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 #if !defined(__wasm)
  28 #include <signal.h>
  29 #endif
  30 #include <stdio.h>
  31
  32 #include "System.h"
  33
  34 #if defined(__linux__)
  35
  36 #include <stdlib.h>
  37
  38 using namespace Minisat;
  39
  40 static inline int memReadStat(int field)
  41 {
  42     char  name[256];
  43     pid_t pid = getpid();
  44     int   value;
  45
  46     sprintf(name, "/proc/%d/statm", pid);
  47     FILE* in = fopen(name, "rb");
  48     if (in == NULL) return 0;
  49
  50     for (; field >= 0; field--)
  51         if (fscanf(in, "%d", &value) != 1)
  52             printf("ERROR! Failed to parse memory statistics from \"/proc\".\n"), exit(1);
  53     fclose(in);
  54     return value;
  55 }
  56
  57
  58 static inline int memReadPeak(void)
  59 {
  60     char  name[256];
  61     pid_t pid = getpid();
  62
  63     sprintf(name, "/proc/%d/status", pid);
  64     FILE* in = fopen(name, "rb");
  65     if (in == NULL) return 0;
  66
  67     // Find the correct line, beginning with "VmPeak:":
  68     int peak_kb = 0;
  69     while (!feof(in) && fscanf(in, "VmPeak: %d kB", &peak_kb) != 1)
  70         while (!feof(in) && fgetc(in) != '\n')
  71             ;
  72     fclose(in);
  73
  74     return peak_kb;
  75 }
  76
  77 double Minisat::memUsed() { return (double)memReadStat(0) * (double)getpagesize() / (1024*1024); }
  78 double Minisat::memUsedPeak(bool strictlyPeak) {
  79     double peak = memReadPeak() / (double)1024;
  80     return peak == 0 && !strictlyPeak ? memUsed() : peak; }
  81
  82 #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__gnu_hurd__)
  83
  84 double Minisat::memUsed() {
  85     struct rusage ru;
  86     getrusage(RUSAGE_SELF, &ru);
  87     return (double)ru.ru_maxrss / 1024; }
  88 double Minisat::memUsedPeak(bool) { return memUsed(); }
  89
  90
  91 #elif defined(__APPLE__)
  92 #include <malloc/malloc.h>
  93
  94 double Minisat::memUsed() {
  95     malloc_statistics_t t;
  96     malloc_zone_statistics(NULL, &t);
  97     return (double)t.max_size_in_use / (1024*1024); }
  98 double Minisat::memUsedPeak(bool) { return memUsed(); }
  99
 100 #else
 101 double Minisat::memUsed()     { return 0; }
 102 double Minisat::memUsedPeak(bool) { return 0; }
 103 #endif
 104
 105
 106 #if !defined(_MSC_VER) && !defined(__MINGW32__) && !defined(__wasm)
 107 void Minisat::limitMemory(uint64_t max_mem_mb)
 108 {
 109 // FIXME: OpenBSD does not support RLIMIT_AS. Not sure how well RLIMIT_DATA works instead.
 110 #if defined(__OpenBSD__)
 111 #define RLIMIT_AS RLIMIT_DATA
 112 #endif
 113
 114     // Set limit on virtual memory:
 115     if (max_mem_mb != 0){
 116         rlim_t new_mem_lim = (rlim_t)max_mem_mb * 1024*1024;
 117         rlimit rl;
 118         getrlimit(RLIMIT_AS, &rl);
 119         if (rl.rlim_max == RLIM_INFINITY || new_mem_lim < rl.rlim_max){
 120             rl.rlim_cur = new_mem_lim;
 121             if (setrlimit(RLIMIT_AS, &rl) == -1)
 122                 printf("WARNING! Could not set resource limit: Virtual memory.\n");
 123         }
 124     }
 125
 126 #if defined(__OpenBSD__)
 127 #undef RLIMIT_AS
 128 #endif
 129 }
 130 #else
 131 void Minisat::limitMemory(uint64_t /*max_mem_mb*/)
 132 {
 133     printf("WARNING! Memory limit not supported on this architecture.\n");
 134 }
 135 #endif
 136
 137
 138 #if !defined(_MSC_VER) && !defined(__MINGW32__) && !defined(__wasm)
 139 void Minisat::limitTime(uint32_t max_cpu_time)
 140 {
 141     if (max_cpu_time != 0){
 142         rlimit rl;
 143         getrlimit(RLIMIT_CPU, &rl);
 144         if (rl.rlim_max == RLIM_INFINITY || (rlim_t)max_cpu_time < rl.rlim_max){
 145             rl.rlim_cur = max_cpu_time;
 146             if (setrlimit(RLIMIT_CPU, &rl) == -1)
 147                 printf("WARNING! Could not set resource limit: CPU-time.\n");
 148         }
 149     }
 150 }
 151 #else
 152 void Minisat::limitTime(uint32_t /*max_cpu_time*/)
 153 {
 154     printf("WARNING! CPU-time limit not supported on this architecture.\n");
 155 }
 156 #endif
 157
 158
 159 void Minisat::sigTerm(void handler(int))
 160 {
 161 #if defined(__wasm)
 162     (void)handler;
 163 #else
 164     signal(SIGINT, handler);
 165     signal(SIGTERM,handler);
 166 #ifdef SIGXCPU
 167     signal(SIGXCPU,handler);
 168 #endif
 169 #endif
 170 }