Update attribute bound_no_checking

tcctok.h:
- Add CONFIG_TCC_BCHECK  arround TOK_NO_BOUND_CHECK1/TOK_NO_BOUND_CHECK2

tccgen.c:
- Add CONFIG_TCC_BCHECK  arround TOK_NO_BOUND_CHECK1/TOK_NO_BOUND_CHECK2
- Undo alias definition in tccpp.c when function bound checking if off

tests/tests2/114_bound_signal.c:
- Test alias undo
- fix sleep problem

tccgen.c

@@ -4124,10 +4124,12 @@ redo:
         case TOK_ALWAYS_INLINE2:
             ad->f.func_alwinl = 1;
             break;
+#ifdef CONFIG_TCC_BCHECK
         case TOK_NO_BOUND_CHECK1:
         case TOK_NO_BOUND_CHECK2:
             ad->f.no_bcheck = 1;
             break;
+#endif
         case TOK_SECTION1:
         case TOK_SECTION2:
             skip('(');
@@ -5960,6 +5962,26 @@ special_math_val:
         if (t < TOK_UIDENT)
             expect("identifier");
         s = sym_find(t);
+#ifdef CONFIG_TCC_BCHECK
+        /* HACK to undo alias definition in tccpp.c
+           if function has no bound checking */
+        if (tcc_state->do_bounds_check == 0 && s &&
+            (s->type.t & VT_BTYPE) == VT_FUNC && (s->asm_label & SYM_FIELD)) {
+            const char *name = get_tok_str(s->asm_label & ~SYM_FIELD, NULL);
+
+            if (name && strncmp (name, "__bound_", strlen("__bound_")) == 0) {
+                char str[100];
+                int v = s->v;
+
+                sprintf (str, "!%s", name); /* illegal name */
+                t = tok_alloc(str, strlen(str))->tok;
+                s = sym_find(t);
+                if (s == NULL)
+                    s = external_global_sym(t, &func_old_type);
+                s->asm_label = v | SYM_FIELD; /* use old name as alias */
+            }
+        }
+#endif
         if (!s || IS_ASM_SYM(s)) {
             const char *name = get_tok_str(t, NULL);
             if (tok != '(')
@@ -8087,14 +8109,13 @@ static void gen_function(Sym *sym)
 {
     /* Initialize VLA state */
     struct scope f = { 0 };
-    cur_scope = root_scope = &f;
 #ifdef CONFIG_TCC_BCHECK
     unsigned char save_bcheck = tcc_state->do_bounds_check;
 
     if (sym->type.ref->f.no_bcheck)
         tcc_state->do_bounds_check = 0;
 #endif
-
+    cur_scope = root_scope = &f;
     nocode_wanted = 0;
     ind = cur_text_section->data_offset;
     if (sym->a.aligned) {

tcctok.h

@@ -134,8 +134,10 @@
      DEF(TOK_DESTRUCTOR2, "__destructor__")
      DEF(TOK_ALWAYS_INLINE1, "always_inline")
      DEF(TOK_ALWAYS_INLINE2, "__always_inline__")
+#ifdef CONFIG_TCC_BCHECK
      DEF(TOK_NO_BOUND_CHECK1, "bound_no_checking")
      DEF(TOK_NO_BOUND_CHECK2, "__bound_no_checking__")
+#endif
 
      DEF(TOK_MODE, "__mode__")
      DEF(TOK_MODE_QI, "__QI__")

tests/tests2/114_bound_signal.c

@@ -33,6 +33,8 @@ add (void) BOUNDS_NO_CHECKING
     for (i = 0; i < (sizeof(dummy)/sizeof(dummy[0])); i++) {
         dummy[i]++;
     }
+    /* Should not be translated into __bound_memset */
+    memset (&dummy[0], 0, sizeof(dummy));
 }
 
 static void *
@@ -68,6 +70,7 @@ main (void)
     struct sigaction act;
     sigjmp_buf sj;
     sigset_t m;
+    time_t end;
 
     memset (&act, 0, sizeof (act));
     act.sa_handler = signal_handler;
@@ -80,7 +83,9 @@ main (void)
     pthread_create(&id2, NULL, do_signal, NULL);
 
     printf ("start\n");
-    sleep(1);
+    /* sleep does not work !!! */
+    end = time(NULL) + 2;
+    while (time(NULL) < end) ;
     run = 0;
     printf ("end\n");