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

[Florian Mayer via llvm-commits]

================
@@ -1501,6 +1503,11 @@ class Allocator {
                 getPageSizeCached()),
         "scudo:ring_buffer");
     RawRingBuffer = reinterpret_cast<char *>(MemMap.getBase());
+    if (RawRingBuffer == nullptr) {
+      Printf("Failed to allocate allocation ring buffer of size %d",
+             getFlags()->allocation_ring_buffer_size);
+      return;
----------------
fmayer wrote:

That's also possible. The main thing I was thinking of `ENOMEM`.

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