private MetadataRegion FindRegion(ulong address)
{
if (!_regionInitialized)
{
// Need to set this before enumerating the runtimes to prevent reentrancy
_regionInitialized = true;
var runtimes = RuntimeService.EnumerateRuntimes();
if (runtimes.Any())
{
foreach (IRuntime runtime in runtimes)
{
Trace.TraceInformation($"FindRegion: initializing regions for runtime #{runtime.Id}");
ClrRuntime clrRuntime = runtime.Services.GetService <ClrRuntime>();
if (clrRuntime != null)
{
Trace.TraceInformation($"FindRegion: initializing regions for CLR runtime #{runtime.Id}");
_regions = clrRuntime.EnumerateModules()
.Where((module) => module.MetadataAddress != 0 && module.IsPEFile && !module.IsDynamic)
.Select((module) => new MetadataRegion(this, module))
.ToImmutableArray()
.Sort();
}
}
}
else
{
// If there are no runtimes, try again next time around
_regionInitialized = false;
}
}
if (_regions != null)
{
int min = 0, max = _regions.Length - 1;
while (min <= max)
{
int mid = (min + max) / 2;
MetadataRegion region = _regions[mid];
if (address >= region.StartAddress && address < region.EndAddress)
{
return(region);
}
if (region.StartAddress < address)
{
min = mid + 1;
}
else
{
max = mid - 1;
}
}
}
return(null);
}
/// <summary>
/// Read memory out of the target process.
/// </summary>
/// <param name="address">The address of memory to read</param>
/// <param name="buffer">The buffer to read memory into</param>
/// <param name="bytesRead">The number of bytes actually read out of the target process</param>
/// <returns>true if any bytes were read at all, false if the read failed (and no bytes were read)</returns>
public bool ReadMemory(ulong address, Span <byte> buffer, out int bytesRead)
{
Debug.Assert((address & ~_memoryService.SignExtensionMask()) == 0);
if (buffer.Length > 0)
{
MetadataRegion region = FindRegion(address);
if (region != null)
{
if (region.ReadMetaData(address, buffer, out bytesRead))
{
return(true);
}
}
}
return(_memoryService.ReadMemory(address, buffer, out bytesRead));
}
private MetadataRegion FindRegion(ulong address)
{
if (!_regionInitialized)
{
_regionInitialized = true;
Trace.TraceInformation($"FindRegion: initializing regions for runtime #{_runtime.Id}");
ClrRuntime clrruntime = _runtime.Services.GetService <ClrRuntime>();
if (clrruntime != null)
{
_regions = clrruntime.EnumerateModules()
.Where((module) => module.MetadataAddress != 0 && module.IsPEFile && !module.IsDynamic)
.Select((module) => new MetadataRegion(this, module))
.ToImmutableArray()
.Sort();
}
}
if (_regions != null)
{
int min = 0, max = _regions.Length - 1;
while (min <= max)
{
int mid = (min + max) / 2;
MetadataRegion region = _regions[mid];
if (address >= region.StartAddress && address < region.EndAddress)
{
return(region);
}
if (region.StartAddress < address)
{
min = mid + 1;
}
else
{
max = mid - 1;
}
}
}
return(null);
}
