From ae436d1aed365f5a305c9f267ba7bd589f991784 Mon Sep 17 00:00:00 2001
From: Ruben Ayrapetyan <r.ayrapetyan@samsung.com>
Date: Thu, 23 Apr 2015 15:35:35 +0300
Subject: [PATCH 01/14] Supporting build with gcc/g++ version 4.7.

Build was tested on arm-linux-gnueabi-gcc/g++ 4.7.3.

JerryScript-DCO-1.0-Signed-off-by: Ruben Ayrapetyan r.ayrapetyan@samsung.com
---
 CMakeLists.txt                   | 27 +++++++++++++++++++++------
 jerry-core/jerry-extension.inc.h | 10 +++++-----
 jerry-core/mem/mem-pool.h        |  4 ++--
 jerry-core/parser/js/lexer.h     |  2 +-
 4 files changed, 29 insertions(+), 14 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5c68467932..c0f1f09488 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -15,7 +15,7 @@
 cmake_minimum_required (VERSION 2.8.12)
 project (Jerry CXX C ASM)
 
-# Require g++ of version >= 4.8.0
+# Require g++ of version >= 4.7.0
  if(NOT CMAKE_COMPILER_IS_GNUCXX)
   message(FATAL_ERROR "g++ compiler is required")
  else()
@@ -23,8 +23,8 @@ project (Jerry CXX C ASM)
                   OUTPUT_VARIABLE GNU_CXX_VERSION
                   OUTPUT_STRIP_TRAILING_WHITESPACE)
 
-  if(${GNU_CXX_VERSION} VERSION_LESS 4.8.0)
-   message(FATAL_ERROR "g++ compiler version 4.8.0 or higher required")
+  if(${GNU_CXX_VERSION} VERSION_LESS 4.7.0)
+   message(FATAL_ERROR "g++ compiler version 4.7.0 or higher required")
   endif()
  endif()
 
@@ -177,7 +177,7 @@ project (Jerry CXX C ASM)
   set(COMPILE_FLAGS_JERRY "${COMPILE_FLAGS_JERRY} -g -gdwarf-4")
 
  # Warnings
-  set(COMPILE_FLAGS_JERRY "${COMPILE_FLAGS_JERRY} -Wall -Wextra -Wpedantic -Wlogical-op")
+  set(COMPILE_FLAGS_JERRY "${COMPILE_FLAGS_JERRY} -Wall -Wextra -pedantic -Wlogical-op")
   set(COMPILE_FLAGS_JERRY "${COMPILE_FLAGS_JERRY} -Wformat-nonliteral -Winit-self -Wno-stack-protector")
   set(COMPILE_FLAGS_JERRY "${COMPILE_FLAGS_JERRY} -Wconversion -Wsign-conversion -Wformat-security")
   set(COMPILE_FLAGS_JERRY "${COMPILE_FLAGS_JERRY} -Wmissing-declarations -Wno-attributes")
@@ -250,6 +250,19 @@ project (Jerry CXX C ASM)
                   OUTPUT_STRIP_TRAILING_WHITESPACE)
   set_property(TARGET ${PREFIX_IMPORTED_LIB}libgcc
                PROPERTY IMPORTED_LOCATION ${IMPORTED_LIBGCC_LOCATION})
+ # libgcc_eh
+  add_library(${PREFIX_IMPORTED_LIB}libgcc_eh STATIC IMPORTED)
+  execute_process(COMMAND ${CMAKE_C_COMPILER} ${FLAGS_COMMON_ARCH} -print-file-name=libgcc_eh.a
+                  OUTPUT_VARIABLE IMPORTED_LIBGCC_EH_LOCATION
+                  OUTPUT_STRIP_TRAILING_WHITESPACE)
+  if(EXISTS "${IMPORTED_LIBGCC_EH_LOCATION}")
+   set_property(TARGET ${PREFIX_IMPORTED_LIB}libgcc_eh
+                PROPERTY IMPORTED_LOCATION ${IMPORTED_LIBGCC_EH_LOCATION})
+  else()
+   # If libgcc_eh not found, reference libgcc instead
+   set_property(TARGET ${PREFIX_IMPORTED_LIB}libgcc_eh
+                PROPERTY IMPORTED_LOCATION ${IMPORTED_LIBGCC_LOCATION})
+  endif()
 
 # Platform-specific configuration
  set(MODIFIERS_LISTS ${MODIFIERS_LISTS_${PLATFORM_EXT}})
@@ -307,7 +320,8 @@ project (Jerry CXX C ASM)
     target_compile_definitions(${TARGET_NAME} PRIVATE ${DEFINES_JERRY})
     target_include_directories(${TARGET_NAME} PRIVATE ${INCLUDE_CORE_INTERFACE})
     target_include_directories(${TARGET_NAME} SYSTEM PRIVATE ${INCLUDE_LIBC_INTERFACE})
-    target_link_libraries(${TARGET_NAME} ${PLUGINS_TARGET_NAME} ${CORE_TARGET_NAME} ${LIBC_TARGET_NAME} ${PREFIX_IMPORTED_LIB}libgcc)
+    target_link_libraries(${TARGET_NAME} ${PLUGINS_TARGET_NAME} ${CORE_TARGET_NAME} ${LIBC_TARGET_NAME}
+                          ${PREFIX_IMPORTED_LIB}libgcc ${PREFIX_IMPORTED_LIB}libgcc_eh)
 
     add_cppcheck_target(${TARGET_NAME})
 
@@ -387,7 +401,8 @@ project (Jerry CXX C ASM)
     set_property(TARGET ${TARGET_NAME}
                  PROPERTY LINK_FLAGS "${COMPILE_FLAGS_JERRY} ${CXX_FLAGS_JERRY} ${FLAGS_COMMON_UNITTESTS} ${LINKER_FLAGS_COMMON}")
     target_include_directories(${TARGET_NAME} PRIVATE ${INCLUDE_CORE_INTERFACE})
-    target_link_libraries(${TARGET_NAME} ${CORE_TARGET_NAME} ${PREFIX_IMPORTED_LIB}libc ${PREFIX_IMPORTED_LIB}libgcc)
+    target_link_libraries(${TARGET_NAME} ${CORE_TARGET_NAME} ${PREFIX_IMPORTED_LIB}libc
+                          ${PREFIX_IMPORTED_LIB}libgcc ${PREFIX_IMPORTED_LIB}libgcc_eh)
 
     add_cppcheck_target(${TARGET_NAME})
 
diff --git a/jerry-core/jerry-extension.inc.h b/jerry-core/jerry-extension.inc.h
index b34265b808..2ea5b6cce9 100644
--- a/jerry-core/jerry-extension.inc.h
+++ b/jerry-core/jerry-extension.inc.h
@@ -39,10 +39,10 @@ enum
 static const jerry_extension_field_t jerry_extension_fields [JERRY_EXTENSION_FIELDS_NUMBER + 1] =
 {
 #define EXTENSION_FIELD(_field_name, _type, _value) \
-  { # _field_name, JERRY_API_DATA_TYPE_ ## _type, _value },
+  { # _field_name, JERRY_API_DATA_TYPE_ ## _type, { _value } },
 # include EXTENSION_DESCRIPTION_HEADER
 #undef EXTENSION_FIELD
-#define EMPTY_FIELD_ENTRY { NULL, JERRY_API_DATA_TYPE_UNDEFINED, NULL }
+#define EMPTY_FIELD_ENTRY { NULL, JERRY_API_DATA_TYPE_UNDEFINED, { NULL } }
   EMPTY_FIELD_ENTRY
 #undef EMPTY_FIELD_ENTRY
 };
@@ -87,7 +87,7 @@ static const jerry_extension_field_t jerry_extension_fields [JERRY_EXTENSION_FIE
 /* Functions' arguments description */
 #define EXTENSION_ARG(_arg_index, _type) [_arg_index] = { \
   (JERRY_API_DATA_TYPE_ ## _type), \
-  false /* just for initialization, should be overwritten upon call */ \
+  { false } /* just for initialization, should be overwritten upon call */ \
 }
 #define EXTENSION_FUNCTION(_function_name, _function_to_call, _ret_value_type, _args_number, ...) \
   static jerry_api_value_t jerry_extension_function_ ## _function_name ## _args [_args_number] = { \
@@ -103,13 +103,13 @@ static jerry_extension_function_t jerry_extension_functions [JERRY_EXTENSION_FUN
 #define EXTENSION_FUNCTION(_function_name, _function_to_call, _ret_value_type, _args_number, ...) \
   {  \
     # _function_name, jerry_extension_ ## _function_name ## _wrapper, \
-    { JERRY_API_DATA_TYPE_ ## _ret_value_type, false }, \
+    { JERRY_API_DATA_TYPE_ ## _ret_value_type, { false } }, \
     jerry_extension_function_ ## _function_name ## _args, \
      _args_number \
   },
 # include EXTENSION_DESCRIPTION_HEADER
 #undef EXTENSION_FUNCTION
-#define EMPTY_FUNCTION_ENTRY { NULL, NULL, { JERRY_API_DATA_TYPE_VOID, false }, NULL, 0 }
+#define EMPTY_FUNCTION_ENTRY { NULL, NULL, { JERRY_API_DATA_TYPE_VOID, { false } }, NULL, 0 }
   EMPTY_FUNCTION_ENTRY
 #undef EMPTY_FUNCTION_ENTRY
 };
diff --git a/jerry-core/mem/mem-pool.h b/jerry-core/mem/mem-pool.h
index 64cdfbca02..c37bef11d8 100644
--- a/jerry-core/mem/mem-pool.h
+++ b/jerry-core/mem/mem-pool.h
@@ -59,10 +59,10 @@ typedef uint8_t mem_pool_chunk_index_t;
 typedef struct __attribute__ ((aligned (MEM_ALIGNMENT))) mem_pool_state_t
 {
   /** Offset of first free chunk from the beginning of the pool (mem_pool_chunk_index_t) */
-  unsigned int first_free_chunk : MEM_POOL_MAX_CHUNKS_NUMBER_LOG;
+  mem_pool_chunk_index_t first_free_chunk : MEM_POOL_MAX_CHUNKS_NUMBER_LOG;
 
   /** Number of free chunks (mem_pool_chunk_index_t) */
-  unsigned int free_chunks_number : MEM_POOL_MAX_CHUNKS_NUMBER_LOG;
+  mem_pool_chunk_index_t free_chunks_number : MEM_POOL_MAX_CHUNKS_NUMBER_LOG;
 
   /** Pointer to the next pool with same chunk size */
   mem_cpointer_t next_pool_cp : MEM_COMPRESSED_POINTER_WIDTH;
diff --git a/jerry-core/parser/js/lexer.h b/jerry-core/parser/js/lexer.h
index 40b3e4009b..b9b0f5345f 100644
--- a/jerry-core/parser/js/lexer.h
+++ b/jerry-core/parser/js/lexer.h
@@ -19,7 +19,7 @@
 #include "literal.h"
 
 #define INVALID_VALUE 255
-#define INVALID_LITERAL UINT32_MAX
+#define INVALID_LITERAL ((uint32_t) -1)
 
 /* Keywords.  */
 typedef enum __attr_packed___

From 728ec47333ae81d8444cced0c9cae4ec05c1a673 Mon Sep 17 00:00:00 2001
From: Ruben Ayrapetyan <r.ayrapetyan@samsung.com>
Date: Thu, 23 Apr 2015 15:50:58 +0300
Subject: [PATCH 02/14] Splitting --mem-stats option to --mem-stats-at-exit and
 --mem-stats-per-opcode.

JerryScript-DCO-1.0-Signed-off-by: Ruben Ayrapetyan r.ayrapetyan@samsung.com
---
 jerry-core/jerry.cpp |  9 +++++----
 jerry-core/jerry.h   | 13 +++++++------
 main-linux.cpp       |  8 ++++++--
 main-nuttx.cpp       |  8 ++++++--
 4 files changed, 24 insertions(+), 14 deletions(-)

diff --git a/jerry-core/jerry.cpp b/jerry-core/jerry.cpp
index 4220bf1c7c..8ece823a8c 100644
--- a/jerry-core/jerry.cpp
+++ b/jerry-core/jerry.cpp
@@ -904,7 +904,7 @@ jerry_init (jerry_flag_t flags) /**< combination of Jerry flags */
   jerry_flags = flags;
 
 #ifndef MEM_STATS
-  if (flags & JERRY_FLAG_MEM_STATS)
+  if (flags & (JERRY_FLAG_MEM_STATS_AT_EXIT | JERRY_FLAG_MEM_STATS_PER_OPCODE))
   {
     printf ("Ignoring memory statistics option because of '!MEM_STATS' build configuration.\n");
   }
@@ -921,7 +921,7 @@ jerry_init (jerry_flag_t flags) /**< combination of Jerry flags */
 void
 jerry_cleanup (void)
 {
-  bool is_show_mem_stats = ((jerry_flags & JERRY_FLAG_MEM_STATS) != 0);
+  bool is_show_mem_stats = ((jerry_flags & JERRY_FLAG_MEM_STATS_AT_EXIT) != 0);
 
   ecma_finalize ();
   serializer_free ();
@@ -966,8 +966,9 @@ jerry_parse (const char* source_p, /**< script source */
   serializer_print_opcodes ();
   parser_free ();
 
-  bool is_show_mem_stats = ((jerry_flags & JERRY_FLAG_MEM_STATS) != 0);
-  init_int (opcodes, is_show_mem_stats);
+  bool is_show_mem_stats_per_opcode = ((jerry_flags & JERRY_FLAG_MEM_STATS_PER_OPCODE) != 0);
+
+  init_int (opcodes, is_show_mem_stats_per_opcode);
 
   return true;
 } /* jerry_parse */
diff --git a/jerry-core/jerry.h b/jerry-core/jerry.h
index b373d4f925..7df750a315 100644
--- a/jerry-core/jerry.h
+++ b/jerry-core/jerry.h
@@ -31,12 +31,13 @@
  */
 typedef uint32_t jerry_flag_t;
 
-#define JERRY_FLAG_EMPTY        (0)      /**< empty flag set */
-#define JERRY_FLAG_SHOW_OPCODES (1 << 0) /**< dump opcodes to stdout after parse */
-#define JERRY_FLAG_MEM_STATS    (1 << 1) /**< dump per-opcode memory statistics during execution
-                                          *   (in the mode full GC is performed after each opcode handler) */
-#define JERRY_FLAG_PARSE_ONLY   (1 << 2) /**< parse only, prevents script execution (only for testing)
-                                          *   FIXME: Remove. */
+#define JERRY_FLAG_EMPTY                  (0)      /**< empty flag set */
+#define JERRY_FLAG_SHOW_OPCODES           (1 << 0) /**< dump opcodes to stdout after parse */
+#define JERRY_FLAG_MEM_STATS_AT_EXIT      (1 << 1) /**< dump per-opcode memory statistics during execution
+                                                    *   (in the mode full GC is performed after each opcode handler) */
+#define JERRY_FLAG_MEM_STATS_PER_OPCODE   (1 << 2) /**< dump peak memory statistics before exit */
+#define JERRY_FLAG_PARSE_ONLY             (1 << 3) /**< parse only, prevents script execution (only for testing)
+                                                    *   FIXME: Remove. */
 
 /**
  * Error codes
diff --git a/main-linux.cpp b/main-linux.cpp
index 8a49cec643..de0a2f4780 100644
--- a/main-linux.cpp
+++ b/main-linux.cpp
@@ -139,9 +139,13 @@ main (int argc,
       printf ("Branch name:\t%s\n", jerry_branch_name);
       printf ("\n");
     }
-    else if (!strcmp ("--mem-stats", argv[i]))
+    else if (!strcmp ("--mem-stats-at-exit", argv[i]))
     {
-      flags |= JERRY_FLAG_MEM_STATS;
+      flags |= JERRY_FLAG_MEM_STATS_AT_EXIT;
+    }
+    else if (!strcmp ("--mem-stats-per-opcode", argv[i]))
+    {
+      flags |= JERRY_FLAG_MEM_STATS_PER_OPCODE;
     }
     else if (!strcmp ("--parse-only", argv[i]))
     {
diff --git a/main-nuttx.cpp b/main-nuttx.cpp
index 04fbaf9453..9e2dc342aa 100644
--- a/main-nuttx.cpp
+++ b/main-nuttx.cpp
@@ -146,9 +146,13 @@ int jerry_main (int argc, char *argv[])
       printf ("Commit hash:\t%s\n", jerry_commit_hash);
       printf ("Branch name:\t%s\n", jerry_branch_name);
     }
-    else if (!strcmp ("--mem-stats", argv[i]))
+    else if (!strcmp ("--mem-stats-at-exit", argv[i]))
     {
-      flags |= JERRY_FLAG_MEM_STATS;
+      flags |= JERRY_FLAG_MEM_STATS_AT_EXIT;
+    }
+    else if (!strcmp ("--mem-stats-per-opcode", argv[i]))
+    {
+      flags |= JERRY_FLAG_MEM_STATS_PER_OPCODE;
     }
     else if (!strcmp ("--parse-only", argv[i]))
     {

From 32e02681b03723a6f6d36392455706ffc066ae89 Mon Sep 17 00:00:00 2001
From: Ruben Ayrapetyan <r.ayrapetyan@samsung.com>
Date: Fri, 24 Apr 2015 13:16:36 +0300
Subject: [PATCH 03/14] Making data and stack non-executable.

JerryScript-DCO-1.0-Signed-off-by: Ruben Ayrapetyan r.ayrapetyan@samsung.com
---
 CMakeLists.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index c0f1f09488..502515f8af 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -162,7 +162,7 @@ project (Jerry CXX C ASM)
 
 # Compiler / Linker flags
  set(COMPILE_FLAGS_JERRY "-fno-builtin")
- set(LINKER_FLAGS_COMMON "")
+ set(LINKER_FLAGS_COMMON "-Wl,-z,noexecstack")
 
  # LTO
   if("${ENABLE_LTO}" STREQUAL "ON")

From 41d585cf22de66a9b5816eba222f5f8dba7c999f Mon Sep 17 00:00:00 2001
From: Ruben Ayrapetyan <r.ayrapetyan@samsung.com>
Date: Fri, 24 Apr 2015 13:15:10 +0300
Subject: [PATCH 04/14] Removing measurements of metrics other than maximum RSS
 of non-executable areas from tools/rss_measure.sh.

JerryScript-DCO-1.0-Signed-off-by: Ruben Ayrapetyan r.ayrapetyan@samsung.com
---
 tools/rss-measure.sh | 78 +++-----------------------------------------
 1 file changed, 5 insertions(+), 73 deletions(-)

diff --git a/tools/rss-measure.sh b/tools/rss-measure.sh
index b590acdba2..a9dd85f736 100755
--- a/tools/rss-measure.sh
+++ b/tools/rss-measure.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 
-# Copyright 2014 Samsung Electronics Co., Ltd.
+# Copyright 2014-2015 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.
@@ -16,27 +16,16 @@
 
 JERRY=$1
 TEST=$2
-RAW_OUTPUT=$3
-SLEEP=0.3
-REPEATS=5
-
+SLEEP=0.1
 
 Rss_OUT=""
-Pss_OUT=""
-Private_Dirty_OUT=""
-Private_Clean_OUT=""
-Shared_Dirty_OUT=""
-Shared_Clean_OUT=""
-Share_OUT=""
-Size_OUT=""
-Swap_OUT=""
 
 function collect_entry()
 {
   OUT_NAME="$1_OUT";
   OUT=$OUT_NAME;
 
-  SUM=$(cat /proc/"$PID"/smaps 2>/dev/null | grep "$1" | awk '{sum += $2;} END { if (sum != 0) { print sum; }; }');
+  SUM=$(grep -o -e "^[0-9a-f][0-9a-f]*.*" -e "^Rss.*" /proc/$PID/smaps 2>/dev/null | grep -A 1 -- "r[w-]-p " | grep "^Rss"|awk '{s += $2;} END {print s;}')
 
   if [ "$SUM" != "" ];
   then
@@ -49,7 +38,7 @@ function print_entry()
   OUT_NAME="$1_OUT";
   OUT=$OUT_NAME;
 
-  eval "echo -e \"\$$OUT\"" | awk -v entry="$1" '{ if ($1 != "") { sum += $1; n += 1; if ($1 > max) { max = $1; } } } END { if (n == 0) { exit; }; printf "%19s:%8d Kb%19s:%8d Kb\n", entry, sum / n, entry, max; }';
+  eval "echo -e \"\$$OUT\"" | awk -v entry="$1" '{ if ($1 != "") { n += 1; if ($1 > max) { max = $1; } } } END { if (n == 0) { exit; }; printf "%s:%8d Kb\n", entry,  max; }';
 }
 
 function run_test()
@@ -60,68 +49,11 @@ function run_test()
   while kill -0 "$PID" > /dev/null 2>&1;
   do
     collect_entry Rss
-    collect_entry Pss
-    collect_entry Private_Dirty
-    collect_entry Private_Clean
-    collect_entry Shared_Dirty
-    collect_entry Shared_Clean
-    collect_entry Share
-    collect_entry Size
-    collect_entry Swap
 
     sleep $SLEEP
-
   done
 }
 
+run_test
 
-ITERATIONS=`seq 1 $REPEATS`
-START=$(date +%s.%N)
-
-for i in $ITERATIONS
-do
-  run_test
-done
-
-FINISH=$(date +%s.%N)
-
-echo
-
-if [ "$RAW_OUTPUT" != "" ];
-then
-   echo -e "$Rss_OUT";
-   echo -e "$Pss_OUT";
-   echo -e "$Private_Dirty_OUT";
-   echo -e "$Private_Clean_OUT";
-   echo -e "$Shared_Dirty_OUT";
-   echo -e "$Shared_Clean_OUT";
-   echo -e "$Share_OUT";
-   echo -e "$Size_OUT";
-   echo -e "$Swap_OUT";
-fi;
-
-if [ "$Size_OUT" == "" ]
-then
-  echo "==================="
-  echo "Test failed."
-  echo "==================="
-  exit 1
-fi;
-
-TIME=$(echo "scale=3;($FINISH - $START) / 1.0" | bc );
-AVG_TIME=$(echo "scale=3;$TIME / $REPEATS" | bc );
-
-echo "==================="
-printf "%24sAVERAGE%28sMAX\n" "" "";
 print_entry Rss
-print_entry Pss
-print_entry Private_Dirty
-print_entry Private_Clean
-print_entry Shared_Dirty
-print_entry Shared_Clean
-print_entry Share
-print_entry Size
-print_entry Swap
-echo -e "---"
-echo -e "Exec time / average:\t$TIME / $AVG_TIME secs"
-echo "==================="

From 677c5b4fba6a1161b71bbdaf95e3b3e4486e0c0e Mon Sep 17 00:00:00 2001
From: Ruben Ayrapetyan <r.ayrapetyan@samsung.com>
Date: Fri, 24 Apr 2015 13:23:21 +0300
Subject: [PATCH 05/14] Adding configuration option to execute GC after each
 opcode.

JerryScript-DCO-1.0-Signed-off-by: Ruben Ayrapetyan r.ayrapetyan@samsung.com
---
 jerry-core/config.h  | 5 +++++
 jerry-core/vm/vm.cpp | 4 ++++
 2 files changed, 9 insertions(+)

diff --git a/jerry-core/config.h b/jerry-core/config.h
index 6d39bd58f4..89c4b3b626 100644
--- a/jerry-core/config.h
+++ b/jerry-core/config.h
@@ -170,4 +170,9 @@
  */
 #define CONFIG_EXTENSION_MAX_ARGUMENTS_IN_FUNCTION 16
 
+/**
+ * Run GC after execution of each opcode
+ */
+// #define CONFIG_VM_RUN_GC_AFTER_EACH_OPCODE
+
 #endif /* !CONFIG_H */
diff --git a/jerry-core/vm/vm.cpp b/jerry-core/vm/vm.cpp
index 846c0d0c3a..4cf9b073db 100644
--- a/jerry-core/vm/vm.cpp
+++ b/jerry-core/vm/vm.cpp
@@ -439,6 +439,10 @@ run_int_loop (int_data_t *int_data)
 
       completion = __opfuncs[curr->op_idx] (*curr, int_data);
 
+#ifdef CONFIG_VM_RUN_GC_AFTER_EACH_OPCODE
+      ecma_gc_run ();
+#endif /* CONFIG_VM_RUN_GC_AFTER_EACH_OPCODE */
+
 #ifdef MEM_STATS
       interp_mem_stats_opcode_exit (int_data,
                                     opcode_pos,

From 98334e82e8b5e21f88eb5333fa5db50042ca92f1 Mon Sep 17 00:00:00 2001
From: Ruben Ayrapetyan <r.ayrapetyan@samsung.com>
Date: Fri, 24 Apr 2015 13:32:27 +0300
Subject: [PATCH 06/14] Adding configuration option for disabling ECMA lookup
 cache.

JerryScript-DCO-1.0-Signed-off-by: Ruben Ayrapetyan r.ayrapetyan@samsung.com
---
 jerry-core/config.h                  |  5 +++++
 jerry-core/ecma/base/ecma-lcache.cpp | 22 ++++++++++++++++++++++
 2 files changed, 27 insertions(+)

diff --git a/jerry-core/config.h b/jerry-core/config.h
index 89c4b3b626..c2d0bfac86 100644
--- a/jerry-core/config.h
+++ b/jerry-core/config.h
@@ -127,6 +127,11 @@
  */
 #define CONFIG_ECMA_STACK_FRAME_INLINED_VALUES_NUMBER (16)
 
+/**
+ * Disable ECMA lookup cache
+ */
+// #define CONFIG_ECMA_LCACHE_DISABLE
+
 /**
  * Link Global Environment to an empty declarative lexical environment
  * instead of lexical environment bound to Global Object.
diff --git a/jerry-core/ecma/base/ecma-lcache.cpp b/jerry-core/ecma/base/ecma-lcache.cpp
index 7ef34fbc80..7b63da691a 100644
--- a/jerry-core/ecma/base/ecma-lcache.cpp
+++ b/jerry-core/ecma/base/ecma-lcache.cpp
@@ -26,6 +26,7 @@
  * @{
  */
 
+#ifndef CONFIG_ECMA_LCACHE_DISABLE
 /**
  * Entry of LCache hash table
  */
@@ -65,6 +66,7 @@ JERRY_STATIC_ASSERT (sizeof (ecma_lcache_hash_entry_t) == sizeof (uint64_t));
  * LCache's hash table
  */
 static ecma_lcache_hash_entry_t ecma_lcache_hash_table[ ECMA_LCACHE_HASH_ROWS_COUNT ][ ECMA_LCACHE_HASH_ROW_LENGTH ];
+#endif /* !CONFIG_ECMA_LCACHE_DISABLE */
 
 /**
  * Initialize LCache
@@ -72,9 +74,12 @@ static ecma_lcache_hash_entry_t ecma_lcache_hash_table[ ECMA_LCACHE_HASH_ROWS_CO
 void
 ecma_lcache_init (void)
 {
+#ifndef CONFIG_ECMA_LCACHE_DISABLE
   memset (ecma_lcache_hash_table, 0, sizeof (ecma_lcache_hash_table));
+#endif /* !CONFIG_ECMA_LCACHE_DISABLE */
 } /* ecma_lcache_init */
 
+#ifndef CONFIG_ECMA_LCACHE_DISABLE
 /**
  * Invalidate specified LCache entry
  */
@@ -98,6 +103,7 @@ ecma_lcache_invalidate_entry (ecma_lcache_hash_entry_t *entry_p) /**< entry to i
                                false);
   }
 } /* ecma_lcache_invalidate_entry */
+#endif /* !CONFIG_ECMA_LCACHE_DISABLE */
 
 /**
  * Invalidate all entries in LCache
@@ -105,6 +111,7 @@ ecma_lcache_invalidate_entry (ecma_lcache_hash_entry_t *entry_p) /**< entry to i
 void
 ecma_lcache_invalidate_all (void)
 {
+#ifndef CONFIG_ECMA_LCACHE_DISABLE
   for (uint32_t row_index = 0; row_index < ECMA_LCACHE_HASH_ROWS_COUNT; row_index++)
   {
     for (uint32_t entry_index = 0; entry_index < ECMA_LCACHE_HASH_ROW_LENGTH; entry_index++)
@@ -115,8 +122,10 @@ ecma_lcache_invalidate_all (void)
       }
     }
   }
+#endif /* !CONFIG_ECMA_LCACHE_DISABLE */
 } /* ecma_lcache_invalidate_all */
 
+#ifndef CONFIG_ECMA_LCACHE_DISABLE
 /**
  * Invalidate entries of LCache's row that correspond to given (object, property) pair
  */
@@ -137,6 +146,7 @@ ecma_lcache_invalidate_row_for_object_property_pair (uint32_t row_index, /**< in
     }
   }
 } /* ecma_lcache_invalidate_row_for_object_property_pair */
+#endif /* !CONFIG_ECMA_LCACHE_DISABLE */
 
 /**
  * Insert an entry into LCache
@@ -151,6 +161,7 @@ ecma_lcache_insert (ecma_object_t *object_p, /**< object */
   JERRY_ASSERT (object_p != NULL);
   JERRY_ASSERT (prop_name_p != NULL);
 
+#ifndef CONFIG_ECMA_LCACHE_DISABLE
   prop_name_p = ecma_copy_or_ref_ecma_string (prop_name_p);
 
   ecma_string_hash_t hash_key = ecma_string_hash (prop_name_p);
@@ -210,6 +221,9 @@ ecma_lcache_insert (ecma_object_t *object_p, /**< object */
   ECMA_SET_NON_NULL_POINTER (ecma_lcache_hash_table[ hash_key ][ entry_index ].object_cp, object_p);
   ECMA_SET_NON_NULL_POINTER (ecma_lcache_hash_table[ hash_key ][ entry_index ].prop_name_cp, prop_name_p);
   ECMA_SET_POINTER (ecma_lcache_hash_table[ hash_key ][ entry_index ].prop_cp, prop_p);
+#else /* CONFIG_ECMA_LCACHE_DISABLE */
+  (void) prop_p;
+#endif /* CONFIG_ECMA_LCACHE_DISABLE */
 } /* ecma_lcache_insert */
 
 /**
@@ -228,6 +242,7 @@ ecma_lcache_lookup (ecma_object_t *object_p, /**< object */
                                                  *        if return value is false,
                                                  *         then the output parameter is not set */
 {
+#ifndef CONFIG_ECMA_LCACHE_DISABLE
   ecma_string_hash_t hash_key = ecma_string_hash (prop_name_p);
 
   unsigned int object_cp;
@@ -255,6 +270,11 @@ ecma_lcache_lookup (ecma_object_t *object_p, /**< object */
       }
     }
   }
+#else /* CONFIG_ECMA_LCACHE_DISABLE */
+  (void) object_p;
+  (void) prop_name_p;
+  (void) prop_p_p;
+#endif /* CONFIG_ECMA_LCACHE_DISABLE */
 
   return false;
 } /* ecma_lcache_lookup */
@@ -276,6 +296,7 @@ ecma_lcache_invalidate (ecma_object_t *object_p, /**< object */
   JERRY_ASSERT (object_p != NULL);
   JERRY_ASSERT (prop_p != NULL || prop_name_arg_p != NULL);
 
+#ifndef CONFIG_ECMA_LCACHE_DISABLE
   ecma_string_t *prop_name_p = NULL;
 
   if (prop_p != NULL)
@@ -318,6 +339,7 @@ ecma_lcache_invalidate (ecma_object_t *object_p, /**< object */
    * Given (object, property name) pair should be in the row corresponding to computed hash.
    */
   ecma_lcache_invalidate_row_for_object_property_pair (hash_key, object_cp, prop_cp);
+#endif /* !CONFIG_ECMA_LCACHE_DISABLE */
 } /* ecma_lcache_invalidate */
 
 /**

From 601dc2ed80fbbbd326780f38ba64ca7ac5d8318d Mon Sep 17 00:00:00 2001
From: Ruben Ayrapetyan <r.ayrapetyan@samsung.com>
Date: Fri, 24 Apr 2015 13:49:32 +0300
Subject: [PATCH 07/14] Introducing minimal footprint build modifier (mfp).

The modifier disables lookup cache and adds GC invocation after each opcode execution.

JerryScript-DCO-1.0-Signed-off-by: Ruben Ayrapetyan r.ayrapetyan@samsung.com
---
 CMakeLists.txt            | 7 +++++++
 Makefile                  | 2 +-
 jerry-core/CMakeLists.txt | 5 +++++
 3 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 502515f8af..c7161317de 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -119,6 +119,7 @@ project (Jerry CXX C ASM)
      COMPACT_PROFILE
      COMPACT_PROFILE_MINIMAL
      FULL_PROFILE
+     MINIMAL_FOOTPRINT
      MEMORY_STATISTICS)
 
  # Profiles
@@ -131,6 +132,9 @@ project (Jerry CXX C ASM)
   # Minimal compact profile
    set(MODIFIER_SUFFIX_COMPACT_PROFILE_MINIMAL -cp_minimal)
 
+  # Minimal footprint
+   set(MODIFIER_SUFFIX_MINIMAL_FOOTPRINT -mfp)
+
  # Memory statistics
   set(MODIFIER_SUFFIX_MEMORY_STATISTICS -mem_stats)
 
@@ -140,7 +144,10 @@ project (Jerry CXX C ASM)
      "FULL_PROFILE"
      "COMPACT_PROFILE"
      "COMPACT_PROFILE_MINIMAL"
+     "FULL_PROFILE MINIMAL_FOOTPRINT"
+     "FULL_PROFILE MINIMAL_FOOTPRINT MEMORY_STATISTICS"
      "FULL_PROFILE MEMORY_STATISTICS"
+     "COMPACT_PROFILE_MINIMAL MINIMAL_FOOTPRINT"
      "COMPACT_PROFILE_MINIMAL MEMORY_STATISTICS")
 
  # MCU
diff --git a/Makefile b/Makefile
index 0cc3f45cf0..eec8d7fd86 100644
--- a/Makefile
+++ b/Makefile
@@ -73,7 +73,7 @@ export TARGET_RELEASE_MODES = release
 export TARGET_PC_SYSTEMS = linux
 export TARGET_NUTTX_SYSTEMS = nuttx
 
-export TARGET_PC_MODS = cp cp_minimal mem_stats
+export TARGET_PC_MODS = cp cp_minimal mem_stats mfp cp_minimal-mfp mfp-mem_stats
 export TARGET_NUTTX_MODS = $(TARGET_PC_MODS)
 
 export TARGET_MCU_MODS = cp cp_minimal
diff --git a/jerry-core/CMakeLists.txt b/jerry-core/CMakeLists.txt
index 27a0ab2b12..9caead6d25 100644
--- a/jerry-core/CMakeLists.txt
+++ b/jerry-core/CMakeLists.txt
@@ -66,6 +66,11 @@ project (JerryCore CXX C ASM)
        CONFIG_ECMA_COMPACT_PROFILE_DISABLE_JSON_BUILTIN
        CONFIG_ECMA_COMPACT_PROFILE_DISABLE_REGEXP_BUILTIN)
 
+  # Minimal footprint
+   set(DEFINES_MINIMAL_FOOTPRINT
+       CONFIG_ECMA_LCACHE_DISABLE
+       CONFIG_VM_RUN_GC_AFTER_EACH_OPCODE)
+
  # Memory statistics
   set(DEFINES_MEMORY_STATISTICS MEM_STATS)
 

From d91f102a2cef452631b3d28f010e35e268130404 Mon Sep 17 00:00:00 2001
From: Ruben Ayrapetyan <r.ayrapetyan@samsung.com>
Date: Fri, 24 Apr 2015 15:56:31 +0300
Subject: [PATCH 08/14] Renaming --mem-stats-at-exit option to --mem-stats;
 adding --mem-stats-separate option for dumping memory statistics and
 resetting memory usage peak values after parse.

JerryScript-DCO-1.0-Signed-off-by: Ruben Ayrapetyan r.ayrapetyan@samsung.com
---
 jerry-core/jerry.cpp             | 32 ++++++++++++++++++++++-----
 jerry-core/jerry.h               | 15 +++++++------
 jerry-core/mem/mem-allocator.cpp | 38 ++++++++++++++++++++++++++++++++
 jerry-core/mem/mem-allocator.h   |  5 +++++
 main-linux.cpp                   |  8 +++++--
 main-nuttx.cpp                   |  8 +++++--
 6 files changed, 89 insertions(+), 17 deletions(-)

diff --git a/jerry-core/jerry.cpp b/jerry-core/jerry.cpp
index 8ece823a8c..ccfee573a2 100644
--- a/jerry-core/jerry.cpp
+++ b/jerry-core/jerry.cpp
@@ -27,6 +27,8 @@
 #include "ecma-objects-general.h"
 #include "jerry.h"
 #include "jrt.h"
+#include "mem-heap.h"
+#include "mem-poolman.h"
 #include "parser.h"
 #include "serializer.h"
 #include "vm.h"
@@ -901,14 +903,24 @@ jerry_api_eval (const char *source_p, /**< source code */
 void
 jerry_init (jerry_flag_t flags) /**< combination of Jerry flags */
 {
-  jerry_flags = flags;
-
-#ifndef MEM_STATS
-  if (flags & (JERRY_FLAG_MEM_STATS_AT_EXIT | JERRY_FLAG_MEM_STATS_PER_OPCODE))
+  if (flags & (JERRY_FLAG_MEM_STATS))
   {
+#ifndef MEM_STATS
+    flags &= ~(JERRY_FLAG_MEM_STATS
+               | JERRY_FLAG_MEM_STATS_PER_OPCODE
+               | JERRY_FLAG_MEM_STATS_SEPARATE);
+
     printf ("Ignoring memory statistics option because of '!MEM_STATS' build configuration.\n");
-  }
 #endif /* !MEM_STATS */
+  }
+  else if (flags & (JERRY_FLAG_MEM_STATS_PER_OPCODE | JERRY_FLAG_MEM_STATS_SEPARATE))
+  {
+    flags &= ~(JERRY_FLAG_MEM_STATS_PER_OPCODE | JERRY_FLAG_MEM_STATS_SEPARATE);
+
+    printf ("Ignoring detailed memory statistics options because memory statistics dump mode is not enabled.\n");
+  }
+
+  jerry_flags = flags;
 
   mem_init ();
   serializer_init ();
@@ -921,7 +933,7 @@ jerry_init (jerry_flag_t flags) /**< combination of Jerry flags */
 void
 jerry_cleanup (void)
 {
-  bool is_show_mem_stats = ((jerry_flags & JERRY_FLAG_MEM_STATS_AT_EXIT) != 0);
+  bool is_show_mem_stats = ((jerry_flags & JERRY_FLAG_MEM_STATS) != 0);
 
   ecma_finalize ();
   serializer_free ();
@@ -966,6 +978,14 @@ jerry_parse (const char* source_p, /**< script source */
   serializer_print_opcodes ();
   parser_free ();
 
+#ifdef MEM_STATS
+  if (jerry_flags & JERRY_FLAG_MEM_STATS_SEPARATE)
+  {
+    mem_stats_print ();
+    mem_stats_reset_peak ();
+  }
+#endif /* MEM_STATS */
+
   bool is_show_mem_stats_per_opcode = ((jerry_flags & JERRY_FLAG_MEM_STATS_PER_OPCODE) != 0);
 
   init_int (opcodes, is_show_mem_stats_per_opcode);
diff --git a/jerry-core/jerry.h b/jerry-core/jerry.h
index 7df750a315..45c60e5e52 100644
--- a/jerry-core/jerry.h
+++ b/jerry-core/jerry.h
@@ -31,13 +31,14 @@
  */
 typedef uint32_t jerry_flag_t;
 
-#define JERRY_FLAG_EMPTY                  (0)      /**< empty flag set */
-#define JERRY_FLAG_SHOW_OPCODES           (1 << 0) /**< dump opcodes to stdout after parse */
-#define JERRY_FLAG_MEM_STATS_AT_EXIT      (1 << 1) /**< dump per-opcode memory statistics during execution
-                                                    *   (in the mode full GC is performed after each opcode handler) */
-#define JERRY_FLAG_MEM_STATS_PER_OPCODE   (1 << 2) /**< dump peak memory statistics before exit */
-#define JERRY_FLAG_PARSE_ONLY             (1 << 3) /**< parse only, prevents script execution (only for testing)
-                                                    *   FIXME: Remove. */
+#define JERRY_FLAG_EMPTY                  (0u)      /**< empty flag set */
+#define JERRY_FLAG_SHOW_OPCODES           (1u << 0) /**< dump opcodes to stdout after parse */
+#define JERRY_FLAG_MEM_STATS              (1u << 1) /**< dump memory statistics */
+#define JERRY_FLAG_MEM_STATS_PER_OPCODE   (1u << 2) /**< dump per-opcode memory statistics during execution
+                                                     *   (in the mode full GC is performed after each opcode handler) */
+#define JERRY_FLAG_MEM_STATS_SEPARATE     (1u << 3) /**< dump memory statistics and reset peak values after parse */
+#define JERRY_FLAG_PARSE_ONLY             (1u << 4) /**< parse only, prevents script execution (only for testing)
+                                                     *   FIXME: Remove. */
 
 /**
  * Error codes
diff --git a/jerry-core/mem/mem-allocator.cpp b/jerry-core/mem/mem-allocator.cpp
index b1f650dc19..0adb83a1b0 100644
--- a/jerry-core/mem/mem-allocator.cpp
+++ b/jerry-core/mem/mem-allocator.cpp
@@ -185,3 +185,41 @@ mem_is_heap_pointer (void *pointer) /**< pointer */
   return (uint8_pointer >= mem_heap_area && uint8_pointer <= (mem_heap_area + MEM_HEAP_AREA_SIZE));
 } /* mem_is_heap_pointer */
 #endif /* !JERRY_NDEBUG */
+
+#ifdef MEM_STATS
+/**
+ * Reset peak values in memory usage statistics
+ */
+void
+mem_stats_reset_peak (void)
+{
+  mem_heap_stats_reset_peak ();
+  mem_pools_stats_reset_peak ();
+} /* mem_stats_reset_peak */
+
+/**
+ * Print memory usage statistics
+ */
+void
+mem_stats_print (void)
+{
+  mem_heap_print (false, false, true);
+
+  mem_pools_stats_t stats;
+  mem_pools_get_stats (&stats);
+
+  printf ("Pools stats:\n");
+  printf (" Chunk size: %zu\n"
+          "  Pools: %zu\n"
+          "  Allocated chunks: %zu\n"
+          "  Free chunks: %zu\n"
+          "  Peak pools: %zu\n"
+          "  Peak allocated chunks: %zu\n\n",
+          MEM_POOL_CHUNK_SIZE,
+          stats.pools_count,
+          stats.allocated_chunks,
+          stats.free_chunks,
+          stats.peak_pools_count,
+          stats.peak_allocated_chunks);
+} /* mem_stats_print */
+#endif /* MEM_STATS */
diff --git a/jerry-core/mem/mem-allocator.h b/jerry-core/mem/mem-allocator.h
index cb872ca0ae..a7e45d4a78 100644
--- a/jerry-core/mem/mem-allocator.h
+++ b/jerry-core/mem/mem-allocator.h
@@ -93,6 +93,11 @@ extern void mem_unregister_a_try_give_memory_back_callback (mem_try_give_memory_
 extern bool mem_is_heap_pointer (void *pointer);
 #endif /* !JERRY_NDEBUG */
 
+#ifdef MEM_STATS
+extern void mem_stats_reset_peak (void);
+extern void mem_stats_print (void);
+#endif /* MEM_STATS */
+
 #endif /* !JERRY_MEM_ALLOCATOR_H */
 
 /**
diff --git a/main-linux.cpp b/main-linux.cpp
index de0a2f4780..26430470f5 100644
--- a/main-linux.cpp
+++ b/main-linux.cpp
@@ -139,14 +139,18 @@ main (int argc,
       printf ("Branch name:\t%s\n", jerry_branch_name);
       printf ("\n");
     }
-    else if (!strcmp ("--mem-stats-at-exit", argv[i]))
+    else if (!strcmp ("--mem-stats", argv[i]))
     {
-      flags |= JERRY_FLAG_MEM_STATS_AT_EXIT;
+      flags |= JERRY_FLAG_MEM_STATS;
     }
     else if (!strcmp ("--mem-stats-per-opcode", argv[i]))
     {
       flags |= JERRY_FLAG_MEM_STATS_PER_OPCODE;
     }
+    else if (!strcmp ("--mem-stats-separate", argv[i]))
+    {
+      flags |= JERRY_FLAG_MEM_STATS_SEPARATE;
+    }
     else if (!strcmp ("--parse-only", argv[i]))
     {
       flags |= JERRY_FLAG_PARSE_ONLY;
diff --git a/main-nuttx.cpp b/main-nuttx.cpp
index 9e2dc342aa..bfc0661b1f 100644
--- a/main-nuttx.cpp
+++ b/main-nuttx.cpp
@@ -146,14 +146,18 @@ int jerry_main (int argc, char *argv[])
       printf ("Commit hash:\t%s\n", jerry_commit_hash);
       printf ("Branch name:\t%s\n", jerry_branch_name);
     }
-    else if (!strcmp ("--mem-stats-at-exit", argv[i]))
+    else if (!strcmp ("--mem-stats", argv[i]))
     {
-      flags |= JERRY_FLAG_MEM_STATS_AT_EXIT;
+      flags |= JERRY_FLAG_MEM_STATS;
     }
     else if (!strcmp ("--mem-stats-per-opcode", argv[i]))
     {
       flags |= JERRY_FLAG_MEM_STATS_PER_OPCODE;
     }
+    else if (!strcmp ("--mem-stats-separate", argv[i]))
+    {
+      flags |= JERRY_FLAG_MEM_STATS_SEPARATE;
+    }
     else if (!strcmp ("--parse-only", argv[i]))
     {
       flags |= JERRY_FLAG_PARSE_ONLY;

From 5a3cb1a9b25b05b6f0322df64a34c76bdd4c892b Mon Sep 17 00:00:00 2001
From: Ruben Ayrapetyan <r.ayrapetyan@samsung.com>
Date: Fri, 24 Apr 2015 16:35:30 +0300
Subject: [PATCH 09/14] Memory consumption measurement script.

JerryScript-DCO-1.0-Signed-off-by: Ruben Ayrapetyan r.ayrapetyan@samsung.com
---
 tools/mem_stats.sh | 72 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 72 insertions(+)
 create mode 100755 tools/mem_stats.sh

diff --git a/tools/mem_stats.sh b/tools/mem_stats.sh
new file mode 100755
index 0000000000..a460413da2
--- /dev/null
+++ b/tools/mem_stats.sh
@@ -0,0 +1,72 @@
+#!/bin/bash
+
+# Copyright 2015 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.
+
+# Choosing table or semicolon-separated output mode
+if [ "$1" == "-d" ]
+then
+  TABLE="no"
+  PRINT_TEST_NAME_AWK_SCRIPT='{printf "%s;", $1}'
+  PRINT_TOTAL_AWK_SCRIPT='{printf "%d;%d;%d;%d\n", $1, $2, $4, $5 * 1024}'
+
+  shift
+else
+  PRINT_TEST_NAME_AWK_SCRIPT='{printf "%30s", $1}'
+  PRINT_TOTAL_AWK_SCRIPT='{printf "%25d%35d%35d%20d\n", $1, $2, $4, $5 * 1024}'
+  TABLE="yes"
+fi
+
+# Engine
+JERRY="$1"
+shift
+
+# Benchmarks list
+BENCHMARKS=""
+
+while [ $# -ne 0 ]
+do
+  BENCHMARKS="$BENCHMARKS $1"
+  shift
+done
+
+# Checking that the specified build supports memory statistics options
+tmpfile=`mktemp`
+$JERRY --mem-stats $tmpfile | grep -- "Ignoring memory statistics option because of '!MEM_STATS' build configuration." 2>&1 > /dev/null
+code=$?
+rm $tmpfile
+
+if [ $code -eq 0 ]
+then
+  echo "Please, use engine built with mem_stats modifier."
+
+  exit 1
+fi
+
+# Running
+if [ "$TABLE" == "yes" ]
+then
+  awk 'BEGIN {printf "%30s%25s%35s%35s%20s\n", "Test name", "Heap (byte-code)", "Heap (byte-code + parser)", "Heap (byte-code + execution)", "Maximum RSS"}'
+  echo
+fi
+
+for bench in $BENCHMARKS
+do
+  test=`basename -s '.js' $bench`
+
+  echo "$test" | awk "$PRINT_TEST_NAME_AWK_SCRIPT"
+  ./tools/rss-measure.sh "$JERRY --mem-stats --mem-stats-separate" $bench | \
+    grep -e "Peak allocated=" -e "Allocated =" -e "Rss" | grep -o "[0-9]*" | awk '{s=s" "$1;} END {print s;}' | \
+    awk "$PRINT_TOTAL_AWK_SCRIPT"
+done

From d68abbd0c9f5005aa81f7fd0afa5bab7b92d5561 Mon Sep 17 00:00:00 2001
From: Ruben Ayrapetyan <r.ayrapetyan@samsung.com>
Date: Fri, 24 Apr 2015 20:41:08 +0300
Subject: [PATCH 10/14] Removing mem_heap_try_to_resize_block interface.

JerryScript-DCO-1.0-Signed-off-by: Ruben Ayrapetyan r.ayrapetyan@samsung.com
---
 jerry-core/mem/mem-heap.cpp | 136 ------------------------------------
 jerry-core/mem/mem-heap.h   |   1 -
 tests/unit/test_heap.cpp    |  22 ------
 3 files changed, 159 deletions(-)

diff --git a/jerry-core/mem/mem-heap.cpp b/jerry-core/mem/mem-heap.cpp
index edd32d87eb..5b72b8acef 100644
--- a/jerry-core/mem/mem-heap.cpp
+++ b/jerry-core/mem/mem-heap.cpp
@@ -652,142 +652,6 @@ mem_heap_alloc_block (size_t size_in_bytes,             /**< size of region to a
   }
 } /* mem_heap_alloc_block */
 
-/**
- * Try to resize memory region.
- *
- * @return true - if resize is successful,
- *         false - if there is not enough memory in front of the block.
- */
-bool
-mem_heap_try_resize_block (void *ptr, /**< pointer to beginning of data space of the block to resize */
-                           size_t size_in_bytes) /**< new block size */
-{
-  uint8_t *uint8_ptr = (uint8_t*) ptr;
-
-  /* checking that uint8_ptr points to the heap */
-  JERRY_ASSERT(uint8_ptr >= mem_heap.heap_start
-               && uint8_ptr <= mem_heap.heap_start + mem_heap.heap_size);
-
-  mem_check_heap ();
-
-  mem_block_header_t *block_p = (mem_block_header_t*) uint8_ptr - 1;
-
-  VALGRIND_DEFINED_STRUCT(block_p);
-
-  JERRY_ASSERT(block_p->magic_num == MEM_MAGIC_NUM_OF_ALLOCATED_BLOCK);
-
-  /* For heap statistics unit we show what is going on as though
-   * the block is freed and then new block (the same or resized)
-   * is allocated */
-  MEM_HEAP_STAT_FREE_BLOCK (block_p);
-
-  size_t current_block_may_expand_up_to = mem_get_block_data_space_size (block_p);
-
-  bool is_resized = false;
-
-  if (current_block_may_expand_up_to >= size_in_bytes)
-  {
-    is_resized = true;
-  }
-  else
-  {
-    size_t need_additional_bytes = size_in_bytes - current_block_may_expand_up_to;
-
-    mem_block_header_t *next_block_p = mem_get_next_block_by_direction (block_p, MEM_DIRECTION_NEXT);
-
-    if (next_block_p != NULL)
-    {
-      VALGRIND_DEFINED_STRUCT (next_block_p);
-
-      if (next_block_p->magic_num == MEM_MAGIC_NUM_OF_FREE_BLOCK)
-      {
-        size_t next_block_data_space_size = mem_get_block_data_space_size (next_block_p);
-
-        if (next_block_data_space_size >= need_additional_bytes)
-        {
-          /* next block is free and contains enough space */
-
-          is_resized = true;
-
-          size_t new_block_chunks_count = mem_get_block_chunks_count_from_data_size (size_in_bytes);
-          size_t current_block_chunks_count = mem_get_block_chunks_count (block_p);
-          size_t next_block_chunks_count = mem_get_block_chunks_count (next_block_p);
-
-          JERRY_ASSERT (new_block_chunks_count <= current_block_chunks_count + next_block_chunks_count);
-
-          size_t diff_in_chunks = (size_t) ((current_block_chunks_count +
-                                             next_block_chunks_count) - new_block_chunks_count);
-
-          mem_block_header_t *block_after_next_p = mem_get_next_block_by_direction (next_block_p,
-                                                                                    MEM_DIRECTION_NEXT);
-          mem_block_header_t *new_next_of_current_block_p;
-          mem_block_header_t *new_prev_of_block_after_next_p;
-
-          if (diff_in_chunks > 0)
-          {
-            mem_block_header_t *new_free_block_p = (mem_block_header_t*) ((uint8_t*) block_p +
-                                                                          new_block_chunks_count * MEM_HEAP_CHUNK_SIZE);
-
-            mem_init_block_header ((uint8_t*) new_free_block_p,
-                                   0,
-                                   MEM_BLOCK_FREE,
-                                   block_p,
-                                   block_after_next_p);
-
-            new_prev_of_block_after_next_p = new_free_block_p;
-            new_next_of_current_block_p = new_free_block_p;
-          }
-          else
-          {
-            new_prev_of_block_after_next_p = block_p;
-            new_next_of_current_block_p = block_after_next_p;
-          }
-
-          mem_set_block_next (block_p, new_next_of_current_block_p);
-          if (block_after_next_p != NULL)
-          {
-            VALGRIND_DEFINED_STRUCT (block_after_next_p);
-
-            mem_set_block_prev (block_after_next_p, new_prev_of_block_after_next_p);
-
-            VALGRIND_NOACCESS_STRUCT (block_after_next_p);
-          }
-          else
-          {
-            mem_heap.last_block_p = new_prev_of_block_after_next_p;
-          }
-        }
-      }
-      else
-      {
-        JERRY_ASSERT (next_block_p->magic_num == MEM_MAGIC_NUM_OF_ALLOCATED_BLOCK);
-      }
-
-      VALGRIND_NOACCESS_STRUCT (next_block_p);
-    }
-  }
-
-  if (is_resized)
-  {
-    JERRY_ASSERT ((mem_heap_offset_t) size_in_bytes == size_in_bytes);
-
-    if (size_in_bytes >= block_p->allocated_bytes)
-    {
-      VALGRIND_UNDEFINED_SPACE (uint8_ptr + block_p->allocated_bytes, size_in_bytes - block_p->allocated_bytes);
-    }
-
-    mem_set_block_allocated_bytes (block_p, size_in_bytes);
-  }
-
-  MEM_HEAP_STAT_ALLOC_BLOCK (block_p);
-
-  VALGRIND_NOACCESS_STRUCT(block_p);
-
-  mem_check_heap ();
-
-  return is_resized;
-} /* mem_heap_try_resize_block */
-
 /**
  * Free the memory block.
  */
diff --git a/jerry-core/mem/mem-heap.h b/jerry-core/mem/mem-heap.h
index 203b147a33..b43e9afb8c 100644
--- a/jerry-core/mem/mem-heap.h
+++ b/jerry-core/mem/mem-heap.h
@@ -42,7 +42,6 @@ typedef enum
 extern void mem_heap_init (uint8_t *heap_start, size_t heap_size);
 extern void mem_heap_finalize (void);
 extern void* mem_heap_alloc_block (size_t size_in_bytes, mem_heap_alloc_term_t alloc_term);
-extern bool mem_heap_try_resize_block (void *ptr, size_t size_in_bytes);
 extern void mem_heap_free_block (void *ptr);
 extern void* mem_heap_get_block_start (void *ptr);
 extern size_t __attr_pure___ mem_heap_recommend_allocation_size (size_t minimum_allocation_size);
diff --git a/tests/unit/test_heap.cpp b/tests/unit/test_heap.cpp
index e26d36eba8..b775e85870 100644
--- a/tests/unit/test_heap.cpp
+++ b/tests/unit/test_heap.cpp
@@ -118,28 +118,6 @@ main (int __attr_unused___ argc,
 
     // mem_heap_print (true);
 
-    for (uint32_t j = 0; j < test_sub_iters; j++)
-    {
-      if (ptrs[j] != NULL && (rand () % 2) == 0)
-      {
-        for (size_t k = 0; k < sizes[j]; k++)
-        {
-          JERRY_ASSERT(ptrs[j][k] == 0);
-        }
-
-        size_t new_size = (size_t) rand () % (test_threshold_block_size);
-
-        if (mem_heap_try_resize_block (ptrs[j], new_size))
-        {
-          sizes[j] = new_size;
-          memset (ptrs[j], 0, sizes[j]);
-        }
-
-        JERRY_ASSERT (sizes [j] == 0
-                      || mem_heap_get_block_start (ptrs[j] + (size_t) rand () % sizes [j]) == ptrs[j]);
-      }
-    }
-
     for (uint32_t j = 0; j < test_sub_iters; j++)
     {
       if (ptrs[j] != NULL)

From 6931ea80c37fff8c3f8105a5e4dfff42d070c93c Mon Sep 17 00:00:00 2001
From: Ruben Ayrapetyan <r.ayrapetyan@samsung.com>
Date: Fri, 24 Apr 2015 18:46:37 +0300
Subject: [PATCH 11/14] Introducing dynamically adjustable heap usage limit, so
 that GC tries to free heap space, when heap usage reached the limit.

JerryScript-DCO-1.0-Signed-off-by: Ruben Ayrapetyan r.ayrapetyan@samsung.com
---
 jerry-core/config.h         |  5 +++++
 jerry-core/mem/mem-heap.cpp | 45 +++++++++++++++++++++++++++++++++++++
 2 files changed, 50 insertions(+)

diff --git a/jerry-core/config.h b/jerry-core/config.h
index c2d0bfac86..1e8b033b10 100644
--- a/jerry-core/config.h
+++ b/jerry-core/config.h
@@ -55,6 +55,11 @@
 # define CONFIG_MEM_HEAP_AREA_SIZE (256 * 1024)
 #endif /* !CONFIG_MEM_HEAP_AREA_SIZE */
 
+/**
+ * Desired limit of heap usage
+ */
+#define CONFIG_MEM_HEAP_DESIRED_LIMIT (CONFIG_MEM_HEAP_AREA_SIZE / 32)
+
 /**
  * Log2 of maximum possible offset in the heap
  *
diff --git a/jerry-core/mem/mem-heap.cpp b/jerry-core/mem/mem-heap.cpp
index 5b72b8acef..3f0446b66b 100644
--- a/jerry-core/mem/mem-heap.cpp
+++ b/jerry-core/mem/mem-heap.cpp
@@ -139,6 +139,9 @@ typedef struct
   size_t heap_size; /**< heap space size */
   mem_block_header_t* first_block_p; /**< first block of the heap */
   mem_block_header_t* last_block_p;  /**< last block of the heap */
+  size_t allocated_bytes; /**< total size of allocated heap space */
+  size_t limit; /**< current limit of heap usage, that is upon being reached,
+                 *   causes call of "try give memory back" callbacks */
 } mem_heap_state_t;
 
 /**
@@ -382,6 +385,7 @@ mem_heap_init (uint8_t *heap_start, /**< first address of heap space */
 
   mem_heap.heap_start = heap_start;
   mem_heap.heap_size = heap_size;
+  mem_heap.limit = CONFIG_MEM_HEAP_DESIRED_LIMIT;
 
   VALGRIND_NOACCESS_SPACE(heap_start, heap_size);
 
@@ -510,6 +514,18 @@ void* mem_heap_alloc_block_internal (size_t size_in_bytes,             /**< size
     return NULL;
   }
 
+  mem_heap.allocated_bytes += size_in_bytes;
+
+  JERRY_ASSERT (mem_heap.allocated_bytes <= mem_heap.heap_size);
+
+  if (mem_heap.allocated_bytes >= mem_heap.limit)
+  {
+    mem_heap.limit = JERRY_MIN (mem_heap.heap_size,
+                                JERRY_MAX (mem_heap.limit + CONFIG_MEM_HEAP_DESIRED_LIMIT,
+                                           mem_heap.allocated_bytes));
+    JERRY_ASSERT (mem_heap.limit >= mem_heap.allocated_bytes);
+  }
+
   /* appropriate block found, allocating space */
   size_t new_block_size_in_chunks = mem_get_block_chunks_count_from_data_size (size_in_bytes);
   size_t found_block_size_in_chunks = mem_get_block_chunks_count (block_p);
@@ -625,6 +641,11 @@ mem_heap_alloc_block (size_t size_in_bytes,             /**< size of region to a
   }
   else
   {
+    if (mem_heap.allocated_bytes >= mem_heap.limit)
+    {
+      mem_run_try_to_give_memory_back_callbacks (MEM_TRY_GIVE_MEMORY_BACK_SEVERITY_LOW);
+    }
+
     void *data_space_p = mem_heap_alloc_block_internal (size_in_bytes, alloc_term);
 
     if (likely (data_space_p != NULL))
@@ -673,6 +694,23 @@ mem_heap_free_block (void *ptr) /**< pointer to beginning of data space of the b
   mem_block_header_t *prev_block_p = mem_get_next_block_by_direction (block_p, MEM_DIRECTION_PREV);
   mem_block_header_t *next_block_p = mem_get_next_block_by_direction (block_p, MEM_DIRECTION_NEXT);
 
+  JERRY_ASSERT (mem_heap.limit >= mem_heap.allocated_bytes);
+
+  size_t bytes = block_p->allocated_bytes;
+  JERRY_ASSERT (mem_heap.allocated_bytes >= bytes);
+  mem_heap.allocated_bytes -= bytes;
+
+  if (mem_heap.allocated_bytes * 3 <= mem_heap.limit)
+  {
+    mem_heap.limit /= 2;
+  }
+  else if (mem_heap.allocated_bytes + CONFIG_MEM_HEAP_DESIRED_LIMIT <= mem_heap.limit)
+  {
+    mem_heap.limit -= CONFIG_MEM_HEAP_DESIRED_LIMIT;
+  }
+
+  JERRY_ASSERT (mem_heap.limit >= mem_heap.allocated_bytes);
+
   MEM_HEAP_STAT_FREE_BLOCK (block_p);
 
   VALGRIND_NOACCESS_SPACE(uint8_ptr, block_p->allocated_bytes);
@@ -927,6 +965,7 @@ mem_check_heap (void)
 
   bool is_last_block_was_met = false;
   size_t chunk_sizes_sum = 0;
+  size_t allocated_sum = 0;
 
   for (mem_block_header_t *block_p = mem_heap.first_block_p, *next_block_p;
        block_p != NULL;
@@ -938,6 +977,11 @@ mem_check_heap (void)
                  || block_p->magic_num == MEM_MAGIC_NUM_OF_ALLOCATED_BLOCK);
     chunk_sizes_sum += mem_get_block_chunks_count (block_p);
 
+    if (block_p->magic_num == MEM_MAGIC_NUM_OF_ALLOCATED_BLOCK)
+    {
+      allocated_sum += block_p->allocated_bytes;
+    }
+
     next_block_p = mem_get_next_block_by_direction (block_p, MEM_DIRECTION_NEXT);
 
     if (block_p == mem_heap.last_block_p)
@@ -955,6 +999,7 @@ mem_check_heap (void)
   }
 
   JERRY_ASSERT(chunk_sizes_sum * MEM_HEAP_CHUNK_SIZE == mem_heap.heap_size);
+  JERRY_ASSERT(allocated_sum == mem_heap.allocated_bytes);
   JERRY_ASSERT(is_last_block_was_met);
 
   bool is_first_block_was_met = false;

From 7444422e787856738d2b293970ebede4bfa03b4d Mon Sep 17 00:00:00 2001
From: Ruben Ayrapetyan <r.ayrapetyan@samsung.com>
Date: Mon, 27 Apr 2015 16:23:55 +0300
Subject: [PATCH 12/14] Fixing heap usage limit condition of starting GC.

JerryScript-DCO-1.0-Signed-off-by: Ruben Ayrapetyan r.ayrapetyan@samsung.com
---
 jerry-core/mem/mem-heap.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/jerry-core/mem/mem-heap.cpp b/jerry-core/mem/mem-heap.cpp
index 3f0446b66b..6fb4c5e93e 100644
--- a/jerry-core/mem/mem-heap.cpp
+++ b/jerry-core/mem/mem-heap.cpp
@@ -641,7 +641,7 @@ mem_heap_alloc_block (size_t size_in_bytes,             /**< size of region to a
   }
   else
   {
-    if (mem_heap.allocated_bytes >= mem_heap.limit)
+    if (mem_heap.allocated_bytes + size_in_bytes >= mem_heap.limit)
     {
       mem_run_try_to_give_memory_back_callbacks (MEM_TRY_GIVE_MEMORY_BACK_SEVERITY_LOW);
     }

From fb2d68cb63ce5c17beddc5dcb477316373c2d867 Mon Sep 17 00:00:00 2001
From: Ruben Ayrapetyan <r.ayrapetyan@samsung.com>
Date: Mon, 27 Apr 2015 19:48:43 +0300
Subject: [PATCH 13/14] Fixing RSS measurement in tools/mem_stats.sh: using
 mem_stats build for heap usage statistics and non-mem_stats build for RSS
 measurement.

JerryScript-DCO-1.0-Signed-off-by: Ruben Ayrapetyan r.ayrapetyan@samsung.com
---
 tools/mem_stats.sh | 44 ++++++++++++++++++++++++++++----------------
 1 file changed, 28 insertions(+), 16 deletions(-)

diff --git a/tools/mem_stats.sh b/tools/mem_stats.sh
index a460413da2..eb64d393f4 100755
--- a/tools/mem_stats.sh
+++ b/tools/mem_stats.sh
@@ -28,9 +28,34 @@ else
   TABLE="yes"
 fi
 
+function fail_msg
+{
+  echo "$1"
+  exit 1
+}
+
 # Engine
+
+# Check if the specified build supports memory statistics options
+function is_mem_stats_build
+{
+  [ -x "$1" ] || fail_msg "Engine '$1' is not executable"
+
+  tmpfile=`mktemp`
+  "$1" --mem-stats $tmpfile | grep -- "Ignoring memory statistics option because of '!MEM_STATS' build configuration." 2>&1 > /dev/null
+  code=$?
+  rm $tmpfile
+
+  return $code
+}
+
 JERRY="$1"
 shift
+is_mem_stats_build "$JERRY" || fail_msg "First engine specified should be built without memory statistics support"
+
+JERRY_MEM_STATS="$1"
+shift
+is_mem_stats_build "$JERRY_MEM_STATS" && fail_msg "Second engine specified should be built with memory statistics support"
 
 # Benchmarks list
 BENCHMARKS=""
@@ -41,19 +66,6 @@ do
   shift
 done
 
-# Checking that the specified build supports memory statistics options
-tmpfile=`mktemp`
-$JERRY --mem-stats $tmpfile | grep -- "Ignoring memory statistics option because of '!MEM_STATS' build configuration." 2>&1 > /dev/null
-code=$?
-rm $tmpfile
-
-if [ $code -eq 0 ]
-then
-  echo "Please, use engine built with mem_stats modifier."
-
-  exit 1
-fi
-
 # Running
 if [ "$TABLE" == "yes" ]
 then
@@ -66,7 +78,7 @@ do
   test=`basename -s '.js' $bench`
 
   echo "$test" | awk "$PRINT_TEST_NAME_AWK_SCRIPT"
-  ./tools/rss-measure.sh "$JERRY --mem-stats --mem-stats-separate" $bench | \
-    grep -e "Peak allocated=" -e "Allocated =" -e "Rss" | grep -o "[0-9]*" | awk '{s=s" "$1;} END {print s;}' | \
-    awk "$PRINT_TOTAL_AWK_SCRIPT"
+  MEM_STATS=$("$JERRY_MEM_STATS" --mem-stats --mem-stats-separate $bench | grep -e "Peak allocated=" -e "Allocated =" | grep -o "[0-9]*")
+  RSS=$(./tools/rss-measure.sh "$JERRY" $bench | tail -n 1 | grep -e "Rss" | grep -o "[0-9]*")
+  echo $MEM_STATS $RSS | xargs | awk "$PRINT_TOTAL_AWK_SCRIPT"
 done

From c543ef134485187dc34ac3edaa731ccc4c5b80b8 Mon Sep 17 00:00:00 2001
From: Ruben Ayrapetyan <r.ayrapetyan@samsung.com>
Date: Mon, 27 Apr 2015 17:56:48 +0300
Subject: [PATCH 14/14] Printing memory consumption notes in tools/log.sh (make
 log).

JerryScript-DCO-1.0-Signed-off-by: Ruben Ayrapetyan r.ayrapetyan@samsung.com
---
 tools/git-scripts/log.sh | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/git-scripts/log.sh b/tools/git-scripts/log.sh
index d7c59555bd..6987cab724 100755
--- a/tools/git-scripts/log.sh
+++ b/tools/git-scripts/log.sh
@@ -17,6 +17,7 @@
 git log --graph --branches --decorate \
         --show-notes=perf --show-notes=mem --show-notes=test_build_env \
         --show-notes=arm-linux-perf \
+        --show-notes=arm-linux-memory-consumption \
         --show-notes=arm-linux-binary-size \
         --show-notes=stm32f4-binary-size