libs/minisat/System.cc

   1 #ifndef __STDC_FORMAT_MACROS
   2 #define __STDC_FORMAT_MACROS
   3 #endif
   4 #ifndef __STDC_LIMIT_MACROS
   5 #define __STDC_LIMIT_MACROS
   6 #endif
   7 /***************************************************************************************[System.cc]
   8 Copyright (c) 2003-2006, Niklas Een, Niklas Sorensson
   9 Copyright (c) 2007-2010, Niklas Sorensson
  10
  11 Permission is hereby granted, free of charge, to any person obtaining a copy of this software and
  12 associated documentation files (the "Software"), to deal in the Software without restriction,
  13 including without limitation the rights to use, copy, modify, merge, publish, distribute,
  14 sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
  15 furnished to do so, subject to the following conditions:
  16
  17 The above copyright notice and this permission notice shall be included in all copies or
  18 substantial portions of the Software.
  19
  20 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT
  21 NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  22 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
  23 DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT
  24 OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25 **************************************************************************************************/
  26
  27 #include <signal.h>
  28 #include <stdio.h>
  29
  30 #include "System.h"
  31
  32 #if defined(__linux__)
  33
  34 #include <stdlib.h>
  35
  36 using namespace Minisat;
  37
  38 static inline int memReadStat(int field)
  39 {
  40     char  name[256];
  41     pid_t pid = getpid();
  42     int   value;
  43
  44     sprintf(name, "/proc/%d/statm", pid);
  45     FILE* in = fopen(name, "rb");
  46     if (in == NULL) return 0;
  47
  48     for (; field >= 0; field--)
  49         if (fscanf(in, "%d", &value) != 1)
  50             printf("ERROR! Failed to parse memory statistics from \"/proc\".\n"), exit(1);
  51     fclose(in);
  52     return value;
  53 }
  54
  55
  56 static inline int memReadPeak(void)
  57 {
  58     char  name[256];
  59     pid_t pid = getpid();
  60
  61     sprintf(name, "/proc/%d/status", pid);
  62     FILE* in = fopen(name, "rb");
  63     if (in == NULL) return 0;
  64
  65     // Find the correct line, beginning with "VmPeak:":
  66     int peak_kb = 0;
  67     while (!feof(in) && fscanf(in, "VmPeak: %d kB", &peak_kb) != 1)
  68         while (!feof(in) && fgetc(in) != '\n')
  69             ;
  70     fclose(in);
  71
  72     return peak_kb;
  73 }
  74
  75 double Minisat::memUsed() { return (double)memReadStat(0) * (double)getpagesize() / (1024*1024); }
  76 double Minisat::memUsedPeak(bool strictlyPeak) {
  77     double peak = memReadPeak() / (double)1024;
  78     return peak == 0 && !strictlyPeak ? memUsed() : peak; }
  79
  80 #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__gnu_hurd__)
  81
  82 double Minisat::memUsed() {
  83     struct rusage ru;
  84     getrusage(RUSAGE_SELF, &ru);
  85     return (double)ru.ru_maxrss / 1024; }
  86 double Minisat::memUsedPeak(bool) { return memUsed(); }
  87
  88
  89 #elif defined(__APPLE__)
  90 #include <malloc/malloc.h>
  91
  92 double Minisat::memUsed() {
  93     malloc_statistics_t t;
  94     malloc_zone_statistics(NULL, &t);
  95     return (double)t.max_size_in_use / (1024*1024); }
  96 double Minisat::memUsedPeak(bool) { return memUsed(); }
  97
  98 #else
  99 double Minisat::memUsed()     { return 0; }
 100 double Minisat::memUsedPeak(bool) { return 0; }
 101 #endif
 102
 103
 104 #if !defined(_MSC_VER) && !defined(__MINGW32__) && !defined(__wasm)
 105 void Minisat::limitMemory(uint64_t max_mem_mb)
 106 {
 107 // FIXME: OpenBSD does not support RLIMIT_AS. Not sure how well RLIMIT_DATA works instead.
 108 #if defined(__OpenBSD__)
 109 #define RLIMIT_AS RLIMIT_DATA
 110 #endif
 111
 112     // Set limit on virtual memory:
 113     if (max_mem_mb != 0){
 114         rlim_t new_mem_lim = (rlim_t)max_mem_mb * 1024*1024;
 115         rlimit rl;
 116         getrlimit(RLIMIT_AS, &rl);
 117         if (rl.rlim_max == RLIM_INFINITY || new_mem_lim < rl.rlim_max){
 118             rl.rlim_cur = new_mem_lim;
 119             if (setrlimit(RLIMIT_AS, &rl) == -1)
 120                 printf("WARNING! Could not set resource limit: Virtual memory.\n");
 121         }
 122     }
 123
 124 #if defined(__OpenBSD__)
 125 #undef RLIMIT_AS
 126 #endif
 127 }
 128 #else
 129 void Minisat::limitMemory(uint64_t /*max_mem_mb*/)
 130 {
 131     printf("WARNING! Memory limit not supported on this architecture.\n");
 132 }
 133 #endif
 134
 135
 136 #if !defined(_MSC_VER) && !defined(__MINGW32__) && !defined(__wasm)
 137 void Minisat::limitTime(uint32_t max_cpu_time)
 138 {
 139     if (max_cpu_time != 0){
 140         rlimit rl;
 141         getrlimit(RLIMIT_CPU, &rl);
 142         if (rl.rlim_max == RLIM_INFINITY || (rlim_t)max_cpu_time < rl.rlim_max){
 143             rl.rlim_cur = max_cpu_time;
 144             if (setrlimit(RLIMIT_CPU, &rl) == -1)
 145                 printf("WARNING! Could not set resource limit: CPU-time.\n");
 146         }
 147     }
 148 }
 149 #else
 150 void Minisat::limitTime(uint32_t /*max_cpu_time*/)
 151 {
 152     printf("WARNING! CPU-time limit not supported on this architecture.\n");
 153 }
 154 #endif
 155
 156
 157 void Minisat::sigTerm(void handler(int))
 158 {
 159 #if defined(__wasm)
 160     (void)handler;
 161 #else
 162     signal(SIGINT, handler);
 163     signal(SIGTERM,handler);
 164 #ifdef SIGXCPU
 165     signal(SIGXCPU,handler);
 166 #endif
 167 #endif
 168 }