From 7804dbddccba412087a15cab8db4412939700952 Mon Sep 17 00:00:00 2001
From: Sam Clegg <sbc@chromium.org>
Date: Tue, 21 May 2019 10:07:30 +0000
Subject: [WebAssembly] Add __start_/_stop_ symbols for data sections

Fixes https://bugs.llvm.org/show_bug.cgi?id=41565

Differential Revision: https://reviews.llvm.org/D61876

llvm-svn: 361236
---
 lld/wasm/SymbolTable.cpp | 11 +++++++++++
 1 file changed, 11 insertions(+)

(limited to 'lld/wasm/SymbolTable.cpp')

diff --git a/lld/wasm/SymbolTable.cpp b/lld/wasm/SymbolTable.cpp
index 1a16b6390ba..ce1aa5132ba 100644
--- a/lld/wasm/SymbolTable.cpp
+++ b/lld/wasm/SymbolTable.cpp
@@ -198,6 +198,17 @@ DefinedFunction *SymbolTable::addSyntheticFunction(StringRef Name,
                                         Flags, nullptr, Function);
 }
 
+DefinedData *SymbolTable::addOptionalDataSymbol(StringRef Name, uint32_t Value,
+                                                uint32_t Flags) {
+  Symbol *S = find(Name);
+  if (!S || S->isDefined())
+    return nullptr;
+  LLVM_DEBUG(dbgs() << "addOptionalDataSymbol: " << Name << "\n");
+  auto *rtn = replaceSymbol<DefinedData>(S, Name, Flags);
+  rtn->setVirtualAddress(Value);
+  return rtn;
+}
+
 DefinedData *SymbolTable::addSyntheticDataSymbol(StringRef Name,
                                                  uint32_t Flags) {
   LLVM_DEBUG(dbgs() << "addSyntheticDataSymbol: " << Name << "\n");
-- 
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