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Issue 11566011: Use MemoryChunk-based allocation for deoptimization entry code (Closed) Base URL: http://v8.googlecode.com/svn/branches/bleeding_edge/
Patch Set: Created 7 years, 10 months ago
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1 // Copyright 2012 the V8 project authors. All rights reserved. 1 // Copyright 2012 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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197 if (current_allocated < code_range_size / 10) { 197 if (current_allocated < code_range_size / 10) {
198 // Allocate a block. 198 // Allocate a block.
199 // Geometrically distributed sizes, greater than 199 // Geometrically distributed sizes, greater than
200 // Page::kMaxNonCodeHeapObjectSize (which is greater than code page area). 200 // Page::kMaxNonCodeHeapObjectSize (which is greater than code page area).
201 // TODO(gc): instead of using 3 use some contant based on code_range_size 201 // TODO(gc): instead of using 3 use some contant based on code_range_size
202 // kMaxHeapObjectSize. 202 // kMaxHeapObjectSize.
203 size_t requested = 203 size_t requested =
204 (Page::kMaxNonCodeHeapObjectSize << (Pseudorandom() % 3)) + 204 (Page::kMaxNonCodeHeapObjectSize << (Pseudorandom() % 3)) +
205 Pseudorandom() % 5000 + 1; 205 Pseudorandom() % 5000 + 1;
206 size_t allocated = 0; 206 size_t allocated = 0;
207 Address base = code_range->AllocateRawMemory(requested, &allocated); 207 Address base = code_range->AllocateRawMemory(requested,
208 requested,
209 &allocated);
208 CHECK(base != NULL); 210 CHECK(base != NULL);
209 blocks.Add(Block(base, static_cast<int>(allocated))); 211 blocks.Add(Block(base, static_cast<int>(allocated)));
210 current_allocated += static_cast<int>(allocated); 212 current_allocated += static_cast<int>(allocated);
211 total_allocated += static_cast<int>(allocated); 213 total_allocated += static_cast<int>(allocated);
212 } else { 214 } else {
213 // Free a block. 215 // Free a block.
214 int index = Pseudorandom() % blocks.length(); 216 int index = Pseudorandom() % blocks.length();
215 code_range->FreeRawMemory(blocks[index].base, blocks[index].size); 217 code_range->FreeRawMemory(blocks[index].base, blocks[index].size);
216 current_allocated -= blocks[index].size; 218 current_allocated -= blocks[index].size;
217 if (index < blocks.length() - 1) { 219 if (index < blocks.length() - 1) {
218 blocks[index] = blocks.RemoveLast(); 220 blocks[index] = blocks.RemoveLast();
219 } else { 221 } else {
220 blocks.RemoveLast(); 222 blocks.RemoveLast();
221 } 223 }
222 } 224 }
223 } 225 }
224 226
225 code_range->TearDown(); 227 code_range->TearDown();
226 delete code_range; 228 delete code_range;
227 } 229 }
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