yangguo@chromium.org | 659ceec | 2012-01-26 07:37:54 +0000 | [diff] [blame] | 1 | // Copyright 2012 the V8 project authors. All rights reserved. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2 | // Redistribution and use in source and binary forms, with or without |
| 3 | // modification, are permitted provided that the following conditions are |
| 4 | // met: |
| 5 | // |
| 6 | // * Redistributions of source code must retain the above copyright |
| 7 | // notice, this list of conditions and the following disclaimer. |
| 8 | // * Redistributions in binary form must reproduce the above |
| 9 | // copyright notice, this list of conditions and the following |
| 10 | // disclaimer in the documentation and/or other materials provided |
| 11 | // with the distribution. |
| 12 | // * Neither the name of Google Inc. nor the names of its |
| 13 | // contributors may be used to endorse or promote products derived |
| 14 | // from this software without specific prior written permission. |
| 15 | // |
| 16 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | |
| 28 | #ifndef V8_ALLOCATION_H_ |
| 29 | #define V8_ALLOCATION_H_ |
| 30 | |
ager@chromium.org | 5f0c45f | 2010-12-17 08:51:21 +0000 | [diff] [blame] | 31 | #include "globals.h" |
| 32 | |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 33 | namespace v8 { |
| 34 | namespace internal { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 35 | |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 36 | // Called when allocation routines fail to allocate. |
| 37 | // This function should not return, but should terminate the current |
| 38 | // processing. |
| 39 | void FatalProcessOutOfMemory(const char* message); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 40 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 41 | // Superclass for classes managed with new & delete. |
| 42 | class Malloced { |
| 43 | public: |
| 44 | void* operator new(size_t size) { return New(size); } |
| 45 | void operator delete(void* p) { Delete(p); } |
| 46 | |
| 47 | static void FatalProcessOutOfMemory(); |
| 48 | static void* New(size_t size); |
| 49 | static void Delete(void* p); |
| 50 | }; |
| 51 | |
| 52 | |
| 53 | // A macro is used for defining the base class used for embedded instances. |
| 54 | // The reason is some compilers allocate a minimum of one word for the |
| 55 | // superclass. The macro prevents the use of new & delete in debug mode. |
| 56 | // In release mode we are not willing to pay this overhead. |
| 57 | |
| 58 | #ifdef DEBUG |
| 59 | // Superclass for classes with instances allocated inside stack |
| 60 | // activations or inside other objects. |
| 61 | class Embedded { |
| 62 | public: |
| 63 | void* operator new(size_t size); |
| 64 | void operator delete(void* p); |
| 65 | }; |
| 66 | #define BASE_EMBEDDED : public Embedded |
| 67 | #else |
| 68 | #define BASE_EMBEDDED |
| 69 | #endif |
| 70 | |
| 71 | |
| 72 | // Superclass for classes only using statics. |
| 73 | class AllStatic { |
| 74 | #ifdef DEBUG |
| 75 | public: |
| 76 | void* operator new(size_t size); |
| 77 | void operator delete(void* p); |
| 78 | #endif |
| 79 | }; |
| 80 | |
| 81 | |
| 82 | template <typename T> |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 83 | T* NewArray(size_t size) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 84 | T* result = new T[size]; |
| 85 | if (result == NULL) Malloced::FatalProcessOutOfMemory(); |
| 86 | return result; |
| 87 | } |
| 88 | |
| 89 | |
| 90 | template <typename T> |
mstarzinger@chromium.org | 1b3afd1 | 2011-11-29 14:28:56 +0000 | [diff] [blame] | 91 | void DeleteArray(T* array) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 92 | delete[] array; |
| 93 | } |
| 94 | |
| 95 | |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 96 | // The normal strdup functions use malloc. These versions of StrDup |
| 97 | // and StrNDup uses new and calls the FatalProcessOutOfMemory handler |
| 98 | // if allocation fails. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 99 | char* StrDup(const char* str); |
ager@chromium.org | 01beca7 | 2009-11-24 14:29:16 +0000 | [diff] [blame] | 100 | char* StrNDup(const char* str, int n); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 101 | |
| 102 | |
| 103 | // Allocation policy for allocating in the C free store using malloc |
| 104 | // and free. Used as the default policy for lists. |
| 105 | class FreeStoreAllocationPolicy { |
| 106 | public: |
rossberg@chromium.org | 400388e | 2012-06-06 09:29:22 +0000 | [diff] [blame] | 107 | INLINE(void* New(size_t size)) { return Malloced::New(size); } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 108 | INLINE(static void Delete(void* p)) { Malloced::Delete(p); } |
| 109 | }; |
| 110 | |
| 111 | |
| 112 | // Allocation policy for allocating in preallocated space. |
| 113 | // Used as an allocation policy for ScopeInfo when generating |
| 114 | // stack traces. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 115 | class PreallocatedStorage { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 116 | public: |
| 117 | explicit PreallocatedStorage(size_t size); |
| 118 | size_t size() { return size_; } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 119 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 120 | private: |
| 121 | size_t size_; |
| 122 | PreallocatedStorage* previous_; |
| 123 | PreallocatedStorage* next_; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 124 | |
| 125 | void LinkTo(PreallocatedStorage* other); |
| 126 | void Unlink(); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 127 | |
| 128 | friend class Isolate; |
| 129 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 130 | DISALLOW_IMPLICIT_CONSTRUCTORS(PreallocatedStorage); |
| 131 | }; |
| 132 | |
| 133 | |
rossberg@chromium.org | 400388e | 2012-06-06 09:29:22 +0000 | [diff] [blame] | 134 | struct PreallocatedStorageAllocationPolicy { |
| 135 | INLINE(void* New(size_t size)); |
| 136 | INLINE(static void Delete(void* ptr)); |
| 137 | }; |
| 138 | |
| 139 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 140 | } } // namespace v8::internal |
| 141 | |
| 142 | #endif // V8_ALLOCATION_H_ |