gdb/compile/compile-object-run.c

   1 /* Call module for 'compile' command.
   2
   3    Copyright (C) 2014-2015 Free Software Foundation, Inc.
   4
   5    This file is part of GDB.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 #include "defs.h"
  21 #include "compile-object-run.h"
  22 #include "value.h"
  23 #include "infcall.h"
  24 #include "objfiles.h"
  25 #include "compile-internal.h"
  26 #include "dummy-frame.h"
  27
  28 /* Helper for do_module_cleanup.  */
  29
  30 struct do_module_cleanup
  31 {
  32   /* Boolean to set true upon a call of do_module_cleanup.
  33      The pointer may be NULL.  */
  34   int *executedp;
  35
  36   /* .c file OBJFILE was built from.  It needs to be xfree-d.  */
  37   char *source_file;
  38
  39   /* objfile_name of our objfile.  */
  40   char objfile_name_string[1];
  41 };
  42
  43 /* Cleanup everything after the inferior function dummy frame gets
  44    discarded.  */
  45
  46 static dummy_frame_dtor_ftype do_module_cleanup;
  47 static void
  48 do_module_cleanup (void *arg)
  49 {
  50   struct do_module_cleanup *data = arg;
  51   struct objfile *objfile;
  52
  53   if (data->executedp != NULL)
  54     *data->executedp = 1;
  55
  56   ALL_OBJFILES (objfile)
  57     if ((objfile->flags & OBJF_USERLOADED) == 0
  58         && (strcmp (objfile_name (objfile), data->objfile_name_string) == 0))
  59       {
  60         free_objfile (objfile);
  61
  62         /* It may be a bit too pervasive in this dummy_frame dtor callback.  */
  63         clear_symtab_users (0);
  64
  65         break;
  66       }
  67
  68   /* Delete the .c file.  */
  69   unlink (data->source_file);
  70   xfree (data->source_file);
  71
  72   /* Delete the .o file.  */
  73   unlink (data->objfile_name_string);
  74   xfree (data);
  75 }
  76
  77 /* Perform inferior call of MODULE.  This function may throw an error.
  78    This function may leave files referenced by MODULE on disk until
  79    the inferior call dummy frame is discarded.  This function may throw errors.
  80    Thrown errors and left MODULE files are unrelated events.  Caller must no
  81    longer touch MODULE's memory after this function has been called.  */
  82
  83 void
  84 compile_object_run (struct compile_module *module)
  85 {
  86   struct value *func_val;
  87   struct frame_id dummy_id;
  88   struct cleanup *cleanups;
  89   struct do_module_cleanup *data;
  90   const char *objfile_name_s = objfile_name (module->objfile);
  91   int dtor_found, executed = 0;
  92   CORE_ADDR func_addr = module->func_addr;
  93   CORE_ADDR regs_addr = module->regs_addr;
  94
  95   data = xmalloc (sizeof (*data) + strlen (objfile_name_s));
  96   data->executedp = &executed;
  97   data->source_file = xstrdup (module->source_file);
  98   strcpy (data->objfile_name_string, objfile_name_s);
  99
 100   xfree (module->source_file);
 101   xfree (module);
 102
 103   TRY
 104     {
 105       func_val = value_from_pointer
 106                  (builtin_type (target_gdbarch ())->builtin_func_ptr,
 107                   func_addr);
 108
 109       if (regs_addr == 0)
 110         call_function_by_hand_dummy (func_val, 0, NULL,
 111                                      do_module_cleanup, data);
 112       else
 113         {
 114           struct value *arg_val;
 115
 116           arg_val = value_from_pointer
 117                     (builtin_type (target_gdbarch ())->builtin_func_ptr,
 118                      regs_addr);
 119           call_function_by_hand_dummy (func_val, 1, &arg_val,
 120                                        do_module_cleanup, data);
 121         }
 122     }
 123   CATCH (ex, RETURN_MASK_ERROR)
 124     {
 125       /* In the case of DTOR_FOUND or in the case of EXECUTED nothing
 126          needs to be done.  */
 127       dtor_found = find_dummy_frame_dtor (do_module_cleanup, data);
 128       if (!executed)
 129         data->executedp = NULL;
 130       gdb_assert (!(dtor_found && executed));
 131       if (!dtor_found && !executed)
 132         do_module_cleanup (data);
 133       throw_exception (ex);
 134     }
 135   END_CATCH
 136
 137   dtor_found = find_dummy_frame_dtor (do_module_cleanup, data);
 138   gdb_assert (!dtor_found && executed);
 139 }