From 08bbd35a80bf7765fe0d3043f9eb5a2f2786b649 Mon Sep 17 00:00:00 2001
From: Dimitry Andric <dim@FreeBSD.org>
Date: Mon, 26 Jun 2017 20:32:52 +0000
Subject: Vendor import of llvm trunk r306325:
 https://llvm.org/svn/llvm-project/llvm/trunk@306325

---
 lib/ProfileData/Coverage/CoverageMappingReader.cpp | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

(limited to 'lib/ProfileData/Coverage/CoverageMappingReader.cpp')

diff --git a/lib/ProfileData/Coverage/CoverageMappingReader.cpp b/lib/ProfileData/Coverage/CoverageMappingReader.cpp
index a34f359cd5427..fff0a03ccbe01 100644
--- a/lib/ProfileData/Coverage/CoverageMappingReader.cpp
+++ b/lib/ProfileData/Coverage/CoverageMappingReader.cpp
@@ -1,4 +1,4 @@
-//===- CoverageMappingReader.cpp - Code coverage mapping reader -*- C++ -*-===//
+//===- CoverageMappingReader.cpp - Code coverage mapping reader -----------===//
 //
 //                     The LLVM Compiler Infrastructure
 //
@@ -62,7 +62,7 @@ void CoverageMappingIterator::increment() {
 }
 
 Error RawCoverageReader::readULEB128(uint64_t &Result) {
-  if (Data.size() < 1)
+  if (Data.empty())
     return make_error<CoverageMapError>(coveragemap_error::truncated);
   unsigned N = 0;
   Result = decodeULEB128(reinterpret_cast<const uint8_t *>(Data.data()), &N);
@@ -392,9 +392,9 @@ struct CovMapFuncRecordReader {
 // A class for reading coverage mapping function records for a module.
 template <CovMapVersion Version, class IntPtrT, support::endianness Endian>
 class VersionedCovMapFuncRecordReader : public CovMapFuncRecordReader {
-  typedef typename CovMapTraits<
-      Version, IntPtrT>::CovMapFuncRecordType FuncRecordType;
-  typedef typename CovMapTraits<Version, IntPtrT>::NameRefType  NameRefType;
+  using FuncRecordType =
+      typename CovMapTraits<Version, IntPtrT>::CovMapFuncRecordType;
+  using NameRefType = typename CovMapTraits<Version, IntPtrT>::NameRefType;
 
   // Maps function's name references to the indexes of their records
   // in \c Records.
@@ -419,6 +419,8 @@ class VersionedCovMapFuncRecordReader : public CovMapFuncRecordReader {
       StringRef FuncName;
       if (Error Err = CFR->template getFuncName<Endian>(ProfileNames, FuncName))
         return Err;
+      if (FuncName.empty())
+        return make_error<InstrProfError>(instrprof_error::malformed);
       Records.emplace_back(Version, FuncName, FuncHash, Mapping, FilenamesBegin,
                            Filenames.size() - FilenamesBegin);
       return Error::success();
@@ -574,7 +576,7 @@ static Error loadTestingFormat(StringRef Data, InstrProfSymtab &ProfileNames,
   Endian = support::endianness::little;
 
   Data = Data.substr(StringRef(TestingFormatMagic).size());
-  if (Data.size() < 1)
+  if (Data.empty())
     return make_error<CoverageMapError>(coveragemap_error::truncated);
   unsigned N = 0;
   auto ProfileNamesSize =
@@ -582,7 +584,7 @@ static Error loadTestingFormat(StringRef Data, InstrProfSymtab &ProfileNames,
   if (N > Data.size())
     return make_error<CoverageMapError>(coveragemap_error::malformed);
   Data = Data.substr(N);
-  if (Data.size() < 1)
+  if (Data.empty())
     return make_error<CoverageMapError>(coveragemap_error::truncated);
   N = 0;
   uint64_t Address =
@@ -596,7 +598,7 @@ static Error loadTestingFormat(StringRef Data, InstrProfSymtab &ProfileNames,
     return E;
   CoverageMapping = Data.substr(ProfileNamesSize);
   // Skip the padding bytes because coverage map data has an alignment of 8.
-  if (CoverageMapping.size() < 1)
+  if (CoverageMapping.empty())
     return make_error<CoverageMapError>(coveragemap_error::truncated);
   size_t Pad = alignmentAdjustment(CoverageMapping.data(), 8);
   if (CoverageMapping.size() < Pad)
-- 
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