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 #include "block.h" 28 #include "valprint.h" 29 #include "compile.h" 30 31 /* Helper for do_module_cleanup. */ 32 33 struct do_module_cleanup 34 { 35 /* Boolean to set true upon a call of do_module_cleanup. 36 The pointer may be NULL. */ 37 int *executedp; 38 39 /* .c file OBJFILE was built from. It needs to be xfree-d. */ 40 char *source_file; 41 42 /* Copy from struct compile_module. */ 43 enum compile_i_scope_types scope; 44 void *scope_data; 45 46 /* Copy from struct compile_module. */ 47 struct type *out_value_type; 48 CORE_ADDR out_value_addr; 49 50 /* Copy from struct compile_module. */ 51 struct munmap_list *munmap_list_head; 52 53 /* objfile_name of our objfile. */ 54 char objfile_name_string[1]; 55 }; 56 57 /* Cleanup everything after the inferior function dummy frame gets 58 discarded. */ 59 60 static dummy_frame_dtor_ftype do_module_cleanup; 61 static void 62 do_module_cleanup (void *arg, int registers_valid) 63 { 64 struct do_module_cleanup *data = arg; 65 struct objfile *objfile; 66 67 if (data->executedp != NULL) 68 { 69 *data->executedp = 1; 70 71 /* This code cannot be in compile_object_run as OUT_VALUE_TYPE 72 no longer exists there. */ 73 if (data->scope == COMPILE_I_PRINT_ADDRESS_SCOPE 74 || data->scope == COMPILE_I_PRINT_VALUE_SCOPE) 75 { 76 struct value *addr_value; 77 struct type *ptr_type = lookup_pointer_type (data->out_value_type); 78 79 addr_value = value_from_pointer (ptr_type, data->out_value_addr); 80 81 /* SCOPE_DATA would be stale unlesse EXECUTEDP != NULL. */ 82 compile_print_value (value_ind (addr_value), data->scope_data); 83 } 84 } 85 86 ALL_OBJFILES (objfile) 87 if ((objfile->flags & OBJF_USERLOADED) == 0 88 && (strcmp (objfile_name (objfile), data->objfile_name_string) == 0)) 89 { 90 free_objfile (objfile); 91 92 /* It may be a bit too pervasive in this dummy_frame dtor callback. */ 93 clear_symtab_users (0); 94 95 break; 96 } 97 98 /* Delete the .c file. */ 99 unlink (data->source_file); 100 xfree (data->source_file); 101 102 munmap_list_free (data->munmap_list_head); 103 104 /* Delete the .o file. */ 105 unlink (data->objfile_name_string); 106 xfree (data); 107 } 108 109 /* Perform inferior call of MODULE. This function may throw an error. 110 This function may leave files referenced by MODULE on disk until 111 the inferior call dummy frame is discarded. This function may throw errors. 112 Thrown errors and left MODULE files are unrelated events. Caller must no 113 longer touch MODULE's memory after this function has been called. */ 114 115 void 116 compile_object_run (struct compile_module *module) 117 { 118 struct value *func_val; 119 struct frame_id dummy_id; 120 struct cleanup *cleanups; 121 struct do_module_cleanup *data; 122 const char *objfile_name_s = objfile_name (module->objfile); 123 int dtor_found, executed = 0; 124 struct symbol *func_sym = module->func_sym; 125 CORE_ADDR regs_addr = module->regs_addr; 126 struct objfile *objfile = module->objfile; 127 128 data = xmalloc (sizeof (*data) + strlen (objfile_name_s)); 129 data->executedp = &executed; 130 data->source_file = xstrdup (module->source_file); 131 strcpy (data->objfile_name_string, objfile_name_s); 132 data->scope = module->scope; 133 data->scope_data = module->scope_data; 134 data->out_value_type = module->out_value_type; 135 data->out_value_addr = module->out_value_addr; 136 data->munmap_list_head = module->munmap_list_head; 137 138 xfree (module->source_file); 139 xfree (module); 140 module = NULL; 141 142 TRY 143 { 144 struct type *func_type = SYMBOL_TYPE (func_sym); 145 htab_t copied_types; 146 int current_arg = 0; 147 struct value **vargs; 148 149 /* OBJFILE may disappear while FUNC_TYPE still will be in use. */ 150 copied_types = create_copied_types_hash (objfile); 151 func_type = copy_type_recursive (objfile, func_type, copied_types); 152 htab_delete (copied_types); 153 154 gdb_assert (TYPE_CODE (func_type) == TYPE_CODE_FUNC); 155 func_val = value_from_pointer (lookup_pointer_type (func_type), 156 BLOCK_START (SYMBOL_BLOCK_VALUE (func_sym))); 157 158 vargs = alloca (sizeof (*vargs) * TYPE_NFIELDS (func_type)); 159 if (TYPE_NFIELDS (func_type) >= 1) 160 { 161 gdb_assert (regs_addr != 0); 162 vargs[current_arg] = value_from_pointer 163 (TYPE_FIELD_TYPE (func_type, current_arg), regs_addr); 164 ++current_arg; 165 } 166 if (TYPE_NFIELDS (func_type) >= 2) 167 { 168 gdb_assert (data->out_value_addr != 0); 169 vargs[current_arg] = value_from_pointer 170 (TYPE_FIELD_TYPE (func_type, current_arg), data->out_value_addr); 171 ++current_arg; 172 } 173 gdb_assert (current_arg == TYPE_NFIELDS (func_type)); 174 call_function_by_hand_dummy (func_val, TYPE_NFIELDS (func_type), vargs, 175 do_module_cleanup, data); 176 } 177 CATCH (ex, RETURN_MASK_ERROR) 178 { 179 /* In the case of DTOR_FOUND or in the case of EXECUTED nothing 180 needs to be done. */ 181 dtor_found = find_dummy_frame_dtor (do_module_cleanup, data); 182 if (!executed) 183 data->executedp = NULL; 184 gdb_assert (!(dtor_found && executed)); 185 if (!dtor_found && !executed) 186 do_module_cleanup (data, 0); 187 throw_exception (ex); 188 } 189 END_CATCH 190 191 dtor_found = find_dummy_frame_dtor (do_module_cleanup, data); 192 gdb_assert (!dtor_found && executed); 193 } 194