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
13 // - source/line/col information
14 // - original variable name
15 // - original type name
17 //===----------------------------------------------------------------------===//
19 #include "llvm/Pass.h"
20 #include "llvm/Function.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/CommandLine.h"
28 #include "llvm/Support/raw_ostream.h"
33 PrintDirectory("print-fullpath",
34 cl::desc("Print fullpath when printing debug info"),
38 class PrintDbgInfo : public FunctionPass {
40 void printStopPoint(const DbgStopPointInst *DSI);
41 void printFuncStart(const DbgFuncStartInst *FS);
42 void printVariableDeclaration(const Value *V);
44 static char ID; // Pass identification
45 PrintDbgInfo() : FunctionPass(&ID), Out(outs()) {}
47 virtual bool runOnFunction(Function &F);
48 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
52 char PrintDbgInfo::ID = 0;
53 static RegisterPass<PrintDbgInfo> X("print-dbginfo",
54 "Print debug info in human readable form");
57 FunctionPass *llvm::createDbgInfoPrinterPass() { return new PrintDbgInfo(); }
59 void PrintDbgInfo::printVariableDeclaration(const Value *V) {
60 std::string DisplayName, File, Directory, Type;
63 if (!getLocationInfo(V, DisplayName, Type, LineNo, File, Directory))
67 WriteAsOperand(Out, V, false, 0);
68 Out << " is variable " << DisplayName
69 << " of type " << Type << " declared at ";
72 Out << Directory << "/";
74 Out << File << ":" << LineNo << "\n";
77 void PrintDbgInfo::printStopPoint(const DbgStopPointInst *DSI) {
80 GetConstantStringInfo(DSI->getDirectory(), dir);
85 GetConstantStringInfo(DSI->getFileName(), file);
86 Out << file << ":" << DSI->getLine();
88 if (unsigned Col = DSI->getColumn())
92 void PrintDbgInfo::printFuncStart(const DbgFuncStartInst *FS) {
93 DISubprogram Subprogram(FS->getSubprogram());
94 Out << "; fully qualified function name: " << Subprogram.getDisplayName()
95 << " return type: " << Subprogram.getReturnTypeName()
96 << " at line " << Subprogram.getLineNumber()
100 bool PrintDbgInfo::runOnFunction(Function &F) {
101 if (F.isDeclaration())
104 Out << "function " << F.getName() << "\n\n";
106 for (Function::iterator I = F.begin(), E = F.end(); I != E; ++I) {
109 if (I != F.begin() && (pred_begin(BB) == pred_end(BB)))
113 const DbgStopPointInst *DSI = findBBStopPoint(BB);
114 Out << BB->getName();
125 // A dbgstoppoint's information is valid until we encounter a new one.
126 const DbgStopPointInst *LastDSP = DSI;
127 bool Printed = DSI != 0;
128 for (BasicBlock::const_iterator i = BB->begin(), e = BB->end();
130 if (isa<DbgInfoIntrinsic>(i)) {
131 if ((DSI = dyn_cast<DbgStopPointInst>(i))) {
132 if (DSI->getContext() == LastDSP->getContext() &&
133 DSI->getLineValue() == LastDSP->getLineValue() &&
134 DSI->getColumnValue() == LastDSP->getColumnValue())
135 // Don't print same location twice.
138 LastDSP = cast<DbgStopPointInst>(i);
140 // Don't print consecutive stoppoints, use a flag to know which one we
143 } else if (const DbgFuncStartInst *FS = dyn_cast<DbgFuncStartInst>(i)) {
147 if (!Printed && LastDSP) {
149 printStopPoint(LastDSP);
155 printVariableDeclaration(i);
157 if (const User *U = dyn_cast<User>(i)) {
158 for(unsigned i=0;i<U->getNumOperands();i++)
159 printVariableDeclaration(U->getOperand(i));