Add two more addresses to check for the address of the kernel in debug mode;

also add some logging about where lldb is lookin for a kernel as it connects.
<rdar://problem/24454582> 

llvm-svn: 259865

Author: jasonmolenda

lldb/source/Plugins/DynamicLoader/Darwin-Kernel/DynamicLoaderDarwinKernel.cpp

@@ -266,6 +266,16 @@ DynamicLoaderDarwinKernel::SearchForKernelWithDebugHints (Process *process)
         {
             return addr;
         }
+        addr = process->ReadUnsignedIntegerFromMemory (0xfffffff000002010ULL, 8, LLDB_INVALID_ADDRESS, read_err);
+        if (CheckForKernelImageAtAddress (addr, process).IsValid())
+        {
+            return addr;
+        }
+        addr = process->ReadUnsignedIntegerFromMemory (0xfffffff000004010ULL, 8, LLDB_INVALID_ADDRESS, read_err);
+        if (CheckForKernelImageAtAddress (addr, process).IsValid())
+        {
+            return addr;
+        }
     }
     else
     {
@@ -397,9 +407,13 @@ DynamicLoaderDarwinKernel::SearchForKernelViaExhaustiveSearch (Process *process)
 lldb_private::UUID
 DynamicLoaderDarwinKernel::CheckForKernelImageAtAddress (lldb::addr_t addr, Process *process)
 {
+    Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_DYNAMIC_LOADER));
     if (addr == LLDB_INVALID_ADDRESS)
         return UUID();
 
+    if (log)
+        log->Printf ("DynamicLoaderDarwinKernel::CheckForKernelImageAtAddress: looking for kernel binary at 0x%" PRIx64, addr);
+
     // First try a quick test -- read the first 4 bytes and see if there is a valid Mach-O magic field there
     // (the first field of the mach_header/mach_header_64 struct).
 
@@ -450,6 +464,8 @@ DynamicLoaderDarwinKernel::CheckForKernelImageAtAddress (lldb::addr_t addr, Proc
             {
                 process->GetTarget().SetArchitecture (kernel_arch);
             }
+            if (log)
+                log->Printf ("DynamicLoaderDarwinKernel::CheckForKernelImageAtAddress: kernel binary image found at 0x%" PRIx64, addr);
             return memory_module_sp->GetUUID();
         }
     }