This patch rewrites the aforementioned test with the 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 to 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, the stack check for the amount of return results from
the 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 a call should be done before
any possible assertion, which would exit from the 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 the LuaJIT VM manually, there
is no need to check `jit.status()` result; checking `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`
equal 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} | 83 ++---
 .../misclib-getmetrics-capi.test.c | 343 ++++++++++++++++++
 test/tarantool-tests/CMakeLists.txt | 1 -
 .../misclib-getmetrics-capi/CMakeLists.txt | 1 -
 .../misclib-getmetrics-capi/testgetmetrics.c | 270 --------------
 8 files changed, 412 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..fed4c38d 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 the test linking, so the 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 ${CLI_SOURCES})
diff --git a/test/tarantool-c-tests/CMakeLists.txt b/test/tarantool-c-tests/CMakeLists.txt
index c6b7cd30..c9d75d6c 100644
--- a/test/tarantool-c-tests/CMakeLists.txt
+++ b/test/tarantool-c-tests/CMakeLists.txt
@@ -22,13 +22,37 @@ set_target_properties(libtest PROPERTIES
   LIBRARY_OUTPUT_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}"
 )
 
-# XXX: For now, just build libtest. The tests to be depended on
-# will be added in the next commit.
+# TARGET_C_FLAGS is required here to be sure that headers like
+# lj_arch.h in compiled test are 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})

Please drop a comment explaining the line above.

 

<snipped>

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..2f0ee5cf 100644
--- a/test/tarantool-tests/misclib-getmetrics-capi.test.lua
+++ b/test/tarantool-c-tests/misclib-getmetrics-capi-script.lua

<snipped>

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..202cd395
--- /dev/null
+++ b/test/tarantool-c-tests/misclib-getmetrics-capi.test.c
@@ -0,0 +1,343 @@
+#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);

I think it is better to create a for loop here.

+ 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);

That part is duplicated. It is better to either write a corresponding macro, or

a function.

+ /* 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)
+ return 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;
+ 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;
+ 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;
+ 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;
+ utils_get_aux_lfunc(L);
+ check_snap_restores(L);
+ return TEST_EXIT_SUCCESS;
+}
+

Same here. Either a dedicated implementation func, or a macro is needed here.

+static int snap_restores_group(void *test_state)
+{
+ if (!LJ_HASJIT)
+ return skip("Test requires JIT enabled");
+ const struct test_unit tgroup[] = {
+ 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)
+ };
+ return test_run_group(tgroup, test_state);
+}
+
+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)
+ return 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)
+ return 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_group),
+ 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

--
Best regards,

Maxim Kokryashkin