Respect the Web limitation on Table size (#6567)

Without this the fuzzer can error on differences in behavior between V8 and us.

Also move the limitations constants to their own header.

1 files changed, 36 insertions, 0 deletions

diff --git a/src/wasm-limits.h b/src/wasm-limits.h
new file mode 100644
index 000000000..0e1863fba
--- /dev/null
+++ b/src/wasm-limits.h
@@ -0,0 +1,36 @@
+/*
+ * Copyright 2024 WebAssembly Community Group participants
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef wasm_wasm_limits_h
+#define wasm_wasm_limits_h
+
+#include <stdint.h>
+
+namespace wasm {
+
+// wasm VMs on the web have decided to impose some limits on what they
+// accept (see e.g. https://github.com/v8/v8/blob/main/src/wasm/wasm-limits.h).
+enum WebLimitations : uint32_t {
+  MaxDataSegments = 100 * 1000,
+  MaxTableSize = 10 * 1000 * 1000,
+  MaxFunctionBodySize = 128 * 1024,
+  MaxFunctionLocals = 50 * 1000,
+  MaxFunctionParams = 1000
+};
+
+} // namespace wasm
+
+#endif // wasm_wasm_limits_h