private MinidumpSegment FindSegment(ulong position)
{
int min = 0;
int max = _segments.Count - 1;
while (min <= max)
{
int mid = (min + max) / 2;
MinidumpSegment current = _segments[mid];
if (position < current.VirtualAddress)
{
max = mid - 1;
}
else if (position >= current.VirtualAddress + current.Size)
{
min = mid + 1;
}
else
{
Debug.Assert(current.Contains(position));
return(current);
}
}
return(null);
}
public MinidumpVirtualAddressSpace(ReadOnlyCollection <MinidumpSegment> segments, IAddressSpace addressSpace)
{
_addressSpace = addressSpace;
_segments = segments;
MinidumpSegment last = segments.Last();
_length = last.VirtualAddress + last.Size;
}
public uint Read(ulong position, byte[] buffer, uint bufferOffset, uint count)
{
if (count == 0)
{
return(0);
}
MinidumpSegment seg = FindSegment(position);
if (seg == null)
{
return(0);
}
// TODO: What if they read past the end of the segment?
Debug.Assert(position >= seg.VirtualAddress);
ulong offset = position - seg.VirtualAddress + seg.FileOffset;
return(_addressSpace.Read(offset, buffer, bufferOffset, count));
}
private List <MinidumpSegment> CreateSegmentList()
{
List <MinidumpSegment> ranges = new List <MinidumpSegment>();
foreach (MinidumpDirectory item in _directory)
{
if (item.StreamType == MinidumpStreamType.MemoryListStream)
{
MinidumpMemoryDescriptor[] memoryRegions = _dataSourceReader.ReadCountedArray <MinidumpMemoryDescriptor>(_position + item.Rva);
foreach (var region in memoryRegions)
{
MinidumpSegment range = new MinidumpSegment(region);
ranges.Add(range);
}
}
else if (item.StreamType == MinidumpStreamType.Memory64ListStream)
{
ulong position = item.Rva;
ulong count = _dataSourceReader.Read <ulong>(ref position);
ulong rva = _dataSourceReader.Read <ulong>(ref position);
MinidumpMemoryDescriptor64[] memoryRegions = _dataSourceReader.ReadArray <MinidumpMemoryDescriptor64>(position + _position, checked ((uint)count));
foreach (var region in memoryRegions)
{
MinidumpSegment range = new MinidumpSegment(region, rva);
ranges.Add(range);
rva += region.DataSize;
}
}
}
ranges.Sort((MinidumpSegment a, MinidumpSegment b) => a.VirtualAddress.CompareTo(b.VirtualAddress));
return(ranges);
}