| 1 | /* Standard wait macros. |
| 2 | Copyright (C) 2000-2020 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of GDB. |
| 5 | |
| 6 | This program is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 3 of the License, or |
| 9 | (at your option) any later version. |
| 10 | |
| 11 | This program is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 18 | |
| 19 | #ifndef COMMON_GDB_WAIT_H |
| 20 | #define COMMON_GDB_WAIT_H |
| 21 | |
| 22 | #ifdef HAVE_SYS_WAIT_H |
| 23 | #include <sys/wait.h> /* POSIX */ |
| 24 | #else |
| 25 | #ifdef HAVE_WAIT_H |
| 26 | #include <wait.h> /* legacy */ |
| 27 | #endif |
| 28 | #endif |
| 29 | |
| 30 | /* Define how to access the int that the wait system call stores. |
| 31 | This has been compatible in all Unix systems since time immemorial, |
| 32 | but various well-meaning people have defined various different |
| 33 | words for the same old bits in the same old int (sometimes claimed |
| 34 | to be a struct). We just know it's an int and we use these macros |
| 35 | to access the bits. */ |
| 36 | |
| 37 | /* The following macros are defined equivalently to their definitions |
| 38 | in POSIX.1. We fail to define WNOHANG and WUNTRACED, which POSIX.1 |
| 39 | <sys/wait.h> defines, since our code does not use waitpid() (but |
| 40 | NOTE exception for GNU/Linux below). We also fail to declare |
| 41 | wait() and waitpid(). |
| 42 | |
| 43 | For MinGW, we use the fact that when a Windows program is |
| 44 | terminated by a fatal exception, its exit code is the value of that |
| 45 | exception, as defined by the various EXCEPTION_* symbols in the |
| 46 | Windows API headers. See also gdb_wait.c. */ |
| 47 | |
| 48 | #ifndef WIFEXITED |
| 49 | # ifdef __MINGW32__ |
| 50 | # define WIFEXITED(w) (((w) & 0xC0000000) == 0) |
| 51 | # else |
| 52 | # define WIFEXITED(w) (((w)&0377) == 0) |
| 53 | # endif |
| 54 | #endif |
| 55 | |
| 56 | #ifndef WIFSIGNALED |
| 57 | # ifdef __MINGW32__ |
| 58 | # define WIFSIGNALED(w) (((w) & 0xC0000000) == 0xC0000000) |
| 59 | # else |
| 60 | # define WIFSIGNALED(w) (((w)&0377) != 0177 && ((w)&~0377) == 0) |
| 61 | # endif |
| 62 | #endif |
| 63 | |
| 64 | #ifndef WIFSTOPPED |
| 65 | #ifdef IBM6000 |
| 66 | |
| 67 | /* Unfortunately, the above comment (about being compatible in all Unix |
| 68 | systems) is not quite correct for AIX, sigh. And AIX 3.2 can generate |
| 69 | status words like 0x57c (sigtrap received after load), and gdb would |
| 70 | choke on it. */ |
| 71 | |
| 72 | #define WIFSTOPPED(w) ((w)&0x40) |
| 73 | |
| 74 | #else |
| 75 | #define WIFSTOPPED(w) (((w)&0377) == 0177) |
| 76 | #endif |
| 77 | #endif |
| 78 | |
| 79 | #ifndef WEXITSTATUS |
| 80 | # ifdef __MINGW32__ |
| 81 | # define WEXITSTATUS(w) ((w) & ~0xC0000000) |
| 82 | # else |
| 83 | # define WEXITSTATUS(w) (((w) >> 8) & 0377) /* same as WRETCODE */ |
| 84 | # endif |
| 85 | #endif |
| 86 | |
| 87 | #ifndef WTERMSIG |
| 88 | # ifdef __MINGW32__ |
| 89 | extern int windows_status_to_termsig (unsigned long); |
| 90 | # define WTERMSIG(w) windows_status_to_termsig (w) |
| 91 | # else |
| 92 | # define WTERMSIG(w) ((w) & 0177) |
| 93 | # endif |
| 94 | #endif |
| 95 | |
| 96 | #ifndef WSTOPSIG |
| 97 | #define WSTOPSIG WEXITSTATUS |
| 98 | #endif |
| 99 | |
| 100 | /* These are not defined in POSIX, but are used by our programs. */ |
| 101 | |
| 102 | #ifndef WSETEXIT |
| 103 | # ifdef W_EXITCODE |
| 104 | #define WSETEXIT(w,status) ((w) = W_EXITCODE(status,0)) |
| 105 | # else |
| 106 | #define WSETEXIT(w,status) ((w) = (0 | ((status) << 8))) |
| 107 | # endif |
| 108 | #endif |
| 109 | |
| 110 | #ifndef W_STOPCODE |
| 111 | #define W_STOPCODE(sig) ((sig) << 8 | 0x7f) |
| 112 | #endif |
| 113 | |
| 114 | #ifndef WSETSTOP |
| 115 | #define WSETSTOP(w,sig) ((w) = W_STOPCODE(sig)) |
| 116 | #endif |
| 117 | |
| 118 | /* For native GNU/Linux we may use waitpid and the __WCLONE option. |
| 119 | <GRIPE> It is of course dangerous not to use the REAL header file... |
| 120 | </GRIPE>. */ |
| 121 | |
| 122 | /* Bits in the third argument to `waitpid'. */ |
| 123 | #ifndef WNOHANG |
| 124 | #define WNOHANG 1 /* Don't block waiting. */ |
| 125 | #endif |
| 126 | |
| 127 | #ifndef WUNTRACED |
| 128 | #define WUNTRACED 2 /* Report status of stopped children. */ |
| 129 | #endif |
| 130 | |
| 131 | #ifndef __WCLONE |
| 132 | #define __WCLONE 0x80000000 /* Wait for cloned process. */ |
| 133 | #endif |
| 134 | |
| 135 | #endif /* COMMON_GDB_WAIT_H */ |