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tests: dynamic_thread_stack: Check thread stack permission

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Check if a user thread is capable of free another thread stack.

Signed-off-by: Flavio Ceolin <flavio.ceolin@intel.com>
This commit is contained in:
Flavio Ceolin 2024-05-17 14:54:59 -07:00 • committed by Anas Nashif
commit 95dde52b1e
1 changed files with 98 additions and 1 deletions
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99
tests/kernel/threads/dynamic_thread_stack/src/main.c
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@ -9,7 +9,7 @@
#define TIMEOUT_MS 500 #define TIMEOUT_MS 500
#define POOL_SIZE 20480 #define POOL_SIZE 28672
#ifdef CONFIG_USERSPACE #ifdef CONFIG_USERSPACE
#define STACK_OBJ_SIZE K_THREAD_STACK_LEN(CONFIG_DYNAMIC_THREAD_STACK_SIZE) #define STACK_OBJ_SIZE K_THREAD_STACK_LEN(CONFIG_DYNAMIC_THREAD_STACK_SIZE)
@ -168,6 +168,103 @@ ZTEST(dynamic_thread_stack, test_dynamic_thread_stack_alloc)
} }
} }
K_SEM_DEFINE(perm_sem, 0, 1);
ZTEST_BMEM static volatile bool expect_fault;
ZTEST_BMEM static volatile unsigned int expected_reason;
static void set_fault(unsigned int reason)
{
expect_fault = true;
expected_reason = reason;
compiler_barrier();
}
void k_sys_fatal_error_handler(unsigned int reason, const z_arch_esf_t *pEsf)
{
if (expect_fault) {
if (expected_reason == reason) {
printk("System error was expected\n");
expect_fault = false;
} else {
printk("Wrong fault reason, expecting %d\n",
expected_reason);
TC_END_REPORT(TC_FAIL);
k_fatal_halt(reason);
}
} else {
printk("Unexpected fault during test\n");
TC_END_REPORT(TC_FAIL);
k_fatal_halt(reason);
}
}
static void perm_func(void *arg1, void *arg2, void *arg3)
{
k_sem_take((struct k_sem *)arg1, K_FOREVER);
}
static void perm_func_violator(void *arg1, void *arg2, void *arg3)
{
(void)k_thread_stack_free((k_thread_stack_t *)arg2);
zassert_unreachable("should not reach here");
}
/** @brief Exercise stack permissions */
ZTEST(dynamic_thread_stack, test_dynamic_thread_stack_permission)
{
static k_tid_t tid[2];
static struct k_thread th[2];
static k_thread_stack_t *stack[2];
if (!IS_ENABLED(CONFIG_DYNAMIC_THREAD_PREFER_ALLOC)) {
ztest_test_skip();
}
if (!IS_ENABLED(CONFIG_DYNAMIC_THREAD_ALLOC)) {
ztest_test_skip();
}
if (!IS_ENABLED(CONFIG_USERSPACE)) {
ztest_test_skip();
}
stack[0] = k_thread_stack_alloc(CONFIG_DYNAMIC_THREAD_STACK_SIZE, K_USER);
zassert_not_null(stack[0]);
stack[1] = k_thread_stack_alloc(CONFIG_DYNAMIC_THREAD_STACK_SIZE, K_USER);
zassert_not_null(stack[1]);
k_thread_access_grant(k_current_get(), &perm_sem);
/* First thread inherit permissions */
tid[0] = k_thread_create(&th[0], stack[0], CONFIG_DYNAMIC_THREAD_STACK_SIZE, perm_func,
&perm_sem, NULL, NULL, 0, K_USER | K_INHERIT_PERMS, K_NO_WAIT);
zassert_not_null(tid[0]);
/* Second thread will have access to specific kobjects only */
tid[1] = k_thread_create(&th[1], stack[1], CONFIG_DYNAMIC_THREAD_STACK_SIZE,
perm_func_violator, &perm_sem, stack[0], NULL, 0, K_USER,
K_FOREVER);
zassert_not_null(tid[1]);
k_thread_access_grant(tid[1], &perm_sem);
k_thread_access_grant(tid[1], &stack[1]);
set_fault(K_ERR_KERNEL_OOPS);
k_thread_start(tid[1]);
/* join all threads and check that flags have been set */
zassert_ok(k_thread_join(tid[1], K_MSEC(TIMEOUT_MS)));
k_sem_give(&perm_sem);
zassert_ok(k_thread_join(tid[0], K_MSEC(TIMEOUT_MS)));
/* clean up stacks allocated from the heap */
zassert_ok(k_thread_stack_free(stack[0]));
zassert_ok(k_thread_stack_free(stack[1]));
}
static void *dynamic_thread_stack_setup(void) static void *dynamic_thread_stack_setup(void)
{ {
k_thread_heap_assign(k_current_get(), &stack_heap); k_thread_heap_assign(k_current_get(), &stack_heap);