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Merge llvm commits for kernel address and memory sanitizer support

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Merge commit 99eca1bd9c7a from llvm git (by Mark Johnston):

  [Driver] Enable kernel address and memory sanitizers on FreeBSD

  Test Plan: using kernel ASAN and MSAN implementations in FreeBSD

  Reviewed By: emaste, dim, arichardson

  Differential Revision: https://reviews.llvm.org/D98286

Merge commit f511dc75e4c1 from llvm git (by Mark Johnston):

  [asan] Add an offset for the kernel address sanitizer on FreeBSD

  This is based on a port of the sanitizer runtime to the FreeBSD kernel
  that has been commited as https://cgit.freebsd.org/src/commit/?id=38da497a4dfcf1979c8c2b0e9f3fa0564035c147
  and the following commits.

  Reviewed By: emaste, dim
  Differential Revision: https://reviews.llvm.org/D98285

Requested by:	markj
MFC after:	3 days
This commit is contained in:
Dimitry Andric 2021-04-27 21:18:13 +02:00
parent f17c4e38f5
commit 1b00608b26
2 changed files with 14 additions and 4 deletions
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8
contrib/llvm-project/clang/lib/Driver/ToolChains/FreeBSD.cpp
View File

@ -459,6 +459,7 @@ bool FreeBSD::IsUnwindTablesDefault(const ArgList &Args) const { return true; }
bool FreeBSD::isPIEDefault() const { return getSanitizerArgs().requiresPIE(); }
SanitizerMask FreeBSD::getSupportedSanitizers() const {
const bool IsAArch64 = getTriple().getArch() == llvm::Triple::aarch64;
const bool IsX86 = getTriple().getArch() == llvm::Triple::x86;
const bool IsX86_64 = getTriple().getArch() == llvm::Triple::x86_64;
const bool IsMIPS64 = getTriple().isMIPS64();
@ -477,8 +478,13 @@ SanitizerMask FreeBSD::getSupportedSanitizers() const {
Res |= SanitizerKind::Fuzzer;
Res |= SanitizerKind::FuzzerNoLink;
}
if (IsX86_64)
if (IsAArch64 || IsX86_64) {
Res |= SanitizerKind::KernelAddress;
Res |= SanitizerKind::KernelMemory;
}
if (IsX86_64) {
Res |= SanitizerKind::Memory;
}
return Res;
}

10
contrib/llvm-project/llvm/lib/Transforms/Instrumentation/AddressSanitizer.cpp
View File

@ -107,6 +107,7 @@ static const uint64_t kMIPS64_ShadowOffset64 = 1ULL << 37;
static const uint64_t kAArch64_ShadowOffset64 = 1ULL << 36;
static const uint64_t kFreeBSD_ShadowOffset32 = 1ULL << 30;
static const uint64_t kFreeBSD_ShadowOffset64 = 1ULL << 46;
static const uint64_t kFreeBSDKasan_ShadowOffset64 = 0xdffff7c000000000;
static const uint64_t kNetBSD_ShadowOffset32 = 1ULL << 30;
static const uint64_t kNetBSD_ShadowOffset64 = 1ULL << 46;
static const uint64_t kNetBSDKasan_ShadowOffset64 = 0xdfff900000000000;
@ -489,9 +490,12 @@ static ShadowMapping getShadowMapping(Triple &TargetTriple, int LongSize,
Mapping.Offset = kPPC64_ShadowOffset64;
else if (IsSystemZ)
Mapping.Offset = kSystemZ_ShadowOffset64;
else if (IsFreeBSD && !IsMIPS64)
Mapping.Offset = kFreeBSD_ShadowOffset64;
else if (IsNetBSD) {
else if (IsFreeBSD && !IsMIPS64) {
if (IsKasan)
Mapping.Offset = kFreeBSDKasan_ShadowOffset64;
else
Mapping.Offset = kFreeBSD_ShadowOffset64;
} else if (IsNetBSD) {
if (IsKasan)
Mapping.Offset = kNetBSDKasan_ShadowOffset64;
else