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[asan] Add ASAN support for AArch64 42-bit VMA 

This patch adds support for asan on aarch64-linux with 42-bit VMA
(current default config for 64K pagesize kernels).  The support is
enabled by defining the SANITIZER_AARCH64_VMA to 42 at build time
for both clang/llvm and compiler-rt.  The default VMA is 39 bits.

llvm-svn: 245594
This commit is contained in:
Adhemerval Zanella 2015-08-20 18:30:40 +00:00
parent 120de4be96
commit e00b497242
1 changed files with 14 additions and 0 deletions
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14
llvm/lib/Transforms/Instrumentation/AddressSanitizer.cpp
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@ -63,6 +63,16 @@ using namespace llvm;
#define DEBUG_TYPE "asan"
// VMA size definition for architecture that support multiple sizes.
// AArch64 has 3 VMA sizes: 39, 42 and 48.
#ifndef SANITIZER_AARCH64_VMA
# define SANITIZER_AARCH64_VMA 39
#else
# if SANITIZER_AARCH64_VMA != 39 && SANITIZER_AARCH64_VMA != 42
# error "invalid SANITIZER_AARCH64_VMA size"
# endif
#endif
static const uint64_t kDefaultShadowScale = 3;
static const uint64_t kDefaultShadowOffset32 = 1ULL << 29;
static const uint64_t kIOSShadowOffset32 = 1ULL << 30;
@ -72,7 +82,11 @@ static const uint64_t kLinuxKasan_ShadowOffset64 = 0xdffffc0000000000;
static const uint64_t kPPC64_ShadowOffset64 = 1ULL << 41;
static const uint64_t kMIPS32_ShadowOffset32 = 0x0aaa0000;
static const uint64_t kMIPS64_ShadowOffset64 = 1ULL << 37;
#if SANITIZER_AARCH64_VMA == 39
static const uint64_t kAArch64_ShadowOffset64 = 1ULL << 36;
#elif SANITIZER_AARCH64_VMA == 42
static const uint64_t kAArch64_ShadowOffset64 = 1ULL << 39;
#endif
static const uint64_t kFreeBSD_ShadowOffset32 = 1ULL << 30;
static const uint64_t kFreeBSD_ShadowOffset64 = 1ULL << 46;
static const uint64_t kWindowsShadowOffset32 = 3ULL << 28;