Split Finish into Finish and FinishImpl to have a common place to do end of

file error checking. Use that to error on an unfinished cfi_startproc.

The error is not nice, but is already better than a segmentation fault.

llvm-svn: 147717

11 files changed, 28 insertions, 21 deletions

diff --git a/llvm/lib/MC/MCAsmStreamer.cpp b/llvm/lib/MC/MCAsmStreamer.cpp
index 630a104b129..ca2f10ea7c7 100644
--- a/llvm/lib/MC/MCAsmStreamer.cpp
+++ b/llvm/lib/MC/MCAsmStreamer.cpp
@@ -255,7 +255,7 @@ public:
   /// indicated by the hasRawTextSupport() predicate.
   virtual void EmitRawText(StringRef String);
 
-  virtual void Finish();
+  virtual void FinishImpl();
 
   /// @}
 };
@@ -1285,7 +1285,7 @@ void MCAsmStreamer::EmitRawText(StringRef String) {
   EmitEOL();
 }
 
-void MCAsmStreamer::Finish() {
+void MCAsmStreamer::FinishImpl() {
   // Dump out the dwarf file & directory tables and line tables.
   if (getContext().hasDwarfFiles() && !UseLoc)
     MCDwarfFileTable::Emit(this);
diff --git a/llvm/lib/MC/MCELFStreamer.cpp b/llvm/lib/MC/MCELFStreamer.cpp
index dcc4666a266..aaae21f68ba 100644
--- a/llvm/lib/MC/MCELFStreamer.cpp
+++ b/llvm/lib/MC/MCELFStreamer.cpp
@@ -356,7 +356,7 @@ void MCELFStreamer::EmitInstToData(const MCInst &Inst) {
   DF->getContents().append(Code.begin(), Code.end());
 }
 
-void MCELFStreamer::Finish() {
+void MCELFStreamer::FinishImpl() {
   EmitFrames(true);
 
   for (std::vector<LocalCommon>::const_iterator i = LocalCommons.begin(),
@@ -379,7 +379,7 @@ void MCELFStreamer::Finish() {
       SectData.setAlignment(ByteAlignment);
   }
 
-  this->MCObjectStreamer::Finish();
+  this->MCObjectStreamer::FinishImpl();
 }
 
 MCStreamer *llvm::createELFStreamer(MCContext &Context, MCAsmBackend &MAB,
diff --git a/llvm/lib/MC/MCELFStreamer.h b/llvm/lib/MC/MCELFStreamer.h
index 10bf7758099..e28a88461e3 100644
--- a/llvm/lib/MC/MCELFStreamer.h
+++ b/llvm/lib/MC/MCELFStreamer.h
@@ -94,7 +94,7 @@ public:
 
   virtual void EmitFileDirective(StringRef Filename);
 
-  virtual void Finish();
+  virtual void FinishImpl();
 
 private:
   virtual void EmitInstToFragment(const MCInst &Inst);
diff --git a/llvm/lib/MC/MCLoggingStreamer.cpp b/llvm/lib/MC/MCLoggingStreamer.cpp
index d59b6d7acaf..18a9a94412a 100644
--- a/llvm/lib/MC/MCLoggingStreamer.cpp
+++ b/llvm/lib/MC/MCLoggingStreamer.cpp
@@ -243,9 +243,9 @@ public:
     return Child->EmitRawText(String);
   }
 
-  virtual void Finish() {
-    LogCall("Finish");
-    return Child->Finish();
+  virtual void FinishImpl() {
+    LogCall("FinishImpl");
+    return Child->FinishImpl();
   }
 
 };
diff --git a/llvm/lib/MC/MCMachOStreamer.cpp b/llvm/lib/MC/MCMachOStreamer.cpp
index 50ab1f86443..af0f160d464 100644
--- a/llvm/lib/MC/MCMachOStreamer.cpp
+++ b/llvm/lib/MC/MCMachOStreamer.cpp
@@ -89,7 +89,7 @@ public:
     //report_fatal_error("unsupported directive: '.file'");
   }
 
-  virtual void Finish();
+  virtual void FinishImpl();
 
   /// @}
 };
@@ -375,7 +375,7 @@ void MCMachOStreamer::EmitInstToData(const MCInst &Inst) {
   DF->getContents().append(Code.begin(), Code.end());
 }
 
-void MCMachOStreamer::Finish() {
+void MCMachOStreamer::FinishImpl() {
   EmitFrames(true);
 
   // We have to set the fragment atom associations so we can relax properly for
@@ -407,7 +407,7 @@ void MCMachOStreamer::Finish() {
     }
   }
 
-  this->MCObjectStreamer::Finish();
+  this->MCObjectStreamer::FinishImpl();
 }
 
 MCStreamer *llvm::createMachOStreamer(MCContext &Context, MCAsmBackend &MAB,
diff --git a/llvm/lib/MC/MCNullStreamer.cpp b/llvm/lib/MC/MCNullStreamer.cpp
index ca74663693d..432974f8d77 100644
--- a/llvm/lib/MC/MCNullStreamer.cpp
+++ b/llvm/lib/MC/MCNullStreamer.cpp
@@ -94,7 +94,7 @@ namespace {
                                        StringRef FileName) {}
     virtual void EmitInstruction(const MCInst &Inst) {}
 
-    virtual void Finish() {}
+    virtual void FinishImpl() {}
     
     /// @}
   };
diff --git a/llvm/lib/MC/MCObjectStreamer.cpp b/llvm/lib/MC/MCObjectStreamer.cpp
index 663d0ca4911..76c853c3a8d 100644
--- a/llvm/lib/MC/MCObjectStreamer.cpp
+++ b/llvm/lib/MC/MCObjectStreamer.cpp
@@ -255,7 +255,7 @@ void MCObjectStreamer::EmitGPRel32Value(const MCExpr *Value) {
   DF->getContents().resize(DF->getContents().size() + 4, 0);
 }
 
-void MCObjectStreamer::Finish() {
+void MCObjectStreamer::FinishImpl() {
   // Dump out the dwarf file & directory tables and line tables.
   if (getContext().hasDwarfFiles())
     MCDwarfFileTable::Emit(this);
diff --git a/llvm/lib/MC/MCPureStreamer.cpp b/llvm/lib/MC/MCPureStreamer.cpp
index 1a2a92e3293..20a3bdb0144 100644
--- a/llvm/lib/MC/MCPureStreamer.cpp
+++ b/llvm/lib/MC/MCPureStreamer.cpp
@@ -48,7 +48,7 @@ public:
                                  unsigned MaxBytesToEmit = 0);
   virtual void EmitValueToOffset(const MCExpr *Offset,
                                  unsigned char Value = 0);
-  virtual void Finish();
+  virtual void FinishImpl();
 
 
   virtual void EmitSymbolAttribute(MCSymbol *Symbol, MCSymbolAttr Attribute) {
@@ -224,10 +224,10 @@ void MCPureStreamer::EmitInstToData(const MCInst &Inst) {
   DF->getContents().append(Code.begin(), Code.end());
 }
 
-void MCPureStreamer::Finish() {
+void MCPureStreamer::FinishImpl() {
   // FIXME: Handle DWARF tables?
 
-  this->MCObjectStreamer::Finish();
+  this->MCObjectStreamer::FinishImpl();
 }
 
 MCStreamer *llvm::createPureStreamer(MCContext &Context, MCAsmBackend &MAB,
diff --git a/llvm/lib/MC/MCStreamer.cpp b/llvm/lib/MC/MCStreamer.cpp
index 8567941c45a..ce9de9d4c51 100644
--- a/llvm/lib/MC/MCStreamer.cpp
+++ b/llvm/lib/MC/MCStreamer.cpp
@@ -652,3 +652,10 @@ void MCStreamer::EmitW64Tables() {
 
   MCWin64EHUnwindEmitter::Emit(*this);
 }
+
+void MCStreamer::Finish() {
+  if (!FrameInfos.empty() && !FrameInfos.back().End)
+    report_fatal_error("Unfinished frame!");
+
+  FinishImpl();
+}
diff --git a/llvm/lib/MC/WinCOFFStreamer.cpp b/llvm/lib/MC/WinCOFFStreamer.cpp
index f2fecae79c8..265f0daef0f 100644
--- a/llvm/lib/MC/WinCOFFStreamer.cpp
+++ b/llvm/lib/MC/WinCOFFStreamer.cpp
@@ -79,7 +79,7 @@ public:
   virtual void EmitFileDirective(StringRef Filename);
   virtual void EmitInstruction(const MCInst &Instruction);
   virtual void EmitWin64EHHandlerData();
-  virtual void Finish();
+  virtual void FinishImpl();
 
 private:
   virtual void EmitInstToFragment(const MCInst &Inst) {
@@ -401,9 +401,9 @@ void WinCOFFStreamer::EmitWin64EHHandlerData() {
   MCWin64EHUnwindEmitter::EmitUnwindInfo(*this, getCurrentW64UnwindInfo());
 }
 
-void WinCOFFStreamer::Finish() {
+void WinCOFFStreamer::FinishImpl() {
   EmitW64Tables();
-  MCObjectStreamer::Finish();
+  MCObjectStreamer::FinishImpl();
 }
 
 namespace llvm
diff --git a/llvm/lib/Target/PTX/PTXMCAsmStreamer.cpp b/llvm/lib/Target/PTX/PTXMCAsmStreamer.cpp
index bc7aaa3e41d..270ed2d29fd 100644
--- a/llvm/lib/Target/PTX/PTXMCAsmStreamer.cpp
+++ b/llvm/lib/Target/PTX/PTXMCAsmStreamer.cpp
@@ -176,7 +176,7 @@ public:
   /// indicated by the hasRawTextSupport() predicate.
   virtual void EmitRawText(StringRef String);
 
-  virtual void Finish();
+  virtual void FinishImpl();
 
   /// @}
 
@@ -540,7 +540,7 @@ void PTXMCAsmStreamer::EmitRawText(StringRef String) {
   EmitEOL();
 }
 
-void PTXMCAsmStreamer::Finish() {}
+void PTXMCAsmStreamer::FinishImpl() {}
 
 namespace llvm {
   MCStreamer *createPTXAsmStreamer(MCContext &Context,