Implement function.toString operation (#4752)

May increase the memory consumtpion heavily. JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com
2021-08-31 13:37:25 +02:00
parent 1c6b18ecdf
commit 6649940ea6
37 changed files with 1002 additions and 192 deletions
@@ -1003,7 +1003,13 @@ LIT_MAGIC_STRING_DEF (LIT_MAGIC_STRING_SET_UTC_MILLISECONDS_UL, "setUTCMilliseco
 LIT_MAGIC_STRING_DEF (LIT_MAGIC_STRING_TO_LOCALE_DATE_STRING_UL, "toLocaleDateString")
 LIT_MAGIC_STRING_DEF (LIT_MAGIC_STRING_TO_LOCALE_TIME_STRING_UL, "toLocaleTimeString")
 #endif
+#if JERRY_FUNCTION_TO_STRING
+LIT_MAGIC_STRING_DEF (LIT_MAGIC_STRING_FUNCTION_TO_STRING_ANON, "function anonymous(")
+#endif
 LIT_MAGIC_STRING_DEF (LIT_MAGIC_STRING_GET_OWN_PROPERTY_NAMES_UL, "getOwnPropertyNames")
+#if JERRY_ESNEXT && JERRY_FUNCTION_TO_STRING
+LIT_MAGIC_STRING_DEF (LIT_MAGIC_STRING_FUNCTION_TO_STRING_ANON_GENERATOR, "function* anonymous(")
+#endif
 LIT_MAGIC_STRING_DEF (LIT_MAGIC_STRING_PROPERTY_IS_ENUMERABLE_UL, "propertyIsEnumerable")
 #if JERRY_ESNEXT
 LIT_MAGIC_STRING_DEF (LIT_MAGIC_STRING_GET_OWN_PROPERTY_SYMBOLS_UL, "getOwnPropertySymbols")
@@ -1011,10 +1017,20 @@ LIT_MAGIC_STRING_DEF (LIT_MAGIC_STRING_ASYNC_GENERATOR_FUNCTION_UL, "AsyncGenera
 LIT_MAGIC_STRING_DEF (LIT_MAGIC_STRING_REGEXP_STRING_ITERATOR_UL, "RegExp String Iterator")
 #endif
 LIT_MAGIC_STRING_DEF (LIT_MAGIC_STRING_GET_OWN_PROPERTY_DESCRIPTOR_UL, "getOwnPropertyDescriptor")
+#if JERRY_ESNEXT && JERRY_FUNCTION_TO_STRING
+LIT_MAGIC_STRING_DEF (LIT_MAGIC_STRING_FUNCTION_TO_STRING_ANON_ASYNC, "async function anonymous(")
+#endif
 #if JERRY_ESNEXT
 LIT_MAGIC_STRING_DEF (LIT_MAGIC_STRING_GET_OWN_PROPERTY_DESCRIPTORS_UL, "getOwnPropertyDescriptors")
 #endif
-LIT_MAGIC_STRING_DEF (LIT_MAGIC_STRING__FUNCTION_TO_STRING, "function(){/* ecmascript */}")
+#if JERRY_ESNEXT && JERRY_FUNCTION_TO_STRING
+LIT_MAGIC_STRING_DEF (LIT_MAGIC_STRING_FUNCTION_TO_STRING_ANON_ASYNC_GENERATOR, "async function* anonymous(")
+#endif
+LIT_MAGIC_STRING_DEF (LIT_MAGIC_STRING_FUNCTION_TO_STRING_NATIVE, "function () { [native code] }")
+#if JERRY_FUNCTION_TO_STRING && JERRY_SNAPSHOT_EXEC \
+|| !(JERRY_FUNCTION_TO_STRING)
+LIT_MAGIC_STRING_DEF (LIT_MAGIC_STRING_FUNCTION_TO_STRING_ECMA, "function () { /* ecmascript */ }")
+#endif

 LIT_MAGIC_STRING_FIRST_STRING_WITH_SIZE (0, LIT_MAGIC_STRING__EMPTY)
 #if JERRY_ESNEXT
@@ -1213,8 +1229,16 @@ LIT_MAGIC_STRING_FIRST_STRING_WITH_SIZE (17, LIT_MAGIC_STRING_GET_TIMEZONE_OFFSE
 LIT_MAGIC_STRING_FIRST_STRING_WITH_SIZE (17, LIT_MAGIC_STRING_PREVENT_EXTENSIONS_UL)
 #endif
 LIT_MAGIC_STRING_FIRST_STRING_WITH_SIZE (18, LIT_MAGIC_STRING_DECODE_URI_COMPONENT)
+#if JERRY_FUNCTION_TO_STRING
+LIT_MAGIC_STRING_FIRST_STRING_WITH_SIZE (19, LIT_MAGIC_STRING_FUNCTION_TO_STRING_ANON)
+#else
 LIT_MAGIC_STRING_FIRST_STRING_WITH_SIZE (19, LIT_MAGIC_STRING_GET_OWN_PROPERTY_NAMES_UL)
+#endif
+#if JERRY_ESNEXT && JERRY_FUNCTION_TO_STRING
+LIT_MAGIC_STRING_FIRST_STRING_WITH_SIZE (20, LIT_MAGIC_STRING_FUNCTION_TO_STRING_ANON_GENERATOR)
+#else
 LIT_MAGIC_STRING_FIRST_STRING_WITH_SIZE (20, LIT_MAGIC_STRING_PROPERTY_IS_ENUMERABLE_UL)
+#endif
 #if JERRY_ESNEXT
 LIT_MAGIC_STRING_FIRST_STRING_WITH_SIZE (21, LIT_MAGIC_STRING_GET_OWN_PROPERTY_SYMBOLS_UL)
 #else
@@ -1227,11 +1251,32 @@ LIT_MAGIC_STRING_FIRST_STRING_WITH_SIZE (22, LIT_MAGIC_STRING_GET_OWN_PROPERTY_D
 #endif
 LIT_MAGIC_STRING_FIRST_STRING_WITH_SIZE (23, LIT_MAGIC_STRING_GET_OWN_PROPERTY_DESCRIPTOR_UL)
 LIT_MAGIC_STRING_FIRST_STRING_WITH_SIZE (24, LIT_MAGIC_STRING_GET_OWN_PROPERTY_DESCRIPTOR_UL)
-#if JERRY_ESNEXT
+#if JERRY_ESNEXT && JERRY_FUNCTION_TO_STRING
+LIT_MAGIC_STRING_FIRST_STRING_WITH_SIZE (25, LIT_MAGIC_STRING_FUNCTION_TO_STRING_ANON_ASYNC)
+#elif JERRY_ESNEXT
 LIT_MAGIC_STRING_FIRST_STRING_WITH_SIZE (25, LIT_MAGIC_STRING_GET_OWN_PROPERTY_DESCRIPTORS_UL)
+#elif JERRY_ESNEXT && JERRY_FUNCTION_TO_STRING
+LIT_MAGIC_STRING_FIRST_STRING_WITH_SIZE (25, LIT_MAGIC_STRING_FUNCTION_TO_STRING_ANON_ASYNC_GENERATOR)
 #else
-LIT_MAGIC_STRING_FIRST_STRING_WITH_SIZE (25, LIT_MAGIC_STRING__FUNCTION_TO_STRING)
+LIT_MAGIC_STRING_FIRST_STRING_WITH_SIZE (25, LIT_MAGIC_STRING_FUNCTION_TO_STRING_NATIVE)
+#endif
+#if JERRY_ESNEXT && JERRY_FUNCTION_TO_STRING
+LIT_MAGIC_STRING_FIRST_STRING_WITH_SIZE (26, LIT_MAGIC_STRING_FUNCTION_TO_STRING_ANON_ASYNC_GENERATOR)
+#else
+LIT_MAGIC_STRING_FIRST_STRING_WITH_SIZE (26, LIT_MAGIC_STRING_FUNCTION_TO_STRING_NATIVE)
+#endif
+LIT_MAGIC_STRING_FIRST_STRING_WITH_SIZE (27, LIT_MAGIC_STRING_FUNCTION_TO_STRING_NATIVE)
+LIT_MAGIC_STRING_FIRST_STRING_WITH_SIZE (28, LIT_MAGIC_STRING_FUNCTION_TO_STRING_NATIVE)
+LIT_MAGIC_STRING_FIRST_STRING_WITH_SIZE (29, LIT_MAGIC_STRING_FUNCTION_TO_STRING_NATIVE)
+#if JERRY_FUNCTION_TO_STRING && JERRY_SNAPSHOT_EXEC \
+|| !(JERRY_FUNCTION_TO_STRING)
+LIT_MAGIC_STRING_FIRST_STRING_WITH_SIZE (30, LIT_MAGIC_STRING_FUNCTION_TO_STRING_ECMA)
+#endif
+#if JERRY_FUNCTION_TO_STRING && JERRY_SNAPSHOT_EXEC \
+|| !(JERRY_FUNCTION_TO_STRING)
+LIT_MAGIC_STRING_FIRST_STRING_WITH_SIZE (31, LIT_MAGIC_STRING_FUNCTION_TO_STRING_ECMA)
+#endif
+#if JERRY_FUNCTION_TO_STRING && JERRY_SNAPSHOT_EXEC \
+|| !(JERRY_FUNCTION_TO_STRING)
+LIT_MAGIC_STRING_FIRST_STRING_WITH_SIZE (32, LIT_MAGIC_STRING_FUNCTION_TO_STRING_ECMA)
 #endif
-LIT_MAGIC_STRING_FIRST_STRING_WITH_SIZE (26, LIT_MAGIC_STRING__FUNCTION_TO_STRING)
-LIT_MAGIC_STRING_FIRST_STRING_WITH_SIZE (27, LIT_MAGIC_STRING__FUNCTION_TO_STRING)
-LIT_MAGIC_STRING_FIRST_STRING_WITH_SIZE (28, LIT_MAGIC_STRING__FUNCTION_TO_STRING)
@@ -406,10 +406,15 @@ LIT_MAGIC_STRING_SET_UTC_MILLISECONDS_UL = "setUTCMilliseconds"
 LIT_MAGIC_STRING_TO_LOCALE_DATE_STRING_UL = "toLocaleDateString"
 LIT_MAGIC_STRING_TO_LOCALE_TIME_STRING_UL = "toLocaleTimeString"
 LIT_MAGIC_STRING_GET_OWN_PROPERTY_NAMES_UL = "getOwnPropertyNames"
+LIT_MAGIC_STRING_FUNCTION_TO_STRING_ANON = "function anonymous("
+LIT_MAGIC_STRING_FUNCTION_TO_STRING_ANON_GENERATOR = "function* anonymous("
 LIT_MAGIC_STRING_PROPERTY_IS_ENUMERABLE_UL = "propertyIsEnumerable"
 LIT_MAGIC_STRING_GET_OWN_PROPERTY_SYMBOLS_UL = "getOwnPropertySymbols"
 LIT_MAGIC_STRING_REGEXP_STRING_ITERATOR_UL = "RegExp String Iterator"
 LIT_MAGIC_STRING_ASYNC_GENERATOR_FUNCTION_UL = "AsyncGeneratorFunction"
 LIT_MAGIC_STRING_GET_OWN_PROPERTY_DESCRIPTOR_UL = "getOwnPropertyDescriptor"
+LIT_MAGIC_STRING_FUNCTION_TO_STRING_ANON_ASYNC = "async function anonymous("
 LIT_MAGIC_STRING_GET_OWN_PROPERTY_DESCRIPTORS_UL = "getOwnPropertyDescriptors"
-LIT_MAGIC_STRING__FUNCTION_TO_STRING = "function(){/* ecmascript */}"
+LIT_MAGIC_STRING_FUNCTION_TO_STRING_ANON_ASYNC_GENERATOR = "async function* anonymous("
+LIT_MAGIC_STRING_FUNCTION_TO_STRING_NATIVE = "function () { [native code] }"
+LIT_MAGIC_STRING_FUNCTION_TO_STRING_ECMA = "function () { /* ecmascript */ }"
@@ -22,14 +22,14 @@
 *
 * NOTE:
 *   Isolated surrogates are allowed.
- *   Correct pair of surrogates is not allowed, it should be represented as 4-byte utf-8 character.
 *
 * @return true if utf-8 string is well-formed
 *         false otherwise
 */
 bool
 lit_is_valid_utf8_string (const lit_utf8_byte_t *utf8_buf_p, /**< utf-8 string */
-                          lit_utf8_size_t buf_size) /**< string size */
+                          lit_utf8_size_t buf_size, /**< string size */
+                          bool is_strict) /**< true if surrogate pairs are not allowed */
 {
  lit_utf8_size_t idx = 0;

@@ -95,21 +95,22 @@ lit_is_valid_utf8_string (const lit_utf8_byte_t *utf8_buf_p, /**< utf-8 string *
      return false;
    }

-    if (code_point >= LIT_UTF16_HIGH_SURROGATE_MIN
-        && code_point <= LIT_UTF16_HIGH_SURROGATE_MAX)
-    {
-      is_prev_code_point_high_surrogate = true;
-    }
-    else if (code_point >= LIT_UTF16_LOW_SURROGATE_MIN
-             && code_point <= LIT_UTF16_LOW_SURROGATE_MAX
-             && is_prev_code_point_high_surrogate)
-    {
-      /* sequence of high and low surrogate is not allowed */
-      return false;
-    }
-    else
+    if (is_strict)
    {
      is_prev_code_point_high_surrogate = false;
+
+      if (code_point >= LIT_UTF16_HIGH_SURROGATE_MIN
+          && code_point <= LIT_UTF16_HIGH_SURROGATE_MAX)
+      {
+        is_prev_code_point_high_surrogate = true;
+      }
+      else if (code_point >= LIT_UTF16_LOW_SURROGATE_MIN
+               && code_point <= LIT_UTF16_LOW_SURROGATE_MAX
+               && is_prev_code_point_high_surrogate)
+      {
+        /* sequence of high and low surrogate is not allowed */
+        return false;
+      }
    }

    idx += extra_bytes_count;
@@ -84,7 +84,7 @@
 #define LIT_UTF8_FIRST_BYTE_MAX (0xF8)

 /* validation */
-bool lit_is_valid_utf8_string (const lit_utf8_byte_t *utf8_buf_p, lit_utf8_size_t buf_size);
+bool lit_is_valid_utf8_string (const lit_utf8_byte_t *utf8_buf_p, lit_utf8_size_t buf_size, bool strict);
 bool lit_is_valid_cesu8_string (const lit_utf8_byte_t *cesu8_buf_p, lit_utf8_size_t buf_size);

 /* checks */