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ac19c888b2
Gut all the non-pointer API from the variable wrappers, except an implicit conversion from `DIGlobalVariable` to `DIDescriptor`. Note that if you're updating out-of-tree code, `DIVariable` wraps `MDLocalVariable` (`MDVariable` is a common base class shared with `MDGlobalVariable`). llvm-svn: 234840
127 lines
3.9 KiB
C++
127 lines
3.9 KiB
C++
//===-- ModuleDebugInfoPrinter.cpp - Prints module debug info metadata ----===//
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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 pass decodes the debug info metadata in a module and prints in a
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// (sufficiently-prepared-) human-readable form.
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//
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// For example, run this pass from opt along with the -analyze option, and
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// it'll print to standard output.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Analysis/Passes.h"
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#include "llvm/ADT/Statistic.h"
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#include "llvm/IR/DebugInfo.h"
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#include "llvm/IR/Function.h"
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#include "llvm/Pass.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/raw_ostream.h"
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using namespace llvm;
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namespace {
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class ModuleDebugInfoPrinter : public ModulePass {
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DebugInfoFinder Finder;
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public:
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static char ID; // Pass identification, replacement for typeid
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ModuleDebugInfoPrinter() : ModulePass(ID) {
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initializeModuleDebugInfoPrinterPass(*PassRegistry::getPassRegistry());
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}
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bool runOnModule(Module &M) override;
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void getAnalysisUsage(AnalysisUsage &AU) const override {
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AU.setPreservesAll();
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}
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void print(raw_ostream &O, const Module *M) const override;
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};
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}
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char ModuleDebugInfoPrinter::ID = 0;
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INITIALIZE_PASS(ModuleDebugInfoPrinter, "module-debuginfo",
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"Decodes module-level debug info", false, true)
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ModulePass *llvm::createModuleDebugInfoPrinterPass() {
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return new ModuleDebugInfoPrinter();
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}
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bool ModuleDebugInfoPrinter::runOnModule(Module &M) {
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Finder.processModule(M);
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return false;
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}
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static void printFile(raw_ostream &O, StringRef Filename, StringRef Directory,
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unsigned Line = 0) {
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if (Filename.empty())
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return;
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O << " from ";
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if (!Directory.empty())
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O << Directory << "/";
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O << Filename;
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if (Line)
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O << ":" << Line;
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}
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void ModuleDebugInfoPrinter::print(raw_ostream &O, const Module *M) const {
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// Printing the nodes directly isn't particularly helpful (since they
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// reference other nodes that won't be printed, particularly for the
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// filenames), so just print a few useful things.
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for (DICompileUnit CU : Finder.compile_units()) {
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O << "Compile unit: ";
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if (const char *Lang = LanguageString(CU.getLanguage()))
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O << Lang;
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else
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O << "unknown-language(" << CU.getLanguage() << ")";
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printFile(O, CU.getFilename(), CU.getDirectory());
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O << '\n';
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}
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for (DISubprogram S : Finder.subprograms()) {
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O << "Subprogram: " << S.getName();
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printFile(O, S.getFilename(), S.getDirectory(), S.getLineNumber());
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if (!S.getLinkageName().empty())
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O << " ('" << S.getLinkageName() << "')";
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O << '\n';
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}
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for (DIGlobalVariable GV : Finder.global_variables()) {
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O << "Global variable: " << GV->getName();
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printFile(O, GV->getFilename(), GV->getDirectory(), GV->getLine());
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if (!GV->getLinkageName().empty())
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O << " ('" << GV->getLinkageName() << "')";
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O << '\n';
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}
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for (DIType T : Finder.types()) {
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O << "Type:";
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if (!T.getName().empty())
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O << ' ' << T.getName();
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printFile(O, T.getFilename(), T.getDirectory(), T.getLineNumber());
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if (DIBasicType BT = dyn_cast<MDBasicType>(T)) {
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O << " ";
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if (const char *Encoding =
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dwarf::AttributeEncodingString(BT.getEncoding()))
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O << Encoding;
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else
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O << "unknown-encoding(" << BT.getEncoding() << ')';
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} else {
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O << ' ';
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if (const char *Tag = dwarf::TagString(T.getTag()))
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O << Tag;
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else
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O << "unknown-tag(" << T.getTag() << ")";
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}
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if (DICompositeType CT = dyn_cast<MDCompositeType>(T)) {
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if (auto *S = CT.getIdentifier())
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O << " (identifier: '" << S->getString() << "')";
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}
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O << '\n';
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}
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}
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