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1 : //===-- 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 : //
10 : // This is the entry point to the clang driver; it is a thin wrapper
11 : // for functionality in the Driver clang library.
12 : //
13 : //===----------------------------------------------------------------------===//
14 :
15 : #include "clang/Driver/Compilation.h"
16 : #include "clang/Driver/Driver.h"
17 : #include "clang/Driver/Option.h"
18 :
19 : #include "llvm/ADT/SmallString.h"
20 : #include "llvm/ADT/OwningPtr.h"
21 : #include "llvm/Config/config.h"
22 : #include "llvm/Support/ManagedStatic.h"
23 : #include "llvm/Support/PrettyStackTrace.h"
24 : #include "llvm/Support/raw_ostream.h"
25 : #include "llvm/System/Host.h"
26 : #include "llvm/System/Path.h"
27 : #include "llvm/System/Signals.h"
28 : using namespace clang;
29 : using namespace clang::driver;
30 :
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31 239: class DriverDiagnosticPrinter : public DiagnosticClient {
32 : std::string ProgName;
33 : llvm::raw_ostream &OS;
34 :
35 : public:
36 : DriverDiagnosticPrinter(const std::string _ProgName,
37 239: llvm::raw_ostream &_OS)
38 : : ProgName(_ProgName),
39 239: OS(_OS) {}
40 :
41 : virtual void HandleDiagnostic(Diagnostic::Level DiagLevel,
42 : const DiagnosticInfo &Info);
43 : };
44 :
45 : void DriverDiagnosticPrinter::HandleDiagnostic(Diagnostic::Level Level,
46 40: const DiagnosticInfo &Info) {
47 40: OS << ProgName << ": ";
48 :
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49 40: switch (Level) {
50 0: case Diagnostic::Ignored: assert(0 && "Invalid diagnostic type");
51 0: case Diagnostic::Note: OS << "note: "; break;
52 29: case Diagnostic::Warning: OS << "warning: "; break;
53 11: case Diagnostic::Error: OS << "error: "; break;
54 0: case Diagnostic::Fatal: OS << "fatal error: "; break;
55 : }
56 :
57 40: llvm::SmallString<100> OutStr;
58 40: Info.FormatDiagnostic(OutStr);
59 40: OS.write(OutStr.begin(), OutStr.size());
60 40: OS << '\n';
61 40: }
62 :
63 239: llvm::sys::Path GetExecutablePath(const char *Argv0, bool CanonicalPrefixes) {
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64 239: if (!CanonicalPrefixes)
65 0: return llvm::sys::Path(Argv0);
66 :
67 : // This just needs to be some symbol in the binary; C++ doesn't
68 : // allow taking the address of ::main however.
69 239: void *P = (void*) (intptr_t) GetExecutablePath;
70 239: return llvm::sys::Path::GetMainExecutable(Argv0, P);
71 : }
72 :
73 : static const char *SaveStringInSet(std::set<std::string> &SavedStrings,
74 14: const std::string &S) {
75 14: return SavedStrings.insert(S).first->c_str();
76 : }
77 :
78 : /// ApplyQAOverride - Apply a list of edits to the input argument lists.
79 : ///
80 : /// The input string is a space separate list of edits to perform,
81 : /// they are applied in order to the input argument lists. Edits
82 : /// should be one of the following forms:
83 : ///
84 : /// '#': Silence information about the changes to the command line arguments.
85 : ///
86 : /// '^': Add FOO as a new argument at the beginning of the command line.
87 : ///
88 : /// '+': Add FOO as a new argument at the end of the command line.
89 : ///
90 : /// 's/XXX/YYY/': Replace the literal argument XXX by YYY in the
91 : /// command line.
92 : ///
93 : /// 'xOPTION': Removes all instances of the literal argument OPTION.
94 : ///
95 : /// 'XOPTION': Removes all instances of the literal argument OPTION,
96 : /// and the following argument.
97 : ///
98 : /// 'Ox': Removes all flags matching 'O' or 'O[sz0-9]' and adds 'Ox'
99 : /// at the end of the command line.
100 : ///
101 : /// \param OS - The stream to write edit information to.
102 : /// \param Args - The vector of command line arguments.
103 : /// \param Edit - The override command to perform.
104 : /// \param SavedStrings - Set to use for storing string representations.
105 : void ApplyOneQAOverride(llvm::raw_ostream &OS,
106 : std::vector<const char*> &Args,
107 : const std::string &Edit,
108 12: std::set<std::string> &SavedStrings) {
109 : // This does not need to be efficient.
110 :
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111 12: if (Edit[0] == '^') {
112 : const char *Str =
113 1: SaveStringInSet(SavedStrings, Edit.substr(1, std::string::npos));
114 1: OS << "### Adding argument " << Str << " at beginning\n";
115 1: Args.insert(Args.begin() + 1, Str);
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116 11: } else if (Edit[0] == '+') {
117 : const char *Str =
118 8: SaveStringInSet(SavedStrings, Edit.substr(1, std::string::npos));
119 8: OS << "### Adding argument " << Str << " at end\n";
120 8: Args.push_back(Str);
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121 3: } else if (Edit[0] == 'x' || Edit[0] == 'X') {
122 2: std::string Option = Edit.substr(1, std::string::npos);
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123 25: for (unsigned i = 1; i < Args.size();) {
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124 21: if (Option == Args[i]) {
125 3: OS << "### Deleting argument " << Args[i] << '\n';
126 3: Args.erase(Args.begin() + i);
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127 3: if (Edit[0] == 'X') {
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128 1: if (i < Args.size()) {
129 1: OS << "### Deleting argument " << Args[i] << '\n';
130 1: Args.erase(Args.begin() + i);
131 : } else
132 0: OS << "### Invalid X edit, end of command line!\n";
133 : }
134 : } else
135 18: ++i;
136 2: }
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137 1: } else if (Edit[0] == 'O') {
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138 10: for (unsigned i = 1; i < Args.size();) {
139 8: const char *A = Args[i];
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140 14: if (A[0] == '-' && A[1] == 'O' &&
141 : (A[2] == '\0' ||
142 : (A[3] == '\0' && (A[2] == 's' || A[2] == 'z' ||
143 : ('0' <= A[2] && A[2] <= '9'))))) {
144 6: OS << "### Deleting argument " << Args[i] << '\n';
145 6: Args.erase(Args.begin() + i);
146 : } else
147 2: ++i;
148 : }
149 1: OS << "### Adding argument " << Edit << " at end\n";
150 1: Args.push_back(SaveStringInSet(SavedStrings, '-' + Edit));
151 : } else {
152 0: OS << "### Unrecognized edit: " << Edit << "\n";
153 : }
154 12: }
155 :
156 : /// ApplyQAOverride - Apply a comma separate list of edits to the
157 : /// input argument lists. See ApplyOneQAOverride.
158 : void ApplyQAOverride(std::vector<const char*> &Args, const char *OverrideStr,
159 1: std::set<std::string> &SavedStrings) {
160 1: llvm::raw_ostream *OS = &llvm::errs();
161 :
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162 1: if (OverrideStr[0] == '#') {
163 1: ++OverrideStr;
164 1: OS = &llvm::nulls();
165 : }
166 :
167 1: *OS << "### QA_OVERRIDE_GCC3_OPTIONS: " << OverrideStr << "\n";
168 :
169 : // This does not need to be efficient.
170 :
171 1: const char *S = OverrideStr;
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172 15: while (*S) {
173 13: const char *End = ::strchr(S, ' ');
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174 13: if (!End)
175 0: End = S + strlen(S);
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176 13: if (End != S)
177 12: ApplyOneQAOverride(*OS, Args, std::string(S, End), SavedStrings);
178 13: S = End;
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179 13: if (*S != '\0')
180 13: ++S;
181 : }
182 1: }
183 :
184 : extern int cc1_main(const char **ArgBegin, const char **ArgEnd,
185 : const char *Argv0, void *MainAddr);
186 :
187 2753: int main(int argc, const char **argv) {
188 2753: llvm::sys::PrintStackTraceOnErrorSignal();
189 2753: llvm::PrettyStackTraceProgram X(argc, argv);
190 :
191 : // Dispatch to cc1_main if appropriate.
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192 2753: if (argc > 1 && llvm::StringRef(argv[1]) == "-cc1")
193 : return cc1_main(argv+2, argv+argc, argv[0],
194 2514: (void*) (intptr_t) GetExecutablePath);
195 :
196 239: bool CanonicalPrefixes = true;
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197 2192: for (int i = 1; i < argc; ++i) {
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198 1953: if (llvm::StringRef(argv[i]) == "-no-canonical-prefixes") {
199 0: CanonicalPrefixes = false;
200 0: break;
201 : }
202 : }
203 :
204 239: llvm::sys::Path Path = GetExecutablePath(argv[0], CanonicalPrefixes);
205 :
206 239: DriverDiagnosticPrinter DiagClient(Path.getBasename(), llvm::errs());
207 :
208 239: Diagnostic Diags(&DiagClient);
209 :
210 : #ifdef CLANG_IS_PRODUCTION
211 : bool IsProduction = true;
212 : #else
213 239: bool IsProduction = false;
214 : #endif
215 : Driver TheDriver(Path.getBasename(), Path.getDirname(),
216 : llvm::sys::getHostTriple(),
217 239: "a.out", IsProduction, Diags);
218 :
219 : // Check for ".*++" or ".*++-[^-]*" to determine if we are a C++
220 : // compiler. This matches things like "c++", "clang++", and "clang++-1.1".
221 : //
222 : // Note that we intentionally want to use argv[0] here, to support "clang++"
223 : // being a symlink.
224 : //
225 : // We use *argv instead of argv[0] to work around a bogus g++ warning.
226 239: std::string ProgName(llvm::sys::Path(*argv).getBasename());
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227 239: if (llvm::StringRef(ProgName).endswith("++") ||
228 : llvm::StringRef(ProgName).rsplit('-').first.endswith("++")) {
229 0: TheDriver.CCCIsCXX = true;
230 0: TheDriver.CCCGenericGCCName = "g++";
231 : }
232 :
233 239: llvm::OwningPtr<Compilation> C;
234 :
235 : // Handle QA_OVERRIDE_GCC3_OPTIONS and CCC_ADD_ARGS, used for editing a
236 : // command line behind the scenes.
237 239: std::set<std::string> SavedStrings;
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238 239: if (const char *OverrideStr = ::getenv("QA_OVERRIDE_GCC3_OPTIONS")) {
239 : // FIXME: Driver shouldn't take extra initial argument.
240 1: std::vector<const char*> StringPointers(argv, argv + argc);
241 :
242 1: ApplyQAOverride(StringPointers, OverrideStr, SavedStrings);
243 :
244 : C.reset(TheDriver.BuildCompilation(StringPointers.size(),
245 1: &StringPointers[0]));
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246 238: } else if (const char *Cur = ::getenv("CCC_ADD_ARGS")) {
247 1: std::vector<const char*> StringPointers;
248 :
249 : // FIXME: Driver shouldn't take extra initial argument.
250 1: StringPointers.push_back(argv[0]);
251 :
252 3: for (;;) {
253 4: const char *Next = strchr(Cur, ',');
254 :
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255 4: if (Next) {
256 : StringPointers.push_back(SaveStringInSet(SavedStrings,
257 3: std::string(Cur, Next)));
258 3: Cur = Next + 1;
259 : } else {
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260 1: if (*Cur != '\0')
261 1: StringPointers.push_back(SaveStringInSet(SavedStrings, Cur));
262 : break;
263 : }
264 : }
265 :
266 1: StringPointers.insert(StringPointers.end(), argv + 1, argv + argc);
267 :
268 : C.reset(TheDriver.BuildCompilation(StringPointers.size(),
269 1: &StringPointers[0]));
270 : } else
271 237: C.reset(TheDriver.BuildCompilation(argc, argv));
272 :
273 239: int Res = 0;
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274 239: if (C.get())
275 239: Res = TheDriver.ExecuteCompilation(*C);
276 :
277 239: llvm::llvm_shutdown();
278 :
279 239: return Res;
280 : }
Generated: 2010-02-10 01:31 by zcov