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Fix memory leak in StringRef::edit_distance(). 'Allocated' could be leaked on an early return.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118370 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Ted Kremenek 2010-11-07 06:09:02 +00:00
parent 7944988c25
commit 13302ec089
1 changed files with 6 additions and 5 deletions
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11
lib/Support/StringRef.cpp
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@ -9,6 +9,7 @@
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/APInt.h"
#include "llvm/ADT/OwningPtr.h"
#include <bitset>
using namespace llvm;
@ -84,10 +85,12 @@ unsigned StringRef::edit_distance(llvm::StringRef Other,
const unsigned SmallBufferSize = 64;
unsigned SmallBuffer[SmallBufferSize];
unsigned *Allocated = 0;
llvm::OwningArrayPtr<unsigned> Allocated;
unsigned *previous = SmallBuffer;
if (2*(n + 1) > SmallBufferSize)
Allocated = previous = new unsigned [2*(n+1)];
if (2*(n + 1) > SmallBufferSize) {
previous = new unsigned [2*(n+1)];
Allocated.reset(previous);
}
unsigned *current = previous + (n + 1);
for (unsigned i = 0; i <= n; ++i)
@ -118,8 +121,6 @@ unsigned StringRef::edit_distance(llvm::StringRef Other,
}
unsigned Result = previous[n];
delete [] Allocated;
return Result;
}