tools/llvm-jitlistener/llvm-jitlistener.cpp

   1 //===-- llvm-jitlistener.cpp - Utility for testing MCJIT event listener ---===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 //
   9 // This program is a used by lit tests to verify the MCJIT JITEventListener
  10 // interface.  It registers a mock JIT event listener, generates a module from
  11 // an input IR file and dumps the reported event information to stdout.
  12 //
  13 //===----------------------------------------------------------------------===//
  14
  15 #include "../../lib/ExecutionEngine/IntelJITEvents/IntelJITEventsWrapper.h"
  16 #include "llvm/ADT/Triple.h"
  17 #include "llvm/ExecutionEngine/JITEventListener.h"
  18 #include "llvm/ExecutionEngine/MCJIT.h"
  19 #include "llvm/ExecutionEngine/SectionMemoryManager.h"
  20 #include "llvm/IR/LLVMContext.h"
  21 #include "llvm/IR/Module.h"
  22 #include "llvm/IRReader/IRReader.h"
  23 #include "llvm/Support/CommandLine.h"
  24 #include "llvm/Support/Debug.h"
  25 #include "llvm/Support/Host.h"
  26 #include "llvm/Support/InitLLVM.h"
  27 #include "llvm/Support/MemoryBuffer.h"
  28 #include "llvm/Support/SourceMgr.h"
  29 #include "llvm/Support/TargetSelect.h"
  30 #include "llvm/Support/raw_ostream.h"
  31 #include <string>
  32
  33 using namespace llvm;
  34
  35 namespace {
  36
  37 typedef std::vector<std::pair<std::string, unsigned int> > SourceLocations;
  38 typedef std::map<uint64_t, SourceLocations> NativeCodeMap;
  39
  40 NativeCodeMap  ReportedDebugFuncs;
  41
  42 int NotifyEvent(iJIT_JVM_EVENT EventType, void *EventSpecificData) {
  43   switch (EventType) {
  44     case iJVM_EVENT_TYPE_METHOD_LOAD_FINISHED: {
  45       if (!EventSpecificData) {
  46         errs() <<
  47           "Error: The JIT event listener did not provide a event data.";
  48         return -1;
  49       }
  50       iJIT_Method_Load* msg = static_cast<iJIT_Method_Load*>(EventSpecificData);
  51
  52       ReportedDebugFuncs[msg->method_id];
  53
  54       outs() << "Method load [" << msg->method_id << "]: " << msg->method_name
  55              << ", Size = " << msg->method_size << "\n";
  56
  57       for(unsigned int i = 0; i < msg->line_number_size; ++i) {
  58         if (!msg->line_number_table) {
  59           errs() << "A function with a non-zero line count had no line table.";
  60           return -1;
  61         }
  62         std::pair<std::string, unsigned int> loc(
  63           std::string(msg->source_file_name),
  64           msg->line_number_table[i].LineNumber);
  65         ReportedDebugFuncs[msg->method_id].push_back(loc);
  66         outs() << "  Line info @ " << msg->line_number_table[i].Offset
  67                << ": " << msg->source_file_name
  68                << ", line " << msg->line_number_table[i].LineNumber << "\n";
  69       }
  70       outs() << "\n";
  71     }
  72     break;
  73     case iJVM_EVENT_TYPE_METHOD_UNLOAD_START: {
  74       if (!EventSpecificData) {
  75         errs() <<
  76           "Error: The JIT event listener did not provide a event data.";
  77         return -1;
  78       }
  79       unsigned int UnloadId
  80         = *reinterpret_cast<unsigned int*>(EventSpecificData);
  81       assert(1 == ReportedDebugFuncs.erase(UnloadId));
  82       outs() << "Method unload [" << UnloadId << "]\n";
  83     }
  84     break;
  85     default:
  86       break;
  87   }
  88   return 0;
  89 }
  90
  91 iJIT_IsProfilingActiveFlags IsProfilingActive(void) {
  92   // for testing, pretend we have an Intel Parallel Amplifier XE 2011
  93   // instance attached
  94   return iJIT_SAMPLING_ON;
  95 }
  96
  97 unsigned int GetNewMethodID(void) {
  98   static unsigned int id = 0;
  99   return ++id;
 100 }
 101
 102 class JitEventListenerTest {
 103 protected:
 104   void InitEE(const std::string &IRFile) {
 105     // If we have a native target, initialize it to ensure it is linked in and
 106     // usable by the JIT.
 107     InitializeNativeTarget();
 108     InitializeNativeTargetAsmPrinter();
 109
 110     // Parse the bitcode...
 111     SMDiagnostic Err;
 112     std::unique_ptr<Module> TheModule(parseIRFile(IRFile, Err, Context));
 113     if (!TheModule) {
 114       errs() << Err.getMessage();
 115       return;
 116     }
 117
 118     RTDyldMemoryManager *MemMgr = new SectionMemoryManager();
 119     if (!MemMgr) {
 120       errs() << "Unable to create memory manager.";
 121       return;
 122     }
 123
 124     // Override the triple to generate ELF on Windows since that's supported
 125     Triple Tuple(TheModule->getTargetTriple());
 126     if (Tuple.getTriple().empty())
 127       Tuple.setTriple(sys::getProcessTriple());
 128
 129     if (Tuple.isOSWindows() && !Tuple.isOSBinFormatELF()) {
 130       Tuple.setObjectFormat(Triple::ELF);
 131       TheModule->setTargetTriple(Tuple.getTriple());
 132     }
 133
 134     // Compile the IR
 135     std::string Error;
 136     TheJIT.reset(EngineBuilder(std::move(TheModule))
 137       .setEngineKind(EngineKind::JIT)
 138       .setErrorStr(&Error)
 139       .setMCJITMemoryManager(std::unique_ptr<RTDyldMemoryManager>(MemMgr))
 140       .create());
 141     if (Error.empty() == false)
 142       errs() << Error;
 143   }
 144
 145   void DestroyEE() {
 146     TheJIT.reset();
 147   }
 148
 149   LLVMContext Context; // Global ownership
 150   std::unique_ptr<ExecutionEngine> TheJIT;
 151
 152 public:
 153   void ProcessInput(const std::string &Filename) {
 154     InitEE(Filename);
 155
 156     std::unique_ptr<llvm::JITEventListener> Listener(
 157         JITEventListener::createIntelJITEventListener(new IntelJITEventsWrapper(
 158             NotifyEvent, 0, IsProfilingActive, 0, 0, GetNewMethodID)));
 159
 160     TheJIT->RegisterJITEventListener(Listener.get());
 161
 162     TheJIT->finalizeObject();
 163
 164     // Destroy the JIT engine instead of unregistering to get unload events.
 165     DestroyEE();
 166   }
 167 };
 168
 169
 170
 171 } // end anonymous namespace
 172
 173 static cl::opt<std::string>
 174 InputFilename(cl::Positional, cl::desc("<input IR file>"),
 175                cl::Required);
 176
 177 int main(int argc, char **argv) {
 178   InitLLVM X(argc, argv);
 179   cl::ParseCommandLineOptions(argc, argv, "llvm jit event listener test utility\n");
 180
 181   JitEventListenerTest Test;
 182   Test.ProcessInput(InputFilename);
 183   return 0;
 184 }