]>
Commit | Line | Data |
---|---|---|
86925eef CC |
1 | // weak_undef_test.cc -- test handling of weak undefined symbols for gold |
2 | ||
3 | // Copyright 2008 Free Software Foundation, Inc. | |
4 | // Written by Cary Coutant <ccoutant@google.com>. | |
5 | ||
6 | // This file is part of gold. | |
7 | ||
8 | // This program is free software; you can redistribute it and/or modify | |
9 | // it under the terms of the GNU General Public License as published by | |
10 | // the Free Software Foundation; either version 3 of the License, or | |
11 | // (at your option) any later version. | |
12 | ||
13 | // This program is distributed in the hope that it will be useful, | |
14 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | // GNU General Public License for more details. | |
17 | ||
18 | // You should have received a copy of the GNU General Public License | |
19 | // along with this program; if not, write to the Free Software | |
20 | // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
21 | // MA 02110-1301, USA. | |
22 | ||
23 | // We test that we correctly deal with weak undefined symbols. | |
f3c69fca CC |
24 | // We need to make sure that a weak undefined symbol in the main |
25 | // program is resolved to zero by the linker and that no dynamic | |
26 | // relocation is generated. We also make sure that a weak undefined | |
27 | // symbol in a shared library can resolve to a symbol in the main | |
28 | // program. | |
86925eef CC |
29 | |
30 | // This file will be linked with a shared library that does not | |
31 | // define the symbol, so that the symbol remains undefined. | |
32 | // Through the use of LD_LIBRARY_PATH, the program will load | |
33 | // an alternate shared library that does define the symbol, | |
34 | // so that we can detect whether the symbol was left for runtime | |
35 | // resolution. | |
36 | ||
37 | ||
38 | #include <cstdio> | |
f3c69fca | 39 | #include "weak_undef.h" |
86925eef CC |
40 | |
41 | extern int no_such_symbol_ __attribute__ ((weak)); | |
42 | ||
f3c69fca CC |
43 | int *p1 = &no_such_symbol_; |
44 | ||
45 | int v2 = 42; | |
46 | ||
86925eef CC |
47 | int |
48 | main() | |
49 | { | |
f3c69fca CC |
50 | int status = 0; |
51 | int v; | |
52 | ||
53 | if ((v = t1()) != 2) | |
54 | { | |
55 | fprintf(stderr, "FAILED weak undef test 1: %s\n", | |
56 | "bound to wrong library"); | |
57 | status = 1; | |
58 | } | |
59 | ||
60 | if ((v = t2()) != 42) | |
61 | { | |
62 | fprintf(stderr, "FAILED weak undef test 2: expected %d, got %d\n", | |
63 | 42, v); | |
64 | status = 1; | |
65 | } | |
66 | ||
67 | if ((v = t3()) != 42) | |
68 | { | |
69 | fprintf(stderr, "FAILED weak undef test 3: expected %d, got %d\n", | |
70 | 42, v); | |
71 | status = 1; | |
72 | } | |
73 | ||
86925eef CC |
74 | if (&no_such_symbol_ != NULL) |
75 | { | |
f3c69fca CC |
76 | fprintf(stderr, "FAILED weak undef test 4: %s\n", |
77 | "&no_such_symbol_ is not NULL"); | |
78 | status = 1; | |
86925eef | 79 | } |
f3c69fca CC |
80 | |
81 | if (p1 != NULL) | |
82 | { | |
83 | fprintf(stderr, "FAILED weak undef test 5: %s\n", | |
84 | "p1 is not NULL"); | |
85 | status = 1; | |
86 | } | |
87 | ||
88 | return status; | |
86925eef | 89 | } |