1 /*
2 * Copyright (C) 2022 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 #include <stdlib.h>
17 #include <unistd.h>
18 #include <sys/wait.h>
19 #include <signal.h>
20 #include <sigchain.h>
21 #include <errno.h>
22 #include <string.h>
23 #include "test.h"
24
25 #define UNIT 16
26 #define OFF_OFFSET 2
27 #define FIRST_OFFSET (-4)
28 #define FIRST_OFF_OFFSET 8
29 #define MALLOC_SIZE_S (10 * sizeof(uintptr_t))
30 #define MALLOC_SIZE_L (50 * sizeof(uintptr_t))
31 #define TEST_NUM 512
32
33 struct meta_in {
34 struct meta_in *prev, *next;
35 uintptr_t *mem;
36 };
37
38 struct group_in {
39 struct meta_in *meta;
40 };
41
get_group(const uint8_t * p)42 static struct group_in *get_group(const uint8_t *p)
43 {
44 int offset = *(const uint16_t *)(p - OFF_OFFSET);
45
46 if (p[FIRST_OFFSET]) {
47 offset = *(uint32_t *)(p - FIRST_OFF_OFFSET);
48 }
49 struct group_in *base = (void *)(p - UNIT*offset - UNIT);
50 return base;
51 }
52
handler(int s)53 static void handler(int s)
54 {
55 }
56
child(void)57 static int child(void)
58 {
59 void *d0;
60 void *d1;
61
62 struct group_in *g0 = NULL;
63 struct group_in *g1 = NULL;
64 struct group_in *g2 = NULL;
65
66 for (int i = 0; i < TEST_NUM; ++i) {
67 d0 = malloc(MALLOC_SIZE_S);
68 if (!d0) {
69 t_error("Malloc d0 failed: %s\n", strerror(errno));
70 return -1;
71 }
72
73 g0 = get_group(d0);
74
75 d1 = malloc(MALLOC_SIZE_L);
76 if (!d1) {
77 t_error("Malloc d1 failed: %s\n", strerror(errno));
78 return -1;
79 }
80 g1 = get_group(d1);
81
82 if ((uintptr_t)g0->meta->mem == (uintptr_t)g0)
83 t_error("encoding pointer is equal to real pointer 1\n");
84
85 if ((uintptr_t)g1->meta->mem == (uintptr_t)g1)
86 t_error("encoding pointer is equal to real pointer 2\n");
87
88 if ((uintptr_t)g0->meta->prev->next == (uintptr_t)g0->meta->mem)
89 t_error("encoding pointer is equal to real pointer 1\n");
90
91 if ((uintptr_t)g1->meta->prev->next == (uintptr_t)g1->meta->mem)
92 t_error("encoding pointer is equal to real pointer 2\n");
93
94 free(d0);
95 free(d1);
96 }
97
98 return 0;
99 }
100
start_child(void)101 static pid_t start_child(void)
102 {
103 pid_t pid;
104 int ret;
105 pid = fork();
106 if (pid == 0) {
107 ret = child();
108 t_error("child process normally out with %d\n", ret);
109 return ret;
110 }
111 return pid;
112 }
113
main(int argc,char * argv[])114 int main(int argc, char *argv[])
115 {
116 sigset_t set;
117 int status;
118 pid_t pid;
119 int flag = 0;
120
121 sigemptyset(&set);
122 sigaddset(&set, SIGCHLD);
123 sigprocmask(SIG_BLOCK, &set, 0);
124 signal(SIGCHLD, handler);
125 remove_all_special_handler(SIGSEGV);
126
127 pid = start_child();
128 if (pid == -1) {
129 t_error("%s fork failed: %s\n", argv[0], strerror(errno));
130 return -1;
131 }
132 if (sigtimedwait(&set, 0, &(struct timespec){5, 0}) == -1) { /* Wait for 5 seconds */
133 if (errno == EAGAIN)
134 flag = 1;
135 else
136 t_error("%s sigtimedwait failed: %s\n", argv[0], strerror(errno));
137 if (kill(pid, SIGKILL) == -1)
138 t_error("%s kill failed: %s\n", argv[0], strerror(errno));
139 }
140
141 if (waitpid(pid, &status, 0) != pid) {
142 t_error("%s waitpid failed: %s\n", argv[0], strerror(errno));
143 return -1;
144 }
145
146 if (flag) {
147 t_error("Child process time out\n");
148 }
149
150 if (WIFSIGNALED(status)) {
151 if (WTERMSIG(status) != SIGSEGV && WTERMSIG(status) != SIGILL) {
152 t_error("%s child process out with %s\n", argv[0], strsignal(WTERMSIG(status)));
153 return -1;
154 }
155 } else {
156 t_error("%s child process finished normally\n", argv[0]);
157 }
158 return 0;
159 }
160
161