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[hwasan] Android: Switch from TLS_SLOT_TSAN(8) to TLS_SLOT_SANITIZER(6)

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Summary:
The change is needed to support ELF TLS in Android. See D55581 for the
same change in compiler-rt.

Reviewers: srhines, eugenis

Reviewed By: eugenis

Subscribers: srhines, llvm-commits

Differential Revision: https://reviews.llvm.org/D55592

llvm-svn: 348983
This commit is contained in:
Ryan Prichard 2018-12-12 22:45:06 +00:00
parent 7e3dc7d21c
commit fc13f3f80a
2 changed files with 5 additions and 3 deletions
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4
lib/Transforms/Instrumentation/HWAddressSanitizer.cpp
View File

@ -703,10 +703,12 @@ Value *HWAddressSanitizer::untagPointer(IRBuilder<> &IRB, Value *PtrLong) {
Value *HWAddressSanitizer::getHwasanThreadSlotPtr(IRBuilder<> &IRB, Type *Ty) {
Module *M = IRB.GetInsertBlock()->getParent()->getParent();
if (TargetTriple.isAArch64() && TargetTriple.isAndroid()) {
// Android provides a fixed TLS slot for sanitizers. See TLS_SLOT_SANITIZER
// in Bionic's libc/private/bionic_tls.h.
Function *ThreadPointerFunc =
Intrinsic::getDeclaration(M, Intrinsic::thread_pointer);
Value *SlotPtr = IRB.CreatePointerCast(
IRB.CreateConstGEP1_32(IRB.CreateCall(ThreadPointerFunc), 0x40),
IRB.CreateConstGEP1_32(IRB.CreateCall(ThreadPointerFunc), 0x30),
Ty->getPointerTo(0));
return SlotPtr;
}

4
test/Instrumentation/HWAddressSanitizer/prologue.ll
View File

@ -29,7 +29,7 @@ define i32 @test_load(i32* %a) sanitize_hwaddress {
; CHECK-GLOBAL: load i64, i64* @__hwasan_shadow_memory_dynamic_address
; CHECK-TLS: %[[A:[^ ]*]] = call i8* @llvm.thread.pointer()
; CHECK-TLS: %[[B:[^ ]*]] = getelementptr i8, i8* %[[A]], i32 64
; CHECK-TLS: %[[B:[^ ]*]] = getelementptr i8, i8* %[[A]], i32 48
; CHECK-TLS: %[[C:[^ ]*]] = bitcast i8* %[[B]] to i64*
; CHECK-TLS: %[[D:[^ ]*]] = load i64, i64* %[[C]]
; CHECK-TLS: %[[E:[^ ]*]] = or i64 %[[D]], 4294967295
@ -60,7 +60,7 @@ define void @test_alloca() sanitize_hwaddress {
; CHECK-GLOBAL: load i64, i64* @__hwasan_shadow_memory_dynamic_address
; CHECK-TLS: %[[A:[^ ]*]] = call i8* @llvm.thread.pointer()
; CHECK-TLS: %[[B:[^ ]*]] = getelementptr i8, i8* %[[A]], i32 64
; CHECK-TLS: %[[B:[^ ]*]] = getelementptr i8, i8* %[[A]], i32 48
; CHECK-TLS: %[[C:[^ ]*]] = bitcast i8* %[[B]] to i64*
; CHECK-TLS: %[[D:[^ ]*]] = load i64, i64* %[[C]]