From 90c193d72b2b5ace0f35d7ae7db31cb0eeb010fb Mon Sep 17 00:00:00 2001
From: Antoine Pitrou <antoine@python.org>
Date: Tue, 7 Oct 2025 17:35:01 +0200
Subject: [PATCH 1/2] GH-47742: [C++][CI] Silence Valgrind leak on protobuf
 initialization

---
 cpp/valgrind.supp | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/cpp/valgrind.supp b/cpp/valgrind.supp
index 2289e819e3d..5d28150c9c4 100644
--- a/cpp/valgrind.supp
+++ b/cpp/valgrind.supp
@@ -82,3 +82,15 @@
     fun:curl_share_init
     fun:*Azure*CurlConnection*
 }
+{
+    <protobuf>:leak on library initialization
+    Memcheck:Leak
+    ...
+    fun:*google*protobuf*AddDescriptors*
+}
+{
+    <protobuf>:leak on library initialization
+    Memcheck:Leak
+    ...
+    fun:*google*protobuf*RegisterGeneratedFile*
+}

From 8bccf7dfc0d279b0e7646df3f5d53bab9e29ede6 Mon Sep 17 00:00:00 2001
From: Antoine Pitrou <antoine@python.org>
Date: Tue, 7 Oct 2025 21:20:31 +0200
Subject: [PATCH 2/2] Use exact function names

---
 cpp/valgrind.supp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/cpp/valgrind.supp b/cpp/valgrind.supp
index 5d28150c9c4..6a2ad3f6b3b 100644
--- a/cpp/valgrind.supp
+++ b/cpp/valgrind.supp
@@ -86,11 +86,11 @@
     <protobuf>:leak on library initialization
     Memcheck:Leak
     ...
-    fun:*google*protobuf*AddDescriptors*
+    fun:*google*protobuf*AddDescriptorsRunner*
 }
 {
     <protobuf>:leak on library initialization
     Memcheck:Leak
     ...
-    fun:*google*protobuf*RegisterGeneratedFile*
+    fun:*google*protobuf*InternalRegisterGeneratedFile*
 }