1 /* Debugging routines for the remote server for GDB. 2 Copyright (C) 2014-2023 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 #include "server.h" 20 #include <chrono> 21 22 #if !defined (IN_PROCESS_AGENT) 23 bool remote_debug = false; 24 #endif 25 26 /* Output file for debugging. Default to standard error. */ 27 static FILE *debug_file = stderr; 28 29 /* See debug.h. */ 30 bool debug_threads; 31 32 /* Include timestamps in debugging output. */ 33 int debug_timestamp; 34 35 #if !defined (IN_PROCESS_AGENT) 36 37 /* See debug.h. */ 38 39 void 40 debug_set_output (const char *new_debug_file) 41 { 42 /* Close any existing file and reset to standard error. */ 43 if (debug_file != stderr) 44 { 45 fclose (debug_file); 46 } 47 debug_file = stderr; 48 49 /* Catch empty filenames. */ 50 if (new_debug_file == nullptr || strlen (new_debug_file) == 0) 51 return; 52 53 FILE *fptr = fopen (new_debug_file, "w"); 54 55 if (fptr == nullptr) 56 { 57 debug_printf ("Cannot open %s for writing. %s. Switching to stderr.\n", 58 new_debug_file, safe_strerror (errno)); 59 return; 60 } 61 62 debug_file = fptr; 63 } 64 65 #endif 66 67 /* See gdbsupport/common-debug.h. */ 68 69 int debug_print_depth = 0; 70 71 /* Print a debugging message. 72 If the text begins a new line it is preceded by a timestamp. 73 We don't get fancy with newline checking, we just check whether the 74 previous call ended with "\n". */ 75 76 void 77 debug_vprintf (const char *format, va_list ap) 78 { 79 #if !defined (IN_PROCESS_AGENT) 80 /* N.B. Not thread safe, and can't be used, as is, with IPA. */ 81 static int new_line = 1; 82 83 if (debug_timestamp && new_line) 84 { 85 using namespace std::chrono; 86 87 steady_clock::time_point now = steady_clock::now (); 88 seconds s = duration_cast<seconds> (now.time_since_epoch ()); 89 microseconds us = duration_cast<microseconds> (now.time_since_epoch ()) - s; 90 91 fprintf (debug_file, "%ld.%06ld ", (long) s.count (), (long) us.count ()); 92 } 93 #endif 94 95 vfprintf (debug_file, format, ap); 96 97 #if !defined (IN_PROCESS_AGENT) 98 if (*format) 99 new_line = format[strlen (format) - 1] == '\n'; 100 #endif 101 } 102 103 /* Flush debugging output. 104 This is called, for example, when starting an inferior to ensure all debug 105 output thus far appears before any inferior output. */ 106 107 void 108 debug_flush (void) 109 { 110 fflush (debug_file); 111 } 112 113 /* See debug.h. */ 114 115 ssize_t 116 debug_write (const void *buf, size_t nbyte) 117 { 118 int fd = fileno (debug_file); 119 return write (fd, buf, nbyte); 120 } 121