1 /* Call module for 'compile' command. 2 3 Copyright (C) 2014-2016 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 = (struct do_module_cleanup *) 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 = (struct do_module_cleanup *) xmalloc (sizeof (*data) 129 + strlen (objfile_name_s)); 130 data->executedp = &executed; 131 data->source_file = xstrdup (module->source_file); 132 strcpy (data->objfile_name_string, objfile_name_s); 133 data->scope = module->scope; 134 data->scope_data = module->scope_data; 135 data->out_value_type = module->out_value_type; 136 data->out_value_addr = module->out_value_addr; 137 data->munmap_list_head = module->munmap_list_head; 138 139 xfree (module->source_file); 140 xfree (module); 141 module = NULL; 142 143 TRY 144 { 145 struct type *func_type = SYMBOL_TYPE (func_sym); 146 htab_t copied_types; 147 int current_arg = 0; 148 struct value **vargs; 149 150 /* OBJFILE may disappear while FUNC_TYPE still will be in use. */ 151 copied_types = create_copied_types_hash (objfile); 152 func_type = copy_type_recursive (objfile, func_type, copied_types); 153 htab_delete (copied_types); 154 155 gdb_assert (TYPE_CODE (func_type) == TYPE_CODE_FUNC); 156 func_val = value_from_pointer (lookup_pointer_type (func_type), 157 BLOCK_START (SYMBOL_BLOCK_VALUE (func_sym))); 158 159 vargs = XALLOCAVEC (struct value *, TYPE_NFIELDS (func_type)); 160 if (TYPE_NFIELDS (func_type) >= 1) 161 { 162 gdb_assert (regs_addr != 0); 163 vargs[current_arg] = value_from_pointer 164 (TYPE_FIELD_TYPE (func_type, current_arg), regs_addr); 165 ++current_arg; 166 } 167 if (TYPE_NFIELDS (func_type) >= 2) 168 { 169 gdb_assert (data->out_value_addr != 0); 170 vargs[current_arg] = value_from_pointer 171 (TYPE_FIELD_TYPE (func_type, current_arg), data->out_value_addr); 172 ++current_arg; 173 } 174 gdb_assert (current_arg == TYPE_NFIELDS (func_type)); 175 call_function_by_hand_dummy (func_val, TYPE_NFIELDS (func_type), vargs, 176 do_module_cleanup, data); 177 } 178 CATCH (ex, RETURN_MASK_ERROR) 179 { 180 /* In the case of DTOR_FOUND or in the case of EXECUTED nothing 181 needs to be done. */ 182 dtor_found = find_dummy_frame_dtor (do_module_cleanup, data); 183 if (!executed) 184 data->executedp = NULL; 185 gdb_assert (!(dtor_found && executed)); 186 if (!dtor_found && !executed) 187 do_module_cleanup (data, 0); 188 throw_exception (ex); 189 } 190 END_CATCH 191 192 dtor_found = find_dummy_frame_dtor (do_module_cleanup, data); 193 gdb_assert (!dtor_found && executed); 194 } 195