diff --git a/src/liballocator/mem-allocator.c b/src/liballocator/mem-allocator.c
index e030c3f4f..2484c51c2 100644
--- a/src/liballocator/mem-allocator.c
+++ b/src/liballocator/mem-allocator.c
@@ -38,15 +38,32 @@ JERRY_STATIC_ASSERT( MEM_HEAP_AREA_SIZE <= 64 * 1024 );
 void
 mem_init( void)
 {
-    mem_heap_init( mem_heap_area, sizeof (mem_heap_area));
-    mem_pools_init();
+  mem_heap_init( mem_heap_area, sizeof (mem_heap_area));
+  mem_pools_init();
 } /* mem_init */
 
+/**
+ * Finalize memory allocators.
+ */
+void
+mem_finalize( bool is_show_mem_stats) /**< show heap memory stats
+                                           before finalization? */
+{
+  mem_pools_finalize();
+
+  if (is_show_mem_stats)
+    {
+      mem_heap_print( false, false, true);
+    }
+
+  mem_heap_finalize();
+} /* mem_finalize */
+
 /**
  * Get base pointer for allocation area.
  */
 uintptr_t
 mem_get_base_pointer( void)
 {
-    return (uintptr_t) mem_heap_area;
+  return (uintptr_t) mem_heap_area;
 } /* mem_get_base_pointer */
diff --git a/src/liballocator/mem-allocator.h b/src/liballocator/mem-allocator.h
index beffca8f2..9d2bbdf22 100644
--- a/src/liballocator/mem-allocator.h
+++ b/src/liballocator/mem-allocator.h
@@ -37,6 +37,7 @@
 #define MEM_ALIGNMENT       (1 << MEM_ALIGNMENT_LOG)
 
 extern void mem_init(void);
+extern void mem_finalize(bool is_show_mem_stats);
 uintptr_t mem_get_base_pointer(void);
 
 #endif /* !JERRY_MEM_ALLOCATOR_H */
diff --git a/src/liballocator/mem-heap.c b/src/liballocator/mem-heap.c
index 312d599af..e69bc084f 100644
--- a/src/liballocator/mem-heap.c
+++ b/src/liballocator/mem-heap.c
@@ -40,14 +40,14 @@
 # define VALGRIND_DEFINED_STRUCT( s)     (void)VALGRIND_MAKE_MEM_DEFINED( ( s ), sizeof( *( s ) ) )
 # define VALGRIND_NOACCESS_SPACE( p, s)  (void)VALGRIND_MAKE_MEM_NOACCESS( ( p ), ( s ) )
 # define VALGRIND_UNDEFINED_SPACE( p, s) (void)VALGRIND_MAKE_MEM_UNDEFINED( ( p ), ( s ) )
-# define VALGRIND_DEFINED_SPACET( p, s)  (void)VALGRIND_MAKE_MEM_DEFINED( ( p ), ( s ) )
+# define VALGRIND_DEFINED_SPACE( p, s)   (void)VALGRIND_MAKE_MEM_DEFINED( ( p ), ( s ) )
 #else /* !JERRRY_NVALGRIND */
 # define VALGRIND_NOACCESS_STRUCT( s)
 # define VALGRIND_UNDEFINED_STRUCT( s)
 # define VALGRIND_DEFINED_STRUCT( s)
 # define VALGRIND_NOACCESS_SPACE( p, s)
 # define VALGRIND_UNDEFINED_SPACE( p, s)
-# define VALGRIND_DEFINED_SPACET( p, s)
+# define VALGRIND_DEFINED_SPACE( p, s)
 #endif /* !JERRY_NVALGRIND */
 
 /**
@@ -225,6 +225,22 @@ mem_heap_init(uint8_t *heap_start, /**< first address of heap space */
   mem_heap_stat_init();
 } /* mem_heap_init */
 
+/**
+ * Finalize heap
+ */
+void
+mem_heap_finalize(void)
+{
+  VALGRIND_DEFINED_SPACE( mem_heap.heap_start, mem_heap.heap_size);
+
+  JERRY_ASSERT( mem_heap.first_block_p == mem_heap.last_block_p );
+  JERRY_ASSERT( mem_heap.first_block_p->magic_num == MEM_MAGIC_NUM_OF_FREE_BLOCK );
+
+  VALGRIND_NOACCESS_SPACE( mem_heap.heap_start, mem_heap.heap_size);
+
+  __memset( &mem_heap, 0, sizeof(mem_heap));
+} /* mem_heap_finalize */
+
 /**
  * Initialize block header
  */
diff --git a/src/liballocator/mem-heap.h b/src/liballocator/mem-heap.h
index 08d1a5016..59d6ae91f 100644
--- a/src/liballocator/mem-heap.h
+++ b/src/liballocator/mem-heap.h
@@ -39,6 +39,7 @@ typedef enum {
 } mem_heap_alloc_term_t;
 
 extern void mem_heap_init(uint8_t *heap_start, size_t heap_size);
+extern void mem_heap_finalize(void);
 extern uint8_t* mem_heap_alloc_block(size_t size_in_bytes, mem_heap_alloc_term_t alloc_term);
 extern void mem_heap_free_block(uint8_t *ptr);
 extern size_t mem_heap_recommend_allocation_size(size_t minimum_allocation_size);
diff --git a/src/liballocator/mem-poolman.c b/src/liballocator/mem-poolman.c
index edb27b716..d5a0b4f06 100644
--- a/src/liballocator/mem-poolman.c
+++ b/src/liballocator/mem-poolman.c
@@ -122,6 +122,26 @@ mem_pools_init(void)
   mem_pools_stat_init();
 } /* mem_pools_init */
 
+/**
+ * Finalize pool manager
+ */
+void
+mem_pools_finalize(void)
+{
+  for ( uint32_t i = 0; i < MEM_POOL_CHUNK_TYPE__COUNT; i++ )
+    {
+      JERRY_ASSERT( mem_pools[ i ] == NULL );
+      JERRY_ASSERT( mem_free_chunks_number[ i ] == 0 );
+    }
+
+  JERRY_ASSERT( mem_pool_for_pool_headers.chunks_number == mem_pool_for_pool_headers.free_chunks_number );
+
+  __memset( &mem_pool_for_pool_headers, 0, sizeof(mem_pool_for_pool_headers));
+
+  mem_heap_free_block( mem_space_for_pool_for_pool_headers);
+  mem_space_for_pool_for_pool_headers = NULL;
+} /* mem_pools_finalize */
+
 /**
  * Allocate a chunk of specified size
  * 
diff --git a/src/liballocator/mem-poolman.h b/src/liballocator/mem-poolman.h
index d02554f0b..45cd685f1 100644
--- a/src/liballocator/mem-poolman.h
+++ b/src/liballocator/mem-poolman.h
@@ -54,6 +54,7 @@ typedef enum {
 extern size_t mem_get_chunk_size( mem_pool_chunk_type_t chunk_type);
 
 extern void mem_pools_init(void);
+extern void mem_pools_finalize(void);
 extern uint8_t* mem_pools_alloc(mem_pool_chunk_type_t chunk_type);
 extern void mem_pools_free(mem_pool_chunk_type_t chunk_type, uint8_t *chunk_p);
 
diff --git a/src/libcoreint/interpreter.c b/src/libcoreint/interpreter.c
index d886483e7..023d31ad5 100644
--- a/src/libcoreint/interpreter.c
+++ b/src/libcoreint/interpreter.c
@@ -14,9 +14,11 @@
  */
 
 #include "deserializer.h"
+#include "ecma-gc.h"
 #include "ecma-globals.h"
 #include "ecma-helpers.h"
 #include "ecma-lex-env.h"
+#include "ecma-operations.h"
 #include "globals.h"
 #include "interpreter.h"
 #include "jerry-libc.h"
@@ -66,6 +68,10 @@ run_int (void)
       }
     case ECMA_COMPLETION_TYPE_EXIT:
       {
+        ecma_deref_object( lex_env_p);
+        ecma_finalize();
+        ecma_gc_run( ECMA_GC_GEN_COUNT - 1);
+
         return ecma_is_value_true( completion.value);
       }
     case ECMA_COMPLETION_TYPE_BREAK:
diff --git a/src/libecmaoperations/ecma-finalize.c b/src/libecmaoperations/ecma-finalize.c
new file mode 100644
index 000000000..d017bd22f
--- /dev/null
+++ b/src/libecmaoperations/ecma-finalize.c
@@ -0,0 +1,28 @@
+/* Copyright 2014 Samsung Electronics Co., Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "ecma-operations.h"
+#include "ecma-globals.h"
+#include "ecma-global-object.h"
+#include "globals.h"
+
+/**
+ * ECMA object model finalization routine
+ */
+void
+ecma_finalize(void)
+{
+  ecma_finalize_global_object();
+} /* ecma_finalize */
diff --git a/src/libecmaoperations/ecma-global-object.c b/src/libecmaoperations/ecma-global-object.c
index 2275c478e..c39f255ff 100644
--- a/src/libecmaoperations/ecma-global-object.c
+++ b/src/libecmaoperations/ecma-global-object.c
@@ -77,6 +77,19 @@ ecma_op_create_global_object( void)
   return glob_obj_p;
 } /* ecma_op_create_global_object */
 
+/**
+ * Remove global reference to the global object.
+ *
+ * Warning:
+ *         the routine should be called only from ecma_finalize
+ */
+void
+ecma_finalize_global_object(void)
+{
+  ecma_deref_object( ecma_global_object_p);
+  ecma_global_object_p = NULL;
+} /* ecma_free_global_object */
+
 /**
  * @}
  * @}
diff --git a/src/libecmaoperations/ecma-global-object.h b/src/libecmaoperations/ecma-global-object.h
index d0c2cdd61..901ad2121 100644
--- a/src/libecmaoperations/ecma-global-object.h
+++ b/src/libecmaoperations/ecma-global-object.h
@@ -27,6 +27,7 @@
 
 extern ecma_object_t* ecma_get_global_object(void);
 extern ecma_object_t* ecma_op_create_global_object( void);
+extern void ecma_finalize_global_object( void);
 
 /**
  * @}
diff --git a/src/libecmaoperations/ecma-lex-env.c b/src/libecmaoperations/ecma-lex-env.c
index d9dcc9aff..f09cf5aef 100644
--- a/src/libecmaoperations/ecma-lex-env.c
+++ b/src/libecmaoperations/ecma-lex-env.c
@@ -492,6 +492,8 @@ ecma_op_create_global_environment( void)
 
   ecma_object_t *glob_env_p = ecma_create_object_lex_env( NULL, glob_obj_p, false);
 
+  ecma_deref_object( glob_obj_p);
+
   return glob_env_p;
 } /* ecma_op_create_global_environment */
 
diff --git a/src/libecmaoperations/ecma-operations.h b/src/libecmaoperations/ecma-operations.h
index f480d1f00..0745f06ad 100644
--- a/src/libecmaoperations/ecma-operations.h
+++ b/src/libecmaoperations/ecma-operations.h
@@ -32,6 +32,8 @@ extern ecma_reference_t ecma_op_get_identifier_reference( ecma_object_t *lex_env
 extern ecma_completion_value_t ecma_op_get_value( ecma_reference_t ref);
 extern ecma_completion_value_t ecma_op_put_value( ecma_reference_t ref, ecma_value_t value);
 
+extern void ecma_finalize( void);
+
 /**
  * @}
  * @}
diff --git a/src/liboptimizer/bytecode-data.h b/src/liboptimizer/bytecode-data.h
index 2c7a4c653..37f9f1b01 100644
--- a/src/liboptimizer/bytecode-data.h
+++ b/src/liboptimizer/bytecode-data.h
@@ -31,7 +31,7 @@
       U8 nums_count;
       U32 nums[nums_count];
    } */
-uint8_t *bytecode_data;
+extern uint8_t *bytecode_data;
 OPCODE bytecode_opcodes[MAX_OPCODES];
 
-#endif // BYTECODE_LINUX_H
\ No newline at end of file
+#endif // BYTECODE_LINUX_H
diff --git a/src/liboptimizer/serializer.c b/src/liboptimizer/serializer.c
index e3ef9feeb..731238808 100644
--- a/src/liboptimizer/serializer.c
+++ b/src/liboptimizer/serializer.c
@@ -22,6 +22,8 @@
 
 static bool print_opcodes;
 
+uint8_t *bytecode_data = NULL;
+
 void
 serializer_init (bool show_opcodes)
 {
@@ -142,3 +144,10 @@ serializer_print_opcodes (void)
       pp_opcode (loc, bytecode_opcodes[loc], false);
     }
 }
+
+void
+serializer_free (void)
+{
+  mem_heap_free_block( bytecode_data);
+  bytecode_data = NULL;
+}
diff --git a/src/liboptimizer/serializer.h b/src/liboptimizer/serializer.h
index 624016c2b..efb4f938b 100644
--- a/src/liboptimizer/serializer.h
+++ b/src/liboptimizer/serializer.h
@@ -32,4 +32,6 @@ void serializer_rewrite_opcode (const opcode_counter_t, OPCODE);
 
 void serializer_print_opcodes (void);
 
+void serializer_free(void);
+
 #endif // SERIALIZER_H
diff --git a/src/main.c b/src/main.c
index 5af6f3d43..1d553cbf9 100644
--- a/src/main.c
+++ b/src/main.c
@@ -68,9 +68,9 @@ parser_run (const char *script_source, size_t script_source_size, bool is_show_o
   return opcodes;
 }
 
-static int
-jerry_run (const char *script_source, size_t script_source_size, bool is_parse_only, 
-           bool is_show_opcodes)
+static bool
+jerry_run (const char *script_source, size_t script_source_size,
+           bool is_parse_only, bool is_show_opcodes, bool is_show_mem_stats)
 {
   const OPCODE *opcodes;
 
@@ -82,12 +82,18 @@ jerry_run (const char *script_source, size_t script_source_size, bool is_parse_o
 
   if (is_parse_only)
     {
-      return 0;
+      return true;
     }
 
   init_int (opcodes);
   
-  return run_int () ? 0 : 1;
+  bool is_success = run_int ();
+
+  serializer_free();
+
+  mem_finalize( is_show_mem_stats);
+
+  return is_success;
 } /* jerry_run */
 
 #ifdef __TARGET_HOST_x64
@@ -199,14 +205,9 @@ main (int argc __unused,
   size_t source_size;
   const char *source_p = read_sources (file_names, files_counter, &source_size);
 
-  int ret = jerry_run (source_p, source_size, parse_only, show_opcodes);
+  bool is_success = jerry_run (source_p, source_size, parse_only, show_opcodes, print_mem_stats);
 
-  if (print_mem_stats)
-    {
-      mem_heap_print( false, false, true);
-    }
-
-  return ret;
+  return is_success ? 0 : 1;
 }
 #endif
 
@@ -229,7 +230,7 @@ main (void)
   set_sys_tick_counter ((uint32_t) - 1);
   start = get_sys_tick_counter ();
   jerry_run (source_p,
-             source_size, false, false);
+             source_size, false, false, false);
   finish_parse_ms = (start - get_sys_tick_counter ()) / 1000;
 }
 #endif