[Lldb-commits] [lldb] [lldb][Linux] Add overlay and effective permissions to "memory region" (PR #184115)

[Omair Javaid via lldb-commits]

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@@ -152,6 +152,31 @@ class ABI : public PluginInterface {
 
   static lldb::ABISP FindPlugin(lldb::ProcessSP process_sp, const ArchSpec &arch);
 
+  struct MemoryPermissions {
+    // Both of these are sets of lldb::Permissions values.
+    // Overlay are the permissions being applied to the original permissions.
+    uint32_t overlay;
+    // Effective is the result of applying the overlay to the original
+    // permissions. Calculating this is done by the plugin because some
+    // permission overlays are done as positive (add permissions) and some as
+    // negative (remove permissions).
+    uint32_t effective;
+  };
+
+  /// Get the permissions being overlayed for a given memory key, and the
+  /// resulting permissions after applying the overlay. Typically the protection
+  /// key is used to look up in some architecture specific set of permissions.
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omjavaid wrote:

Is the protection key region specific or it has something to do with TLBs.

https://github.com/llvm/llvm-project/pull/184115