public void VirtualMemory_TryToReserveInvalidPageSize()
{
// Reserve 1 page with invalid page size
BaselibErrorState errorState = default;
var addressSpace = VirtualMemoryUtility.ReserveAddressSpace(1, 69420, out errorState);
VirtualMemoryUtility.ReportWrappedBaselibError(errorState);
LogAssert.Expect(LogType.Error, new Regex("Baselib error:*"));
VirtualMemoryUtility.FreeAddressSpace(addressSpace, out errorState);
}
public unsafe void VirtualMemory_OvercommitReservedMemory()
{
BaselibErrorState errorState = default;
// Reserve 1 page
var addressSpace = VirtualMemoryUtility.ReserveAddressSpace(1, VirtualMemoryUtility.DefaultPageSizeInBytes, out errorState);
{
// Try to commit 2 pages (will fail).
VMRange pages = new VMRange {
ptr = addressSpace.ptr, log2PageSize = addressSpace.log2PageSize, pageCount = 2
};
VirtualMemoryUtility.CommitMemory(pages, out errorState);
VirtualMemoryUtility.ReportWrappedBaselibError(errorState);
LogAssert.Expect(LogType.Error, new Regex("Baselib error:*"));
var coolByte = (byte *)pages.ptr;
// Try to write to uncommitted memory (will fail and throw an exception).
Assert.Throws <NullReferenceException>(() => *coolByte = 0);
}
VirtualMemoryUtility.FreeAddressSpace(addressSpace, out errorState);
}
public unsafe void VirtualMemory_AllocateAndFreeFromBurst()
{
BaselibErrorState errorState = default;
// Reserve 1GB
var addressSpace = VirtualMemoryUtility.ReserveAddressSpace(1024ul * 256ul, VirtualMemoryUtility.DefaultPageSizeInBytes, out errorState);
{
// 100 pages of ints
const int allocationCount = 100;
var errorStates = new NativeArray <BaselibErrorState>(allocationCount, Allocator.Persistent);
{
for (int i = 0; i < allocationCount; i++)
{
errorStates[i] = default;
}
var commitJob = new CommitJob
{
jobAddressRangePtr = addressSpace.ptr,
jobLog2PageSize = addressSpace.log2PageSize,
jobPageCount = 1,
jobErrorStates = errorStates
};
commitJob.Schedule(allocationCount, 1).Complete();
for (int i = 0; i < allocationCount; i++)
{
VirtualMemoryUtility.ReportWrappedBaselibError(errorStates[i]);
}
// for each page allocated
for (int i = 0; i < allocationCount; i++)
{
var page = (void *)((ulong)addressSpace.ptr + (ulong)i * VirtualMemoryUtility.DefaultPageSizeInBytes);
var allocator = new UnsafeScratchAllocator((void *)addressSpace.ptr, (int)VirtualMemoryUtility.DefaultPageSizeInBytes * allocationCount);
var intCount = ((int)VirtualMemoryUtility.DefaultPageSizeInBytes / sizeof(int));
var numbersInPage = (int *)allocator.Allocate <int>(intCount);
// for each int in the allocated page
for (int j = 0; j < intCount; j++)
{
Assert.AreEqual(j, numbersInPage[j]);
}
}
var decommitJob = new DecommitJob
{
jobAddressRangePtr = addressSpace.ptr,
jobLog2PageSize = addressSpace.log2PageSize,
jobPageCount = 1,
jobErrorStates = errorStates
};
decommitJob.Schedule(allocationCount, 1).Complete();
}
errorStates.Dispose();
}
VirtualMemoryUtility.FreeAddressSpace(addressSpace, out errorState);
}