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1 // Copyright 2007-2008 the V8 project authors. All rights reserved. | 1 // Copyright 2007-2008 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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137 static_cast<PropertyAttributes>(0)); | 137 static_cast<PropertyAttributes>(0)); |
138 map->set_instance_descriptors(*instance_descriptors); | 138 map->set_instance_descriptors(*instance_descriptors); |
139 // Add the Foo constructor the global object. | 139 // Add the Foo constructor the global object. |
140 env->Global()->Set(v8::String::New("Foo"), v8::Utils::ToLocal(function)); | 140 env->Global()->Set(v8::String::New("Foo"), v8::Utils::ToLocal(function)); |
141 // Call the accessor through JavaScript. | 141 // Call the accessor through JavaScript. |
142 v8::Handle<v8::Value> result = | 142 v8::Handle<v8::Value> result = |
143 v8::Script::Compile(v8::String::New("(new Foo).get"))->Run(); | 143 v8::Script::Compile(v8::String::New("(new Foo).get"))->Run(); |
144 CHECK_EQ(42, result->Int32Value()); | 144 CHECK_EQ(42, result->Int32Value()); |
145 env->Exit(); | 145 env->Exit(); |
146 } | 146 } |
147 | |
148 | |
149 // CodeRange test. | |
150 // Tests memory management in a CodeRange by allocating and freeing blocks, | |
151 // using a pseudorandom generator to choose block sizes geometrically | |
152 // distributed between 2 * Page::kPageSize and 2^5 + 1 * Page::kPageSize. | |
153 // Ensure that the freed chunks are collected and reused by allocating (in | |
154 // total) more than the size of the CodeRange. | |
155 | |
156 // This pseudorandom generator does not need to be particularly good. | |
157 // Use the lower half of the V8::Random() generator. | |
158 unsigned int Pseudorandom() { | |
159 static uint32_t lo = 2345; | |
160 lo = 18273 * (lo & 0xFFFF) + (lo >> 16); // Provably not 0. | |
161 return lo & 0xFFFF; | |
162 } | |
163 | |
164 | |
165 // Plain old data class. Represents a block of allocated memory. | |
166 class Block { | |
167 public: | |
168 Block(void* base_arg, int size_arg) | |
169 : base(base_arg), size(size_arg) {} | |
170 | |
171 void *base; | |
172 int size; | |
173 }; | |
174 | |
175 | |
176 TEST(CodeRange) { | |
177 const int code_range_size = 16*MB; | |
178 CodeRange::Setup(code_range_size); | |
179 int current_allocated = 0; | |
180 int total_allocated = 0; | |
181 List<Block> blocks(1000); | |
182 | |
183 while (total_allocated < 5 * code_range_size) { | |
184 if (current_allocated < code_range_size / 10) { | |
185 // Allocate a block. | |
186 // Geometrically distributed sizes, greater than Page::kPageSize. | |
187 size_t requested = (Page::kPageSize << (Pseudorandom() % 6)) + | |
188 Pseudorandom() % 5000 + 1; | |
189 size_t allocated = 0; | |
190 void* base = CodeRange::AllocateRawMemory(requested, &allocated); | |
191 blocks.Add(Block(base, allocated)); | |
192 current_allocated += allocated; | |
193 total_allocated += allocated; | |
194 } else { | |
195 // Free a block. | |
196 int index = Pseudorandom() % blocks.length(); | |
197 CodeRange::FreeRawMemory(blocks[index].base, blocks[index].size); | |
198 current_allocated -= blocks[index].size; | |
199 if (index < blocks.length() - 1) { | |
200 blocks[index] = blocks.RemoveLast(); | |
201 } else { | |
202 blocks.RemoveLast(); | |
203 } | |
204 } | |
205 } | |
206 | |
207 CodeRange::TearDown(); | |
208 } | |
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