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dll.c
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1 /* Copyright (C) 2002-2015 Free Software Foundation, Inc.
2 
3  This file is part of GDB.
4 
5  This program is free software; you can redistribute it and/or modify
6  it under the terms of the GNU General Public License as published by
7  the Free Software Foundation; either version 3 of the License, or
8  (at your option) any later version.
9 
10  This program is distributed in the hope that it will be useful,
11  but WITHOUT ANY WARRANTY; without even the implied warranty of
12  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13  GNU General Public License for more details.
14 
15  You should have received a copy of the GNU General Public License
16  along with this program. If not, see <http://www.gnu.org/licenses/>. */
17 
18 #include "server.h"
19 #include "dll.h"
20 
21 #define get_dll(inf) ((struct dll_info *)(inf))
22 
23 /* An "unspecified" CORE_ADDR, for match_dll. */
24 #define UNSPECIFIED_CORE_ADDR (~(CORE_ADDR) 0)
25 
28 
29 static void
31 {
32  struct dll_info *dll = get_dll (inf);
33  if (dll->name != NULL)
34  free (dll->name);
35  free (dll);
36 }
37 
38 /* Find a DLL with the same name and/or base address. A NULL name in
39  the key is ignored; so is an all-ones base address. */
40 
41 static int
42 match_dll (struct inferior_list_entry *inf, void *arg)
43 {
44  struct dll_info *iter = (void *) inf;
45  struct dll_info *key = arg;
46 
48  && iter->base_addr == key->base_addr)
49  return 1;
50  else if (key->name != NULL
51  && iter->name != NULL
52  && strcmp (key->name, iter->name) == 0)
53  return 1;
54 
55  return 0;
56 }
57 
58 /* Record a newly loaded DLL at BASE_ADDR. */
59 
60 void
62 {
63  struct dll_info *new_dll = xmalloc (sizeof (*new_dll));
64  memset (new_dll, 0, sizeof (*new_dll));
65 
66  new_dll->entry.id = minus_one_ptid;
67 
68  new_dll->name = xstrdup (name);
69  new_dll->base_addr = base_addr;
70 
71  add_inferior_to_list (&all_dlls, &new_dll->entry);
72  dlls_changed = 1;
73 }
74 
75 /* Record that the DLL with NAME and BASE_ADDR has been unloaded. */
76 
77 void
79 {
80  struct dll_info *dll;
81  struct dll_info key_dll;
82 
83  /* Be careful not to put the key DLL in any list. */
84  key_dll.name = (char *) name;
85  key_dll.base_addr = base_addr;
86 
87  dll = (void *) find_inferior (&all_dlls, match_dll, &key_dll);
88 
89  if (dll == NULL)
90  /* For some inferiors we might get unloaded_dll events without having
91  a corresponding loaded_dll. In that case, the dll cannot be found
92  in ALL_DLL, and there is nothing further for us to do.
93 
94  This has been observed when running 32bit executables on Windows64
95  (i.e. through WOW64, the interface between the 32bits and 64bits
96  worlds). In that case, the inferior always does some strange
97  unloading of unnamed dll. */
98  return;
99  else
100  {
101  /* DLL has been found so remove the entry and free associated
102  resources. */
103  remove_inferior (&all_dlls, &dll->entry);
104  free_one_dll (&dll->entry);
105  dlls_changed = 1;
106  }
107 }
108 
109 void
111 {
114 }
struct inferior_list all_dlls
Definition: dll.c:26
bfd_vma CORE_ADDR
Definition: common-types.h:41
CORE_ADDR base_addr
Definition: dll.h:28
void clear_dlls(void)
Definition: dll.c:110
void for_each_inferior(struct inferior_list *list, void(*action)(struct inferior_list_entry *))
Definition: inferiors.c:47
ptid_t id
Definition: inferiors.h:31
static void free_one_dll(struct inferior_list_entry *inf)
Definition: dll.c:30
const char * name
Definition: tracepoint.c:178
char * xstrdup(const char *s)
Definition: utils.c:44
void add_inferior_to_list(struct inferior_list *list, struct inferior_list_entry *new_inferior)
Definition: inferiors.c:33
void remove_inferior(struct inferior_list *list, struct inferior_list_entry *entry)
Definition: inferiors.c:79
int dlls_changed
Definition: dll.c:27
void unloaded_dll(const char *name, CORE_ADDR base_addr)
Definition: dll.c:78
Definition: dll.h:21
#define get_dll(inf)
Definition: dll.c:21
PTR xmalloc(size_t size)
Definition: common-utils.c:34
Definition: inferiors.h:29
void loaded_dll(const char *name, CORE_ADDR base_addr)
Definition: dll.c:61
static int match_dll(struct inferior_list_entry *inf, void *arg)
Definition: dll.c:42
ptid_t minus_one_ptid
Definition: ptid.c:26
#define UNSPECIFIED_CORE_ADDR
Definition: dll.c:24
void clear_inferior_list(struct inferior_list *list)
Definition: inferiors.c:256
char * name
Definition: dll.h:27
struct inferior_list_entry * find_inferior(struct inferior_list *list, int(*func)(struct inferior_list_entry *, void *), void *arg)
Definition: inferiors.c:188
struct inferior_list_entry entry
Definition: dll.h:25