Add support in dbg.debug_obj for printing the obj body.

1 files changed, 12 insertions, 3 deletions

diff --git a/src/lib/dbg.rs b/src/lib/dbg.rs
index 195a693a..3aaf3add 100644
--- a/src/lib/dbg.rs
+++ b/src/lib/dbg.rs
@@ -9,7 +9,7 @@ native "rust" mod rustrt {
   fn debug_opaque[T](&T x);
   fn debug_box[T](@T x);
   fn debug_tag[T](&T x);
-  fn debug_obj[T](&T x, uint nmethods);
+  fn debug_obj[T](&T x, uint nmethods, uint nbytes);
   fn debug_fn[T](&T x);
 }
 
@@ -33,8 +33,17 @@ fn debug_tag[T](&T x) {
   rustrt.debug_tag[T](x);
 }
 
-fn debug_obj[T](&T x, uint nmethods) {
-  rustrt.debug_obj[T](x, nmethods);
+/**
+ * `nmethods` is the number of methods we expect the object to have.  The
+ * runtime will print this many words of the obj vtbl).
+ *
+ * `nbytes` is the number of bytes of body data we expect the object to have.
+ * The runtime will print this many bytes of the obj body.  You probably want
+ * this to at least be 4u, since an implicit captured tydesc pointer sits in
+ * the front of any obj's data tuple.x
+ */
+fn debug_obj[T](&T x, uint nmethods, uint nbytes) {
+  rustrt.debug_obj[T](x, nmethods, nbytes);
 }
 
 fn debug_fn[T](&T x) {