From 6c318f59b1389826c9d70112e8fbec9973772f9e Mon Sep 17 00:00:00 2001
From: Ismail Pazarbasi <ismail.pazarbasi@gmail.com>
Date: Sun, 10 May 2015 13:45:05 +0000
Subject: [PATCH] SanitizerCoverage: Use `createSanitizerCtor` to create ctor
 and call init

Second attempt; instead of using a named local variable, passing
arguments directly to `createSanitizerCtorAndInitFunctions` worked
on Windows.

Reviewers: kcc, samsonov

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D8780

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@236951 91177308-0d34-0410-b5e6-96231b3b80d8
---
 .../Instrumentation/SanitizerCoverage.cpp     | 33 ++++++++-----------
 1 file changed, 13 insertions(+), 20 deletions(-)

diff --git a/lib/Transforms/Instrumentation/SanitizerCoverage.cpp b/lib/Transforms/Instrumentation/SanitizerCoverage.cpp
index 8690dbf9b67..b4c722f32d3 100644
--- a/lib/Transforms/Instrumentation/SanitizerCoverage.cpp
+++ b/lib/Transforms/Instrumentation/SanitizerCoverage.cpp
@@ -156,7 +156,6 @@ class SanitizerCoverageModule : public ModulePass {
   Function *SanCovFunction;
   Function *SanCovWithCheckFunction;
   Function *SanCovIndirCallFunction;
-  Function *SanCovModuleInit;
   Function *SanCovTraceEnter, *SanCovTraceBB;
   Function *SanCovTraceCmpFunction;
   InlineAsm *EmptyAsm;
@@ -184,12 +183,6 @@ bool SanitizerCoverageModule::runOnModule(Module &M) {
   Type *Int32PtrTy = PointerType::getUnqual(IRB.getInt32Ty());
   Int64Ty = IRB.getInt64Ty();
 
-  Function *CtorFunc =
-      Function::Create(FunctionType::get(VoidTy, false),
-                       GlobalValue::InternalLinkage, kSanCovModuleCtorName, &M);
-  ReturnInst::Create(*C, BasicBlock::Create(*C, "", CtorFunc));
-  appendToGlobalCtors(M, CtorFunc, kSanCtorAndDtorPriority);
-
   SanCovFunction = checkSanitizerInterfaceFunction(
       M.getOrInsertFunction(kSanCovName, VoidTy, Int32PtrTy, nullptr));
   SanCovWithCheckFunction = checkSanitizerInterfaceFunction(
@@ -201,10 +194,6 @@ bool SanitizerCoverageModule::runOnModule(Module &M) {
       checkSanitizerInterfaceFunction(M.getOrInsertFunction(
           kSanCovTraceCmp, VoidTy, Int64Ty, Int64Ty, Int64Ty, nullptr));
 
-  SanCovModuleInit = checkSanitizerInterfaceFunction(M.getOrInsertFunction(
-      kSanCovModuleInitName, VoidTy, Int32PtrTy, IntptrTy,
-      Int8PtrTy, Int8PtrTy, nullptr));
-  SanCovModuleInit->setLinkage(Function::ExternalLinkage);
   // We insert an empty inline asm after cov callbacks to avoid callback merge.
   EmptyAsm = InlineAsm::get(FunctionType::get(IRB.getVoidTy(), false),
                             StringRef(""), StringRef(""),
@@ -270,15 +259,19 @@ bool SanitizerCoverageModule::runOnModule(Module &M) {
       new GlobalVariable(M, ModNameStrConst->getType(), true,
                          GlobalValue::PrivateLinkage, ModNameStrConst);
 
-  // Call __sanitizer_cov_module_init
-  IRB.SetInsertPoint(CtorFunc->getEntryBlock().getTerminator());
-  IRB.CreateCall4(
-      SanCovModuleInit, IRB.CreatePointerCast(RealGuardArray, Int32PtrTy),
-      ConstantInt::get(IntptrTy, N),
-      Options.Use8bitCounters
-          ? IRB.CreatePointerCast(RealEightBitCounterArray, Int8PtrTy)
-          : Constant::getNullValue(Int8PtrTy),
-      IRB.CreatePointerCast(ModuleName, Int8PtrTy));
+  Function *CtorFunc;
+  std::tie(CtorFunc, std::ignore) = createSanitizerCtorAndInitFunctions(
+      M, kSanCovModuleCtorName, kSanCovModuleInitName,
+      {Int32PtrTy, IntptrTy, Int8PtrTy, Int8PtrTy},
+      {IRB.CreatePointerCast(RealGuardArray, Int32PtrTy),
+       ConstantInt::get(IntptrTy, N),
+       Options.Use8bitCounters
+           ? IRB.CreatePointerCast(RealEightBitCounterArray, Int8PtrTy)
+           : Constant::getNullValue(Int8PtrTy),
+       IRB.CreatePointerCast(ModuleName, Int8PtrTy)});
+
+  appendToGlobalCtors(M, CtorFunc, kSanCtorAndDtorPriority);
+
   return true;
 }