[compiler-rt] [scudo] Only init RingBuffer when needed. (PR #85994)

[Christopher Ferris via llvm-commits]

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@@ -867,29 +867,83 @@ SCUDO_TYPED_TEST(ScudoCombinedTest, ReallocateInPlaceStress) {
   }
 }
 
+SCUDO_TYPED_TEST(ScudoCombinedTest, RingBufferDefaultDisabled) {
+  // The RingBuffer is not initialized until tracking is enabled for the
+  // first time.
+  auto *Allocator = this->Allocator.get();
+  ASSERT_EQ(0u, Allocator->getRingBufferSize());
+  ASSERT_EQ(nullptr, Allocator->getRingBufferAddress());
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cferris1000 wrote:

Done.

https://github.com/llvm/llvm-project/pull/85994