[llvm] [openmp] [Offload] Implement double free (and other allocation error) reporting (PR #100261)

[Johannes Doerfert via llvm-commits]

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@@ -1345,6 +1367,35 @@ Error GenericDeviceTy::dataDelete(void *TgtPtr, TargetAllocTy Kind) {
   if (Plugin.getRecordReplay().isRecordingOrReplaying())
     return Plugin::success();
 
+  // Keep track of the deallocation stack if we track allocation traces.
+  if (OMPX_TrackAllocationTraces) {
+    AllocationTraceInfoTy *ATI = nullptr;
+    {
+      auto AllocationTraceMap = AllocationTraces.getExclusiveAccessor();
+      ATI = (*AllocationTraceMap)[TgtPtr];
+    }
+
+    std::string StackTrace;
+    llvm::raw_string_ostream OS(StackTrace);
+    llvm::sys::PrintStackTrace(OS);
+
+    if (!ATI)
+      ErrorReporter::reportDeallocationOfNonAllocatedPtr(TgtPtr, Kind, ATI,
+                                                         StackTrace);
+
+    if (!ATI->DeallocationTrace.empty())
+      ErrorReporter::reportDeallocationOfDeallocatedPtr(TgtPtr, Kind, ATI,
+                                                        StackTrace);
+
+    if (ATI->Kind != Kind)
+      ErrorReporter::reportDeallocationOfWrongPtrKind(TgtPtr, Kind, ATI,
+                                                      StackTrace);
+
+    ATI->DeallocationTrace = StackTrace;
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jdoerfert wrote:

Yes, that's possible. I can guard against that I guess. 

https://github.com/llvm/llvm-project/pull/100261