1 files changed, 35 insertions, 0 deletions
diff --git a/ext/-test-/stack/stack.c b/ext/-test-/stack/stack.c
new file mode 100644
index 0000000000..f0e65e74b2
--- /dev/null
+++ b/ext/-test-/stack/stack.c
@@ -0,0 +1,35 @@
+#include "ruby.h"
+#include "internal/string.h"
+
+static VALUE
+stack_overflow(VALUE self)
+{
+    size_t i = 0;
+
+    while (1) {
+        // Allocate and touch memory to force actual stack usage:
+        volatile char *stack = alloca(1024);
+        stack[0] = (char)i;
+        stack[1023] = (char)i;
+        i++;
+    }
+
+    return Qnil;
+}
+
+static VALUE
+asan_p(VALUE klass)
+{
+#if defined(__SANITIZE_ADDRESS__) || __has_feature(address_sanitizer)
+    return Qtrue;
+#else
+    return Qfalse;
+#endif
+}
+
+void
+Init_stack(VALUE klass)
+{
+    rb_define_singleton_method(rb_cThread, "stack_overflow", stack_overflow, 0);
+    rb_define_singleton_method(rb_cThread, "asan?", asan_p, 0);
+}