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//===-- IntelJITEventListener.cpp - Tell Intel profiler about JITed code --===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines a JITEventListener object to tell Intel(R) VTune(TM)
// Amplifier XE 2011 about JITted functions.
//
//===----------------------------------------------------------------------===//
#include "llvm/Config/config.h"
#include "llvm/ExecutionEngine/JITEventListener.h"
#define DEBUG_TYPE "amplifier-jit-event-listener"
#include "llvm/DebugInfo.h"
#include "llvm/Function.h"
#include "llvm/Metadata.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/OwningPtr.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/ExecutionEngine/IntelJITEventsWrapper.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Support/Errno.h"
#include "llvm/Support/ValueHandle.h"
#include "EventListenerCommon.h"
using namespace llvm;
using namespace llvm::jitprofiling;
namespace {
class IntelJITEventListener : public JITEventListener {
typedef DenseMap<void*, unsigned int> MethodIDMap;
OwningPtr<IntelJITEventsWrapper> Wrapper;
MethodIDMap MethodIDs;
FilenameCache Filenames;
public:
IntelJITEventListener(IntelJITEventsWrapper* libraryWrapper) {
Wrapper.reset(libraryWrapper);
}
~IntelJITEventListener() {
}
virtual void NotifyFunctionEmitted(const Function &F,
void *FnStart, size_t FnSize,
const EmittedFunctionDetails &Details);
virtual void NotifyFreeingMachineCode(void *OldPtr);
};
static LineNumberInfo LineStartToIntelJITFormat(
uintptr_t StartAddress,
uintptr_t Address,
DebugLoc Loc) {
LineNumberInfo Result;
Result.Offset = Address - StartAddress;
Result.LineNumber = Loc.getLine();
return Result;
}
static iJIT_Method_Load FunctionDescToIntelJITFormat(
IntelJITEventsWrapper& Wrapper,
const char* FnName,
uintptr_t FnStart,
size_t FnSize) {
iJIT_Method_Load Result;
memset(&Result, 0, sizeof(iJIT_Method_Load));
Result.method_id = Wrapper.iJIT_GetNewMethodID();
Result.method_name = const_cast<char*>(FnName);
Result.method_load_address = reinterpret_cast<void*>(FnStart);
Result.method_size = FnSize;
Result.class_id = 0;
Result.class_file_name = NULL;
Result.user_data = NULL;
Result.user_data_size = 0;
Result.env = iJDE_JittingAPI;
return Result;
}
// Adds the just-emitted function to the symbol table.
void IntelJITEventListener::NotifyFunctionEmitted(
const Function &F, void *FnStart, size_t FnSize,
const EmittedFunctionDetails &Details) {
iJIT_Method_Load FunctionMessage = FunctionDescToIntelJITFormat(*Wrapper,
F.getName().data(),
reinterpret_cast<uint64_t>(FnStart),
FnSize);
std::vector<LineNumberInfo> LineInfo;
if (!Details.LineStarts.empty()) {
// Now convert the line number information from the address/DebugLoc
// format in Details to the offset/lineno in Intel JIT API format.
LineInfo.reserve(Details.LineStarts.size() + 1);
DebugLoc FirstLoc = Details.LineStarts[0].Loc;
assert(!FirstLoc.isUnknown()
&& "LineStarts should not contain unknown DebugLocs");
MDNode *FirstLocScope = FirstLoc.getScope(F.getContext());
DISubprogram FunctionDI = getDISubprogram(FirstLocScope);
if (FunctionDI.Verify()) {
FunctionMessage.source_file_name = const_cast<char*>(
Filenames.getFullPath(FirstLocScope));
LineNumberInfo FirstLine;
FirstLine.Offset = 0;
FirstLine.LineNumber = FunctionDI.getLineNumber();
LineInfo.push_back(FirstLine);
}
for (std::vector<EmittedFunctionDetails::LineStart>::const_iterator I =
Details.LineStarts.begin(), E = Details.LineStarts.end();
I != E; ++I) {
// This implementation ignores the DebugLoc filename because the Intel
// JIT API does not support multiple source files associated with a single
// JIT function
LineInfo.push_back(LineStartToIntelJITFormat(
reinterpret_cast<uintptr_t>(FnStart),
I->Address,
I->Loc));
// If we have no file name yet for the function, use the filename from
// the first instruction that has one
if (FunctionMessage.source_file_name == 0) {
MDNode *scope = I->Loc.getScope(
Details.MF->getFunction()->getContext());
FunctionMessage.source_file_name = const_cast<char*>(
Filenames.getFullPath(scope));
}
}
FunctionMessage.line_number_size = LineInfo.size();
FunctionMessage.line_number_table = &*LineInfo.begin();
} else {
FunctionMessage.line_number_size = 0;
FunctionMessage.line_number_table = 0;
}
Wrapper->iJIT_NotifyEvent(iJVM_EVENT_TYPE_METHOD_LOAD_FINISHED,
&FunctionMessage);
MethodIDs[FnStart] = FunctionMessage.method_id;
}
void IntelJITEventListener::NotifyFreeingMachineCode(void *FnStart) {
MethodIDMap::iterator I = MethodIDs.find(FnStart);
if (I != MethodIDs.end()) {
Wrapper->iJIT_NotifyEvent(iJVM_EVENT_TYPE_METHOD_UNLOAD_START, &I->second);
MethodIDs.erase(I);
}
}
} // anonymous namespace.
namespace llvm {
JITEventListener *JITEventListener::createIntelJITEventListener() {
return new IntelJITEventListener(new IntelJITEventsWrapper);
}
// for testing
JITEventListener *JITEventListener::createIntelJITEventListener(
IntelJITEventsWrapper* TestImpl) {
return new IntelJITEventListener(TestImpl);
}
} // namespace llvm
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