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Side by Side Diff: sky/engine/wtf/AddressSpaceRandomization.cpp

Issue 746023002: Make absolute and sort all Sky headers (Closed) Base URL: git@github.com:domokit/mojo.git@master
Patch Set: Created 6 years, 1 month ago
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1 // Copyright 2014 The Chromium Authors. All rights reserved. 1 // Copyright 2014 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 #include "config.h" 5 #include "sky/engine/config.h"
6 #include "wtf/AddressSpaceRandomization.h" 6 #include "sky/engine/wtf/AddressSpaceRandomization.h"
7 7
8 #include "wtf/PageAllocator.h" 8 #include "sky/engine/wtf/PageAllocator.h"
9 #include "wtf/ProcessID.h" 9 #include "sky/engine/wtf/ProcessID.h"
10 #include "wtf/SpinLock.h" 10 #include "sky/engine/wtf/SpinLock.h"
11 11
12 namespace WTF { 12 namespace WTF {
13 13
14 namespace { 14 namespace {
15 15
16 // This is the same PRNG as used by tcmalloc for mapping address randomness; 16 // This is the same PRNG as used by tcmalloc for mapping address randomness;
17 // see http://burtleburtle.net/bob/rand/smallprng.html 17 // see http://burtleburtle.net/bob/rand/smallprng.html
18 struct ranctx { 18 struct ranctx {
19 int lock; 19 int lock;
20 bool initialized; 20 bool initialized;
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90 // This is a good range on Windows, Linux and Mac. 90 // This is a good range on Windows, Linux and Mac.
91 // Allocates in the 0.5-1.5GB region. 91 // Allocates in the 0.5-1.5GB region.
92 random &= 0x3fffffff; 92 random &= 0x3fffffff;
93 random += 0x20000000; 93 random += 0x20000000;
94 #endif // CPU(X86_64) 94 #endif // CPU(X86_64)
95 random &= kPageAllocationGranularityBaseMask; 95 random &= kPageAllocationGranularityBaseMask;
96 return reinterpret_cast<void*>(random); 96 return reinterpret_cast<void*>(random);
97 } 97 }
98 98
99 } 99 }
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