new smatch

@@ -1,7 +1,8 @@
 /*
  * Copyright (C) 2018 Oracle.
+ * Copyright 2019 Joyent, Inc.
  *
  * 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
  * of the License, or (at your option) any later version.

@@ -16,19 +17,22 @@
  */
 
 #include "smatch.h"
 #include <fcntl.h>
 #include <unistd.h>
+#ifdef __sun
 #include <sys/procfs.h>
+#endif
 
 static int my_id;
-static int my_fd = -2;
 
 static unsigned long max_size;
 
+#ifdef __sun
 unsigned long get_mem_kb(void)
 {
+        static int my_fd = -2;
         prpsinfo_t pbuf;
 
         if (my_fd == -2) {
                 /* Do not repeatedly attempt this if it fails. */
                 my_fd = open("/proc/self/psinfo", O_RDONLY);

@@ -41,11 +45,29 @@
                 return (0);
         }
 
         return (pbuf.pr_rssize);
 }
+#else
+unsigned long get_mem_kb(void)
+{
+        FILE *file;
+        char buf[1024] = "0";
+        unsigned long size;
 
+        file = fopen("/proc/self/statm", "r");
+        if (!file)
+                return 0;
+        fread(buf, 1, sizeof(buf), file);
+        fclose(file);
+
+        size = strtoul(buf, NULL, 10);
+        size = size * sysconf(_SC_PAGESIZE) / 1024;
+        return size;
+}
+#endif
+
 static void match_end_func(struct symbol *sym)
 {
         unsigned long size;
 
         if (option_mem) {