146 lines
4.5 KiB
C++
146 lines
4.5 KiB
C++
//===- DbgInfoPrinter.cpp - Print debug info in a human readable form -----==//
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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 implements a pass that prints instructions, and associated debug
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// info:
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// - source/line/col information
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// - original variable name
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// - original type name
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Pass.h"
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#include "llvm/Function.h"
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#include "llvm/Module.h"
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#include "llvm/Value.h"
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#include "llvm/IntrinsicInst.h"
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#include "llvm/Analysis/DebugInfo.h"
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#include "llvm/Analysis/Passes.h"
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#include "llvm/Analysis/ValueTracking.h"
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#include "llvm/Support/CFG.h"
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#include "llvm/Support/Compiler.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/raw_ostream.h"
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using namespace llvm;
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static cl::opt<bool>
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PrintDirectory("print-fullpath", cl::desc("Print fullpath when printing debug info"), cl::Hidden);
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namespace {
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struct VISIBILITY_HIDDEN PrintDbgInfo : public FunctionPass {
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private:
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raw_ostream &Out;
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void printStopPoint(const DbgStopPointInst *DSI);
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void printFuncStart(const DbgFuncStartInst *FS);
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void printVariableDeclaration(const Value *V);
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public:
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static char ID; // Pass identification
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PrintDbgInfo() : FunctionPass(&ID), Out(outs()) {}
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virtual bool runOnFunction(Function &F);
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virtual void getAnalysisUsage(AnalysisUsage &AU) const {
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AU.setPreservesAll();
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}
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};
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char PrintDbgInfo::ID = 0;
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static RegisterPass<PrintDbgInfo> X("print-dbginfo",
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"Print debug info in human readable form");
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}
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FunctionPass *llvm::createDbgInfoPrinterPass() { return new PrintDbgInfo(); }
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void PrintDbgInfo::printVariableDeclaration(const Value *V)
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{
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if(const DbgDeclareInst* DDI = findDbgDeclare(V)) {
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DIVariable Var(cast<GlobalVariable>(DDI->getVariable()));
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Out << "; variable " << Var.getName()
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<< " of type " << Var.getType().getName()
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<< " at line " << Var.getLineNumber() << "\n";
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}
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}
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void PrintDbgInfo::printStopPoint(const DbgStopPointInst *DSI)
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{
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if (PrintDirectory) {
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std::string dir;
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GetConstantStringInfo(DSI->getDirectory(), dir);
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Out << dir << "/";
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}
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std::string file;
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GetConstantStringInfo(DSI->getFileName(), file);
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Out << file << ":" << DSI->getLine();
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if (unsigned Col = DSI->getColumn()) {
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Out << ":" << Col;
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}
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}
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void PrintDbgInfo::printFuncStart(const DbgFuncStartInst *FS)
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{
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DISubprogram Subprogram(cast<GlobalVariable>(FS->getSubprogram()));
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Out << ";fully qualified function name: " << Subprogram.getDisplayName()
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<< " return type: " << Subprogram.getType().getName()
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<< " at line " << Subprogram.getLineNumber()
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<< "\n\n";
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}
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bool PrintDbgInfo::runOnFunction(Function &F)
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{
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if (F.isDeclaration())
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return false;
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Out << "function " << F.getName() << "\n\n";
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for (Function::iterator I = F.begin(), E = F.end(); I != E; ++I) {
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BasicBlock *BB = I;
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if (I != F.begin() && (pred_begin(BB) == pred_end(BB)))
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// Skip dead blocks.
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continue;
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const DbgStopPointInst *DSI = findBBStopPoint(BB);
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Out << BB->getName();
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Out << ":";
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if (DSI) {
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Out << "; (";
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printStopPoint(DSI);
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Out << ")";
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}
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Out << "\n";
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// A dbgstoppoint's information is valid until we encounter a new one.
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const DbgStopPointInst *LastDSP = DSI;
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bool printed = DSI != 0;
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for (BasicBlock::const_iterator i = BB->begin(), e = BB->end(); i != e; ++i) {
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if (isa<DbgInfoIntrinsic>(i)) {
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if ((DSI = dyn_cast<DbgStopPointInst>(i))) {
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if (DSI->getContext() == LastDSP->getContext() &&
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DSI->getLineValue() == LastDSP->getLineValue() &&
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DSI->getColumnValue() == LastDSP->getColumnValue()) {
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// Don't print same location twice.
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continue;
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}
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LastDSP = cast<DbgStopPointInst>(i);
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// Don't print consecutive stoppoints, use a flag
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// to know which one we printed.
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printed = false;
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} else if (const DbgFuncStartInst *FS = dyn_cast<DbgFuncStartInst>(i)) {
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printFuncStart(FS);
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}
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} else {
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if (!printed && LastDSP) {
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Out << "; ";
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printStopPoint(LastDSP);
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Out << "\n";
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printed = true;
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}
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Out << *i;
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printVariableDeclaration(i);
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}
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}
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}
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return false;
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}
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