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annotate tools/lli/RemoteJITUtils.h @ 148:63bd29f05246

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merged
author Shinji KONO <kono@ie.u-ryukyu.ac.jp>
date Wed, 14 Aug 2019 19:46:37 +0900
parents c2174574ed3a
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 //===-- RemoteJITUtils.h - Utilities for remote-JITing with LLI -*- C++ -*-===//
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2 //
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3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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4 // See https://llvm.org/LICENSE.txt for license information.
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5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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6 //
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7 //===----------------------------------------------------------------------===//
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8 //
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9 // Utilities for remote-JITing with LLI.
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10 //
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11 //===----------------------------------------------------------------------===//
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12
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13 #ifndef LLVM_TOOLS_LLI_REMOTEJITUTILS_H
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14 #define LLVM_TOOLS_LLI_REMOTEJITUTILS_H
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15
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16 #include "llvm/ExecutionEngine/Orc/RawByteChannel.h"
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17 #include "llvm/ExecutionEngine/RTDyldMemoryManager.h"
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18 #include <mutex>
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19
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20 #if !defined(_MSC_VER) && !defined(__MINGW32__)
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21 #include <unistd.h>
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22 #else
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23 #include <io.h>
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24 #endif
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25
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26 /// RPC channel that reads from and writes from file descriptors.
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27 class FDRawChannel final : public llvm::orc::rpc::RawByteChannel {
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28 public:
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29 FDRawChannel(int InFD, int OutFD) : InFD(InFD), OutFD(OutFD) {}
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30
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31 llvm::Error readBytes(char *Dst, unsigned Size) override {
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32 assert(Dst && "Attempt to read into null.");
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33 ssize_t Completed = 0;
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34 while (Completed < static_cast<ssize_t>(Size)) {
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35 ssize_t Read = ::read(InFD, Dst + Completed, Size - Completed);
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36 if (Read <= 0) {
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37 auto ErrNo = errno;
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38 if (ErrNo == EAGAIN || ErrNo == EINTR)
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39 continue;
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40 else
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41 return llvm::errorCodeToError(
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42 std::error_code(errno, std::generic_category()));
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43 }
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44 Completed += Read;
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45 }
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46 return llvm::Error::success();
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47 }
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48
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49 llvm::Error appendBytes(const char *Src, unsigned Size) override {
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50 assert(Src && "Attempt to append from null.");
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51 ssize_t Completed = 0;
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52 while (Completed < static_cast<ssize_t>(Size)) {
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53 ssize_t Written = ::write(OutFD, Src + Completed, Size - Completed);
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54 if (Written < 0) {
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55 auto ErrNo = errno;
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56 if (ErrNo == EAGAIN || ErrNo == EINTR)
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57 continue;
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58 else
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59 return llvm::errorCodeToError(
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60 std::error_code(errno, std::generic_category()));
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61 }
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62 Completed += Written;
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63 }
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64 return llvm::Error::success();
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65 }
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66
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67 llvm::Error send() override { return llvm::Error::success(); }
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68
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69 private:
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70 int InFD, OutFD;
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71 };
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72
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73 // launch the remote process (see lli.cpp) and return a channel to it.
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74 std::unique_ptr<FDRawChannel> launchRemote();
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75
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76 namespace llvm {
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77
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78 // ForwardingMM - Adapter to connect MCJIT to Orc's Remote
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79 // memory manager.
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80 class ForwardingMemoryManager : public llvm::RTDyldMemoryManager {
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81 public:
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82 void setMemMgr(std::unique_ptr<RuntimeDyld::MemoryManager> MemMgr) {
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83 this->MemMgr = std::move(MemMgr);
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84 }
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85
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86 void setResolver(std::shared_ptr<LegacyJITSymbolResolver> Resolver) {
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87 this->Resolver = std::move(Resolver);
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88 }
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89
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90 uint8_t *allocateCodeSection(uintptr_t Size, unsigned Alignment,
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91 unsigned SectionID,
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92 StringRef SectionName) override {
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93 return MemMgr->allocateCodeSection(Size, Alignment, SectionID, SectionName);
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94 }
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95
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96 uint8_t *allocateDataSection(uintptr_t Size, unsigned Alignment,
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97 unsigned SectionID, StringRef SectionName,
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98 bool IsReadOnly) override {
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99 return MemMgr->allocateDataSection(Size, Alignment, SectionID, SectionName,
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100 IsReadOnly);
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101 }
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102
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103 void reserveAllocationSpace(uintptr_t CodeSize, uint32_t CodeAlign,
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104 uintptr_t RODataSize, uint32_t RODataAlign,
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105 uintptr_t RWDataSize,
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106 uint32_t RWDataAlign) override {
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107 MemMgr->reserveAllocationSpace(CodeSize, CodeAlign, RODataSize, RODataAlign,
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108 RWDataSize, RWDataAlign);
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109 }
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110
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111 bool needsToReserveAllocationSpace() override {
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112 return MemMgr->needsToReserveAllocationSpace();
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113 }
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114
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115 void registerEHFrames(uint8_t *Addr, uint64_t LoadAddr,
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116 size_t Size) override {
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117 MemMgr->registerEHFrames(Addr, LoadAddr, Size);
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118 }
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119
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120 void deregisterEHFrames() override {
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121 MemMgr->deregisterEHFrames();
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122 }
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123
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124 bool finalizeMemory(std::string *ErrMsg = nullptr) override {
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125 return MemMgr->finalizeMemory(ErrMsg);
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126 }
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127
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128 void notifyObjectLoaded(RuntimeDyld &RTDyld,
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129 const object::ObjectFile &Obj) override {
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130 MemMgr->notifyObjectLoaded(RTDyld, Obj);
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131 }
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132
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133 // Don't hide the sibling notifyObjectLoaded from RTDyldMemoryManager.
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134 using RTDyldMemoryManager::notifyObjectLoaded;
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135
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136 JITSymbol findSymbol(const std::string &Name) override {
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137 return Resolver->findSymbol(Name);
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138 }
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139
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140 JITSymbol
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141 findSymbolInLogicalDylib(const std::string &Name) override {
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142 return Resolver->findSymbolInLogicalDylib(Name);
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143 }
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144
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145 private:
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146 std::unique_ptr<RuntimeDyld::MemoryManager> MemMgr;
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147 std::shared_ptr<LegacyJITSymbolResolver> Resolver;
100
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148 };
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149 }
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150
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151 #endif