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https://github.com/c64scene-ar/llvm-6502.git
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include/llvm/Analysis/DebugInfo.h to include/llvm/DebugInfo.h. The reasoning is because the DebugInfo module is simply an interface to the debug info MDNodes and has nothing to do with analysis. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@159312 91177308-0d34-0410-b5e6-96231b3b80d8
225 lines
6.3 KiB
C++
225 lines
6.3 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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//
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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/DebugInfo.h"
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#include "llvm/Function.h"
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#include "llvm/IntrinsicInst.h"
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#include "llvm/Metadata.h"
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#include "llvm/Module.h"
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#include "llvm/Pass.h"
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#include "llvm/Analysis/Passes.h"
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#include "llvm/Assembly/Writer.h"
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#include "llvm/Support/CFG.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",
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cl::desc("Print fullpath when printing debug info"),
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cl::Hidden);
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namespace {
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class PrintDbgInfo : public FunctionPass {
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raw_ostream &Out;
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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(errs()) {
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initializePrintDbgInfoPass(*PassRegistry::getPassRegistry());
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}
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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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}
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INITIALIZE_PASS(PrintDbgInfo, "print-dbginfo",
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"Print debug info in human readable form", false, false)
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FunctionPass *llvm::createDbgInfoPrinterPass() { return new PrintDbgInfo(); }
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/// Find the debug info descriptor corresponding to this global variable.
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static Value *findDbgGlobalDeclare(GlobalVariable *V) {
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const Module *M = V->getParent();
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NamedMDNode *NMD = M->getNamedMetadata("llvm.dbg.gv");
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if (!NMD)
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return 0;
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for (unsigned i = 0, e = NMD->getNumOperands(); i != e; ++i) {
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DIDescriptor DIG(cast<MDNode>(NMD->getOperand(i)));
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if (!DIG.isGlobalVariable())
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continue;
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if (DIGlobalVariable(DIG).getGlobal() == V)
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return DIG;
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}
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return 0;
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}
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/// Find the debug info descriptor corresponding to this function.
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static Value *findDbgSubprogramDeclare(Function *V) {
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const Module *M = V->getParent();
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NamedMDNode *NMD = M->getNamedMetadata("llvm.dbg.sp");
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if (!NMD)
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return 0;
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for (unsigned i = 0, e = NMD->getNumOperands(); i != e; ++i) {
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DIDescriptor DIG(cast<MDNode>(NMD->getOperand(i)));
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if (!DIG.isSubprogram())
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continue;
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if (DISubprogram(DIG).getFunction() == V)
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return DIG;
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}
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return 0;
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}
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/// Finds the llvm.dbg.declare intrinsic corresponding to this value if any.
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/// It looks through pointer casts too.
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static const DbgDeclareInst *findDbgDeclare(const Value *V) {
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V = V->stripPointerCasts();
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if (!isa<Instruction>(V) && !isa<Argument>(V))
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return 0;
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const Function *F = NULL;
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if (const Instruction *I = dyn_cast<Instruction>(V))
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F = I->getParent()->getParent();
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else if (const Argument *A = dyn_cast<Argument>(V))
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F = A->getParent();
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for (Function::const_iterator FI = F->begin(), FE = F->end(); FI != FE; ++FI)
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for (BasicBlock::const_iterator BI = (*FI).begin(), BE = (*FI).end();
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BI != BE; ++BI)
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if (const DbgDeclareInst *DDI = dyn_cast<DbgDeclareInst>(BI))
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if (DDI->getAddress() == V)
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return DDI;
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return 0;
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}
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static bool getLocationInfo(const Value *V, std::string &DisplayName,
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std::string &Type, unsigned &LineNo,
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std::string &File, std::string &Dir) {
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DICompileUnit Unit;
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DIType TypeD;
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if (GlobalVariable *GV = dyn_cast<GlobalVariable>(const_cast<Value*>(V))) {
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Value *DIGV = findDbgGlobalDeclare(GV);
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if (!DIGV) return false;
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DIGlobalVariable Var(cast<MDNode>(DIGV));
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StringRef D = Var.getDisplayName();
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if (!D.empty())
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DisplayName = D;
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LineNo = Var.getLineNumber();
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Unit = Var.getCompileUnit();
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TypeD = Var.getType();
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} else if (Function *F = dyn_cast<Function>(const_cast<Value*>(V))){
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Value *DIF = findDbgSubprogramDeclare(F);
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if (!DIF) return false;
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DISubprogram Var(cast<MDNode>(DIF));
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StringRef D = Var.getDisplayName();
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if (!D.empty())
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DisplayName = D;
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LineNo = Var.getLineNumber();
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Unit = Var.getCompileUnit();
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TypeD = Var.getType();
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} else {
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const DbgDeclareInst *DDI = findDbgDeclare(V);
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if (!DDI) return false;
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DIVariable Var(cast<MDNode>(DDI->getVariable()));
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StringRef D = Var.getName();
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if (!D.empty())
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DisplayName = D;
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LineNo = Var.getLineNumber();
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Unit = Var.getCompileUnit();
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TypeD = Var.getType();
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}
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StringRef T = TypeD.getName();
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if (!T.empty())
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Type = T;
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StringRef F = Unit.getFilename();
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if (!F.empty())
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File = F;
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StringRef D = Unit.getDirectory();
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if (!D.empty())
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Dir = D;
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return true;
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}
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void PrintDbgInfo::printVariableDeclaration(const Value *V) {
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std::string DisplayName, File, Directory, Type;
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unsigned LineNo = 0;
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if (!getLocationInfo(V, DisplayName, Type, LineNo, File, Directory))
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return;
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Out << "; ";
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WriteAsOperand(Out, V, false, 0);
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if (isa<Function>(V))
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Out << " is function " << DisplayName
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<< " of type " << Type << " declared at ";
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else
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Out << " is variable " << DisplayName
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<< " of type " << Type << " declared at ";
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if (PrintDirectory)
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Out << Directory << "/";
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Out << File << ":" << LineNo << "\n";
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}
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bool PrintDbgInfo::runOnFunction(Function &F) {
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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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Out << BB->getName();
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Out << ":";
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Out << "\n";
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for (BasicBlock::const_iterator i = BB->begin(), e = BB->end();
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i != e; ++i) {
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printVariableDeclaration(i);
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if (const User *U = dyn_cast<User>(i)) {
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for(unsigned i=0;i<U->getNumOperands();i++)
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printVariableDeclaration(U->getOperand(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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