[PATCH] D134169: [LLD][COFF] Improve symbol table info for import thunk

[Martin Storsjö via Phabricator via llvm-commits]

This revision was automatically updated to reflect the committed changes.
Closed by commit rG9509f4e6578b: [LLD][COFF] Improve symbol table info for import thunk (authored by alvinhochun, committed by mstorsjo).

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D134169/new/

https://reviews.llvm.org/D134169

Files:
  lld/COFF/Writer.cpp
  lld/test/COFF/symtab.test


Index: lld/test/COFF/symtab.test
===================================================================
--- lld/test/COFF/symtab.test
+++ lld/test/COFF/symtab.test
@@ -15,6 +15,15 @@
 # CHECK-NEXT:     Value: 80
 # CHECK-NEXT:     Section: .text (1)
 # CHECK-NEXT:     BaseType: Null (0x0)
+# CHECK-NEXT:     ComplexType: Function (0x2)
+# CHECK-NEXT:     StorageClass: External (0x2)
+# CHECK-NEXT:     AuxSymbolCount: 0
+# CHECK-NEXT:   }
+# CHECK-NEXT:   Symbol {
+# CHECK-NEXT:     Name: __imp_MessageBoxA
+# CHECK-NEXT:     Value:
+# CHECK-NEXT:     Section: .rdata (2)
+# CHECK-NEXT:     BaseType: Null (0x0)
 # CHECK-NEXT:     ComplexType: Null (0x0)
 # CHECK-NEXT:     StorageClass: External (0x2)
 # CHECK-NEXT:     AuxSymbolCount: 0
@@ -24,6 +33,15 @@
 # CHECK-NEXT:     Value: 64
 # CHECK-NEXT:     Section: .text (1)
 # CHECK-NEXT:     BaseType: Null (0x0)
+# CHECK-NEXT:     ComplexType: Function (0x2)
+# CHECK-NEXT:     StorageClass: External (0x2)
+# CHECK-NEXT:     AuxSymbolCount: 0
+# CHECK-NEXT:   }
+# CHECK-NEXT:   Symbol {
+# CHECK-NEXT:     Name: __imp_ExitProcess
+# CHECK-NEXT:     Value:
+# CHECK-NEXT:     Section: .rdata (2)
+# CHECK-NEXT:     BaseType: Null (0x0)
 # CHECK-NEXT:     ComplexType: Null (0x0)
 # CHECK-NEXT:     StorageClass: External (0x2)
 # CHECK-NEXT:     AuxSymbolCount: 0
Index: lld/COFF/Writer.cpp
===================================================================
--- lld/COFF/Writer.cpp
+++ lld/COFF/Writer.cpp
@@ -1179,6 +1179,10 @@
     COFFSymbolRef ref = d->getCOFFSymbol();
     sym.Type = ref.getType();
     sym.StorageClass = ref.getStorageClass();
+  } else if (def->kind() == Symbol::DefinedImportThunkKind) {
+    sym.Type = (IMAGE_SYM_DTYPE_FUNCTION << SCT_COMPLEX_TYPE_SHIFT) |
+               IMAGE_SYM_TYPE_NULL;
+    sym.StorageClass = IMAGE_SYM_CLASS_EXTERNAL;
   } else {
     sym.Type = IMAGE_SYM_TYPE_NULL;
     sym.StorageClass = IMAGE_SYM_CLASS_EXTERNAL;
@@ -1225,6 +1229,14 @@
 
         if (Optional<coff_symbol16> sym = createSymbol(d))
           outputSymtab.push_back(*sym);
+
+        if (auto *dthunk = dyn_cast<DefinedImportThunk>(d)) {
+          if (!dthunk->wrappedSym->writtenToSymtab) {
+            dthunk->wrappedSym->writtenToSymtab = true;
+            if (Optional<coff_symbol16> sym = createSymbol(dthunk->wrappedSym))
+              outputSymtab.push_back(*sym);
+          }
+        }
       }
     }
   }


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