[llvm] r294013 - Object: Handle files without a dynamic symbol table.

[Peter Collingbourne via llvm-commits]

Author: pcc
Date: Fri Feb  3 10:53:55 2017
New Revision: 294013

URL: http://llvm.org/viewvc/llvm-project?rev=294013&view=rev
Log:
Object: Handle files without a dynamic symbol table.

Differential Revision: https://reviews.llvm.org/D29482

Modified:
    llvm/trunk/include/llvm/Object/ELFObjectFile.h
    llvm/trunk/test/Object/nm-shared-object.test

Modified: llvm/trunk/include/llvm/Object/ELFObjectFile.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/Object/ELFObjectFile.h?rev=294013&r1=294012&r2=294013&view=diff
==============================================================================
--- llvm/trunk/include/llvm/Object/ELFObjectFile.h (original)
+++ llvm/trunk/include/llvm/Object/ELFObjectFile.h Fri Feb  3 10:53:55 2017
@@ -895,6 +895,8 @@ elf_symbol_iterator ELFObjectFile<ELFT>:
 template <class ELFT>
 elf_symbol_iterator ELFObjectFile<ELFT>::dynamic_symbol_end() const {
   const Elf_Shdr *SymTab = DotDynSymSec;
+  if (!SymTab)
+    return dynamic_symbol_begin();
   DataRefImpl Sym = toDRI(SymTab, SymTab->sh_size / sizeof(Elf_Sym));
   return basic_symbol_iterator(SymbolRef(Sym, this));
 }

Modified: llvm/trunk/test/Object/nm-shared-object.test
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Object/nm-shared-object.test?rev=294013&r1=294012&r2=294013&view=diff
==============================================================================
--- llvm/trunk/test/Object/nm-shared-object.test (original)
+++ llvm/trunk/test/Object/nm-shared-object.test Fri Feb  3 10:53:55 2017
@@ -29,3 +29,5 @@ RUN: not llvm-nm -D %p/Inputs/trivial-ob
 RUN:         | FileCheck %s -check-prefix ERROR
 
 ERROR: File format has no dynamic symbol table.
+
+RUN: llvm-nm -D %p/Inputs/trivial-object-test.elf-i386 | count 0