[compiler-rt] [compiler-rt] [Darwin] VerifyMemoryMapping should ignore zero-size sections (PR #175083)

[Andrew Haberlandt via llvm-commits]

https://github.com/ndrewh created https://github.com/llvm/llvm-project/pull/175083

Zero size sections cause VerifyMemoryMapping to falsely report overlapping mappings.

rdar://167467041

>From 16981827571bb0e15a8e903dabc930a199158223 Mon Sep 17 00:00:00 2001
From: Andrew Haberlandt <ahaberlandt at apple.com>
Date: Thu, 8 Jan 2026 14:41:55 -0800
Subject: [PATCH] [compiler-rt] [Darwin] VerifyMemoryMapping should ignore
 zero-size sections

Zero size sections cause VerifyMemoryMapping to falsely report overlapping
mappings.

rdar://167467041
---
 compiler-rt/lib/sanitizer_common/sanitizer_procmaps_mac.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_procmaps_mac.cpp b/compiler-rt/lib/sanitizer_common/sanitizer_procmaps_mac.cpp
index f40fba6bf7151..979729f15aa16 100644
--- a/compiler-rt/lib/sanitizer_common/sanitizer_procmaps_mac.cpp
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_procmaps_mac.cpp
@@ -67,6 +67,8 @@ static bool VerifyMemoryMapping(MemoryMappingLayout* mapping) {
   InternalMmapVector<LoadedModule::AddressRange> segments;
   for (uptr i = 0; i < modules.size(); ++i) {
     for (auto& range : modules[i].ranges()) {
+      if (range.beg == range.end)
+        continue;
       segments.push_back(range);
     }
   }