gcc/java/jvspec.c

   1 /* Specific flags and argument handling of the front-end of the
   2    GNU compiler for the Java(TM) language.
   3    Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
   4    2005, 2006, 2007 Free Software Foundation, Inc.
   5
   6 This file is part of GCC.
   7
   8 GCC is free software; you can redistribute it and/or modify
   9 it under the terms of the GNU General Public License as published by
  10 the Free Software Foundation; either version 3, or (at your option)
  11 any later version.
  12
  13 GCC is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU General Public License for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with GCC; see the file COPYING3.  If not see
  20 <http://www.gnu.org/licenses/>.
  21
  22 Java and all Java-based marks are trademarks or registered trademarks
  23 of Sun Microsystems, Inc. in the United States and other countries.
  24 The Free Software Foundation is independent of Sun Microsystems, Inc.  */
  25
  26 #include "config.h"
  27 #include "system.h"
  28 #include "coretypes.h"
  29 #include "tm.h"
  30 #include "gcc.h"
  31 #include "jcf.h"
  32
  33 /* Name of spec file.  */
  34 #define SPEC_FILE "libgcj.spec"
  35
  36 /* This bit is set if we saw a `-xfoo' language specification.  */
  37 #define LANGSPEC        (1<<1)
  38 /* True if this arg is a parameter to the previous option-taking arg. */
  39 #define PARAM_ARG       (1<<2)
  40 /* True if this arg is a .java input file name. */
  41 #define JAVA_FILE_ARG   (1<<3)
  42 /* True if this arg is a .class input file name. */
  43 #define CLASS_FILE_ARG  (1<<4)
  44 /* True if this arg is a .zip or .jar input file name. */
  45 #define ZIP_FILE_ARG    (1<<5)
  46 /* True if this arg is @FILE - where FILE contains a list of filenames. */
  47 #define INDIRECT_FILE_ARG (1<<6)
  48 /* True if this arg is a resource file.  */
  49 #define RESOURCE_FILE_ARG (1<<7)
  50
  51 static char *find_spec_file (const char *);
  52 static int verify_class_name (const char *);
  53
  54 static const char *main_class_name = NULL;
  55 int lang_specific_extra_outfiles = 0;
  56
  57 /* True if we should add -shared-libgcc to the command-line.  */
  58 int shared_libgcc = 1;
  59
  60 static const char jvgenmain_spec[] =
  61   "jvgenmain %{findirect-dispatch} %{D*} %b %m.i |\n\
  62    cc1 %m.i %1 \
  63                    %{!Q:-quiet} -dumpbase %b.c %{d*} %{m*} %{a*}\
  64                    %{g*} %{O*} \
  65                    %{v:-version} %{pg:-p} %{p}\
  66                    %<fbounds-check %<fno-bounds-check\
  67                    %<fassume-compiled* %<fno-assume-compiled*\
  68                    %<fcompile-resource* %<fassert %<fno-assert \
  69                    %<femit-class-file %<femit-class-files %<fencoding*\
  70                    %<fuse-boehm-gc %<fhash-synchronization %<fjni\
  71                    %<findirect-dispatch %<fnew-verifier\
  72                    %<fno-store-check %<foutput-class-dir\
  73                    %<fclasspath* %<fCLASSPATH* %<fbootclasspath*\
  74                    %<fextdirs*\
  75                    %<fuse-divide-subroutine %<fno-use-divide-subroutine\
  76                    %<fuse-atomic-builtins %<fno-use-atomic-builtins\
  77                    %<fcheck-references %<fno-check-references\
  78                    %<ffilelist-file %<fsaw-java-file %<fsource* %<ftarget*\
  79                    %{f*} -fdollars-in-identifiers\
  80                    %{aux-info*}\
  81                    %{pg:%{fomit-frame-pointer:%e-pg and -fomit-frame-pointer are incompatible}}\
  82                    %{S:%W{o*}%{!o*:-o %b.s}}\
  83    %(invoke_as)";
  84
  85 /* Return full path name of spec file if it is in DIR, or NULL if
  86    not.  */
  87 static char *
  88 find_spec_file (const char *dir)
  89 {
  90   char *spec;
  91   int x;
  92   struct stat sb;
  93
  94   spec = XNEWVEC (char, strlen (dir) + sizeof (SPEC_FILE)
  95                   + sizeof ("-specs=") + 4);
  96   strcpy (spec, "-specs=");
  97   x = strlen (spec);
  98   strcat (spec, dir);
  99   strcat (spec, "/");
 100   strcat (spec, SPEC_FILE);
 101   if (! stat (spec + x, &sb))
 102     return spec;
 103   free (spec);
 104   return NULL;
 105 }
 106
 107 #define JAVA_START_CHAR_P(c) (c < 128 && (ISIDST (c) || c == '$'))
 108 #define JAVA_PART_CHAR_P(c) (c < 128                                          \
 109                              && (ISIDNUM (c)                                  \
 110                                  || c == '$'                                  \
 111                                  || (c >= 0x00 && c <= 0x08)                  \
 112                                  || (c >= 0x0e && c <= 0x1b)                  \
 113                                  || c == 0x7f))
 114
 115 /* Verify that NAME is a valid Java class name that might contain
 116    `main'.  Return 0 on failure.  */
 117 static int
 118 verify_class_name (const char *name)
 119 {
 120   /* FIXME: what encoding do we use for command-line arguments?  For
 121      now we assume plain ASCII, which of course is wrong.  */
 122   while (*name)
 123     {
 124       int ch = *name++;
 125       if (ch < 0 || ! JAVA_START_CHAR_P (ch))
 126         return 0;
 127       while (*name)
 128         {
 129           ch = *name++;
 130           if (ch < 0)
 131             return 0;
 132           /* We found a break between class names.  Next character
 133              must be an identifier start again.  */
 134           if (ch == '.')
 135             break;
 136           if (! JAVA_PART_CHAR_P (ch))
 137             return 0;
 138         }
 139     }
 140
 141   return 1;
 142 }
 143
 144 void
 145 lang_specific_driver (int *in_argc, const char *const **in_argv,
 146                       int *in_added_libraries)
 147 {
 148   int i, j;
 149
 150   /* If nonzero, the user gave us the `-v' flag.  */
 151   int saw_verbose_flag = 0;
 152
 153   int saw_save_temps = 0;
 154
 155   /* This will be 0 if we encounter a situation where we should not
 156      link in libgcj.  */
 157   int library = 1;
 158
 159   /* This will be 1 if multiple input files (.class and/or .java)
 160      should be passed to a single jc1 invocation. */
 161   int combine_inputs = 0;
 162
 163   /* Number of .java and .class source file arguments seen. */
 164   int java_files_count = 0;
 165   int class_files_count = 0;
 166   /* Number of .zip or .jar file arguments seen. */
 167   int zip_files_count = 0;
 168   /* Number of '@FILES' arguments seen. */
 169   int indirect_files_count = 0;
 170
 171   /* Name of file containing list of files to compile. */
 172   char *filelist_filename = 0;
 173
 174   FILE *filelist_file = 0;
 175
 176   /* The number of arguments being added to what's in argv, other than
 177      libraries.  */
 178   int added = 2;
 179
 180   /* Used to track options that take arguments, so we don't go wrapping
 181      those with -xc++/-xnone.  */
 182   const char *quote = NULL;
 183
 184   /* The new argument list will be contained in this.  */
 185   const char **arglist;
 186
 187   /* Nonzero if we saw a `-xfoo' language specification on the
 188      command line.  Used to avoid adding our own -xc++ if the user
 189      already gave a language for the file.  */
 190   int saw_speclang = 0;
 191
 192   /* Saw --resource, -C or -o options, respectively. */
 193   int saw_resource = 0;
 194   int saw_C = 0;
 195   int saw_o = 0;
 196
 197   /* Saw some -O* or -g* option, respectively. */
 198   int saw_O = 0;
 199   int saw_g = 0;
 200
 201   /* Saw a `-D' option.  */
 202   int saw_D = 0;
 203
 204   /* An array used to flag each argument that needs a bit set for
 205      LANGSPEC, MATHLIB, WITHLIBC, or GCLIB.  */
 206   int *args;
 207
 208   /* The total number of arguments with the new stuff.  */
 209   int argc;
 210
 211   /* The argument list.  */
 212   const char *const *argv;
 213
 214   /* The number of libraries added in.  */
 215   int added_libraries;
 216
 217   /* The total number of arguments with the new stuff.  */
 218   int num_args = 1;
 219
 220   /* Nonzero if linking is supposed to happen.  */
 221   int will_link = 1;
 222
 223   /* Nonzero if we want to find the spec file.  */
 224   int want_spec_file = 1;
 225
 226   /* The argument we use to specify the spec file.  */
 227   char *spec_file = NULL;
 228
 229   /* If linking, nonzero if the BC-ABI is in use.  */
 230   int link_for_bc_abi = 0;
 231
 232   argc = *in_argc;
 233   argv = *in_argv;
 234   added_libraries = *in_added_libraries;
 235
 236   args = XCNEWVEC (int, argc);
 237
 238   for (i = 1; i < argc; i++)
 239     {
 240       /* If the previous option took an argument, we swallow it here.  */
 241       if (quote)
 242         {
 243           quote = NULL;
 244           args[i] |= PARAM_ARG;
 245           continue;
 246         }
 247
 248       /* We don't do this anymore, since we don't get them with minus
 249          signs on them.  */
 250       if (argv[i][0] == '\0' || argv[i][1] == '\0')
 251         continue;
 252
 253       if (argv[i][0] == '-')
 254         {
 255           if (library != 0 && (strcmp (argv[i], "-nostdlib") == 0
 256                                || strcmp (argv[i], "-nodefaultlibs") == 0))
 257             {
 258               library = 0;
 259             }
 260           else if (strncmp (argv[i], "-fmain=", 7) == 0)
 261             {
 262               main_class_name = argv[i] + 7;
 263               added--;
 264             }
 265           else if (strcmp (argv[i], "-fhelp") == 0)
 266             want_spec_file = 0;
 267           else if (strcmp (argv[i], "-v") == 0)
 268             {
 269               saw_verbose_flag = 1;
 270               if (argc == 2)
 271                 {
 272                   /* If they only gave us `-v', don't try to link
 273                      in libgcj.  */
 274                   library = 0;
 275                 }
 276             }
 277           else if (strncmp (argv[i], "-x", 2) == 0)
 278             saw_speclang = 1;
 279           else if (strcmp (argv[i], "-C") == 0)
 280             {
 281               saw_C = 1;
 282               want_spec_file = 0;
 283               if (library != 0)
 284                 added -= 2;
 285               library = 0;
 286               will_link = 0;
 287             }
 288           else if (strncmp (argv[i], "-fcompile-resource=", 19) == 0)
 289             {
 290               saw_resource = 1;
 291               want_spec_file = 0;
 292               if (library != 0)
 293                 --added;
 294               library = 0;
 295               will_link = 0;
 296             }
 297           else if (argv[i][1] == 'D')
 298             saw_D = 1;
 299           else if (argv[i][1] == 'g')
 300             saw_g = 1;
 301           else if (argv[i][1] == 'O')
 302             saw_O = 1;
 303           else if ((argv[i][2] == '\0'
 304                     && strchr ("bBVDUoeTuIYmLiAI", argv[i][1]) != NULL)
 305                    || strcmp (argv[i], "-Tdata") == 0
 306                    || strcmp (argv[i], "-MT") == 0
 307                    || strcmp (argv[i], "-MF") == 0)
 308             {
 309               if (strcmp (argv[i], "-o") == 0)
 310                 saw_o = 1;
 311               quote = argv[i];
 312             }
 313           else if (strcmp (argv[i], "-classpath") == 0
 314                    || strcmp (argv[i], "-bootclasspath") == 0
 315                    || strcmp (argv[i], "-CLASSPATH") == 0
 316                    || strcmp (argv[i], "-encoding") == 0
 317                    || strcmp (argv[i], "-extdirs") == 0)
 318             {
 319               quote = argv[i];
 320               added -= 1;
 321             }
 322           else if (library != 0
 323                    && ((argv[i][2] == '\0'
 324                         && strchr ("cSEM", argv[i][1]) != NULL)
 325                        || strcmp (argv[i], "-MM") == 0))
 326             {
 327               /* Don't specify libraries if we won't link, since that would
 328                  cause a warning.  */
 329               library = 0;
 330               added -= 2;
 331
 332               /* Remember this so we can confirm -fmain option.  */
 333               will_link = 0;
 334             }
 335           else if (strcmp (argv[i], "-d") == 0)
 336             {
 337               /* `-d' option is for javac compatibility.  */
 338               quote = argv[i];
 339               added -= 1;
 340             }
 341           else if (strcmp (argv[i], "-fsyntax-only") == 0
 342                    || strcmp (argv[i], "--syntax-only") == 0)
 343             {
 344               library = 0;
 345               will_link = 0;
 346               continue;
 347             }
 348           else if (strcmp (argv[i], "-save-temps") == 0)
 349             saw_save_temps = 1;
 350           else if (strcmp (argv[i], "-static-libgcc") == 0
 351                    || strcmp (argv[i], "-static") == 0)
 352             shared_libgcc = 0;
 353           else if (strcmp (argv[i], "-findirect-dispatch") == 0
 354                    || strcmp (argv[i], "--indirect-dispatch") == 0)
 355             {
 356               link_for_bc_abi = 1;
 357             }
 358           else
 359             /* Pass other options through.  */
 360             continue;
 361         }
 362       else
 363         {
 364           int len;
 365
 366           if (saw_speclang)
 367             {
 368               saw_speclang = 0;
 369               continue;
 370             }
 371
 372           if (saw_resource)
 373             {
 374               args[i] |= RESOURCE_FILE_ARG;
 375               added += 2;  /* for -xjava and -xnone */
 376             }
 377
 378           if (argv[i][0] == '@')
 379             {
 380               args[i] |= INDIRECT_FILE_ARG;
 381               indirect_files_count++;
 382               added += 2;  /* for -xjava and -xnone */
 383             }
 384
 385           len = strlen (argv[i]);
 386           if (len > 5 && strcmp (argv[i] + len - 5, ".java") == 0)
 387             {
 388               args[i] |= JAVA_FILE_ARG;
 389               java_files_count++;
 390             }
 391           if (len > 6 && strcmp (argv[i] + len - 6, ".class") == 0)
 392             {
 393               args[i] |= CLASS_FILE_ARG;
 394               class_files_count++;
 395             }
 396           if (len > 4
 397               && (strcmp (argv[i] + len - 4, ".zip") == 0
 398                   || strcmp (argv[i] + len - 4, ".jar") == 0))
 399             {
 400               args[i] |= ZIP_FILE_ARG;
 401               zip_files_count++;
 402             }
 403         }
 404     }
 405
 406   if (quote)
 407     fatal ("argument to '%s' missing\n", quote);
 408
 409   if (saw_D && ! main_class_name)
 410     fatal ("can't specify '-D' without '--main'\n");
 411
 412   if (main_class_name && ! verify_class_name (main_class_name))
 413     fatal ("'%s' is not a valid class name", main_class_name);
 414
 415   num_args = argc + added;
 416   if (saw_resource)
 417     {
 418       if (! saw_o)
 419         fatal ("--resource requires -o");
 420     }
 421   if (saw_C)
 422     {
 423       num_args += 3;
 424       if (class_files_count + zip_files_count > 0)
 425         {
 426           error ("warning: already-compiled .class files ignored with -C");
 427           num_args -= class_files_count + zip_files_count;
 428           class_files_count = 0;
 429           zip_files_count = 0;
 430         }
 431       num_args += 2;  /* For -o NONE. */
 432       if (saw_o)
 433         fatal ("cannot specify both -C and -o");
 434     }
 435   if ((saw_o && java_files_count + class_files_count + zip_files_count > 1)
 436       || (saw_C && java_files_count > 1)
 437       || (indirect_files_count > 0
 438           && java_files_count + class_files_count + zip_files_count > 0))
 439     combine_inputs = 1;
 440
 441   if (combine_inputs)
 442     {
 443       filelist_filename = make_temp_file ("jx");
 444       if (filelist_filename == NULL)
 445         fatal ("cannot create temporary file");
 446       record_temp_file (filelist_filename, ! saw_save_temps, 0);
 447       filelist_file = fopen (filelist_filename, "w");
 448       if (filelist_file == NULL)
 449         pfatal_with_name (filelist_filename);
 450       num_args -= java_files_count + class_files_count + zip_files_count;
 451       num_args += 3;  /* for the combined arg "-xjava", and "-xnone" */
 452     }
 453
 454   if (main_class_name)
 455     {
 456       lang_specific_extra_outfiles++;
 457     }
 458   if (saw_g + saw_O == 0)
 459     num_args++;
 460   num_args++;
 461   /* An additional entry for the classpath.  */
 462   num_args++;
 463
 464   if (combine_inputs || indirect_files_count > 0)
 465     num_args += 1; /* for "-ffilelist-file" */
 466   if (combine_inputs && indirect_files_count > 0)
 467     fatal("using both @FILE with multiple files not implemented");
 468
 469   /* There's no point adding -shared-libgcc if we don't have a shared
 470      libgcc.  */
 471 #ifndef ENABLE_SHARED_LIBGCC
 472   shared_libgcc = 0;
 473 #endif
 474
 475   if (java_files_count > 0)
 476     ++num_args;
 477
 478   num_args += shared_libgcc;
 479
 480   num_args += link_for_bc_abi;
 481
 482   arglist = XNEWVEC (const char *, num_args + 1);
 483   j = 0;
 484
 485   arglist[j++] = argv[0];
 486
 487   if (combine_inputs || indirect_files_count > 0)
 488     arglist[j++] = "-ffilelist-file";
 489
 490   if (combine_inputs)
 491     {
 492       arglist[j++] = "-xjava";
 493       arglist[j++] = filelist_filename;
 494       arglist[j++] = "-xnone";
 495     }
 496
 497   if (java_files_count > 0)
 498     arglist[j++] = "-fsaw-java-file";
 499
 500   jcf_path_init ();
 501   for (i = 1; i < argc; i++, j++)
 502     {
 503       arglist[j] = argv[i];
 504
 505       if ((args[i] & PARAM_ARG))
 506         continue;
 507
 508       if ((args[i] & RESOURCE_FILE_ARG) != 0)
 509         {
 510           arglist[j++] = "-xjava";
 511           arglist[j++] = argv[i];
 512           arglist[j] = "-xnone";
 513         }
 514
 515       if (argv[i][0] == '-' && argv[i][1] == 'I')
 516         {
 517           const char *arg;
 518           if (argv[i][2] == '\0')
 519             {
 520               gcc_assert (i + 1 < argc && (args[i + 1] & PARAM_ARG) != 0);
 521               arg = argv[i + 1];
 522               /* Drop the argument.  */
 523               ++i;
 524             }
 525           else
 526             arg = &argv[i][2];
 527           jcf_path_include_arg (arg);
 528           --j;
 529           continue;
 530         }
 531       if (! strcmp (argv[i], "-classpath")
 532           || ! strcmp (argv[i], "-CLASSPATH"))
 533         {
 534           jcf_path_classpath_arg (argv[i + 1]);
 535           ++i;
 536           --j;
 537           continue;
 538         }
 539       if (! strcmp (argv[i], "-bootclasspath"))
 540         {
 541           jcf_path_bootclasspath_arg (argv[i + 1]);
 542           ++i;
 543           --j;
 544           continue;
 545         }
 546       if (! strncmp (argv[i], "-fCLASSPATH=", 12)
 547           || ! strncmp (argv[i], "-fclasspath=", 12))
 548         {
 549           char *p = strchr (argv[i], '=');
 550           jcf_path_classpath_arg (p + 1);
 551           --j;
 552           continue;
 553         }
 554       if (! strncmp (argv[i], "-fbootclasspath=", 16))
 555         {
 556           char *p = strchr (argv[i], '=');
 557           jcf_path_bootclasspath_arg (p + 1);
 558           --j;
 559           continue;
 560         }
 561       if (! strcmp (argv[i], "-extdirs"))
 562         {
 563           jcf_path_extdirs_arg (argv[i + 1]);
 564           ++i;
 565           --j;
 566           continue;
 567         }
 568
 569       if (strcmp (argv[i], "-encoding") == 0)
 570         {
 571           arglist[j] = concat ("-f", argv[i]+1, "=", argv[i+1], NULL);
 572           i++;
 573           continue;
 574         }
 575
 576       if (strcmp (argv[i], "-d") == 0)
 577         {
 578           arglist[j] = concat ("-foutput-class-dir=", argv[i + 1], NULL);
 579           ++i;
 580           continue;
 581         }
 582
 583       if (spec_file == NULL && strncmp (argv[i], "-L", 2) == 0)
 584         spec_file = find_spec_file (argv[i] + 2);
 585
 586       if (strncmp (argv[i], "-fmain=", 7) == 0)
 587         {
 588           if (! will_link)
 589             fatal ("cannot specify 'main' class when not linking");
 590           --j;
 591           continue;
 592         }
 593
 594       if ((args[i] & INDIRECT_FILE_ARG) != 0)
 595         {
 596           arglist[j++] = "-xjava";
 597           arglist[j++] = argv[i]+1;  /* Drop '@'. */
 598           arglist[j] = "-xnone";
 599         }
 600
 601       if ((args[i] & (CLASS_FILE_ARG|ZIP_FILE_ARG)) && saw_C)
 602         {
 603           --j;
 604           continue;
 605         }
 606
 607       if (combine_inputs
 608           && (args[i] & (CLASS_FILE_ARG|JAVA_FILE_ARG|ZIP_FILE_ARG)) != 0)
 609         {
 610           fputs (argv[i], filelist_file);
 611           fputc ('\n', filelist_file);
 612           --j;
 613           continue;
 614         }
 615   }
 616
 617   /* Handle classpath setting.  We specify the bootclasspath since
 618      that requires the fewest changes to our existing code...  */
 619   jcf_path_seal (0);
 620   arglist[j++] = jcf_path_compute ("-fbootclasspath=");
 621
 622   if (combine_inputs)
 623     {
 624       if (fclose (filelist_file))
 625         pfatal_with_name (filelist_filename);
 626     }
 627
 628   /* If we saw no -O or -g option, default to -g1, for javac compatibility. */
 629   if (saw_g + saw_O == 0)
 630     arglist[j++] = "-g1";
 631
 632   /* Read the specs file corresponding to libgcj.
 633      If we didn't find the spec file on the -L path, then we hope it
 634      is somewhere in the standard install areas.  */
 635   if (want_spec_file)
 636     arglist[j++] = spec_file == NULL ? "-specs=libgcj.spec" : spec_file;
 637
 638   if (saw_C)
 639     {
 640       arglist[j++] = "-fsyntax-only";
 641       arglist[j++] = "-femit-class-files";
 642       arglist[j++] = "-S";
 643       arglist[j++] = "-o";
 644       arglist[j++] = "NONE";
 645     }
 646
 647   if (shared_libgcc)
 648     arglist[j++] = "-shared-libgcc";
 649
 650   if (link_for_bc_abi)
 651     arglist[j++] = "-s-bc-abi";
 652
 653   arglist[j] = NULL;
 654
 655   *in_argc = j;
 656   *in_argv = arglist;
 657   *in_added_libraries = added_libraries;
 658 }
 659
 660 int
 661 lang_specific_pre_link (void)
 662 {
 663   int err;
 664   if (main_class_name == NULL)
 665     return 0;
 666   /* Append `main' to make the filename unique and allow
 667
 668         gcj --main=hello -save-temps hello.java
 669
 670      to work.  jvgenmain needs to strip this `main' to arrive at the correct
 671      class name.  Append dummy `.c' that can be stripped by set_input so %b
 672      is correct.  */
 673   set_input (concat (main_class_name, "main.c", NULL));
 674   err = do_spec (jvgenmain_spec);
 675   if (err == 0)
 676     {
 677       /* Shift the outfiles array so the generated main comes first.
 678          This is important when linking against (non-shared) libraries,
 679          since otherwise we risk (a) nothing getting linked or
 680          (b) 'main' getting picked up from a library. */
 681       int i = n_infiles;
 682       const char *generated = outfiles[i];
 683       while (--i >= 0)
 684         outfiles[i + 1] = outfiles[i];
 685       outfiles[0] = generated;
 686     }
 687   return err;
 688 }