From d909dadc8ddd83c1597426ebc187ee840f04588c Mon Sep 17 00:00:00 2001
From: Patrick Rohr <prohr@google.com>
Date: Wed, 11 Jun 2025 13:14:54 -0700
Subject: [PATCH] Change mIfaceMatch to precompiled Pattern

See ag/33952010.

Test: TH
Flag: EXEMPT mainline
Bug: 1000001
Change-Id: I29694e9b60a24f21290f903760dc96cb679b46e2
---
 .../src/com/android/server/ethernet/EthernetTracker.java    | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/service-t/src/com/android/server/ethernet/EthernetTracker.java b/service-t/src/com/android/server/ethernet/EthernetTracker.java
index 51bf00cae8..fe608683b5 100644
--- a/service-t/src/com/android/server/ethernet/EthernetTracker.java
+++ b/service-t/src/com/android/server/ethernet/EthernetTracker.java
@@ -131,7 +131,7 @@ public class EthernetTracker {
      * Use shouldTrackInterface to check if a interface name is a valid ethernet interface (this
      * includes test interfaces if setIncludeTestInterfaces is set to true).
      */
-    private final String mIfaceMatch;
+    private final Pattern mIfaceMatch;
 
     /**
      * Track test interfaces if true, don't track otherwise.
@@ -311,7 +311,7 @@ public class EthernetTracker {
                 ifaceMatchRegex = "eth\\d+";
             }
         }
-        mIfaceMatch = ifaceMatchRegex;
+        mIfaceMatch = Pattern.compile(ifaceMatchRegex);
 
         // Read default Ethernet interface configuration from resources
         final String[] interfaceConfigs = mDeps.getInterfaceConfigFromResource(context);
@@ -829,7 +829,7 @@ public class EthernetTracker {
     }
 
     private boolean shouldTrackInterface(String iface) {
-        return iface.matches(mIfaceMatch) || isValidTestInterface(iface);
+        return mIfaceMatch.matcher(iface).matches() || isValidTestInterface(iface);
     }
 
     /**