[compiler-rt] [scudo] Skip test if mlock fails. (PR #168448)

[Christopher Ferris via llvm-commits]

https://github.com/cferris1000 created https://github.com/llvm/llvm-project/pull/168448

Some linux versions might not support the mlock call, so skip that part of the test if the mlock fails.

>From 45dadb4c89dd8e56f506f9b1be58b59edc39939e Mon Sep 17 00:00:00 2001
From: Christopher Ferris <cferris at google.com>
Date: Mon, 17 Nov 2025 13:43:55 -0800
Subject: [PATCH] [scudo] Skip test if mlock fails.

Some linux versions might not support the mlock call, so skip that
part of the test if the mlock fails.
---
 .../lib/scudo/standalone/tests/map_test.cpp   | 22 +++++++++----------
 1 file changed, 11 insertions(+), 11 deletions(-)

diff --git a/compiler-rt/lib/scudo/standalone/tests/map_test.cpp b/compiler-rt/lib/scudo/standalone/tests/map_test.cpp
index afdfe5be85fb6..9d1a35c44679d 100644
--- a/compiler-rt/lib/scudo/standalone/tests/map_test.cpp
+++ b/compiler-rt/lib/scudo/standalone/tests/map_test.cpp
@@ -120,17 +120,17 @@ TEST(ScudoMapTest, Zeroing) {
 #if SCUDO_LINUX
   // Now verify that if madvise fails, the data is still zeroed.
   memset(Data, 1U, MemMap.getCapacity());
-  EXPECT_NE(-1, mlock(Data, MemMap.getCapacity()));
-
-  EXPECT_EQ(1U, Data[0]);
-  EXPECT_EQ(1U, Data[PageSize]);
-  EXPECT_EQ(1U, Data[PageSize * 2]);
-  MemMap.releaseAndZeroPagesToOS(MemMap.getBase(), MemMap.getCapacity());
-  EXPECT_EQ(0U, Data[0]);
-  EXPECT_EQ(0U, Data[PageSize]);
-  EXPECT_EQ(0U, Data[PageSize * 2]);
-
-  EXPECT_NE(-1, munlock(Data, MemMap.getCapacity()));
+  if (mlock(Data, MemMap.getCapacity()) != -1) {
+    EXPECT_EQ(1U, Data[0]);
+    EXPECT_EQ(1U, Data[PageSize]);
+    EXPECT_EQ(1U, Data[PageSize * 2]);
+    MemMap.releaseAndZeroPagesToOS(MemMap.getBase(), MemMap.getCapacity());
+    EXPECT_EQ(0U, Data[0]);
+    EXPECT_EQ(0U, Data[PageSize]);
+    EXPECT_EQ(0U, Data[PageSize * 2]);
+
+    EXPECT_NE(-1, munlock(Data, MemMap.getCapacity()));
+  }
 #endif
 
   MemMap.unmap();