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[sanitizer] Add MSan support for AArch64

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This patch adds support for msan on aarch64-linux for both 39 and
42-bit VMA.  The support is enabled by defining the
SANITIZER_AARCH64_VMA compiler flag to either 39 or 42 at build time
for both clang/llvm and compiler-rt.  The default VMA is 39 bits.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@247807 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Adhemerval Zanella 2015-09-16 15:10:27 +00:00
parent e91a80e5b8
commit 5f57416779
1 changed files with 34 additions and 0 deletions
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34
lib/Transforms/Instrumentation/MemorySanitizer.cpp
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@ -120,6 +120,16 @@ using namespace llvm;
#define DEBUG_TYPE "msan"
// 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 unsigned kOriginSize = 4;
static const unsigned kMinOriginAlignment = 4;
static const unsigned kShadowTLSAlignment = 8;
@ -244,6 +254,21 @@ static const MemoryMapParams Linux_PowerPC64_MemoryMapParams = {
0x1C0000000000, // OriginBase
};
// aarch64 Linux
static const MemoryMapParams Linux_AArch64_MemoryMapParams = {
#if SANITIZER_AARCH64_VMA == 39
0x007C00000000, // AndMask
0x000100000000, // XorMask
0x004000000000, // ShadowBase
0x004300000000, // OriginBase
#elif SANITIZER_AARCH64_VMA == 42
0x03E000000000, // AndMask
0x001000000000, // XorMask
0x010000000000, // ShadowBase
0x012000000000, // OriginBase
#endif
};
// i386 FreeBSD
static const MemoryMapParams FreeBSD_I386_MemoryMapParams = {
0x000180000000, // AndMask
@ -275,6 +300,11 @@ static const PlatformMemoryMapParams Linux_PowerPC_MemoryMapParams = {
&Linux_PowerPC64_MemoryMapParams,
};
static const PlatformMemoryMapParams Linux_ARM_MemoryMapParams = {
NULL,
&Linux_AArch64_MemoryMapParams,
};
static const PlatformMemoryMapParams FreeBSD_X86_MemoryMapParams = {
&FreeBSD_I386_MemoryMapParams,
&FreeBSD_X86_64_MemoryMapParams,
@ -496,6 +526,10 @@ bool MemorySanitizer::doInitialization(Module &M) {
case Triple::ppc64le:
MapParams = Linux_PowerPC_MemoryMapParams.bits64;
break;
case Triple::aarch64:
case Triple::aarch64_be:
MapParams = Linux_ARM_MemoryMapParams.bits64;
break;
default:
report_fatal_error("unsupported architecture");
}