1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
|
/* Call module for 'compile' command.
Copyright (C) 2014-2019 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "compile-object-run.h"
#include "value.h"
#include "infcall.h"
#include "objfiles.h"
#include "compile-internal.h"
#include "dummy-frame.h"
#include "block.h"
#include "valprint.h"
#include "compile.h"
/* Helper for do_module_cleanup. */
struct do_module_cleanup
{
/* Boolean to set true upon a call of do_module_cleanup.
The pointer may be NULL. */
int *executedp;
/* .c file OBJFILE was built from. It needs to be xfree-d. */
char *source_file;
/* Copy from struct compile_module. */
enum compile_i_scope_types scope;
void *scope_data;
/* Copy from struct compile_module. */
struct type *out_value_type;
CORE_ADDR out_value_addr;
/* Copy from struct compile_module. */
struct munmap_list *munmap_list_head;
/* objfile_name of our objfile. */
char objfile_name_string[1];
};
/* Cleanup everything after the inferior function dummy frame gets
discarded. */
static dummy_frame_dtor_ftype do_module_cleanup;
static void
do_module_cleanup (void *arg, int registers_valid)
{
struct do_module_cleanup *data = (struct do_module_cleanup *) arg;
if (data->executedp != NULL)
{
*data->executedp = 1;
/* This code cannot be in compile_object_run as OUT_VALUE_TYPE
no longer exists there. */
if (data->scope == COMPILE_I_PRINT_ADDRESS_SCOPE
|| data->scope == COMPILE_I_PRINT_VALUE_SCOPE)
{
struct value *addr_value;
struct type *ptr_type = lookup_pointer_type (data->out_value_type);
addr_value = value_from_pointer (ptr_type, data->out_value_addr);
/* SCOPE_DATA would be stale unlesse EXECUTEDP != NULL. */
compile_print_value (value_ind (addr_value), data->scope_data);
}
}
for (objfile *objfile : current_program_space->objfiles ())
if ((objfile->flags & OBJF_USERLOADED) == 0
&& (strcmp (objfile_name (objfile), data->objfile_name_string) == 0))
{
delete objfile;
/* It may be a bit too pervasive in this dummy_frame dtor callback. */
clear_symtab_users (0);
break;
}
/* Delete the .c file. */
unlink (data->source_file);
xfree (data->source_file);
delete data->munmap_list_head;
/* Delete the .o file. */
unlink (data->objfile_name_string);
xfree (data);
}
/* Perform inferior call of MODULE. This function may throw an error.
This function may leave files referenced by MODULE on disk until
the inferior call dummy frame is discarded. This function may throw errors.
Thrown errors and left MODULE files are unrelated events. Caller must no
longer touch MODULE's memory after this function has been called. */
void
compile_object_run (struct compile_module *module)
{
struct value *func_val;
struct do_module_cleanup *data;
const char *objfile_name_s = objfile_name (module->objfile);
int dtor_found, executed = 0;
struct symbol *func_sym = module->func_sym;
CORE_ADDR regs_addr = module->regs_addr;
struct objfile *objfile = module->objfile;
data = (struct do_module_cleanup *) xmalloc (sizeof (*data)
+ strlen (objfile_name_s));
data->executedp = &executed;
data->source_file = xstrdup (module->source_file);
strcpy (data->objfile_name_string, objfile_name_s);
data->scope = module->scope;
data->scope_data = module->scope_data;
data->out_value_type = module->out_value_type;
data->out_value_addr = module->out_value_addr;
data->munmap_list_head = module->munmap_list_head;
xfree (module->source_file);
xfree (module);
module = NULL;
try
{
struct type *func_type = SYMBOL_TYPE (func_sym);
htab_t copied_types;
int current_arg = 0;
struct value **vargs;
/* OBJFILE may disappear while FUNC_TYPE still will be in use. */
copied_types = create_copied_types_hash (objfile);
func_type = copy_type_recursive (objfile, func_type, copied_types);
htab_delete (copied_types);
gdb_assert (TYPE_CODE (func_type) == TYPE_CODE_FUNC);
func_val = value_from_pointer (lookup_pointer_type (func_type),
BLOCK_ENTRY_PC (SYMBOL_BLOCK_VALUE (func_sym)));
vargs = XALLOCAVEC (struct value *, TYPE_NFIELDS (func_type));
if (TYPE_NFIELDS (func_type) >= 1)
{
gdb_assert (regs_addr != 0);
vargs[current_arg] = value_from_pointer
(TYPE_FIELD_TYPE (func_type, current_arg), regs_addr);
++current_arg;
}
if (TYPE_NFIELDS (func_type) >= 2)
{
gdb_assert (data->out_value_addr != 0);
vargs[current_arg] = value_from_pointer
(TYPE_FIELD_TYPE (func_type, current_arg), data->out_value_addr);
++current_arg;
}
gdb_assert (current_arg == TYPE_NFIELDS (func_type));
auto args = gdb::make_array_view (vargs, TYPE_NFIELDS (func_type));
call_function_by_hand_dummy (func_val, NULL, args,
do_module_cleanup, data);
}
catch (const gdb_exception_error &ex)
{
/* In the case of DTOR_FOUND or in the case of EXECUTED nothing
needs to be done. */
dtor_found = find_dummy_frame_dtor (do_module_cleanup, data);
if (!executed)
data->executedp = NULL;
gdb_assert (!(dtor_found && executed));
if (!dtor_found && !executed)
do_module_cleanup (data, 0);
throw;
}
dtor_found = find_dummy_frame_dtor (do_module_cleanup, data);
gdb_assert (!dtor_found && executed);
}
|
