[Mono-dev] Better way of getting stack size and base on OpenBSD

[Robert Nagy]

Index: mono/metadata/threads.c
===================================================================
--- mono/metadata/threads.c     (revision 154749)
+++ mono/metadata/threads.c     (working copy)
@@ -16,6 +16,11 @@
 #include <signal.h>
 #include <string.h>
 
+#if defined(__OpenBSD__)
+#include <pthread.h>
+#include <pthread_np.h>
+#endif
+
 #include <mono/metadata/object.h>
 #include <mono/metadata/domain-internals.h>
 #include <mono/metadata/profiler-private.h>
@@ -932,6 +937,15 @@
 #    elif defined(sun)
        *staddr = NULL;
        pthread_attr_getstacksize (&attr, &stsize);
+#    elif defined(__OpenBSD__)
+       stack_t ss;
+       int rslt;
+
+       rslt = pthread_stackseg_np(pthread_self(), &ss);
+       g_assert (rslt == 0);
+
+       *staddr = (guint8*)((size_t)ss.ss_sp - ss.ss_size);
+       *stsize = ss.ss_size;
 #    else
        *staddr = NULL;
        *stsize = 0;
@@ -939,8 +953,10 @@
 #    endif
 #  endif
 
-#  ifndef sun
+#  if !defined(sun)
+#    if !defined(__OpenBSD__)
        pthread_attr_getstack (&attr, (void**)staddr, stsize);
+#    endif
        if (*staddr)
                g_assert ((current > *staddr) && (current < *staddr + *stsize));
 #  endif