Remove shadowed declarations, undefined identifiers, and specify argument types where it is required. (#1601)

JerryScript-DCO-1.0-Signed-off-by: Robert Sipka rsipka.uszeged@partner.samsung.com

26 files changed, 75 insertions, 82 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 29fe8e27..a8353740 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -179,7 +179,7 @@ jerry_add_compile_flags(-fno-stack-protector)
 endif()
 
 if (USING_GCC OR USING_CLANG)
-  jerry_add_compile_warnings(all extra format-nonliteral init-self conversion sign-conversion format-security missing-declarations)
+  jerry_add_compile_warnings(all extra format-nonliteral init-self conversion sign-conversion format-security missing-declarations shadow strict-prototypes undef)
   jerry_add_compile_flags(-Wno-stack-protector -Wno-attributes)
 endif()
 
diff --git a/jerry-core/ecma/base/ecma-helpers.h b/jerry-core/ecma/base/ecma-helpers.h
index c332a096..6c7a9d55 100644
--- a/jerry-core/ecma/base/ecma-helpers.h
+++ b/jerry-core/ecma/base/ecma-helpers.h
@@ -170,7 +170,7 @@ ecma_string_t *ecma_new_ecma_string_from_uint32 (uint32_t uint32_number);
 ecma_string_t *ecma_new_ecma_string_from_number (ecma_number_t num);
 ecma_string_t *ecma_new_ecma_string_from_magic_string_id (lit_magic_string_id_t id);
 ecma_string_t *ecma_new_ecma_string_from_magic_string_ex_id (lit_magic_string_ex_id_t id);
-ecma_string_t *ecma_new_ecma_length_string ();
+ecma_string_t *ecma_new_ecma_length_string (void);
 ecma_string_t *ecma_concat_ecma_strings (ecma_string_t *string1_p, ecma_string_t *string2_p);
 void ecma_ref_ecma_string (ecma_string_t *string_p);
 void ecma_deref_ecma_string (ecma_string_t *string_p);
diff --git a/jerry-core/ecma/builtin-objects/ecma-builtin-array-prototype.c b/jerry-core/ecma/builtin-objects/ecma-builtin-array-prototype.c
index 9021c1a9..ef10f84b 100644
--- a/jerry-core/ecma/builtin-objects/ecma-builtin-array-prototype.c
+++ b/jerry-core/ecma/builtin-objects/ecma-builtin-array-prototype.c
@@ -783,10 +783,10 @@ ecma_builtin_array_prototype_object_shift (ecma_value_t this_arg) /**< this argu
     if (ecma_is_value_empty (ret_value))
     {
       len--;
-      ecma_string_t *index_str_p = ecma_new_ecma_string_from_uint32 (len);
+      ecma_string_t *len_str_p = ecma_new_ecma_string_from_uint32 (len);
 
       /* 8. */
-      ECMA_TRY_CATCH (del_value, ecma_op_object_delete (obj_p, index_str_p, true), ret_value);
+      ECMA_TRY_CATCH (del_value, ecma_op_object_delete (obj_p, len_str_p, true), ret_value);
 
       /* 9. */
       ECMA_TRY_CATCH (set_length_value,
@@ -797,7 +797,7 @@ ecma_builtin_array_prototype_object_shift (ecma_value_t this_arg) /**< this argu
 
       ECMA_FINALIZE (set_length_value);
       ECMA_FINALIZE (del_value);
-      ecma_deref_ecma_string (index_str_p);
+      ecma_deref_ecma_string (len_str_p);
     }
 
     ECMA_FINALIZE (first_value);
@@ -1426,11 +1426,9 @@ ecma_builtin_array_prototype_object_splice (ecma_value_t this_arg, /**< this arg
   }
 
   /* 8-9. */
-  uint32_t k;
+  uint32_t k = 0;
 
-  for (uint32_t del_item_idx, k = 0;
-       k < delete_count && ecma_is_value_empty (ret_value);
-       k++)
+  for (uint32_t del_item_idx; k < delete_count && ecma_is_value_empty (ret_value); k++)
   {
     /* 9.a */
     del_item_idx = k + start;
diff --git a/jerry-core/ecma/builtin-objects/ecma-builtin-date.c b/jerry-core/ecma/builtin-objects/ecma-builtin-date.c
index 0b34fe2f..540d501d 100644
--- a/jerry-core/ecma/builtin-objects/ecma-builtin-date.c
+++ b/jerry-core/ecma/builtin-objects/ecma-builtin-date.c
@@ -319,11 +319,11 @@ ecma_builtin_date_parse (ecma_value_t this_arg, /**< this argument */
       else if (date_str_curr_p < date_str_end_p
                && (*date_str_curr_p == '+' || *date_str_curr_p == '-'))
       {
-        ecma_length_t remaining_length;
-        remaining_length = lit_utf8_string_length (date_str_curr_p,
-                                                   (lit_utf8_size_t) (date_str_end_p - date_str_curr_p)) - 1;
+        ecma_length_t remaining_date_length;
+        remaining_date_length = lit_utf8_string_length (date_str_curr_p,
+                                                        (lit_utf8_size_t) (date_str_end_p - date_str_curr_p)) - 1;
 
-        if (remaining_length == 5)
+        if (remaining_date_length == 5)
         {
           bool is_negative = false;
 
diff --git a/jerry-core/ecma/builtin-objects/ecma-builtin-json.c b/jerry-core/ecma/builtin-objects/ecma-builtin-json.c
index 36617e6e..47748bab 100644
--- a/jerry-core/ecma/builtin-objects/ecma-builtin-json.c
+++ b/jerry-core/ecma/builtin-objects/ecma-builtin-json.c
@@ -934,11 +934,10 @@ ecma_builtin_json_stringify (ecma_value_t this_arg, /**< 'this' argument */
                                    array_length,
                                    ret_value);
 
-      uint32_t array_length = ecma_number_to_uint32 (array_length_num);
       uint32_t index = 0;
 
       /* 4.b.ii */
-      while ((index < array_length) && ecma_is_value_empty (ret_value))
+      while ((index < ecma_number_to_uint32 (array_length_num)) && ecma_is_value_empty (ret_value))
       {
         ecma_string_t *index_str_p = ecma_new_ecma_string_from_uint32 (index);
 
@@ -1060,23 +1059,24 @@ ecma_builtin_json_stringify (ecma_value_t this_arg, /**< 'this' argument */
 
         /* 6.a */
         int32_t num_of_spaces = ecma_number_to_int32 (array_length_num);
-        int32_t space = (num_of_spaces > 10) ? 10 : num_of_spaces;
+        num_of_spaces = (num_of_spaces > 10) ? 10 : num_of_spaces;
 
         /* 6.b */
-        if (space < 1)
+        if (num_of_spaces < 1)
         {
           context.gap_str_p = ecma_get_magic_string (LIT_MAGIC_STRING__EMPTY);
         }
         else
         {
-          JMEM_DEFINE_LOCAL_ARRAY (space_buff, space, char);
+          JMEM_DEFINE_LOCAL_ARRAY (space_buff, num_of_spaces, char);
 
-          for (int32_t i = 0; i < space; i++)
+          for (int32_t i = 0; i < num_of_spaces; i++)
           {
             space_buff[i] = LIT_CHAR_SP;
           }
 
-          context.gap_str_p = ecma_new_ecma_string_from_utf8 ((lit_utf8_byte_t *) space_buff, (lit_utf8_size_t) space);
+          context.gap_str_p = ecma_new_ecma_string_from_utf8 ((lit_utf8_byte_t *) space_buff,
+                                                              (lit_utf8_size_t) num_of_spaces);
 
           JMEM_FINALIZE_LOCAL_ARRAY (space_buff);
         }
@@ -1738,11 +1738,9 @@ ecma_builtin_json_array (ecma_object_t *obj_p, /**< the array object*/
                                array_length,
                                ret_value);
 
-  uint32_t array_length = ecma_number_to_uint32 (array_length_num);
-
   /* 7. - 8. */
   for (uint32_t index = 0;
-       index < array_length && ecma_is_value_empty (ret_value);
+       index < ecma_number_to_uint32 (array_length_num) && ecma_is_value_empty (ret_value);
        index++)
   {
 
diff --git a/jerry-core/ecma/builtin-objects/ecma-builtin-string-prototype.c b/jerry-core/ecma/builtin-objects/ecma-builtin-string-prototype.c
index d58a5bab..1a22be70 100644
--- a/jerry-core/ecma/builtin-objects/ecma-builtin-string-prototype.c
+++ b/jerry-core/ecma/builtin-objects/ecma-builtin-string-prototype.c
@@ -998,7 +998,6 @@ ecma_builtin_string_prototype_object_replace_get_string (ecma_builtin_replace_se
           }
 
           ecma_string_t *index_string_p = ecma_new_ecma_string_from_uint32 (index);
-          ecma_object_t *match_object_p = ecma_get_object_from_value (match_value);
 
           ECMA_TRY_CATCH (submatch_value,
                           ecma_op_object_get (match_object_p, index_string_p),
@@ -1863,18 +1862,18 @@ ecma_builtin_string_prototype_object_split (ecma_value_t this_arg, /**< this arg
                 ecma_string_t *idx_str_p = ecma_new_ecma_string_from_uint32 (i);
                 ecma_string_t *new_array_idx_str_p = ecma_new_ecma_string_from_uint32 (new_array_length);
 
-                ecma_value_t match_comp_value = ecma_op_object_get (match_array_obj_p, idx_str_p);
+                match_comp_value = ecma_op_object_get (match_array_obj_p, idx_str_p);
 
                 JERRY_ASSERT (!ECMA_IS_VALUE_ERROR (match_comp_value));
 
                 /* 13.c.iii.7.b */
-                ecma_value_t put_comp = ecma_builtin_helper_def_prop (new_array_p,
-                                                                      new_array_idx_str_p,
-                                                                      match_comp_value,
-                                                                      true,
-                                                                      true,
-                                                                      true,
-                                                                      false);
+                put_comp = ecma_builtin_helper_def_prop (new_array_p,
+                                                         new_array_idx_str_p,
+                                                         match_comp_value,
+                                                         true,
+                                                         true,
+                                                         true,
+                                                         false);
 
                 JERRY_ASSERT (ecma_is_value_true (put_comp));
 
diff --git a/jerry-core/ecma/operations/ecma-objects.c b/jerry-core/ecma/operations/ecma-objects.c
index 6e0f88bc..0a8e571a 100644
--- a/jerry-core/ecma/operations/ecma-objects.c
+++ b/jerry-core/ecma/operations/ecma-objects.c
@@ -864,9 +864,9 @@ ecma_op_object_put (ecma_object_t *object_p, /**< the object */
     if (create_new_property
         && ecma_get_object_extensible (object_p))
     {
-      const ecma_object_type_t type = ecma_get_object_type (object_p);
+      const ecma_object_type_t obj_type = ecma_get_object_type (object_p);
 
-      if (type == ECMA_OBJECT_TYPE_PSEUDO_ARRAY)
+      if (obj_type == ECMA_OBJECT_TYPE_PSEUDO_ARRAY)
       {
         ecma_extended_object_t *ext_object_p = (ecma_extended_object_t *) object_p;
 
@@ -884,7 +884,7 @@ ecma_op_object_put (ecma_object_t *object_p, /**< the object */
 
       uint32_t index = ecma_string_get_array_index (property_name_p);
 
-      if (type == ECMA_OBJECT_TYPE_ARRAY
+      if (obj_type == ECMA_OBJECT_TYPE_ARRAY
           && index != ECMA_STRING_NOT_ARRAY_INDEX)
       {
         ecma_extended_object_t *ext_object_p = (ecma_extended_object_t *) object_p;
@@ -1622,7 +1622,6 @@ ecma_op_object_get_property_names (ecma_object_t *obj_p, /**< object */
         /* name with same hash already occured */
         bool is_equal_found = false;
 
-        ecma_collection_iterator_t iter;
         ecma_collection_iterator_init (&iter, ret_p);
 
         while (ecma_collection_iterator_next (&iter))
diff --git a/jerry-core/ecma/operations/ecma-regexp-object.c b/jerry-core/ecma/operations/ecma-regexp-object.c
index c495d487..faa514e4 100644
--- a/jerry-core/ecma/operations/ecma-regexp-object.c
+++ b/jerry-core/ecma/operations/ecma-regexp-object.c
@@ -1008,7 +1008,7 @@ re_match_regexp (re_matcher_ctx_t *re_ctx_p, /**< RegExp matcher context */
             old_start_p = re_ctx_p->saved_p[start_idx];
             re_ctx_p->saved_p[start_idx] = str_curr_p;
 
-            ecma_value_t match_value = re_match_regexp (re_ctx_p, bc_p, str_curr_p, &sub_str_p);
+            match_value = re_match_regexp (re_ctx_p, bc_p, str_curr_p, &sub_str_p);
 
             if (ecma_is_value_true (match_value))
             {
diff --git a/jerry-core/jmem/jmem-heap.c b/jerry-core/jmem/jmem-heap.c
index 3527b65c..fd804a73 100644
--- a/jerry-core/jmem/jmem-heap.c
+++ b/jerry-core/jmem/jmem-heap.c
@@ -119,10 +119,10 @@ JERRY_STATIC_ASSERT (sizeof (jmem_heap_t) <= JMEM_HEAP_SIZE,
 static void jmem_heap_stat_init (void);
 static void jmem_heap_stat_alloc (size_t num);
 static void jmem_heap_stat_free (size_t num);
-static void jmem_heap_stat_skip ();
-static void jmem_heap_stat_nonskip ();
-static void jmem_heap_stat_alloc_iter ();
-static void jmem_heap_stat_free_iter ();
+static void jmem_heap_stat_skip (void);
+static void jmem_heap_stat_nonskip (void);
+static void jmem_heap_stat_alloc_iter (void);
+static void jmem_heap_stat_free_iter (void);
 
 #  define JMEM_HEAP_STAT_INIT() jmem_heap_stat_init ()
 #  define JMEM_HEAP_STAT_ALLOC(v1) jmem_heap_stat_alloc (v1)
@@ -465,7 +465,7 @@ jmem_heap_free_block (void *ptr, /**< pointer to beginning of data space of the
   /* Find position of region in the list. */
   while (prev_p->next_offset < block_offset)
   {
-    jmem_heap_free_t *const next_p = JMEM_HEAP_GET_ADDR_FROM_OFFSET (prev_p->next_offset);
+    next_p = JMEM_HEAP_GET_ADDR_FROM_OFFSET (prev_p->next_offset);
     JERRY_ASSERT (jmem_is_heap_pointer (next_p));
 
     VALGRIND_DEFINED_SPACE (next_p, sizeof (jmem_heap_free_t));
@@ -619,7 +619,7 @@ jmem_heap_stats_print (void)
  * Initalize heap memory usage statistics account structure
  */
 static void
-jmem_heap_stat_init ()
+jmem_heap_stat_init (void)
 {
   JERRY_CONTEXT (jmem_heap_stats).size = JMEM_HEAP_AREA_SIZE;
 } /* jmem_heap_stat_init */
@@ -678,7 +678,7 @@ jmem_heap_stat_free (size_t size) /**< Size of freed block */
  * Counts number of skip-aheads during insertion of free block
  */
 static void
-jmem_heap_stat_skip ()
+jmem_heap_stat_skip (void)
 {
   JERRY_CONTEXT (jmem_heap_stats).skip_count++;
 } /* jmem_heap_stat_skip  */
@@ -687,7 +687,7 @@ jmem_heap_stat_skip ()
  * Counts number of times we could not skip ahead during free block insertion
  */
 static void
-jmem_heap_stat_nonskip ()
+jmem_heap_stat_nonskip (void)
 {
   JERRY_CONTEXT (jmem_heap_stats).nonskip_count++;
 } /* jmem_heap_stat_nonskip */
@@ -696,7 +696,7 @@ jmem_heap_stat_nonskip ()
  * Count number of iterations required for allocations
  */
 static void
-jmem_heap_stat_alloc_iter ()
+jmem_heap_stat_alloc_iter (void)
 {
   JERRY_CONTEXT (jmem_heap_stats).alloc_iter_count++;
 } /* jmem_heap_stat_alloc_iter */
@@ -705,7 +705,7 @@ jmem_heap_stat_alloc_iter ()
  * Counts number of iterations required for inserting free blocks
  */
 static void
-jmem_heap_stat_free_iter ()
+jmem_heap_stat_free_iter (void)
 {
   JERRY_CONTEXT (jmem_heap_stats).free_iter_count++;
 } /* jmem_heap_stat_free_iter */
diff --git a/jerry-core/parser/js/js-parser-util.c b/jerry-core/parser/js/js-parser-util.c
index 10e8e08e..7241c8b3 100644
--- a/jerry-core/parser/js/js-parser-util.c
+++ b/jerry-core/parser/js/js-parser-util.c
@@ -192,7 +192,7 @@ parser_flush_cbc (parser_context_t *context_p) /**< context */
       {
         literal_index = context_p->last_cbc.third_literal_index;
 
-        lexer_literal_t *literal_p = PARSER_GET_LITERAL (literal_index);
+        literal_p = PARSER_GET_LITERAL (literal_index);
         JERRY_DEBUG_MSG (" idx:%d->", literal_index);
         util_print_literal (literal_p);
       }
@@ -640,7 +640,7 @@ parser_set_continues_to_current_position (parser_context_t *context_p, /**< cont
   }
 } /* parser_set_continues_to_current_position */
 
-#if JERRY_ENABLE_ERROR_MESSAGES
+#ifdef JERRY_ENABLE_ERROR_MESSAGES
 /**
  * Returns with the string representation of the error
  */
diff --git a/jerry-core/parser/js/js-parser.c b/jerry-core/parser/js/js-parser.c
index 334939f5..5b111dbf 100644
--- a/jerry-core/parser/js/js-parser.c
+++ b/jerry-core/parser/js/js-parser.c
@@ -1563,16 +1563,16 @@ parser_post_processing (parser_context_t *context_p) /**< context */
     {
       /* These opcodes are deleted from the stream. */
 #if PARSER_MAXIMUM_CODE_SIZE <= 65535
-      size_t length = 3;
+      size_t counter = 3;
 #else /* PARSER_MAXIMUM_CODE_SIZE > 65535 */
-      size_t length = 4;
+      size_t counter = 4;
 #endif /* PARSER_MAXIMUM_CODE_SIZE <= 65535 */
 
       do
       {
         PARSER_NEXT_BYTE_UPDATE (page_p, offset, real_offset);
       }
-      while (--length > 0);
+      while (--counter > 0);
 
       continue;
     }
@@ -1586,8 +1586,8 @@ parser_post_processing (parser_context_t *context_p) /**< context */
 #ifdef JERRY_DEBUGGER
     if (opcode == CBC_BREAKPOINT_DISABLED)
     {
-      uint32_t offset = (uint32_t) (((uint8_t *) dst_p) - ((uint8_t *) compiled_code_p) - 1);
-      parser_append_breakpoint_info (context_p, JERRY_DEBUGGER_BREAKPOINT_OFFSET_LIST, offset);
+      uint32_t bp_offset = (uint32_t) (((uint8_t *) dst_p) - ((uint8_t *) compiled_code_p) - 1);
+      parser_append_breakpoint_info (context_p, JERRY_DEBUGGER_BREAKPOINT_OFFSET_LIST, bp_offset);
     }
 #endif /* JERRY_DEBUGGER */
 
@@ -2087,8 +2087,8 @@ parser_parse_function (parser_context_t *context_p, /**< context */
      * function expression name, so there is no need to assign special flags. */
     if (context_p->lit_object.type != LEXER_LITERAL_OBJECT_ARGUMENTS)
     {
-      uint8_t status_flags = LEXER_FLAG_VAR | LEXER_FLAG_INITIALIZED | LEXER_FLAG_FUNCTION_NAME;
-      context_p->lit_object.literal_p->status_flags |= status_flags;
+      uint8_t lexer_flags = LEXER_FLAG_VAR | LEXER_FLAG_INITIALIZED | LEXER_FLAG_FUNCTION_NAME;
+      context_p->lit_object.literal_p->status_flags |= lexer_flags;
     }
 
     if (context_p->token.literal_is_reserved
@@ -2177,8 +2177,8 @@ parser_parse_function (parser_context_t *context_p, /**< context */
       }
       else
       {
-        uint8_t status_flags = LEXER_FLAG_VAR | LEXER_FLAG_INITIALIZED | LEXER_FLAG_FUNCTION_ARGUMENT;
-        context_p->lit_object.literal_p->status_flags |= status_flags;
+        uint8_t lexer_flags = LEXER_FLAG_VAR | LEXER_FLAG_INITIALIZED | LEXER_FLAG_FUNCTION_ARGUMENT;
+        context_p->lit_object.literal_p->status_flags |= lexer_flags;
       }
 
       context_p->argument_count++;
@@ -2388,7 +2388,7 @@ parser_parse_script (const uint8_t *source_p, /**< source code */
        * situation. However, a simple value can still be thrown. */
       return ecma_make_error_value (ecma_make_simple_value (ECMA_SIMPLE_VALUE_NULL));
     }
-#if JERRY_ENABLE_ERROR_MESSAGES
+#ifdef JERRY_ENABLE_ERROR_MESSAGES
     const char *err_str_p = parser_error_to_string (parser_error.error);
     uint32_t err_str_size = lit_zt_utf8_string_size ((const lit_utf8_byte_t *) err_str_p);
 
diff --git a/jerry-core/parser/regexp/re-compiler.c b/jerry-core/parser/regexp/re-compiler.c
index 333215be..780f8e95 100644
--- a/jerry-core/parser/regexp/re-compiler.c
+++ b/jerry-core/parser/regexp/re-compiler.c
@@ -387,7 +387,7 @@ re_parse_alternative (re_compiler_ctx_t *re_ctx_p, /**< RegExp compiler context
                                                        : RE_OP_CHAR_CLASS);
         uint32_t offset = re_get_bytecode_length (re_ctx_p->bytecode_ctx_p);
 
-        ECMA_TRY_CATCH (empty,
+        ECMA_TRY_CATCH (empty_value,
                         re_parse_char_class (re_ctx_p->parser_ctx_p,
                                              re_append_char_class,
                                              re_ctx_p,
@@ -400,7 +400,7 @@ re_parse_alternative (re_compiler_ctx_t *re_ctx_p, /**< RegExp compiler context
           re_insert_simple_iterator (re_ctx_p, new_atom_start_offset);
         }
 
-        ECMA_FINALIZE (empty);
+        ECMA_FINALIZE (empty_value);
 
         break;
       }
diff --git a/jerry-core/parser/regexp/re-compiler.h b/jerry-core/parser/regexp/re-compiler.h
index 3b916275..3933597a 100644
--- a/jerry-core/parser/regexp/re-compiler.h
+++ b/jerry-core/parser/regexp/re-compiler.h
@@ -49,7 +49,7 @@ typedef struct
 ecma_value_t
 re_compile_bytecode (const re_compiled_code_t **out_bytecode_p, ecma_string_t *pattern_str_p, uint16_t flags);
 
-void re_cache_gc_run ();
+void re_cache_gc_run (void);
 
 /**
  * @}
diff --git a/jerry-core/vm/vm.c b/jerry-core/vm/vm.c
index 22468d08..f9e3850a 100644
--- a/jerry-core/vm/vm.c
+++ b/jerry-core/vm/vm.c
@@ -753,9 +753,9 @@ vm_loop (vm_frame_ctx_t *frame_ctx_p) /**< frame context */
           {
             case VM_OC_GET_LITERAL_LITERAL:
             {
-              uint16_t literal_index;
-              READ_LITERAL_INDEX (literal_index);
-              READ_LITERAL (literal_index, right_value);
+              uint16_t second_literal_index;
+              READ_LITERAL_INDEX (second_literal_index);
+              READ_LITERAL (second_literal_index, right_value);
               break;
             }
             case VM_OC_GET_STACK_LITERAL:
diff --git a/jerry-main/main-unix.c b/jerry-main/main-unix.c
index a893342e..b9998eb0 100644
--- a/jerry-main/main-unix.c
+++ b/jerry-main/main-unix.c
@@ -344,7 +344,6 @@ main (int argc,
   }
 
   const char *file_names[JERRY_MAX_COMMAND_LINE_ARGS];
-  int i;
   int files_counter = 0;
 
   jerry_init_flag_t flags = JERRY_INIT_EMPTY;
@@ -364,7 +363,7 @@ main (int argc,
   bool is_repl_mode = false;
   bool no_prompt = false;
 
-  for (i = 1; i < argc; i++)
+  for (int i = 1; i < argc; i++)
   {
     if (!strcmp ("-h", argv[i]) || !strcmp ("--help", argv[i]))
     {
@@ -744,9 +743,9 @@ main (int argc,
     const char *prompt = !no_prompt ? "jerry> " : "";
     bool is_done = false;
 
-    jerry_value_t global_obj_val = jerry_get_global_object ();
+    jerry_value_t global_object_val = jerry_get_global_object ();
     jerry_value_t print_func_name_val = jerry_create_string ((jerry_char_t *) "print");
-    jerry_value_t print_function = jerry_get_property (global_obj_val, print_func_name_val);
+    jerry_value_t print_function = jerry_get_property (global_object_val, print_func_name_val);
 
     jerry_release_value (print_func_name_val);
 
@@ -808,7 +807,7 @@ main (int argc,
       }
     }
 
-    jerry_release_value (global_obj_val);
+    jerry_release_value (global_object_val);
     jerry_release_value (print_function);
   }
 
diff --git a/tests/unit/test-date-helpers.c b/tests/unit/test-date-helpers.c
index 1b7f576f..426dabd7 100644
--- a/tests/unit/test-date-helpers.c
+++ b/tests/unit/test-date-helpers.c
@@ -31,7 +31,7 @@
  * Unit test's main function.
  */
 int
-main ()
+main (void)
 {
   /* int ecma_date_day (time)*/
 
diff --git a/tests/unit/test-heap.c b/tests/unit/test-heap.c
index 7d3b598b..6197def8 100644
--- a/tests/unit/test-heap.c
+++ b/tests/unit/test-heap.c
@@ -75,7 +75,7 @@ test_heap_give_some_memory_back (jmem_free_unused_memory_severity_t severity)
 } /* test_heap_give_some_memory_back */
 
 int
-main ()
+main (void)
 {
   TEST_INIT ();
 
diff --git a/tests/unit/test-libm.c b/tests/unit/test-libm.c
index 6a167a63..bcd54030 100644
--- a/tests/unit/test-libm.c
+++ b/tests/unit/test-libm.c
@@ -84,7 +84,7 @@ check_double (const char *expr, double computed, double expected)
 } /* check_double */
 
 int
-main ()
+main (void)
 {
 #define INF INFINITY
 #include "test-libm.inc.h"
diff --git a/tests/unit/test-lit-char-helpers.c b/tests/unit/test-lit-char-helpers.c
index 9e10803e..c203e5c3 100644
--- a/tests/unit/test-lit-char-helpers.c
+++ b/tests/unit/test-lit-char-helpers.c
@@ -22,7 +22,7 @@
 #include "test-common.h"
 
 int
-main ()
+main (void)
 {
   TEST_INIT ();
 
diff --git a/tests/unit/test-literal-storage.c b/tests/unit/test-literal-storage.c
index 0f1c0b16..ceae4a76 100644
--- a/tests/unit/test-literal-storage.c
+++ b/tests/unit/test-literal-storage.c
@@ -38,7 +38,7 @@ generate_string (lit_utf8_byte_t *str, lit_utf8_size_t len)
 } /* generate_string */
 
 static ecma_number_t
-generate_number ()
+generate_number (void)
 {
   ecma_number_t num = ((ecma_number_t) rand () / 32767.0);
   if (rand () % 2)
@@ -54,7 +54,7 @@ generate_number ()
 } /* generate_number */
 
 int
-main ()
+main (void)
 {
   TEST_INIT ();
 
diff --git a/tests/unit/test-longjmp.c b/tests/unit/test-longjmp.c
index fb9f0e89..8ac0fbf4 100644
--- a/tests/unit/test-longjmp.c
+++ b/tests/unit/test-longjmp.c
@@ -68,7 +68,7 @@ test_setjmp_longjmp (volatile int depth)
 } /* test_setjmp_longjmp */
 
 int
-main ()
+main (void)
 {
   TEST_INIT ();
 
diff --git a/tests/unit/test-number-to-integer.c b/tests/unit/test-number-to-integer.c
index 8467163b..0fe66649 100644
--- a/tests/unit/test-number-to-integer.c
+++ b/tests/unit/test-number-to-integer.c
@@ -34,7 +34,7 @@ typedef struct
  * Unit test's main function.
  */
 int
-main ()
+main (void)
 {
   TEST_INIT ();
 
diff --git a/tests/unit/test-number-to-string.c b/tests/unit/test-number-to-string.c
index 3e3cc555..20c9203c 100644
--- a/tests/unit/test-number-to-string.c
+++ b/tests/unit/test-number-to-string.c
@@ -22,7 +22,7 @@
  * Unit test's main function.
  */
 int
-main ()
+main (void)
 {
   TEST_INIT ();
 
diff --git a/tests/unit/test-poolman.c b/tests/unit/test-poolman.c
index 7435e108..cff56477 100644
--- a/tests/unit/test-poolman.c
+++ b/tests/unit/test-poolman.c
@@ -39,7 +39,7 @@ uint8_t *ptrs[TEST_MAX_SUB_ITERS];
 uint8_t data[TEST_MAX_SUB_ITERS][TEST_CHUNK_SIZE];
 
 int
-main ()
+main (void)
 {
   TEST_INIT ();
 
diff --git a/tests/unit/test-string-to-number.c b/tests/unit/test-string-to-number.c
index d39bb47c..a9115570 100644
--- a/tests/unit/test-string-to-number.c
+++ b/tests/unit/test-string-to-number.c
@@ -23,7 +23,7 @@
  * Unit test's main function.
  */
 int
-main ()
+main (void)
 {
   TEST_INIT ();
 
diff --git a/tests/unit/test-strings.c b/tests/unit/test-strings.c
index 5cad4da5..31218bde 100644
--- a/tests/unit/test-strings.c
+++ b/tests/unit/test-strings.c
@@ -100,7 +100,7 @@ generate_cesu8_string (lit_utf8_byte_t *buf_p,
 } /* generate_cesu8_string */
 
 int
-main ()
+main (void)
 {
   TEST_INIT ();