147 lines
4.6 KiB
C++
147 lines
4.6 KiB
C++
//===- ShowEnabledWarnings - diagtool tool for printing enabled flags -----===//
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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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#include "DiagTool.h"
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#include "DiagnosticNames.h"
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#include "clang/Basic/LLVM.h"
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#include "clang/Frontend/CompilerInstance.h"
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#include "clang/Frontend/TextDiagnosticBuffer.h"
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#include "clang/Frontend/TextDiagnosticPrinter.h"
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#include "clang/Frontend/Utils.h"
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#include "llvm/Support/TargetSelect.h"
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DEF_DIAGTOOL("show-enabled",
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"Show which warnings are enabled for a given command line",
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ShowEnabledWarnings)
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using namespace clang;
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using namespace diagtool;
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namespace {
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struct PrettyDiag {
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StringRef Name;
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StringRef Flag;
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DiagnosticsEngine::Level Level;
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PrettyDiag(StringRef name, StringRef flag, DiagnosticsEngine::Level level)
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: Name(name), Flag(flag), Level(level) {}
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bool operator<(const PrettyDiag &x) const { return Name < x.Name; }
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};
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}
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static void printUsage() {
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llvm::errs() << "Usage: diagtool show-enabled [<flags>] <single-input.c>\n";
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}
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static char getCharForLevel(DiagnosticsEngine::Level Level) {
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switch (Level) {
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case DiagnosticsEngine::Ignored: return ' ';
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case DiagnosticsEngine::Note: return '-';
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case DiagnosticsEngine::Warning: return 'W';
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case DiagnosticsEngine::Error: return 'E';
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case DiagnosticsEngine::Fatal: return 'F';
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}
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llvm_unreachable("Unknown diagnostic level");
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}
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static IntrusiveRefCntPtr<DiagnosticsEngine>
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createDiagnostics(unsigned int argc, char **argv) {
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IntrusiveRefCntPtr<DiagnosticIDs> DiagIDs(new DiagnosticIDs());
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// Buffer diagnostics from argument parsing so that we can output them using a
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// well formed diagnostic object.
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TextDiagnosticBuffer *DiagsBuffer = new TextDiagnosticBuffer;
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IntrusiveRefCntPtr<DiagnosticsEngine> InterimDiags(
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new DiagnosticsEngine(DiagIDs, new DiagnosticOptions(), DiagsBuffer));
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// Try to build a CompilerInvocation.
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OwningPtr<CompilerInvocation> Invocation(
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createInvocationFromCommandLine(ArrayRef<const char *>(argv, argc),
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InterimDiags));
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if (!Invocation)
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return NULL;
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// Build the diagnostics parser
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IntrusiveRefCntPtr<DiagnosticsEngine> FinalDiags =
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CompilerInstance::createDiagnostics(&Invocation->getDiagnosticOpts());
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if (!FinalDiags)
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return NULL;
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// Flush any errors created when initializing everything. This could happen
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// for invalid command lines, which will probably give non-sensical results.
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DiagsBuffer->FlushDiagnostics(*FinalDiags);
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return FinalDiags;
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}
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int ShowEnabledWarnings::run(unsigned int argc, char **argv, raw_ostream &Out) {
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// First check our one flag (--levels).
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bool ShouldShowLevels = true;
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if (argc > 0) {
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StringRef FirstArg(*argv);
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if (FirstArg.equals("--no-levels")) {
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ShouldShowLevels = false;
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--argc;
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++argv;
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} else if (FirstArg.equals("--levels")) {
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ShouldShowLevels = true;
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--argc;
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++argv;
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}
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}
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// Create the diagnostic engine.
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IntrusiveRefCntPtr<DiagnosticsEngine> Diags = createDiagnostics(argc, argv);
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if (!Diags) {
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printUsage();
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return EXIT_FAILURE;
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}
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// Now we have our diagnostics. Iterate through EVERY diagnostic and see
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// which ones are turned on.
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// FIXME: It would be very nice to print which flags are turning on which
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// diagnostics, but this can be done with a diff.
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ArrayRef<DiagnosticRecord> AllDiagnostics = getBuiltinDiagnosticsByName();
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std::vector<PrettyDiag> Active;
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for (ArrayRef<DiagnosticRecord>::iterator I = AllDiagnostics.begin(),
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E = AllDiagnostics.end();
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I != E; ++I) {
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unsigned DiagID = I->DiagID;
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if (DiagnosticIDs::isBuiltinNote(DiagID))
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continue;
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if (!DiagnosticIDs::isBuiltinWarningOrExtension(DiagID))
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continue;
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DiagnosticsEngine::Level DiagLevel =
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Diags->getDiagnosticLevel(DiagID, SourceLocation());
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if (DiagLevel == DiagnosticsEngine::Ignored)
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continue;
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StringRef WarningOpt = DiagnosticIDs::getWarningOptionForDiag(DiagID);
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Active.push_back(PrettyDiag(I->getName(), WarningOpt, DiagLevel));
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}
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// Print them all out.
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for (std::vector<PrettyDiag>::const_iterator I = Active.begin(),
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E = Active.end(); I != E; ++I) {
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if (ShouldShowLevels)
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Out << getCharForLevel(I->Level) << " ";
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Out << I->Name;
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if (!I->Flag.empty())
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Out << " [-W" << I->Flag << "]";
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Out << '\n';
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}
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return EXIT_SUCCESS;
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}
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