[PATCH] D125873: [asan] Add the FreeBSD AArch64 shadow offset to llvm

[Andrew Turner via Phabricator via llvm-commits]

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AArch64 has a larger address space than 64 but x86. Use the larger
shadow offset on FreeBSD AArch64.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D125873

Files:
  llvm/lib/Transforms/Instrumentation/AddressSanitizer.cpp


Index: llvm/lib/Transforms/Instrumentation/AddressSanitizer.cpp
===================================================================
--- llvm/lib/Transforms/Instrumentation/AddressSanitizer.cpp
+++ llvm/lib/Transforms/Instrumentation/AddressSanitizer.cpp
@@ -106,6 +106,7 @@
 static const uint64_t kRISCV64_ShadowOffset64 = 0xd55550000;
 static const uint64_t kFreeBSD_ShadowOffset32 = 1ULL << 30;
 static const uint64_t kFreeBSD_ShadowOffset64 = 1ULL << 46;
+static const uint64_t kFreeBSDAArch64_ShadowOffset64 = 1ULL << 47;
 static const uint64_t kFreeBSDKasan_ShadowOffset64 = 0xdffff7c000000000;
 static const uint64_t kNetBSD_ShadowOffset32 = 1ULL << 30;
 static const uint64_t kNetBSD_ShadowOffset64 = 1ULL << 46;
@@ -518,6 +519,8 @@
       Mapping.Offset = kPPC64_ShadowOffset64;
     else if (IsSystemZ)
       Mapping.Offset = kSystemZ_ShadowOffset64;
+    else if (IsFreeBSD && IsAArch64)
+        Mapping.Offset = kFreeBSDAArch64_ShadowOffset64;
     else if (IsFreeBSD && !IsMIPS64) {
       if (IsKasan)
         Mapping.Offset = kFreeBSDKasan_ShadowOffset64;


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