[lld] r316726 - Include an error code when getRandomBytes failed.

[Rui Ueyama via llvm-commits]

Author: ruiu
Date: Thu Oct 26 18:25:29 2017
New Revision: 316726

URL: http://llvm.org/viewvc/llvm-project?rev=316726&view=rev
Log:
Include an error code when getRandomBytes failed.

In a rare situation, the function can fail (e.g. it fails if it cannot
open /dev/urandom.)

Modified:
    lld/trunk/ELF/SyntheticSections.cpp

Modified: lld/trunk/ELF/SyntheticSections.cpp
URL: http://llvm.org/viewvc/llvm-project/lld/trunk/ELF/SyntheticSections.cpp?rev=316726&r1=316725&r2=316726&view=diff
==============================================================================
--- lld/trunk/ELF/SyntheticSections.cpp (original)
+++ lld/trunk/ELF/SyntheticSections.cpp Thu Oct 26 18:25:29 2017
@@ -386,8 +386,8 @@ void BuildIdSection::writeBuildId(ArrayR
     });
     break;
   case BuildIdKind::Uuid:
-    if (getRandomBytes(HashBuf, HashSize))
-      error("entropy source failure");
+    if (auto EC = getRandomBytes(HashBuf, HashSize))
+      error("entropy source failure: " + EC.message());
     break;
   case BuildIdKind::Hexstring:
     memcpy(HashBuf, Config->BuildIdVector.data(), Config->BuildIdVector.size());