Commit | Line | Data |
---|---|---|
96d7229d LM |
1 | /* Wrapper implementation for waitpid for GNU/Linux (LWP layer). |
2 | ||
e2882c85 | 3 | Copyright (C) 2001-2018 Free Software Foundation, Inc. |
96d7229d LM |
4 | |
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 3 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
19 | ||
b006a80e GB |
20 | #include "common-defs.h" |
21 | ||
96d7229d | 22 | #ifdef GDBSERVER |
b006a80e GB |
23 | /* FIXME: server.h is required for the definition of debug_threads |
24 | which is used in the gdbserver-specific debug printing in | |
25 | linux_debug. This code should be made available to GDB also, | |
26 | but the lack of a suitable flag to enable it prevents this. */ | |
96d7229d | 27 | #include "server.h" |
96d7229d LM |
28 | #endif |
29 | ||
125f8a3d GB |
30 | #include "linux-nat.h" |
31 | #include "linux-waitpid.h" | |
96d7229d LM |
32 | #include "gdb_wait.h" |
33 | ||
34 | /* Print debugging output based on the format string FORMAT and | |
35 | its parameters. */ | |
36 | ||
1e5b66ed | 37 | static inline void ATTRIBUTE_PRINTF (1,2) |
96d7229d LM |
38 | linux_debug (const char *format, ...) |
39 | { | |
40 | #ifdef GDBSERVER | |
41 | if (debug_threads) | |
42 | { | |
43 | va_list args; | |
44 | va_start (args, format); | |
45 | vfprintf (stderr, format, args); | |
96d7229d LM |
46 | va_end (args); |
47 | } | |
96d7229d LM |
48 | #endif |
49 | } | |
50 | ||
d632a097 PA |
51 | /* Convert wait status STATUS to a string. Used for printing debug |
52 | messages only. */ | |
53 | ||
54 | char * | |
55 | status_to_str (int status) | |
56 | { | |
57 | static char buf[64]; | |
58 | ||
59 | if (WIFSTOPPED (status)) | |
60 | { | |
61 | if (WSTOPSIG (status) == SYSCALL_SIGTRAP) | |
62 | snprintf (buf, sizeof (buf), "%s (stopped at syscall)", | |
63 | strsignal (SIGTRAP)); | |
64 | else | |
65 | snprintf (buf, sizeof (buf), "%s (stopped)", | |
66 | strsignal (WSTOPSIG (status))); | |
67 | } | |
68 | else if (WIFSIGNALED (status)) | |
69 | snprintf (buf, sizeof (buf), "%s (terminated)", | |
70 | strsignal (WTERMSIG (status))); | |
71 | else | |
72 | snprintf (buf, sizeof (buf), "%d (exited)", WEXITSTATUS (status)); | |
73 | ||
74 | return buf; | |
75 | } | |
76 | ||
4a6ed09b | 77 | /* See linux-waitpid.h. */ |
96d7229d LM |
78 | |
79 | int | |
80 | my_waitpid (int pid, int *status, int flags) | |
81 | { | |
82 | int ret, out_errno; | |
83 | ||
84 | linux_debug ("my_waitpid (%d, 0x%x)\n", pid, flags); | |
85 | ||
4a6ed09b | 86 | do |
96d7229d | 87 | { |
4a6ed09b | 88 | ret = waitpid (pid, status, flags); |
96d7229d | 89 | } |
4a6ed09b PA |
90 | while (ret == -1 && errno == EINTR); |
91 | out_errno = errno; | |
96d7229d LM |
92 | |
93 | linux_debug ("my_waitpid (%d, 0x%x): status(%x), %d\n", | |
bf47e248 | 94 | pid, flags, (ret > 0 && status != NULL) ? *status : -1, ret); |
96d7229d LM |
95 | |
96 | errno = out_errno; | |
97 | return ret; | |
98 | } |