Move lib/Analysis/DebugInfo.cpp to lib/VMCore/DebugInfo.cpp and
[oota-llvm.git] / lib / ExecutionEngine / IntelJITEvents / IntelJITEventListener.cpp
1 //===-- IntelJITEventListener.cpp - Tell Intel profiler about JITed code --===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file defines a JITEventListener object to tell Intel(R) VTune(TM)
11 // Amplifier XE 2011 about JITted functions.
12 //
13 //===----------------------------------------------------------------------===//
14
15 #include "llvm/Config/config.h"
16 #include "llvm/ExecutionEngine/JITEventListener.h"
17
18 #define DEBUG_TYPE "amplifier-jit-event-listener"
19 #include "llvm/DebugInfo.h"
20 #include "llvm/Function.h"
21 #include "llvm/Metadata.h"
22 #include "llvm/ADT/DenseMap.h"
23 #include "llvm/ADT/OwningPtr.h"
24 #include "llvm/CodeGen/MachineFunction.h"
25 #include "llvm/ExecutionEngine/IntelJITEventsWrapper.h"
26 #include "llvm/Support/Debug.h"
27 #include "llvm/Support/raw_ostream.h"
28 #include "llvm/Support/Errno.h"
29 #include "llvm/Support/ValueHandle.h"
30 #include "EventListenerCommon.h"
31
32 using namespace llvm;
33 using namespace llvm::jitprofiling;
34
35 namespace {
36
37 class IntelJITEventListener : public JITEventListener {
38   typedef DenseMap<void*, unsigned int> MethodIDMap;
39
40   IntelJITEventsWrapper& Wrapper;
41   MethodIDMap MethodIDs;
42   FilenameCache Filenames;
43
44 public:
45   IntelJITEventListener(IntelJITEventsWrapper& libraryWrapper)
46   : Wrapper(libraryWrapper) {
47   }
48
49   ~IntelJITEventListener() {
50   }
51
52   virtual void NotifyFunctionEmitted(const Function &F,
53                                      void *FnStart, size_t FnSize,
54                                      const EmittedFunctionDetails &Details);
55
56   virtual void NotifyFreeingMachineCode(void *OldPtr);
57 };
58
59 static LineNumberInfo LineStartToIntelJITFormat(
60     uintptr_t StartAddress,
61     uintptr_t Address,
62     DebugLoc Loc) {
63   LineNumberInfo Result;
64
65   Result.Offset = Address - StartAddress;
66   Result.LineNumber = Loc.getLine();
67
68   return Result;
69 }
70
71 static iJIT_Method_Load FunctionDescToIntelJITFormat(
72     IntelJITEventsWrapper& Wrapper,
73     const char* FnName,
74     uintptr_t FnStart,
75     size_t FnSize) {
76   iJIT_Method_Load Result;
77   memset(&Result, 0, sizeof(iJIT_Method_Load));
78
79   Result.method_id = Wrapper.iJIT_GetNewMethodID();
80   Result.method_name = const_cast<char*>(FnName);
81   Result.method_load_address = reinterpret_cast<void*>(FnStart);
82   Result.method_size = FnSize;
83
84   Result.class_id = 0;
85   Result.class_file_name = NULL;
86   Result.user_data = NULL;
87   Result.user_data_size = 0;
88   Result.env = iJDE_JittingAPI;
89
90   return Result;
91 }
92
93 // Adds the just-emitted function to the symbol table.
94 void IntelJITEventListener::NotifyFunctionEmitted(
95     const Function &F, void *FnStart, size_t FnSize,
96     const EmittedFunctionDetails &Details) {
97   iJIT_Method_Load FunctionMessage = FunctionDescToIntelJITFormat(Wrapper,
98                                       F.getName().data(),
99                                       reinterpret_cast<uint64_t>(FnStart),
100                                       FnSize);
101
102   std::vector<LineNumberInfo> LineInfo;
103
104   if (!Details.LineStarts.empty()) {
105     // Now convert the line number information from the address/DebugLoc
106     // format in Details to the offset/lineno in Intel JIT API format.
107
108     LineInfo.reserve(Details.LineStarts.size() + 1);
109
110     DebugLoc FirstLoc = Details.LineStarts[0].Loc;
111     assert(!FirstLoc.isUnknown()
112            && "LineStarts should not contain unknown DebugLocs");
113
114     MDNode *FirstLocScope = FirstLoc.getScope(F.getContext());
115     DISubprogram FunctionDI = getDISubprogram(FirstLocScope);
116     if (FunctionDI.Verify()) {
117       FunctionMessage.source_file_name = const_cast<char*>(
118                                           Filenames.getFullPath(FirstLocScope));
119
120       LineNumberInfo FirstLine;
121       FirstLine.Offset = 0;
122       FirstLine.LineNumber = FunctionDI.getLineNumber();
123       LineInfo.push_back(FirstLine);
124     }
125
126     for (std::vector<EmittedFunctionDetails::LineStart>::const_iterator I =
127           Details.LineStarts.begin(), E = Details.LineStarts.end();
128           I != E; ++I) {
129       // This implementation ignores the DebugLoc filename because the Intel
130       // JIT API does not support multiple source files associated with a single
131       // JIT function
132       LineInfo.push_back(LineStartToIntelJITFormat(
133                           reinterpret_cast<uintptr_t>(FnStart),
134                           I->Address,
135                           I->Loc));
136
137       // If we have no file name yet for the function, use the filename from
138       // the first instruction that has one
139       if (FunctionMessage.source_file_name == 0) {
140         MDNode *scope = I->Loc.getScope(
141                                         Details.MF->getFunction()->getContext());
142         FunctionMessage.source_file_name = const_cast<char*>(
143                                                   Filenames.getFullPath(scope));
144       }
145     }
146
147     FunctionMessage.line_number_size = LineInfo.size();
148     FunctionMessage.line_number_table = &*LineInfo.begin();
149   } else {
150     FunctionMessage.line_number_size = 0;
151     FunctionMessage.line_number_table = 0;
152   }
153
154   Wrapper.iJIT_NotifyEvent(iJVM_EVENT_TYPE_METHOD_LOAD_FINISHED,
155                                                                                                          &FunctionMessage);
156   MethodIDs[FnStart] = FunctionMessage.method_id;
157 }
158
159 void IntelJITEventListener::NotifyFreeingMachineCode(void *FnStart) {
160   MethodIDMap::iterator I = MethodIDs.find(FnStart);
161   if (I != MethodIDs.end()) {
162     Wrapper.iJIT_NotifyEvent(iJVM_EVENT_TYPE_METHOD_UNLOAD_START, &I->second);
163     MethodIDs.erase(I);
164   }
165 }
166
167 }  // anonymous namespace.
168
169 namespace llvm {
170 JITEventListener *JITEventListener::createIntelJITEventListener() {
171   static OwningPtr<IntelJITEventsWrapper> JITProfilingWrapper(
172                                             new IntelJITEventsWrapper);
173   return new IntelJITEventListener(*JITProfilingWrapper);
174 }
175
176 // for testing
177 JITEventListener *JITEventListener::createIntelJITEventListener(
178                                       IntelJITEventsWrapper* TestImpl) {
179   return new IntelJITEventListener(*TestImpl);
180 }
181
182 } // namespace llvm
183