tests: logging: restore userspace testing

Restore userspace testing that was removed with commit 'aa2b72d32a
(tests: logging: remove userspace testing, 2024-04-10)' and reported in
the issue #49213.

For the tests running with threads in user space (with ZTEST_USER),
the memory partitions are configured in the test-suite setup.

Signed-off-by: Christoph Winklhofer <cj.winklhofer@gmail.com>

tests/subsys/logging/log_core_additional/log_user.conf

@@ -5,9 +5,11 @@ CONFIG_TEST_LOGGING_DEFAULTS=n
 CONFIG_LOG=y
 CONFIG_LOG_OUTPUT=y
 CONFIG_LOG_RUNTIME_FILTERING=y
+CONFIG_LOG_ALWAYS_RUNTIME=y
 CONFIG_LOG_PROCESS_THREAD=n
 CONFIG_LOG_PROCESS_TRIGGER_THRESHOLD=1
 CONFIG_THREAD_MONITOR=y
-CONFIG_LOG_PRINTK=y
+CONFIG_LOG_PRINTK=n
 CONFIG_LOG_BLOCK_IN_THREAD=y
 CONFIG_MAIN_STACK_SIZE=4096
+CONFIG_STACK_SENTINEL=n

tests/subsys/logging/log_core_additional/src/log_test.c

@@ -20,6 +20,7 @@
 #include <zephyr/logging/log.h>
 #include <zephyr/logging/log_output.h>
 #include <zephyr/sys/iterable_sections.h>
+#include <zephyr/sys/libc-hooks.h>
 
 #define TEST_MESSAGE "test msg"
 
@@ -33,6 +34,18 @@ ZTEST_BMEM uint32_t source_id;
 ZTEST_BMEM uint8_t domain, level;
 ZTEST_DMEM uint32_t msg_data = 0x1234;
 
+/* Memory domain for tests with threads in user space (ZTEST_USER) */
+#if CONFIG_USERSPACE
+static struct k_mem_domain mem_domain;
+static struct k_mem_partition *mem_parts[] = {
+#if Z_LIBC_PARTITION_EXISTS
+	&z_libc_partition,
+#endif
+	&ztest_mem_partition,
+	&k_log_partition
+};
+#endif
+
 static uint8_t buf;
 static int char_out(uint8_t *data, size_t length, void *ctx)
 {
@@ -571,6 +584,12 @@ static void *test_log_core_additional_setup(void)
 #ifdef CONFIG_LOG_PROCESS_THREAD
 	k_thread_foreach(promote_log_thread, NULL);
 #endif
+
+#if CONFIG_USERSPACE
+	/* Set memory domain for threads in user space */
+	k_mem_domain_init(&mem_domain, ARRAY_SIZE(mem_parts), mem_parts);
+	k_mem_domain_add_thread(&mem_domain, k_current_get());
+#endif
 	return NULL;
 }
 

tests/subsys/logging/log_core_additional/testcase.yaml

@@ -14,3 +14,11 @@ tests:
     extra_args: CONF_FILE=log_thread.conf
     integration_platforms:
       - native_sim
+  logging.log_user:
+    tags: logging
+    filter: CONFIG_USERSPACE
+    extra_args:
+      - CONF_FILE=log_user.conf
+      - USERSPACE_TEST=1
+    integration_platforms:
+      - qemu_x86