Changeset 14199

Timestamp:

Aug 18, 2010, 5:41:02 AM (14 years ago)

Author:

Gary Byers

Message:

Free the (separate) signal stack on thread exit on ARM Linux.

File:

• trunk/source/lisp-kernel/thread_manager.c (modified) (1 diff)

trunk/source/lisp-kernel/thread_manager.c

@@ -1434 +1434 @@
       condemn_area_holding_area_lock(cs);
     }
+    /* On some platforms - currently just linuxarm - we have to
+       allocate a separate alternate signal stack (rather than just
+       using a few pages of the thread's main stack.)  Disable and
+       free that alternate stack here.
+    */
+#ifdef ARM
+#if defined(LINUX)
+    {
+      stack_t new, current;
+      new.ss_flags = SS_DISABLE;
+      if (sigaltstack(&new, &current) == 0) {
+        munmap(current.ss_sp, current.ss_size);
+      }
+    }
+#endif
+#endif
     destroy_semaphore(&tcr->suspend);
     destroy_semaphore(&tcr->resume);