adding unit test for vx_malloc

tests/unittest/Makefile

@@ -0,0 +1,8 @@
+all:
+	$(MAKE) -C vx_malloc
+
+run:
+	$(MAKE) -C vx_malloc run
+
+clean:
+	$(MAKE) -C vx_malloc clean

tests/unittest/vx_malloc/Makefile

@@ -0,0 +1,34 @@
+VORTEX_DRV_PATH ?= $(realpath ../../../driver)
+
+CXXFLAGS += -std=c++11 -Wall -Wextra -pedantic -Wfatal-errors
+
+CXXFLAGS += -I$(VORTEX_DRV_PATH)/common
+
+# Debugigng
+ifdef DEBUG
+	CXXFLAGS += -g -O0
+else    
+	CXXFLAGS += -O2 -DNDEBUG
+endif
+
+PROJECT = vx_malloc
+
+SRCS = main.cpp
+
+all: $(PROJECT)
+
+$(PROJECT): $(SRCS)
+	$(CXX) $(CXXFLAGS) $^ $(LDFLAGS) -o $@
+
+run:
+	./$(PROJECT)
+
+clean:
+	rm -rf $(PROJECT) *.o .depend
+
+clean-all: clean
+	rm -rf *.elf *.bin *.dump
+
+ifneq ($(MAKECMDGOALS),clean)
+    -include .depend
+endif

tests/unittest/vx_malloc/main.cpp

@@ -0,0 +1,52 @@
+#include <vx_malloc.h>
+#include <stdio.h>
+
+#define RT_CHECK(_expr)                                         \
+   do {                                                         \
+     int _ret = _expr;                                          \
+     if (0 == _ret)                                             \
+       break;                                                   \
+     printf("Error: '%s' returned %d!\n", #_expr, (int)_ret);   \
+     return -1;                                                 \
+   } while (false)
+
+static uint64_t minAddress = 0;
+static uint64_t maxAddress = 0xffffffff;
+static uint32_t pageAlign  = 4096; 
+static uint32_t blockAlign = 64;
+
+int main() {
+
+    auto allocator = new vortex::MemoryAllocator(
+        minAddress, maxAddress, pageAlign, blockAlign
+    );
+
+    uint64_t a0, a1, a2, a3;
+
+    RT_CHECK(allocator->allocate(128, &a0));
+    RT_CHECK(allocator->release(a0));
+
+    RT_CHECK(allocator->allocate(1, &a0));
+    RT_CHECK(allocator->allocate(1, &a1));
+    RT_CHECK(allocator->allocate(1, &a2));
+    RT_CHECK(allocator->release(a1));
+    RT_CHECK(allocator->allocate(1, &a3));
+    RT_CHECK(allocator->release(a0));
+    RT_CHECK(allocator->release(a2));
+    RT_CHECK(allocator->release(a3));
+
+    RT_CHECK(allocator->allocate(5878, &a0));
+    RT_CHECK(allocator->allocate(4095, &a1));
+    RT_CHECK(allocator->allocate(1, &a2));
+    RT_CHECK(allocator->allocate(1, &a3));
+    RT_CHECK(allocator->release(a0));
+    RT_CHECK(allocator->release(a1));
+    RT_CHECK(allocator->release(a2));
+    RT_CHECK(allocator->release(a3));
+
+    delete allocator;
+
+    printf("PASSED!\n");
+
+    return 0;
+}