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   /* Copy from struct compile_module.  */
  40   enum compile_i_scope_types scope;
  41   void *scope_data;
  42
  43   /* objfile_name of our objfile.  */
  44   char objfile_name_string[1];
  45 };
  46
  47 /* Cleanup everything after the inferior function dummy frame gets
  48    discarded.  */
  49
  50 static dummy_frame_dtor_ftype do_module_cleanup;
  51 static void
  52 do_module_cleanup (void *arg, int registers_valid)
  53 {
  54   struct do_module_cleanup *data = arg;
  55   struct objfile *objfile;
  56
  57   if (data->executedp != NULL)
  58     *data->executedp = 1;
  59
  60   ALL_OBJFILES (objfile)
  61     if ((objfile->flags & OBJF_USERLOADED) == 0
  62         && (strcmp (objfile_name (objfile), data->objfile_name_string) == 0))
  63       {
  64         free_objfile (objfile);
  65
  66         /* It may be a bit too pervasive in this dummy_frame dtor callback.  */
  67         clear_symtab_users (0);
  68
  69         break;
  70       }
  71
  72   /* Delete the .c file.  */
  73   unlink (data->source_file);
  74   xfree (data->source_file);
  75
  76   /* Delete the .o file.  */
  77   unlink (data->objfile_name_string);
  78   xfree (data);
  79 }
  80
  81 /* Perform inferior call of MODULE.  This function may throw an error.
  82    This function may leave files referenced by MODULE on disk until
  83    the inferior call dummy frame is discarded.  This function may throw errors.
  84    Thrown errors and left MODULE files are unrelated events.  Caller must no
  85    longer touch MODULE's memory after this function has been called.  */
  86
  87 void
  88 compile_object_run (struct compile_module *module)
  89 {
  90   struct value *func_val;
  91   struct frame_id dummy_id;
  92   struct cleanup *cleanups;
  93   struct do_module_cleanup *data;
  94   const char *objfile_name_s = objfile_name (module->objfile);
  95   int dtor_found, executed = 0;
  96   CORE_ADDR func_addr = module->func_addr;
  97   CORE_ADDR regs_addr = module->regs_addr;
  98
  99   data = xmalloc (sizeof (*data) + strlen (objfile_name_s));
 100   data->executedp = &executed;
 101   data->source_file = xstrdup (module->source_file);
 102   strcpy (data->objfile_name_string, objfile_name_s);
 103   data->scope = module->scope;
 104   data->scope_data = module->scope_data;
 105
 106   xfree (module->source_file);
 107   xfree (module);
 108
 109   TRY
 110     {
 111       func_val = value_from_pointer
 112                  (builtin_type (target_gdbarch ())->builtin_func_ptr,
 113                   func_addr);
 114
 115       if (regs_addr == 0)
 116         call_function_by_hand_dummy (func_val, 0, NULL,
 117                                      do_module_cleanup, data);
 118       else
 119         {
 120           struct value *arg_val;
 121
 122           arg_val = value_from_pointer
 123                     (builtin_type (target_gdbarch ())->builtin_func_ptr,
 124                      regs_addr);
 125           call_function_by_hand_dummy (func_val, 1, &arg_val,
 126                                        do_module_cleanup, data);
 127         }
 128     }
 129   CATCH (ex, RETURN_MASK_ERROR)
 130     {
 131       /* In the case of DTOR_FOUND or in the case of EXECUTED nothing
 132          needs to be done.  */
 133       dtor_found = find_dummy_frame_dtor (do_module_cleanup, data);
 134       if (!executed)
 135         data->executedp = NULL;
 136       gdb_assert (!(dtor_found && executed));
 137       if (!dtor_found && !executed)
 138         do_module_cleanup (data, 0);
 139       throw_exception (ex);
 140     }
 141   END_CATCH
 142
 143   dtor_found = find_dummy_frame_dtor (do_module_cleanup, data);
 144   gdb_assert (!dtor_found && executed);
 145 }