From 8f90b655201e4cd77196a0b90ea4f398ecfe2c56 Mon Sep 17 00:00:00 2001
From: Alon Zakai <alonzakai@gmail.com>
Date: Tue, 9 Jan 2018 21:13:11 -0800
Subject: Do not emit 100k data segments, browsers reject it (#1350)

Instead merge constant-offset segments if we must in order to stay under the limit.

If we can't - too many non-constant-offset segments - then issue a warning.
---
 src/wasm-binary.h | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

(limited to 'src/wasm-binary.h')

diff --git a/src/wasm-binary.h b/src/wasm-binary.h
index a407c56e4..12aecfeaa 100644
--- a/src/wasm-binary.h
+++ b/src/wasm-binary.h
@@ -37,7 +37,14 @@ namespace wasm {
 
 enum {
   // the maximum amount of bytes we emit per LEB
-  MaxLEB32Bytes = 5
+  MaxLEB32Bytes = 5,
+};
+
+// wasm VMs on the web have decided to impose some limits on what they
+// accept
+enum WebLimitations {
+  MaxDataSegments = 100 * 1000,
+  MaxFunctionBodySize = 128 * 1024
 };
 
 template<typename T, typename MiniT>
-- 
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