1 files changed, 14 insertions, 0 deletions
diff --git a/include/mruby.h b/include/mruby.h
index 1ea0156e8..33af08133 100644
--- a/include/mruby.h
+++ b/include/mruby.h
@@ -113,6 +113,14 @@ struct mrb_context {
 
 struct mrb_jmpbuf;
 
+typedef struct {
+  const char *filename;
+  int lineno;
+  struct RClass *klass;
+  const char *sep;
+  mrb_sym method_id;
+} mrb_backtrace_entry;
+
 typedef void (*mrb_atexit_func)(struct mrb_state*);
 
 typedef struct mrb_state {
@@ -125,6 +133,12 @@ typedef struct mrb_state {
   struct mrb_context *root_c;
 
   struct RObject *exc;                    /* exception */
+  struct {
+    struct RObject *exc;
+    int n;
+    int n_allocated;
+    mrb_backtrace_entry *entries;
+  } backtrace;
   struct iv_tbl *globals;                 /* global variable table */
 
   struct RObject *top_self;