mem: add mprotect tests

JIRA: RTOS-666

Makefile.host

@@ -1,3 +1,4 @@
 DEFAULT_COMPONENTS = $(filter test_meterfs_%,$(ALL_COMPONENTS))
 DEFAULT_COMPONENTS += $(SAMPLE_TESTS)
 DEFAULT_COMPONENTS += $(LIBC_UNIT_TESTS)
+DEFAULT_COMPONENTS += test-mprotect

mem/Makefile

@@ -1,10 +1,25 @@
 #
-# Makefile for libphoenix tests
+# Makefile for mem tests
 #
 # Copyright 2019 Phoenix Systems
 #
 # %LICENSE%
 #
 
+# LEGACY 
 $(eval $(call add_test, test_mmap))
 $(eval $(call add_test, test_malloc))
+
+# UNITY
+
+NAME := test-mprotect
+LOCAL_SRCS := test_mprotect.c
+DEP_LIBS := unity
+
+include $(binary.mk)
+
+NAME := test-mprotect-fault
+LOCAL_SRCS := test_mprotect_fault.c
+DEP_LIBS := unity
+
+include $(binary.mk)

mem/fault_harness.py

@@ -0,0 +1,9 @@
+from trunner.ctx import TestContext
+from trunner.dut import Dut
+from trunner.types import TestResult, Status
+
+
+def harness(dut: Dut, ctx: TestContext, result: TestResult):
+    dut.expect("Exception", timeout=30)
+
+    return TestResult(status=Status.OK)

mem/test.yaml

@@ -0,0 +1,19 @@
+test:
+  tests:
+    - name: mprotect-fault
+      harness: fault_harness.py
+      execute: test-mprotect-fault
+      targets:
+        # mprotect: is noop on NOMMU architecture
+        exclude: [armv7m7-imxrt106x-evk, armv7m7-imxrt117x-evk, armv7m4-stm32l4x6-nucleo]
+
+    - name: mprotect
+      type: unity
+      execute: test-mprotect
+      # FIXME: this reboot is placed here as after mprotect-fault is run target need to be rebooter.
+      # Currently rebooting after the test is not implemented in the runner.
+      reboot: True
+      targets:
+        # mprotect: is noop on NOMMU architecture
+        exclude: [armv7m7-imxrt106x-evk, armv7m7-imxrt117x-evk, armv7m4-stm32l4x6-nucleo]
+

mem/test_mprotect.c

@@ -0,0 +1,86 @@
+/*
+ * Phoenix-RTOS
+ *
+ * phoenix-rtos-test
+ *
+ * mprotect syscall tests
+ *
+ * Copyright 2023 Phoenix Systems
+ * Author: Hubert Badocha
+ *
+ * This file is part of Phoenix-RTOS.
+ *
+ * %LICENSE%
+ */
+
+#include <sys/mman.h>
+#include <pthread.h>
+#include <unistd.h>
+#include <errno.h>
+
+#include "unity_fixture.h"
+
+
+#define PAGES 4
+
+
+static long page_size;
+
+
+TEST_GROUP(test_mprotect);
+
+
+TEST_SETUP(test_mprotect)
+{
+	page_size = sysconf(_SC_PAGESIZE);
+}
+
+
+TEST_TEAR_DOWN(test_mprotect)
+{
+}
+
+
+TEST(test_mprotect, test_mprotect_singlecore)
+{
+	unsigned char *area = mmap(NULL, page_size * PAGES, PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
+	TEST_ASSERT(area != MAP_FAILED);
+
+	for (int page = 0; page < PAGES; page++) {
+		area[page * page_size] = 0x42;
+	}
+
+	TEST_ASSERT_EQUAL(0, mprotect(area, page_size * PAGES, PROT_READ));
+
+	for (int page = 0; page < PAGES; page++) {
+		TEST_ASSERT_EQUAL(0x42, area[page * page_size]);
+	}
+
+	TEST_ASSERT_EQUAL(0, mprotect(area, page_size * PAGES, PROT_READ | PROT_WRITE));
+
+	for (int page = 0; page < PAGES; page++) {
+		area[(page * page_size) + 0x6] = 0x9;
+		TEST_ASSERT_EQUAL(0x9, area[(page * page_size) + 0x6]);
+	}
+
+	TEST_ASSERT_EQUAL(0, munmap(area, page_size * PAGES));
+}
+
+TEST_GROUP_RUNNER(test_mprotect)
+{
+	RUN_TEST_CASE(test_mprotect, test_mprotect_singlecore);
+}
+
+
+static void runner(void)
+{
+	RUN_TEST_GROUP(test_mprotect);
+}
+
+
+int main(int argc, char *argv[])
+{
+	UnityMain(argc, (const char **)argv, runner);
+
+	return 0;
+}

mem/test_mprotect_fault.c

@@ -0,0 +1,68 @@
+/*
+ * Phoenix-RTOS
+ *
+ * phoenix-rtos-test
+ *
+ * mprotect syscall tests
+ *
+ * Copyright 2023 Phoenix Systems
+ * Author: Hubert Badocha
+ *
+ * This file is part of Phoenix-RTOS.
+ *
+ * %LICENSE%
+ */
+
+#include <sys/mman.h>
+#include <pthread.h>
+#include <unistd.h>
+#include <errno.h>
+
+#include "unity_fixture.h"
+
+
+TEST_GROUP(test_mprotect_fault);
+
+
+TEST_SETUP(test_mprotect_fault)
+{
+}
+
+
+TEST_TEAR_DOWN(test_mprotect_fault)
+{
+}
+
+
+TEST(test_mprotect_fault, unit)
+{
+	long pageSize = sysconf(_SC_PAGESIZE);
+	long totalSize = 4 * pageSize;
+	volatile unsigned char *area = mmap(NULL, totalSize, PROT_READ | PROT_WRITE, MAP_ANONYMOUS, -1, 0);
+	TEST_ASSERT(area != MAP_FAILED);
+
+	TEST_ASSERT_EQUAL(0, mprotect((void *)area, totalSize, PROT_READ));
+
+	area[0] = 0x42; /* Should generate fault. */
+	TEST_ASSERT_NOT_EQUAL(0x42, area[0]);
+}
+
+
+TEST_GROUP_RUNNER(test_mprotect_fault)
+{
+	RUN_TEST_CASE(test_mprotect_fault, unit);
+}
+
+
+static void runner(void)
+{
+	RUN_TEST_GROUP(test_mprotect_fault);
+}
+
+
+int main(int argc, char *argv[])
+{
+	UnityMain(argc, (const char **)argv, runner);
+
+	return 0;
+}