Add stack size unification test

Test checks stack sizes:
 - ISR stack: exactly 1KB (with exception for NORDIC - 2KB and RENESAS - Cortex A targets not supported for this test)
 - Main thread stack: exactly 4KB (with some exceptions - 3KB)
 - Thread stack: exactly 4KB

TESTS/mbed_hal/stack_size_unification/main.cpp

@@ -0,0 +1,74 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2018 ARM Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include "mbed.h"
+#include "greentea-client/test_env.h"
+#include "unity.h"
+#include "utest.h"
+
+#ifdef TARGET_RENESAS
+#error [NOT_SUPPORTED] Cortex-A target not supported for this test
+#endif
+
+using namespace utest::v1;
+
+extern osThreadAttr_t _main_thread_attr;
+extern uint32_t mbed_stack_isr_size;
+
+/* Exception for Nordic boards - BLE requires 2KB ISR stack. */
+#if defined(TARGET_NRF5x)
+#define EXPECTED_ISR_STACK_SIZE                  (2048)
+#else
+#define EXPECTED_ISR_STACK_SIZE                  (1024)
+#endif
+
+#if defined(TARGET_NUCLEO_F070RB) || defined(TARGET_NANO100) || defined(TARGET_STM32F072RB) || defined(TARGET_TMPM46B) || defined(TARGET_TMPM066)
+#define EXPECTED_MAIN_THREAD_STACK_SIZE          (3072)
+#else
+#define EXPECTED_MAIN_THREAD_STACK_SIZE          (4096)
+#endif
+
+#define EXPECTED_USER_THREAD_DEFAULT_STACK_SIZE  (4096)
+
+/* Test sizes of ISR stack, main thread stack, default user thread stack.
+ *
+ * On some platforms with lower RAM size (e.g. NUCLEO_F070RB - 16 KB RAM) it is impossible
+ * to create thread with default stack size to check its size, that is why we will
+ * check only macro which specifies default user thread stack.
+ *
+ */
+void stack_size_unification_test()
+{
+    TEST_ASSERT_EQUAL(EXPECTED_ISR_STACK_SIZE, mbed_stack_isr_size);
+    TEST_ASSERT_EQUAL(EXPECTED_MAIN_THREAD_STACK_SIZE, _main_thread_attr.stack_size);
+    TEST_ASSERT_EQUAL(EXPECTED_USER_THREAD_DEFAULT_STACK_SIZE, OS_STACK_SIZE);
+}
+
+utest::v1::status_t test_setup(const size_t number_of_cases)
+{
+    GREENTEA_SETUP(10, "default_auto");
+    return verbose_test_setup_handler(number_of_cases);
+}
+
+Case cases[] = {
+    Case("Stack size unification test", stack_size_unification_test)
+};
+
+Specification specification(test_setup, cases);
+
+int main()
+{
+    return !Harness::run(specification);
+}

TESTS/mbed_hal/stack_size_unification/stack_size_unification.h

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+/* mbed Microcontroller Library
+ * Copyright (c) 2017-2018 ARM Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/** \addtogroup hal_rtc_tests
+ *  @{
+ */
+
+#ifndef MBED_STACK_SIZE_UNIFICATION_H
+#define MBED_STACK_SIZE_UNIFICATION_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** Test sizes of ISR stack, main thread stack, default user thread stack.
+ *
+ *  Given is Mbed OS configuration.
+ *  When ISR stack, main thread stack, default user thread stack sizes are defined.
+ *  Then ISR stack size is equal to 1 KB,
+ *       main thread stack size is equal to 4 KB,
+ *       default user thread stack size is equal to 4 KB.
+ *
+ * NOTE:
+ * It is impossible to verify RTOS-less thread stack size since all tests are build with RTOS.
+ */
+void stack_size_unification_test(void);
+
+/**@}*/
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
+
+/** @}*/