Import guile-1.8 as multiple upstream tarball component

[lilypond.git] / guile18 / libguile / stackchk.c

diff --git a/guile18/libguile/stackchk.c b/guile18/libguile/stackchk.c
new file mode 100644 (file)
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--- /dev/null
+++ b/guile18/libguile/stackchk.c
@@ -0,0 +1,103 @@
+/*     Copyright (C) 1995,1996,1997, 2000, 2001, 2006, 2008 Free Software Foundation, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+
+\f
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include "libguile/_scm.h"
+#include "libguile/ports.h"
+#include "libguile/root.h"
+#include "libguile/threads.h"
+
+#include "libguile/stackchk.h"
+\f
+
+/* {Stack Checking}
+ */
+
+#ifdef STACK_CHECKING
+int scm_stack_checking_enabled_p;
+
+SCM_SYMBOL (scm_stack_overflow_key, "stack-overflow");
+
+void
+scm_report_stack_overflow ()
+{
+  scm_stack_checking_enabled_p = 0;
+  scm_error (scm_stack_overflow_key,
+            NULL,
+            "Stack overflow",
+            SCM_BOOL_F,
+            SCM_BOOL_F);
+}
+
+#endif
+
+long
+scm_stack_size (SCM_STACKITEM *start)
+{
+  SCM_STACKITEM stack;
+#if SCM_STACK_GROWS_UP
+  return &stack - start;
+#else
+  return start - &stack;
+#endif /* SCM_STACK_GROWS_UP */
+}
+
+
+void 
+scm_stack_report ()
+{
+  SCM port = scm_current_error_port ();
+  SCM_STACKITEM stack;
+  scm_i_thread *thread = SCM_I_CURRENT_THREAD;
+
+  scm_uintprint ((scm_stack_size (thread->continuation_base) 
+                 * sizeof (SCM_STACKITEM)),
+                16, port);
+  scm_puts (" of stack: 0x", port);
+  scm_uintprint ((scm_t_bits) thread->continuation_base, 16, port);
+  scm_puts (" - 0x", port);
+  scm_uintprint ((scm_t_bits) &stack, 16, port);
+  scm_puts ("\n", port);
+}
+
+
+SCM_DEFINE (scm_sys_get_stack_size, "%get-stack-size", 0, 0, 0,
+           (),
+           "Return the current thread's C stack size (in Scheme objects).")
+#define FUNC_NAME s_scm_sys_get_stack_size
+{
+  return scm_from_long (scm_stack_size (SCM_I_CURRENT_THREAD->base));
+}
+#undef FUNC_NAME
+
+
+void
+scm_init_stackchk ()
+{
+#include "libguile/stackchk.x"
+}
+
+/*
+  Local Variables:
+  c-file-style: "gnu"
+  End:
+*/