Commit | Line | Data |
---|---|---|
00c7eacf JK |
1 | /* This testcase is part of GDB, the GNU debugger. |
2 | ||
3 | Copyright 2009 Free Software Foundation, Inc. | |
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 | ||
33 | #define STACK_SIZE 0x1000 | |
34 | ||
35 | static int | |
36 | fn_return (void *unused) | |
37 | { | |
38 | return 0; /* at-fn_return */ | |
39 | } | |
40 | ||
41 | static int | |
42 | fn (void *unused) | |
43 | { | |
44 | int i; | |
45 | unsigned char *stack; | |
46 | int new_pid; | |
47 | ||
48 | i = sleep (1); | |
49 | assert (i == 0); | |
50 | ||
51 | stack = malloc (STACK_SIZE); | |
52 | assert (stack != NULL); | |
53 | ||
54 | new_pid = clone (fn_return, stack + STACK_SIZE, CLONE_FILES | CLONE_VM, NULL, | |
55 | NULL, NULL, NULL); | |
56 | assert (new_pid > 0); | |
57 | ||
58 | return 0; | |
59 | } | |
60 | ||
61 | int | |
62 | main (int argc, char **argv) | |
63 | { | |
64 | unsigned char *stack; | |
65 | int new_pid; | |
66 | ||
67 | stack = malloc (STACK_SIZE); | |
68 | assert (stack != NULL); | |
69 | ||
70 | new_pid = clone (fn, stack + STACK_SIZE, CLONE_FILES | CLONE_VM, NULL, NULL, | |
71 | NULL, NULL); | |
72 | assert (new_pid > 0); | |
73 | ||
74 | return 0; | |
75 | } |