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Support static snapshots. (#2239)

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Unlike normal snapshots, no part of a static snapshot is loaded into
the RAM when executed from ROM. Static snapshots rely heavily on
external magic strings.

JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com
This commit is contained in:
Zoltan Herczeg
2018-03-19 23:46:52 +01:00
committed by yichoi
parent dde09cc4b6
commit bb84466fcf
17 changed files with 850 additions and 166 deletions
Download Patch File Download Diff File Expand all files Collapse all files
tests/unit-core/test-snapshot.c
+62 -5
View File
@@ -23,6 +23,29 @@
*/
#define SNAPSHOT_BUFFER_SIZE (256)
/**
* Magic strings
*/
static const jerry_char_ptr_t magic_strings[] =
{
(const jerry_char_ptr_t) " ",
(const jerry_char_ptr_t) "a",
(const jerry_char_ptr_t) "b",
(const jerry_char_ptr_t) "c",
(const jerry_char_ptr_t) "from",
(const jerry_char_ptr_t) "func",
(const jerry_char_ptr_t) "string",
(const jerry_char_ptr_t) "snapshot"
};
/**
* Magic string lengths
*/
static const jerry_length_t magic_string_lengths[] =
{
1, 1, 1, 1, 4, 4, 6, 8
};
static void test_function_snapshot (void)
{
/* function to snapshot */
@@ -142,6 +165,10 @@ static void test_exec_snapshot (uint32_t *snapshot_p, size_t snapshot_size, bool
jerry_init (JERRY_INIT_EMPTY);
jerry_register_magic_strings (magic_strings,
sizeof (magic_string_lengths) / sizeof (jerry_length_t),
magic_string_lengths);
jerry_value_t res = jerry_exec_snapshot (snapshot_p,
snapshot_size,
copy_bytecode);
@@ -161,15 +188,15 @@ static void test_exec_snapshot (uint32_t *snapshot_p, size_t snapshot_size, bool
int
main (void)
{
static uint32_t global_mode_snapshot_buffer[SNAPSHOT_BUFFER_SIZE];
static uint32_t eval_mode_snapshot_buffer[SNAPSHOT_BUFFER_SIZE];
TEST_INIT ();
/* Dump / execute snapshot */
if (jerry_is_feature_enabled (JERRY_FEATURE_SNAPSHOT_SAVE)
&& jerry_is_feature_enabled (JERRY_FEATURE_SNAPSHOT_EXEC))
{
static uint32_t global_mode_snapshot_buffer[SNAPSHOT_BUFFER_SIZE];
static uint32_t eval_mode_snapshot_buffer[SNAPSHOT_BUFFER_SIZE];
const char *code_to_snapshot_p = "(function () { return 'string from snapshot'; }) ();";
jerry_init (JERRY_INIT_EMPTY);
@@ -184,11 +211,11 @@ main (void)
/* Check the snapshot data. Unused bytes should be filled with zeroes */
const uint8_t expected_data[] =
{
0x4A, 0x52, 0x52, 0x59, 0x09, 0x00, 0x00, 0x00,
0x4A, 0x52, 0x52, 0x59, 0x0A, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x48, 0x00, 0x00, 0x00,
0x01, 0x00, 0x00, 0x00, 0x18, 0x00, 0x00, 0x00,
0x03, 0x00, 0x01, 0x00, 0x01, 0x00, 0x01, 0x00,
0x00, 0x00, 0x00, 0x01, 0x03, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x01, 0x18, 0x00, 0x00, 0x00,
0x28, 0x00, 0xB7, 0x46, 0x00, 0x00, 0x00, 0x00,
0x03, 0x00, 0x01, 0x00, 0x41, 0x00, 0x00, 0x00,
0x00, 0x00, 0x01, 0x01, 0x07, 0x00, 0x00, 0x00,
@@ -229,6 +256,36 @@ main (void)
true);
}
/* Static snapshot */
if (jerry_is_feature_enabled (JERRY_FEATURE_SNAPSHOT_SAVE)
&& jerry_is_feature_enabled (JERRY_FEATURE_SNAPSHOT_EXEC))
{
const char *code_to_snapshot_p = ("function func(a, b, c) {"
" c = 'snapshot';"
" return arguments[0] + ' ' + b + ' ' + arguments[2];"
"};"
"func('string', 'from');");
jerry_init (JERRY_INIT_EMPTY);
jerry_register_magic_strings (magic_strings,
sizeof (magic_string_lengths) / sizeof (jerry_length_t),
magic_string_lengths);
size_t global_mode_snapshot_size = jerry_parse_and_save_static_snapshot ((jerry_char_t *) code_to_snapshot_p,
strlen (code_to_snapshot_p),
true,
false,
global_mode_snapshot_buffer,
SNAPSHOT_BUFFER_SIZE);
TEST_ASSERT (global_mode_snapshot_size != 0);
jerry_cleanup ();
test_exec_snapshot (global_mode_snapshot_buffer,
global_mode_snapshot_size,
false);
}
/* Merge snapshot */
if (jerry_is_feature_enabled (JERRY_FEATURE_SNAPSHOT_SAVE)
&& jerry_is_feature_enabled (JERRY_FEATURE_SNAPSHOT_EXEC))