[Object] Add {begin,end}_dynamic_symbols stubs and implementation for ELF.

Add -D option to llvm-nm to dump dynamic symbols.

Patch by David Meyer.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151600 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 13 insertions, 3 deletions

diff --git a/tools/llvm-nm/llvm-nm.cpp b/tools/llvm-nm/llvm-nm.cpp
index 13356f81b8..8688d4af65 100644
--- a/tools/llvm-nm/llvm-nm.cpp
+++ b/tools/llvm-nm/llvm-nm.cpp
@@ -61,6 +61,12 @@ namespace {
   cl::alias UndefinedOnly2("u", cl::desc("Alias for --undefined-only"),
                            cl::aliasopt(UndefinedOnly));
 
+  cl::opt<bool> DynamicSyms("dynamic",
+                             cl::desc("Display the dynamic symbols instead "
+                                      "of normal symbols."));
+  cl::alias DynamicSyms2("D", cl::desc("Alias for --dynamic"),
+                         cl::aliasopt(DynamicSyms));
+
   cl::opt<bool> DefinedOnly("defined-only",
                             cl::desc("Show only defined symbols"));
 
@@ -277,9 +283,13 @@ static void DumpSymbolNamesFromModule(Module *M) {
 
 static void DumpSymbolNamesFromObject(ObjectFile *obj) {
   error_code ec;
-  for (symbol_iterator i = obj->begin_symbols(),
-                       e = obj->end_symbols();
-                       i != e; i.increment(ec)) {
+  symbol_iterator ibegin = obj->begin_symbols();
+  symbol_iterator iend = obj->end_symbols();
+  if (DynamicSyms) {
+    ibegin = obj->begin_dynamic_symbols();
+    iend = obj->end_dynamic_symbols();
+  }
+  for (symbol_iterator i = ibegin; i != iend; i.increment(ec)) {
     if (error(ec)) break;
     bool internal;
     if (error(i->isInternal(internal))) break;