public int ReadAt(IDebugMemoryContext2 pStartContext, uint dwCount, byte[] rgbMemory, out uint pdwRead, ref uint pdwUnreadable)
{
pdwUnreadable = 0;
AD7MemoryAddress addr = (AD7MemoryAddress)pStartContext;
uint bytesRead = 0;
int hr = Constants.S_OK;
DebuggedProcess.WorkerThread.RunOperation(async() =>
{
bytesRead = await DebuggedProcess.ReadProcessMemory(addr.Address, dwCount, rgbMemory);
});
if (bytesRead == uint.MaxValue)
{
bytesRead = 0;
}
if (bytesRead < dwCount) // copied from Concord
{
// assume 4096 sized pages: ARM has 4K or 64K pages
uint pageSize = 4096;
ulong readEnd = addr.Address + bytesRead;
ulong nextPageStart = (readEnd + pageSize - 1) / pageSize * pageSize;
if (nextPageStart == readEnd)
{
nextPageStart = readEnd + pageSize;
}
// if we have crossed a page boundry - Unreadable = bytes till end of page
uint maxUnreadable = dwCount - bytesRead;
if (addr.Address + dwCount > nextPageStart)
{
pdwUnreadable = (uint)Math.Min(maxUnreadable, nextPageStart - readEnd);
}
else
{
pdwUnreadable = (uint)Math.Min(maxUnreadable, pageSize);
}
}
pdwRead = bytesRead;
return(hr);
}
