[PATCH] D33474: Print symbols from COFF import libraries

[Dave Lee via Phabricator via cfe-commits]

kastiglione created this revision.

This change allows `llvm-nm` to print symbols found in import libraries, in part
by allowing `COFFImportFile`s to be casted to `SymbolicFile`s.


https://reviews.llvm.org/D33474

Files:
  include/llvm/Object/Binary.h
  test/tools/llvm-nm/X86/Inputs/example.lib
  test/tools/llvm-nm/X86/importlibrary.test
  tools/llvm-nm/llvm-nm.cpp


Index: tools/llvm-nm/llvm-nm.cpp
===================================================================
--- tools/llvm-nm/llvm-nm.cpp
+++ tools/llvm-nm/llvm-nm.cpp
@@ -24,6 +24,7 @@
 #include "llvm/IR/Module.h"
 #include "llvm/Object/Archive.h"
 #include "llvm/Object/COFF.h"
+#include "llvm/Object/COFFImportFile.h"
 #include "llvm/Object/ELFObjectFile.h"
 #include "llvm/Object/IRObjectFile.h"
 #include "llvm/Object/MachO.h"
@@ -269,7 +270,7 @@
 static char isSymbolList64Bit(SymbolicFile &Obj) {
   if (auto *IRObj = dyn_cast<IRObjectFile>(&Obj))
     return Triple(IRObj->getTargetTriple()).isArch64Bit();
-  if (isa<COFFObjectFile>(Obj))
+  if (isa<COFFObjectFile>(Obj) || isa<COFFImportFile>(Obj))
     return false;
   if (isa<WasmObjectFile>(Obj))
     return false;
@@ -849,6 +850,18 @@
   return '?';
 }
 
+static char getSymbolNMTypeChar(COFFImportFile &Obj) {
+  switch (Obj.getCOFFImportHeader()->getType()) {
+  case COFF::IMPORT_CODE:
+    return 't';
+  case COFF::IMPORT_DATA:
+    return 'd';
+  case COFF::IMPORT_CONST:
+    return 'r';
+  }
+  return '?';
+}
+
 static char getSymbolNMTypeChar(MachOObjectFile &Obj, basic_symbol_iterator I) {
   DataRefImpl Symb = I->getRawDataRefImpl();
   uint8_t NType = Obj.is64Bit() ? Obj.getSymbol64TableEntry(Symb).n_type
@@ -932,6 +945,8 @@
     Ret = getSymbolNMTypeChar(*IR, I);
   else if (COFFObjectFile *COFF = dyn_cast<COFFObjectFile>(&Obj))
     Ret = getSymbolNMTypeChar(*COFF, I);
+  else if (COFFImportFile *COFFImport = dyn_cast<COFFImportFile>(&Obj))
+    Ret = getSymbolNMTypeChar(*COFFImport);
   else if (MachOObjectFile *MachO = dyn_cast<MachOObjectFile>(&Obj))
     Ret = getSymbolNMTypeChar(*MachO, I);
   else if (WasmObjectFile *Wasm = dyn_cast<WasmObjectFile>(&Obj))
Index: test/tools/llvm-nm/X86/importlibrary.test
===================================================================
--- /dev/null
+++ test/tools/llvm-nm/X86/importlibrary.test
@@ -0,0 +1,7 @@
+# RUN: llvm-nm -B %S/Inputs/example.lib | FileCheck --match-full-lines %s
+
+CHECK: 00000000 R __imp__constant
+CHECK: 00000000 R _constant
+CHECK: 00000000 D __imp__data
+CHECK: 00000000 T __imp__function
+CHECK: 00000000 T _function
Index: include/llvm/Object/Binary.h
===================================================================
--- include/llvm/Object/Binary.h
+++ include/llvm/Object/Binary.h
@@ -96,7 +96,7 @@
   }
 
   bool isSymbolic() const {
-    return isIR() || isObject();
+    return isIR() || isObject() || isCOFFImportFile();
   }
 
   bool isArchive() const {


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