From f467eceb2a9a8890855e57275993b47fda7b09fb Mon Sep 17 00:00:00 2001
From: Sean Callanan <scallanan@apple.com>
Date: Fri, 6 Apr 2012 18:21:09 +0000
Subject: [PATCH] Fixed two leaks in the MC disassembler.  The MC disassembler
 requires a MCSubtargetInfo and a MCInstrInfo to exist in order to initialize
 the instruction printer and disassembler; however, although the printer and
 disassembler keep references to these objects they do not own them.
 Previously, the MCSubtargetInfo and MCInstrInfo objects were just leaked.

I have extended LLVMDisasmContext to own these
objects and delete them when it is destroyed.

llvm-svn: 154192
---
 lib/MC/MCDisassembler/Disassembler.cpp |  4 +++-
 lib/MC/MCDisassembler/Disassembler.h   | 10 ++++++++++
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/lib/MC/MCDisassembler/Disassembler.cpp b/lib/MC/MCDisassembler/Disassembler.cpp
index 27f5c313161..35f675dc6d1 100644
--- a/lib/MC/MCDisassembler/Disassembler.cpp
+++ b/lib/MC/MCDisassembler/Disassembler.cpp
@@ -15,7 +15,9 @@
 #include "llvm/MC/MCDisassembler.h"
 #include "llvm/MC/MCInst.h"
 #include "llvm/MC/MCInstPrinter.h"
+#include "llvm/MC/MCInstrInfo.h"
 #include "llvm/MC/MCRegisterInfo.h"
+#include "llvm/MC/MCSubtargetInfo.h"
 #include "llvm/Support/MemoryObject.h"
 #include "llvm/Support/TargetRegistry.h"
 #include "llvm/Support/TargetSelect.h"
@@ -89,7 +91,7 @@ LLVMDisasmContextRef LLVMCreateDisasm(const char *TripleName, void *DisInfo,
   LLVMDisasmContext *DC = new LLVMDisasmContext(TripleName, DisInfo, TagType,
                                                 GetOpInfo, SymbolLookUp,
                                                 TheTarget, MAI, MRI,
-                                                Ctx, DisAsm, IP);
+                                                STI, MII, Ctx, DisAsm, IP);
   assert(DC && "Allocation failure!");
 
   return DC;
diff --git a/lib/MC/MCDisassembler/Disassembler.h b/lib/MC/MCDisassembler/Disassembler.h
index 238ff7d5002..880a31ad76b 100644
--- a/lib/MC/MCDisassembler/Disassembler.h
+++ b/lib/MC/MCDisassembler/Disassembler.h
@@ -28,7 +28,9 @@ class MCContext;
 class MCAsmInfo;
 class MCDisassembler;
 class MCInstPrinter; 
+class MCInstrInfo;
 class MCRegisterInfo;
+class MCSubtargetInfo;
 class Target;
 
 //
@@ -61,6 +63,10 @@ private:
   llvm::OwningPtr<const llvm::MCAsmInfo> MAI;
   // The register information for the target architecture.
   llvm::OwningPtr<const llvm::MCRegisterInfo> MRI;
+  // The subtarget information for the target architecture.
+  llvm::OwningPtr<const llvm::MCSubtargetInfo> MSI;
+  // The instruction information for the target architecture.
+  llvm::OwningPtr<const llvm::MCInstrInfo> MII;
   // The assembly context for creating symbols and MCExprs.
   llvm::OwningPtr<const llvm::MCContext> Ctx;
   // The disassembler for the target architecture.
@@ -78,6 +84,8 @@ public:
                     LLVMSymbolLookupCallback symbolLookUp,
                     const Target *theTarget, const MCAsmInfo *mAI,
                     const MCRegisterInfo *mRI,
+                    const MCSubtargetInfo *mSI,
+                    const MCInstrInfo *mII,
                     llvm::MCContext *ctx, const MCDisassembler *disAsm,
                     MCInstPrinter *iP) : TripleName(tripleName),
                     DisInfo(disInfo), TagType(tagType), GetOpInfo(getOpInfo),
@@ -85,6 +93,8 @@ public:
                     CommentStream(CommentsToEmit) {
     MAI.reset(mAI);
     MRI.reset(mRI);
+    MSI.reset(mSI);
+    MII.reset(mII);
     Ctx.reset(ctx);
     DisAsm.reset(disAsm);
     IP.reset(iP);