[asan] Add config for AArch64 Linux with 39-bit VA.

[efriedma-quic]

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 58c8f57.)

[llvmbot]

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

Author: Eli Friedman (efriedma-quic)

Changes

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 58c8f57.)

---

Full diff: https://github.com/llvm/llvm-project/pull/170929.diff

1 Files Affected:

• (modified) compiler-rt/lib/asan/asan_allocator.h (+1-1)

diff --git a/compiler-rt/lib/asan/asan_allocator.h b/compiler-rt/lib/asan/asan_allocator.h
index fdf456473fb02..e2ec877696c0a 100644
--- a/compiler-rt/lib/asan/asan_allocator.h
+++ b/compiler-rt/lib/asan/asan_allocator.h
@@ -200,7 +200,7 @@ const uptr kAllocatorSpace = ~(uptr)0;
 #    if defined(__powerpc64__)
 const uptr kAllocatorSize  =  0x20000000000ULL;  // 2T.
 typedef DefaultSizeClassMap SizeClassMap;
-#    elif defined(__aarch64__) && SANITIZER_ANDROID
+#    elif defined(__aarch64__) && (SANITIZER_ANDROID || defined(SANITIZER_AARCH64_39BIT_VA))
 // Android needs to support 39, 42 and 48 bit VMA.
 const uptr kAllocatorSize  =  0x2000000000ULL;  // 128G.
 typedef VeryCompactSizeClassMap SizeClassMap;

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