mirror of
https://github.com/c64scene-ar/llvm-6502.git
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into their new header subdirectory: include/llvm/IR. This matches the directory structure of lib, and begins to correct a long standing point of file layout clutter in LLVM. There are still more header files to move here, but I wanted to handle them in separate commits to make tracking what files make sense at each layer easier. The only really questionable files here are the target intrinsic tablegen files. But that's a battle I'd rather not fight today. I've updated both CMake and Makefile build systems (I think, and my tests think, but I may have missed something). I've also re-sorted the includes throughout the project. I'll be committing updates to Clang, DragonEgg, and Polly momentarily. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171366 91177308-0d34-0410-b5e6-96231b3b80d8
178 lines
6.3 KiB
C++
178 lines
6.3 KiB
C++
//===-- OProfileJITEventListener.cpp - Tell OProfile about JITted code ----===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines a JITEventListener object that uses OProfileWrapper to tell
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// oprofile about JITted functions, including source line information.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Config/config.h"
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#include "llvm/ExecutionEngine/JITEventListener.h"
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#define DEBUG_TYPE "oprofile-jit-event-listener"
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#include "llvm/DebugInfo.h"
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#include "llvm/IR/Function.h"
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#include "llvm/ADT/OwningPtr.h"
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#include "llvm/CodeGen/MachineFunction.h"
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#include "llvm/ExecutionEngine/OProfileWrapper.h"
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#include "llvm/Support/Debug.h"
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#include "llvm/Support/raw_ostream.h"
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#include "llvm/Support/Errno.h"
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#include "EventListenerCommon.h"
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#include <dirent.h>
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#include <fcntl.h>
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using namespace llvm;
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using namespace llvm::jitprofiling;
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namespace {
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class OProfileJITEventListener : public JITEventListener {
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OProfileWrapper& Wrapper;
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void initialize();
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public:
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OProfileJITEventListener(OProfileWrapper& LibraryWrapper)
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: Wrapper(LibraryWrapper) {
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initialize();
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}
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~OProfileJITEventListener();
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virtual void NotifyFunctionEmitted(const Function &F,
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void *FnStart, size_t FnSize,
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const JITEvent_EmittedFunctionDetails &Details);
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virtual void NotifyFreeingMachineCode(void *OldPtr);
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};
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void OProfileJITEventListener::initialize() {
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if (!Wrapper.op_open_agent()) {
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const std::string err_str = sys::StrError();
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DEBUG(dbgs() << "Failed to connect to OProfile agent: " << err_str << "\n");
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} else {
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DEBUG(dbgs() << "Connected to OProfile agent.\n");
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}
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}
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OProfileJITEventListener::~OProfileJITEventListener() {
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if (Wrapper.isAgentAvailable()) {
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if (Wrapper.op_close_agent() == -1) {
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const std::string err_str = sys::StrError();
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DEBUG(dbgs() << "Failed to disconnect from OProfile agent: "
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<< err_str << "\n");
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} else {
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DEBUG(dbgs() << "Disconnected from OProfile agent.\n");
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}
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}
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}
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static debug_line_info LineStartToOProfileFormat(
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const MachineFunction &MF, FilenameCache &Filenames,
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uintptr_t Address, DebugLoc Loc) {
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debug_line_info Result;
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Result.vma = Address;
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Result.lineno = Loc.getLine();
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Result.filename = Filenames.getFilename(
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Loc.getScope(MF.getFunction()->getContext()));
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DEBUG(dbgs() << "Mapping " << reinterpret_cast<void*>(Result.vma) << " to "
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<< Result.filename << ":" << Result.lineno << "\n");
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return Result;
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}
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// Adds the just-emitted function to the symbol table.
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void OProfileJITEventListener::NotifyFunctionEmitted(
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const Function &F, void *FnStart, size_t FnSize,
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const JITEvent_EmittedFunctionDetails &Details) {
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assert(F.hasName() && FnStart != 0 && "Bad symbol to add");
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if (Wrapper.op_write_native_code(F.getName().data(),
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reinterpret_cast<uint64_t>(FnStart),
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FnStart, FnSize) == -1) {
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DEBUG(dbgs() << "Failed to tell OProfile about native function "
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<< F.getName() << " at ["
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<< FnStart << "-" << ((char*)FnStart + FnSize) << "]\n");
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return;
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}
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if (!Details.LineStarts.empty()) {
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// Now we convert the line number information from the address/DebugLoc
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// format in Details to the address/filename/lineno format that OProfile
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// expects. Note that OProfile 0.9.4 has a bug that causes it to ignore
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// line numbers for addresses above 4G.
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FilenameCache Filenames;
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std::vector<debug_line_info> LineInfo;
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LineInfo.reserve(1 + Details.LineStarts.size());
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DebugLoc FirstLoc = Details.LineStarts[0].Loc;
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assert(!FirstLoc.isUnknown()
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&& "LineStarts should not contain unknown DebugLocs");
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MDNode *FirstLocScope = FirstLoc.getScope(F.getContext());
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DISubprogram FunctionDI = getDISubprogram(FirstLocScope);
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if (FunctionDI.Verify()) {
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// If we have debug info for the function itself, use that as the line
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// number of the first several instructions. Otherwise, after filling
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// LineInfo, we'll adjust the address of the first line number to point at
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// the start of the function.
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debug_line_info line_info;
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line_info.vma = reinterpret_cast<uintptr_t>(FnStart);
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line_info.lineno = FunctionDI.getLineNumber();
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line_info.filename = Filenames.getFilename(FirstLocScope);
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LineInfo.push_back(line_info);
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}
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for (std::vector<EmittedFunctionDetails::LineStart>::const_iterator
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I = Details.LineStarts.begin(), E = Details.LineStarts.end();
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I != E; ++I) {
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LineInfo.push_back(LineStartToOProfileFormat(
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*Details.MF, Filenames, I->Address, I->Loc));
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}
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// In case the function didn't have line info of its own, adjust the first
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// line info's address to include the start of the function.
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LineInfo[0].vma = reinterpret_cast<uintptr_t>(FnStart);
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if (Wrapper.op_write_debug_line_info(FnStart, LineInfo.size(),
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&*LineInfo.begin()) == -1) {
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DEBUG(dbgs()
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<< "Failed to tell OProfile about line numbers for native function "
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<< F.getName() << " at ["
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<< FnStart << "-" << ((char*)FnStart + FnSize) << "]\n");
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}
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}
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}
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// Removes the being-deleted function from the symbol table.
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void OProfileJITEventListener::NotifyFreeingMachineCode(void *FnStart) {
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assert(FnStart && "Invalid function pointer");
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if (Wrapper.op_unload_native_code(reinterpret_cast<uint64_t>(FnStart)) == -1) {
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DEBUG(dbgs()
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<< "Failed to tell OProfile about unload of native function at "
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<< FnStart << "\n");
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}
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}
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} // anonymous namespace.
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namespace llvm {
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JITEventListener *JITEventListener::createOProfileJITEventListener() {
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static OwningPtr<OProfileWrapper> JITProfilingWrapper(new OProfileWrapper);
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return new OProfileJITEventListener(*JITProfilingWrapper);
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}
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// for testing
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JITEventListener *JITEventListener::createOProfileJITEventListener(
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OProfileWrapper* TestImpl) {
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return new OProfileJITEventListener(*TestImpl);
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}
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} // namespace llvm
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