[Tarantool-patches] [PATCH v1 luajit 4/5] test: rewrite misclib-getmetrics-capi test in C

[Sergey Kaplun via Tarantool-patches <tarantool-patches@dev.tarantool.org>]

This patch rewrites the aforementioned test with usage libtest recently
introduced. Since we still stand in need of a Lua helper script for
generation of traces, the original test file is reworked as a standalone
script, which returns the table with helper functions. Each helper
function is named the same as the test where it will be used. Now single
quotes are used according our Lua code style.

In C part all asserts from glibc are replaced with the corresponding
assert_{cond} from the libtest. Now tests return `TEST_EXIT_SUCCESS` at
the finish.  Also, stack check for the amount of return results from
helper function is slightly changed, since there is one more stack slot
in use (table with these functions). `snap_restores()` C function
duplicates 4 times for each subtest. Common helper
`check_snap_restores()` is used for each of them. Each error throwing is
replaced with `bail_out()` call.

NB: `lua_pop()` to clear the Lua stack after call should be done before
any possible assertion, which exit from test leaving the stack
uncleaned.

All skipconds use macros defined in <lj_arch.h>, so it is included in
the test. As far as this test initializes LuaJIT VM manually, there is
no need to check `jit.status()` result; check `LJ_HASJIT` is enough.
Now, only JIT-related tests are skipped, when compiled without JIT.
Nevertheless, all tests are skipped for *BSD arches.

Also, this patch sets the new CMake variable named `LUAJIT_LIBRARY`
equals to `LUAJIT_LIB` in `PARENT_SCOPE` to be used in tarantool-c-tests
linking.

Also, .c_test suffix is added to the <.gitignore>.

Part of tarantool/tarantool#7900
---
 .gitignore                                    |   1 +
 src/CMakeLists.txt                            |   2 +
 test/tarantool-c-tests/CMakeLists.txt         |  32 +-
 .../misclib-getmetrics-capi-script.lua}       |  82 ++---
 .../misclib-getmetrics-capi.test.c            | 341 ++++++++++++++++++
 test/tarantool-tests/CMakeLists.txt           |   1 -
 .../misclib-getmetrics-capi/CMakeLists.txt    |   1 -
 .../misclib-getmetrics-capi/testgetmetrics.c  | 270 --------------
 8 files changed, 409 insertions(+), 321 deletions(-)
 rename test/{tarantool-tests/misclib-getmetrics-capi.test.lua => tarantool-c-tests/misclib-getmetrics-capi-script.lua} (68%)
 create mode 100644 test/tarantool-c-tests/misclib-getmetrics-capi.test.c
 delete mode 100644 test/tarantool-tests/misclib-getmetrics-capi/CMakeLists.txt
 delete mode 100644 test/tarantool-tests/misclib-getmetrics-capi/testgetmetrics.c

diff --git a/.gitignore b/.gitignore
index b7908aee..dc5ea5fc 100644
--- a/.gitignore
+++ b/.gitignore
@@ -24,3 +24,4 @@ install_manifest.txt
 luajit-parse-memprof
 luajit-parse-sysprof
 luajit.pc
+*.c_test
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index dffc0a4d..58d83330 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -325,6 +325,8 @@ if(NOT BUILDMODE STREQUAL "dynamic")
   set(LUAJIT_BIN luajit_static)
   set(LUAJIT_LIB libluajit_static)
 endif()
+# Need for test linking, so PARENT_SCOPE option is used.
+set(LUAJIT_LIBRARY ${LUAJIT_LIB} PARENT_SCOPE)
 set(LIBLUAJIT_DEPS ${LIBLUAJIT_STATIC_DEPS} ${LIBLUAJIT_SHARED_DEPS})
 
 add_executable(${LUAJIT_BIN} EXCLUDE_FROM_ALL ${CLI_SOURCES})
diff --git a/test/tarantool-c-tests/CMakeLists.txt b/test/tarantool-c-tests/CMakeLists.txt
index 5ebea441..96beef1a 100644
--- a/test/tarantool-c-tests/CMakeLists.txt
+++ b/test/tarantool-c-tests/CMakeLists.txt
@@ -22,13 +22,37 @@ set_target_properties(libtest PROPERTIES
   LIBRARY_OUTPUT_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}"
 )
 
-# XXX: For now, just build libtest. The tests to be depended on
-# will be added at the next commit.
+# TARGET_C_FLAGS is required here to be sure that headers like
+# lj_arch.h in compiled test is consistent with the LuaJIT library
+# to link.
+AppendFlags(TESTS_C_FLAGS ${TARGET_C_FLAGS})
+
+set(CTEST_SRC_SUFFIX ".test.c")
+file(GLOB tests "${CMAKE_CURRENT_SOURCE_DIR}/*${CTEST_SRC_SUFFIX}")
+foreach(test_source ${tests})
+  string(REGEX REPLACE ".+/([^/]+)${CTEST_SRC_SUFFIX}" "\\1" exe ${test_source})
+  add_executable(${exe} EXCLUDE_FROM_ALL ${test_source})
+  target_include_directories(${exe} PRIVATE
+    ${CMAKE_CURRENT_SOURCE_DIR}
+    ${LUAJIT_SOURCE_DIR}
+  )
+  set_target_properties(${exe} PROPERTIES
+    # `__FILE__` macro may not represnt absolute path to the
+    # source file, depening on cmake version or
+    # -fmacro-prefix-map flag value.
+    # Use custom macro.
+    COMPILE_FLAGS "${TESTS_C_FLAGS} -D__ABS_FILENAME__='\"${test_source}\"'"
+    OUTPUT_NAME "${exe}${C_TEST_SUFFIX}"
+    RUNTIME_OUTPUT_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}"
+  )
+  target_link_libraries(${exe} libtest ${LUAJIT_LIBRARY})
+  LIST(APPEND TESTS_COMPILED ${exe})
+endforeach()
+
 add_custom_target(tarantool-c-tests
-  DEPENDS libluajit libtest
+  DEPENDS libluajit libtest ${TESTS_COMPILED}
 )
 
-# XXX: For now, run 0 tests. Just verify that libtest was build.
 add_custom_command(TARGET tarantool-c-tests
   COMMENT "Running Tarantool C tests"
   COMMAND
diff --git a/test/tarantool-tests/misclib-getmetrics-capi.test.lua b/test/tarantool-c-tests/misclib-getmetrics-capi-script.lua
similarity index 68%
rename from test/tarantool-tests/misclib-getmetrics-capi.test.lua
rename to test/tarantool-c-tests/misclib-getmetrics-capi-script.lua
index 654e5545..8fab485a 100644
--- a/test/tarantool-tests/misclib-getmetrics-capi.test.lua
+++ b/test/tarantool-c-tests/misclib-getmetrics-capi-script.lua
@@ -1,32 +1,25 @@
-local tap = require('tap')
-local test = tap.test("clib-misc-getmetrics"):skipcond({
-  ['Test requires JIT enabled'] = not jit.status(),
-  ['Disabled on *BSD due to #4819'] = jit.os == 'BSD',
-})
+local ffi = require('ffi')
 
-test:plan(11)
+-- Auxiliary script to provide Lua functions to be used in tests
+-- for `getmetrics()` C API inside the test
+-- <misclib-getmetrics-capi.test.c>.
+local M = {}
 
-local path = arg[0]:gsub('%.test%.lua', '')
-local suffix = package.cpath:match('?.(%a+);')
-package.cpath = ('%s/?.%s;'):format(path, suffix)..package.cpath
+-- XXX: Max nins is limited by max IRRef, that equals to
+-- REF_DROP - REF_BIAS. Unfortunately, these constants are not
+-- provided to Lua space, so we ought to make some math:
+-- * REF_DROP = 0xffff
+-- * REF_BIAS = 0x8000
+local MAXNINS =  0xffff - 0x8000
 
-local MAXNINS = require('utils').const.maxnins
 local jit_opt_default = {
     3, -- level
-    "hotloop=56",
-    "hotexit=10",
-    "minstitch=0",
+    'hotloop=56',
+    'hotexit=10',
+    'minstitch=0',
 }
 
-local testgetmetrics = require("testgetmetrics")
-
-test:ok(testgetmetrics.base())
-test:ok(testgetmetrics.gc_allocated_freed())
-test:ok(testgetmetrics.gc_steps())
-
-test:ok(testgetmetrics.objcount(function(iterations)
-    local ffi = require("ffi")
-
+M.objcount = function(iterations)
     jit.opt.start(0)
 
     local placeholder = {
@@ -51,35 +44,34 @@ test:ok(testgetmetrics.objcount(function(iterations)
 
     for _ = 1, iterations do
         -- Check counting of VLA/VLS/aligned cdata.
-        table.insert(placeholder.cdata, ffi.new("char[?]", 4))
+        table.insert(placeholder.cdata, ffi.new('char[?]', 4))
     end
 
     for _ = 1, iterations do
         -- Check counting of non-VLA/VLS/aligned cdata.
-        table.insert(placeholder.cdata, ffi.new("uint64_t", _))
+        table.insert(placeholder.cdata, ffi.new('uint64_t', _))
     end
 
     placeholder = nil -- luacheck: no unused
     -- Restore default jit settings.
     jit.opt.start(unpack(jit_opt_default))
-end))
+end
 
-test:ok(testgetmetrics.objcount_cdata_decrement(function()
+M.objcount_cdata_decrement = function()
     -- gc_cdatanum decrement test.
     -- See https://github.com/tarantool/tarantool/issues/5820.
-    local ffi = require("ffi")
     local function nop() end
-    ffi.gc(ffi.cast("void *", 0), nop)
+    ffi.gc(ffi.cast('void *', 0), nop)
     -- Does not collect the cdata, but resurrects the object and
     -- removes LJ_GC_CDATA_FIN flag.
     collectgarbage()
     -- Collects the cdata.
     collectgarbage()
-end))
+end
 
 -- Compiled loop with a direct exit to the interpreter.
-test:ok(testgetmetrics.snap_restores(function()
-    jit.opt.start(0, "hotloop=1")
+M.snap_restores_direct_exit = function()
+    jit.opt.start(0, 'hotloop=1')
 
     local sum = 0
     for i = 1, 20 do
@@ -91,11 +83,11 @@ test:ok(testgetmetrics.snap_restores(function()
 
     -- A single snapshot restoration happened on loop finish.
     return 1
-end))
+end
 
 -- Compiled loop with a side exit which does not get compiled.
-test:ok(testgetmetrics.snap_restores(function()
-    jit.opt.start(0, "hotloop=1", "hotexit=2", ("minstitch=%d"):format(MAXNINS))
+M.snap_restores_side_exit_not_compiled = function()
+    jit.opt.start(0, 'hotloop=1', 'hotexit=2', ('minstitch=%d'):format(MAXNINS))
 
     local function foo(i)
         -- math.fmod is not yet compiled!
@@ -112,13 +104,13 @@ test:ok(testgetmetrics.snap_restores(function()
 
     -- Side exits from the root trace could not get compiled.
     return 5
-end))
+end
 
 -- Compiled loop with a side exit which gets compiled.
-test:ok(testgetmetrics.snap_restores(function()
+M.snap_restores_side_exit_compiled = function()
     -- Optimization level is important here as `loop` optimization
     -- may unroll the loop body and insert +1 side exit.
-    jit.opt.start(0, "hotloop=1", "hotexit=5")
+    jit.opt.start(0, 'hotloop=1', 'hotexit=5')
 
     local function foo(i)
         return i <= 10 and i or tostring(i)
@@ -136,13 +128,13 @@ test:ok(testgetmetrics.snap_restores(function()
     -- and compiled
     -- 1 side exit on loop end
     return 6
-end))
+end
 
 -- Compiled scalar trace with a direct exit to the interpreter.
-test:ok(testgetmetrics.snap_restores(function()
+M.snap_restores_direct_exit_scalar = function()
     -- For calls it will be 2 * hotloop (see lj_dispatch.{c,h}
     -- and hotcall@vm_*.dasc).
-    jit.opt.start(3, "hotloop=2", "hotexit=3")
+    jit.opt.start(3, 'hotloop=2', 'hotexit=3')
 
     local function foo(i)
         return i <= 15 and i or tostring(i)
@@ -167,15 +159,15 @@ test:ok(testgetmetrics.snap_restores(function()
     jit.opt.start(unpack(jit_opt_default))
 
     return 2
-end))
+end
 
-test:ok(testgetmetrics.strhash())
-
-test:ok(testgetmetrics.tracenum_base(function()
+M.tracenum_base = function()
     local sum = 0
     for i = 1, 200 do
         sum = sum + i
     end
     -- Compiled only 1 loop as new trace.
     return 1
-end))
+end
+
+return M
diff --git a/test/tarantool-c-tests/misclib-getmetrics-capi.test.c b/test/tarantool-c-tests/misclib-getmetrics-capi.test.c
new file mode 100644
index 00000000..a1bafbe6
--- /dev/null
+++ b/test/tarantool-c-tests/misclib-getmetrics-capi.test.c
@@ -0,0 +1,341 @@
+#include "lua.h"
+#include "luajit.h"
+#include "lauxlib.h"
+#include "lmisclib.h"
+
+#include "test.h"
+#include "utils.h"
+
+/* Need for skipcond for BSD and JIT. */
+#include "lj_arch.h"
+
+static int base(void *test_state)
+{
+	lua_State *L = test_state;
+	struct luam_Metrics metrics;
+	luaM_metrics(L, &metrics);
+
+	/*
+	 * Just check structure format, not values that fields
+	 * contain.
+	 */
+	(void)metrics.strhash_hit;
+	(void)metrics.strhash_miss;
+
+	(void)metrics.gc_strnum;
+	(void)metrics.gc_tabnum;
+	(void)metrics.gc_udatanum;
+	(void)metrics.gc_cdatanum;
+
+	(void)metrics.gc_total;
+	(void)metrics.gc_freed;
+	(void)metrics.gc_allocated;
+
+	(void)metrics.gc_steps_pause;
+	(void)metrics.gc_steps_propagate;
+	(void)metrics.gc_steps_atomic;
+	(void)metrics.gc_steps_sweepstring;
+	(void)metrics.gc_steps_sweep;
+	(void)metrics.gc_steps_finalize;
+
+	(void)metrics.jit_snap_restore;
+	(void)metrics.jit_trace_abort;
+	(void)metrics.jit_mcode_size;
+	(void)metrics.jit_trace_num;
+
+	return TEST_EXIT_SUCCESS;
+}
+
+static int gc_allocated_freed(void *test_state)
+{
+	lua_State *L = test_state;
+	struct luam_Metrics oldm, newm;
+	/* Force up garbage collect all dead objects. */
+	lua_gc(L, LUA_GCCOLLECT, 0);
+
+	luaM_metrics(L, &oldm);
+	/* Simple garbage generation. */
+	if (luaL_dostring(L, "local i = 0 for j = 1, 10 do i = i + j end"))
+		bail_out("failed to translate Lua code snippet");
+	lua_gc(L, LUA_GCCOLLECT, 0);
+	luaM_metrics(L, &newm);
+	assert_true(newm.gc_allocated - oldm.gc_allocated > 0);
+	assert_true(newm.gc_freed - oldm.gc_freed > 0);
+
+	return TEST_EXIT_SUCCESS;
+}
+
+static int gc_steps(void *test_state)
+{
+	lua_State *L = test_state;
+	struct luam_Metrics oldm, newm;
+	/*
+	 * Some garbage has already happened before the next line,
+	 * i.e. during frontend processing Lua test chunk.
+	 * Let's put a full garbage collection cycle on top
+	 * of that, and confirm that non-null values are reported
+	 * (we are not yet interested in actual numbers):
+	 */
+	lua_gc(L, LUA_GCCOLLECT, 0);
+
+	luaM_metrics(L, &oldm);
+	assert_true(oldm.gc_steps_pause > 0);
+	assert_true(oldm.gc_steps_propagate > 0);
+	assert_true(oldm.gc_steps_atomic > 0);
+	assert_true(oldm.gc_steps_sweepstring > 0);
+	assert_true(oldm.gc_steps_sweep > 0);
+	/* Nothing to finalize, skipped. */
+	assert_true(oldm.gc_steps_finalize == 0);
+
+	/*
+	 * As long as we don't create new Lua objects
+	 * consequent call should return the same values:
+	 */
+	luaM_metrics(L, &newm);
+	assert_sizet_equal(newm.gc_steps_pause, oldm.gc_steps_pause);
+	assert_sizet_equal(newm.gc_steps_propagate, oldm.gc_steps_propagate);
+	assert_sizet_equal(newm.gc_steps_atomic, oldm.gc_steps_atomic);
+	assert_sizet_equal(newm.gc_steps_sweepstring,
+			   oldm.gc_steps_sweepstring);
+	assert_sizet_equal(newm.gc_steps_sweep, oldm.gc_steps_sweep);
+	/* Nothing to finalize, skipped. */
+	assert_true(newm.gc_steps_finalize == 0);
+	oldm = newm;
+
+	/*
+	 * Now the last phase: run full GC once and make sure that
+	 * everything is being reported as expected:
+	 */
+	lua_gc(L, LUA_GCCOLLECT, 0);
+	luaM_metrics(L, &newm);
+	assert_true(newm.gc_steps_pause - oldm.gc_steps_pause == 1);
+	assert_true(newm.gc_steps_propagate - oldm.gc_steps_propagate >= 1);
+	assert_true(newm.gc_steps_atomic - oldm.gc_steps_atomic == 1);
+	assert_true(newm.gc_steps_sweepstring - oldm.gc_steps_sweepstring >= 1);
+	assert_true(newm.gc_steps_sweep - oldm.gc_steps_sweep >= 1);
+	/* Nothing to finalize, skipped. */
+	assert_true(newm.gc_steps_finalize == 0);
+	oldm = newm;
+
+	/*
+	 * Now let's run three GC cycles to ensure that
+	 * increment was not a lucky coincidence.
+	 */
+	lua_gc(L, LUA_GCCOLLECT, 0);
+	lua_gc(L, LUA_GCCOLLECT, 0);
+	lua_gc(L, LUA_GCCOLLECT, 0);
+	luaM_metrics(L, &newm);
+	assert_true(newm.gc_steps_pause - oldm.gc_steps_pause == 3);
+	assert_true(newm.gc_steps_propagate - oldm.gc_steps_propagate >= 3);
+	assert_true(newm.gc_steps_atomic - oldm.gc_steps_atomic == 3);
+	assert_true(newm.gc_steps_sweepstring - oldm.gc_steps_sweepstring >= 3);
+	assert_true(newm.gc_steps_sweep - oldm.gc_steps_sweep >= 3);
+	/* Nothing to finalize, skipped. */
+	assert_true(newm.gc_steps_finalize == 0);
+
+	return TEST_EXIT_SUCCESS;
+}
+
+static int objcount(void *test_state)
+{
+	lua_State *L = test_state;
+	struct luam_Metrics oldm, newm;
+	if (!LJ_HASJIT)
+		skip("Test requires JIT enabled");
+
+	utils_get_aux_lfunc(L);
+
+	/* Force up garbage collect all dead objects. */
+	lua_gc(L, LUA_GCCOLLECT, 0);
+
+	luaM_metrics(L, &oldm);
+	/* Generate garbage. Argument is iterations amount. */
+	lua_pushnumber(L, 1000);
+	lua_call(L, 1, 0);
+	lua_gc(L, LUA_GCCOLLECT, 0);
+	luaM_metrics(L, &newm);
+	assert_sizet_equal(newm.gc_strnum, oldm.gc_strnum);
+	assert_sizet_equal(newm.gc_tabnum, oldm.gc_tabnum);
+	assert_sizet_equal(newm.gc_udatanum, oldm.gc_udatanum);
+	assert_sizet_equal(newm.gc_cdatanum, oldm.gc_cdatanum);
+
+	return TEST_EXIT_SUCCESS;
+}
+
+static int objcount_cdata_decrement(void *test_state)
+{
+	lua_State *L = test_state;
+	/*
+	 * cdata decrement test.
+	 * See https://github.com/tarantool/tarantool/issues/5820.
+	 */
+	struct luam_Metrics oldm, newm;
+	utils_get_aux_lfunc(L);
+
+	/* Force up garbage collect all dead objects. */
+	lua_gc(L, LUA_GCCOLLECT, 0);
+
+	luaM_metrics(L, &oldm);
+	/*
+	 * The function generates and collects cdata with
+	 * LJ_GC_CDATA_FIN flag.
+	 */
+	lua_call(L, 0, 0);
+	luaM_metrics(L, &newm);
+	assert_sizet_equal(newm.gc_cdatanum, oldm.gc_cdatanum);
+
+	return TEST_EXIT_SUCCESS;
+}
+
+/*
+ * Get function to call to generate the corresponding snapshot
+ * restores on top of the Lua stack. Function returns the amount
+ * of snapshot restorations expected.
+ * Clear stack after call.
+ */
+static void check_snap_restores(lua_State *L)
+{
+	struct luam_Metrics oldm, newm;
+	luaM_metrics(L, &oldm);
+	/* Generate snapshots. */
+	lua_call(L, 0, 1);
+	int n = lua_gettop(L);
+	/*
+	 * The first value is the table with functions,
+	 * the second is number of snapshot restores.
+	 */
+	if (n != 2 || !lua_isnumber(L, -1))
+		bail_out("incorrect return value: 1 number is required");
+	size_t snap_restores = lua_tonumber(L, -1);
+	luaM_metrics(L, &newm);
+	/*
+	 * Remove `snap_restores` from stack.
+	 * Must be done before potiential assert and exit from
+	 * the test.
+	 */
+	lua_pop(L, 1);
+	assert_true(newm.jit_snap_restore - oldm.jit_snap_restore
+		    == snap_restores);
+}
+
+static int snap_restores_direct_exit(void *test_state)
+{
+	lua_State *L = test_state;
+	if (!LJ_HASJIT)
+		skip("Test requires JIT enabled");
+	utils_get_aux_lfunc(L);
+	check_snap_restores(L);
+	return TEST_EXIT_SUCCESS;
+}
+
+static int snap_restores_direct_exit_scalar(void *test_state)
+{
+	lua_State *L = test_state;
+	if (!LJ_HASJIT)
+		skip("Test requires JIT enabled");
+	utils_get_aux_lfunc(L);
+	check_snap_restores(L);
+	return TEST_EXIT_SUCCESS;
+}
+
+static int snap_restores_side_exit_compiled(void *test_state)
+{
+	lua_State *L = test_state;
+	if (!LJ_HASJIT)
+		skip("Test requires JIT enabled");
+	utils_get_aux_lfunc(L);
+	check_snap_restores(L);
+	return TEST_EXIT_SUCCESS;
+}
+
+static int snap_restores_side_exit_not_compiled(void *test_state)
+{
+	lua_State *L = test_state;
+	if (!LJ_HASJIT)
+		skip("Test requires JIT enabled");
+	utils_get_aux_lfunc(L);
+	check_snap_restores(L);
+	return TEST_EXIT_SUCCESS;
+}
+
+static int strhash(void *test_state)
+{
+	lua_State *L = test_state;
+	struct luam_Metrics oldm, newm;
+	lua_pushstring(L, "strhash_hit");
+	luaM_metrics(L, &oldm);
+	lua_pushstring(L, "strhash_hit");
+	lua_pushstring(L, "new_str");
+	luaM_metrics(L, &newm);
+	/* Remove pushed strings. */
+	lua_pop(L, 3);
+	assert_true(newm.strhash_hit - oldm.strhash_hit == 1);
+	assert_true(newm.strhash_miss - oldm.strhash_miss == 1);
+	return TEST_EXIT_SUCCESS;
+}
+
+static int tracenum_base(void *test_state)
+{
+	lua_State *L = test_state;
+	if (!LJ_HASJIT)
+		skip("Test requires JIT enabled");
+	struct luam_Metrics metrics;
+	utils_get_aux_lfunc(L);
+
+	luaJIT_setmode(L, 0, LUAJIT_MODE_FLUSH);
+	/* Force up garbage collect all dead objects. */
+	lua_gc(L, LUA_GCCOLLECT, 0);
+
+	luaM_metrics(L, &metrics);
+	assert_true(metrics.jit_trace_num == 0);
+
+	/* Generate traces. */
+	lua_call(L, 0, 1);
+	int n = lua_gettop(L);
+	/*
+	 * The first value is the table with functions,
+	 * the second is the amount of traces.
+	 */
+	if (n != 2 || !lua_isnumber(L, -1))
+		bail_out("incorrect return value: 1 number is required");
+	size_t jit_trace_num = lua_tonumber(L, -1);
+	luaM_metrics(L, &metrics);
+	/* Remove `jit_trace_num` from Lua stack. */
+	lua_pop(L, 1);
+
+	assert_sizet_equal(metrics.jit_trace_num, jit_trace_num);
+
+	luaJIT_setmode(L, 0, LUAJIT_MODE_FLUSH);
+	/* Force up garbage collect all dead objects. */
+	lua_gc(L, LUA_GCCOLLECT, 0);
+	luaM_metrics(L, &metrics);
+	assert_true(metrics.jit_trace_num == 0);
+
+	return TEST_EXIT_SUCCESS;
+}
+
+int main(void)
+{
+	if (LUAJIT_OS == LUAJIT_OS_BSD)
+		skip_all("Disabled on *BSD due to #4819");
+
+	lua_State *L = utils_lua_init();
+
+	utils_load_aux_script(L);
+	const struct test_unit tgroup[] = {
+		test_unit_new(base),
+		test_unit_new(gc_allocated_freed),
+		test_unit_new(gc_steps),
+		test_unit_new(objcount),
+		test_unit_new(objcount_cdata_decrement),
+		test_unit_new(snap_restores_direct_exit),
+		test_unit_new(snap_restores_direct_exit_scalar),
+		test_unit_new(snap_restores_side_exit_compiled),
+		test_unit_new(snap_restores_side_exit_not_compiled),
+		test_unit_new(strhash),
+		test_unit_new(tracenum_base)
+	};
+	const int test_result =  test_run_group(tgroup, L);
+	utils_lua_close(L);
+	return test_result;
+}
diff --git a/test/tarantool-tests/CMakeLists.txt b/test/tarantool-tests/CMakeLists.txt
index 38d6ae49..b4ce39d3 100644
--- a/test/tarantool-tests/CMakeLists.txt
+++ b/test/tarantool-tests/CMakeLists.txt
@@ -66,7 +66,6 @@ add_subdirectory(lj-416-xor-before-jcc)
 add_subdirectory(lj-601-fix-gc-finderrfunc)
 add_subdirectory(lj-727-lightuserdata-itern)
 add_subdirectory(lj-flush-on-trace)
-add_subdirectory(misclib-getmetrics-capi)
 add_subdirectory(misclib-sysprof-capi)
 
 # The part of the memory profiler toolchain is located in tools
diff --git a/test/tarantool-tests/misclib-getmetrics-capi/CMakeLists.txt b/test/tarantool-tests/misclib-getmetrics-capi/CMakeLists.txt
deleted file mode 100644
index 60eb5bbb..00000000
--- a/test/tarantool-tests/misclib-getmetrics-capi/CMakeLists.txt
+++ /dev/null
@@ -1 +0,0 @@
-BuildTestCLib(testgetmetrics testgetmetrics.c)
diff --git a/test/tarantool-tests/misclib-getmetrics-capi/testgetmetrics.c b/test/tarantool-tests/misclib-getmetrics-capi/testgetmetrics.c
deleted file mode 100644
index 67776338..00000000
--- a/test/tarantool-tests/misclib-getmetrics-capi/testgetmetrics.c
+++ /dev/null
@@ -1,270 +0,0 @@
-#include <lua.h>
-#include <luajit.h>
-#include <lauxlib.h>
-
-#include <lmisclib.h>
-
-#undef NDEBUG
-#include <assert.h>
-
-static int base(lua_State *L)
-{
-	struct luam_Metrics metrics;
-	luaM_metrics(L, &metrics);
-
-	/* Just check structure format, not values that fields contain. */
-	(void)metrics.strhash_hit;
-	(void)metrics.strhash_miss;
-
-	(void)metrics.gc_strnum;
-	(void)metrics.gc_tabnum;
-	(void)metrics.gc_udatanum;
-	(void)metrics.gc_cdatanum;
-
-	(void)metrics.gc_total;
-	(void)metrics.gc_freed;
-	(void)metrics.gc_allocated;
-
-	(void)metrics.gc_steps_pause;
-	(void)metrics.gc_steps_propagate;
-	(void)metrics.gc_steps_atomic;
-	(void)metrics.gc_steps_sweepstring;
-	(void)metrics.gc_steps_sweep;
-	(void)metrics.gc_steps_finalize;
-
-	(void)metrics.jit_snap_restore;
-	(void)metrics.jit_trace_abort;
-	(void)metrics.jit_mcode_size;
-	(void)metrics.jit_trace_num;
-
-	lua_pushboolean(L, 1);
-	return 1;
-}
-
-static int gc_allocated_freed(lua_State *L)
-{
-	struct luam_Metrics oldm, newm;
-	/* Force up garbage collect all dead objects. */
-	lua_gc(L, LUA_GCCOLLECT, 0);
-
-	luaM_metrics(L, &oldm);
-	/* Simple garbage generation. */
-	if (luaL_dostring(L, "local i = 0 for j = 1, 10 do i = i + j end"))
-		luaL_error(L, "failed to translate Lua code snippet");
-	lua_gc(L, LUA_GCCOLLECT, 0);
-	luaM_metrics(L, &newm);
-	assert(newm.gc_allocated - oldm.gc_allocated > 0);
-	assert(newm.gc_freed - oldm.gc_freed > 0);
-
-	lua_pushboolean(L, 1);
-	return 1;
-}
-
-static int gc_steps(lua_State *L)
-{
-	struct luam_Metrics oldm, newm;
-	/*
-	 * Some garbage has already happened before the next line,
-	 * i.e. during frontend processing Lua test chunk.
-	 * Let's put a full garbage collection cycle on top
-	 * of that, and confirm that non-null values are reported
-	 * (we are not yet interested in actual numbers):
-	 */
-	lua_gc(L, LUA_GCCOLLECT, 0);
-
-	luaM_metrics(L, &oldm);
-	assert(oldm.gc_steps_pause > 0);
-	assert(oldm.gc_steps_propagate > 0);
-	assert(oldm.gc_steps_atomic > 0);
-	assert(oldm.gc_steps_sweepstring > 0);
-	assert(oldm.gc_steps_sweep > 0);
-	/* Nothing to finalize, skipped. */
-	assert(oldm.gc_steps_finalize == 0);
-
-	/*
-	 * As long as we don't create new Lua objects
-	 * consequent call should return the same values:
-	 */
-	luaM_metrics(L, &newm);
-	assert(newm.gc_steps_pause - oldm.gc_steps_pause == 0);
-	assert(newm.gc_steps_propagate - oldm.gc_steps_propagate == 0);
-	assert(newm.gc_steps_atomic - oldm.gc_steps_atomic == 0);
-	assert(newm.gc_steps_sweepstring - oldm.gc_steps_sweepstring == 0);
-	assert(newm.gc_steps_sweep - oldm.gc_steps_sweep == 0);
-	/* Nothing to finalize, skipped. */
-	assert(newm.gc_steps_finalize == 0);
-	oldm = newm;
-
-	/*
-	 * Now the last phase: run full GC once and make sure that
-	 * everything is being reported as expected:
-	 */
-	lua_gc(L, LUA_GCCOLLECT, 0);
-	luaM_metrics(L, &newm);
-	assert(newm.gc_steps_pause - oldm.gc_steps_pause == 1);
-	assert(newm.gc_steps_propagate - oldm.gc_steps_propagate >= 1);
-	assert(newm.gc_steps_atomic - oldm.gc_steps_atomic == 1);
-	assert(newm.gc_steps_sweepstring - oldm.gc_steps_sweepstring >= 1);
-	assert(newm.gc_steps_sweep - oldm.gc_steps_sweep >= 1);
-	/* Nothing to finalize, skipped. */
-	assert(newm.gc_steps_finalize == 0);
-	oldm = newm;
-
-	/*
-	 * Now let's run three GC cycles to ensure that
-	 * increment was not a lucky coincidence.
-	 */
-	lua_gc(L, LUA_GCCOLLECT, 0);
-	lua_gc(L, LUA_GCCOLLECT, 0);
-	lua_gc(L, LUA_GCCOLLECT, 0);
-	luaM_metrics(L, &newm);
-	assert(newm.gc_steps_pause - oldm.gc_steps_pause == 3);
-	assert(newm.gc_steps_propagate - oldm.gc_steps_propagate >= 3);
-	assert(newm.gc_steps_atomic - oldm.gc_steps_atomic == 3);
-	assert(newm.gc_steps_sweepstring - oldm.gc_steps_sweepstring >= 3);
-	assert(newm.gc_steps_sweep - oldm.gc_steps_sweep >= 3);
-	/* Nothing to finalize, skipped. */
-	assert(newm.gc_steps_finalize == 0);
-
-	lua_pushboolean(L, 1);
-	return 1;
-}
-
-static int objcount(lua_State *L)
-{
-	struct luam_Metrics oldm, newm;
-	int n = lua_gettop(L);
-	if (n != 1 || !lua_isfunction(L, 1))
-		luaL_error(L, "incorrect argument: 1 function is required");
-
-	/* Force up garbage collect all dead objects. */
-	lua_gc(L, LUA_GCCOLLECT, 0);
-
-	luaM_metrics(L, &oldm);
-	/* Generate garbage. Argument is iterations amount. */
-	lua_pushnumber(L, 1000);
-	lua_call(L, 1, 0);
-	lua_gc(L, LUA_GCCOLLECT, 0);
-	luaM_metrics(L, &newm);
-	assert(newm.gc_strnum - oldm.gc_strnum == 0);
-	assert(newm.gc_tabnum - oldm.gc_tabnum == 0);
-	assert(newm.gc_udatanum - oldm.gc_udatanum == 0);
-	assert(newm.gc_cdatanum - oldm.gc_cdatanum == 0);
-
-	lua_pushboolean(L, 1);
-	return 1;
-}
-
-static int objcount_cdata_decrement(lua_State *L)
-{
-	/*
-	 * cdata decrement test.
-	 * See https://github.com/tarantool/tarantool/issues/5820.
-	 */
-	struct luam_Metrics oldm, newm;
-	int n = lua_gettop(L);
-	if (n != 1 || !lua_isfunction(L, 1))
-		luaL_error(L, "incorrect argument: 1 function is required");
-
-	/* Force up garbage collect all dead objects. */
-	lua_gc(L, LUA_GCCOLLECT, 0);
-
-	luaM_metrics(L, &oldm);
-	/*
-	 * The function generates and collects cdata with
-	 * LJ_GC_CDATA_FIN flag.
-	 */
-	lua_call(L, 0, 0);
-	luaM_metrics(L, &newm);
-	assert(newm.gc_cdatanum - oldm.gc_cdatanum == 0);
-
-	lua_pushboolean(L, 1);
-	return 1;
-}
-
-static int snap_restores(lua_State *L)
-{
-	struct luam_Metrics oldm, newm;
-	int n = lua_gettop(L);
-	if (n != 1 || !lua_isfunction(L, 1))
-		luaL_error(L, "incorrect arguments: 1 function is required");
-
-	luaM_metrics(L, &oldm);
-	/* Generate snapshots. */
-	lua_call(L, 0, 1);
-	n = lua_gettop(L);
-	if (n != 1 || !lua_isnumber(L, 1))
-		luaL_error(L, "incorrect return value: 1 number is required");
-	size_t snap_restores = lua_tonumber(L, 1);
-	luaM_metrics(L, &newm);
-	assert(newm.jit_snap_restore - oldm.jit_snap_restore == snap_restores);
-
-	lua_pushboolean(L, 1);
-	return 1;
-}
-
-static int strhash(lua_State *L)
-{
-	struct luam_Metrics oldm, newm;
-	lua_pushstring(L, "strhash_hit");
-	luaM_metrics(L, &oldm);
-	lua_pushstring(L, "strhash_hit");
-	lua_pushstring(L, "new_str");
-	luaM_metrics(L, &newm);
-	assert(newm.strhash_hit - oldm.strhash_hit == 1);
-	assert(newm.strhash_miss - oldm.strhash_miss == 1);
-	lua_pop(L, 3);
-	lua_pushboolean(L, 1);
-	return 1;
-}
-
-static int tracenum_base(lua_State *L)
-{
-	struct luam_Metrics metrics;
-	int n = lua_gettop(L);
-	if (n != 1 || !lua_isfunction(L, 1))
-		luaL_error(L, "incorrect arguments: 1 function is required");
-
-	luaJIT_setmode(L, 0, LUAJIT_MODE_FLUSH);
-	/* Force up garbage collect all dead objects. */
-	lua_gc(L, LUA_GCCOLLECT, 0);
-
-	luaM_metrics(L, &metrics);
-	assert(metrics.jit_trace_num == 0);
-
-	/* Generate traces. */
-	lua_call(L, 0, 1);
-	n = lua_gettop(L);
-	if (n != 1 || !lua_isnumber(L, 1))
-		luaL_error(L, "incorrect return value: 1 number is required");
-	size_t jit_trace_num = lua_tonumber(L, 1);
-	luaM_metrics(L, &metrics);
-	assert(metrics.jit_trace_num == jit_trace_num);
-
-	luaJIT_setmode(L, 0, LUAJIT_MODE_FLUSH);
-	/* Force up garbage collect all dead objects. */
-	lua_gc(L, LUA_GCCOLLECT, 0);
-	luaM_metrics(L, &metrics);
-	assert(metrics.jit_trace_num == 0);
-
-	lua_pushboolean(L, 1);
-	return 1;
-}
-
-static const struct luaL_Reg testgetmetrics[] = {
-	{"base", base},
-	{"gc_allocated_freed", gc_allocated_freed},
-	{"gc_steps", gc_steps},
-	{"objcount", objcount},
-	{"objcount_cdata_decrement", objcount_cdata_decrement},
-	{"snap_restores", snap_restores},
-	{"strhash", strhash},
-	{"tracenum_base", tracenum_base},
-	{NULL, NULL}
-};
-
-LUA_API int luaopen_testgetmetrics(lua_State *L)
-{
-	luaL_register(L, "testgetmetrics", testgetmetrics);
-	return 1;
-}
-- 
2.34.1