| /* Wrapper implementation for waitpid for GNU/Linux (LWP layer). |
| |
| Copyright (C) 2001-2018 Free Software Foundation, Inc. |
| |
| This file is part of GDB. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| |
| #include "common-defs.h" |
| |
| #ifdef GDBSERVER |
| /* FIXME: server.h is required for the definition of debug_threads |
| which is used in the gdbserver-specific debug printing in |
| linux_debug. This code should be made available to GDB also, |
| but the lack of a suitable flag to enable it prevents this. */ |
| #include "server.h" |
| #endif |
| |
| #include "linux-nat.h" |
| #include "linux-waitpid.h" |
| #include "gdb_wait.h" |
| |
| /* Print debugging output based on the format string FORMAT and |
| its parameters. */ |
| |
| static inline void ATTRIBUTE_PRINTF (1,2) |
| linux_debug (const char *format, ...) |
| { |
| #ifdef GDBSERVER |
| if (debug_threads) |
| { |
| va_list args; |
| va_start (args, format); |
| vfprintf (stderr, format, args); |
| va_end (args); |
| } |
| #endif |
| } |
| |
| /* Convert wait status STATUS to a string. Used for printing debug |
| messages only. */ |
| |
| char * |
| status_to_str (int status) |
| { |
| static char buf[64]; |
| |
| if (WIFSTOPPED (status)) |
| { |
| if (WSTOPSIG (status) == SYSCALL_SIGTRAP) |
| snprintf (buf, sizeof (buf), "%s (stopped at syscall)", |
| strsignal (SIGTRAP)); |
| else |
| snprintf (buf, sizeof (buf), "%s (stopped)", |
| strsignal (WSTOPSIG (status))); |
| } |
| else if (WIFSIGNALED (status)) |
| snprintf (buf, sizeof (buf), "%s (terminated)", |
| strsignal (WTERMSIG (status))); |
| else |
| snprintf (buf, sizeof (buf), "%d (exited)", WEXITSTATUS (status)); |
| |
| return buf; |
| } |
| |
| /* See linux-waitpid.h. */ |
| |
| int |
| my_waitpid (int pid, int *status, int flags) |
| { |
| int ret, out_errno; |
| |
| linux_debug ("my_waitpid (%d, 0x%x)\n", pid, flags); |
| |
| do |
| { |
| ret = waitpid (pid, status, flags); |
| } |
| while (ret == -1 && errno == EINTR); |
| out_errno = errno; |
| |
| linux_debug ("my_waitpid (%d, 0x%x): status(%x), %d\n", |
| pid, flags, (ret > 0 && status != NULL) ? *status : -1, ret); |
| |
| errno = out_errno; |
| return ret; |
| } |