFN_MS_EX pfnex;
HMODULE h = GetModuleHandle ("kernel32.dll");
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if (!h)
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return 0.0;
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/* Use GlobalMemoryStatusEx if available. */
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if ((pfnex = (PFN_MS_EX) GetProcAddress (h, "GlobalMemoryStatusEx")))
{
lMEMORYSTATUSEX lms_ex;
lms_ex.dwLength = sizeof lms_ex;
if (!pfnex (&lms_ex))
return 0.0;
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return (double) lms_ex.ullTotalPhys;
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}
/* Fall back to GlobalMemoryStatus which is always available.
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but returns wrong results for physical memory > 4GB. */
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else
{
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MEMORYSTATUS ms;
GlobalMemoryStatus (&ms);
return (double) ms.dwTotalPhys;
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}
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}
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#endif
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/* Return 0 if we can't determine the value. */
return 0;
}
/* Return the amount of physical memory available. */
double
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physmem_available (void)
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{
#if defined _SC_AVPHYS_PAGES && defined _SC_PAGESIZE
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{ /* This works on linux-gnu, solaris2 and cygwin. */
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double pages = sysconf (_SC_AVPHYS_PAGES);
double pagesize = sysconf (_SC_PAGESIZE);
if (0 <= pages && 0 <= pagesize)
return pages * pagesize;
}
#endif
#if HAVE_PSTAT_GETSTATIC && HAVE_PSTAT_GETDYNAMIC
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{ /* This works on hpux11. */
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struct pst_static pss;
struct pst_dynamic psd;
if (0 <= pstat_getstatic (&pss, sizeof pss, 1, 0)
&& 0 <= pstat_getdynamic (&psd, sizeof psd, 1, 0))
{
double pages = psd.psd_free;
double pagesize = pss.page_size;
if (0 <= pages && 0 <= pagesize)
return pages * pagesize;
}
}
#endif
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#if HAVE_SYSMP && defined MP_SAGET && defined MPSA_RMINFO && defined _SC_PAGESIZE
{ /* This works on irix6. */
struct rminfo realmem;
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if (sysmp (MP_SAGET, MPSA_RMINFO, &realmem, sizeof realmem) == 0)
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{
double pagesize = sysconf (_SC_PAGESIZE);
double pages = realmem.availrmem;
if (0 <= pages && 0 <= pagesize)
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return pages * pagesize;
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}
}
#endif
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#if HAVE_TABLE && defined TBL_VMSTATS
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{ /* This works on Tru64 UNIX V4/5. */
struct tbl_vmstats vmstats;
if (table (TBL_VMSTATS, 0, &vmstats, 1, sizeof (vmstats)) == 1)
{
double pages = vmstats.free_count;
double pagesize = vmstats.pagesize;
if (0 <= pages && 0 <= pagesize)
return pages * pagesize;
}
}
#endif
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#if HAVE_SYSCTL && defined HW_USERMEM
{ /* This works on *bsd and darwin. */
unsigned int usermem;
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size_t len = sizeof usermem;
static int mib[2] = { CTL_HW, HW_USERMEM };
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if (sysctl (mib, ARRAY_SIZE (mib), &usermem, &len, NULL, 0) == 0
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&& len == sizeof (usermem))
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return (double) usermem;
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}
#endif
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#if defined _WIN32
{ /* this works on windows */
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PFN_MS_EX pfnex;
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HMODULE h = GetModuleHandle ("kernel32.dll");
if (!h)
return 0.0;
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/* Use GlobalMemoryStatusEx if available. */
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if ((pfnex = (PFN_MS_EX) GetProcAddress (h, "GlobalMemoryStatusEx")))
{
lMEMORYSTATUSEX lms_ex;
lms_ex.dwLength = sizeof lms_ex;
if (!pfnex (&lms_ex))
return 0.0;
return (double) lms_ex.ullAvailPhys;
}
/* Fall back to GlobalMemoryStatus which is always available.
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but returns wrong results for physical memory > 4GB */
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else
{
MEMORYSTATUS ms;
GlobalMemoryStatus (&ms);
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return (double) ms.dwAvailPhys;
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}
}
#endif
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/* Guess 25% of physical memory. */
return physmem_total () / 4;
}
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#if DEBUG
# include <stdio.h>
# include <stdlib.h>
int
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main (void)
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{
printf ("%12.f %12.f\n", physmem_total (), physmem_available ());
exit (0);
}
#endif /* DEBUG */
/*
Local Variables:
compile-command: "gcc -DDEBUG -DHAVE_CONFIG_H -I.. -g -O -Wall -W physmem.c"
End:
*/