1 /* Standard wait macros. 2 Copyright (C) 2000-2021 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 */ 136