[compiler-rt] [hwasan] Add config for AArch64 Linux with 39-bit VA. (PR #170927)

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llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-compiler-rt-sanitizer

Author: Eli Friedman (efriedma-quic)

<details>
<summary>Changes</summary>

This is leveraging work which has already been done for Android, which ships 39-bit VA kernels, and extending it to other embedded Linux targets.

(SANITIZER_AARCH64_39BIT_VA was added in 58c8f57681.)

---
Full diff: https://github.com/llvm/llvm-project/pull/170927.diff


1 Files Affected:

- (modified) compiler-rt/lib/hwasan/hwasan_allocator.h (+1-1) 


``````````diff
diff --git a/compiler-rt/lib/hwasan/hwasan_allocator.h b/compiler-rt/lib/hwasan/hwasan_allocator.h
index 2ada2a0b1851a..94fd7b2f7467b 100644
--- a/compiler-rt/lib/hwasan/hwasan_allocator.h
+++ b/compiler-rt/lib/hwasan/hwasan_allocator.h
@@ -74,7 +74,7 @@ struct AP64 {
 #if defined(HWASAN_ALIASING_MODE)
   static const uptr kSpaceSize = 1ULL << kAddressTagShift;
   typedef __sanitizer::DefaultSizeClassMap SizeClassMap;
-#elif SANITIZER_LINUX && !SANITIZER_ANDROID
+#elif SANITIZER_LINUX && !SANITIZER_ANDROID && !defined(SANITIZER_AARCH64_39BIT_VA)
   static const uptr kSpaceSize = 0x40000000000ULL;  // 4T.
   typedef __sanitizer::DefaultSizeClassMap SizeClassMap;
 #else

``````````

</details>


https://github.com/llvm/llvm-project/pull/170927