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00c7eacf JK |
1 | /* This testcase is part of GDB, the GNU debugger. |
2 | ||
ecd75fc8 | 3 | Copyright 2009-2014 Free Software Foundation, Inc. |
00c7eacf JK |
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 | Do not use threads as we need to exploit a bug in LWP code masked by the | |
19 | threads code otherwise. | |
20 | ||
21 | INFERIOR_PTID must point to exited LWP. Here we use the initial LWP as it | |
22 | is automatically INFERIOR_PTID for GDB. | |
23 | ||
24 | Finally we need to call target_resume (RESUME_ALL, ...) which we invoke by | |
25 | NEW_THREAD_EVENT (called from the new LWP as initial LWP is exited now). */ | |
26 | ||
27 | #define _GNU_SOURCE | |
28 | #include <sched.h> | |
29 | #include <assert.h> | |
30 | #include <unistd.h> | |
31 | #include <stdlib.h> | |
32 | ||
e4b7f41c JK |
33 | #include <features.h> |
34 | #ifdef __UCLIBC__ | |
35 | #if !(defined(__UCLIBC_HAS_MMU__) || defined(__ARCH_HAS_MMU__)) | |
36 | #define HAS_NOMMU | |
37 | #endif | |
38 | #endif | |
39 | ||
00c7eacf JK |
40 | #define STACK_SIZE 0x1000 |
41 | ||
42 | static int | |
43 | fn_return (void *unused) | |
44 | { | |
45 | return 0; /* at-fn_return */ | |
46 | } | |
47 | ||
48 | static int | |
49 | fn (void *unused) | |
50 | { | |
51 | int i; | |
52 | unsigned char *stack; | |
53 | int new_pid; | |
54 | ||
55 | i = sleep (1); | |
56 | assert (i == 0); | |
57 | ||
58 | stack = malloc (STACK_SIZE); | |
59 | assert (stack != NULL); | |
60 | ||
e4b7f41c JK |
61 | new_pid = clone (fn_return, stack + STACK_SIZE, CLONE_FILES |
62 | #if defined(__UCLIBC__) && defined(HAS_NOMMU) | |
63 | | CLONE_VM | |
64 | #endif /* defined(__UCLIBC__) && defined(HAS_NOMMU) */ | |
65 | , NULL, NULL, NULL, NULL); | |
00c7eacf JK |
66 | assert (new_pid > 0); |
67 | ||
68 | return 0; | |
69 | } | |
70 | ||
71 | int | |
72 | main (int argc, char **argv) | |
73 | { | |
74 | unsigned char *stack; | |
75 | int new_pid; | |
76 | ||
77 | stack = malloc (STACK_SIZE); | |
78 | assert (stack != NULL); | |
79 | ||
e4b7f41c JK |
80 | new_pid = clone (fn, stack + STACK_SIZE, CLONE_FILES |
81 | #if defined(__UCLIBC__) && defined(HAS_NOMMU) | |
82 | | CLONE_VM | |
83 | #endif /* defined(__UCLIBC__) && defined(HAS_NOMMU) */ | |
84 | , NULL, NULL, NULL, NULL); | |
00c7eacf JK |
85 | assert (new_pid > 0); |
86 | ||
87 | return 0; | |
88 | } |