From 01bdaaea84d82edebe48ab432e3a304ac49a42f2 Mon Sep 17 00:00:00 2001
From: Greyson Parrelli <greyson@signal.org>
Date: Mon, 30 Mar 2026 16:05:14 +0000
Subject: [PATCH] Improve ANR stack trace perf.

---
 .../main/java/org/signal/core/util/concurrent/AnrDetector.kt   | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/core/util/src/main/java/org/signal/core/util/concurrent/AnrDetector.kt b/core/util/src/main/java/org/signal/core/util/concurrent/AnrDetector.kt
index fcada855fd..6a7c5b7b04 100644
--- a/core/util/src/main/java/org/signal/core/util/concurrent/AnrDetector.kt
+++ b/core/util/src/main/java/org/signal/core/util/concurrent/AnrDetector.kt
@@ -119,10 +119,9 @@ object AnrDetector {
     }
 
     private fun getMainThreadDump(): String {
-      val dump: Map<Thread, Array<StackTraceElement>> = Thread.getAllStackTraces()
       val mainThread = Looper.getMainLooper().thread
       val date = dateFormat.format(Date())
-      val dumpString = dump[mainThread]?.joinToString(separator = "\n") ?: "Not available."
+      val dumpString = mainThread.stackTrace.takeIf { it.isNotEmpty() }?.joinToString(separator = "\n") ?: "Not available."
 
       return "--- $date:\n$dumpString"
     }