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1 /*
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1972
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2 * Copyright (c) 1999, 2010, 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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1972
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26 #ifndef SHARE_VM_SHARK_SHARKMEMORYMANAGER_HPP
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27 #define SHARE_VM_SHARK_SHARKMEMORYMANAGER_HPP
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28
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29 #include "shark/llvmHeaders.hpp"
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30 #include "shark/sharkEntry.hpp"
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31
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32 // SharkMemoryManager wraps the LLVM JIT Memory Manager. We could use
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33 // this to run our own memory allocation policies, but for now all we
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34 // use it for is figuring out where the resulting native code ended up.
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35
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36 class SharkMemoryManager : public llvm::JITMemoryManager {
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37 public:
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38 SharkMemoryManager()
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39 : _mm(llvm::JITMemoryManager::CreateDefaultMemManager()) {}
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40
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41 private:
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42 llvm::JITMemoryManager* _mm;
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43
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44 private:
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45 llvm::JITMemoryManager* mm() const {
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46 return _mm;
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47 }
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48
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49 private:
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50 std::map<const llvm::Function*, SharkEntry*> _entry_map;
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51
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52 public:
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53 void set_entry_for_function(const llvm::Function* function,
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54 SharkEntry* entry) {
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55 _entry_map[function] = entry;
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56 }
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57 SharkEntry* get_entry_for_function(const llvm::Function* function) {
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58 return _entry_map[function];
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59 }
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60
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61 public:
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62 void AllocateGOT();
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63 unsigned char* getGOTBase() const;
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64 unsigned char* allocateStub(const llvm::GlobalValue* F,
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65 unsigned StubSize,
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66 unsigned Alignment);
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67 unsigned char* startFunctionBody(const llvm::Function* F,
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68 uintptr_t& ActualSize);
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69 void endFunctionBody(const llvm::Function* F,
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70 unsigned char* FunctionStart,
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71 unsigned char* FunctionEnd);
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72
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7195
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73 void *getPointerToNamedFunction(const std::string &Name, bool AbortOnFailure = true);
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74 void setPoisonMemory(bool);
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75 uint8_t* allocateGlobal(uintptr_t, unsigned int);
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76 void setMemoryWritable();
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77 void setMemoryExecutable();
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78 void deallocateFunctionBody(void *ptr);
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79 unsigned char *allocateSpace(intptr_t Size,
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80 unsigned int Alignment);
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81
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82 #if SHARK_LLVM_VERSION <= 32
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83 uint8_t *allocateCodeSection(uintptr_t Size, unsigned Alignment, unsigned SectionID);
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84 uint8_t *allocateDataSection(uintptr_t Size, unsigned Alignment, unsigned SectionID);
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85 unsigned char* startExceptionTable(const llvm::Function* F,
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86 uintptr_t& ActualSize);
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87 void deallocateExceptionTable(void *ptr);
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88 void endExceptionTable(const llvm::Function* F,
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89 unsigned char* TableStart,
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90 unsigned char* TableEnd,
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91 unsigned char* FrameRegister);
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92 #else
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93 uint8_t *allocateCodeSection(uintptr_t Size, unsigned Alignment, unsigned SectionID, llvm::StringRef SectionName);
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94 uint8_t *allocateDataSection(uintptr_t Size, unsigned Alignment, unsigned SectionID, llvm::StringRef SectionName, bool IsReadOnly);
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95 bool finalizeMemory(std::string *ErrMsg = 0);
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96 #endif
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97
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98 };
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99
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100 #endif // SHARE_VM_SHARK_SHARKMEMORYMANAGER_HPP
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