[llvm] [Memprof] Fixes memory leak in MemInfoBlock histogram. (PR #96834)

[Snehasish Kumar via llvm-commits]

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@@ -633,6 +633,8 @@ Error RawMemProfReader::symbolizeAndFilterStackFrames(
   // Drop the entries where the callstack is empty.
   for (const uint64_t Id : EntriesToErase) {
     StackMap.erase(Id);
+    if(CallstackProfileData[Id].AccessHistogramSize > 0)
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snehasish wrote:

This seems like a bug which could happen elsewhere too. What do you think about adding a destructor to the MemInfoBlock which releases any allocated memory if the histogram size > 0?

https://github.com/llvm/llvm-project/pull/96834