[compiler-rt] [scudo] Handle failed mmap for allocation ring buffer (PR #71817)

[via llvm-commits]

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@@ -1281,7 +1281,8 @@ class Allocator {
 
   void storeSecondaryAllocationStackMaybe(const Options &Options, void *Ptr,
                                           uptr Size) {
-    if (!UNLIKELY(Options.get(OptionBit::TrackAllocationStacks)))
+    if (!UNLIKELY(Options.get(OptionBit::TrackAllocationStacks)) ||
+        RawRingBuffer == nullptr)
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ChiaHungDuan wrote:

Can we use `RawRingBuffer` as a switch here? Or do we have the scenario that we may want to turn on/off the stack storing randomly?

https://github.com/llvm/llvm-project/pull/71817