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1692
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1 /*
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2 * Copyright (c) 1999, 2007, Oracle and/or its affiliates. All rights reserved.
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3 * Copyright 2009 Red Hat, Inc.
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4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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5 *
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6 * This code is free software; you can redistribute it and/or modify it
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7 * under the terms of the GNU General Public License version 2 only, as
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8 * published by the Free Software Foundation.
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9 *
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10 * This code is distributed in the hope that it will be useful, but WITHOUT
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11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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13 * version 2 for more details (a copy is included in the LICENSE file that
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14 * accompanied this code).
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15 *
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16 * You should have received a copy of the GNU General Public License version
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17 * 2 along with this work; if not, write to the Free Software Foundation,
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18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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19 *
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20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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21 * or visit www.oracle.com if you need additional information or have any
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22 * questions.
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23 *
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24 */
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25
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26 // SharkMemoryManager wraps the LLVM JIT Memory Manager. We could use
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27 // this to run our own memory allocation policies, but for now all we
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28 // use it for is figuring out where the resulting native code ended up.
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29
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30 class SharkMemoryManager : public llvm::JITMemoryManager {
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31 public:
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32 SharkMemoryManager()
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33 : _mm(llvm::JITMemoryManager::CreateDefaultMemManager()) {}
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34
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35 private:
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36 llvm::JITMemoryManager* _mm;
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37
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38 private:
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39 llvm::JITMemoryManager* mm() const {
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40 return _mm;
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41 }
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42
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43 private:
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44 std::map<const llvm::Function*, SharkEntry*> _entry_map;
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45
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46 public:
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47 void set_entry_for_function(const llvm::Function* function,
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48 SharkEntry* entry) {
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49 _entry_map[function] = entry;
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50 }
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51 SharkEntry* get_entry_for_function(const llvm::Function* function) {
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52 return _entry_map[function];
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53 }
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54
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55 public:
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56 void AllocateGOT();
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57 unsigned char* getGOTBase() const;
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58 unsigned char* allocateStub(const llvm::GlobalValue* F,
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59 unsigned StubSize,
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60 unsigned Alignment);
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61 unsigned char* startFunctionBody(const llvm::Function* F,
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62 uintptr_t& ActualSize);
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63 void endFunctionBody(const llvm::Function* F,
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64 unsigned char* FunctionStart,
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65 unsigned char* FunctionEnd);
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66 unsigned char* startExceptionTable(const llvm::Function* F,
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67 uintptr_t& ActualSize);
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68 void endExceptionTable(const llvm::Function* F,
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69 unsigned char* TableStart,
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70 unsigned char* TableEnd,
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71 unsigned char* FrameRegister);
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72 #if SHARK_LLVM_VERSION < 27
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73 void* getDlsymTable() const;
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74 void SetDlsymTable(void *ptr);
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75 #endif
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76 void setPoisonMemory(bool);
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77 uint8_t* allocateGlobal(uintptr_t, unsigned int);
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78 void setMemoryWritable();
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79 void setMemoryExecutable();
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80 #if SHARK_LLVM_VERSION >= 27
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81 void deallocateExceptionTable(void *ptr);
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82 void deallocateFunctionBody(void *ptr);
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83 #else
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84 void deallocateMemForFunction(const llvm::Function* F);
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85 #endif
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86 unsigned char *allocateSpace(intptr_t Size,
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87 unsigned int Alignment);
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88 };
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