[compiler-rt] [sanitizer_common] Add arm64e module type (PR #166018)

[Andrew Haberlandt via llvm-commits]

https://github.com/ndrewh created https://github.com/llvm/llvm-project/pull/166018

This will fix some symbolication failures on arm64e machines when the symbolicator passes the architecture string to atos.

>From e431780d37dd03cd419879035f44a0f365e4e66b Mon Sep 17 00:00:00 2001
From: Andrew Haberlandt <ahaberlandt at apple.com>
Date: Sat, 1 Nov 2025 13:14:12 -0700
Subject: [PATCH] [sanitizer_common] Add arm64e module type

This will fix some symbolication failures on arm64e machines when the symbolicator
passes the architecture string to atos.
---
 compiler-rt/lib/asan/scripts/asan_symbolize.py                | 1 +
 compiler-rt/lib/sanitizer_common/sanitizer_common.h           | 3 +++
 compiler-rt/lib/sanitizer_common/sanitizer_procmaps_mac.cpp   | 4 ++++
 .../lib/sanitizer_common/tests/sanitizer_procmaps_test.cpp    | 2 +-
 4 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/compiler-rt/lib/asan/scripts/asan_symbolize.py b/compiler-rt/lib/asan/scripts/asan_symbolize.py
index 8ecd66c745119..091e9bcc9a796 100755
--- a/compiler-rt/lib/asan/scripts/asan_symbolize.py
+++ b/compiler-rt/lib/asan/scripts/asan_symbolize.py
@@ -59,6 +59,7 @@ def is_valid_arch(s):
         "armv7s",
         "armv7k",
         "arm64",
+        "arm64e",
         "powerpc64",
         "powerpc64le",
         "s390x",
diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_common.h b/compiler-rt/lib/sanitizer_common/sanitizer_common.h
index ba85a0eb5a35e..b515b15b327d8 100644
--- a/compiler-rt/lib/sanitizer_common/sanitizer_common.h
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_common.h
@@ -737,6 +737,7 @@ enum ModuleArch {
   kModuleArchARMV7S,
   kModuleArchARMV7K,
   kModuleArchARM64,
+  kModuleArchARM64E,
   kModuleArchLoongArch64,
   kModuleArchRISCV64,
   kModuleArchHexagon
@@ -810,6 +811,8 @@ inline const char *ModuleArchToString(ModuleArch arch) {
       return "armv7k";
     case kModuleArchARM64:
       return "arm64";
+    case kModuleArchARM64E:
+      return "arm64e";
     case kModuleArchLoongArch64:
       return "loongarch64";
     case kModuleArchRISCV64:
diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_procmaps_mac.cpp b/compiler-rt/lib/sanitizer_common/sanitizer_procmaps_mac.cpp
index a9533d6fc04ca..74713352b1abd 100644
--- a/compiler-rt/lib/sanitizer_common/sanitizer_procmaps_mac.cpp
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_procmaps_mac.cpp
@@ -32,6 +32,9 @@
 #ifndef CPU_TYPE_ARM64
 #define CPU_TYPE_ARM64        (CPU_TYPE_ARM | CPU_ARCH_ABI64)
 #endif
+#ifndef CPU_SUBTYPE_ARM64E
+#define CPU_SUBTYPE_ARM64E   ((cpu_subtype_t)2)
+#endif
 
 namespace __sanitizer {
 
@@ -323,6 +326,7 @@ ModuleArch ModuleArchFromCpuType(cpu_type_t cputype, cpu_subtype_t cpusubtype) {
       CHECK(0 && "Invalid subtype of ARM");
       return kModuleArchUnknown;
     case CPU_TYPE_ARM64:
+      if (cpusubtype == CPU_SUBTYPE_ARM64E) return kModuleArchARM64E;
       return kModuleArchARM64;
     default:
       CHECK(0 && "Invalid CPU type");
diff --git a/compiler-rt/lib/sanitizer_common/tests/sanitizer_procmaps_test.cpp b/compiler-rt/lib/sanitizer_common/tests/sanitizer_procmaps_test.cpp
index 00542b944f516..c18e5bd9f3194 100644
--- a/compiler-rt/lib/sanitizer_common/tests/sanitizer_procmaps_test.cpp
+++ b/compiler-rt/lib/sanitizer_common/tests/sanitizer_procmaps_test.cpp
@@ -70,7 +70,7 @@ TEST(MemoryMapping, LoadedModuleArchAndUUID) {
         EXPECT_EQ(arch, kModuleArchI386);
       } else if (SANITIZER_WORDSIZE == 64) {
         EXPECT_TRUE(arch == kModuleArchX86_64 || arch == kModuleArchX86_64H ||
-                    arch == kModuleArchARM64);
+                    arch == kModuleArchARM64 || arch == kModuleArchARM64E);
       }
       const u8 *uuid = modules[i].uuid();
       u8 null_uuid[kModuleUUIDSize] = {0};