drd/tests/concurrent_close: Add

git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13508

drd/tests/concurrent_close.cpp

@@ -0,0 +1,53 @@
+/*
+ * Reproducer for bug #323905. See also
+ * http://bugs.kde.org/show_bug.cgi?id=323905.
+ */
+
+#include <climits>    /* PTHREAD_STACK_MIN */
+#include <cstdio>     /* fprintf() */
+#include <fcntl.h>    /* O_RDONLY */
+#include <pthread.h>
+#include <unistd.h>   /* close() */
+
+/* Happens with two threads also */
+#define THREAD_COUNT 256
+
+void* thread(void*)
+{
+  int fd;
+
+  /* Happens with any file, not just /dev/null */
+  fd = open("/dev/null", O_RDONLY);
+  if (fd >= 0)
+    close(fd);
+  else
+    fprintf(stderr, "Failed to open /dev/null\n");
+  return 0;
+}
+
+int main()
+{
+  int i, r;
+  pthread_attr_t attr;
+  pthread_t threads[THREAD_COUNT];
+
+  pthread_attr_init(&attr);
+  pthread_attr_setstacksize(&attr, PTHREAD_STACK_MIN);
+  for (i = 0; i < THREAD_COUNT; ++i) {
+    r = pthread_create(&threads[i], &attr, thread, 0);
+    if (r != 0) {
+      fprintf(stderr, "Failed to create thread %d\n", i);
+      return 1;
+    }
+  }
+  pthread_attr_destroy(&attr);
+  for (i = 0; i < THREAD_COUNT; ++i) {
+    r = pthread_join(threads[i], 0);
+    if (r != 0) {
+      fprintf(stderr, "Failed to join thread %d\n", i);
+      return 1;
+    }
+  }
+  fprintf(stderr, "Done.\n");
+  return 0;
+}