1 | /* Minimal tests to verify libc_malloc_debug.so functionality. |
2 | Copyright (C) 2021-2022 Free Software Foundation, Inc. |
3 | This file is part of the GNU C Library. |
4 | |
5 | The GNU C Library is free software; you can redistribute it and/or |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either |
8 | version 2.1 of the License, or (at your option) any later version. |
9 | |
10 | The GNU C Library 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 GNU |
13 | Lesser General Public License for more details. |
14 | |
15 | You should have received a copy of the GNU Lesser General Public |
16 | License along with the GNU C Library; if not, see |
17 | <https://www.gnu.org/licenses/>. */ |
18 | |
19 | #include <stdio.h> |
20 | #include <stdlib.h> |
21 | #include <malloc.h> |
22 | #include <shlib-compat.h> |
23 | #include <libc-diag.h> |
24 | |
25 | #include <support/check.h> |
26 | #include <support/support.h> |
27 | |
28 | extern void (*volatile __free_hook) (void *, const void *); |
29 | extern void *(*volatile __malloc_hook)(size_t, const void *); |
30 | extern void *(*volatile __realloc_hook)(void *, size_t, const void *); |
31 | extern void *(*volatile __memalign_hook)(size_t, size_t, const void *); |
32 | |
33 | int hook_count, call_count; |
34 | |
35 | DIAG_PUSH_NEEDS_COMMENT; |
36 | DIAG_IGNORE_NEEDS_COMMENT (4.9, "-Wdeprecated-declarations" ); |
37 | |
38 | void |
39 | free_called (void *mem, const void *address) |
40 | { |
41 | hook_count++; |
42 | __free_hook = NULL; |
43 | free (ptr: mem); |
44 | __free_hook = free_called; |
45 | } |
46 | |
47 | void * |
48 | malloc_called (size_t bytes, const void *address) |
49 | { |
50 | hook_count++; |
51 | __malloc_hook = NULL; |
52 | void *mem = malloc (size: bytes); |
53 | __malloc_hook = malloc_called; |
54 | return mem; |
55 | } |
56 | |
57 | void * |
58 | realloc_called (void *oldptr, size_t bytes, const void *address) |
59 | { |
60 | hook_count++; |
61 | __realloc_hook = NULL; |
62 | void *mem = realloc (ptr: oldptr, size: bytes); |
63 | __realloc_hook = realloc_called; |
64 | return mem; |
65 | } |
66 | |
67 | void * |
68 | calloc_called (size_t n, size_t size, const void *address) |
69 | { |
70 | hook_count++; |
71 | __malloc_hook = NULL; |
72 | void *mem = calloc (nmemb: n, size: size); |
73 | __malloc_hook = malloc_called; |
74 | return mem; |
75 | } |
76 | |
77 | void * |
78 | memalign_called (size_t align, size_t size, const void *address) |
79 | { |
80 | hook_count++; |
81 | __memalign_hook = NULL; |
82 | void *mem = memalign (alignment: align, size: size); |
83 | __memalign_hook = memalign_called; |
84 | return mem; |
85 | } |
86 | |
87 | static void initialize_hooks (void) |
88 | { |
89 | __free_hook = free_called; |
90 | __malloc_hook = malloc_called; |
91 | __realloc_hook = realloc_called; |
92 | __memalign_hook = memalign_called; |
93 | } |
94 | void (*__malloc_initialize_hook) (void) = initialize_hooks; |
95 | compat_symbol_reference (libc, __malloc_initialize_hook, |
96 | __malloc_initialize_hook, GLIBC_2_0); |
97 | compat_symbol_reference (libc, __free_hook, |
98 | __free_hook, GLIBC_2_0); |
99 | compat_symbol_reference (libc, __malloc_hook, |
100 | __malloc_hook, GLIBC_2_0); |
101 | compat_symbol_reference (libc, __realloc_hook, |
102 | __realloc_hook, GLIBC_2_0); |
103 | compat_symbol_reference (libc, __memalign_hook, |
104 | __memalign_hook, GLIBC_2_0); |
105 | |
106 | DIAG_POP_NEEDS_COMMENT; |
107 | |
108 | static int |
109 | do_test (void) |
110 | { |
111 | void *p; |
112 | p = malloc (size: 0); |
113 | TEST_VERIFY_EXIT (p != NULL); |
114 | call_count++; |
115 | |
116 | p = realloc (ptr: p, size: 0); |
117 | TEST_VERIFY_EXIT (p == NULL); |
118 | call_count++; |
119 | |
120 | p = calloc (nmemb: 512, size: 1); |
121 | TEST_VERIFY_EXIT (p != NULL); |
122 | call_count++; |
123 | |
124 | free (ptr: p); |
125 | call_count++; |
126 | |
127 | p = memalign (alignment: 0x100, size: 0x100); |
128 | TEST_VERIFY_EXIT (p != NULL); |
129 | call_count++; |
130 | |
131 | free (ptr: p); |
132 | call_count++; |
133 | |
134 | printf (format: "call_count: %d, hook_count: %d\n" , call_count, hook_count); |
135 | |
136 | #ifdef HOOKS_ENABLED |
137 | TEST_VERIFY_EXIT (call_count == hook_count); |
138 | #else |
139 | TEST_VERIFY_EXIT (hook_count == 0); |
140 | #endif |
141 | |
142 | exit (0); |
143 | } |
144 | |
145 | #include <support/test-driver.c> |
146 | |