1 //===- DbgInfoPrinter.cpp - Print debug info in a human readable form -----==//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements a pass that prints instructions, and associated debug
12 // - source/line/col information
13 // - original variable name
14 // - original type name
16 //===----------------------------------------------------------------------===//
17 #include "llvm/Pass.h"
18 #include "llvm/Function.h"
19 #include "llvm/Module.h"
20 #include "llvm/Value.h"
21 #include "llvm/IntrinsicInst.h"
22 #include "llvm/Assembly/Writer.h"
23 #include "llvm/Analysis/DebugInfo.h"
24 #include "llvm/Analysis/Passes.h"
25 #include "llvm/Analysis/ValueTracking.h"
26 #include "llvm/Support/CFG.h"
27 #include "llvm/Support/Compiler.h"
28 #include "llvm/Support/CommandLine.h"
29 #include "llvm/Support/raw_ostream.h"
33 PrintDirectory("print-fullpath", cl::desc("Print fullpath when printing debug info"), cl::Hidden);
36 struct VISIBILITY_HIDDEN PrintDbgInfo : public FunctionPass {
39 void printStopPoint(const DbgStopPointInst *DSI);
40 void printFuncStart(const DbgFuncStartInst *FS);
41 void printVariableDeclaration(const Value *V);
43 static char ID; // Pass identification
44 PrintDbgInfo() : FunctionPass(&ID), Out(outs()) {}
46 virtual bool runOnFunction(Function &F);
47 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
51 char PrintDbgInfo::ID = 0;
52 static RegisterPass<PrintDbgInfo> X("print-dbginfo",
53 "Print debug info in human readable form");
56 FunctionPass *llvm::createDbgInfoPrinterPass() { return new PrintDbgInfo(); }
58 void PrintDbgInfo::printVariableDeclaration(const Value *V) {
59 std::string DisplayName, File, Directory, Type;
61 if (getLocationInfo(V, DisplayName, Type, LineNo, File, Directory)) {
63 WriteAsOperand(Out, V, false, 0);
64 Out << " is variable " << DisplayName
65 << " of type " << Type << " declared at ";
67 Out << Directory << "/";
69 Out << File << ":" << LineNo << "\n";
73 void PrintDbgInfo::printStopPoint(const DbgStopPointInst *DSI)
76 const char *Dir = GetConstantStringInfo(DSI->getDirectory());
77 Out << (Dir ? Dir : "") << "/";
80 const char *FN = GetConstantStringInfo(DSI->getFileName());
81 Out << (FN ? FN : "") << ":" << DSI->getLine();
83 if (unsigned Col = DSI->getColumn())
87 void PrintDbgInfo::printFuncStart(const DbgFuncStartInst *FS)
89 DISubprogram Subprogram(cast<GlobalVariable>(FS->getSubprogram()));
90 Out << ";fully qualified function name: " << Subprogram.getDisplayName()
91 << " return type: " << Subprogram.getType().getName()
92 << " at line " << Subprogram.getLineNumber()
96 bool PrintDbgInfo::runOnFunction(Function &F)
98 if (F.isDeclaration())
100 Out << "function " << F.getName() << "\n\n";
101 for (Function::iterator I = F.begin(), E = F.end(); I != E; ++I) {
103 if (I != F.begin() && (pred_begin(BB) == pred_end(BB)))
106 const DbgStopPointInst *DSI = findBBStopPoint(BB);
107 Out << BB->getName();
115 // A dbgstoppoint's information is valid until we encounter a new one.
116 const DbgStopPointInst *LastDSP = DSI;
117 bool printed = DSI != 0;
118 for (BasicBlock::const_iterator i = BB->begin(), e = BB->end(); i != e; ++i) {
119 if (isa<DbgInfoIntrinsic>(i)) {
120 if ((DSI = dyn_cast<DbgStopPointInst>(i))) {
122 if (DSI->getContext() == LastDSP->getContext() &&
123 DSI->getLineValue() == LastDSP->getLineValue() &&
124 DSI->getColumnValue() == LastDSP->getColumnValue()) {
125 // Don't print same location twice.
128 LastDSP = cast<DbgStopPointInst>(i);
129 // Don't print consecutive stoppoints, use a flag
130 // to know which one we printed.
133 } else if (const DbgFuncStartInst *FS = dyn_cast<DbgFuncStartInst>(i)) {
137 if (!printed && LastDSP) {
139 printStopPoint(LastDSP);
144 printVariableDeclaration(i);
145 if (const User *U = dyn_cast<User>(i)) {
146 for(unsigned i=0;i<U->getNumOperands();i++) {
147 printVariableDeclaration(U->getOperand(i));