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| //===-- llvm-jitlistener.cpp - Utility for testing MCJIT event listener ---===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This program is a used by lit tests to verify the MCJIT JITEventListener
// interface. It registers a mock JIT event listener, generates a module from
// an input IR file and dumps the reported event information to stdout.
//
//===----------------------------------------------------------------------===//
#include "../../lib/ExecutionEngine/IntelJITEvents/IntelJITEventsWrapper.h"
#include "llvm/ADT/Triple.h"
#include "llvm/ExecutionEngine/JITEventListener.h"
#include "llvm/ExecutionEngine/MCJIT.h"
#include "llvm/ExecutionEngine/SectionMemoryManager.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/Module.h"
#include "llvm/IRReader/IRReader.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/Host.h"
#include "llvm/Support/InitLLVM.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/SourceMgr.h"
#include "llvm/Support/TargetSelect.h"
#include "llvm/Support/raw_ostream.h"
#include <string>
using namespace llvm;
namespace {
typedef std::vector<std::pair<std::string, unsigned int> > SourceLocations;
typedef std::map<uint64_t, SourceLocations> NativeCodeMap;
NativeCodeMap ReportedDebugFuncs;
int NotifyEvent(iJIT_JVM_EVENT EventType, void *EventSpecificData) {
switch (EventType) {
case iJVM_EVENT_TYPE_METHOD_LOAD_FINISHED: {
if (!EventSpecificData) {
errs() <<
"Error: The JIT event listener did not provide a event data.";
return -1;
}
iJIT_Method_Load* msg = static_cast<iJIT_Method_Load*>(EventSpecificData);
ReportedDebugFuncs[msg->method_id];
outs() << "Method load [" << msg->method_id << "]: " << msg->method_name
<< ", Size = " << msg->method_size << "\n";
for(unsigned int i = 0; i < msg->line_number_size; ++i) {
if (!msg->line_number_table) {
errs() << "A function with a non-zero line count had no line table.";
return -1;
}
std::pair<std::string, unsigned int> loc(
std::string(msg->source_file_name),
msg->line_number_table[i].LineNumber);
ReportedDebugFuncs[msg->method_id].push_back(loc);
outs() << " Line info @ " << msg->line_number_table[i].Offset
<< ": " << msg->source_file_name
<< ", line " << msg->line_number_table[i].LineNumber << "\n";
}
outs() << "\n";
}
break;
case iJVM_EVENT_TYPE_METHOD_UNLOAD_START: {
if (!EventSpecificData) {
errs() <<
"Error: The JIT event listener did not provide a event data.";
return -1;
}
unsigned int UnloadId
= *reinterpret_cast<unsigned int*>(EventSpecificData);
assert(1 == ReportedDebugFuncs.erase(UnloadId));
outs() << "Method unload [" << UnloadId << "]\n";
}
break;
default:
break;
}
return 0;
}
iJIT_IsProfilingActiveFlags IsProfilingActive(void) {
// for testing, pretend we have an Intel Parallel Amplifier XE 2011
// instance attached
return iJIT_SAMPLING_ON;
}
unsigned int GetNewMethodID(void) {
static unsigned int id = 0;
return ++id;
}
class JitEventListenerTest {
protected:
void InitEE(const std::string &IRFile) {
// If we have a native target, initialize it to ensure it is linked in and
// usable by the JIT.
InitializeNativeTarget();
InitializeNativeTargetAsmPrinter();
// Parse the bitcode...
SMDiagnostic Err;
std::unique_ptr<Module> TheModule(parseIRFile(IRFile, Err, Context));
if (!TheModule) {
errs() << Err.getMessage();
return;
}
RTDyldMemoryManager *MemMgr = new SectionMemoryManager();
if (!MemMgr) {
errs() << "Unable to create memory manager.";
return;
}
// Override the triple to generate ELF on Windows since that's supported
Triple Tuple(TheModule->getTargetTriple());
if (Tuple.getTriple().empty())
Tuple.setTriple(sys::getProcessTriple());
if (Tuple.isOSWindows() && !Tuple.isOSBinFormatELF()) {
Tuple.setObjectFormat(Triple::ELF);
TheModule->setTargetTriple(Tuple.getTriple());
}
// Compile the IR
std::string Error;
TheJIT.reset(EngineBuilder(std::move(TheModule))
.setEngineKind(EngineKind::JIT)
.setErrorStr(&Error)
.setMCJITMemoryManager(std::unique_ptr<RTDyldMemoryManager>(MemMgr))
.create());
if (Error.empty() == false)
errs() << Error;
}
void DestroyEE() {
TheJIT.reset();
}
LLVMContext Context; // Global ownership
std::unique_ptr<ExecutionEngine> TheJIT;
public:
void ProcessInput(const std::string &Filename) {
InitEE(Filename);
std::unique_ptr<llvm::JITEventListener> Listener(
JITEventListener::createIntelJITEventListener(new IntelJITEventsWrapper(
NotifyEvent, 0, IsProfilingActive, 0, 0, GetNewMethodID)));
TheJIT->RegisterJITEventListener(Listener.get());
TheJIT->finalizeObject();
// Destroy the JIT engine instead of unregistering to get unload events.
DestroyEE();
}
};
} // end anonymous namespace
static cl::opt<std::string>
InputFilename(cl::Positional, cl::desc("<input IR file>"),
cl::Required);
int main(int argc, char **argv) {
InitLLVM X(argc, argv);
cl::ParseCommandLineOptions(argc, argv, "llvm jit event listener test utility\n");
JitEventListenerTest Test;
Test.ProcessInput(InputFilename);
return 0;
}
|