[compiler-rt] [scudo] Add static vector functionality. (PR #98986)

[via llvm-commits]

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@@ -116,18 +117,19 @@ template <typename T> class VectorNoCtor {
   uptr CapacityBytes = 0;
   uptr Size = 0;
 
-  T LocalData[256 / sizeof(T)] = {};
+  T LocalData[StaticNumEntries] = {};
   MemMapT ExternalBuffer;
 };
 
-template <typename T> class Vector : public VectorNoCtor<T> {
+template <typename T, size_t StaticNumEntries>
+class Vector : public VectorNoCtor<T, Max<size_t>(1, StaticNumEntries)> {
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ChiaHungDuan wrote:

According to cferris@ suggestion, let's static_assert the `StaticNumEntries` is greater than zero. (Then we don't need the Max() and common.h)

https://github.com/llvm/llvm-project/pull/98986