From ced01f367183520e4b1a21dadfc1c3be044f5be3 Mon Sep 17 00:00:00 2001
From: Julian Lettner <yln@users.noreply.github.com>
Date: Tue, 14 Oct 2025 13:01:24 -0700
Subject: [lldb][Darwin] Add `process launch --memory-tagging` option (#162944)

For debugging and bug-finding workflows on Darwin, support
launching processes with memory tagging for binaries that are
not entitled.

This will cause the process to behave as if the binary was entitled
with:
```
<key>com.apple.security.hardened-process.checked-allocations</key>
<true/>
```

This has no effect on hardware without MTE support.

---------

Co-authored-by: Jonas Devlieghere <jonas@devlieghere.com>
---
 lldb/source/Commands/CommandOptionsProcessLaunch.cpp | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'lldb/source/Commands/CommandOptionsProcessLaunch.cpp')

diff --git a/lldb/source/Commands/CommandOptionsProcessLaunch.cpp b/lldb/source/Commands/CommandOptionsProcessLaunch.cpp
index 21d94d68ceb9..8ae20bd76f45 100644
--- a/lldb/source/Commands/CommandOptionsProcessLaunch.cpp
+++ b/lldb/source/Commands/CommandOptionsProcessLaunch.cpp
@@ -127,6 +127,10 @@ Status CommandOptionsProcessLaunch::SetOptionValue(
     break;
   }
 
+  case 'M':
+    launch_info.GetFlags().Set(eLaunchFlagMemoryTagging);
+    break;
+
   case 'c':
     if (!option_arg.empty())
       launch_info.SetShell(FileSpec(option_arg));
-- 
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