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Daniel Dunbar544ecd12009-03-02 19:59:07 +00001//===-- driver.cpp - Clang GCC-Compatible Driver --------------------------===//
2//
3// The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
Daniel Dunbarb2da9332009-03-03 05:55:11 +000010// This is the entry point to the clang driver; it is a thin wrapper
11// for functionality in the Driver clang library.
Daniel Dunbar544ecd12009-03-02 19:59:07 +000012//
13//===----------------------------------------------------------------------===//
14
Jordan Rosea7d03842013-02-08 22:30:41 +000015#include "clang/Basic/CharInfo.h"
Douglas Gregor811db4e2012-10-23 22:26:28 +000016#include "clang/Basic/DiagnosticOptions.h"
Daniel Dunbar544ecd12009-03-02 19:59:07 +000017#include "clang/Driver/Compilation.h"
18#include "clang/Driver/Driver.h"
Richard Smith940a6d72012-12-25 21:56:27 +000019#include "clang/Driver/DriverDiagnostic.h"
Chandler Carruthcc0694c2012-12-04 09:25:21 +000020#include "clang/Driver/Options.h"
Chad Rosierd6f716a2012-03-13 20:09:56 +000021#include "clang/Frontend/CompilerInvocation.h"
Daniel Dunbar12ee3802010-02-25 03:23:43 +000022#include "clang/Frontend/TextDiagnosticPrinter.h"
Chad Rosierd6f716a2012-03-13 20:09:56 +000023#include "clang/Frontend/Utils.h"
Chris Lattnerce6c42f2011-03-23 04:04:01 +000024#include "llvm/ADT/ArrayRef.h"
Chandler Carruth5553d0d2014-01-07 11:51:46 +000025#include "llvm/ADT/STLExtras.h"
Daniel Dunbard9b80c22009-03-18 02:11:26 +000026#include "llvm/ADT/SmallString.h"
Rafael Espindola77a067a2010-07-19 15:20:12 +000027#include "llvm/ADT/SmallVector.h"
Reid Kleckner898229a2013-06-14 17:17:23 +000028#include "llvm/Option/ArgList.h"
29#include "llvm/Option/OptTable.h"
30#include "llvm/Option/Option.h"
Reid Kleckner61b23b72013-07-18 20:00:53 +000031#include "llvm/Support/CommandLine.h"
Rafael Espindola77a067a2010-07-19 15:20:12 +000032#include "llvm/Support/ErrorHandling.h"
Michael J. Spencer740857f2010-12-21 16:45:57 +000033#include "llvm/Support/FileSystem.h"
Chandler Carruthcc0694c2012-12-04 09:25:21 +000034#include "llvm/Support/Host.h"
Daniel Dunbar2608c542009-03-18 01:38:48 +000035#include "llvm/Support/ManagedStatic.h"
Rafael Espindola77a067a2010-07-19 15:20:12 +000036#include "llvm/Support/MemoryBuffer.h"
Michael J. Spencer8aaf4992010-11-29 18:12:39 +000037#include "llvm/Support/Path.h"
Chandler Carruthcc0694c2012-12-04 09:25:21 +000038#include "llvm/Support/PrettyStackTrace.h"
David Majnemer3f8f8c92013-10-07 07:33:27 +000039#include "llvm/Support/Process.h"
Michael J. Spencer8aaf4992010-11-29 18:12:39 +000040#include "llvm/Support/Program.h"
Chandler Carruthcc0694c2012-12-04 09:25:21 +000041#include "llvm/Support/Regex.h"
Michael J. Spencer8aaf4992010-11-29 18:12:39 +000042#include "llvm/Support/Signals.h"
Evan Cheng494eb062011-08-24 18:09:14 +000043#include "llvm/Support/TargetRegistry.h"
44#include "llvm/Support/TargetSelect.h"
Chandler Carruthcc0694c2012-12-04 09:25:21 +000045#include "llvm/Support/Timer.h"
46#include "llvm/Support/raw_ostream.h"
Michael J. Spencerf25faaa2010-12-09 17:36:38 +000047#include "llvm/Support/system_error.h"
Ahmed Charlesdfca6f92014-03-09 11:36:40 +000048#include <memory>
Daniel Dunbarc0b3e952009-03-12 08:55:43 +000049using namespace clang;
Daniel Dunbarb2cd66b2009-03-04 20:49:20 +000050using namespace clang::driver;
Reid Kleckner898229a2013-06-14 17:17:23 +000051using namespace llvm::opt;
Daniel Dunbar544ecd12009-03-02 19:59:07 +000052
Rafael Espindola9678d272013-06-26 05:03:40 +000053std::string GetExecutablePath(const char *Argv0, bool CanonicalPrefixes) {
Rafael Espindola73d46372009-12-04 19:31:58 +000054 if (!CanonicalPrefixes)
Rafael Espindola9678d272013-06-26 05:03:40 +000055 return Argv0;
Rafael Espindola73d46372009-12-04 19:31:58 +000056
Daniel Dunbarda382a82009-03-18 20:25:53 +000057 // This just needs to be some symbol in the binary; C++ doesn't
58 // allow taking the address of ::main however.
59 void *P = (void*) (intptr_t) GetExecutablePath;
Rafael Espindola9678d272013-06-26 05:03:40 +000060 return llvm::sys::fs::getMainExecutable(Argv0, P);
Daniel Dunbarda382a82009-03-18 20:25:53 +000061}
62
Daniel Dunbarc3ccd182009-07-17 18:10:27 +000063static const char *SaveStringInSet(std::set<std::string> &SavedStrings,
Chris Lattner0e62c1c2011-07-23 10:55:15 +000064 StringRef S) {
Daniel Dunbar3f4a2c22009-04-17 01:54:00 +000065 return SavedStrings.insert(S).first->c_str();
66}
67
68/// ApplyQAOverride - Apply a list of edits to the input argument lists.
69///
70/// The input string is a space separate list of edits to perform,
71/// they are applied in order to the input argument lists. Edits
72/// should be one of the following forms:
73///
Daniel Dunbar54091b82009-07-16 21:32:51 +000074/// '#': Silence information about the changes to the command line arguments.
75///
Daniel Dunbar3f4a2c22009-04-17 01:54:00 +000076/// '^': Add FOO as a new argument at the beginning of the command line.
77///
78/// '+': Add FOO as a new argument at the end of the command line.
79///
Daniel Dunbard2b20c12010-02-17 21:00:34 +000080/// 's/XXX/YYY/': Substitute the regular expression XXX with YYY in the command
81/// line.
Daniel Dunbar3f4a2c22009-04-17 01:54:00 +000082///
83/// 'xOPTION': Removes all instances of the literal argument OPTION.
84///
85/// 'XOPTION': Removes all instances of the literal argument OPTION,
86/// and the following argument.
87///
88/// 'Ox': Removes all flags matching 'O' or 'O[sz0-9]' and adds 'Ox'
89/// at the end of the command line.
Daniel Dunbar54091b82009-07-16 21:32:51 +000090///
91/// \param OS - The stream to write edit information to.
92/// \param Args - The vector of command line arguments.
93/// \param Edit - The override command to perform.
94/// \param SavedStrings - Set to use for storing string representations.
Chris Lattner0e62c1c2011-07-23 10:55:15 +000095static void ApplyOneQAOverride(raw_ostream &OS,
96 SmallVectorImpl<const char*> &Args,
97 StringRef Edit,
Chris Lattner09f8cc82010-03-30 05:39:52 +000098 std::set<std::string> &SavedStrings) {
Daniel Dunbar3f4a2c22009-04-17 01:54:00 +000099 // This does not need to be efficient.
100
Daniel Dunbarc3ccd182009-07-17 18:10:27 +0000101 if (Edit[0] == '^') {
102 const char *Str =
Daniel Dunbard2b20c12010-02-17 21:00:34 +0000103 SaveStringInSet(SavedStrings, Edit.substr(1));
Daniel Dunbarc3ccd182009-07-17 18:10:27 +0000104 OS << "### Adding argument " << Str << " at beginning\n";
105 Args.insert(Args.begin() + 1, Str);
106 } else if (Edit[0] == '+') {
107 const char *Str =
Daniel Dunbard2b20c12010-02-17 21:00:34 +0000108 SaveStringInSet(SavedStrings, Edit.substr(1));
Daniel Dunbarc3ccd182009-07-17 18:10:27 +0000109 OS << "### Adding argument " << Str << " at end\n";
110 Args.push_back(Str);
Daniel Dunbard2b20c12010-02-17 21:00:34 +0000111 } else if (Edit[0] == 's' && Edit[1] == '/' && Edit.endswith("/") &&
Chris Lattner0e62c1c2011-07-23 10:55:15 +0000112 Edit.slice(2, Edit.size()-1).find('/') != StringRef::npos) {
113 StringRef MatchPattern = Edit.substr(2).split('/').first;
114 StringRef ReplPattern = Edit.substr(2).split('/').second;
Daniel Dunbard2b20c12010-02-17 21:00:34 +0000115 ReplPattern = ReplPattern.slice(0, ReplPattern.size()-1);
116
117 for (unsigned i = 1, e = Args.size(); i != e; ++i) {
118 std::string Repl = llvm::Regex(MatchPattern).sub(ReplPattern, Args[i]);
119
120 if (Repl != Args[i]) {
121 OS << "### Replacing '" << Args[i] << "' with '" << Repl << "'\n";
122 Args[i] = SaveStringInSet(SavedStrings, Repl);
123 }
124 }
Daniel Dunbarc3ccd182009-07-17 18:10:27 +0000125 } else if (Edit[0] == 'x' || Edit[0] == 'X') {
126 std::string Option = Edit.substr(1, std::string::npos);
127 for (unsigned i = 1; i < Args.size();) {
128 if (Option == Args[i]) {
129 OS << "### Deleting argument " << Args[i] << '\n';
130 Args.erase(Args.begin() + i);
131 if (Edit[0] == 'X') {
132 if (i < Args.size()) {
133 OS << "### Deleting argument " << Args[i] << '\n';
134 Args.erase(Args.begin() + i);
135 } else
136 OS << "### Invalid X edit, end of command line!\n";
137 }
138 } else
139 ++i;
140 }
141 } else if (Edit[0] == 'O') {
142 for (unsigned i = 1; i < Args.size();) {
143 const char *A = Args[i];
144 if (A[0] == '-' && A[1] == 'O' &&
145 (A[2] == '\0' ||
146 (A[3] == '\0' && (A[2] == 's' || A[2] == 'z' ||
147 ('0' <= A[2] && A[2] <= '9'))))) {
148 OS << "### Deleting argument " << Args[i] << '\n';
149 Args.erase(Args.begin() + i);
150 } else
151 ++i;
152 }
153 OS << "### Adding argument " << Edit << " at end\n";
Daniel Dunbard2b20c12010-02-17 21:00:34 +0000154 Args.push_back(SaveStringInSet(SavedStrings, '-' + Edit.str()));
Daniel Dunbarc3ccd182009-07-17 18:10:27 +0000155 } else {
156 OS << "### Unrecognized edit: " << Edit << "\n";
157 }
Daniel Dunbar3f4a2c22009-04-17 01:54:00 +0000158}
159
160/// ApplyQAOverride - Apply a comma separate list of edits to the
161/// input argument lists. See ApplyOneQAOverride.
Chris Lattner0e62c1c2011-07-23 10:55:15 +0000162static void ApplyQAOverride(SmallVectorImpl<const char*> &Args,
Chris Lattner09f8cc82010-03-30 05:39:52 +0000163 const char *OverrideStr,
164 std::set<std::string> &SavedStrings) {
Chris Lattner0e62c1c2011-07-23 10:55:15 +0000165 raw_ostream *OS = &llvm::errs();
Daniel Dunbarc3ccd182009-07-17 18:10:27 +0000166
Daniel Dunbar54091b82009-07-16 21:32:51 +0000167 if (OverrideStr[0] == '#') {
168 ++OverrideStr;
169 OS = &llvm::nulls();
170 }
171
Bob Wilsona19fad72014-01-15 01:41:52 +0000172 *OS << "### CCC_OVERRIDE_OPTIONS: " << OverrideStr << "\n";
Daniel Dunbar3f4a2c22009-04-17 01:54:00 +0000173
174 // This does not need to be efficient.
175
176 const char *S = OverrideStr;
177 while (*S) {
178 const char *End = ::strchr(S, ' ');
179 if (!End)
180 End = S + strlen(S);
181 if (End != S)
Daniel Dunbar54091b82009-07-16 21:32:51 +0000182 ApplyOneQAOverride(*OS, Args, std::string(S, End), SavedStrings);
Daniel Dunbar3f4a2c22009-04-17 01:54:00 +0000183 S = End;
184 if (*S != '\0')
185 ++S;
186 }
187}
188
Daniel Dunbar1c39f3c2009-11-30 07:18:13 +0000189extern int cc1_main(const char **ArgBegin, const char **ArgEnd,
Daniel Dunbar65ca1c62009-11-29 20:58:32 +0000190 const char *Argv0, void *MainAddr);
Daniel Dunbar2fcaa542010-05-20 17:49:16 +0000191extern int cc1as_main(const char **ArgBegin, const char **ArgEnd,
192 const char *Argv0, void *MainAddr);
Daniel Dunbar51cd8f02009-11-19 07:37:51 +0000193
Chris Lattner0e62c1c2011-07-23 10:55:15 +0000194static void ParseProgName(SmallVectorImpl<const char *> &ArgVector,
Joerg Sonnenbergerf6ce2fb2011-03-16 20:15:43 +0000195 std::set<std::string> &SavedStrings,
196 Driver &TheDriver)
197{
198 // Try to infer frontend type and default target from the program name.
199
200 // suffixes[] contains the list of known driver suffixes.
201 // Suffixes are compared against the program name in order.
202 // If there is a match, the frontend type is updated as necessary (CPP/C++).
203 // If there is no match, a second round is done after stripping the last
204 // hyphen and everything following it. This allows using something like
205 // "clang++-2.9".
206
207 // If there is a match in either the first or second round,
208 // the function tries to identify a target as prefix. E.g.
209 // "x86_64-linux-clang" as interpreted as suffix "clang" with
210 // target prefix "x86_64-linux". If such a target prefix is found,
Sebastian Pop422377c2012-01-20 22:01:23 +0000211 // is gets added via -target as implicit first argument.
Joerg Sonnenbergerf6ce2fb2011-03-16 20:15:43 +0000212 static const struct {
213 const char *Suffix;
Hans Wennborg70850d82013-07-18 20:29:38 +0000214 const char *ModeFlag;
Joerg Sonnenbergerf6ce2fb2011-03-16 20:15:43 +0000215 } suffixes [] = {
Hans Wennborg70850d82013-07-18 20:29:38 +0000216 { "clang", 0 },
217 { "clang++", "--driver-mode=g++" },
218 { "clang-c++", "--driver-mode=g++" },
219 { "clang-cc", 0 },
220 { "clang-cpp", "--driver-mode=cpp" },
221 { "clang-g++", "--driver-mode=g++" },
222 { "clang-gcc", 0 },
Hans Wennborge4b031c2013-07-19 20:33:20 +0000223 { "clang-cl", "--driver-mode=cl" },
Hans Wennborg70850d82013-07-18 20:29:38 +0000224 { "cc", 0 },
225 { "cpp", "--driver-mode=cpp" },
Hans Wennborge4b031c2013-07-19 20:33:20 +0000226 { "cl" , "--driver-mode=cl" },
Hans Wennborg70850d82013-07-18 20:29:38 +0000227 { "++", "--driver-mode=g++" },
Joerg Sonnenbergerf6ce2fb2011-03-16 20:15:43 +0000228 };
229 std::string ProgName(llvm::sys::path::stem(ArgVector[0]));
Hans Wennborgae1c5a82014-03-11 23:42:29 +0000230#ifdef _WIN32
231 // Transform to lowercase for case insensitive file systems.
Hans Wennborgbcbc89c2013-08-20 21:47:50 +0000232 std::transform(ProgName.begin(), ProgName.end(), ProgName.begin(),
233 toLowercase);
Hans Wennborgae1c5a82014-03-11 23:42:29 +0000234#endif
Chris Lattner0e62c1c2011-07-23 10:55:15 +0000235 StringRef ProgNameRef(ProgName);
236 StringRef Prefix;
Joerg Sonnenbergerf6ce2fb2011-03-16 20:15:43 +0000237
238 for (int Components = 2; Components; --Components) {
239 bool FoundMatch = false;
240 size_t i;
241
Craig Topper28700722013-07-15 05:44:18 +0000242 for (i = 0; i < sizeof(suffixes) / sizeof(suffixes[0]); ++i) {
Joerg Sonnenbergerf6ce2fb2011-03-16 20:15:43 +0000243 if (ProgNameRef.endswith(suffixes[i].Suffix)) {
244 FoundMatch = true;
Hans Wennborg70850d82013-07-18 20:29:38 +0000245 SmallVectorImpl<const char *>::iterator it = ArgVector.begin();
246 if (it != ArgVector.end())
247 ++it;
248 if (suffixes[i].ModeFlag)
249 ArgVector.insert(it, suffixes[i].ModeFlag);
Joerg Sonnenbergerf6ce2fb2011-03-16 20:15:43 +0000250 break;
251 }
252 }
253
254 if (FoundMatch) {
Chris Lattner0e62c1c2011-07-23 10:55:15 +0000255 StringRef::size_type LastComponent = ProgNameRef.rfind('-',
Joerg Sonnenbergerf6ce2fb2011-03-16 20:15:43 +0000256 ProgNameRef.size() - strlen(suffixes[i].Suffix));
Chris Lattner0e62c1c2011-07-23 10:55:15 +0000257 if (LastComponent != StringRef::npos)
Joerg Sonnenbergerf6ce2fb2011-03-16 20:15:43 +0000258 Prefix = ProgNameRef.slice(0, LastComponent);
259 break;
260 }
261
Chris Lattner0e62c1c2011-07-23 10:55:15 +0000262 StringRef::size_type LastComponent = ProgNameRef.rfind('-');
263 if (LastComponent == StringRef::npos)
Joerg Sonnenbergerf6ce2fb2011-03-16 20:15:43 +0000264 break;
265 ProgNameRef = ProgNameRef.slice(0, LastComponent);
266 }
267
268 if (Prefix.empty())
269 return;
270
271 std::string IgnoredError;
272 if (llvm::TargetRegistry::lookupTarget(Prefix, IgnoredError)) {
Chris Lattner0e62c1c2011-07-23 10:55:15 +0000273 SmallVectorImpl<const char *>::iterator it = ArgVector.begin();
Joerg Sonnenberger39ec1192011-07-07 16:57:26 +0000274 if (it != ArgVector.end())
275 ++it;
Eli Friedmana617d092013-08-20 22:01:43 +0000276 const char* Strings[] =
277 { SaveStringInSet(SavedStrings, std::string("-target")),
278 SaveStringInSet(SavedStrings, Prefix) };
279 ArgVector.insert(it, Strings, Strings + llvm::array_lengthof(Strings));
Joerg Sonnenbergerf6ce2fb2011-03-16 20:15:43 +0000280 }
281}
282
Reid Kleckner61b23b72013-07-18 20:00:53 +0000283namespace {
284 class StringSetSaver : public llvm::cl::StringSaver {
285 public:
286 StringSetSaver(std::set<std::string> &Storage) : Storage(Storage) {}
Craig Toppera798a9d2014-03-02 09:32:10 +0000287 const char *SaveString(const char *Str) override {
Reid Kleckner61b23b72013-07-18 20:00:53 +0000288 return SaveStringInSet(Storage, Str);
289 }
290 private:
291 std::set<std::string> &Storage;
292 };
293}
294
Rafael Espindola77a067a2010-07-19 15:20:12 +0000295int main(int argc_, const char **argv_) {
Daniel Dunbar544ecd12009-03-02 19:59:07 +0000296 llvm::sys::PrintStackTraceOnErrorSignal();
Rafael Espindola77a067a2010-07-19 15:20:12 +0000297 llvm::PrettyStackTraceProgram X(argc_, argv_);
298
David Majnemer3f8f8c92013-10-07 07:33:27 +0000299 SmallVector<const char *, 256> argv;
300 llvm::SpecificBumpPtrAllocator<char> ArgAllocator;
301 llvm::error_code EC = llvm::sys::Process::GetArgumentVector(
302 argv, llvm::ArrayRef<const char *>(argv_, argc_), ArgAllocator);
303 if (EC) {
304 llvm::errs() << "error: couldn't get arguments: " << EC.message() << '\n';
305 return 1;
306 }
307
Rafael Espindola77a067a2010-07-19 15:20:12 +0000308 std::set<std::string> SavedStrings;
Reid Kleckner61b23b72013-07-18 20:00:53 +0000309 StringSetSaver Saver(SavedStrings);
310 llvm::cl::ExpandResponseFiles(Saver, llvm::cl::TokenizeGNUCommandLine, argv);
Daniel Dunbar544ecd12009-03-02 19:59:07 +0000311
Daniel Dunbar2fcaa542010-05-20 17:49:16 +0000312 // Handle -cc1 integrated tools.
Chris Lattner0e62c1c2011-07-23 10:55:15 +0000313 if (argv.size() > 1 && StringRef(argv[1]).startswith("-cc1")) {
314 StringRef Tool = argv[1] + 4;
Daniel Dunbar2fcaa542010-05-20 17:49:16 +0000315
316 if (Tool == "")
Daniel Dunbar9d8416b2010-07-20 02:47:40 +0000317 return cc1_main(argv.data()+2, argv.data()+argv.size(), argv[0],
Daniel Dunbar2fcaa542010-05-20 17:49:16 +0000318 (void*) (intptr_t) GetExecutablePath);
319 if (Tool == "as")
Daniel Dunbar9d8416b2010-07-20 02:47:40 +0000320 return cc1as_main(argv.data()+2, argv.data()+argv.size(), argv[0],
Daniel Dunbar2fcaa542010-05-20 17:49:16 +0000321 (void*) (intptr_t) GetExecutablePath);
322
323 // Reject unknown tools.
324 llvm::errs() << "error: unknown integrated tool '" << Tool << "'\n";
325 return 1;
326 }
Daniel Dunbar1c39f3c2009-11-30 07:18:13 +0000327
Rafael Espindola73d46372009-12-04 19:31:58 +0000328 bool CanonicalPrefixes = true;
Rafael Espindola77a067a2010-07-19 15:20:12 +0000329 for (int i = 1, size = argv.size(); i < size; ++i) {
Chris Lattner0e62c1c2011-07-23 10:55:15 +0000330 if (StringRef(argv[i]) == "-no-canonical-prefixes") {
Rafael Espindola73d46372009-12-04 19:31:58 +0000331 CanonicalPrefixes = false;
332 break;
333 }
334 }
335
Bob Wilsona19fad72014-01-15 01:41:52 +0000336 // Handle CCC_OVERRIDE_OPTIONS, used for editing a command line behind the
Bob Wilson39265b92014-02-23 00:11:56 +0000337 // scenes.
Bob Wilsona19fad72014-01-15 01:41:52 +0000338 if (const char *OverrideStr = ::getenv("CCC_OVERRIDE_OPTIONS")) {
Chad Rosier3e263e42013-02-21 18:56:55 +0000339 // FIXME: Driver shouldn't take extra initial argument.
340 ApplyQAOverride(argv, OverrideStr, SavedStrings);
Chad Rosier3e263e42013-02-21 18:56:55 +0000341 }
342
Rafael Espindola9678d272013-06-26 05:03:40 +0000343 std::string Path = GetExecutablePath(argv[0], CanonicalPrefixes);
Rafael Espindola73d46372009-12-04 19:31:58 +0000344
Douglas Gregor811db4e2012-10-23 22:26:28 +0000345 IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts = new DiagnosticOptions;
Chad Rosierd6f716a2012-03-13 20:09:56 +0000346 {
Ahmed Charlesb8984322014-03-07 20:03:18 +0000347 std::unique_ptr<OptTable> Opts(createDriverOptTable());
Chad Rosierd6f716a2012-03-13 20:09:56 +0000348 unsigned MissingArgIndex, MissingArgCount;
Ahmed Charlesb8984322014-03-07 20:03:18 +0000349 std::unique_ptr<InputArgList> Args(Opts->ParseArgs(
350 argv.begin() + 1, argv.end(), MissingArgIndex, MissingArgCount));
Chad Rosierd6f716a2012-03-13 20:09:56 +0000351 // We ignore MissingArgCount and the return value of ParseDiagnosticArgs.
352 // Any errors that would be diagnosed here will also be diagnosed later,
353 // when the DiagnosticsEngine actually exists.
Douglas Gregor811db4e2012-10-23 22:26:28 +0000354 (void) ParseDiagnosticArgs(*DiagOpts, *Args);
Chad Rosierd6f716a2012-03-13 20:09:56 +0000355 }
356 // Now we can create the DiagnosticsEngine with a properly-filled-out
357 // DiagnosticOptions instance.
Douglas Gregor2dd19f12010-08-18 22:29:43 +0000358 TextDiagnosticPrinter *DiagClient
Douglas Gregor811db4e2012-10-23 22:26:28 +0000359 = new TextDiagnosticPrinter(llvm::errs(), &*DiagOpts);
Reid Klecknerdc74af12013-09-04 01:37:22 +0000360
361 // If the clang binary happens to be named cl.exe for compatibility reasons,
362 // use clang-cl.exe as the prefix to avoid confusion between clang and MSVC.
363 StringRef ExeBasename(llvm::sys::path::filename(Path));
Reid Kleckner1d1844a2013-09-04 03:10:36 +0000364 if (ExeBasename.equals_lower("cl.exe"))
Yaron Keren39f02ac2013-11-06 21:57:50 +0000365 ExeBasename = "clang-cl.exe";
Reid Klecknerdc74af12013-09-04 01:37:22 +0000366 DiagClient->setPrefix(ExeBasename);
367
Dylan Noblesmithc95d8192012-02-20 14:00:23 +0000368 IntrusiveRefCntPtr<DiagnosticIDs> DiagID(new DiagnosticIDs());
Chad Rosierd6f716a2012-03-13 20:09:56 +0000369
Douglas Gregor811db4e2012-10-23 22:26:28 +0000370 DiagnosticsEngine Diags(DiagID, &*DiagOpts, DiagClient);
Chad Rosier5f15a352013-01-15 01:21:53 +0000371 ProcessWarningOptions(Diags, *DiagOpts, /*ReportDiags=*/false);
Daniel Dunbard9b80c22009-03-18 02:11:26 +0000372
Rafael Espindola9678d272013-06-26 05:03:40 +0000373 Driver TheDriver(Path, llvm::sys::getDefaultTargetTriple(), "a.out", Diags);
Daniel Dunbardae1d342009-04-01 19:08:46 +0000374
Daniel Dunbar88979912010-08-01 22:29:51 +0000375 // Attempt to find the original path used to invoke the driver, to determine
376 // the installed path. We do this manually, because we want to support that
377 // path being a symlink.
Michael J. Spencer740857f2010-12-21 16:45:57 +0000378 {
Dylan Noblesmithf1a13f22012-02-13 12:32:26 +0000379 SmallString<128> InstalledPath(argv[0]);
Daniel Dunbar88979912010-08-01 22:29:51 +0000380
Michael J. Spencer740857f2010-12-21 16:45:57 +0000381 // Do a PATH lookup, if there are no directory components.
382 if (llvm::sys::path::filename(InstalledPath) == InstalledPath) {
Rafael Espindola0725a7d2013-06-13 19:25:45 +0000383 std::string Tmp = llvm::sys::FindProgramByName(
Michael J. Spencer740857f2010-12-21 16:45:57 +0000384 llvm::sys::path::filename(InstalledPath.str()));
385 if (!Tmp.empty())
Rafael Espindola0725a7d2013-06-13 19:25:45 +0000386 InstalledPath = Tmp;
Michael J. Spencer740857f2010-12-21 16:45:57 +0000387 }
388 llvm::sys::fs::make_absolute(InstalledPath);
389 InstalledPath = llvm::sys::path::parent_path(InstalledPath);
390 bool exists;
391 if (!llvm::sys::fs::exists(InstalledPath.str(), exists) && exists)
392 TheDriver.setInstalledDir(InstalledPath);
Daniel Dunbar88979912010-08-01 22:29:51 +0000393 }
Daniel Dunbar88979912010-08-01 22:29:51 +0000394
Joerg Sonnenbergerf6ce2fb2011-03-16 20:15:43 +0000395 llvm::InitializeAllTargets();
396 ParseProgName(argv, SavedStrings, TheDriver);
Joerg Sonnenbergerb86f5f42011-03-06 23:31:01 +0000397
Daniel Dunbar6a8efa82010-03-20 08:01:59 +0000398 // Handle CC_PRINT_OPTIONS and CC_PRINT_OPTIONS_FILE.
399 TheDriver.CCPrintOptions = !!::getenv("CC_PRINT_OPTIONS");
400 if (TheDriver.CCPrintOptions)
401 TheDriver.CCPrintOptionsFilename = ::getenv("CC_PRINT_OPTIONS_FILE");
402
Daniel Dunbarac540b32011-02-02 21:11:35 +0000403 // Handle CC_PRINT_HEADERS and CC_PRINT_HEADERS_FILE.
404 TheDriver.CCPrintHeaders = !!::getenv("CC_PRINT_HEADERS");
405 if (TheDriver.CCPrintHeaders)
406 TheDriver.CCPrintHeadersFilename = ::getenv("CC_PRINT_HEADERS_FILE");
407
Daniel Dunbar529c03b2011-04-07 18:01:20 +0000408 // Handle CC_LOG_DIAGNOSTICS and CC_LOG_DIAGNOSTICS_FILE.
409 TheDriver.CCLogDiagnostics = !!::getenv("CC_LOG_DIAGNOSTICS");
410 if (TheDriver.CCLogDiagnostics)
411 TheDriver.CCLogDiagnosticsFilename = ::getenv("CC_LOG_DIAGNOSTICS_FILE");
412
Ahmed Charlesb8984322014-03-07 20:03:18 +0000413 std::unique_ptr<Compilation> C(TheDriver.BuildCompilation(argv));
Daniel Dunbar1acb0eb2009-03-21 00:40:53 +0000414 int Res = 0;
Chad Rosierdd60e092013-01-29 20:15:05 +0000415 SmallVector<std::pair<int, const Command *>, 4> FailingCommands;
Daniel Dunbar1acb0eb2009-03-21 00:40:53 +0000416 if (C.get())
Chad Rosierdd60e092013-01-29 20:15:05 +0000417 Res = TheDriver.ExecuteCompilation(*C, FailingCommands);
Chad Rosierbe10f982011-08-02 17:58:04 +0000418
Chad Rosier681e4b82012-04-20 17:08:59 +0000419 // Force a crash to test the diagnostics.
Richard Smith940a6d72012-12-25 21:56:27 +0000420 if (::getenv("FORCE_CLANG_DIAGNOSTICS_CRASH")) {
421 Diags.Report(diag::err_drv_force_crash) << "FORCE_CLANG_DIAGNOSTICS_CRASH";
Chad Rosierdd60e092013-01-29 20:15:05 +0000422 const Command *FailingCommand = 0;
423 FailingCommands.push_back(std::make_pair(-1, FailingCommand));
Richard Smith940a6d72012-12-25 21:56:27 +0000424 }
Chad Rosier681e4b82012-04-20 17:08:59 +0000425
Chad Rosierdd60e092013-01-29 20:15:05 +0000426 for (SmallVectorImpl< std::pair<int, const Command *> >::iterator it =
427 FailingCommands.begin(), ie = FailingCommands.end(); it != ie; ++it) {
428 int CommandRes = it->first;
429 const Command *FailingCommand = it->second;
430 if (!Res)
431 Res = CommandRes;
432
433 // If result status is < 0, then the driver command signalled an error.
434 // If result status is 70, then the driver command reported a fatal error.
435 // In these cases, generate additional diagnostic information if possible.
436 if (CommandRes < 0 || CommandRes == 70) {
437 TheDriver.generateCompilationDiagnostics(*C, FailingCommand);
Chad Rosierdd60e092013-01-29 20:15:05 +0000438 break;
439 }
440 }
Chad Rosierbe10f982011-08-02 17:58:04 +0000441
Chris Lattner09f8cc82010-03-30 05:39:52 +0000442 // If any timers were active but haven't been destroyed yet, print their
443 // results now. This happens in -disable-free mode.
444 llvm::TimerGroup::printAll(llvm::errs());
445
Daniel Dunbar2608c542009-03-18 01:38:48 +0000446 llvm::llvm_shutdown();
447
NAKAMURA Takumied5bbe92012-07-17 05:09:29 +0000448#ifdef _WIN32
449 // Exit status should not be negative on Win32, unless abnormal termination.
450 // Once abnormal termiation was caught, negative status should not be
451 // propagated.
452 if (Res < 0)
453 Res = 1;
454#endif
455
Chad Rosierdd60e092013-01-29 20:15:05 +0000456 // If we have multiple failing commands, we return the result of the first
457 // failing command.
Daniel Dunbar1acb0eb2009-03-21 00:40:53 +0000458 return Res;
Daniel Dunbar544ecd12009-03-02 19:59:07 +0000459}