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