[compiler-rt] [scudo] limit VMA size for riscv64 for DefaultConfig (PR #76013)

[Icenowy Zheng via llvm-commits]

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@@ -124,8 +124,14 @@ struct DefaultConfig {
   struct Primary {
     using SizeClassMap = DefaultSizeClassMap;
 #if SCUDO_CAN_USE_PRIMARY64
+#if SCUDO_RISCV64
+    // Support 39-bit VMA for riscv-64
+    static const uptr RegionSizeLog = 30U;
+    static const uptr GroupSizeLog = 19U;
+#else
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Icenowy wrote:

This is for running everything with Scudo. I found this problem when building Telegram Desktop on RISC-V, which switched to Scudo from Jemalloc some times ago.

https://github.com/llvm/llvm-project/pull/76013