Auto-generate files after cl/647802280

php/ext/google/protobuf/php-upb.c

@@ -4719,6 +4719,10 @@ upb_alloc upb_alloc_global = {&upb_global_allocfunc};
 
 // Must be last.
 
+static UPB_ATOMIC(size_t) max_block_size = 32 << 10;
+
+void upb_Arena_SetMaxBlockSize(size_t max) { max_block_size = max; }
+
 typedef struct upb_MemBlock {
   // Atomic only for the benefit of SpaceAllocated().
   UPB_ATOMIC(struct upb_MemBlock*) next;
@@ -4956,7 +4960,14 @@ static bool _upb_Arena_AllocBlock(upb_Arena* a, size_t size) {
   if (!ai->block_alloc) return false;
   upb_MemBlock* last_block = upb_Atomic_Load(&ai->blocks, memory_order_acquire);
   size_t last_size = last_block != NULL ? last_block->size : 128;
-  size_t block_size = UPB_MAX(size, last_size * 2) + kUpb_MemblockReserve;
+
+  // Don't naturally grow beyond the max block size.
+  size_t clamped_size = UPB_MIN(last_size * 2, max_block_size);
+
+  // We may need to exceed the max block size if the user requested a large
+  // allocation.
+  size_t block_size = UPB_MAX(size, clamped_size) + kUpb_MemblockReserve;
+
   upb_MemBlock* block =
       upb_malloc(_upb_ArenaInternal_BlockAlloc(ai), block_size);
 

php/ext/google/protobuf/php-upb.h

@@ -763,6 +763,15 @@ UPB_API_INLINE void* upb_Arena_Malloc(struct upb_Arena* a, size_t size);
 UPB_API_INLINE void* upb_Arena_Realloc(upb_Arena* a, void* ptr, size_t oldsize,
                                        size_t size);
 
+// Sets the maximum block size for all arenas. This is a global configuration
+// setting that will affect all existing and future arenas. If
+// upb_Arena_Malloc() is called with a size larger than this, we will exceed
+// this size and allocate a larger block.
+//
+// This API is meant for experimentation only. It will likely be removed in
+// the future.
+void upb_Arena_SetMaxBlockSize(size_t max);
+
 // Shrinks the last alloc from arena.
 // REQUIRES: (ptr, oldsize) was the last malloc/realloc from this arena.
 // We could also add a upb_Arena_TryShrinkLast() which is simply a no-op if

ruby/ext/google/protobuf_c/ruby-upb.c

@@ -4207,6 +4207,10 @@ upb_alloc upb_alloc_global = {&upb_global_allocfunc};
 
 // Must be last.
 
+static UPB_ATOMIC(size_t) max_block_size = 32 << 10;
+
+void upb_Arena_SetMaxBlockSize(size_t max) { max_block_size = max; }
+
 typedef struct upb_MemBlock {
   // Atomic only for the benefit of SpaceAllocated().
   UPB_ATOMIC(struct upb_MemBlock*) next;
@@ -4444,7 +4448,14 @@ static bool _upb_Arena_AllocBlock(upb_Arena* a, size_t size) {
   if (!ai->block_alloc) return false;
   upb_MemBlock* last_block = upb_Atomic_Load(&ai->blocks, memory_order_acquire);
   size_t last_size = last_block != NULL ? last_block->size : 128;
-  size_t block_size = UPB_MAX(size, last_size * 2) + kUpb_MemblockReserve;
+
+  // Don't naturally grow beyond the max block size.
+  size_t clamped_size = UPB_MIN(last_size * 2, max_block_size);
+
+  // We may need to exceed the max block size if the user requested a large
+  // allocation.
+  size_t block_size = UPB_MAX(size, clamped_size) + kUpb_MemblockReserve;
+
   upb_MemBlock* block =
       upb_malloc(_upb_ArenaInternal_BlockAlloc(ai), block_size);
 

ruby/ext/google/protobuf_c/ruby-upb.h

@@ -765,6 +765,15 @@ UPB_API_INLINE void* upb_Arena_Malloc(struct upb_Arena* a, size_t size);
 UPB_API_INLINE void* upb_Arena_Realloc(upb_Arena* a, void* ptr, size_t oldsize,
                                        size_t size);
 
+// Sets the maximum block size for all arenas. This is a global configuration
+// setting that will affect all existing and future arenas. If
+// upb_Arena_Malloc() is called with a size larger than this, we will exceed
+// this size and allocate a larger block.
+//
+// This API is meant for experimentation only. It will likely be removed in
+// the future.
+void upb_Arena_SetMaxBlockSize(size_t max);
+
 // Shrinks the last alloc from arena.
 // REQUIRES: (ptr, oldsize) was the last malloc/realloc from this arena.
 // We could also add a upb_Arena_TryShrinkLast() which is simply a no-op if