arch posix: Implement arch_thread_name_set()

This will update the posix thread names to match
the zephyr thread names.

This will simplify debugging as the debugger will
recognize the thread names.

Signed-off-by: Rubin Gerritsen <rubin.gerritsen@nordicsemi.no>

arch/Kconfig

@@ -146,6 +146,7 @@ config ARCH_POSIX
 	select ARCH_HAS_CUSTOM_SWAP_TO_MAIN
 	select ARCH_HAS_CUSTOM_BUSY_WAIT
 	select ARCH_HAS_THREAD_ABORT
+	select ARCH_HAS_THREAD_NAME_HOOK
 	select NATIVE_BUILD
 	select HAS_COVERAGE_SUPPORT
 	select BARRIER_OPERATIONS_BUILTIN

arch/posix/core/posix_core_nsi.c

@@ -57,3 +57,8 @@ int posix_arch_get_unique_thread_id(int thread_idx)
 {
 	return nct_get_unique_thread_id(te_state, thread_idx);
 }
+
+int posix_arch_thread_name_set(int thread_idx, const char *str)
+{
+	return nct_thread_name_set(te_state, thread_idx, str);
+}

arch/posix/core/thread.c

@@ -13,6 +13,7 @@
  * architecture
  */
 
+#include <stdio.h>
 #include <zephyr/toolchain.h>
 #include <zephyr/kernel_structs.h>
 #include <ksched.h>
@@ -54,6 +55,40 @@ void arch_new_thread(struct k_thread *thread, k_thread_stack_t *stack,
 	thread_status->thread_idx = posix_new_thread((void *)thread_status);
 }
 
+int arch_thread_name_set(struct k_thread *thread, const char *str)
+{
+#define MAX_HOST_THREAD_NAME 16
+
+	int ret;
+	int thread_index;
+	posix_thread_status_t *thread_status;
+	char th_name[MAX_HOST_THREAD_NAME];
+
+	thread_status = thread->callee_saved.thread_status;
+	if (!thread_status) {
+		return -EAGAIN;
+	}
+
+	thread_index = thread_status->thread_idx;
+
+	if (!str) {
+		return -EAGAIN;
+	}
+
+	snprintf(th_name, MAX_HOST_THREAD_NAME,
+	#if (CONFIG_NATIVE_SIMULATOR_NUMBER_MCUS > 1)
+			STRINGIFY(CONFIG_NATIVE_SIMULATOR_MCU_N) ":"
+	#endif
+		"%s", str);
+
+	ret = posix_arch_thread_name_set(thread_index, th_name);
+	if (ret) {
+		return -EAGAIN;
+	}
+
+	return 0;
+}
+
 void posix_arch_thread_entry(void *pa_thread_status)
 {
 	posix_thread_status_t *ptr = pa_thread_status;

arch/posix/include/posix_core.h

@@ -47,6 +47,7 @@ void posix_main_thread_start(int next_allowed_thread_nbr);
 int posix_new_thread(void *payload);
 void posix_abort_thread(int thread_idx);
 int posix_arch_get_unique_thread_id(int thread_idx);
+int posix_arch_thread_name_set(int thread_idx, const char *str);
 
 #ifndef POSIX_ARCH_DEBUG_PRINTS
 #define POSIX_ARCH_DEBUG_PRINTS 0

scripts/native_simulator/common/src/include/nct_if.h

@@ -25,6 +25,7 @@ void nct_first_thread_start(void *this, int next_allowed_thread_nbr);
 int nct_new_thread(void *this, void *payload);
 void nct_abort_thread(void *this, int thread_idx);
 int nct_get_unique_thread_id(void *this, int thread_idx);
+int nct_thread_name_set(void *this, int thread_idx, const char *str);
 
 #ifdef __cplusplus
 }

scripts/native_simulator/common/src/nct.c

@@ -60,6 +60,8 @@
 
 #define NCT_DEBUG_PRINTS 0
 
+/* For pthread_setname_np() */
+#define _GNU_SOURCE
 #include <pthread.h>
 #include <stdbool.h>
 #include <stdlib.h>
@@ -647,6 +649,14 @@ int nct_get_unique_thread_id(void *this_arg, int thread_idx)
 	return tt_el->thead_cnt;
 }
 
+int nct_thread_name_set(void *this_arg, int thread_idx, const char *str)
+{
+	struct te_status_t *this = (struct te_status_t *)this_arg;
+	struct threads_table_el *tt_el = ttable_get_element(this, thread_idx);
+
+	return pthread_setname_np(tt_el->thread, str);
+}
+
 /*
  * Notes about coverage:
  *