From 7042ce8c5cda3c255c6f4c50e9deb999eec53feb Mon Sep 17 00:00:00 2001
From: Greyson Parrelli <greyson@signal.org>
Date: Thu, 9 Jan 2025 09:54:28 -0500
Subject: [PATCH] Ensure that ANR traces are kept within a reasonable size
 range.

---
 .../thoughtcrime/securesms/database/LogDatabase.kt   | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/app/src/main/java/org/thoughtcrime/securesms/database/LogDatabase.kt b/app/src/main/java/org/thoughtcrime/securesms/database/LogDatabase.kt
index ea69387bd7..65b01bc9f8 100644
--- a/app/src/main/java/org/thoughtcrime/securesms/database/LogDatabase.kt
+++ b/app/src/main/java/org/thoughtcrime/securesms/database/LogDatabase.kt
@@ -448,17 +448,27 @@ class LogDatabase private constructor(
           $THREAD_DUMP TEXT NOT NULL
         )
       """
+
+      val MAX_DUMP_SIZE = 1.mebiBytes.inWholeBytes.toInt()
+      const val TRIMMED_FOOTER = "...\n\nTruncated because the dump exceeded 1MiB in size!"
     }
 
     private val readableDatabase: SQLiteDatabase get() = openHelper.readableDatabase
     private val writableDatabase: SQLiteDatabase get() = openHelper.writableDatabase
 
     fun save(currentTime: Long, threadDumps: String) {
+      val trimmedDump = if (threadDumps.length > MAX_DUMP_SIZE) {
+        Log.w(TAG, "Large ANR thread dump! Size: ${threadDumps.length}")
+        threadDumps.substring(0, MAX_DUMP_SIZE - TRIMMED_FOOTER.length) + TRIMMED_FOOTER
+      } else {
+        threadDumps
+      }
+
       writableDatabase
         .insertInto(TABLE_NAME)
         .values(
           CREATED_AT to currentTime,
-          THREAD_DUMP to threadDumps
+          THREAD_DUMP to trimmedDump
         )
         .run()