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313 lines
9.1 KiB
C++
313 lines
9.1 KiB
C++
//===-- llvm/Support/GraphWriter.h - Write graph to a .dot file -*- C++ -*-===//
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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 simple interface that can be used to print out generic
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// LLVM graphs to ".dot" files. "dot" is a tool that is part of the AT&T
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// graphviz package (http://www.research.att.com/sw/tools/graphviz/) which can
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// be used to turn the files output by this interface into a variety of
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// different graphics formats.
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//
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// Graphs do not need to implement any interface past what is already required
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// by the GraphTraits template, but they can choose to implement specializations
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// of the DOTGraphTraits template if they want to customize the graphs output in
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// any way.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_SUPPORT_GRAPHWRITER_H
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#define LLVM_SUPPORT_GRAPHWRITER_H
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#include "llvm/Support/Debug.h"
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#include "llvm/Support/DOTGraphTraits.h"
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#include "llvm/ADT/GraphTraits.h"
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#include "llvm/System/Path.h"
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#include <fstream>
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#include <vector>
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namespace llvm {
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namespace DOT { // Private functions...
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inline std::string EscapeString(const std::string &Label) {
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std::string Str(Label);
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for (unsigned i = 0; i != Str.length(); ++i)
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switch (Str[i]) {
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case '\n':
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Str.insert(Str.begin()+i, '\\'); // Escape character...
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++i;
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Str[i] = 'n';
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break;
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case '\t':
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Str.insert(Str.begin()+i, ' '); // Convert to two spaces
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++i;
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Str[i] = ' ';
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break;
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case '\\':
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if (i+1 != Str.length() && Str[i+1] == 'l')
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break; // don't disturb \l
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case '{': case '}':
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case '<': case '>':
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case '|': case '"':
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Str.insert(Str.begin()+i, '\\'); // Escape character...
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++i; // don't infinite loop
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break;
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}
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return Str;
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}
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}
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void DisplayGraph(const sys::Path& Filename);
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template<typename GraphType>
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class GraphWriter {
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std::ostream &O;
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const GraphType &G;
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typedef DOTGraphTraits<GraphType> DOTTraits;
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typedef GraphTraits<GraphType> GTraits;
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typedef typename GTraits::NodeType NodeType;
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typedef typename GTraits::nodes_iterator node_iterator;
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typedef typename GTraits::ChildIteratorType child_iterator;
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public:
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GraphWriter(std::ostream &o, const GraphType &g) : O(o), G(g) {}
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void writeHeader(const std::string &Name) {
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if (Name.empty())
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O << "digraph foo {\n"; // Graph name doesn't matter
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else
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O << "digraph " << Name << " {\n";
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if (DOTTraits::renderGraphFromBottomUp())
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O << "\trankdir=\"BT\";\n";
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std::string GraphName = DOTTraits::getGraphName(G);
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if (!GraphName.empty())
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O << "\tlabel=\"" << DOT::EscapeString(GraphName) << "\";\n";
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O << DOTTraits::getGraphProperties(G);
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O << "\n";
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}
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void writeFooter() {
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// Finish off the graph
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O << "}\n";
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}
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void writeNodes() {
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// Loop over the graph, printing it out...
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for (node_iterator I = GTraits::nodes_begin(G), E = GTraits::nodes_end(G);
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I != E; ++I)
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writeNode(*I);
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}
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void writeNode(NodeType& Node) {
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writeNode(&Node);
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}
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void writeNode(NodeType *const *Node) {
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writeNode(*Node);
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}
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void writeNode(NodeType *Node) {
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std::string NodeAttributes = DOTTraits::getNodeAttributes(Node, G);
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O << "\tNode" << reinterpret_cast<const void*>(Node) << " [shape=record,";
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if (!NodeAttributes.empty()) O << NodeAttributes << ",";
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O << "label=\"{";
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if (!DOTTraits::renderGraphFromBottomUp()) {
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O << DOT::EscapeString(DOTTraits::getNodeLabel(Node, G));
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// If we should include the address of the node in the label, do so now.
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if (DOTTraits::hasNodeAddressLabel(Node, G))
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O << "|" << (void*)Node;
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}
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// Print out the fields of the current node...
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child_iterator EI = GTraits::child_begin(Node);
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child_iterator EE = GTraits::child_end(Node);
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if (EI != EE) {
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if (!DOTTraits::renderGraphFromBottomUp()) O << "|";
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O << "{";
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for (unsigned i = 0; EI != EE && i != 64; ++EI, ++i) {
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if (i) O << "|";
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O << "<g" << i << ">" << DOTTraits::getEdgeSourceLabel(Node, EI);
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}
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if (EI != EE)
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O << "|<g64>truncated...";
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O << "}";
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if (DOTTraits::renderGraphFromBottomUp()) O << "|";
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}
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if (DOTTraits::renderGraphFromBottomUp()) {
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O << DOT::EscapeString(DOTTraits::getNodeLabel(Node, G));
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// If we should include the address of the node in the label, do so now.
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if (DOTTraits::hasNodeAddressLabel(Node, G))
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O << "|" << (void*)Node;
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}
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O << "}\"];\n"; // Finish printing the "node" line
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// Output all of the edges now
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EI = GTraits::child_begin(Node);
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for (unsigned i = 0; EI != EE && i != 64; ++EI, ++i)
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writeEdge(Node, i, EI);
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for (; EI != EE; ++EI)
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writeEdge(Node, 64, EI);
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}
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void writeEdge(NodeType *Node, unsigned edgeidx, child_iterator EI) {
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if (NodeType *TargetNode = *EI) {
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int DestPort = -1;
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if (DOTTraits::edgeTargetsEdgeSource(Node, EI)) {
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child_iterator TargetIt = DOTTraits::getEdgeTarget(Node, EI);
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// Figure out which edge this targets...
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unsigned Offset = std::distance(GTraits::child_begin(TargetNode),
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TargetIt);
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DestPort = static_cast<int>(Offset);
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}
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emitEdge(reinterpret_cast<const void*>(Node), edgeidx,
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reinterpret_cast<const void*>(TargetNode), DestPort,
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DOTTraits::getEdgeAttributes(Node, EI));
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}
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}
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/// emitSimpleNode - Outputs a simple (non-record) node
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void emitSimpleNode(const void *ID, const std::string &Attr,
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const std::string &Label, unsigned NumEdgeSources = 0,
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const std::vector<std::string> *EdgeSourceLabels = 0) {
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O << "\tNode" << ID << "[ ";
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if (!Attr.empty())
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O << Attr << ",";
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O << " label =\"";
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if (NumEdgeSources) O << "{";
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O << DOT::EscapeString(Label);
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if (NumEdgeSources) {
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O << "|{";
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for (unsigned i = 0; i != NumEdgeSources; ++i) {
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if (i) O << "|";
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O << "<g" << i << ">";
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if (EdgeSourceLabels) O << (*EdgeSourceLabels)[i];
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}
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O << "}}";
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}
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O << "\"];\n";
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}
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/// emitEdge - Output an edge from a simple node into the graph...
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void emitEdge(const void *SrcNodeID, int SrcNodePort,
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const void *DestNodeID, int DestNodePort,
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const std::string &Attrs) {
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if (SrcNodePort > 64) return; // Eminating from truncated part?
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if (DestNodePort > 64) DestNodePort = 64; // Targetting the truncated part?
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O << "\tNode" << SrcNodeID;
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if (SrcNodePort >= 0)
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O << ":g" << SrcNodePort;
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O << " -> Node" << reinterpret_cast<const void*>(DestNodeID);
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if (DestNodePort >= 0)
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O << ":g" << DestNodePort;
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if (!Attrs.empty())
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O << "[" << Attrs << "]";
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O << ";\n";
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}
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};
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template<typename GraphType>
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std::ostream &WriteGraph(std::ostream &O, const GraphType &G,
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const std::string &Name = "") {
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// Start the graph emission process...
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GraphWriter<GraphType> W(O, G);
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// Output the header for the graph...
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W.writeHeader(Name);
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// Emit all of the nodes in the graph...
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W.writeNodes();
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// Output any customizations on the graph
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DOTGraphTraits<GraphType>::addCustomGraphFeatures(G, W);
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// Output the end of the graph
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W.writeFooter();
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return O;
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}
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template<typename GraphType>
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sys::Path WriteGraph(const GraphType &G,
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const std::string& Name,
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const std::string& Title = "") {
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std::string ErrMsg;
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sys::Path Filename = sys::Path::GetTemporaryDirectory(&ErrMsg);
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if (Filename.isEmpty()) {
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cerr << "Error: " << ErrMsg << "\n";
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return Filename;
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}
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Filename.appendComponent(Name + ".dot");
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if (Filename.makeUnique(true,&ErrMsg)) {
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cerr << "Error: " << ErrMsg << "\n";
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return sys::Path();
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}
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cerr << "Writing '" << Filename << "'... ";
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std::ofstream O(Filename.c_str());
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if (O.good()) {
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// Start the graph emission process...
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GraphWriter<GraphType> W(O, G);
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// Output the header for the graph...
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W.writeHeader(Title);
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// Emit all of the nodes in the graph...
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W.writeNodes();
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// Output any customizations on the graph
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DOTGraphTraits<GraphType>::addCustomGraphFeatures(G, W);
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// Output the end of the graph
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W.writeFooter();
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cerr << " done. \n";
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O.close();
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} else {
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cerr << "error opening file for writing!\n";
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Filename.clear();
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}
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return Filename;
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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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template<typename GraphType>
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void ViewGraph(const GraphType& G,
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const std::string& Name,
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const std::string& Title = "") {
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sys::Path Filename = WriteGraph(G, Name, Title);
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if (Filename.isEmpty()) {
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return;
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}
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DisplayGraph(Filename);
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}
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} // End llvm namespace
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#endif
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