[llvm-nm][WebAssembly] Print function symbol sizes (#81315)

nm already prints sizes for data symbols. Do that for function symbols 
too, and update objdump to also print size information.

Implements item 3 from https://github.com/llvm/llvm-project/issues/76107

1 files changed, 14 insertions, 0 deletions

diff --git a/llvm/lib/Object/WasmObjectFile.cpp b/llvm/lib/Object/WasmObjectFile.cpp
index 1d68687..04e2b80 100644
--- a/llvm/lib/Object/WasmObjectFile.cpp
+++ b/llvm/lib/Object/WasmObjectFile.cpp
@@ -1932,6 +1932,20 @@ uint32_t WasmObjectFile::getSymbolSectionIdImpl(const WasmSymbol &Sym) const {
   }
 }
 
+uint32_t WasmObjectFile::getSymbolSize(SymbolRef Symb) const {
+  const WasmSymbol &Sym = getWasmSymbol(Symb);
+  if (!Sym.isDefined())
+    return 0;
+  if (Sym.isTypeData())
+    return Sym.Info.DataRef.Size;
+  if (Sym.isTypeFunction())
+    return functions()[Sym.Info.ElementIndex - getNumImportedFunctions()].Size;
+  // Currently symbol size is only tracked for data segments and functions. In
+  // principle we could also track size (e.g. binary size) for tables, globals
+  // and element segments etc too.
+  return 0;
+}
+
 void WasmObjectFile::moveSectionNext(DataRefImpl &Sec) const { Sec.d.a++; }
 
 Expected<StringRef> WasmObjectFile::getSectionName(DataRefImpl Sec) const {