Recognize a platform binary in ProcessGDBRemote which determines plugins

Complete support of the binary-addresses key in the qProcessInfo packet
in ProcessGDBRemote, for detecting if one of the binaries needs to be
handled by a Platform plugin, and can be used to set the Process'
DynamicLoader plugin and the Target's Platform plugin.

Implement this method in PlatformDarwinKernel to recognize a kernel
fileset at that address, find the actual kernel address in the
fileset, set DynamicLoaderDarwinKernel and PlatformDarwinKernel
in the Process/Target; register the kernel address with the dynamic
loader so it will be loaded later during attach.

This patch only addresses the live debug scenario with a gdb remote
serial protocol connection. I'll handle corefiles in a subsequent
patch that builds on this.

Differential Revision: https://reviews.llvm.org/D133534
rdar://98754861

1 files changed, 12 insertions, 1 deletions

diff --git a/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp b/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp
index 2987ba5..d0f98462 100644
--- a/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp
+++ b/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp
@@ -593,8 +593,19 @@ Status ProcessGDBRemote::DoConnectRemote(llvm::StringRef remote_url) {
         UUID uuid;
         const bool value_is_slide = false;
         for (addr_t addr : bin_addrs) {
-          const bool force_symbol_search = true;
           const bool notify = true;
+          // First see if this is a special platform
+          // binary that may determine the DynamicLoader and
+          // Platform to be used in this Process/Target in the
+          // process of loading it.
+          if (GetTarget()
+                  .GetDebugger()
+                  .GetPlatformList()
+                  .LoadPlatformBinaryAndSetup(this, addr, notify))
+            continue;
+
+          const bool force_symbol_search = true;
+          // Second manually load this binary into the Target.
           DynamicLoader::LoadBinaryWithUUIDAndAddress(
               this, uuid, addr, value_is_slide, force_symbol_search, notify);
         }