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Diffstat (limited to 'lib/ExecutionEngine/JIT/OProfileJITEventListener.cpp')
-rw-r--r-- | lib/ExecutionEngine/JIT/OProfileJITEventListener.cpp | 192 |
1 files changed, 0 insertions, 192 deletions
diff --git a/lib/ExecutionEngine/JIT/OProfileJITEventListener.cpp b/lib/ExecutionEngine/JIT/OProfileJITEventListener.cpp deleted file mode 100644 index 9a9ed6d334..0000000000 --- a/lib/ExecutionEngine/JIT/OProfileJITEventListener.cpp +++ /dev/null @@ -1,192 +0,0 @@ -//===-- 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 calls into OProfile to tell -// it about JITted functions. For now, we only record function names and sizes, -// but eventually we'll also record line number information. -// -// See http://oprofile.sourceforge.net/doc/devel/jit-interface.html for the -// definition of the interface we're using. -// -//===----------------------------------------------------------------------===// - -#define DEBUG_TYPE "oprofile-jit-event-listener" -#include "llvm/Function.h" -#include "llvm/Metadata.h" -#include "llvm/ADT/DenseMap.h" -#include "llvm/Analysis/DebugInfo.h" -#include "llvm/CodeGen/MachineFunction.h" -#include "llvm/ExecutionEngine/JITEventListener.h" -#include "llvm/Support/Debug.h" -#include "llvm/Support/ValueHandle.h" -#include "llvm/Support/raw_ostream.h" -#include "llvm/Support/Errno.h" -#include "llvm/Config/config.h" -#include <stddef.h> -using namespace llvm; - -#if USE_OPROFILE - -#include <opagent.h> - -namespace { - -class OProfileJITEventListener : public JITEventListener { - op_agent_t Agent; -public: - OProfileJITEventListener(); - ~OProfileJITEventListener(); - - virtual void NotifyFunctionEmitted(const Function &F, - void *FnStart, size_t FnSize, - const EmittedFunctionDetails &Details); - virtual void NotifyFreeingMachineCode(void *OldPtr); -}; - -OProfileJITEventListener::OProfileJITEventListener() - : Agent(op_open_agent()) { - if (Agent == NULL) { - 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 (Agent != NULL) { - if (op_close_agent(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"); - } - } -} - -class FilenameCache { - // Holds the filename of each Scope, so that we can pass a null-terminated - // string into oprofile. Use an AssertingVH rather than a ValueMap because we - // shouldn't be modifying any MDNodes while this map is alive. - DenseMap<AssertingVH<MDNode>, std::string> Filenames; - - public: - const char *getFilename(MDNode *Scope) { - std::string &Filename = Filenames[Scope]; - if (Filename.empty()) { - Filename = DIScope(Scope).getFilename(); - } - return Filename.c_str(); - } -}; - -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 EmittedFunctionDetails &Details) { - assert(F.hasName() && FnStart != 0 && "Bad symbol to add"); - if (op_write_native_code(Agent, 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 (op_write_debug_line_info(Agent, 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 (op_unload_native_code(Agent, 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 *createOProfileJITEventListener() { - return new OProfileJITEventListener; -} -} - -#else // USE_OPROFILE - -namespace llvm { -// By defining this to return NULL, we can let clients call it unconditionally, -// even if they haven't configured with the OProfile libraries. -JITEventListener *createOProfileJITEventListener() { - return NULL; -} -} // namespace llvm - -#endif // USE_OPROFILE |