GDB (xrefs)

/tmp/gdb-8.1/gdb/gdb-dlfcn.c
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1 /* Platform independent shared object routines for GDB.
2
3 Copyright (C) 2011-2018 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 "gdb-dlfcn.h"
22
23 #ifdef HAVE_DLFCN_H
24 #include <dlfcn.h>
25 #elif __MINGW32__
26 #include <windows.h>
27 #else
28 /* Unsupported configuration. */
29 #define NO_SHARED_LIB
30 #endif
31
32 #ifdef NO_SHARED_LIB
33
34 gdb_dlhandle_up
35 gdb_dlopen (const char *filename)
36 {
37 gdb_assert_not_reached ("gdb_dlopen should not be called on this platform.");
38 }
39
40 void *
41 gdb_dlsym (const gdb_dlhandle_up &handle, const char *symbol)
42 {
43 gdb_assert_not_reached ("gdb_dlsym should not be called on this platform.");
44 }
45
46 void
47 dlclose_deleter::operator() (void *handle) const
48 {
49 gdb_assert_not_reached ("gdb_dlclose should not be called on this platform.");
50 }
51
52 int
53 is_dl_available (void)
54 {
55 return 0;
56 }
57
58 #else /* NO_SHARED_LIB */
59
60 gdb_dlhandle_up
61 gdb_dlopen (const char *filename)
62 {
63 void *result;
64 #ifdef HAVE_DLFCN_H
65 result = dlopen (filename, RTLD_NOW);
66 #elif __MINGW32__
67 result = (void *) LoadLibrary (filename);
68 #endif
69 if (result != NULL)
70 return gdb_dlhandle_up (result);
71
72 #ifdef HAVE_DLFCN_H
73 error (_("Could not load %s: %s"), filename, dlerror());
74 #else
75 {
76 LPVOID buffer;
77 DWORD dw;
78
79 dw = GetLastError();
80
81 FormatMessage (FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM |
82 FORMAT_MESSAGE_IGNORE_INSERTS,
83 NULL, dw, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
84 (LPTSTR) &buffer,
85 0, NULL);
86
87 error (_("Could not load %s: %s"), filename, (char *) buffer);
88 }
89 #endif
90 }
91
92 void *
93 gdb_dlsym (const gdb_dlhandle_up &handle, const char *symbol)
94 {
95 #ifdef HAVE_DLFCN_H
96 return dlsym (handle.get (), symbol);
97 #elif __MINGW32__
98 return (void *) GetProcAddress ((HMODULE) handle.get (), symbol);
99 #endif
100 }
101
102 void
103 dlclose_deleter::operator() (void *handle) const
104 {
105 #ifdef HAVE_DLFCN_H
106 dlclose (handle);
107 #elif __MINGW32__
108 FreeLibrary ((HMODULE) handle);
109 #endif
110 }
111
112 int
113 is_dl_available (void)
114 {
115 return 1;
116 }
117
118 #endif /* NO_SHARED_LIB */
_
#define _(String)
Definition: gdb_locale.h:35
defs.h
is_dl_available
int is_dl_available(void)
Definition: gdb-dlfcn.c:113
gdb_dlopen
gdb_dlhandle_up gdb_dlopen(const char *filename)
Definition: gdb-dlfcn.c:61
gdb_assert_not_reached
#define gdb_assert_not_reached(message)
Definition: gdb_assert.h:55
gdb-dlfcn.h
symbol
const char * symbol
Definition: signals.c:48
buffer
Definition: buffer.h:23
gdb_dlhandle_up
std::unique_ptr< void, dlclose_deleter > gdb_dlhandle_up
Definition: gdb-dlfcn.h:32
dlclose_deleter::operator()
void operator()(void *handle) const
Definition: gdb-dlfcn.c:103
gdb_dlsym
void * gdb_dlsym(const gdb_dlhandle_up &handle, const char *symbol)
Definition: gdb-dlfcn.c:93
symbol
Definition: symtab.h:1049
error
void error(const char *fmt,...)
Definition: errors.c:38