allocators: split allocators and pagelocker

Pagelocker is only needed for secure (usually wallet) operations, so don't make
the zero-after-free allocator depend on it.

src/Makefile.am

@@ -72,7 +72,6 @@ endif
 BITCOIN_CORE_H = \
   addrman.h \
   alert.h \
-  allocators.h \
   amount.h \
   arith_uint256.h \
   base58.h \
@@ -123,7 +122,10 @@ BITCOIN_CORE_H = \
   script/standard.h \
   serialize.h \
   streams.h \
+  support/allocators/secure.h \
+  support/allocators/zeroafterfree.h \
   support/cleanse.h \
+  support/pagelocker.h \
   sync.h \
   threadsafety.h \
   timedata.h \
@@ -233,7 +235,6 @@ univalue_libbitcoin_univalue_a_SOURCES = \
 # common: shared between bitcoind, and bitcoin-qt and non-server tools
 libbitcoin_common_a_CPPFLAGS = $(BITCOIN_INCLUDES)
 libbitcoin_common_a_SOURCES = \
-  allocators.cpp \
   arith_uint256.cpp \
   amount.cpp \
   base58.cpp \
@@ -264,6 +265,7 @@ libbitcoin_common_a_SOURCES = \
 # backward-compatibility objects and their sanity checks are linked.
 libbitcoin_util_a_CPPFLAGS = $(BITCOIN_INCLUDES)
 libbitcoin_util_a_SOURCES = \
+  support/pagelocker.cpp \
   chainparamsbase.cpp \
   clientversion.cpp \
   compat/glibc_sanity.cpp \

src/base58.h

@@ -19,6 +19,7 @@
 #include "pubkey.h"
 #include "script/script.h"
 #include "script/standard.h"
+#include "support/allocators/zeroafterfree.h"
 
 #include <string>
 #include <vector>

src/crypter.h

@@ -5,9 +5,9 @@
 #ifndef BITCOIN_CRYPTER_H
 #define BITCOIN_CRYPTER_H
 
-#include "allocators.h"
 #include "keystore.h"
 #include "serialize.h"
+#include "support/allocators/secure.h"
 
 class uint256;
 

src/key.h

@@ -6,8 +6,8 @@
 #ifndef BITCOIN_KEY_H
 #define BITCOIN_KEY_H
 
-#include "allocators.h"
 #include "serialize.h"
+#include "support/allocators/secure.h"
 #include "uint256.h"
 
 #include <stdexcept>

src/qt/askpassphrasedialog.cpp

@@ -8,7 +8,7 @@
 #include "guiconstants.h"
 #include "walletmodel.h"
 
-#include "allocators.h"
+#include "support/allocators/secure.h"
 
 #include <QKeyEvent>
 #include <QMessageBox>

src/qt/walletmodel.h

@@ -8,7 +8,7 @@
 #include "paymentrequestplus.h"
 #include "walletmodeltransaction.h"
 
-#include "allocators.h" /* for SecureString */
+#include "support/allocators/secure.h"
 
 #include <map>
 #include <vector>

src/streams.h

@@ -6,7 +6,7 @@
 #ifndef BITCOIN_STREAMS_H
 #define BITCOIN_STREAMS_H
 
-#include "allocators.h"
+#include "support/allocators/zeroafterfree.h"
 #include "serialize.h"
 
 #include <algorithm>

src/support/allocators/secure.h

@@ -0,0 +1,62 @@
+// Copyright (c) 2009-2010 Satoshi Nakamoto
+// Copyright (c) 2009-2013 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#ifndef BITCOIN_ALLOCATORS_SECURE_H
+#define BITCOIN_ALLOCATORS_SECURE_H
+
+#include "support/pagelocker.h"
+
+#include <string>
+
+//
+// Allocator that locks its contents from being paged
+// out of memory and clears its contents before deletion.
+//
+template <typename T>
+struct secure_allocator : public std::allocator<T> {
+    // MSVC8 default copy constructor is broken
+    typedef std::allocator<T> base;
+    typedef typename base::size_type size_type;
+    typedef typename base::difference_type difference_type;
+    typedef typename base::pointer pointer;
+    typedef typename base::const_pointer const_pointer;
+    typedef typename base::reference reference;
+    typedef typename base::const_reference const_reference;
+    typedef typename base::value_type value_type;
+    secure_allocator() throw() {}
+    secure_allocator(const secure_allocator& a) throw() : base(a) {}
+    template <typename U>
+    secure_allocator(const secure_allocator<U>& a) throw() : base(a)
+    {
+    }
+    ~secure_allocator() throw() {}
+    template <typename _Other>
+    struct rebind {
+        typedef secure_allocator<_Other> other;
+    };
+
+    T* allocate(std::size_t n, const void* hint = 0)
+    {
+        T* p;
+        p = std::allocator<T>::allocate(n, hint);
+        if (p != NULL)
+            LockedPageManager::Instance().LockRange(p, sizeof(T) * n);
+        return p;
+    }
+
+    void deallocate(T* p, std::size_t n)
+    {
+        if (p != NULL) {
+            memory_cleanse(p, sizeof(T) * n);
+            LockedPageManager::Instance().UnlockRange(p, sizeof(T) * n);
+        }
+        std::allocator<T>::deallocate(p, n);
+    }
+};
+
+// This is exactly like std::string, but with a custom allocator.
+typedef std::basic_string<char, std::char_traits<char>, secure_allocator<char> > SecureString;
+
+#endif // BITCOIN_ALLOCATORS_SECURE_H

src/support/allocators/zeroafterfree.h

@@ -0,0 +1,48 @@
+// Copyright (c) 2009-2010 Satoshi Nakamoto
+// Copyright (c) 2009-2013 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#ifndef BITCOIN_ALLOCATORS_ZEROAFTERFREE_H
+#define BITCOIN_ALLOCATORS_ZEROAFTERFREE_H
+
+#include "support/cleanse.h"
+
+#include <memory>
+#include <vector>
+
+template <typename T>
+struct zero_after_free_allocator : public std::allocator<T> {
+    // MSVC8 default copy constructor is broken
+    typedef std::allocator<T> base;
+    typedef typename base::size_type size_type;
+    typedef typename base::difference_type difference_type;
+    typedef typename base::pointer pointer;
+    typedef typename base::const_pointer const_pointer;
+    typedef typename base::reference reference;
+    typedef typename base::const_reference const_reference;
+    typedef typename base::value_type value_type;
+    zero_after_free_allocator() throw() {}
+    zero_after_free_allocator(const zero_after_free_allocator& a) throw() : base(a) {}
+    template <typename U>
+    zero_after_free_allocator(const zero_after_free_allocator<U>& a) throw() : base(a)
+    {
+    }
+    ~zero_after_free_allocator() throw() {}
+    template <typename _Other>
+    struct rebind {
+        typedef zero_after_free_allocator<_Other> other;
+    };
+
+    void deallocate(T* p, std::size_t n)
+    {
+        if (p != NULL)
+            memory_cleanse(p, sizeof(T) * n);
+        std::allocator<T>::deallocate(p, n);
+    }
+};
+
+// Byte-vector that clears its contents before deletion.
+typedef std::vector<char, zero_after_free_allocator<char> > CSerializeData;
+
+#endif // BITCOIN_ALLOCATORS_ZEROAFTERFREE_H

src/support/pagelocker.cpp

@@ -2,7 +2,11 @@
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
-#include "allocators.h"
+#include "support/pagelocker.h"
+
+#if defined(HAVE_CONFIG_H)
+#include "config/bitcoin-config.h"
+#endif
 
 #ifdef WIN32
 #ifdef _WIN32_WINNT

src/support/pagelocker.h

@@ -3,15 +3,12 @@
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
-#ifndef BITCOIN_ALLOCATORS_H
-#define BITCOIN_ALLOCATORS_H
+#ifndef BITCOIN_ALLOCATORS_PAGELOCKER_H
+#define BITCOIN_ALLOCATORS_PAGELOCKER_H
 
 #include "support/cleanse.h"
 
 #include <map>
-#include <string>
-#include <string.h>
-#include <vector>
 
 #include <boost/thread/mutex.hpp>
 #include <boost/thread/once.hpp>
@@ -178,91 +175,4 @@ void UnlockObject(const T& t)
     LockedPageManager::Instance().UnlockRange((void*)(&t), sizeof(T));
 }
 
-//
-// Allocator that locks its contents from being paged
-// out of memory and clears its contents before deletion.
-//
-template <typename T>
-struct secure_allocator : public std::allocator<T> {
-    // MSVC8 default copy constructor is broken
-    typedef std::allocator<T> base;
-    typedef typename base::size_type size_type;
-    typedef typename base::difference_type difference_type;
-    typedef typename base::pointer pointer;
-    typedef typename base::const_pointer const_pointer;
-    typedef typename base::reference reference;
-    typedef typename base::const_reference const_reference;
-    typedef typename base::value_type value_type;
-    secure_allocator() throw() {}
-    secure_allocator(const secure_allocator& a) throw() : base(a) {}
-    template <typename U>
-    secure_allocator(const secure_allocator<U>& a) throw() : base(a)
-    {
-    }
-    ~secure_allocator() throw() {}
-    template <typename _Other>
-    struct rebind {
-        typedef secure_allocator<_Other> other;
-    };
-
-    T* allocate(std::size_t n, const void* hint = 0)
-    {
-        T* p;
-        p = std::allocator<T>::allocate(n, hint);
-        if (p != NULL)
-            LockedPageManager::Instance().LockRange(p, sizeof(T) * n);
-        return p;
-    }
-
-    void deallocate(T* p, std::size_t n)
-    {
-        if (p != NULL) {
-            memory_cleanse(p, sizeof(T) * n);
-            LockedPageManager::Instance().UnlockRange(p, sizeof(T) * n);
-        }
-        std::allocator<T>::deallocate(p, n);
-    }
-};
-
-
-//
-// Allocator that clears its contents before deletion.
-//
-template <typename T>
-struct zero_after_free_allocator : public std::allocator<T> {
-    // MSVC8 default copy constructor is broken
-    typedef std::allocator<T> base;
-    typedef typename base::size_type size_type;
-    typedef typename base::difference_type difference_type;
-    typedef typename base::pointer pointer;
-    typedef typename base::const_pointer const_pointer;
-    typedef typename base::reference reference;
-    typedef typename base::const_reference const_reference;
-    typedef typename base::value_type value_type;
-    zero_after_free_allocator() throw() {}
-    zero_after_free_allocator(const zero_after_free_allocator& a) throw() : base(a) {}
-    template <typename U>
-    zero_after_free_allocator(const zero_after_free_allocator<U>& a) throw() : base(a)
-    {
-    }
-    ~zero_after_free_allocator() throw() {}
-    template <typename _Other>
-    struct rebind {
-        typedef zero_after_free_allocator<_Other> other;
-    };
-
-    void deallocate(T* p, std::size_t n)
-    {
-        if (p != NULL)
-            memory_cleanse(p, sizeof(T) * n);
-        std::allocator<T>::deallocate(p, n);
-    }
-};
-
-// This is exactly like std::string, but with a custom allocator.
-typedef std::basic_string<char, std::char_traits<char>, secure_allocator<char> > SecureString;
-
-// Byte-vector that clears its contents before deletion.
-typedef std::vector<char, zero_after_free_allocator<char> > CSerializeData;
-
-#endif // BITCOIN_ALLOCATORS_H
+#endif // BITCOIN_ALLOCATORS_PAGELOCKER_H

src/test/allocator_tests.cpp

@@ -4,7 +4,7 @@
 
 #include "util.h"
 
-#include "allocators.h"
+#include "support/allocators/secure.h"
 #include "test/test_bitcoin.h"
 
 #include <boost/test/unit_test.hpp>