clang/unittests/Frontend/CompilerInstanceTest.cpp

   1 //===- unittests/Frontend/CompilerInstanceTest.cpp - CI tests -------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "clang/Frontend/CompilerInstance.h"
  10 #include "clang/Basic/FileManager.h"
  11 #include "clang/Frontend/CompilerInvocation.h"
  12 #include "clang/Frontend/TextDiagnosticPrinter.h"
  13 #include "llvm/Support/FileSystem.h"
  14 #include "llvm/Support/Format.h"
  15 #include "llvm/Support/ToolOutputFile.h"
  16 #include "gtest/gtest.h"
  17
  18 using namespace llvm;
  19 using namespace clang;
  20
  21 namespace {
  22
  23 TEST(CompilerInstance, DefaultVFSOverlayFromInvocation) {
  24   // Create a temporary VFS overlay yaml file.
  25   int FD;
  26   SmallString<256> FileName;
  27   ASSERT_FALSE(sys::fs::createTemporaryFile("vfs", "yaml", FD, FileName));
  28   ToolOutputFile File(FileName, FD);
  29
  30   SmallString<256> CurrentPath;
  31   sys::fs::current_path(CurrentPath);
  32   sys::fs::make_absolute(CurrentPath, FileName);
  33
  34   // Mount the VFS file itself on the path 'virtual.file'. Makes this test
  35   // a bit shorter than creating a new dummy file just for this purpose.
  36   const std::string CurrentPathStr = std::string(CurrentPath.str());
  37   const std::string FileNameStr = std::string(FileName.str());
  38   const char *VFSYaml = "{ 'version': 0, 'roots': [\n"
  39                         "  { 'name': '%s',\n"
  40                         "    'type': 'directory',\n"
  41                         "    'contents': [\n"
  42                         "      { 'name': 'vfs-virtual.file', 'type': 'file',\n"
  43                         "        'external-contents': '%s'\n"
  44                         "      }\n"
  45                         "    ]\n"
  46                         "  }\n"
  47                         "]}\n";
  48   File.os() << format(VFSYaml, CurrentPathStr.c_str(), FileName.c_str());
  49   File.os().flush();
  50
  51   // Create a CompilerInvocation that uses this overlay file.
  52   const std::string VFSArg = "-ivfsoverlay" + FileNameStr;
  53   const char *Args[] = {"clang", VFSArg.c_str(), "-xc++", "-"};
  54
  55   IntrusiveRefCntPtr<DiagnosticsEngine> Diags =
  56       CompilerInstance::createDiagnostics(new DiagnosticOptions());
  57
  58   std::shared_ptr<CompilerInvocation> CInvok =
  59       createInvocationFromCommandLine(Args, Diags);
  60
  61   if (!CInvok)
  62     FAIL() << "could not create compiler invocation";
  63   // Create a minimal CompilerInstance which should use the VFS we specified
  64   // in the CompilerInvocation (as we don't explicitly set our own).
  65   CompilerInstance Instance;
  66   Instance.setDiagnostics(Diags.get());
  67   Instance.setInvocation(CInvok);
  68   Instance.createFileManager();
  69
  70   // Check if the virtual file exists which means that our VFS is used by the
  71   // CompilerInstance.
  72   ASSERT_TRUE(Instance.getFileManager().getFile("vfs-virtual.file"));
  73 }
  74
  75 TEST(CompilerInstance, AllowDiagnosticLogWithUnownedDiagnosticConsumer) {
  76   auto DiagOpts = new DiagnosticOptions();
  77   // Tell the diagnostics engine to emit the diagnostic log to STDERR. This
  78   // ensures that a chained diagnostic consumer is created so that the test can
  79   // exercise the unowned diagnostic consumer in a chained consumer.
  80   DiagOpts->DiagnosticLogFile = "-";
  81
  82   // Create the diagnostic engine with unowned consumer.
  83   std::string DiagnosticOutput;
  84   llvm::raw_string_ostream DiagnosticsOS(DiagnosticOutput);
  85   auto DiagPrinter = std::make_unique<TextDiagnosticPrinter>(
  86       DiagnosticsOS, new DiagnosticOptions());
  87   CompilerInstance Instance;
  88   IntrusiveRefCntPtr<DiagnosticsEngine> Diags = Instance.createDiagnostics(
  89       DiagOpts, DiagPrinter.get(), /*ShouldOwnClient=*/false);
  90
  91   Diags->Report(diag::err_expected) << "no crash";
  92   ASSERT_EQ(DiagnosticsOS.str(), "error: expected no crash\n");
  93 }
  94
  95 } // anonymous namespace