[LLVMdev] Fwd: [llvm] r224703 - The leak detector is dead, long live asan and valgrind.
Philip Reames
listmail at philipreames.com
Mon Dec 29 11:44:01 PST 2014
Forwarding for increased visibility.
-------- Forwarded Message --------
Subject: [llvm] r224703 - The leak detector is dead, long live asan and
valgrind.
Date: Mon, 22 Dec 2014 13:00:36 -0000
From: Rafael Espindola <rafael.espindola at gmail.com>
To: llvm-commits at cs.uiuc.edu
Author: rafael
Date: Mon Dec 22 07:00:36 2014
New Revision: 224703
URL: http://llvm.org/viewvc/llvm-project?rev=224703&view=rev
Log:
The leak detector is dead, long live asan and valgrind.
In resent times asan and valgrind have found way more memory management bugs
in llvm than the special purpose leak detector.
Removed:
llvm/trunk/include/llvm/IR/LeakDetector.h
llvm/trunk/lib/IR/LeakDetector.cpp
llvm/trunk/unittests/IR/LeakDetectorTest.cpp
Modified:
llvm/trunk/lib/CodeGen/MachineBasicBlock.cpp
llvm/trunk/lib/IR/BasicBlock.cpp
llvm/trunk/lib/IR/CMakeLists.txt
llvm/trunk/lib/IR/Function.cpp
llvm/trunk/lib/IR/Globals.cpp
llvm/trunk/lib/IR/Instruction.cpp
llvm/trunk/lib/IR/Metadata.cpp
llvm/trunk/lib/IR/Module.cpp
llvm/trunk/lib/IR/Value.cpp
llvm/trunk/unittests/IR/CMakeLists.txt
Removed: llvm/trunk/include/llvm/IR/LeakDetector.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/IR/LeakDetector.h?rev=224702&view=auto
==============================================================================
--- llvm/trunk/include/llvm/IR/LeakDetector.h (original)
+++ llvm/trunk/include/llvm/IR/LeakDetector.h (removed)
@@ -1,95 +0,0 @@
-//===- LeakDetector.h - Provide leak detection ------------------*- C++ -*-===//
-//
-// The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file defines a class that can be used to provide very simple memory leak
-// checks for an API. Basically LLVM uses this to make sure that Instructions,
-// for example, are deleted when they are supposed to be, and not leaked away.
-//
-// When compiling with NDEBUG (Release build), this class does nothing, thus
-// adding no checking overhead to release builds. Note that this class is
-// implemented in a very simple way, requiring completely manual manipulation
-// and checking for garbage, but this is intentional: users should not be using
-// this API, only other APIs should.
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef LLVM_IR_LEAKDETECTOR_H
-#define LLVM_IR_LEAKDETECTOR_H
-
-#include <string>
-
-namespace llvm {
-
-class LLVMContext;
-class Value;
-class MDNode;
-
-struct LeakDetector {
- /// addGarbageObject - Add a pointer to the internal set of "garbage" object
- /// pointers. This should be called when objects are created, or if they are
- /// taken out of an owning collection.
- ///
- template <class T> static void addGarbageObject(T *Object) {
-#ifndef NDEBUG
- addGarbageObjectImpl(Object);
-#endif
- }
-
- /// removeGarbageObject - Remove a pointer from our internal representation of
- /// our "garbage" objects. This should be called when an object is added to
- /// an "owning" collection.
- ///
- template <class T> static void removeGarbageObject(T *Object) {
-#ifndef NDEBUG
- removeGarbageObjectImpl(Object);
-#endif
- }
-
- /// checkForGarbage - Traverse the internal representation of garbage
- /// pointers. If there are any pointers that have been add'ed, but not
- /// remove'd, big obnoxious warnings about memory leaks are issued.
- ///
- /// The specified message will be printed indicating when the check was
- /// performed.
- ///
- static void checkForGarbage(LLVMContext &C, const std::string &Message) {
-#ifndef NDEBUG
- checkForGarbageImpl(C, Message);
-#endif
- }
-
-private:
- /// Overload the normal methods to work better with Value* because they are
- /// by far the most common in LLVM.
- ///
- /// Besides making the warning messages nicer, this hides errors by storing
- /// Value* in a different leak-detection container than other classes.
- static void addGarbageObjectImpl(const Value *Object);
- static void removeGarbageObjectImpl(const Value *Object);
-
- /// Overload the normal methods to work better with MDNode* to improve error
- /// messages.
- ///
- /// For better or worse, this hides errors when other types are added as
- /// garbage, deleted without being removed, and an MDNode is allocated in the
- /// same spot.
- ///
- /// \note Only handle \a MDNode for now, since we can't always get access to
- /// an \a LLVMContext for other \a Metadata types.
- static void addGarbageObjectImpl(const MDNode *Object);
- static void removeGarbageObjectImpl(const MDNode *Object);
-
- static void addGarbageObjectImpl(void *Object);
- static void removeGarbageObjectImpl(void *Object);
- static void checkForGarbageImpl(LLVMContext &C, const std::string &Message);
-};
-
-} // End llvm namespace
-
-#endif
Modified: llvm/trunk/lib/CodeGen/MachineBasicBlock.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/MachineBasicBlock.cpp?rev=224703&r1=224702&r2=224703&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/MachineBasicBlock.cpp (original)
+++ llvm/trunk/lib/CodeGen/MachineBasicBlock.cpp Mon Dec 22 07:00:36 2014
@@ -24,7 +24,6 @@
#include "llvm/CodeGen/SlotIndexes.h"
#include "llvm/IR/BasicBlock.h"
#include "llvm/IR/DataLayout.h"
-#include "llvm/IR/LeakDetector.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCContext.h"
#include "llvm/Support/Debug.h"
@@ -45,7 +44,6 @@ MachineBasicBlock::MachineBasicBlock(Mac
}
MachineBasicBlock::~MachineBasicBlock() {
- LeakDetector::removeGarbageObject(this);
}
/// getSymbol - Return the MCSymbol for this basic block.
@@ -85,14 +83,11 @@ void ilist_traits<MachineBasicBlock>::ad
for (MachineBasicBlock::instr_iterator
I = N->instr_begin(), E = N->instr_end(); I != E; ++I)
I->AddRegOperandsToUseLists(RegInfo);
-
- LeakDetector::removeGarbageObject(N);
}
void ilist_traits<MachineBasicBlock>::removeNodeFromList(MachineBasicBlock *N) {
N->getParent()->removeFromMBBNumbering(N->Number);
N->Number = -1;
- LeakDetector::addGarbageObject(N);
}
Modified: llvm/trunk/lib/IR/BasicBlock.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/IR/BasicBlock.cpp?rev=224703&r1=224702&r2=224703&view=diff
==============================================================================
--- llvm/trunk/lib/IR/BasicBlock.cpp (original)
+++ llvm/trunk/lib/IR/BasicBlock.cpp Mon Dec 22 07:00:36 2014
@@ -19,7 +19,6 @@
#include "llvm/IR/Instructions.h"
#include "llvm/IR/IntrinsicInst.h"
#include "llvm/IR/LLVMContext.h"
-#include "llvm/IR/LeakDetector.h"
#include "llvm/IR/Type.h"
#include <algorithm>
using namespace llvm;
@@ -47,9 +46,6 @@ BasicBlock::BasicBlock(LLVMContext &C, c
BasicBlock *InsertBefore)
: Value(Type::getLabelTy(C), Value::BasicBlockVal), Parent(nullptr) {
- // Make sure that we get added to a function
- LeakDetector::addGarbageObject(this);
-
if (NewParent)
insertInto(NewParent, InsertBefore);
else
@@ -94,14 +90,8 @@ BasicBlock::~BasicBlock() {
}
void BasicBlock::setParent(Function *parent) {
- if (getParent())
- LeakDetector::addGarbageObject(this);
-
// Set Parent=parent, updating instruction symtab entries as appropriate.
InstList.setSymTabObject(&Parent, parent);
-
- if (getParent())
- LeakDetector::removeGarbageObject(this);
}
void BasicBlock::removeFromParent() {
Modified: llvm/trunk/lib/IR/CMakeLists.txt
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/IR/CMakeLists.txt?rev=224703&r1=224702&r2=224703&view=diff
==============================================================================
--- llvm/trunk/lib/IR/CMakeLists.txt (original)
+++ llvm/trunk/lib/IR/CMakeLists.txt Mon Dec 22 07:00:36 2014
@@ -27,7 +27,6 @@ add_llvm_library(LLVMCore
IntrinsicInst.cpp
LLVMContext.cpp
LLVMContextImpl.cpp
- LeakDetector.cpp
LegacyPassManager.cpp
MDBuilder.cpp
Mangler.cpp
Modified: llvm/trunk/lib/IR/Function.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/IR/Function.cpp?rev=224703&r1=224702&r2=224703&view=diff
==============================================================================
--- llvm/trunk/lib/IR/Function.cpp (original)
+++ llvm/trunk/lib/IR/Function.cpp Mon Dec 22 07:00:36 2014
@@ -23,7 +23,6 @@
#include "llvm/IR/InstIterator.h"
#include "llvm/IR/IntrinsicInst.h"
#include "llvm/IR/LLVMContext.h"
-#include "llvm/IR/LeakDetector.h"
#include "llvm/IR/Module.h"
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Support/RWMutex.h"
@@ -46,20 +45,13 @@ Argument::Argument(Type *Ty, const Twine
: Value(Ty, Value::ArgumentVal) {
Parent = nullptr;
- // Make sure that we get added to a function
- LeakDetector::addGarbageObject(this);
-
if (Par)
Par->getArgumentList().push_back(this);
setName(Name);
}
void Argument::setParent(Function *parent) {
- if (getParent())
- LeakDetector::addGarbageObject(this);
Parent = parent;
- if (getParent())
- LeakDetector::removeGarbageObject(this);
}
/// getArgNo - Return the index of this formal argument in its containing
@@ -260,9 +252,6 @@ Function::Function(FunctionType *Ty, Lin
if (Ty->getNumParams())
setValueSubclassData(1); // Set the "has lazy arguments" bit.
- // Make sure that we get added to a function
- LeakDetector::addGarbageObject(this);
-
if (ParentModule)
ParentModule->getFunctionList().push_back(this);
@@ -309,11 +298,7 @@ bool Function::arg_empty() const {
}
void Function::setParent(Module *parent) {
- if (getParent())
- LeakDetector::addGarbageObject(this);
Parent = parent;
- if (getParent())
- LeakDetector::removeGarbageObject(this);
}
// dropAllReferences() - This function causes all the subinstructions to "let
Modified: llvm/trunk/lib/IR/Globals.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/IR/Globals.cpp?rev=224703&r1=224702&r2=224703&view=diff
==============================================================================
--- llvm/trunk/lib/IR/Globals.cpp (original)
+++ llvm/trunk/lib/IR/Globals.cpp Mon Dec 22 07:00:36 2014
@@ -18,7 +18,6 @@
#include "llvm/IR/DerivedTypes.h"
#include "llvm/IR/GlobalAlias.h"
#include "llvm/IR/GlobalVariable.h"
-#include "llvm/IR/LeakDetector.h"
#include "llvm/IR/Module.h"
#include "llvm/IR/Operator.h"
#include "llvm/Support/ErrorHandling.h"
@@ -159,8 +158,6 @@ GlobalVariable::GlobalVariable(Type *Ty,
"Initializer should be the same type as the GlobalVariable!");
Op<0>() = InitVal;
}
-
- LeakDetector::addGarbageObject(this);
}
GlobalVariable::GlobalVariable(Module &M, Type *Ty, bool constant,
@@ -180,8 +177,6 @@ GlobalVariable::GlobalVariable(Module &M
Op<0>() = InitVal;
}
- LeakDetector::addGarbageObject(this);
-
if (Before)
Before->getParent()->getGlobalList().insert(Before, this);
else
@@ -189,11 +184,7 @@ GlobalVariable::GlobalVariable(Module &M
}
void GlobalVariable::setParent(Module *parent) {
- if (getParent())
- LeakDetector::addGarbageObject(this);
Parent = parent;
- if (getParent())
- LeakDetector::removeGarbageObject(this);
}
void GlobalVariable::removeFromParent() {
@@ -259,7 +250,6 @@ GlobalAlias::GlobalAlias(Type *Ty, unsig
Module *ParentModule)
: GlobalValue(PointerType::get(Ty, AddressSpace), Value::GlobalAliasVal,
&Op<0>(), 1, Link, Name) {
- LeakDetector::addGarbageObject(this);
Op<0>() = Aliasee;
if (ParentModule)
@@ -296,11 +286,7 @@ GlobalAlias *GlobalAlias::create(const T
}
void GlobalAlias::setParent(Module *parent) {
- if (getParent())
- LeakDetector::addGarbageObject(this);
Parent = parent;
- if (getParent())
- LeakDetector::removeGarbageObject(this);
}
void GlobalAlias::removeFromParent() {
Modified: llvm/trunk/lib/IR/Instruction.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/IR/Instruction.cpp?rev=224703&r1=224702&r2=224703&view=diff
==============================================================================
--- llvm/trunk/lib/IR/Instruction.cpp (original)
+++ llvm/trunk/lib/IR/Instruction.cpp Mon Dec 22 07:00:36 2014
@@ -15,7 +15,6 @@
#include "llvm/IR/CallSite.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/Instructions.h"
-#include "llvm/IR/LeakDetector.h"
#include "llvm/IR/Module.h"
#include "llvm/IR/Operator.h"
#include "llvm/IR/Type.h"
@@ -24,8 +23,6 @@ using namespace llvm;
Instruction::Instruction(Type *ty, unsigned it, Use *Ops, unsigned NumOps,
Instruction *InsertBefore)
: User(ty, Value::InstructionVal + it, Ops, NumOps), Parent(nullptr) {
- // Make sure that we get added to a basicblock
- LeakDetector::addGarbageObject(this);
// If requested, insert this instruction into a basic block...
if (InsertBefore) {
@@ -42,8 +39,6 @@ const DataLayout *Instruction::getDataLa
Instruction::Instruction(Type *ty, unsigned it, Use *Ops, unsigned NumOps,
BasicBlock *InsertAtEnd)
: User(ty, Value::InstructionVal + it, Ops, NumOps), Parent(nullptr) {
- // Make sure that we get added to a basicblock
- LeakDetector::addGarbageObject(this);
// append this instruction into the basic block
assert(InsertAtEnd && "Basic block to append to may not be NULL!");
@@ -60,12 +55,6 @@ Instruction::~Instruction() {
void Instruction::setParent(BasicBlock *P) {
- if (getParent()) {
- if (!P) LeakDetector::addGarbageObject(this);
- } else {
- if (P) LeakDetector::removeGarbageObject(this);
- }
-
Parent = P;
}
Removed: llvm/trunk/lib/IR/LeakDetector.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/IR/LeakDetector.cpp?rev=224702&view=auto
==============================================================================
--- llvm/trunk/lib/IR/LeakDetector.cpp (original)
+++ llvm/trunk/lib/IR/LeakDetector.cpp (removed)
@@ -1,82 +0,0 @@
-//===-- LeakDetector.cpp - Implement LeakDetector interface ---------------===//
-//
-// The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file implements the LeakDetector class.
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/IR/LeakDetector.h"
-#include "LLVMContextImpl.h"
-#include "llvm/ADT/SmallPtrSet.h"
-#include "llvm/IR/Metadata.h"
-#include "llvm/IR/Value.h"
-#include "llvm/Support/Compiler.h"
-#include "llvm/Support/ManagedStatic.h"
-#include "llvm/Support/Mutex.h"
-#include "llvm/Support/Threading.h"
-using namespace llvm;
-
-static ManagedStatic<sys::SmartMutex<true> > ObjectsLock;
-static ManagedStatic<LeakDetectorImpl<void> > Objects;
-
-static void clearGarbage(LLVMContext &Context) {
- Objects->clear();
- Context.pImpl->LLVMObjects.clear();
-}
-
-void LeakDetector::addGarbageObjectImpl(void *Object) {
- sys::SmartScopedLock<true> Lock(*ObjectsLock);
- Objects->addGarbage(Object);
-}
-
-void LeakDetector::addGarbageObjectImpl(const Value *Object) {
- LLVMContextImpl *pImpl = Object->getContext().pImpl;
- pImpl->LLVMObjects.addGarbage(Object);
-}
-
-void LeakDetector::addGarbageObjectImpl(const MDNode *Object) {
- LLVMContextImpl *pImpl = Object->getContext().pImpl;
- pImpl->LLVMMDObjects.addGarbage(Object);
-}
-
-void LeakDetector::removeGarbageObjectImpl(void *Object) {
- sys::SmartScopedLock<true> Lock(*ObjectsLock);
- Objects->removeGarbage(Object);
-}
-
-void LeakDetector::removeGarbageObjectImpl(const Value *Object) {
- LLVMContextImpl *pImpl = Object->getContext().pImpl;
- pImpl->LLVMObjects.removeGarbage(Object);
-}
-
-void LeakDetector::removeGarbageObjectImpl(const MDNode *Object) {
- LLVMContextImpl *pImpl = Object->getContext().pImpl;
- pImpl->LLVMMDObjects.removeGarbage(Object);
-}
-
-void LeakDetector::checkForGarbageImpl(LLVMContext &Context,
- const std::string &Message) {
- LLVMContextImpl *pImpl = Context.pImpl;
- sys::SmartScopedLock<true> Lock(*ObjectsLock);
-
- Objects->setName("GENERIC");
- pImpl->LLVMObjects.setName("LLVM");
- pImpl->LLVMMDObjects.setName("LLVM-MD");
-
- // use non-short-circuit version so that both checks are performed
- if (Objects->hasGarbage(Message) |
- pImpl->LLVMObjects.hasGarbage(Message) |
- pImpl->LLVMMDObjects.hasGarbage(Message))
- errs() << "\nThis is probably because you removed an object, but didn't "
- << "delete it. Please check your code for memory leaks.\n";
-
- // Clear out results so we don't get duplicate warnings on
- // next call...
- clearGarbage(Context);
-}
Modified: llvm/trunk/lib/IR/Metadata.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/IR/Metadata.cpp?rev=224703&r1=224702&r2=224703&view=diff
==============================================================================
--- llvm/trunk/lib/IR/Metadata.cpp (original)
+++ llvm/trunk/lib/IR/Metadata.cpp Mon Dec 22 07:00:36 2014
@@ -22,7 +22,6 @@
#include "llvm/IR/ConstantRange.h"
#include "llvm/IR/Instruction.h"
#include "llvm/IR/LLVMContext.h"
-#include "llvm/IR/LeakDetector.h"
#include "llvm/IR/Module.h"
#include "llvm/IR/ValueHandle.h"
@@ -596,13 +595,11 @@ MDNode *MDNode::getMDNode(LLVMContext &C
MDNodeFwdDecl *MDNode::getTemporary(LLVMContext &Context,
ArrayRef<Metadata *> MDs) {
MDNodeFwdDecl *N = new (MDs.size()) MDNodeFwdDecl(Context, MDs);
- LeakDetector::addGarbageObject(N);
return N;
}
void MDNode::deleteTemporary(MDNode *N) {
assert(isa<MDNodeFwdDecl>(N) && "Expected forward declaration");
- LeakDetector::removeGarbageObject(N);
delete cast<MDNodeFwdDecl>(N);
}
Modified: llvm/trunk/lib/IR/Module.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/IR/Module.cpp?rev=224703&r1=224702&r2=224703&view=diff
==============================================================================
--- llvm/trunk/lib/IR/Module.cpp (original)
+++ llvm/trunk/lib/IR/Module.cpp Mon Dec 22 07:00:36 2014
@@ -22,7 +22,6 @@
#include "llvm/IR/GVMaterializer.h"
#include "llvm/IR/InstrTypes.h"
#include "llvm/IR/LLVMContext.h"
-#include "llvm/IR/LeakDetector.h"
#include "llvm/IR/TypeFinder.h"
#include "llvm/Support/Dwarf.h"
#include "llvm/Support/Path.h"
Modified: llvm/trunk/lib/IR/Value.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/IR/Value.cpp?rev=224703&r1=224702&r2=224703&view=diff
==============================================================================
--- llvm/trunk/lib/IR/Value.cpp (original)
+++ llvm/trunk/lib/IR/Value.cpp Mon Dec 22 07:00:36 2014
@@ -23,7 +23,6 @@
#include "llvm/IR/GetElementPtrTypeIterator.h"
#include "llvm/IR/InstrTypes.h"
#include "llvm/IR/Instructions.h"
-#include "llvm/IR/LeakDetector.h"
#include "llvm/IR/Module.h"
#include "llvm/IR/Operator.h"
#include "llvm/IR/ValueHandle.h"
@@ -84,9 +83,6 @@ Value::~Value() {
// If this value is named, destroy the name. This should not be in a symtab
// at this point.
destroyValueName();
-
- // There should be no uses of this object anymore, remove it.
- LeakDetector::removeGarbageObject(this);
}
void Value::destroyValueName() {
Modified: llvm/trunk/unittests/IR/CMakeLists.txt
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/unittests/IR/CMakeLists.txt?rev=224703&r1=224702&r2=224703&view=diff
==============================================================================
--- llvm/trunk/unittests/IR/CMakeLists.txt (original)
+++ llvm/trunk/unittests/IR/CMakeLists.txt Mon Dec 22 07:00:36 2014
@@ -14,7 +14,6 @@ set(IRSources
DominatorTreeTest.cpp
IRBuilderTest.cpp
InstructionsTest.cpp
- LeakDetectorTest.cpp
LegacyPassManagerTest.cpp
MDBuilderTest.cpp
MetadataTest.cpp
Removed: llvm/trunk/unittests/IR/LeakDetectorTest.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/unittests/IR/LeakDetectorTest.cpp?rev=224702&view=auto
==============================================================================
--- llvm/trunk/unittests/IR/LeakDetectorTest.cpp (original)
+++ llvm/trunk/unittests/IR/LeakDetectorTest.cpp (removed)
@@ -1,31 +0,0 @@
-//===- LeakDetectorTest.cpp -----------------------------------------------===//
-//
-// The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/IR/LeakDetector.h"
-#include "gtest/gtest.h"
-
-using namespace llvm;
-
-namespace {
-
-#ifdef GTEST_HAS_DEATH_TEST
-#ifndef NDEBUG
-TEST(LeakDetector, Death1) {
- LeakDetector::addGarbageObject((void*) 1);
- LeakDetector::addGarbageObject((void*) 2);
-
- EXPECT_DEATH(LeakDetector::addGarbageObject((void*) 1),
- ".*Ts.count\\(o\\) == 0 && \"Object already in set!\"");
- EXPECT_DEATH(LeakDetector::addGarbageObject((void*) 2),
- "Cache != o && \"Object already in set!\"");
-}
-#endif
-#endif
-
-}
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