Add feature to remove parser.

Remove the parser so we can save space if we are
only interested in running snapshots.

Removing the parser enables the snapshot execution.

JerryScript-DCO-1.0-Signed-off-by: Sergio Martinez [email protected]

Author: sergioamr

jerry-core/CMakeLists.txt

@@ -28,6 +28,7 @@ set(FEATURE_PARSER_DUMP     OFF    CACHE BOOL   "Enable parser byte-code dumps?"
 set(FEATURE_REGEXP_DUMP     OFF    CACHE BOOL   "Enable regexp byte-code dumps?")
 set(FEATURE_SNAPSHOT_SAVE   OFF    CACHE BOOL   "Enable saving snapshot files?")
 set(FEATURE_SNAPSHOT_EXEC   OFF    CACHE BOOL   "Enable executing snapshot files?")
+set(FEATURE_PARSER_DISABLE  OFF    CACHE BOOL   "Disable the parser and 'eval' and use only snapshots?")
 set(MEM_HEAP_SIZE_KB        "512"  CACHE STRING "Size of memory heap, in kilobytes")
 
 # Status messages
@@ -42,6 +43,7 @@ message(STATUS "FEATURE_PARSER_DUMP       " ${FEATURE_PARSER_DUMP})
 message(STATUS "FEATURE_REGEXP_DUMP       " ${FEATURE_REGEXP_DUMP})
 message(STATUS "FEATURE_SNAPSHOT_SAVE     " ${FEATURE_SNAPSHOT_SAVE})
 message(STATUS "FEATURE_SNAPSHOT_EXEC     " ${FEATURE_SNAPSHOT_EXEC})
+message(STATUS "FEATURE_PARSER_DISABLE    " ${FEATURE_PARSER_DISABLE})
 message(STATUS "MEM_HEAP_SIZE_KB          " ${MEM_HEAP_SIZE_KB})
 
 # Include directories
@@ -140,6 +142,12 @@ elseif(NOT FEATURE_PROFILE STREQUAL "es2015-subset")
   message(FATAL_ERROR "FEATURE_PROFILE='${FEATURE_PROFILE}' isn't supported")
 endif()
 
+# Disable parser and enable snapshots
+if(FEATURE_PARSER_DISABLE)
+  set(DEFINES_JERRY ${DEFINES_JERRY} JERRY_DISABLE_PARSER)
+  set(DEFINES_JERRY ${DEFINES_JERRY} JERRY_ENABLE_SNAPSHOT_EXEC)
+endif()
+
 # Jerry heap-section
 if(DEFINED JERRY_HEAP_SECTION_ATTR)
   set(DEFINES_JERRY ${DEFINES_JERRY} JERRY_HEAP_SECTION_ATTR=${JERRY_HEAP_SECTION_ATTR})

jerry-core/parser/js/js-parser.c

@@ -19,6 +19,8 @@
 #include "jcontext.h"
 #include "js-parser-internal.h"
 
+#ifndef JERRY_DISABLE_PARSER
+
 /** \addtogroup parser Parser
  * @{
  *
@@ -2228,6 +2230,8 @@ parser_raise_error (parser_context_t *context_p, /**< context */
 #define PARSE_ERR_POS_END         "]"
 #define PARSE_ERR_POS_END_SIZE    ((uint32_t) sizeof (PARSE_ERR_POS_END))
 
+#endif /* !JERRY_DISABLE_PARSER */
+
 /**
  * Parse EcamScript source code
  *
@@ -2243,6 +2247,7 @@ parser_parse_script (const uint8_t *source_p, /**< source code */
                      bool is_strict, /**< strict mode */
                      ecma_compiled_code_t **bytecode_data_p) /**< [out] JS bytecode */
 {
+#ifndef JERRY_DISABLE_PARSER
   parser_error_location_t parser_error;
   *bytecode_data_p = parser_parse_source (source_p, size, is_strict, &parser_error);
 
@@ -2305,8 +2310,15 @@ parser_parse_script (const uint8_t *source_p, /**< source code */
     return ecma_raise_syntax_error ("");
 #endif /* JERRY_ENABLE_ERROR_MESSAGES */
   }
-
   return ecma_make_simple_value (ECMA_SIMPLE_VALUE_TRUE);
+#else /* !JERRY_DISABLE_PARSER */
+  JERRY_UNUSED (source_p);
+  JERRY_UNUSED (size);
+  JERRY_UNUSED (is_strict);
+  JERRY_UNUSED (bytecode_data_p);
+
+  return ecma_raise_syntax_error ("");
+#endif /* JERRY_DISABLE_PARSER */
 } /* parser_parse_script */
 
 /**