[scudo] Rename AllocatorRingBuffer into scudo:ring_buffer

[fabio-d]

Summary

To maintain the convention of Scudo names starting with "scudo:",
which is used by some tooling to categorize memory usage.

[Chia-hungDuan]

Add @fmayer to be aware of the name change

[fmayer]

In D157102#4560976, @Chia-hungDuan wrote:

Add @fmayer to be aware of the name change

I have no concrete concerns about this, but I can definitely imagine something (if only some random scripts) downstream breaking.

[Chia-hungDuan]

In D157102#4607595, @fmayer wrote:

In D157102#4560976, @Chia-hungDuan wrote:

Add @fmayer to be aware of the name change

I have no concrete concerns about this, but I can definitely imagine something (if only some random scripts) downstream breaking.

Thanks for sharing your thought. I don't have strong opinion on this either. It's fine to do it.

compiler-rt/lib/scudo/standalone/combined.h

void mapAndInitializeRingBuffer() {
     u32 AllocationRingBufferSize =
         static_cast<u32>(getFlags()->allocation_ring_buffer_size);
     if (AllocationRingBufferSize < 1)
       return;
     RawRingBuffer = static_cast<char *>(
         map(/*Addr=*/nullptr,
             roundUp(ringBufferSizeInBytes(AllocationRingBufferSize),
                     getPageSizeCached()),
-            "AllocatorRingBuffer"));
+            "scudo:ring_buffer"));
     auto *RingBuffer = reinterpret_cast<AllocationRingBuffer *>(RawRingBuffer);
     RingBuffer->Size = AllocationRingBufferSize;
     static_assert(sizeof(AllocationRingBuffer) %
                           alignof(typename AllocationRingBuffer::Entry) ==
                       0,
                   "invalid alignment");
   }