Add support to get the shared cache information from the new

debugserver jGetSharedCacheInfo packet instead of reading 
the dyld internal data structures directly.  This code is 
(currently) only used for ios native lldb's - I should really
move this ObjectFileMachO::GetProcessSharedCacheUUID method
somewhere else, it makes less and less sense being in the
file reader.

<rdar://problem/25251243> 

llvm-svn: 276369

1 files changed, 37 insertions, 0 deletions

diff --git a/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp b/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp
index 728c5123dda..1cea670bd72 100644
--- a/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp
+++ b/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp
@@ -4270,6 +4270,43 @@ ProcessGDBRemote::GetLoadedDynamicLibrariesInfos_sender (StructuredData::ObjectS
 
 
 
+StructuredData::ObjectSP
+ProcessGDBRemote::GetSharedCacheInfo ()
+{
+    StructuredData::ObjectSP object_sp;
+    StructuredData::ObjectSP args_dict(new StructuredData::Dictionary());
+
+    if (m_gdb_comm.GetSharedCacheInfoSupported())
+    {
+        StreamString packet;
+        packet << "jGetSharedCacheInfo:";
+        args_dict->Dump (packet, false);
+
+        // FIXME the final character of a JSON dictionary, '}', is the escape
+        // character in gdb-remote binary mode.  lldb currently doesn't escape
+        // these characters in its packet output -- so we add the quoted version
+        // of the } character here manually in case we talk to a debugserver which
+        // un-escapes the characters at packet read time.
+        packet << (char) (0x7d ^ 0x20);
+
+        StringExtractorGDBRemote response;
+        response.SetResponseValidatorToJSON();
+        if (m_gdb_comm.SendPacketAndWaitForResponse(packet.GetData(), packet.GetSize(), response, false) == GDBRemoteCommunication::PacketResult::Success)
+        {
+            StringExtractorGDBRemote::ResponseType response_type = response.GetResponseType();
+            if (response_type == StringExtractorGDBRemote::eResponse)
+            {
+                if (!response.Empty())
+                {
+                    object_sp = StructuredData::ParseJSON (response.GetStringRef());
+                }
+            }
+        }
+    }
+    return object_sp;
+}
+
+
 // Establish the largest memory read/write payloads we should use.
 // If the remote stub has a max packet size, stay under that size.
 //