[llvm/Object] - Convert SectionRef::getName() to return Expected<>

SectionRef::getName() returns std::error_code now.
Returning Expected<> instead has multiple benefits.

For example, it forces user to check the error returned.
Also Expected<> may keep a valuable string error message,
what is more useful than having a error code.
(Object\invalid.test was updated to show the new messages printed.)

This patch makes a change for all users to switch to Expected<> version.

Note: in a few places the error returned was ignored before my changes.
In such places I left them ignored. My intention was to convert the interface
used, and not to improve and/or the existent users in this patch.
(Though I think this is good idea for a follow-ups to revisit such places
and either remove consumeError calls or comment each of them to clarify why
it is OK to have them).

Differential revision: https://reviews.llvm.org/D66089

llvm-svn: 368812

1 files changed, 1 insertions, 2 deletions

diff --git a/llvm/tools/llvm-objdump/COFFDump.cpp b/llvm/tools/llvm-objdump/COFFDump.cpp
index 1ba0a68902c..3fb9285bf27 100644
--- a/llvm/tools/llvm-objdump/COFFDump.cpp
+++ b/llvm/tools/llvm-objdump/COFFDump.cpp
@@ -442,8 +442,7 @@ static bool getPDataSection(const COFFObjectFile *Obj,
                             std::vector<RelocationRef> &Rels,
                             const RuntimeFunction *&RFStart, int &NumRFs) {
   for (const SectionRef &Section : Obj->sections()) {
-    StringRef Name;
-    error(Section.getName(Name));
+    StringRef Name = unwrapOrError(Section.getName(), Obj->getFileName());
     if (Name != ".pdata")
       continue;