mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-09-06 09:54:49 +00:00
include/llvm/Analysis/DebugInfo.h to include/llvm/DebugInfo.h. The reasoning is because the DebugInfo module is simply an interface to the debug info MDNodes and has nothing to do with analysis. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@159312 91177308-0d34-0410-b5e6-96231b3b80d8
178 lines
6.3 KiB
C++
178 lines
6.3 KiB
C++
//===-- OProfileJITEventListener.cpp - Tell OProfile about JITted 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 that uses OProfileWrapper to tell
|
|
// oprofile about JITted functions, including source line information.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/Config/config.h"
|
|
#include "llvm/ExecutionEngine/JITEventListener.h"
|
|
|
|
#define DEBUG_TYPE "oprofile-jit-event-listener"
|
|
#include "llvm/DebugInfo.h"
|
|
#include "llvm/Function.h"
|
|
#include "llvm/ADT/OwningPtr.h"
|
|
#include "llvm/CodeGen/MachineFunction.h"
|
|
#include "llvm/ExecutionEngine/OProfileWrapper.h"
|
|
#include "llvm/Support/Debug.h"
|
|
#include "llvm/Support/raw_ostream.h"
|
|
#include "llvm/Support/Errno.h"
|
|
#include "EventListenerCommon.h"
|
|
|
|
#include <dirent.h>
|
|
#include <fcntl.h>
|
|
|
|
using namespace llvm;
|
|
using namespace llvm::jitprofiling;
|
|
|
|
namespace {
|
|
|
|
class OProfileJITEventListener : public JITEventListener {
|
|
OProfileWrapper& Wrapper;
|
|
|
|
void initialize();
|
|
|
|
public:
|
|
OProfileJITEventListener(OProfileWrapper& LibraryWrapper)
|
|
: Wrapper(LibraryWrapper) {
|
|
initialize();
|
|
}
|
|
|
|
~OProfileJITEventListener();
|
|
|
|
virtual void NotifyFunctionEmitted(const Function &F,
|
|
void *FnStart, size_t FnSize,
|
|
const JITEvent_EmittedFunctionDetails &Details);
|
|
|
|
virtual void NotifyFreeingMachineCode(void *OldPtr);
|
|
};
|
|
|
|
void OProfileJITEventListener::initialize() {
|
|
if (!Wrapper.op_open_agent()) {
|
|
const std::string err_str = sys::StrError();
|
|
DEBUG(dbgs() << "Failed to connect to OProfile agent: " << err_str << "\n");
|
|
} else {
|
|
DEBUG(dbgs() << "Connected to OProfile agent.\n");
|
|
}
|
|
}
|
|
|
|
OProfileJITEventListener::~OProfileJITEventListener() {
|
|
if (Wrapper.isAgentAvailable()) {
|
|
if (Wrapper.op_close_agent() == -1) {
|
|
const std::string err_str = sys::StrError();
|
|
DEBUG(dbgs() << "Failed to disconnect from OProfile agent: "
|
|
<< err_str << "\n");
|
|
} else {
|
|
DEBUG(dbgs() << "Disconnected from OProfile agent.\n");
|
|
}
|
|
}
|
|
}
|
|
|
|
static debug_line_info LineStartToOProfileFormat(
|
|
const MachineFunction &MF, FilenameCache &Filenames,
|
|
uintptr_t Address, DebugLoc Loc) {
|
|
debug_line_info Result;
|
|
Result.vma = Address;
|
|
Result.lineno = Loc.getLine();
|
|
Result.filename = Filenames.getFilename(
|
|
Loc.getScope(MF.getFunction()->getContext()));
|
|
DEBUG(dbgs() << "Mapping " << reinterpret_cast<void*>(Result.vma) << " to "
|
|
<< Result.filename << ":" << Result.lineno << "\n");
|
|
return Result;
|
|
}
|
|
|
|
// Adds the just-emitted function to the symbol table.
|
|
void OProfileJITEventListener::NotifyFunctionEmitted(
|
|
const Function &F, void *FnStart, size_t FnSize,
|
|
const JITEvent_EmittedFunctionDetails &Details) {
|
|
assert(F.hasName() && FnStart != 0 && "Bad symbol to add");
|
|
if (Wrapper.op_write_native_code(F.getName().data(),
|
|
reinterpret_cast<uint64_t>(FnStart),
|
|
FnStart, FnSize) == -1) {
|
|
DEBUG(dbgs() << "Failed to tell OProfile about native function "
|
|
<< F.getName() << " at ["
|
|
<< FnStart << "-" << ((char*)FnStart + FnSize) << "]\n");
|
|
return;
|
|
}
|
|
|
|
if (!Details.LineStarts.empty()) {
|
|
// Now we convert the line number information from the address/DebugLoc
|
|
// format in Details to the address/filename/lineno format that OProfile
|
|
// expects. Note that OProfile 0.9.4 has a bug that causes it to ignore
|
|
// line numbers for addresses above 4G.
|
|
FilenameCache Filenames;
|
|
std::vector<debug_line_info> LineInfo;
|
|
LineInfo.reserve(1 + Details.LineStarts.size());
|
|
|
|
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()) {
|
|
// If we have debug info for the function itself, use that as the line
|
|
// number of the first several instructions. Otherwise, after filling
|
|
// LineInfo, we'll adjust the address of the first line number to point at
|
|
// the start of the function.
|
|
debug_line_info line_info;
|
|
line_info.vma = reinterpret_cast<uintptr_t>(FnStart);
|
|
line_info.lineno = FunctionDI.getLineNumber();
|
|
line_info.filename = Filenames.getFilename(FirstLocScope);
|
|
LineInfo.push_back(line_info);
|
|
}
|
|
|
|
for (std::vector<EmittedFunctionDetails::LineStart>::const_iterator
|
|
I = Details.LineStarts.begin(), E = Details.LineStarts.end();
|
|
I != E; ++I) {
|
|
LineInfo.push_back(LineStartToOProfileFormat(
|
|
*Details.MF, Filenames, I->Address, I->Loc));
|
|
}
|
|
|
|
// In case the function didn't have line info of its own, adjust the first
|
|
// line info's address to include the start of the function.
|
|
LineInfo[0].vma = reinterpret_cast<uintptr_t>(FnStart);
|
|
|
|
if (Wrapper.op_write_debug_line_info(FnStart, LineInfo.size(),
|
|
&*LineInfo.begin()) == -1) {
|
|
DEBUG(dbgs()
|
|
<< "Failed to tell OProfile about line numbers for native function "
|
|
<< F.getName() << " at ["
|
|
<< FnStart << "-" << ((char*)FnStart + FnSize) << "]\n");
|
|
}
|
|
}
|
|
}
|
|
|
|
// Removes the being-deleted function from the symbol table.
|
|
void OProfileJITEventListener::NotifyFreeingMachineCode(void *FnStart) {
|
|
assert(FnStart && "Invalid function pointer");
|
|
if (Wrapper.op_unload_native_code(reinterpret_cast<uint64_t>(FnStart)) == -1) {
|
|
DEBUG(dbgs()
|
|
<< "Failed to tell OProfile about unload of native function at "
|
|
<< FnStart << "\n");
|
|
}
|
|
}
|
|
|
|
} // anonymous namespace.
|
|
|
|
namespace llvm {
|
|
JITEventListener *JITEventListener::createOProfileJITEventListener() {
|
|
static OwningPtr<OProfileWrapper> JITProfilingWrapper(new OProfileWrapper);
|
|
return new OProfileJITEventListener(*JITProfilingWrapper);
|
|
}
|
|
|
|
// for testing
|
|
JITEventListener *JITEventListener::createOProfileJITEventListener(
|
|
OProfileWrapper* TestImpl) {
|
|
return new OProfileJITEventListener(*TestImpl);
|
|
}
|
|
|
|
} // namespace llvm
|
|
|