path: root/lib/Basic/Diagnostic.cpp

//===--- Diagnostic.cpp - C Language Family Diagnostic Handling -----------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
//  This file implements the Diagnostic-related interfaces.
//
//===----------------------------------------------------------------------===//

#include "clang/Basic/CharInfo.h"
#include "clang/Basic/Diagnostic.h"
#include "clang/Basic/DiagnosticOptions.h"
#include "clang/Basic/IdentifierTable.h"
#include "clang/Basic/PartialDiagnostic.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/Support/CrashRecoveryContext.h"
#include "llvm/Support/raw_ostream.h"

using namespace clang;

static void DummyArgToStringFn(DiagnosticsEngine::ArgumentKind AK, intptr_t QT,
                               const char *Modifier, unsigned ML,
                               const char *Argument, unsigned ArgLen,
                               const DiagnosticsEngine::ArgumentValue *PrevArgs,
                               unsigned NumPrevArgs,
                               SmallVectorImpl<char> &Output,
                               void *Cookie,
                               ArrayRef<intptr_t> QualTypeVals) {
  const char *Str = "<can't format argument>";
  Output.append(Str, Str+strlen(Str));
}


DiagnosticsEngine::DiagnosticsEngine(
                       const IntrusiveRefCntPtr<DiagnosticIDs> &diags,
                       DiagnosticOptions *DiagOpts,       
                       DiagnosticConsumer *client, bool ShouldOwnClient)
  : Diags(diags), DiagOpts(DiagOpts), Client(client),
    OwnsDiagClient(ShouldOwnClient), SourceMgr(0) {
  ArgToStringFn = DummyArgToStringFn;
  ArgToStringCookie = 0;

  AllExtensionsSilenced = 0;
  IgnoreAllWarnings = false;
  WarningsAsErrors = false;
  EnableAllWarnings = false;
  ErrorsAsFatal = false;
  SuppressSystemWarnings = false;
  SuppressAllDiagnostics = false;
  ElideType = true;
  PrintTemplateTree = false;
  ShowColors = false;
  ShowOverloads = Ovl_All;
  ExtBehavior = Ext_Ignore;

  ErrorLimit = 0;
  TemplateBacktraceLimit = 0;
  ConstexprBacktraceLimit = 0;

  Reset();
}

DiagnosticsEngine::~DiagnosticsEngine() {
  if (OwnsDiagClient)
    delete Client;
}

void DiagnosticsEngine::setClient(DiagnosticConsumer *client,
                                  bool ShouldOwnClient) {
  if (OwnsDiagClient && Client)
    delete Client;
  
  Client = client;
  OwnsDiagClient = ShouldOwnClient;
}

void DiagnosticsEngine::pushMappings(SourceLocation Loc) {
  DiagStateOnPushStack.push_back(GetCurDiagState());
}

bool DiagnosticsEngine::popMappings(SourceLocation Loc) {
  if (DiagStateOnPushStack.empty())
    return false;

  if (DiagStateOnPushStack.back() != GetCurDiagState()) {
    // State changed at some point between push/pop.
    PushDiagStatePoint(DiagStateOnPushStack.back(), Loc);
  }
  DiagStateOnPushStack.pop_back();
  return true;
}

void DiagnosticsEngine::Reset() {
  ErrorOccurred = false;
  UncompilableErrorOccurred = false;
  FatalErrorOccurred = false;
  UnrecoverableErrorOccurred = false;
  
  NumWarnings = 0;
  NumErrors = 0;
  NumErrorsSuppressed = 0;
  TrapNumErrorsOccurred = 0;
  TrapNumUnrecoverableErrorsOccurred = 0;
  
  CurDiagID = ~0U;
  LastDiagLevel = DiagnosticIDs::Ignored;
  DelayedDiagID = 0;

  // Clear state related to #pragma diagnostic.
  DiagStates.clear();
  DiagStatePoints.clear();
  DiagStateOnPushStack.clear();

  // Create a DiagState and DiagStatePoint representing diagnostic changes
  // through command-line.
  DiagStates.push_back(DiagState());
  DiagStatePoints.push_back(DiagStatePoint(&DiagStates.back(), FullSourceLoc()));
}

void DiagnosticsEngine::SetDelayedDiagnostic(unsigned DiagID, StringRef Arg1,
                                             StringRef Arg2) {
  if (DelayedDiagID)
    return;

  DelayedDiagID = DiagID;
  DelayedDiagArg1 = Arg1.str();
  DelayedDiagArg2 = Arg2.str();
}

void DiagnosticsEngine::ReportDelayed() {
  Report(DelayedDiagID) << DelayedDiagArg1 << DelayedDiagArg2;
  DelayedDiagID = 0;
  DelayedDiagArg1.clear();
  DelayedDiagArg2.clear();
}

DiagnosticsEngine::DiagStatePointsTy::iterator
DiagnosticsEngine::GetDiagStatePointForLoc(SourceLocation L) const {
  assert(!DiagStatePoints.empty());
  assert(DiagStatePoints.front().Loc.isInvalid() &&
         "Should have created a DiagStatePoint for command-line");

  if (!SourceMgr)
    return DiagStatePoints.end() - 1;

  FullSourceLoc Loc(L, *SourceMgr);
  if (Loc.