Support external context, heap and lcache (#1778)

JerryScript should support external context, heap and lcache,
so that it can have multiple instances and runtime configurable heap
size.

Related issue: 1746

JerryScript-DCO-1.0-Signed-off-by: Zidong Jiang zidong.jiang@intel.com

jerry-core/jmem/jmem-heap.c

@@ -103,11 +103,13 @@ jmem_heap_get_region_end (jmem_heap_free_t *curr_p) /**< current region */
 } /* jmem_heap_get_region_end */
 #endif /* !JERRY_SYSTEM_ALLOCATOR */
 
+#ifndef JERRY_ENABLE_EXTERNAL_CONTEXT
 /**
  * Check size of heap is corresponding to configuration
  */
 JERRY_STATIC_ASSERT (sizeof (jmem_heap_t) <= JMEM_HEAP_SIZE,
                      size_of_mem_heap_must_be_less_than_or_equal_to_MEM_HEAP_SIZE);
+#endif /* !JERRY_ENABLE_EXTERNAL_CONTEXT */
 
 #ifdef JMEM_STATS
 
@@ -148,8 +150,8 @@ void
 jmem_heap_init (void)
 {
 #ifndef JERRY_CPOINTER_32_BIT
-  JERRY_STATIC_ASSERT (((UINT16_MAX + 1) << JMEM_ALIGNMENT_LOG) >= JMEM_HEAP_SIZE,
-                       maximum_heap_size_for_16_bit_compressed_pointers_is_512K);
+  /* the maximum heap size for 16bit compressed pointers should be 512K */
+  JERRY_ASSERT (((UINT16_MAX + 1) << JMEM_ALIGNMENT_LOG) >= JMEM_HEAP_SIZE);
 #endif /* !JERRY_CPOINTER_32_BIT */
 
 #ifndef JERRY_SYSTEM_ALLOCATOR
@@ -181,7 +183,7 @@ jmem_heap_finalize (void)
 {
   JERRY_ASSERT (JERRY_CONTEXT (jmem_heap_allocated_size) == 0);
 #ifndef JERRY_SYSTEM_ALLOCATOR
-  VALGRIND_NOACCESS_SPACE (&JERRY_HEAP_CONTEXT (first), sizeof (jmem_heap_t));
+  VALGRIND_NOACCESS_SPACE (&JERRY_HEAP_CONTEXT (first), JMEM_HEAP_SIZE);
 #endif /* !JERRY_SYSTEM_ALLOCATOR */
 } /* jmem_heap_finalize */
 

jerry-core/jmem/jmem.h

@@ -25,10 +25,12 @@
  * @{
  */
 
+#ifndef JERRY_ENABLE_EXTERNAL_CONTEXT
 /**
  * Size of heap
  */
 #define JMEM_HEAP_SIZE ((size_t) (CONFIG_MEM_HEAP_AREA_SIZE))
+#endif /* !JERRY_ENABLE_EXTERNAL_CONTEXT */
 
 /**
  * Logarithm of required alignment for allocated units/blocks