[DWARF parser] DWARFDebugFrame: use unique_ptr instead of raw pointer

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@207459 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 10 insertions, 23 deletions

diff --git a/lib/DebugInfo/DWARFDebugFrame.cpp b/lib/DebugInfo/DWARFDebugFrame.cpp
index 425c47cbf0..a4d1226ea4 100644
--- a/lib/DebugInfo/DWARFDebugFrame.cpp
+++ b/lib/DebugInfo/DWARFDebugFrame.cpp
@@ -285,14 +285,9 @@ private:
 DWARFDebugFrame::DWARFDebugFrame() {
 }
 
-
 DWARFDebugFrame::~DWARFDebugFrame() {
-  for (const auto &Entry : Entries) {
-    delete Entry;
-  }
 }
 
-
 static void LLVM_ATTRIBUTE_UNUSED dumpDataAux(DataExtractor Data,
                                               uint32_t Offset, int Length) {
   errs() << "DUMP: ";
@@ -334,7 +329,6 @@ void DWARFDebugFrame::parse(DataExtractor Data) {
     Id = Data.getUnsigned(&Offset, IsDWARF64 ? 8 : 4);
     bool IsCIE = ((IsDWARF64 && Id == DW64_CIE_ID) || Id == DW_CIE_ID);
 
-    FrameEntry *Entry = nullptr;
     if (IsCIE) {
       // Note: this is specifically DWARFv3 CIE header structure. It was
       // changed in DWARFv4. We currently don't support reading DWARFv4
@@ -346,30 +340,25 @@ void DWARFDebugFrame::parse(DataExtractor Data) {
       int64_t DataAlignmentFactor = Data.getSLEB128(&Offset);
       uint64_t ReturnAddressRegister = Data.getULEB128(&Offset);
 
-      Entry = new CIE(Data, StartOffset, Length, Version,
-                      StringRef(Augmentation), CodeAlignmentFactor,
-                      DataAlignmentFactor, ReturnAddressRegister);
+      Entries.emplace_back(new CIE(Data, StartOffset, Length, Version,
+                                   StringRef(Augmentation), CodeAlignmentFactor,
+                                   DataAlignmentFactor, ReturnAddressRegister));
     } else {
       // FDE
       uint64_t CIEPointer = Id;
       uint64_t InitialLocation = Data.getAddress(&Offset);
       uint64_t AddressRange = Data.getAddress(&Offset);
 
-      Entry = new FDE(Data, StartOffset, Length, CIEPointer,
-                      InitialLocation, AddressRange);
+      Entries.emplace_back(new FDE(Data, StartOffset, Length, CIEPointer,
+                                   InitialLocation, AddressRange));
     }
 
-    assert(Entry && "Expected Entry to be populated with CIE or FDE");
-    Entry->parseInstructions(&Offset, EndStructureOffset);
+    Entries.back()->parseInstructions(&Offset, EndStructureOffset);
 
-    if (Offset == EndStructureOffset) {
-      // Entry instrucitons parsed successfully.
-      Entries.push_back(Entry);
-    } else {
+    if (Offset != EndStructureOffset) {
       std::string Str;
       raw_string_ostream OS(Str);
-      OS << format("Parsing entry instructions at %lx failed",
-                   Entry->getOffset());
+      OS << format("Parsing entry instructions at %lx failed", StartOffset);
       report_fatal_error(Str);
     }
   }
diff --git a/lib/DebugInfo/DWARFDebugFrame.h b/lib/DebugInfo/DWARFDebugFrame.h
index 7683849b4a..bd4ef45e4c 100644
--- a/lib/DebugInfo/DWARFDebugFrame.h
+++ b/lib/DebugInfo/DWARFDebugFrame.h
@@ -12,14 +12,13 @@
 
 #include "llvm/Support/DataExtractor.h"
 #include "llvm/Support/raw_ostream.h"
+#include <memory>
 #include <vector>
 
-
 namespace llvm {
 
 class FrameEntry;
 
-
 /// \brief A parsed .debug_frame section
 ///
 class DWARFDebugFrame {
@@ -35,8 +34,7 @@ public:
   void parse(DataExtractor Data);
 
 private:
-  typedef std::vector<FrameEntry *> EntryVector;
-  EntryVector Entries;
+  std::vector<std::unique_ptr<FrameEntry>> Entries;
 };