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[compiler-rt] [asan] Use same shadow offset for aarch64 

This patch makes ASAN for aarch64 use the same shadow offset for all
currently supported VMAs (39 and 42 bits).  The shadow offset is the
same for 39-bit (36).

llvm-svn: 252497
This commit is contained in:
Adhemerval Zanella 2015-11-09 18:05:24 +00:00
parent e8607ef204
commit 18b2258c92
4 changed files with 7 additions and 18 deletions
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4
compiler-rt/lib/asan/asan_mapping.h
View File

@ -118,11 +118,7 @@ static const u64 kIosShadowOffset32 = 1ULL << 30; // 0x40000000
static const u64 kIosShadowOffset64 = 0x130000000;
static const u64 kIosSimShadowOffset32 = 1ULL << 30;
static const u64 kIosSimShadowOffset64 = kDefaultShadowOffset64;
#if SANITIZER_AARCH64_VMA == 39
static const u64 kAArch64_ShadowOffset64 = 1ULL << 36;
#elif SANITIZER_AARCH64_VMA == 42
static const u64 kAArch64_ShadowOffset64 = 1ULL << 39;
#endif
static const u64 kMIPS32_ShadowOffset32 = 0x0aaa0000;
static const u64 kMIPS64_ShadowOffset64 = 1ULL << 37;
static const u64 kPPC64_ShadowOffset64 = 1ULL << 41;

2
compiler-rt/lib/asan/asan_rtl.cc
View File

@ -378,8 +378,6 @@ static void AsanInitInternal() {
// initialization steps look at flags().
InitializeFlags();
CheckVMASize();
AsanCheckIncompatibleRT();
AsanCheckDynamicRTPrereqs();

4
compiler-rt/lib/lsan/lsan_common.cc
View File

@ -120,7 +120,9 @@ static inline bool CanBeAHeapPointer(uptr p) {
#elif defined(__mips64)
return ((p >> 40) == 0);
#elif defined(__aarch64__)
return ((p >> SANITIZER_AARCH64_VMA) == 0);
unsigned runtimeVMA =
(MostSignificantSetBitIndex(GET_CURRENT_FRAME()) + 1);
return ((p >> runtimeVMA) == 0);
#else
return true;
#endif

15
compiler-rt/lib/sanitizer_common/sanitizer_platform.h
View File

@ -97,7 +97,7 @@
// 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(__mips64) || (defined(__aarch64__) && SANITIZER_AARCH64_VMA == 39)
# if defined(__mips64) || defined(__aarch64__)
# define SANITIZER_CAN_USE_ALLOCATOR64 0
# else
# define SANITIZER_CAN_USE_ALLOCATOR64 (SANITIZER_WORDSIZE == 64)
@ -105,16 +105,9 @@
#endif
// 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
// but will consume more memory for TwoLevelByteMap.
#if defined(__aarch64__)
# if SANITIZER_AARCH64_VMA == 39
# define SANITIZER_MMAP_RANGE_SIZE FIRST_32_SECOND_64(1ULL << 32, 1ULL << 39)
# elif SANITIZER_AARCH64_VMA == 42
# define SANITIZER_MMAP_RANGE_SIZE FIRST_32_SECOND_64(1ULL << 32, 1ULL << 42)
# endif
#elif defined(__mips__)
// FIXME: this value should be different on different platforms. Larger values
// 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)
#else
# define SANITIZER_MMAP_RANGE_SIZE FIRST_32_SECOND_64(1ULL << 32, 1ULL << 47)