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   int saw_save_temps = 0;
 151
 152   /* This will be 0 if we encounter a situation where we should not
 153      link in libgcj.  */
 154   int library = 1;
 155
 156   /* This will be 1 if multiple input files (.class and/or .java)
 157      should be passed to a single jc1 invocation. */
 158   int combine_inputs = 0;
 159
 160   /* Number of .java and .class source file arguments seen. */
 161   int java_files_count = 0;
 162   int class_files_count = 0;
 163   /* Number of .zip or .jar file arguments seen. */
 164   int zip_files_count = 0;
 165   /* Number of '@FILES' arguments seen. */
 166   int indirect_files_count = 0;
 167
 168   /* Name of file containing list of files to compile. */
 169   char *filelist_filename = 0;
 170
 171   FILE *filelist_file = 0;
 172
 173   /* The number of arguments being added to what's in argv, other than
 174      libraries.  */
 175   int added = 2;
 176
 177   /* Used to track options that take arguments, so we don't go wrapping
 178      those with -xc++/-xnone.  */
 179   const char *quote = NULL;
 180
 181   /* The new argument list will be contained in this.  */
 182   const char **arglist;
 183
 184   /* Nonzero if we saw a `-xfoo' language specification on the
 185      command line.  Used to avoid adding our own -xc++ if the user
 186      already gave a language for the file.  */
 187   int saw_speclang = 0;
 188
 189   /* Saw --resource, -C or -o options, respectively. */
 190   int saw_resource = 0;
 191   int saw_C = 0;
 192   int saw_o = 0;
 193
 194   /* Saw some -O* or -g* option, respectively. */
 195   int saw_O = 0;
 196   int saw_g = 0;
 197
 198   /* Saw a `-D' option.  */
 199   int saw_D = 0;
 200
 201   /* An array used to flag each argument that needs a bit set for
 202      LANGSPEC, MATHLIB, WITHLIBC, or GCLIB.  */
 203   int *args;
 204
 205   /* The total number of arguments with the new stuff.  */
 206   int argc;
 207
 208   /* The argument list.  */
 209   const char *const *argv;
 210
 211   /* The number of libraries added in.  */
 212   int added_libraries;
 213
 214   /* The total number of arguments with the new stuff.  */
 215   int num_args = 1;
 216
 217   /* Nonzero if linking is supposed to happen.  */
 218   int will_link = 1;
 219
 220   /* Nonzero if we want to find the spec file.  */
 221   int want_spec_file = 1;
 222
 223   /* The argument we use to specify the spec file.  */
 224   char *spec_file = NULL;
 225
 226   /* If linking, nonzero if the BC-ABI is in use.  */
 227   int link_for_bc_abi = 0;
 228
 229   argc = *in_argc;
 230   argv = *in_argv;
 231   added_libraries = *in_added_libraries;
 232
 233   args = XCNEWVEC (int, argc);
 234
 235   for (i = 1; i < argc; i++)
 236     {
 237       /* If the previous option took an argument, we swallow it here.  */
 238       if (quote)
 239         {
 240           quote = NULL;
 241           args[i] |= PARAM_ARG;
 242           continue;
 243         }
 244
 245       /* We don't do this anymore, since we don't get them with minus
 246          signs on them.  */
 247       if (argv[i][0] == '\0' || argv[i][1] == '\0')
 248         continue;
 249
 250       if (argv[i][0] == '-')
 251         {
 252           if (library != 0 && (strcmp (argv[i], "-nostdlib") == 0
 253                                || strcmp (argv[i], "-nodefaultlibs") == 0))
 254             {
 255               library = 0;
 256             }
 257           else if (strncmp (argv[i], "-fmain=", 7) == 0)
 258             {
 259               main_class_name = argv[i] + 7;
 260               added--;
 261             }
 262           else if (strcmp (argv[i], "-fhelp") == 0)
 263             want_spec_file = 0;
 264           else if (strcmp (argv[i], "-v") == 0)
 265             {
 266               if (argc == 2)
 267                 {
 268                   /* If they only gave us `-v', don't try to link
 269                      in libgcj.  */
 270                   library = 0;
 271                 }
 272             }
 273           else if (strncmp (argv[i], "-x", 2) == 0)
 274             saw_speclang = 1;
 275           else if (strcmp (argv[i], "-C") == 0)
 276             {
 277               saw_C = 1;
 278               want_spec_file = 0;
 279               if (library != 0)
 280                 added -= 2;
 281               library = 0;
 282               will_link = 0;
 283             }
 284           else if (strncmp (argv[i], "-fcompile-resource=", 19) == 0)
 285             {
 286               saw_resource = 1;
 287               want_spec_file = 0;
 288               if (library != 0)
 289                 --added;
 290               library = 0;
 291               will_link = 0;
 292             }
 293           else if (argv[i][1] == 'D')
 294             saw_D = 1;
 295           else if (argv[i][1] == 'g')
 296             saw_g = 1;
 297           else if (argv[i][1] == 'O')
 298             saw_O = 1;
 299           else if ((argv[i][2] == '\0'
 300                     && strchr ("bBVDUoeTuIYmLiAI", argv[i][1]) != NULL)
 301                    || strcmp (argv[i], "-Tdata") == 0
 302                    || strcmp (argv[i], "-MT") == 0
 303                    || strcmp (argv[i], "-MF") == 0)
 304             {
 305               if (strcmp (argv[i], "-o") == 0)
 306                 saw_o = 1;
 307               quote = argv[i];
 308             }
 309           else if (strcmp (argv[i], "-classpath") == 0
 310                    || strcmp (argv[i], "-bootclasspath") == 0
 311                    || strcmp (argv[i], "-CLASSPATH") == 0
 312                    || strcmp (argv[i], "-encoding") == 0
 313                    || strcmp (argv[i], "-extdirs") == 0)
 314             {
 315               quote = argv[i];
 316               added -= 1;
 317             }
 318           else if (library != 0
 319                    && ((argv[i][2] == '\0'
 320                         && strchr ("cSEM", argv[i][1]) != NULL)
 321                        || strcmp (argv[i], "-MM") == 0))
 322             {
 323               /* Don't specify libraries if we won't link, since that would
 324                  cause a warning.  */
 325               library = 0;
 326               added -= 2;
 327
 328               /* Remember this so we can confirm -fmain option.  */
 329               will_link = 0;
 330             }
 331           else if (strcmp (argv[i], "-d") == 0)
 332             {
 333               /* `-d' option is for javac compatibility.  */
 334               quote = argv[i];
 335               added -= 1;
 336             }
 337           else if (strcmp (argv[i], "-fsyntax-only") == 0
 338                    || strcmp (argv[i], "--syntax-only") == 0)
 339             {
 340               library = 0;
 341               will_link = 0;
 342               continue;
 343             }
 344           else if (strcmp (argv[i], "-save-temps") == 0)
 345             saw_save_temps = 1;
 346           else if (strcmp (argv[i], "-static-libgcc") == 0
 347                    || strcmp (argv[i], "-static") == 0)
 348             shared_libgcc = 0;
 349           else if (strcmp (argv[i], "-findirect-dispatch") == 0
 350                    || strcmp (argv[i], "--indirect-dispatch") == 0)
 351             {
 352               link_for_bc_abi = 1;
 353             }
 354           else
 355             /* Pass other options through.  */
 356             continue;
 357         }
 358       else
 359         {
 360           int len;
 361
 362           if (saw_speclang)
 363             {
 364               saw_speclang = 0;
 365               continue;
 366             }
 367
 368           if (saw_resource)
 369             {
 370               args[i] |= RESOURCE_FILE_ARG;
 371               added += 2;  /* for -xjava and -xnone */
 372             }
 373
 374           if (argv[i][0] == '@')
 375             {
 376               args[i] |= INDIRECT_FILE_ARG;
 377               indirect_files_count++;
 378               added += 2;  /* for -xjava and -xnone */
 379             }
 380
 381           len = strlen (argv[i]);
 382           if (len > 5 && strcmp (argv[i] + len - 5, ".java") == 0)
 383             {
 384               args[i] |= JAVA_FILE_ARG;
 385               java_files_count++;
 386             }
 387           if (len > 6 && strcmp (argv[i] + len - 6, ".class") == 0)
 388             {
 389               args[i] |= CLASS_FILE_ARG;
 390               class_files_count++;
 391             }
 392           if (len > 4
 393               && (strcmp (argv[i] + len - 4, ".zip") == 0
 394                   || strcmp (argv[i] + len - 4, ".jar") == 0))
 395             {
 396               args[i] |= ZIP_FILE_ARG;
 397               zip_files_count++;
 398             }
 399         }
 400     }
 401
 402   if (quote)
 403     fatal ("argument to '%s' missing\n", quote);
 404
 405   if (saw_D && ! main_class_name)
 406     fatal ("can't specify '-D' without '--main'\n");
 407
 408   if (main_class_name && ! verify_class_name (main_class_name))
 409     fatal ("'%s' is not a valid class name", main_class_name);
 410
 411   num_args = argc + added;
 412   if (saw_resource)
 413     {
 414       if (! saw_o)
 415         fatal ("--resource requires -o");
 416     }
 417   if (saw_C)
 418     {
 419       num_args += 3;
 420       if (class_files_count + zip_files_count > 0)
 421         {
 422           error ("warning: already-compiled .class files ignored with -C");
 423           num_args -= class_files_count + zip_files_count;
 424           class_files_count = 0;
 425           zip_files_count = 0;
 426         }
 427       num_args += 2;  /* For -o NONE. */
 428       if (saw_o)
 429         fatal ("cannot specify both -C and -o");
 430     }
 431   if ((saw_o && java_files_count + class_files_count + zip_files_count > 1)
 432       || (saw_C && java_files_count > 1)
 433       || (indirect_files_count > 0
 434           && java_files_count + class_files_count + zip_files_count > 0))
 435     combine_inputs = 1;
 436
 437   if (combine_inputs)
 438     {
 439       filelist_filename = make_temp_file ("jx");
 440       if (filelist_filename == NULL)
 441         fatal ("cannot create temporary file");
 442       record_temp_file (filelist_filename, ! saw_save_temps, 0);
 443       filelist_file = fopen (filelist_filename, "w");
 444       if (filelist_file == NULL)
 445         pfatal_with_name (filelist_filename);
 446       num_args -= java_files_count + class_files_count + zip_files_count;
 447       num_args += 3;  /* for the combined arg "-xjava", and "-xnone" */
 448     }
 449
 450   if (main_class_name)
 451     {
 452       lang_specific_extra_outfiles++;
 453     }
 454   if (saw_g + saw_O == 0)
 455     num_args++;
 456   num_args++;
 457   /* An additional entry for the classpath.  */
 458   num_args++;
 459
 460   if (combine_inputs || indirect_files_count > 0)
 461     num_args += 1; /* for "-ffilelist-file" */
 462   if (combine_inputs && indirect_files_count > 0)
 463     fatal("using both @FILE with multiple files not implemented");
 464
 465   /* There's no point adding -shared-libgcc if we don't have a shared
 466      libgcc.  */
 467 #ifndef ENABLE_SHARED_LIBGCC
 468   shared_libgcc = 0;
 469 #endif
 470
 471   if (java_files_count > 0)
 472     ++num_args;
 473
 474   num_args += shared_libgcc;
 475
 476   num_args += link_for_bc_abi;
 477
 478   arglist = XNEWVEC (const char *, num_args + 1);
 479   j = 0;
 480
 481   arglist[j++] = argv[0];
 482
 483   if (combine_inputs || indirect_files_count > 0)
 484     arglist[j++] = "-ffilelist-file";
 485
 486   if (combine_inputs)
 487     {
 488       arglist[j++] = "-xjava";
 489       arglist[j++] = filelist_filename;
 490       arglist[j++] = "-xnone";
 491     }
 492
 493   if (java_files_count > 0)
 494     arglist[j++] = "-fsaw-java-file";
 495
 496   jcf_path_init ();
 497   for (i = 1; i < argc; i++, j++)
 498     {
 499       arglist[j] = argv[i];
 500
 501       if ((args[i] & PARAM_ARG))
 502         continue;
 503
 504       if ((args[i] & RESOURCE_FILE_ARG) != 0)
 505         {
 506           arglist[j++] = "-xjava";
 507           arglist[j++] = argv[i];
 508           arglist[j] = "-xnone";
 509         }
 510
 511       if (argv[i][0] == '-' && argv[i][1] == 'I')
 512         {
 513           const char *arg;
 514           if (argv[i][2] == '\0')
 515             {
 516               gcc_assert (i + 1 < argc && (args[i + 1] & PARAM_ARG) != 0);
 517               arg = argv[i + 1];
 518               /* Drop the argument.  */
 519               ++i;
 520             }
 521           else
 522             arg = &argv[i][2];
 523           jcf_path_include_arg (arg);
 524           --j;
 525           continue;
 526         }
 527       if (! strcmp (argv[i], "-classpath")
 528           || ! strcmp (argv[i], "-CLASSPATH"))
 529         {
 530           jcf_path_classpath_arg (argv[i + 1]);
 531           ++i;
 532           --j;
 533           continue;
 534         }
 535       if (! strcmp (argv[i], "-bootclasspath"))
 536         {
 537           jcf_path_bootclasspath_arg (argv[i + 1]);
 538           ++i;
 539           --j;
 540           continue;
 541         }
 542       if (! strncmp (argv[i], "-fCLASSPATH=", 12)
 543           || ! strncmp (argv[i], "-fclasspath=", 12))
 544         {
 545           const char *p = strchr (argv[i], '=');
 546           jcf_path_classpath_arg (p + 1);
 547           --j;
 548           continue;
 549         }
 550       if (! strncmp (argv[i], "-fbootclasspath=", 16))
 551         {
 552           const char *p = strchr (argv[i], '=');
 553           jcf_path_bootclasspath_arg (p + 1);
 554           --j;
 555           continue;
 556         }
 557       if (! strcmp (argv[i], "-extdirs"))
 558         {
 559           jcf_path_extdirs_arg (argv[i + 1]);
 560           ++i;
 561           --j;
 562           continue;
 563         }
 564
 565       if (strcmp (argv[i], "-encoding") == 0)
 566         {
 567           arglist[j] = concat ("-f", argv[i]+1, "=", argv[i+1], NULL);
 568           i++;
 569           continue;
 570         }
 571
 572       if (strcmp (argv[i], "-d") == 0)
 573         {
 574           arglist[j] = concat ("-foutput-class-dir=", argv[i + 1], NULL);
 575           ++i;
 576           continue;
 577         }
 578
 579       if (spec_file == NULL && strncmp (argv[i], "-L", 2) == 0)
 580         spec_file = find_spec_file (argv[i] + 2);
 581
 582       if (strncmp (argv[i], "-fmain=", 7) == 0)
 583         {
 584           if (! will_link)
 585             fatal ("cannot specify 'main' class when not linking");
 586           --j;
 587           continue;
 588         }
 589
 590       if ((args[i] & INDIRECT_FILE_ARG) != 0)
 591         {
 592           arglist[j++] = "-xjava";
 593           arglist[j++] = argv[i]+1;  /* Drop '@'. */
 594           arglist[j] = "-xnone";
 595         }
 596
 597       if ((args[i] & (CLASS_FILE_ARG|ZIP_FILE_ARG)) && saw_C)
 598         {
 599           --j;
 600           continue;
 601         }
 602
 603       if (combine_inputs
 604           && (args[i] & (CLASS_FILE_ARG|JAVA_FILE_ARG|ZIP_FILE_ARG)) != 0)
 605         {
 606           fputs (argv[i], filelist_file);
 607           fputc ('\n', filelist_file);
 608           --j;
 609           continue;
 610         }
 611   }
 612
 613   /* Handle classpath setting.  We specify the bootclasspath since
 614      that requires the fewest changes to our existing code...  */
 615   jcf_path_seal (0);
 616   arglist[j++] = jcf_path_compute ("-fbootclasspath=");
 617
 618   if (combine_inputs)
 619     {
 620       if (fclose (filelist_file))
 621         pfatal_with_name (filelist_filename);
 622     }
 623
 624   /* If we saw no -O or -g option, default to -g1, for javac compatibility. */
 625   if (saw_g + saw_O == 0)
 626     arglist[j++] = "-g1";
 627
 628   /* Read the specs file corresponding to libgcj.
 629      If we didn't find the spec file on the -L path, then we hope it
 630      is somewhere in the standard install areas.  */
 631   if (want_spec_file)
 632     arglist[j++] = spec_file == NULL ? "-specs=libgcj.spec" : spec_file;
 633
 634   if (saw_C)
 635     {
 636       arglist[j++] = "-fsyntax-only";
 637       arglist[j++] = "-femit-class-files";
 638       arglist[j++] = "-S";
 639       arglist[j++] = "-o";
 640       arglist[j++] = "NONE";
 641     }
 642
 643   if (shared_libgcc)
 644     arglist[j++] = "-shared-libgcc";
 645
 646   if (link_for_bc_abi)
 647     arglist[j++] = "-s-bc-abi";
 648
 649   arglist[j] = NULL;
 650
 651   *in_argc = j;
 652   *in_argv = arglist;
 653   *in_added_libraries = added_libraries;
 654 }
 655
 656 int
 657 lang_specific_pre_link (void)
 658 {
 659   int err;
 660   if (main_class_name == NULL)
 661     return 0;
 662   /* Append `main' to make the filename unique and allow
 663
 664         gcj --main=hello -save-temps hello.java
 665
 666      to work.  jvgenmain needs to strip this `main' to arrive at the correct
 667      class name.  Append dummy `.c' that can be stripped by set_input so %b
 668      is correct.  */
 669   set_input (concat (main_class_name, "main.c", NULL));
 670   err = do_spec (jvgenmain_spec);
 671   if (err == 0)
 672     {
 673       /* Shift the outfiles array so the generated main comes first.
 674          This is important when linking against (non-shared) libraries,
 675          since otherwise we risk (a) nothing getting linked or
 676          (b) 'main' getting picked up from a library. */
 677       int i = n_infiles;
 678       const char *generated = outfiles[i];
 679       while (--i >= 0)
 680         outfiles[i + 1] = outfiles[i];
 681       outfiles[0] = generated;
 682     }
 683   return err;
 684 }