/// <summary>
/// Attempts to retrieve the path to the binary from a running process
/// Returns null on failure
/// </summary>
/// <param name="processId">The process to get the binary for</param>
/// <returns>The path to the primary executable or null if it could not be determined</returns>
private static string GetBinaryPathFromPid(int processId)
{
string programBinary = null;
try
{
CorPublish.CorPublish cp = new CorPublish.CorPublish();
CorPublish.CorPublishProcess cpp = cp.GetProcess(processId);
programBinary = cpp.DisplayName;
}
catch
{
// try an alternate method
using (ProcessSafeHandle ph = CorDebug.NativeMethods.OpenProcess(
(int)(CorDebug.NativeMethods.ProcessAccessOptions.ProcessVMRead |
CorDebug.NativeMethods.ProcessAccessOptions.ProcessQueryInformation |
CorDebug.NativeMethods.ProcessAccessOptions.ProcessDupHandle |
CorDebug.NativeMethods.ProcessAccessOptions.Synchronize),
false, // inherit handle
processId))
{
if (!ph.IsInvalid)
{
StringBuilder sb = new StringBuilder(CorDebug.NativeMethods.MAX_PATH);
int neededSize = sb.Capacity;
CorDebug.NativeMethods.QueryFullProcessImageName(ph, 0, sb, ref neededSize);
programBinary = sb.ToString();
}
}
}
return(programBinary);
}
/// <summary>
/// Attach to a process with the given Process ID
/// </summary>
/// <param name="processId">The Process ID to attach to.</param>
/// <returns>The resulting MDbgProcess.</returns>
public MDbgProcess Attach(int processId)
{
string deeVersion;
try
{
deeVersion = CorDebugger.GetDebuggerVersionFromPid(processId);
}
catch
{
// GetDebuggerVersionFromPid isn't implemented on Win9x and so will
// throw NotImplementedException. We'll also get an ArgumentException
// if the specified process doesn't have the CLR loaded yet.
// Rather than be selective (and potentially brittle), we'll handle all errors.
// Ideally we'd assert (or log) that we're only getting the errors we expect,
// but it's complex and ugly to do that in C#.
// Fall back to guessing the version based on the filename.
// Environment variables (eg. COMPLUS_Version) may have resulted
// in a different choice.
try
{
CorPublish.CorPublish cp = new CorPublish.CorPublish();
CorPublish.CorPublishProcess cpp = cp.GetProcess(processId);
string programBinary = cpp.DisplayName;
deeVersion = CorDebugger.GetDebuggerVersionFromFile(programBinary);
}
catch
{
// This will also fail if the process doesn't have the CLR loaded yet.
// It could also fail if the image EXE has been renamed since it started.
// For whatever reason, fall back to using the default CLR
deeVersion = null;
}
}
MDbgProcess p = m_processMgr.CreateLocalProcess(deeVersion);
p.Attach(processId);
return(p);
}
