diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3cc1bb83c..39203a85b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -58,9 +58,10 @@ project (Jerry CXX C ASM)
  set(CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS )
 
 # Defining options
- option(ENABLE_VALGRIND "Enable valgrind helpers in memory allocators" OFF)
- option(ENABLE_LTO      "Enable LTO build" ON)
- option(ENABLE_LOG      "Enable LOG build" OFF)
+ option(ENABLE_VALGRIND       "Enable valgrind helpers in memory allocators" OFF)
+ option(ENABLE_VALGRIND_FREYA "Enable valgrind-freya helpers in memory allocators" OFF)
+ option(ENABLE_LTO            "Enable LTO build" ON)
+ option(ENABLE_LOG            "Enable LOG build" OFF)
 
  if("${PLATFORM}" STREQUAL "LINUX")
   set(PLATFORM_EXT "LINUX")
diff --git a/Makefile b/Makefile
index 575d1a438..45dacff7c 100644
--- a/Makefile
+++ b/Makefile
@@ -49,6 +49,13 @@
    VALGRIND := OFF
   endif
 
+ # Valgrind Freya
+  VALGRIND_FREYA ?= OFF
+
+  ifneq ($(VALGRIND_FREYA),ON)
+   VALGRIND_FREYA := OFF
+  endif
+
  # Static checkers
   STATIC_CHECK ?= OFF
 
@@ -132,10 +139,11 @@ export SHELL=/bin/bash
 
 # Building all options combinations
  OPTIONS_COMBINATIONS := $(foreach __OPTION,ON OFF,$(__COMBINATION)-VALGRIND-$(__OPTION))
+ OPTIONS_COMBINATIONS := $(foreach __COMBINATION,$(OPTIONS_COMBINATIONS),$(foreach __OPTION,ON OFF,$(__COMBINATION)-VALGRIND_FREYA-$(__OPTION)))
  OPTIONS_COMBINATIONS := $(foreach __COMBINATION,$(OPTIONS_COMBINATIONS),$(foreach __OPTION,ON OFF,$(__COMBINATION)-LTO-$(__OPTION)))
 
 # Building current options string
- OPTIONS_STRING := -VALGRIND-$(VALGRIND)-LTO-$(LTO)
+ OPTIONS_STRING := -VALGRIND-$(VALGRIND)-VALGRIND_FREYA-$(VALGRIND_FREYA)-LTO-$(LTO)
 
 # Build directories
  BUILD_DIR_PREFIX := ./build/obj
@@ -179,6 +187,7 @@ $(BUILD_DIRS_NATIVE):
 	$(Q) cd $@ && \
           (cmake \
              -DENABLE_VALGRIND=$(VALGRIND) \
+             -DENABLE_VALGRIND_FREYA=$(VALGRIND_FREYA) \
              -DENABLE_LOG=$(LOG) \
              -DENABLE_LTO=$(LTO) \
              -DUSE_COMPILER_DEFAULT_LIBC=$(USE_COMPILER_DEFAULT_LIBC) \
@@ -189,14 +198,14 @@ $(BUILD_DIRS_NATIVE):
 $(BUILD_DIRS_STM32F3): prerequisites
 	$(Q) mkdir -p $@
 	$(Q) cd $@ && \
-          (cmake -DENABLE_VALGRIND=$(VALGRIND) -DENABLE_LTO=$(LTO) -DCMAKE_TOOLCHAIN_FILE=build/configs/toolchain_mcu_stm32f3.cmake ../../.. 2>&1 | tee cmake.log $(QLOG) ; ( exit $${PIPESTATUS[0]} ) ) || \
+          (cmake -DENABLE_VALGRIND=$(VALGRIND) -DENABLE_VALGRIND_FREYA=$(VALGRIND_FREYA) -DENABLE_LTO=$(LTO) -DCMAKE_TOOLCHAIN_FILE=build/configs/toolchain_mcu_stm32f3.cmake ../../.. 2>&1 | tee cmake.log $(QLOG) ; ( exit $${PIPESTATUS[0]} ) ) || \
           (echo "CMake run failed. See "`pwd`"/cmake.log for details."; exit 1;)
 
 .PHONY: $(BUILD_DIRS_STM32F4)
 $(BUILD_DIRS_STM32F4): prerequisites
 	$(Q) mkdir -p $@
 	$(Q) cd $@ && \
-          (cmake -DENABLE_VALGRIND=$(VALGRIND) -DENABLE_LTO=$(LTO) -DCMAKE_TOOLCHAIN_FILE=build/configs/toolchain_mcu_stm32f4.cmake ../../.. 2>&1 | tee cmake.log $(QLOG) ; ( exit $${PIPESTATUS[0]} ) ) || \
+          (cmake -DENABLE_VALGRIND=$(VALGRIND) -DENABLE_VALGRIND_FREYA=$(VALGRIND_FREYA) -DENABLE_LTO=$(LTO) -DCMAKE_TOOLCHAIN_FILE=build/configs/toolchain_mcu_stm32f4.cmake ../../.. 2>&1 | tee cmake.log $(QLOG) ; ( exit $${PIPESTATUS[0]} ) ) || \
           (echo "CMake run failed. See "`pwd`"/cmake.log for details."; exit 1;)
 
 .PHONY: $(JERRY_NATIVE_TARGETS)
diff --git a/jerry-core/CMakeLists.txt b/jerry-core/CMakeLists.txt
index 3699c1468..599b08e39 100644
--- a/jerry-core/CMakeLists.txt
+++ b/jerry-core/CMakeLists.txt
@@ -81,6 +81,9 @@ project (JerryCore CXX C ASM)
  # Valgrind
   set(DEFINES_JERRY_VALGRIND JERRY_VALGRIND)
 
+ # Valgrind Freya
+  set(DEFINES_JERRY_VALGRIND_FREYA JERRY_VALGRIND_FREYA)
+
  # Platform-specific
   # Linux
 
@@ -154,6 +157,12 @@ project (JerryCore CXX C ASM)
   set(INCLUDE_CORE ${INCLUDE_CORE} ${INCLUDE_THIRD_PARTY_VALGRIND})
  endif()
 
+ # Valgrind Freya
+ if("${ENABLE_VALGRIND_FREYA}" STREQUAL "ON")
+  set(DEFINES_JERRY ${DEFINES_JERRY} ${DEFINES_JERRY_VALGRIND_FREYA})
+  set(INCLUDE_CORE ${INCLUDE_CORE} ${INCLUDE_THIRD_PARTY_VALGRIND})
+ endif()
+
  # Log
   if("${ENABLE_LOG}" STREQUAL "ON")
    set(DEFINES_JERRY ${DEFINES_JERRY} JERRY_ENABLE_LOG)
diff --git a/jerry-core/mem/mem-heap.cpp b/jerry-core/mem/mem-heap.cpp
index 8e6c61e1e..d778db331 100644
--- a/jerry-core/mem/mem-heap.cpp
+++ b/jerry-core/mem/mem-heap.cpp
@@ -41,15 +41,54 @@
 #ifdef JERRY_VALGRIND
 # include "memcheck.h"
 
-# 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_SPACE(p, s)   (void)VALGRIND_MAKE_MEM_DEFINED((p), (s))
+# define VALGRIND_NOACCESS_SPACE(p, s)   VALGRIND_MAKE_MEM_NOACCESS((p), (s))
+# define VALGRIND_UNDEFINED_SPACE(p, s)  VALGRIND_MAKE_MEM_UNDEFINED((p), (s))
+# define VALGRIND_DEFINED_SPACE(p, s)    VALGRIND_MAKE_MEM_DEFINED((p), (s))
+
 #else /* JERRY_VALGRIND */
 # define VALGRIND_NOACCESS_SPACE(p, s)
 # define VALGRIND_UNDEFINED_SPACE(p, s)
 # define VALGRIND_DEFINED_SPACE(p, s)
 #endif /* JERRY_VALGRIND */
 
+#ifdef JERRY_VALGRIND_FREYA
+# include "memcheck.h"
+
+/**
+ * Tells whether a pool manager allocator request is in progress.
+ */
+static bool valgrind_freya_mempool_request = false;
+
+/**
+ * Called by pool manager before a heap allocation or free.
+ */
+void mem_heap_valgrind_freya_mempool_request (void)
+{
+  valgrind_freya_mempool_request = true;
+} /* mem_heap_valgrind_freya_mempool_request */
+
+# define VALGRIND_FREYA_CHECK_MEMPOOL_REQUEST \
+  bool mempool_request = valgrind_freya_mempool_request; \
+  valgrind_freya_mempool_request = false
+
+# define VALGRIND_FREYA_MALLOCLIKE_SPACE(p, s) \
+  if (!mempool_request) \
+  { \
+    VALGRIND_MALLOCLIKE_BLOCK((p), (s), 0, 0); \
+  }
+
+# define VALGRIND_FREYA_FREELIKE_SPACE(p) \
+  if (!mempool_request) \
+  { \
+    VALGRIND_FREELIKE_BLOCK((p), 0); \
+  }
+
+#else /* JERRY_VALGRIND_FREYA */
+# define VALGRIND_FREYA_CHECK_MEMPOOL_REQUEST
+# define VALGRIND_FREYA_MALLOCLIKE_SPACE(p, s)
+# define VALGRIND_FREYA_FREELIKE_SPACE(p)
+#endif /* JERRY_VALGRIND_FREYA */
+
 /**
  * Length type of the block
  */
@@ -489,6 +528,8 @@ mem_heap_alloc_block_try_give_memory_back (size_t size_in_bytes, /**< size of re
                                                                                  *   (one-chunked or general) */
                                            mem_heap_alloc_term_t alloc_term) /**< expected allocation term */
 {
+  VALGRIND_FREYA_CHECK_MEMPOOL_REQUEST;
+
 #ifdef MEM_GC_BEFORE_EACH_ALLOC
   mem_run_try_to_give_memory_back_callbacks (MEM_TRY_GIVE_MEMORY_BACK_SEVERITY_CRITICAL);
 #endif /* MEM_GC_BEFORE_EACH_ALLOC */
@@ -503,6 +544,7 @@ mem_heap_alloc_block_try_give_memory_back (size_t size_in_bytes, /**< size of re
 
   if (likely (data_space_p != NULL))
   {
+    VALGRIND_FREYA_MALLOCLIKE_SPACE (data_space_p, size_in_bytes);
     return data_space_p;
   }
 
@@ -516,6 +558,7 @@ mem_heap_alloc_block_try_give_memory_back (size_t size_in_bytes, /**< size of re
 
     if (data_space_p != NULL)
     {
+      VALGRIND_FREYA_MALLOCLIKE_SPACE (data_space_p, size_in_bytes);
       return data_space_p;
     }
   }
@@ -580,6 +623,8 @@ mem_heap_alloc_chunked_block (mem_heap_alloc_term_t alloc_term) /**< expected al
 void
 mem_heap_free_block (void *ptr) /**< pointer to beginning of data space of the block */
 {
+  VALGRIND_FREYA_CHECK_MEMPOOL_REQUEST;
+
   uint8_t *uint8_ptr = (uint8_t*) ptr;
 
   /* checking that uint8_ptr points to the heap */
@@ -661,6 +706,7 @@ mem_heap_free_block (void *ptr) /**< pointer to beginning of data space of the b
   VALGRIND_CHECK_MEM_IS_ADDRESSABLE (ptr, mem_heap_allocated_bytes[chunk_index]);
 #endif /* JERRY_VALGRIND */
 
+  VALGRIND_FREYA_FREELIKE_SPACE (ptr);
   VALGRIND_NOACCESS_SPACE (ptr, chunks * MEM_HEAP_CHUNK_SIZE);
 
   JERRY_ASSERT (mem_heap_allocated_chunks >= chunks);
diff --git a/jerry-core/mem/mem-heap.h b/jerry-core/mem/mem-heap.h
index 5715e3e66..72c67dfce 100644
--- a/jerry-core/mem/mem-heap.h
+++ b/jerry-core/mem/mem-heap.h
@@ -83,6 +83,22 @@ extern void mem_heap_get_stats (mem_heap_stats_t *);
 extern void mem_heap_stats_reset_peak (void);
 #endif /* MEM_STATS */
 
+#ifdef JERRY_VALGRIND_FREYA
+
+#ifdef JERRY_VALGRIND
+#error Valgrind and valgrind-freya modes are not compatible.
+#endif
+
+extern void mem_heap_valgrind_freya_mempool_request (void);
+
+#define MEM_HEAP_VALGRIND_FREYA_MEMPOOL_REQUEST() mem_heap_valgrind_freya_mempool_request ()
+
+#else /* JERRY_VALGRIND_FREYA */
+
+#define MEM_HEAP_VALGRIND_FREYA_MEMPOOL_REQUEST()
+
+#endif /* JERRY_VALGRIND_FREYA */
+
 /**
  * Define a local array variable and allocate memory for the array on the heap.
  *
diff --git a/jerry-core/mem/mem-poolman.cpp b/jerry-core/mem/mem-poolman.cpp
index 96ff7ed29..239cbfa87 100644
--- a/jerry-core/mem/mem-poolman.cpp
+++ b/jerry-core/mem/mem-poolman.cpp
@@ -136,15 +136,25 @@ static void mem_pools_stat_free_chunk (void);
 #ifdef JERRY_VALGRIND
 # include "memcheck.h"
 
-# 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_SPACE(p, s)   (void)VALGRIND_MAKE_MEM_DEFINED((p), (s))
+# define VALGRIND_NOACCESS_SPACE(p, s)   VALGRIND_MAKE_MEM_NOACCESS((p), (s))
+# define VALGRIND_UNDEFINED_SPACE(p, s)  VALGRIND_MAKE_MEM_UNDEFINED((p), (s))
+# define VALGRIND_DEFINED_SPACE(p, s)    VALGRIND_MAKE_MEM_DEFINED((p), (s))
 #else /* JERRY_VALGRIND */
 # define VALGRIND_NOACCESS_SPACE(p, s)
 # define VALGRIND_UNDEFINED_SPACE(p, s)
 # define VALGRIND_DEFINED_SPACE(p, s)
 #endif /* JERRY_VALGRIND */
 
+#ifdef JERRY_VALGRIND_FREYA
+# include "memcheck.h"
+
+# define VALGRIND_FREYA_MALLOCLIKE_SPACE(p, s) VALGRIND_MALLOCLIKE_BLOCK((p), (s), 0, 0)
+# define VALGRIND_FREYA_FREELIKE_SPACE(p)      VALGRIND_FREELIKE_BLOCK((p), 0)
+#else /* JERRY_VALGRIND_FREYA */
+# define VALGRIND_FREYA_MALLOCLIKE_SPACE(p, s)
+# define VALGRIND_FREYA_FREELIKE_SPACE(p)
+#endif /* JERRY_VALGRIND_FREYA */
+
 /**
  * Initialize pool manager
  */
@@ -391,6 +401,7 @@ mem_pools_collect_empty (void)
         mem_free_chunks_number -= MEM_POOL_CHUNKS_NUMBER;
 #endif /* !JERRY_NDEBUG */
 
+        MEM_HEAP_VALGRIND_FREYA_MEMPOOL_REQUEST ();
         mem_heap_free_block (pool_list_iter_p);
 
         MEM_POOLS_STAT_FREE_POOL ();
@@ -455,11 +466,13 @@ mem_pools_alloc_longpath (void)
   JERRY_ASSERT (MEM_POOL_SIZE <= mem_heap_get_chunked_block_data_size ());
   JERRY_ASSERT (MEM_POOL_CHUNKS_NUMBER >= 1);
 
+  MEM_HEAP_VALGRIND_FREYA_MEMPOOL_REQUEST ();
   mem_pool_chunk_t *pool_start_p = (mem_pool_chunk_t*) mem_heap_alloc_chunked_block (MEM_HEAP_ALLOC_LONG_TERM);
 
   if (mem_free_chunk_p != NULL)
   {
     /* some chunks were freed due to GC invoked by heap allocator */
+    MEM_HEAP_VALGRIND_FREYA_MEMPOOL_REQUEST ();
     mem_heap_free_block (pool_start_p);
 
     return;
@@ -549,6 +562,7 @@ mem_pools_alloc (void)
 
       mem_check_pools ();
 
+      VALGRIND_FREYA_MALLOCLIKE_SPACE (chunk_p, MEM_POOL_CHUNK_SIZE);
       return (uint8_t *) chunk_p;
     }
     else
@@ -574,6 +588,7 @@ mem_pools_free (uint8_t *chunk_p) /**< pointer to the chunk */
   chunk_to_free_p->u.free.next_p = mem_free_chunk_p;
   mem_free_chunk_p = chunk_to_free_p;
 
+  VALGRIND_FREYA_FREELIKE_SPACE (chunk_to_free_p);
   VALGRIND_NOACCESS_SPACE (chunk_to_free_p, MEM_POOL_CHUNK_SIZE);
 
 #ifndef JERRY_NDEBUG