Coverage Report

Created: 2020-09-15 12:33

/Users/buildslave/jenkins/workspace/coverage/llvm-project/clang/tools/driver/driver.cpp
Line
Count
Source (jump to first uncovered line)
1
//===-- driver.cpp - Clang GCC-Compatible Driver --------------------------===//
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
// This is the entry point to the clang driver; it is a thin wrapper
10
// for functionality in the Driver clang library.
11
//
12
//===----------------------------------------------------------------------===//
13
14
#include "clang/Driver/Driver.h"
15
#include "clang/Basic/DiagnosticOptions.h"
16
#include "clang/Basic/Stack.h"
17
#include "clang/Config/config.h"
18
#include "clang/Driver/Compilation.h"
19
#include "clang/Driver/DriverDiagnostic.h"
20
#include "clang/Driver/Options.h"
21
#include "clang/Driver/ToolChain.h"
22
#include "clang/Frontend/ChainedDiagnosticConsumer.h"
23
#include "clang/Frontend/CompilerInvocation.h"
24
#include "clang/Frontend/SerializedDiagnosticPrinter.h"
25
#include "clang/Frontend/TextDiagnosticPrinter.h"
26
#include "clang/Frontend/Utils.h"
27
#include "llvm/ADT/ArrayRef.h"
28
#include "llvm/ADT/SmallString.h"
29
#include "llvm/ADT/SmallVector.h"
30
#include "llvm/Option/ArgList.h"
31
#include "llvm/Option/OptTable.h"
32
#include "llvm/Option/Option.h"
33
#include "llvm/Support/BuryPointer.h"
34
#include "llvm/Support/CommandLine.h"
35
#include "llvm/Support/CrashRecoveryContext.h"
36
#include "llvm/Support/ErrorHandling.h"
37
#include "llvm/Support/FileSystem.h"
38
#include "llvm/Support/Host.h"
39
#include "llvm/Support/InitLLVM.h"
40
#include "llvm/Support/Path.h"
41
#include "llvm/Support/PrettyStackTrace.h"
42
#include "llvm/Support/Process.h"
43
#include "llvm/Support/Program.h"
44
#include "llvm/Support/Regex.h"
45
#include "llvm/Support/Signals.h"
46
#include "llvm/Support/StringSaver.h"
47
#include "llvm/Support/TargetSelect.h"
48
#include "llvm/Support/Timer.h"
49
#include "llvm/Support/raw_ostream.h"
50
#include <memory>
51
#include <set>
52
#include <system_error>
53
using namespace clang;
54
using namespace clang::driver;
55
using namespace llvm::opt;
56
57
19.9k
std::string GetExecutablePath(const char *Argv0, bool CanonicalPrefixes) {
58
19.9k
  if (!CanonicalPrefixes) {
59
1.04k
    SmallString<128> ExecutablePath(Argv0);
60
    // Do a PATH lookup if Argv0 isn't a valid path.
61
1.04k
    if (!llvm::sys::fs::exists(ExecutablePath))
62
0
      if (llvm::ErrorOr<std::string> P =
63
0
              llvm::sys::findProgramByName(ExecutablePath))
64
0
        ExecutablePath = *P;
65
1.04k
    return std::string(ExecutablePath.str());
66
1.04k
  }
67
18.9k
68
  // This just needs to be some symbol in the binary; C++ doesn't
69
  // allow taking the address of ::main however.
70
18.9k
  void *P = (void*) (intptr_t) GetExecutablePath;
71
18.9k
  return llvm::sys::fs::getMainExecutable(Argv0, P);
72
18.9k
}
73
74
static const char *GetStableCStr(std::set<std::string> &SavedStrings,
75
81
                                 StringRef S) {
76
81
  return SavedStrings.insert(std::string(S)).first->c_str();
77
81
}
78
79
/// ApplyQAOverride - Apply a list of edits to the input argument lists.
80
///
81
/// The input string is a space separate list of edits to perform,
82
/// they are applied in order to the input argument lists. Edits
83
/// should be one of the following forms:
84
///
85
///  '#': Silence information about the changes to the command line arguments.
86
///
87
///  '^': Add FOO as a new argument at the beginning of the command line.
88
///
89
///  '+': Add FOO as a new argument at the end of the command line.
90
///
91
///  's/XXX/YYY/': Substitute the regular expression XXX with YYY in the command
92
///  line.
93
///
94
///  'xOPTION': Removes all instances of the literal argument OPTION.
95
///
96
///  'XOPTION': Removes all instances of the literal argument OPTION,
97
///  and the following argument.
98
///
99
///  'Ox': Removes all flags matching 'O' or 'O[sz0-9]' and adds 'Ox'
100
///  at the end of the command line.
101
///
102
/// \param OS - The stream to write edit information to.
103
/// \param Args - The vector of command line arguments.
104
/// \param Edit - The override command to perform.
105
/// \param SavedStrings - Set to use for storing string representations.
106
static void ApplyOneQAOverride(raw_ostream &OS,
107
                               SmallVectorImpl<const char*> &Args,
108
                               StringRef Edit,
109
16
                               std::set<std::string> &SavedStrings) {
110
  // This does not need to be efficient.
111
16
112
16
  if (Edit[0] == '^') {
113
1
    const char *Str =
114
1
      GetStableCStr(SavedStrings, Edit.substr(1));
115
1
    OS << "### Adding argument " << Str << " at beginning\n";
116
1
    Args.insert(Args.begin() + 1, Str);
117
15
  } else if (Edit[0] == '+') {
118
11
    const char *Str =
119
11
      GetStableCStr(SavedStrings, Edit.substr(1));
120
11
    OS << "### Adding argument " << Str << " at end\n";
121
11
    Args.push_back(Str);
122
4
  } else if (Edit[0] == 's' && 
Edit[1] == '/'0
&&
Edit.endswith("/")0
&&
123
0
             Edit.slice(2, Edit.size()-1).find('/') != StringRef::npos) {
124
0
    StringRef MatchPattern = Edit.substr(2).split('/').first;
125
0
    StringRef ReplPattern = Edit.substr(2).split('/').second;
126
0
    ReplPattern = ReplPattern.slice(0, ReplPattern.size()-1);
127
0
128
0
    for (unsigned i = 1, e = Args.size(); i != e; ++i) {
129
      // Ignore end-of-line response file markers
130
0
      if (Args[i] == nullptr)
131
0
        continue;
132
0
      std::string Repl = llvm::Regex(MatchPattern).sub(ReplPattern, Args[i]);
133
0
134
0
      if (Repl != Args[i]) {
135
0
        OS << "### Replacing '" << Args[i] << "' with '" << Repl << "'\n";
136
0
        Args[i] = GetStableCStr(SavedStrings, Repl);
137
0
      }
138
0
    }
139
4
  } else if (Edit[0] == 'x' || 
Edit[0] == 'X'2
) {
140
3
    auto Option = Edit.substr(1);
141
34
    for (unsigned i = 1; i < Args.size();) {
142
31
      if (Option == Args[i]) {
143
4
        OS << "### Deleting argument " << Args[i] << '\n';
144
4
        Args.erase(Args.begin() + i);
145
4
        if (Edit[0] == 'X') {
146
1
          if (i < Args.size()) {
147
1
            OS << "### Deleting argument " << Args[i] << '\n';
148
1
            Args.erase(Args.begin() + i);
149
1
          } else
150
0
            OS << "### Invalid X edit, end of command line!\n";
151
1
        }
152
4
      } else
153
27
        ++i;
154
31
    }
155
1
  } else if (Edit[0] == 'O') {
156
11
    for (unsigned i = 1; i < Args.size();) {
157
10
      const char *A = Args[i];
158
      // Ignore end-of-line response file markers
159
10
      if (A == nullptr)
160
0
        continue;
161
10
      if (A[0] == '-' && 
A[1] == 'O'8
&&
162
7
          (A[2] == '\0' ||
163
6
           (A[3] == '\0' && 
(5
A[2] == 's'5
||
A[2] == 'z'4
||
164
6
                             
(3
'0' <= A[2]3
&&
A[2] <= '9'3
))))) {
165
6
        OS << "### Deleting argument " << Args[i] << '\n';
166
6
        Args.erase(Args.begin() + i);
167
6
      } else
168
4
        ++i;
169
10
    }
170
1
    OS << "### Adding argument " << Edit << " at end\n";
171
1
    Args.push_back(GetStableCStr(SavedStrings, '-' + Edit.str()));
172
0
  } else {
173
0
    OS << "### Unrecognized edit: " << Edit << "\n";
174
0
  }
175
16
}
176
177
/// ApplyQAOverride - Apply a comma separate list of edits to the
178
/// input argument lists. See ApplyOneQAOverride.
179
static void ApplyQAOverride(SmallVectorImpl<const char*> &Args,
180
                            const char *OverrideStr,
181
4
                            std::set<std::string> &SavedStrings) {
182
4
  raw_ostream *OS = &llvm::errs();
183
4
184
4
  if (OverrideStr[0] == '#') {
185
1
    ++OverrideStr;
186
1
    OS = &llvm::nulls();
187
1
  }
188
4
189
4
  *OS << "### CCC_OVERRIDE_OPTIONS: " << OverrideStr << "\n";
190
4
191
  // This does not need to be efficient.
192
4
193
4
  const char *S = OverrideStr;
194
21
  while (*S) {
195
17
    const char *End = ::strchr(S, ' ');
196
17
    if (!End)
197
3
      End = S + strlen(S);
198
17
    if (End != S)
199
16
      ApplyOneQAOverride(*OS, Args, std::string(S, End), SavedStrings);
200
17
    S = End;
201
17
    if (*S != '\0')
202
14
      ++S;
203
17
  }
204
4
}
205
206
extern int cc1_main(ArrayRef<const char *> Argv, const char *Argv0,
207
                    void *MainAddr);
208
extern int cc1as_main(ArrayRef<const char *> Argv, const char *Argv0,
209
                      void *MainAddr);
210
extern int cc1gen_reproducer_main(ArrayRef<const char *> Argv,
211
                                  const char *Argv0, void *MainAddr);
212
213
static void insertTargetAndModeArgs(const ParsedClangName &NameParts,
214
                                    SmallVectorImpl<const char *> &ArgVector,
215
19.9k
                                    std::set<std::string> &SavedStrings) {
216
  // Put target and mode arguments at the start of argument list so that
217
  // arguments specified in command line could override them. Avoid putting
218
  // them at index 0, as an option like '-cc1' must remain the first.
219
19.9k
  int InsertionPoint = 0;
220
19.9k
  if (ArgVector.size() > 0)
221
19.9k
    ++InsertionPoint;
222
19.9k
223
19.9k
  if (NameParts.DriverMode) {
224
    // Add the mode flag to the arguments.
225
58
    ArgVector.insert(ArgVector.begin() + InsertionPoint,
226
58
                     GetStableCStr(SavedStrings, NameParts.DriverMode));
227
58
  }
228
19.9k
229
19.9k
  if (NameParts.TargetIsValid) {
230
10
    const char *arr[] = {"-target", GetStableCStr(SavedStrings,
231
10
                                                  NameParts.TargetPrefix)};
232
10
    ArgVector.insert(ArgVector.begin() + InsertionPoint,
233
10
                     std::begin(arr), std::end(arr));
234
10
  }
235
19.9k
}
236
237
static void getCLEnvVarOptions(std::string &EnvValue, llvm::StringSaver &Saver,
238
3
                               SmallVectorImpl<const char *> &Opts) {
239
3
  llvm::cl::TokenizeWindowsCommandLine(EnvValue, Saver, Opts);
240
  // The first instance of '#' should be replaced with '=' in each option.
241
3
  for (const char *Opt : Opts)
242
5
    if (char *NumberSignPtr = const_cast<char *>(::strchr(Opt, '#')))
243
0
      *NumberSignPtr = '=';
244
3
}
245
246
19.9k
static void SetBackdoorDriverOutputsFromEnvVars(Driver &TheDriver) {
247
  // Handle CC_PRINT_OPTIONS and CC_PRINT_OPTIONS_FILE.
248
19.9k
  TheDriver.CCPrintOptions = !!::getenv("CC_PRINT_OPTIONS");
249
19.9k
  if (TheDriver.CCPrintOptions)
250
1
    TheDriver.CCPrintOptionsFilename = ::getenv("CC_PRINT_OPTIONS_FILE");
251
19.9k
252
  // Handle CC_PRINT_HEADERS and CC_PRINT_HEADERS_FILE.
253
19.9k
  TheDriver.CCPrintHeaders = !!::getenv("CC_PRINT_HEADERS");
254
19.9k
  if (TheDriver.CCPrintHeaders)
255
6
    TheDriver.CCPrintHeadersFilename = ::getenv("CC_PRINT_HEADERS_FILE");
256
19.9k
257
  // Handle CC_LOG_DIAGNOSTICS and CC_LOG_DIAGNOSTICS_FILE.
258
19.9k
  TheDriver.CCLogDiagnostics = !!::getenv("CC_LOG_DIAGNOSTICS");
259
19.9k
  if (TheDriver.CCLogDiagnostics)
260
7
    TheDriver.CCLogDiagnosticsFilename = ::getenv("CC_LOG_DIAGNOSTICS_FILE");
261
19.9k
}
262
263
static void FixupDiagPrefixExeName(TextDiagnosticPrinter *DiagClient,
264
19.9k
                                   const std::string &Path) {
265
  // If the clang binary happens to be named cl.exe for compatibility reasons,
266
  // use clang-cl.exe as the prefix to avoid confusion between clang and MSVC.
267
19.9k
  StringRef ExeBasename(llvm::sys::path::stem(Path));
268
19.9k
  if (ExeBasename.equals_lower("cl"))
269
0
    ExeBasename = "clang-cl";
270
19.9k
  DiagClient->setPrefix(std::string(ExeBasename));
271
19.9k
}
272
273
// This lets us create the DiagnosticsEngine with a properly-filled-out
274
// DiagnosticOptions instance.
275
static DiagnosticOptions *
276
19.9k
CreateAndPopulateDiagOpts(ArrayRef<const char *> argv, bool &UseNewCC1Process) {
277
19.9k
  auto *DiagOpts = new DiagnosticOptions;
278
19.9k
  unsigned MissingArgIndex, MissingArgCount;
279
19.9k
  InputArgList Args = getDriverOptTable().ParseArgs(
280
19.9k
      argv.slice(1), MissingArgIndex, MissingArgCount);
281
  // We ignore MissingArgCount and the return value of ParseDiagnosticArgs.
282
  // Any errors that would be diagnosed here will also be diagnosed later,
283
  // when the DiagnosticsEngine actually exists.
284
19.9k
  (void)ParseDiagnosticArgs(*DiagOpts, Args);
285
19.9k
286
19.9k
  UseNewCC1Process =
287
19.9k
      Args.hasFlag(clang::driver::options::OPT_fno_integrated_cc1,
288
19.9k
                   clang::driver::options::OPT_fintegrated_cc1,
289
                   /*Default=*/
CLANG_SPAWN_CC119.9k
);
290
19.9k
291
19.9k
  return DiagOpts;
292
19.9k
}
293
294
static void SetInstallDir(SmallVectorImpl<const char *> &argv,
295
19.9k
                          Driver &TheDriver, bool CanonicalPrefixes) {
296
  // Attempt to find the original path used to invoke the driver, to determine
297
  // the installed path. We do this manually, because we want to support that
298
  // path being a symlink.
299
19.9k
  SmallString<128> InstalledPath(argv[0]);
300
19.9k
301
  // Do a PATH lookup, if there are no directory components.
302
19.9k
  if (llvm::sys::path::filename(InstalledPath) == InstalledPath)
303
3
    if (llvm::ErrorOr<std::string> Tmp = llvm::sys::findProgramByName(
304
3
            llvm::sys::path::filename(InstalledPath.str())))
305
3
      InstalledPath = *Tmp;
306
19.9k
307
  // FIXME: We don't actually canonicalize this, we just make it absolute.
308
19.9k
  if (CanonicalPrefixes)
309
18.9k
    llvm::sys::fs::make_absolute(InstalledPath);
310
19.9k
311
19.9k
  StringRef InstalledPathParent(llvm::sys::path::parent_path(InstalledPath));
312
19.9k
  if (llvm::sys::fs::exists(InstalledPathParent))
313
19.9k
    TheDriver.setInstalledDir(InstalledPathParent);
314
19.9k
}
315
316
39.0k
static int ExecuteCC1Tool(SmallVectorImpl<const char *> &ArgV) {
317
  // If we call the cc1 tool from the clangDriver library (through
318
  // Driver::CC1Main), we need to clean up the options usage count. The options
319
  // are currently global, and they might have been used previously by the
320
  // driver.
321
39.0k
  llvm::cl::ResetAllOptionOccurrences();
322
39.0k
323
39.0k
  llvm::BumpPtrAllocator A;
324
39.0k
  llvm::StringSaver Saver(A);
325
39.0k
  llvm::cl::ExpandResponseFiles(Saver, &llvm::cl::TokenizeGNUCommandLine, ArgV,
326
39.0k
                                /*MarkEOLs=*/false);
327
39.0k
  StringRef Tool = ArgV[1];
328
39.0k
  void *GetExecutablePathVP = (void *)(intptr_t)GetExecutablePath;
329
39.0k
  if (Tool == "-cc1")
330
38.9k
    return cc1_main(makeArrayRef(ArgV).slice(1), ArgV[0], GetExecutablePathVP);
331
48
  if (Tool == "-cc1as")
332
44
    return cc1as_main(makeArrayRef(ArgV).slice(2), ArgV[0],
333
44
                      GetExecutablePathVP);
334
4
  if (Tool == "-cc1gen-reproducer")
335
3
    return cc1gen_reproducer_main(makeArrayRef(ArgV).slice(2), ArgV[0],
336
3
                                  GetExecutablePathVP);
337
  // Reject unknown tools.
338
1
  llvm::errs() << "error: unknown integrated tool '" << Tool << "'. "
339
1
               << "Valid tools include '-cc1' and '-cc1as'.\n";
340
1
  return 1;
341
1
}
342
343
51.1k
int main(int argc_, const char **argv_) {
344
51.1k
  noteBottomOfStack();
345
51.1k
  llvm::InitLLVM X(argc_, argv_);
346
51.1k
  llvm::setBugReportMsg("PLEASE submit a bug report to " BUG_REPORT_URL
347
51.1k
                        " and include the crash backtrace, preprocessed "
348
51.1k
                        "source, and associated run script.\n");
349
51.1k
  SmallVector<const char *, 256> argv(argv_, argv_ + argc_);
350
51.1k
351
51.1k
  if (llvm::sys::Process::FixupStandardFileDescriptors())
352
0
    return 1;
353
51.1k
354
51.1k
  llvm::InitializeAllTargets();
355
51.1k
  auto TargetAndMode = ToolChain::getTargetAndModeFromProgramName(argv[0]);
356
51.1k
357
51.1k
  llvm::BumpPtrAllocator A;
358
51.1k
  llvm::StringSaver Saver(A);
359
51.1k
360
  // Parse response files using the GNU syntax, unless we're in CL mode. There
361
  // are two ways to put clang in CL compatibility mode: argv[0] is either
362
  // clang-cl or cl, or --driver-mode=cl is on the command line. The normal
363
  // command line parsing can't happen until after response file parsing, so we
364
  // have to manually search for a --driver-mode=cl argument the hard way.
365
  // Finally, our -cc1 tools don't care which tokenization mode we use because
366
  // response files written by clang will tokenize the same way in either mode.
367
51.1k
  bool ClangCLMode = false;
368
51.1k
  if (StringRef(TargetAndMode.DriverMode).equals("--driver-mode=cl") ||
369
718k
      
llvm::find_if(argv, [](const char *F) 51.1k
{
370
718k
        return F && strcmp(F, "--driver-mode=cl") == 0;
371
516
      }) != argv.end()) {
372
516
    ClangCLMode = true;
373
516
  }
374
51.1k
  enum { Default, POSIX, Windows } RSPQuoting = Default;
375
721k
  for (const char *F : argv) {
376
721k
    if (strcmp(F, "--rsp-quoting=posix") == 0)
377
0
      RSPQuoting = POSIX;
378
721k
    else if (strcmp(F, "--rsp-quoting=windows") == 0)
379
2
      RSPQuoting = Windows;
380
721k
  }
381
51.1k
382
  // Determines whether we want nullptr markers in argv to indicate response
383
  // files end-of-lines. We only use this for the /LINK driver argument with
384
  // clang-cl.exe on Windows.
385
51.1k
  bool MarkEOLs = ClangCLMode;
386
51.1k
387
51.1k
  llvm::cl::TokenizerCallback Tokenizer;
388
51.1k
  if (RSPQuoting == Windows || 
(51.1k
RSPQuoting == Default51.1k
&&
ClangCLMode51.1k
))
389
518
    Tokenizer = &llvm::cl::TokenizeWindowsCommandLine;
390
50.6k
  else
391
50.6k
    Tokenizer = &llvm::cl::TokenizeGNUCommandLine;
392
51.1k
393
51.1k
  if (MarkEOLs && 
argv.size() > 1516
&&
StringRef(argv[1]).startswith("-cc1")516
)
394
0
    MarkEOLs = false;
395
51.1k
  llvm::cl::ExpandResponseFiles(Saver, Tokenizer, argv, MarkEOLs);
396
51.1k
397
  // Handle -cc1 integrated tools, even if -cc1 was expanded from a response
398
  // file.
399
51.1k
  auto FirstArg = std::find_if(argv.begin() + 1, argv.end(),
400
51.1k
                               [](const char *A) { return A != nullptr; });
401
51.1k
  if (FirstArg != argv.end() && StringRef(*FirstArg).startswith("-cc1")) {
402
    // If -cc1 came from a response file, remove the EOL sentinels.
403
31.1k
    if (MarkEOLs) {
404
0
      auto newEnd = std::remove(argv.begin(), argv.end(), nullptr);
405
0
      argv.resize(newEnd - argv.begin());
406
0
    }
407
31.1k
    return ExecuteCC1Tool(argv);
408
31.1k
  }
409
19.9k
410
  // Handle options that need handling before the real command line parsing in
411
  // Driver::BuildCompilation()
412
19.9k
  bool CanonicalPrefixes = true;
413
571k
  for (int i = 1, size = argv.size(); i < size; 
++i551k
) {
414
    // Skip end-of-line response file markers
415
552k
    if (argv[i] == nullptr)
416
2
      continue;
417
552k
    if (StringRef(argv[i]) == "-no-canonical-prefixes") {
418
1.04k
      CanonicalPrefixes = false;
419
1.04k
      break;
420
1.04k
    }
421
552k
  }
422
19.9k
423
  // Handle CL and _CL_ which permits additional command line options to be
424
  // prepended or appended.
425
19.9k
  if (ClangCLMode) {
426
    // Arguments in "CL" are prepended.
427
516
    llvm::Optional<std::string> OptCL = llvm::sys::Process::GetEnv("CL");
428
516
    if (OptCL.hasValue()) {
429
2
      SmallVector<const char *, 8> PrependedOpts;
430
2
      getCLEnvVarOptions(OptCL.getValue(), Saver, PrependedOpts);
431
2
432
      // Insert right after the program name to prepend to the argument list.
433
2
      argv.insert(argv.begin() + 1, PrependedOpts.begin(), PrependedOpts.end());
434
2
    }
435
    // Arguments in "_CL_" are appended.
436
516
    llvm::Optional<std::string> Opt_CL_ = llvm::sys::Process::GetEnv("_CL_");
437
516
    if (Opt_CL_.hasValue()) {
438
1
      SmallVector<const char *, 8> AppendedOpts;
439
1
      getCLEnvVarOptions(Opt_CL_.getValue(), Saver, AppendedOpts);
440
1
441
      // Insert at the end of the argument list to append.
442
1
      argv.append(AppendedOpts.begin(), AppendedOpts.end());
443
1
    }
444
516
  }
445
19.9k
446
19.9k
  std::set<std::string> SavedStrings;
447
  // Handle CCC_OVERRIDE_OPTIONS, used for editing a command line behind the
448
  // scenes.
449
19.9k
  if (const char *OverrideStr = ::getenv("CCC_OVERRIDE_OPTIONS")) {
450
    // FIXME: Driver shouldn't take extra initial argument.
451
4
    ApplyQAOverride(argv, OverrideStr, SavedStrings);
452
4
  }
453
19.9k
454
19.9k
  std::string Path = GetExecutablePath(argv[0], CanonicalPrefixes);
455
19.9k
456
  // Whether the cc1 tool should be called inside the current process, or if we
457
  // should spawn a new clang subprocess (old behavior).
458
  // Not having an additional process saves some execution time of Windows,
459
  // and makes debugging and profiling easier.
460
19.9k
  bool UseNewCC1Process;
461
19.9k
462
19.9k
  IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts =
463
19.9k
      CreateAndPopulateDiagOpts(argv, UseNewCC1Process);
464
19.9k
465
19.9k
  TextDiagnosticPrinter *DiagClient
466
19.9k
    = new TextDiagnosticPrinter(llvm::errs(), &*DiagOpts);
467
19.9k
  FixupDiagPrefixExeName(DiagClient, Path);
468
19.9k
469
19.9k
  IntrusiveRefCntPtr<DiagnosticIDs> DiagID(new DiagnosticIDs());
470
19.9k
471
19.9k
  DiagnosticsEngine Diags(DiagID, &*DiagOpts, DiagClient);
472
19.9k
473
19.9k
  if (!DiagOpts->DiagnosticSerializationFile.empty()) {
474
11
    auto SerializedConsumer =
475
11
        clang::serialized_diags::create(DiagOpts->DiagnosticSerializationFile,
476
11
                                        &*DiagOpts, /*MergeChildRecords=*/true);
477
11
    Diags.setClient(new ChainedDiagnosticConsumer(
478
11
        Diags.takeClient(), std::move(SerializedConsumer)));
479
11
  }
480
19.9k
481
19.9k
  ProcessWarningOptions(Diags, *DiagOpts, /*ReportDiags=*/false);
482
19.9k
483
19.9k
  Driver TheDriver(Path, llvm::sys::getDefaultTargetTriple(), Diags);
484
19.9k
  SetInstallDir(argv, TheDriver, CanonicalPrefixes);
485
19.9k
  TheDriver.setTargetAndMode(TargetAndMode);
486
19.9k
487
19.9k
  insertTargetAndModeArgs(TargetAndMode, argv, SavedStrings);
488
19.9k
489
19.9k
  SetBackdoorDriverOutputsFromEnvVars(TheDriver);
490
19.9k
491
19.9k
  if (!UseNewCC1Process) {
492
19.9k
    TheDriver.CC1Main = &ExecuteCC1Tool;
493
    // Ensure the CC1Command actually catches cc1 crashes
494
19.9k
    llvm::CrashRecoveryContext::Enable();
495
19.9k
  }
496
19.9k
497
19.9k
  std::unique_ptr<Compilation> C(TheDriver.BuildCompilation(argv));
498
19.9k
  int Res = 1;
499
19.9k
  bool IsCrash = false;
500
19.9k
  if (C && !C->containsError()) {
501
19.9k
    SmallVector<std::pair<int, const Command *>, 4> FailingCommands;
502
19.9k
    Res = TheDriver.ExecuteCompilation(*C, FailingCommands);
503
19.9k
504
    // Force a crash to test the diagnostics.
505
19.9k
    if (TheDriver.GenReproducer) {
506
14
      Diags.Report(diag::err_drv_force_crash)
507
14
        << !::getenv("FORCE_CLANG_DIAGNOSTICS_CRASH");
508
14
509
      // Pretend that every command failed.
510
14
      FailingCommands.clear();
511
14
      for (const auto &J : C->getJobs())
512
14
        if (const Command *C = dyn_cast<Command>(&J))
513
14
          FailingCommands.push_back(std::make_pair(-1, C));
514
14
515
      // Print the bug report message that would be printed if we did actually
516
      // crash, but only if we're crashing due to FORCE_CLANG_DIAGNOSTICS_CRASH.
517
14
      if (::getenv("FORCE_CLANG_DIAGNOSTICS_CRASH"))
518
13
        llvm::dbgs() << llvm::getBugReportMsg();
519
14
    }
520
19.9k
521
259
    for (const auto &P : FailingCommands) {
522
259
      int CommandRes = P.first;
523
259
      const Command *FailingCommand = P.second;
524
259
      if (!Res)
525
249
        Res = CommandRes;
526
259
527
      // If result status is < 0, then the driver command signalled an error.
528
      // If result status is 70, then the driver command reported a fatal error.
529
      // On Windows, abort will return an exit code of 3.  In these cases,
530
      // generate additional diagnostic information if possible.
531
259
      IsCrash = CommandRes < 0 || 
CommandRes == 70236
;
532
#ifdef _WIN32
533
      IsCrash |= CommandRes == 3;
534
#endif
535
259
      if (IsCrash) {
536
24
        TheDriver.generateCompilationDiagnostics(*C, *FailingCommand);
537
24
        break;
538
24
      }
539
259
    }
540
19.9k
  }
541
19.9k
542
19.9k
  Diags.getClient()->finish();
543
19.9k
544
19.9k
  if (!UseNewCC1Process && 
IsCrash19.9k
) {
545
    // When crashing in -fintegrated-cc1 mode, bury the timer pointers, because
546
    // the internal linked list might point to already released stack frames.
547
24
    llvm::BuryPointer(llvm::TimerGroup::aquireDefaultGroup());
548
19.9k
  } else {
549
    // If any timers were active but haven't been destroyed yet, print their
550
    // results now.  This happens in -disable-free mode.
551
19.9k
    llvm::TimerGroup::printAll(llvm::errs());
552
19.9k
    llvm::TimerGroup::clearAll();
553
19.9k
  }
554
19.9k
555
#ifdef _WIN32
556
  // Exit status should not be negative on Win32, unless abnormal termination.
557
  // Once abnormal termination was caught, negative status should not be
558
  // propagated.
559
  if (Res < 0)
560
    Res = 1;
561
#endif
562
19.9k
563
  // If we have multiple failing commands, we return the result of the first
564
  // failing command.
565
19.9k
  return Res;
566
19.9k
}