1 //===-- IntelJITEventListener.cpp - Tell Intel profiler about JITed code --===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines a JITEventListener object to tell Intel(R) VTune(TM)
11 // Amplifier XE 2011 about JITted functions.
13 //===----------------------------------------------------------------------===//
15 #include "IntelJITEventsWrapper.h"
16 #include "llvm-c/ExecutionEngine.h"
17 #include "llvm/ADT/DenseMap.h"
18 #include "llvm/CodeGen/MachineFunction.h"
19 #include "llvm/Config/config.h"
20 #include "llvm/DebugInfo/DIContext.h"
21 #include "llvm/DebugInfo/DWARF/DWARFContext.h"
22 #include "llvm/ExecutionEngine/JITEventListener.h"
23 #include "llvm/IR/DebugInfo.h"
24 #include "llvm/IR/Function.h"
25 #include "llvm/IR/Metadata.h"
26 #include "llvm/IR/ValueHandle.h"
27 #include "llvm/Object/ObjectFile.h"
28 #include "llvm/Object/SymbolSize.h"
29 #include "llvm/Support/Debug.h"
30 #include "llvm/Support/Errno.h"
31 #include "llvm/Support/raw_ostream.h"
34 using namespace llvm::object;
36 #define DEBUG_TYPE "amplifier-jit-event-listener"
40 class IntelJITEventListener : public JITEventListener {
41 typedef DenseMap<void*, unsigned int> MethodIDMap;
43 std::unique_ptr<IntelJITEventsWrapper> Wrapper;
44 MethodIDMap MethodIDs;
46 typedef SmallVector<const void *, 64> MethodAddressVector;
47 typedef DenseMap<const void *, MethodAddressVector> ObjectMap;
49 ObjectMap LoadedObjectMap;
50 std::map<const char*, OwningBinary<ObjectFile>> DebugObjects;
53 IntelJITEventListener(IntelJITEventsWrapper* libraryWrapper) {
54 Wrapper.reset(libraryWrapper);
57 ~IntelJITEventListener() {
60 void NotifyObjectEmitted(const ObjectFile &Obj,
61 const RuntimeDyld::LoadedObjectInfo &L) override;
63 void NotifyFreeingObject(const ObjectFile &Obj) override;
66 static LineNumberInfo DILineInfoToIntelJITFormat(uintptr_t StartAddress,
69 LineNumberInfo Result;
71 Result.Offset = Address - StartAddress;
72 Result.LineNumber = Line.Line;
77 static iJIT_Method_Load FunctionDescToIntelJITFormat(
78 IntelJITEventsWrapper& Wrapper,
82 iJIT_Method_Load Result;
83 memset(&Result, 0, sizeof(iJIT_Method_Load));
85 Result.method_id = Wrapper.iJIT_GetNewMethodID();
86 Result.method_name = const_cast<char*>(FnName);
87 Result.method_load_address = reinterpret_cast<void*>(FnStart);
88 Result.method_size = FnSize;
91 Result.class_file_name = NULL;
92 Result.user_data = NULL;
93 Result.user_data_size = 0;
94 Result.env = iJDE_JittingAPI;
99 void IntelJITEventListener::NotifyObjectEmitted(
100 const ObjectFile &Obj,
101 const RuntimeDyld::LoadedObjectInfo &L) {
103 OwningBinary<ObjectFile> DebugObjOwner = L.getObjectForDebug(Obj);
104 const ObjectFile *DebugObj = DebugObjOwner.getBinary();
108 // Get the address of the object image for use as a unique identifier
109 const void* ObjData = DebugObj->getData().data();
110 std::unique_ptr<DIContext> Context = DWARFContext::create(*DebugObj);
111 MethodAddressVector Functions;
113 // Use symbol info to iterate functions in the object.
114 for (const std::pair<SymbolRef, uint64_t> &P : computeSymbolSizes(*DebugObj)) {
115 SymbolRef Sym = P.first;
116 std::vector<LineNumberInfo> LineInfo;
117 std::string SourceFileName;
119 Expected<SymbolRef::Type> SymTypeOrErr = Sym.getType();
121 // TODO: Actually report errors helpfully.
122 consumeError(SymTypeOrErr.takeError());
125 SymbolRef::Type SymType = *SymTypeOrErr;
126 if (SymType != SymbolRef::ST_Function)
129 Expected<StringRef> Name = Sym.getName();
131 // TODO: Actually report errors helpfully.
132 consumeError(Name.takeError());
136 Expected<uint64_t> AddrOrErr = Sym.getAddress();
138 // TODO: Actually report errors helpfully.
139 consumeError(AddrOrErr.takeError());
142 uint64_t Addr = *AddrOrErr;
143 uint64_t Size = P.second;
145 // Record this address in a local vector
146 Functions.push_back((void*)Addr);
148 // Build the function loaded notification message
149 iJIT_Method_Load FunctionMessage =
150 FunctionDescToIntelJITFormat(*Wrapper, Name->data(), Addr, Size);
151 DILineInfoTable Lines = Context->getLineInfoForAddressRange(Addr, Size);
152 DILineInfoTable::iterator Begin = Lines.begin();
153 DILineInfoTable::iterator End = Lines.end();
154 for (DILineInfoTable::iterator It = Begin; It != End; ++It) {
156 DILineInfoToIntelJITFormat((uintptr_t)Addr, It->first, It->second));
158 if (LineInfo.size() == 0) {
159 FunctionMessage.source_file_name = 0;
160 FunctionMessage.line_number_size = 0;
161 FunctionMessage.line_number_table = 0;
163 // Source line information for the address range is provided as
164 // a code offset for the start of the corresponding sub-range and
165 // a source line. JIT API treats offsets in LineNumberInfo structures
166 // as the end of the corresponding code region. The start of the code
167 // is taken from the previous element. Need to shift the elements.
169 LineNumberInfo last = LineInfo.back();
170 last.Offset = FunctionMessage.method_size;
171 LineInfo.push_back(last);
172 for (size_t i = LineInfo.size() - 2; i > 0; --i)
173 LineInfo[i].LineNumber = LineInfo[i - 1].LineNumber;
175 SourceFileName = Lines.front().second.FileName;
176 FunctionMessage.source_file_name =
177 const_cast<char *>(SourceFileName.c_str());
178 FunctionMessage.line_number_size = LineInfo.size();
179 FunctionMessage.line_number_table = &*LineInfo.begin();
182 Wrapper->iJIT_NotifyEvent(iJVM_EVENT_TYPE_METHOD_LOAD_FINISHED,
184 MethodIDs[(void*)Addr] = FunctionMessage.method_id;
187 // To support object unload notification, we need to keep a list of
188 // registered function addresses for each loaded object. We will
189 // use the MethodIDs map to get the registered ID for each function.
190 LoadedObjectMap[ObjData] = Functions;
191 DebugObjects[Obj.getData().data()] = std::move(DebugObjOwner);
194 void IntelJITEventListener::NotifyFreeingObject(const ObjectFile &Obj) {
195 // This object may not have been registered with the listener. If it wasn't,
197 if (DebugObjects.find(Obj.getData().data()) == DebugObjects.end())
200 // Get the address of the object image for use as a unique identifier
201 const ObjectFile &DebugObj = *DebugObjects[Obj.getData().data()].getBinary();
202 const void* ObjData = DebugObj.getData().data();
204 // Get the object's function list from LoadedObjectMap
205 ObjectMap::iterator OI = LoadedObjectMap.find(ObjData);
206 if (OI == LoadedObjectMap.end())
208 MethodAddressVector& Functions = OI->second;
210 // Walk the function list, unregistering each function
211 for (MethodAddressVector::iterator FI = Functions.begin(),
212 FE = Functions.end();
215 void* FnStart = const_cast<void*>(*FI);
216 MethodIDMap::iterator MI = MethodIDs.find(FnStart);
217 if (MI != MethodIDs.end()) {
218 Wrapper->iJIT_NotifyEvent(iJVM_EVENT_TYPE_METHOD_UNLOAD_START,
224 // Erase the object from LoadedObjectMap
225 LoadedObjectMap.erase(OI);
226 DebugObjects.erase(Obj.getData().data());
229 } // anonymous namespace.
232 JITEventListener *JITEventListener::createIntelJITEventListener() {
233 return new IntelJITEventListener(new IntelJITEventsWrapper);
237 JITEventListener *JITEventListener::createIntelJITEventListener(
238 IntelJITEventsWrapper* TestImpl) {
239 return new IntelJITEventListener(TestImpl);
244 LLVMJITEventListenerRef LLVMCreateIntelJITEventListener(void)
246 return wrap(JITEventListener::createIntelJITEventListener());