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source: driver/cc1.cc @ 16a18f3

ADTarm-ehast-experimentalenumforall-pointer-decayjacob/cs343-translationjenkins-sandboxnew-astnew-ast-unique-exprpthread-emulationqualifiedEnum

Last change on this file since 16a18f3 was 0bf5340, checked in by Peter A. Buhr <pabuhr@…>, 5 years ago
updates after code review, use suffix .ifa for cc1 stage1 temp-file
Property mode set to `100644`
File size: 17.1 KB

Line
1	//
2	// Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo
3	//
4	// The contents of this file are covered under the licence agreement in the
5	// file "LICENCE" distributed with Cforall.
6	//
7	// cc1.cc --
8	//
9	// Author : Peter A. Buhr
10	// Created On : Fri Aug 26 14:23:51 2005
11	// Last Modified By : Peter A. Buhr
12	// Last Modified On : Mon Sep 9 17:50:53 2019
13	// Update Count : 384
14	//
15
16	#include <iostream>
17	using std::cerr;
18	using std::endl;
19	#include <string>
20	using std::string;
21	#include <algorithm> // find
22	#include <cstdio> // stderr, stdout, perror, fprintf
23	#include <cstdlib> // getenv, exit, mkstemp
24	#include <unistd.h> // execvp, fork, unlink
25	#include <sys/wait.h> // wait
26	#include <fcntl.h>
27
28
29	#include "config.h" // configure info
30
31
32	//#define __DEBUG_H__
33
34
35	static string compiler_path( CFA_BACKEND_CC ); // C compiler path/name
36	static bool CFA_flag = false; // -CFA flag
37	static bool save_temps = false; // -save-temps flag
38	static string o_file;
39	static string bprefix;
40
41
42	static bool prefix( const string & arg, const string & pre ) {
43	return arg.substr( 0, pre.size() ) == pre;
44	} // prefix
45
46	static void suffix( const string & arg, const char * args[], int & nargs ) {
47	enum { NumSuffixes = 3 };
48	static const string suffixes[NumSuffixes] = { "cfa", "hfa", "ifa" };
49
50	size_t dot = arg.find_last_of( "." );
51	if ( dot == string::npos ) return;
52	const string * end = suffixes + NumSuffixes;
53	if ( std::find( suffixes, end, arg.substr( dot + 1 ) ) != end ) {
54	args[nargs++] = "-x";
55	args[nargs++] = "c";
56	} // if
57	} // suffix
58
59
60	static string __CFA_FLAGPREFIX__( "__CFA_FLAG" ); // "N__=" suffix
61
62	static void checkEnv1( const char * args[], int & nargs ) { // stage 1
63	extern char ** environ;
64
65	for ( int i = 0; environ[i]; i += 1 ) {
66	string arg( environ[i] );
67	#ifdef __DEBUG_H__
68	cerr << "env arg:\"" << arg << "\"" << endl;
69	#endif // __DEBUG_H__
70
71	if ( prefix( arg, __CFA_FLAGPREFIX__ ) ) {
72	string val( arg.substr( arg.find_first_of( "=" ) + 1 ) );
73	if ( prefix( val, "-compiler=" ) ) {
74	compiler_path = val.substr( 10 );
75	} // if
76	} // if
77	} // for
78	} // checkEnv1
79
80
81	static void checkEnv2( const char * args[], int & nargs ) { // stage 2
82	extern char ** environ;
83
84	for ( int i = 0; environ[i]; i += 1 ) {
85	string arg( environ[i] );
86	#ifdef __DEBUG_H__
87	cerr << "env arg:\"" << arg << "\"" << endl;
88	#endif // __DEBUG_H__
89
90	if ( prefix( arg, __CFA_FLAGPREFIX__ ) ) {
91	string val( arg.substr( arg.find_first_of( "=" ) + 1 ) );
92	if ( prefix( val, "-compiler=" ) ) {
93	compiler_path = val.substr( 10 );
94	} else if ( val == "-CFA" ) {
95	CFA_flag = true;
96	} else if ( val == "-save-temps" ) {
97	save_temps = true;
98	} else if ( prefix( val, "-o=" ) ) { // output file for -CFA
99	o_file = val.substr( 3 );
100	} else if ( prefix( val, "-B=" ) ) { // location of cfa-cpp
101	bprefix = val.substr( 3 );
102	} else { // normal flag for cfa-cpp
103	args[nargs++] = ( *new string( arg.substr( arg.find_first_of( "=" ) + 1 ) ) ).c_str();
104	} // if
105	} // if
106	} // for
107	} // checkEnv2
108
109
110	static char tmpname[] = P_tmpdir "/CFAXXXXXX.ifa";
111	static int tmpfilefd = -1;
112	static bool startrm = false;
113
114	static void rmtmpfile() {
115	if ( tmpfilefd == -1 ) return; // RACE, file created ?
116
117	startrm = true; // RACE with C-c C-c
118	if ( unlink( tmpname ) == -1 ) { // remove tmpname
119	perror ( "CC1 Translator error: failed, unlink" );
120	exit( EXIT_FAILURE );
121	} // if
122	tmpfilefd = -1; // mark removed
123	} // rmtmpfile
124
125
126	static void sigTermHandler( int ) { // C-c C-c
127	if ( startrm ) return; // return and let rmtmpfile finish, and then program finishes
128
129	if ( tmpfilefd != -1 ) { // RACE, file created ?
130	rmtmpfile(); // remove tmpname
131	} // if
132	exit( EXIT_FAILURE ); // terminate
133	} // sigTermHandler
134
135
136	static void Stage1( const int argc, const char * const argv[] ) {
137	int code;
138	string arg;
139
140	const char * cpp_in = nullptr;
141	const char * cpp_out = nullptr;
142
143	bool cpp_flag = false;
144	bool o_flag = false;
145
146	const char * args[argc + 100]; // leave space for 100 additional cpp command line values
147	int nargs = 1; // number of arguments in args list; 0 => command name
148
149	#ifdef __DEBUG_H__
150	cerr << "Stage1" << endl;
151	#endif // __DEBUG_H__
152	checkEnv1( args, nargs ); // arguments passed via environment variables
153	#ifdef __DEBUG_H__
154	for ( int i = 1; i < argc; i += 1 ) {
155	cerr << "argv[" << i << "]:\"" << argv[i] << "\"" << endl;
156	} // for
157	#endif // __DEBUG_H__
158
159	// process all the arguments
160
161	for ( int i = 1; i < argc; i += 1 ) {
162	arg = argv[i];
163	if ( prefix( arg, "-" ) ) {
164	// strip g++ flags that are inappropriate or cause duplicates in subsequent passes
165
166	if ( arg == "-quiet" ) {
167	} else if ( arg == "-imultilib" \|\| arg == "-imultiarch" ) {
168	i += 1; // and the argument
169	} else if ( prefix( arg, "-A" ) ) {
170	} else if ( prefix( arg, "-D__GNU" ) ) {
171	//********
172	// GCC 5.6.0 SEPARATED THE -D FROM THE ARGUMENT!
173	//********
174	} else if ( arg == "-D" && prefix( argv[i + 1], "__GNU" ) ) {
175	i += 1; // and the argument
176
177	// strip flags controlling cpp step
178
179	} else if ( arg == "-D__CPP__" ) {
180	cpp_flag = true;
181	} else if ( arg == "-D" && string( argv[i + 1] ) == "__CPP__" ) {
182	i += 1; // and the argument
183	cpp_flag = true;
184
185	// all other flags
186
187	} else if ( arg == "-o" ) {
188	i += 1;
189	o_flag = true;
190	cpp_out = argv[i];
191	} else {
192	args[nargs++] = argv[i]; // pass the flag along
193	// CPP flags with an argument
194	if ( arg == "-D" \|\| arg == "-U" \|\| arg == "-I" \|\| arg == "-MF" \|\| arg == "-MT" \|\| arg == "-MQ" \|\|
195	arg == "-include" \|\| arg == "-imacros" \|\| arg == "-idirafter" \|\| arg == "-iprefix" \|\|
196	arg == "-iwithprefix" \|\| arg == "-iwithprefixbefore" \|\| arg == "-isystem" \|\| arg == "-isysroot" ) {
197	i += 1;
198	args[nargs++] = argv[i]; // pass the argument along
199	#ifdef __DEBUG_H__
200	cerr << "argv[" << i << "]:\"" << argv[i] << "\"" << endl;
201	#endif // __DEBUG_H__
202	} else if ( arg == "-MD" \|\| arg == "-MMD" ) {
203	args[nargs++] = "-MF"; // insert before file
204	i += 1;
205	args[nargs++] = argv[i]; // pass the argument along
206	#ifdef __DEBUG_H__
207	cerr << "argv[" << i << "]:\"" << argv[i] << "\"" << endl;
208	#endif // __DEBUG_H__
209	} // if
210	} // if
211	} else { // obtain input and possibly output files
212	if ( cpp_in == nullptr ) {
213	cpp_in = argv[i];
214	#ifdef __DEBUG_H__
215	cerr << "cpp_in:\"" << cpp_in << "\"" << endl;
216	#endif // __DEBUG_H__
217	} else if ( cpp_out == nullptr ) {
218	cpp_out = argv[i];
219	#ifdef __DEBUG_H__
220	cerr << "cpp_out:\"" << cpp_out << "\""<< endl;
221	#endif // __DEBUG_H__
222	} else {
223	cerr << "Usage: " << argv[0] << " input-file [output-file] [options]" << endl;
224	exit( EXIT_FAILURE );
225	} // if
226	} // if
227	} // for
228
229	#ifdef __DEBUG_H__
230	cerr << "args:";
231	for ( int i = 1; i < nargs; i += 1 ) {
232	cerr << " " << args[i];
233	} // for
234	if ( cpp_in != nullptr ) cerr << " " << cpp_in;
235	if ( cpp_out != nullptr ) cerr << " " << cpp_out;
236	cerr << endl;
237	#endif // __DEBUG_H__
238
239	if ( cpp_in == nullptr ) {
240	cerr << "Usage: " << argv[0] << " input-file [output-file] [options]" << endl;
241	exit( EXIT_FAILURE );
242	} // if
243
244	if ( cpp_flag ) {
245	// The -E flag is specified on the cfa command so only run the preprocessor and output is written to standard
246	// output or -o. The call to cfa has a -E so it does not have to be added to the argument list.
247
248	args[0] = compiler_path.c_str();
249	suffix( cpp_in, args, nargs ); // check suffix
250	args[nargs++] = cpp_in;
251	if ( o_flag ) { // location for output
252	args[nargs++] = "-o";
253	} // if
254	args[nargs++] = cpp_out;
255	args[nargs] = nullptr; // terminate argument list
256
257	#ifdef __DEBUG_H__
258	cerr << "nargs: " << nargs << endl;
259	for ( int i = 0; args[i] != nullptr; i += 1 ) {
260	cerr << args[i] << " ";
261	} // for
262	cerr << endl;
263	#endif // __DEBUG_H__
264
265	execvp( args[0], (char * const *)args ); // should not return
266	perror( "CC1 Translator error: stage 1, execvp" );
267	exit( EXIT_FAILURE );
268	} // if
269
270	// Run the C preprocessor and save the output in the given file.
271
272	if ( fork() == 0 ) { // child process ?
273	// -o xxx.ii cannot be used to write the output file from cpp because no output file is created if cpp detects
274	// an error (e.g., cannot find include file). Whereas, output is always generated, even when there is an error,
275	// when cpp writes to stdout. Hence, stdout is redirected into the temporary file.
276	if ( freopen( cpp_out, "w", stdout ) == nullptr ) { // redirect stdout to output file
277	perror( "CC1 Translator error: stage 1, freopen" );
278	exit( EXIT_FAILURE );
279	} // if
280
281	args[0] = compiler_path.c_str();
282	suffix( cpp_in, args, nargs ); // check suffix
283	args[nargs++] = cpp_in; // input to cpp
284	args[nargs] = nullptr; // terminate argument list
285
286	#ifdef __DEBUG_H__
287	cerr << "cpp nargs: " << nargs << endl;
288	for ( int i = 0; args[i] != nullptr; i += 1 ) {
289	cerr << args[i] << " ";
290	} // for
291	cerr << endl;
292	#endif // __DEBUG_H__
293
294	execvp( args[0], (char * const *)args ); // should not return
295	perror( "CC1 Translator error: stage 1 cpp, execvp" );
296	cerr << " invoked " << args[0] << endl;
297	exit( EXIT_FAILURE );
298	} // if
299
300	wait( &code ); // wait for child to finish
301
302	#ifdef __DEBUG_H__
303	cerr << "return code from cpp:" << WEXITSTATUS(code) << endl;
304	#endif // __DEBUG_H__
305
306	if ( WIFSIGNALED(code) ) { // child failed ?
307	cerr << "CC1 Translator error: stage 1, child failed " << WTERMSIG(code) << endl;
308	exit( EXIT_FAILURE );
309	} // if
310
311	exit( WEXITSTATUS(code) ); // bad cpp result stops top-level gcc
312	} // Stage1
313
314
315	static void Stage2( const int argc, const char * const * argv ) {
316	int code;
317	string arg;
318
319	const char * cpp_in = nullptr;
320	const char * cpp_out = nullptr;
321
322	const char * args[argc + 100]; // leave space for 100 additional cfa command line values
323	int nargs = 1; // number of arguments in args list; 0 => command name
324	const char * cargs[20]; // leave space for 20 additional cfa-cpp command line values
325	int ncargs = 1; // 0 => command name
326
327	#ifdef __DEBUG_H__
328	cerr << "Stage2" << endl;
329	#endif // __DEBUG_H__
330	checkEnv2( cargs, ncargs ); // arguments passed via environment variables
331	#ifdef __DEBUG_H__
332	for ( int i = 1; i < argc; i += 1 ) {
333	cerr << "argv[" << i << "]:\"" << argv[i] << "\"" << endl;
334	} // for
335	#endif // __DEBUG_H__
336
337	// process all the arguments
338
339	for ( int i = 1; i < argc; i += 1 ) {
340	arg = argv[i];
341	if ( prefix( arg, "-" ) ) {
342	// strip inappropriate flags
343
344	if ( arg == "-quiet" \|\| arg == "-version" \|\| arg == "-fpreprocessed" \|\|
345	// Currently CFA does not suppose precompiled .h files.
346	prefix( arg, "--output-pch" ) ) {
347
348	// strip inappropriate flags with an argument
349
350	} else if ( arg == "-auxbase" \|\| arg == "-auxbase-strip" \|\| arg == "-dumpbase" ) {
351	i += 1;
352	#ifdef __DEBUG_H__
353	cerr << "arg:\"" << argv[i] << "\"" << endl;
354	#endif // __DEBUG_H__
355
356	// all other flags
357
358	} else {
359	args[nargs++] = argv[i]; // pass the flag along
360	if ( arg == "-o" ) {
361	i += 1;
362	cpp_out = argv[i];
363	args[nargs++] = argv[i]; // pass the argument along
364	#ifdef __DEBUG_H__
365	cerr << "arg:\"" << argv[i] << "\"" << endl;
366	#endif // __DEBUG_H__
367	} // if
368	} // if
369	} else { // obtain input and possibly output files
370	if ( cpp_in == nullptr ) {
371	cpp_in = argv[i];
372	#ifdef __DEBUG_H__
373	cerr << "cpp_in:\"" << cpp_in << "\"" << endl;
374	#endif // __DEBUG_H__
375	} else if ( cpp_out == nullptr ) {
376	cpp_out = argv[i];
377	#ifdef __DEBUG_H__
378	cerr << "cpp_out:\"" << cpp_out << "\""<< endl;
379	#endif // __DEBUG_H__
380	} else {
381	cerr << "Usage: " << argv[0] << " more than two files specified" << endl;
382	exit( EXIT_FAILURE );
383	} // if
384	} // if
385	} // for
386
387	if ( cpp_in == nullptr ) {
388	cerr << "Usage: " << argv[0] << " missing input file" << endl;
389	exit( EXIT_FAILURE );
390	} // if
391	if ( cpp_out == nullptr ) {
392	cerr << "Usage: " << argv[0] << " missing output file" << endl;
393	exit( EXIT_FAILURE );
394	} // if
395
396	// Create a temporary file, if needed, to store output of the cfa-cpp preprocessor. Cannot be created in forked
397	// process because variables tmpname and tmpfilefd are cloned.
398
399	string cfa_cpp_out;
400
401	if ( ! CFA_flag ) { // run compiler ?
402	if ( save_temps ) {
403	cfa_cpp_out = cpp_in;
404	size_t dot = cfa_cpp_out.find_last_of( "." );
405	if ( dot == string::npos ) {
406	cerr << "CC1 Translator error: stage 2, bad file name " << endl;
407	exit( EXIT_FAILURE );
408	} // if
409
410	cfa_cpp_out = cfa_cpp_out.substr( 0, dot ) + ".ifa";
411	if ( creat( cfa_cpp_out.c_str(), 0666 ) == -1 ) {
412	perror( "CC1 Translator error: stage 2, creat" );
413	exit( EXIT_FAILURE );
414	} // if
415	} else {
416	tmpfilefd = mkstemps( tmpname, 4 );
417	if ( tmpfilefd == -1 ) {
418	perror( "CC1 Translator error: stage 2, mkstemp" );
419	exit( EXIT_FAILURE );
420	} // if
421	cfa_cpp_out = tmpname;
422	} // if
423	#ifdef __DEBUG_H__
424	cerr << "cfa_cpp_out: " << cfa_cpp_out << endl;
425	#endif // __DEBUG_H__
426	} // if
427
428	// If -CFA flag specified, run the cfa-cpp preprocessor on the temporary file, and output is written to standard
429	// output. Otherwise, run the cfa-cpp preprocessor on the temporary file and save the result into the output file.
430
431	if ( fork() == 0 ) { // child runs CFA
432	cargs[0] = ( *new string( bprefix + "cfa-cpp" ) ).c_str();
433	cargs[ncargs++] = cpp_in;
434
435	if ( CFA_flag ) { // run cfa-cpp ?
436	if ( o_file.size() != 0 ) { // location for output
437	cargs[ncargs++] = ( *new string( o_file.c_str() ) ).c_str();
438	} // if
439	} else {
440	cargs[ncargs++] = cfa_cpp_out.c_str();
441	} // if
442	cargs[ncargs] = nullptr; // terminate argument list
443
444	#ifdef __DEBUG_H__
445	for ( int i = 0; cargs[i] != nullptr; i += 1 ) {
446	cerr << cargs[i] << " ";
447	} // for
448	cerr << endl;
449	#endif // __DEBUG_H__
450
451	execvp( cargs[0], (char * const *)cargs ); // should not return
452	perror( "CC1 Translator error: stage 2 cfa-cpp, execvp" );
453	cerr << " invoked " << cargs[0] << endl;
454	exit( EXIT_FAILURE );
455	} // if
456
457	wait( &code ); // wait for child to finish
458
459	if ( WIFSIGNALED(code) ) { // child failed ?
460	rmtmpfile(); // remove tmpname
461	cerr << "CC1 Translator error: stage 2, child failed " << WTERMSIG(code) << endl;
462	exit( EXIT_FAILURE );
463	} // if
464
465	if ( CFA_flag ) { // no tmpfile created
466	exit( WEXITSTATUS( code ) ); // stop regardless of success or failure
467	} // if
468
469	#ifdef __DEBUG_H__
470	cerr << "return code from cfa-cpp:" << WEXITSTATUS(code) << endl;
471	#endif // __DEBUG_H__
472
473	if ( WEXITSTATUS(code) ) { // child error ?
474	rmtmpfile(); // remove tmpname
475	exit( WEXITSTATUS( code ) ); // do not continue
476	} // if
477
478	#ifdef __DEBUG_H__
479	cerr << "args:";
480	for ( int i = 1; i < nargs; i += 1 ) {
481	cerr << " " << args[i];
482	} // for
483	cerr << " " << cpp_in << endl;
484	#endif // __DEBUG_H__
485
486	if ( fork() == 0 ) { // child runs CFA
487	args[0] = compiler_path.c_str();
488	args[nargs++] = "-S"; // only compile and put assembler output in specified file
489	args[nargs++] = "-x";
490	args[nargs++] = "cpp-output";
491
492	args[nargs++] = cfa_cpp_out.c_str();
493	args[nargs] = nullptr; // terminate argument list
494
495	#ifdef __DEBUG_H__
496	cerr << "stage2 nargs: " << nargs << endl;
497	for ( int i = 0; args[i] != nullptr; i += 1 ) {
498	cerr << args[i] << " ";
499	} // for
500	cerr << endl;
501	#endif // __DEBUG_H__
502
503	execvp( args[0], (char * const *)args ); // should not return
504	perror( "CC1 Translator error: stage 2 cc1, execvp" );
505	cerr << " invoked " << cargs[0] << endl;
506	exit( EXIT_FAILURE ); // tell gcc not to go any further
507	} // if
508
509	wait( &code ); // wait for child to finish
510	rmtmpfile(); // remove tmpname
511
512	if ( WIFSIGNALED(code) ) { // child failed ?
513	cerr << "CC1 Translator error: stage 2, child failed " << WTERMSIG(code) << endl;
514	exit( EXIT_FAILURE );
515	} // if
516
517	#ifdef __DEBUG_H__
518	cerr << "return code from gcc cc1:" << WEXITSTATUS(code) << endl;
519	#endif // __DEBUG_H__
520
521	exit( WEXITSTATUS( code ) ); // stop regardless of success or failure
522	} // Stage2
523
524
525	// This program is called twice because of the -no-integrated-cpp. The calls are differentiated by the first
526	// command-line argument. The first call replaces the traditional cpp pass to preprocess the C program. The second call
527	// is to the compiler, which is broken into two steps: preprocess again with cfa-cpp and then call gcc to compile the
528	// doubly preprocessed program.
529
530	int main( const int argc, const char * const argv[], __attribute__((unused)) const char * const env[] ) {
531	#ifdef __DEBUG_H__
532	for ( int i = 0; env[i] != nullptr; i += 1 ) {
533	cerr << env[i] << endl;
534	} // for
535	#endif // __DEBUG_H__
536
537	signal( SIGINT, sigTermHandler );
538	signal( SIGTERM, sigTermHandler );
539
540	string arg( argv[1] );
541
542	// Currently, stage 1 starts with flag -E and stage 2 with flag -fpreprocessed.
543
544	if ( arg == "-E" ) {
545	Stage1( argc, argv );
546	} else if ( arg == "-fpreprocessed" ) {
547	Stage2( argc, argv );
548	} else {
549	cerr << "Usage: " << argv[0] << " input-file [output-file] [options]" << endl;
550	exit( EXIT_FAILURE );
551	} // if
552	} // main
553
554	// Local Variables: //
555	// tab-width: 4 //
556	// mode: c++ //
557	// compile-command: "make install" //
558	// End: //

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