[PATCH] D119498: [hwasan] keep debug intrinsicts in AllocaInfo.

[Florian Mayer via Phabricator via llvm-commits]

fmayer updated this revision to Diff 407721.
fmayer added a comment.

check for interesting alloca


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D119498/new/

https://reviews.llvm.org/D119498

Files:
  llvm/include/llvm/Transforms/Utils/MemoryTaggingSupport.h
  llvm/lib/Transforms/Instrumentation/HWAddressSanitizer.cpp
  llvm/lib/Transforms/Utils/MemoryTaggingSupport.cpp


Index: llvm/lib/Transforms/Utils/MemoryTaggingSupport.cpp
===================================================================
--- llvm/lib/Transforms/Utils/MemoryTaggingSupport.cpp
+++ llvm/lib/Transforms/Utils/MemoryTaggingSupport.cpp
@@ -87,10 +87,13 @@
   }
   if (auto *DVI = dyn_cast<DbgVariableIntrinsic>(&Inst)) {
     for (Value *V : DVI->location_ops()) {
-      if (auto *Alloca = dyn_cast_or_null<AllocaInst>(V))
-        if (!Info.AllocaDbgMap.count(Alloca) ||
-            Info.AllocaDbgMap[Alloca].back() != DVI)
-          Info.AllocaDbgMap[Alloca].push_back(DVI);
+      if (auto *Alloca = dyn_cast_or_null<AllocaInst>(V)) {
+        AllocaInfo &AI = Info.AllocasToInstrument[Alloca];
+        auto &DVIVec = AI.DbgVariableIntrinsics;
+        if (IsInterestingAlloca(*Alloca) &&
+            (DVIVec.empty() || DVIVec.back() != DVI))
+          DVIVec.push_back(DVI);
+      }
     }
   }
   Instruction *ExitUntag = getUntagLocationIfFunctionExit(Inst);
Index: llvm/lib/Transforms/Instrumentation/HWAddressSanitizer.cpp
===================================================================
--- llvm/lib/Transforms/Instrumentation/HWAddressSanitizer.cpp
+++ llvm/lib/Transforms/Instrumentation/HWAddressSanitizer.cpp
@@ -1341,7 +1341,7 @@
     AI->replaceUsesWithIf(Replacement,
                           [AILong](Use &U) { return U.getUser() != AILong; });
 
-    for (auto *DDI : SInfo.AllocaDbgMap.lookup(AI)) {
+    for (auto *DDI : Info.DbgVariableIntrinsics) {
       // Prepend "tag_offset, N" to the dwarf expression.
       // Tag offset logically applies to the alloca pointer, and it makes sense
       // to put it at the beginning of the expression.
Index: llvm/include/llvm/Transforms/Utils/MemoryTaggingSupport.h
===================================================================
--- llvm/include/llvm/Transforms/Utils/MemoryTaggingSupport.h
+++ llvm/include/llvm/Transforms/Utils/MemoryTaggingSupport.h
@@ -76,12 +76,12 @@
   AllocaInst *AI;
   SmallVector<IntrinsicInst *, 2> LifetimeStart;
   SmallVector<IntrinsicInst *, 2> LifetimeEnd;
+  SmallVector<DbgVariableIntrinsic *, 2> DbgVariableIntrinsics;
 };
 
 struct StackInfo {
   MapVector<AllocaInst *, AllocaInfo> AllocasToInstrument;
   SmallVector<Instruction *, 4> UnrecognizedLifetimes;
-  DenseMap<AllocaInst *, std::vector<DbgVariableIntrinsic *>> AllocaDbgMap;
   SmallVector<Instruction *, 8> RetVec;
   bool CallsReturnTwice = false;
 };


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