turn on GC

extlib/benz/gc.c

@@ -390,6 +390,8 @@ gc_mark_object(pic_state *pic, struct pic_object *obj)
     }
     if (pic_proc_irep_p(proc)) {
       gc_mark_object(pic, (struct pic_object *)proc->u.irep);
+    } else {
+      gc_mark_object(pic, (struct pic_object *)proc->u.func.name);
     }
     break;
   }
@@ -398,6 +400,7 @@ gc_mark_object(pic_state *pic, struct pic_object *obj)
   }
   case PIC_TT_ERROR: {
     struct pic_error *err = (struct pic_error *)obj;
+    gc_mark_object(pic, (struct pic_object *)err->type);
     gc_mark_object(pic, (struct pic_object *)err->msg);
     gc_mark(pic, err->irrs);
     gc_mark_object(pic, (struct pic_object *)err->stack);
@@ -443,6 +446,9 @@ gc_mark_object(pic_state *pic, struct pic_object *obj)
     for (i = 0; i < irep->plen; ++i) {
       gc_mark(pic, irep->pool[i]);
     }
+    for (i = 0; i < irep->slen; ++i) {
+      gc_mark_object(pic, (struct pic_object *)irep->syms[i]);
+    }
     break;
   }
   case PIC_TT_DATA: {
@@ -462,6 +468,7 @@ gc_mark_object(pic_state *pic, struct pic_object *obj)
     xh_entry *it;
 
     for (it = xh_begin(&dict->hash); it != NULL; it = xh_next(it)) {
+      gc_mark_object(pic, (struct pic_object *)xh_key(it, pic_sym));
       gc_mark(pic, xh_val(it, pic_value));
     }
     break;
@@ -516,6 +523,28 @@ gc_mark_trie(pic_state *pic, struct pic_trie *trie)
   }
 }
 
+#define M(x) gc_mark_object(pic, (struct pic_object *)pic->x)
+
+static void
+gc_mark_global_symbols(pic_state *pic)
+{
+  M(sDEFINE); M(sLAMBDA); M(sIF); M(sBEGIN); M(sQUOTE); M(sSETBANG);
+  M(sQUASIQUOTE); M(sUNQUOTE); M(sUNQUOTE_SPLICING);
+  M(sDEFINE_SYNTAX); M(sIMPORT); M(sEXPORT);
+  M(sDEFINE_LIBRARY); M(sIN_LIBRARY);
+  M(sCOND_EXPAND); M(sAND); M(sOR); M(sELSE); M(sLIBRARY);
+  M(sONLY); M(sRENAME); M(sPREFIX); M(sEXCEPT);
+  M(sCONS); M(sCAR); M(sCDR); M(sNILP);
+  M(sSYMBOL_P); M(sPAIR_P);
+  M(sADD); M(sSUB); M(sMUL); M(sDIV); M(sMINUS);
+  M(sEQ); M(sLT); M(sLE); M(sGT); M(sGE); M(sNOT);
+  M(sREAD); M(sFILE);
+  M(rDEFINE); M(rLAMBDA); M(rIF); M(rBEGIN); M(rQUOTE); M(rSETBANG);
+  M(rDEFINE_SYNTAX); M(rIMPORT); M(rEXPORT);
+  M(rDEFINE_LIBRARY); M(rIN_LIBRARY);
+  M(rCOND_EXPAND);
+}
+
 static void
 gc_mark_phase(pic_state *pic)
 {
@@ -553,6 +582,13 @@ gc_mark_phase(pic_state *pic)
     gc_mark_object(pic, pic->arena[j]);
   }
 
+  gc_mark_global_symbols(pic);
+
+  /* symbol table */
+  for (it = xh_begin(&pic->syms); it != NULL; it = xh_next(it)) {
+    gc_mark_object(pic, (struct pic_object *)xh_val(it, pic_sym));
+  }
+
   /* global variables */
   if (pic->globals) {
     gc_mark_object(pic, (struct pic_object *)pic->globals);
@@ -814,7 +850,7 @@ pic_obj_alloc_unsafe(pic_state *pic, size_t size, enum pic_tt tt)
 
   obj = (struct pic_object *)gc_alloc(pic, size);
   if (obj == NULL) {
-    /* pic_gc_run(pic); */
+    pic_gc_run(pic);
     obj = (struct pic_object *)gc_alloc(pic, size);
     if (obj == NULL) {
       add_heap_page(pic);

extlib/benz/state.c

@@ -202,6 +202,11 @@ pic_close(pic_state *pic)
     pic->wind = pic->wind->prev;
   }
 
+  /* free symbol names */
+  for (it = xh_begin(&pic->syms); it != NULL; it = xh_next(it)) {
+    free(xh_key(it, char *));
+  }
+
   /* clear out root objects */
   pic->sp = pic->stbase;
   pic->ci = pic->cibase;
@@ -210,6 +215,7 @@ pic_close(pic_state *pic)
   pic->err = pic_undef_value();
   pic->globals = NULL;
   pic->macros = NULL;
+  xh_clear(&pic->syms);
   xh_clear(&pic->attrs);
   pic->features = pic_nil_value();
   pic->libs = pic_nil_value();
@@ -230,11 +236,6 @@ pic_close(pic_state *pic)
   pic_trie_delete(pic, pic->reader->trie);
   free(pic->reader);
 
-  /* free symbol names */
-  for (it = xh_begin(&pic->syms); it != NULL; it = xh_next(it)) {
-    free(xh_key(it, char *));
-  }
-
   /* free global stacks */
   xh_destroy(&pic->syms);
   xh_destroy(&pic->attrs);