Comment #16 on issue 246 by [email protected]: Porting to a new target
(AArch64)
https://code.google.com/p/address-sanitizer/issues/detail?id=246
FYI, following patch makes ASAN work fine on 42-bit AS, but will break the
39-bit AS and won't fix 48-bit one. So we really need something more
dynamic.
--- libsanitizer/asan/asan_allocator.h (revision 219833)
+++ libsanitizer/asan/asan_allocator.h (working copy)
@@ -100,6 +100,10 @@
# if defined(__powerpc64__)
const uptr kAllocatorSpace = 0xa0000000000ULL;
const uptr kAllocatorSize = 0x20000000000ULL; // 2T.
+# elif defined(__aarch64__)
+// Valid only for 42-bit VA
+const uptr kAllocatorSpace = 0x10000000000ULL;
+const uptr kAllocatorSize = 0x10000000000ULL; // 1T.
# else
const uptr kAllocatorSpace = 0x600000000000ULL;
const uptr kAllocatorSize = 0x40000000000ULL; // 4T.
--- libsanitizer/sanitizer_common/sanitizer_platform.h (revision 219833)
+++ libsanitizer/sanitizer_common/sanitizer_platform.h (working copy)
@@ -79,7 +79,7 @@
// For such platforms build this code with
-DSANITIZER_CAN_USE_ALLOCATOR64=0 or
// change the definition of SANITIZER_CAN_USE_ALLOCATOR64 here.
#ifndef SANITIZER_CAN_USE_ALLOCATOR64
-# if defined(__aarch64__) || defined(__mips64)
+# if defined(__mips64)
# define SANITIZER_CAN_USE_ALLOCATOR64 0
# else
# define SANITIZER_CAN_USE_ALLOCATOR64 (SANITIZER_WORDSIZE == 64)
@@ -88,10 +88,10 @@
// The range of addresses which can be returned my mmap.
// FIXME: this value should be different on different platforms,
-// e.g. on AArch64 it is most likely (1ULL << 39). Larger values will
still work
+// e.g. on AArch64 it is most likely (1ULL << 42). Larger values will
still work
// but will consume more memory for TwoLevelByteMap.
#if defined(__aarch64__)
-# define SANITIZER_MMAP_RANGE_SIZE FIRST_32_SECOND_64(1ULL << 32, 1ULL <<
39)
+# define SANITIZER_MMAP_RANGE_SIZE FIRST_32_SECOND_64(1ULL << 32, 1ULL <<
42)
#else
# define SANITIZER_MMAP_RANGE_SIZE FIRST_32_SECOND_64(1ULL << 32, 1ULL <<
47)
#endif
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