add tests/mpu_stack_guard for testing psuedomodule

tests/mpu_stack_guard/Makefile

@@ -0,0 +1,41 @@
+APPLICATION = mpu_stack_guard
+include ../Makefile.tests_common
+
+BOARD_WHITELIST += arduino-due      # cortex-m3
+BOARD_WHITELIST += arduino-zero     # cortex-m0plus
+BOARD_WHITELIST += cc2538dk         # cortex-m3
+BOARD_WHITELIST += cc2650stk        # cortex-m3
+BOARD_WHITELIST += ek-lm4f120xl     # cortex-m4f
+BOARD_WHITELIST += f4vi1            # cortex-m4f
+BOARD_WHITELIST += fox              # cortex-m3
+BOARD_WHITELIST += frdm-k64f        # cortex-m4
+BOARD_WHITELIST += iotlab-common    # cortex-m3
+BOARD_WHITELIST += limifrog-v1      # cortex-m3
+BOARD_WHITELIST += mbed_lpc1768     # cortex-m3
+BOARD_WHITELIST += msbiot           # cortex-m4f
+BOARD_WHITELIST += mulle            # cortex-m4
+BOARD_WHITELIST += nrf52dk          # cortex-m4f
+BOARD_WHITELIST += nucleo-f103      # cortex-m3
+BOARD_WHITELIST += nucleo-f207      # cortex-m3
+BOARD_WHITELIST += nucleo-f303      # cortex-m4f
+BOARD_WHITELIST += nucleo-f334      # cortex-m4f
+BOARD_WHITELIST += nucleo-f401      # cortex-m4f
+BOARD_WHITELIST += nucleo-f446      # cortex-m4f
+BOARD_WHITELIST += nucleo-l1        # cortex-m3
+BOARD_WHITELIST += openmote-cc2538  # cortex-m3
+BOARD_WHITELIST += pba-d-01-kw2x    # cortex-m4
+BOARD_WHITELIST += remote           # cortex-m3
+BOARD_WHITELIST += saml21-xpro      # cortex-m0plus
+BOARD_WHITELIST += samr21-xpro      # cortex-m0plus
+BOARD_WHITELIST += slwstk6220a      # cortex-m4f
+BOARD_WHITELIST += sodaq-autonomo   # cortex-m0plus
+BOARD_WHITELIST += spark-core       # cortex-m3
+BOARD_WHITELIST += stm32f3discovery # cortex-m4f
+BOARD_WHITELIST += stm32f4discovery # cortex-m4f
+BOARD_WHITELIST += udoo             # cortex-m3
+
+CFLAGS += -DDEVELHELP
+
+USEMODULE += mpu_stack_guard
+
+include $(RIOTBASE)/Makefile.include

tests/mpu_stack_guard/main.c

@@ -0,0 +1,78 @@
+/*
+ * Copyright (C) 2016 Loci Controls Inc.
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License v2.1. See the file LICENSE in the top level
+ * directory for more details.
+ */
+
+/**
+ * @ingroup tests
+ * @{
+ *
+ * @file
+ * @brief Test application for the mpu_stack_guard pseudo-module
+ *
+ * @author Ian Martin <ian@locicontrols.com>
+ *
+ * @}
+ */
+
+#include <stdio.h>
+
+#include "cpu.h"
+#include "thread.h"
+
+#define CANARY_VALUE 0xdeadbeef
+
+static struct {
+    unsigned int canary;
+    char stack[THREAD_STACKSIZE_MAIN];
+} buf;
+
+static int recurse(int counter)
+{
+    printf("counter =%4d, SP = 0x%08x, canary = 0x%08x\n", counter, (unsigned int)__get_PSP(), buf.canary);
+
+    if (buf.canary != CANARY_VALUE) {
+        printf("canary = 0x%08x\nTest failed.\n", buf.canary);
+
+        for (;;) {
+            thread_sleep();
+        }
+    }
+
+    counter++;
+
+    /* Recursing twice here prevents the compiler from optimizing-out the recursion. */
+    return recurse(counter) + recurse(counter);
+}
+
+static void *thread(void *arg)
+{
+    (void) arg;
+
+    recurse(0);
+
+    return NULL;
+}
+
+int main(void)
+{
+    puts("\nMPU Stack Guard Test\n");
+
+    puts("If the test fails, the canary value will change unexpectedly");
+    puts("after ~150 iterations. If the test succeeds, the MEM MANAGE HANDLER");
+    puts("will trigger a RIOT kernel panic before the canary value changes.\n");
+
+#ifdef MODULE_MPU_STACK_GUARD
+    puts("The mpu_stack_guard module is present. Expect the test to succeed.\n");
+#else
+    puts("The mpu_stack_guard module is missing! Expect the test to fail.\n");
+#endif
+
+    buf.canary = CANARY_VALUE;
+    thread_create(buf.stack, sizeof(buf.stack), THREAD_PRIORITY_MAIN - 1, 0, thread, NULL, "thread");
+
+    return 0;
+}