mono/tests/gc-altstack.cs

   1 using System;
   2 using System.Threading;
   3 using System.Linq;
   4
   5 public class Tests
   6 {
   7         static bool finished = false;
   8
   9         static void fault () {
  10                 while (!finished) {
  11                         object o = null;
  12                         try {
  13                                 o.ToString ();
  14                         } catch {
  15                         }
  16                 }
  17         }
  18
  19         static void gc (int niter) {
  20                 int i = 0;
  21                 while (i < niter) {
  22                         i ++;
  23                         if (i % 100 == 0)
  24                                 Console.Write (".");
  25                         GC.Collect ();
  26                 }
  27                 finished = true;
  28                 Console.WriteLine ();
  29         }
  30
  31         static void test (bool main, int niter) {
  32                 finished = false;
  33
  34                 if (main) {
  35                         var t = new Thread (delegate () {
  36                                         gc (niter);
  37                                 });
  38                         t.Start ();
  39
  40                         fault ();
  41                 } else {
  42                         var t = new Thread (delegate () {
  43                                         fault ();
  44                                 });
  45                         t.Start ();
  46
  47                         gc (niter);
  48                 }
  49         }
  50
  51         public static void Main (String[] args) {
  52                 /* Test for running a GC while executing a SIGSEGV handler on an altstack */
  53                 int niter;
  54
  55                 if (args.Length > 0)
  56                         niter = Int32.Parse (args [0]);
  57                 else
  58                         niter = 1000;
  59
  60                 test (false, niter);
  61                 test (true, niter);
  62         }
  63 }
  64