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[asan] Enable 48-bit VMA support on aarch64 

This patch adds 48-bits VMA support for asan on aarch64. The current
47-bit mask is not suffice since on aarch64 kernel with 48-bit vma
(default on ubuntu 16.04) the process may use full VMA range as:

[...]
ffffa39a7000-ffffa39a8000 r--p 00000000 00:00 0 [vvar]
ffffa39a8000-ffffa39a9000 r-xp 00000000 00:00 0 [vdso]
ffffa39a9000-ffffa39aa000 r--p 0001c000 08:02 13631554 /lib/aarch64-linux-gnu/ld-2.23.so
ffffa39aa000-ffffa39ac000 rw-p 0001d000 08:02 13631554 /lib/aarch64-linux-gnu/ld-2.23.so
ffffc2227000-ffffc2248000 rw-p 00000000 00:00 0 [stack]

llvm-svn: 275792
This commit is contained in:
Adhemerval Zanella 2016-07-18 14:47:18 +00:00
parent 5ab9732aef
commit ab1b926bb9
1 changed files with 2 additions and 0 deletions
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2
compiler-rt/lib/sanitizer_common/sanitizer_platform.h
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@ -180,6 +180,8 @@
// will still work but will consume more memory for TwoLevelByteMap.
#if defined(__mips__)
# define SANITIZER_MMAP_RANGE_SIZE FIRST_32_SECOND_64(1ULL << 32, 1ULL << 40)
#elif defined(__aarch64__)
# define SANITIZER_MMAP_RANGE_SIZE FIRST_32_SECOND_64(1ULL << 32, 1ULL << 48)
#else
# define SANITIZER_MMAP_RANGE_SIZE FIRST_32_SECOND_64(1ULL << 32, 1ULL << 47)
#endif