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ASan: Use createSanitizerCtor to create ctor, and call __asan_init

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Reviewers: kcc, samsonov

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D8778

llvm-svn: 236777
This commit is contained in:
Ismail Pazarbasi 2015-05-07 21:40:46 +00:00
parent 3b3ecc12b2
commit 9c4083a84a
2 changed files with 8 additions and 10 deletions
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14
lib/Transforms/Instrumentation/AddressSanitizer.cpp
View File

@ -1452,16 +1452,10 @@ bool AddressSanitizer::doInitialization(Module &M) {
IntptrTy = Type::getIntNTy(*C, LongSize);
TargetTriple = Triple(M.getTargetTriple());
AsanCtorFunction =
Function::Create(FunctionType::get(Type::getVoidTy(*C), false),
GlobalValue::InternalLinkage, kAsanModuleCtorName, &M);
BasicBlock *AsanCtorBB = BasicBlock::Create(*C, "", AsanCtorFunction);
// call __asan_init in the module ctor.
IRBuilder<> IRB(ReturnInst::Create(*C, AsanCtorBB));
AsanInitFunction = checkSanitizerInterfaceFunction(
M.getOrInsertFunction(kAsanInitName, IRB.getVoidTy(), nullptr));
AsanInitFunction->setLinkage(Function::ExternalLinkage);
IRB.CreateCall(AsanInitFunction);
std::tie(AsanCtorFunction, AsanInitFunction) =
createSanitizerCtorAndInitFunctions(M, kAsanModuleCtorName, kAsanInitName,
/*InitArgTypes=*/{},
/*InitArgs=*/{});
Mapping = getShadowMapping(TargetTriple, LongSize);

4
test/Instrumentation/AddressSanitizer/basic.ll
View File

@ -4,6 +4,7 @@
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
target triple = "x86_64-unknown-linux-gnu"
; CHECK: @llvm.global_ctors = {{.*}}@asan.module_ctor
define i32 @test_load(i32* %a) sanitize_address {
; CHECK-LABEL: @test_load
@ -169,5 +170,8 @@ define void @memintr_test(i8* %a, i8* %b) nounwind uwtable sanitize_address {
; CHECK: __asan_memcpy
; CHECK: ret void
; CHECK: define internal void @asan.module_ctor()
; CHECK: call void @__asan_init_v5()
; PROF
; CHECK: ![[PROF]] = !{!"branch_weights", i32 1, i32 100000}