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dd9f8bbc20
USE_OPROFILE to 0 on some paths through configure, which does the wrong thing with #if defined(). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75300 91177308-0d34-0410-b5e6-96231b3b80d8
110 lines
3.5 KiB
C++
110 lines
3.5 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 calls into OProfile to tell
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// it about JITted functions. For now, we only record function names and sizes,
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// but eventually we'll also record line number information.
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//
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// See http://oprofile.sourceforge.net/doc/devel/jit-interface.html for the
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// definition of the interface we're using.
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//
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//===----------------------------------------------------------------------===//
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#define DEBUG_TYPE "oprofile-jit-event-listener"
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#include "llvm/Function.h"
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#include "llvm/ExecutionEngine/JITEventListener.h"
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#include "llvm/Support/Debug.h"
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#include "llvm/System/Errno.h"
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#include "llvm/Config/config.h"
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#include <stddef.h>
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using namespace llvm;
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#if USE_OPROFILE
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#include <opagent.h>
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namespace {
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class OProfileJITEventListener : public JITEventListener {
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op_agent_t Agent;
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public:
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OProfileJITEventListener();
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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 EmittedFunctionDetails &Details);
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virtual void NotifyFreeingMachineCode(const Function &F, void *OldPtr);
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};
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OProfileJITEventListener::OProfileJITEventListener()
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: Agent(op_open_agent()) {
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if (Agent == NULL) {
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const std::string err_str = sys::StrError();
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DOUT << "Failed to connect to OProfile agent: " << err_str << "\n";
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} else {
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DOUT << "Connected to OProfile agent.\n";
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}
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}
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OProfileJITEventListener::~OProfileJITEventListener() {
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if (Agent != NULL) {
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if (op_close_agent(Agent) == -1) {
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const std::string err_str = sys::StrError();
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DOUT << "Failed to disconnect from OProfile agent: " << err_str << "\n";
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} else {
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DOUT << "Disconnected from OProfile agent.\n";
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}
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}
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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 EmittedFunctionDetails &) {
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const char *const FnName = F.getNameStart();
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assert(FnName != 0 && FnStart != 0 && "Bad symbol to add");
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if (op_write_native_code(Agent, FnName,
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reinterpret_cast<uint64_t>(FnStart),
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FnStart, FnSize) == -1) {
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DOUT << "Failed to tell OProfile about native function " << FnName
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<< " at [" << FnStart << "-" << ((char*)FnStart + FnSize) << "]\n";
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}
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}
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// Removes the to-be-deleted function from the symbol table.
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void OProfileJITEventListener::NotifyFreeingMachineCode(
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const Function &F, void *FnStart) {
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assert(FnStart && "Invalid function pointer");
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if (op_unload_native_code(Agent, reinterpret_cast<uint64_t>(FnStart)) == -1) {
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DOUT << "Failed to tell OProfile about unload of native function "
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<< F.getName() << " at " << 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 *createOProfileJITEventListener() {
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return new OProfileJITEventListener;
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}
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}
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#else // USE_OPROFILE
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namespace llvm {
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// By defining this to return NULL, we can let clients call it unconditionally,
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// even if they haven't configured with the OProfile libraries.
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JITEventListener *createOProfileJITEventListener() {
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return NULL;
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}
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} // namespace llvm
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#endif // USE_OPROFILE
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