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286 lines
9.6 KiB
C++
286 lines
9.6 KiB
C++
//===- Printer.cpp - Code for printing data structure graphs nicely -------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by the LLVM research group and is distributed under
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// the University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the 'dot' graph printer.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Analysis/DataStructure.h"
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#include "llvm/Analysis/DSGraph.h"
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#include "llvm/Analysis/DSGraphTraits.h"
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#include "llvm/Module.h"
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#include "llvm/Constants.h"
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#include "llvm/Assembly/Writer.h"
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#include "Support/CommandLine.h"
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#include "Support/GraphWriter.h"
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#include "Support/Statistic.h"
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#include <fstream>
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#include <sstream>
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using namespace llvm;
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// OnlyPrintMain - The DataStructure printer exposes this option to allow
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// printing of only the graph for "main".
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//
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namespace {
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cl::opt<bool> OnlyPrintMain("only-print-main-ds", cl::ReallyHidden);
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Statistic<> MaxGraphSize ("dsnode", "Maximum graph size");
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Statistic<> NumFoldedNodes ("dsnode", "Number of folded nodes (in final graph)");
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}
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void DSNode::dump() const { print(std::cerr, 0); }
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static std::string getCaption(const DSNode *N, const DSGraph *G) {
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std::stringstream OS;
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Module *M = 0;
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// Get the module from ONE of the functions in the graph it is available.
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if (G && !G->getReturnNodes().empty())
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M = G->getReturnNodes().begin()->first->getParent();
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if (N->isNodeCompletelyFolded())
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OS << "COLLAPSED";
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else {
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WriteTypeSymbolic(OS, N->getType(), M);
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if (N->isArray())
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OS << " array";
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}
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if (unsigned NodeType = N->getNodeFlags()) {
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OS << ": ";
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if (NodeType & DSNode::AllocaNode ) OS << "S";
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if (NodeType & DSNode::HeapNode ) OS << "H";
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if (NodeType & DSNode::GlobalNode ) OS << "G";
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if (NodeType & DSNode::UnknownNode) OS << "U";
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if (NodeType & DSNode::Incomplete ) OS << "I";
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if (NodeType & DSNode::Modified ) OS << "M";
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if (NodeType & DSNode::Read ) OS << "R";
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#ifndef NDEBUG
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if (NodeType & DSNode::DEAD ) OS << "<dead>";
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#endif
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OS << "\n";
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}
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for (unsigned i = 0, e = N->getGlobals().size(); i != e; ++i) {
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WriteAsOperand(OS, N->getGlobals()[i], false, true, M);
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OS << "\n";
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}
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return OS.str();
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}
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namespace llvm {
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template<>
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struct DOTGraphTraits<const DSGraph*> : public DefaultDOTGraphTraits {
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static std::string getGraphName(const DSGraph *G) {
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switch (G->getReturnNodes().size()) {
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case 0: return G->getFunctionNames();
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case 1: return "Function " + G->getFunctionNames();
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default: return "Functions: " + G->getFunctionNames();
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}
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}
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static const char *getGraphProperties(const DSGraph *G) {
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return "\tsize=\"10,7.5\";\n"
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"\trotate=\"90\";\n";
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}
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static std::string getNodeLabel(const DSNode *Node, const DSGraph *Graph) {
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return getCaption(Node, Graph);
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}
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static std::string getNodeAttributes(const DSNode *N) {
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return "shape=Mrecord";//fontname=Courier";
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}
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/// addCustomGraphFeatures - Use this graph writing hook to emit call nodes
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/// and the return node.
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///
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static void addCustomGraphFeatures(const DSGraph *G,
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GraphWriter<const DSGraph*> &GW) {
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Module *CurMod = 0;
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if (!G->getReturnNodes().empty())
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CurMod = G->getReturnNodes().begin()->first->getParent();
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// Add scalar nodes to the graph...
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const DSGraph::ScalarMapTy &VM = G->getScalarMap();
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for (DSGraph::ScalarMapTy::const_iterator I = VM.begin(); I != VM.end();++I)
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if (!isa<GlobalValue>(I->first) && !isa<ConstantPointerRef>(I->first)) {
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std::stringstream OS;
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WriteAsOperand(OS, I->first, false, true, CurMod);
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GW.emitSimpleNode(I->first, "", OS.str());
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// Add edge from return node to real destination
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int EdgeDest = I->second.getOffset() >> DS::PointerShift;
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if (EdgeDest == 0) EdgeDest = -1;
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GW.emitEdge(I->first, -1, I->second.getNode(),
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EdgeDest, "arrowtail=tee,color=gray63");
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}
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// Output the returned value pointer...
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const DSGraph::ReturnNodesTy &RetNodes = G->getReturnNodes();
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for (DSGraph::ReturnNodesTy::const_iterator I = RetNodes.begin(),
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E = RetNodes.end(); I != E; ++I)
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if (I->second.getNode()) {
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std::string Label;
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if (RetNodes.size() == 1)
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Label = "returning";
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else
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Label = I->first->getName() + " ret node";
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// Output the return node...
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GW.emitSimpleNode((void*)I->first, "plaintext=circle", Label);
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// Add edge from return node to real destination
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int RetEdgeDest = I->second.getOffset() >> DS::PointerShift;;
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if (RetEdgeDest == 0) RetEdgeDest = -1;
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GW.emitEdge((void*)I->first, -1, I->second.getNode(),
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RetEdgeDest, "arrowtail=tee,color=gray63");
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}
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// Output all of the call nodes...
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const std::vector<DSCallSite> &FCs =
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G->shouldPrintAuxCalls() ? G->getAuxFunctionCalls()
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: G->getFunctionCalls();
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for (unsigned i = 0, e = FCs.size(); i != e; ++i) {
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const DSCallSite &Call = FCs[i];
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std::vector<std::string> EdgeSourceCaptions(Call.getNumPtrArgs()+2);
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EdgeSourceCaptions[0] = "r";
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if (Call.isDirectCall())
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EdgeSourceCaptions[1] = Call.getCalleeFunc()->getName();
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else
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EdgeSourceCaptions[1] = "f";
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GW.emitSimpleNode(&Call, "shape=record", "call", Call.getNumPtrArgs()+2,
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&EdgeSourceCaptions);
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if (DSNode *N = Call.getRetVal().getNode()) {
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int EdgeDest = Call.getRetVal().getOffset() >> DS::PointerShift;
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if (EdgeDest == 0) EdgeDest = -1;
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GW.emitEdge(&Call, 0, N, EdgeDest, "color=gray63,tailclip=false");
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}
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// Print out the callee...
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if (Call.isIndirectCall()) {
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DSNode *N = Call.getCalleeNode();
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assert(N && "Null call site callee node!");
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GW.emitEdge(&Call, 1, N, -1, "color=gray63,tailclip=false");
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}
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for (unsigned j = 0, e = Call.getNumPtrArgs(); j != e; ++j)
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if (DSNode *N = Call.getPtrArg(j).getNode()) {
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int EdgeDest = Call.getPtrArg(j).getOffset() >> DS::PointerShift;
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if (EdgeDest == 0) EdgeDest = -1;
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GW.emitEdge(&Call, j+2, N, EdgeDest, "color=gray63,tailclip=false");
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}
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}
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}
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};
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} // end namespace llvm
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void DSNode::print(std::ostream &O, const DSGraph *G) const {
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GraphWriter<const DSGraph *> W(O, G);
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W.writeNode(this);
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}
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void DSGraph::print(std::ostream &O) const {
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WriteGraph(O, this, "DataStructures");
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}
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void DSGraph::writeGraphToFile(std::ostream &O,
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const std::string &GraphName) const {
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std::string Filename = GraphName + ".dot";
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O << "Writing '" << Filename << "'...";
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std::ofstream F(Filename.c_str());
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if (F.good()) {
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print(F);
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unsigned NumCalls = shouldPrintAuxCalls() ?
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getAuxFunctionCalls().size() : getFunctionCalls().size();
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O << " [" << getGraphSize() << "+" << NumCalls << "]\n";
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} else {
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O << " error opening file for writing!\n";
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}
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}
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/// viewGraph - Emit a dot graph, run 'dot', run gv on the postscript file,
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/// then cleanup. For use from the debugger.
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///
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void DSGraph::viewGraph() const {
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std::ofstream F("/tmp/tempgraph.dot");
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if (!F.good()) {
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std::cerr << "Error opening '/tmp/tempgraph.dot' for temporary graph!\n";
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return;
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}
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print(F);
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F.close();
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if (system("dot -Tps /tmp/tempgraph.dot > /tmp/tempgraph.ps"))
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std::cerr << "Error running dot: 'dot' not in path?\n";
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system("gv /tmp/tempgraph.ps");
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system("rm /tmp/tempgraph.dot /tmp/tempgraph.ps");
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}
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template <typename Collection>
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static void printCollection(const Collection &C, std::ostream &O,
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const Module *M, const std::string &Prefix) {
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if (M == 0) {
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O << "Null Module pointer, cannot continue!\n";
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return;
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}
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unsigned TotalNumNodes = 0, TotalCallNodes = 0;
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for (Module::const_iterator I = M->begin(), E = M->end(); I != E; ++I)
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if (C.hasGraph(*I)) {
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DSGraph &Gr = C.getDSGraph((Function&)*I);
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TotalNumNodes += Gr.getGraphSize();
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unsigned NumCalls = Gr.shouldPrintAuxCalls() ?
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Gr.getAuxFunctionCalls().size() : Gr.getFunctionCalls().size();
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TotalCallNodes += NumCalls;
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if (I->getName() == "main" || !OnlyPrintMain)
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Gr.writeGraphToFile(O, Prefix+I->getName());
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else {
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O << "Skipped Writing '" << Prefix+I->getName() << ".dot'... ["
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<< Gr.getGraphSize() << "+" << NumCalls << "]\n";
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}
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if (MaxGraphSize < Gr.getNodes().size())
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MaxGraphSize = Gr.getNodes().size();
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for (unsigned i = 0, e = Gr.getNodes().size(); i != e; ++i)
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if (Gr.getNodes()[i]->isNodeCompletelyFolded())
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++NumFoldedNodes;
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}
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DSGraph &GG = C.getGlobalsGraph();
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TotalNumNodes += GG.getGraphSize();
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TotalCallNodes += GG.getFunctionCalls().size();
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if (!OnlyPrintMain) {
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GG.writeGraphToFile(O, Prefix+"GlobalsGraph");
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} else {
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O << "Skipped Writing '" << Prefix << "GlobalsGraph.dot'... ["
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<< GG.getGraphSize() << "+" << GG.getFunctionCalls().size() << "]\n";
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}
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O << "\nGraphs contain [" << TotalNumNodes << "+" << TotalCallNodes
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<< "] nodes total" << std::endl;
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}
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// print - Print out the analysis results...
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void LocalDataStructures::print(std::ostream &O, const Module *M) const {
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printCollection(*this, O, M, "ds.");
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}
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void BUDataStructures::print(std::ostream &O, const Module *M) const {
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printCollection(*this, O, M, "bu.");
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}
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void TDDataStructures::print(std::ostream &O, const Module *M) const {
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printCollection(*this, O, M, "td.");
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}
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