patch: fix 0001

0001-art-mem-map-fix-mmap-on-kernel-518.patch

@@ -1,23 +1,9 @@
-From: rubenslte-builder <builder@rubenslte>
-Date: Sat, 13 Sep 2026 21:00:00 +0200
-Subject: [PATCH 1/1] art-mem-map-fix-mmap-on-kernel-518
-
-Workaround for mmap error when building on Linux kernel 5.18+.
-Adds MAP_FIXED_NOREPLACE in MapFileAtAddress (host builds only,
-guarded by #if !defined(ART_TARGET)), forcing the kernel to honor
-the expected address instead of mapping at a different one.
-
-Fixes: android-review.googlesource.com/c/platform/art/+/673bd2c638ed82bbe71cf7d645d433973a624e4f
-Bug: 23318356
----
- diff --git a/art/runtime/mem_map.cc b/art/runtime/mem_map.cc
- index b9d51c1..f034a3d 100644
- --- a/art/runtime/mem_map.cc
- +++ b/art/runtime/mem_map.cc
- @@ -393,7 +393,12 @@
-      DCHECK(ContainedWithinExistingMap(expected_ptr, byte_count, error_msg))
-          << ((error_msg != nullptr) ? *error_msg : std::string());
-      flags |= MAP_FIXED;
+--- a/art/runtime/mem_map.cc	2026-09-17 09:32:04.741988772 +0200
++++ b/art/runtime/mem_map.cc	2026-09-17 09:32:26.208150692 +0200
+@@ -393,6 +393,11 @@
+     DCHECK(ContainedWithinExistingMap(expected_ptr, byte_count, error_msg))
+         << ((error_msg != nullptr) ? *error_msg : std::string());
+     flags |= MAP_FIXED;
 +#if !defined(ART_TARGET)
 +  } else if (expected_ptr) {
 +#define MAP_FIXED_NOREPLACE 0x100000
@@ -26,4 +12,3 @@ Bug: 23318356
    } else {
      CHECK_EQ(0, flags & MAP_FIXED);
      // Don't bother checking for an overlapping region here. We'll
-     // check this if required after the fact inside CheckMapRequest.