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, 27 insertions, 0 deletions

diff --git a/lldb/source/Plugins/ObjectFile/Mach-O/ObjectFileMachO.cpp b/lldb/source/Plugins/ObjectFile/Mach-O/ObjectFileMachO.cpp
index 5f82422..2f2d34d 100644
--- a/lldb/source/Plugins/ObjectFile/Mach-O/ObjectFileMachO.cpp
+++ b/lldb/source/Plugins/ObjectFile/Mach-O/ObjectFileMachO.cpp
@@ -5449,6 +5449,33 @@ UUID
 ObjectFileMachO::GetProcessSharedCacheUUID (Process *process)
 {
     UUID uuid;
+
+    // First see if we can get the shared cache details from debugserver
+    if (process)
+    {
+        StructuredData::ObjectSP info = process->GetSharedCacheInfo();
+        StructuredData::Dictionary *info_dict = nullptr;
+        if (info.get() && info->GetAsDictionary())
+        {
+            info_dict = info->GetAsDictionary();
+        }
+
+        // {"shared_cache_base_address":140735683125248,"shared_cache_uuid":"DDB8D70C-C9A2-3561-B2C8-BE48A4F33F96","no_shared_cache":false,"shared_cache_private_cache":false}
+
+        if (info_dict
+            && info_dict->HasKey("shared_cache_uuid")
+            && info_dict->HasKey("no_shared_cache")
+            && info_dict->HasKey("shared_cache_base_address"))
+        {
+            bool process_using_shared_cache = info_dict->GetValueForKey("no_shared_cache")->GetBooleanValue() == false;
+            std::string uuid_str = info_dict->GetValueForKey("shared_cache_uuid")->GetStringValue();
+
+            if (process_using_shared_cache && !uuid_str.empty() && uuid.SetFromCString (uuid_str.c_str()) == 0)
+                return uuid;
+        }
+    }
+
+    // Fall back to trying to read the shared cache info out of dyld's internal data structures
     if (process)
     {
         addr_t all_image_infos = process->GetImageInfoAddress();