[WebAssembly] Update dylink section parsing

This updates the format of the dylink section in accordance with
recent "spec" change:
  https://github.com/WebAssembly/tool-conventions/pull/77

Differential Revision: https://reviews.llvm.org/D55609

llvm-svn: 348989

1 files changed, 6 insertions, 0 deletions

diff --git a/llvm/lib/Object/WasmObjectFile.cpp b/llvm/lib/Object/WasmObjectFile.cpp
index 895d45c470f..1a687d94d7f 100644
--- a/llvm/lib/Object/WasmObjectFile.cpp
+++ b/llvm/lib/Object/WasmObjectFile.cpp
@@ -319,6 +319,10 @@ Error WasmObjectFile::parseDylinkSection(ReadContext &Ctx) {
   DylinkInfo.MemoryAlignment = readVaruint32(Ctx);
   DylinkInfo.TableSize = readVaruint32(Ctx);
   DylinkInfo.TableAlignment = readVaruint32(Ctx);
+  uint32_t Count = readVaruint32(Ctx);
+  while (Count--) {
+    DylinkInfo.Needed.push_back(readString(Ctx));
+  }
   if (Ctx.Ptr != Ctx.End)
     return make_error<GenericBinaryError>("dylink section ended prematurely",
                                           object_error::parse_failed);
@@ -1405,6 +1409,8 @@ SubtargetFeatures WasmObjectFile::getFeatures() const {
 
 bool WasmObjectFile::isRelocatableObject() const { return HasLinkingSection; }
 
+bool WasmObjectFile::isSharedObject() const { return HasDylinkSection; }
+
 const WasmSection &WasmObjectFile::getWasmSection(DataRefImpl Ref) const {
   assert(Ref.d.a < Sections.size());
   return Sections[Ref.d.a];