1 /* Debugging routines for the remote server for GDB.
2 Copyright (C) 2014-2019 Free Software Foundation, Inc.
4 This file is part of GDB.
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.
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.
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/>. */
22 #if !defined (IN_PROCESS_AGENT)
26 /* Output file for debugging. Default to standard error. */
27 FILE *debug_file
= stderr
;
29 /* Enable miscellaneous debugging output. The name is historical - it
30 was originally used to debug LinuxThreads support. */
33 /* Include timestamps in debugging output. */
36 #if !defined (IN_PROCESS_AGENT)
41 debug_set_output (const char *new_debug_file
)
43 /* Close any existing file and reset to standard error. */
44 if (debug_file
!= stderr
)
50 /* Catch empty filenames. */
51 if (new_debug_file
== nullptr || strlen (new_debug_file
) == 0)
54 FILE *fptr
= fopen (new_debug_file
, "w");
58 debug_printf ("Cannot open %s for writing. %s. Switching to stderr.\n",
59 new_debug_file
, strerror (errno
));
68 /* Print a debugging message.
69 If the text begins a new line it is preceded by a timestamp.
70 We don't get fancy with newline checking, we just check whether the
71 previous call ended with "\n". */
74 debug_vprintf (const char *format
, va_list ap
)
76 #if !defined (IN_PROCESS_AGENT)
77 /* N.B. Not thread safe, and can't be used, as is, with IPA. */
78 static int new_line
= 1;
80 if (debug_timestamp
&& new_line
)
82 using namespace std::chrono
;
84 steady_clock::time_point now
= steady_clock::now ();
85 seconds s
= duration_cast
<seconds
> (now
.time_since_epoch ());
86 microseconds us
= duration_cast
<microseconds
> (now
.time_since_epoch ()) - s
;
88 fprintf (debug_file
, "%ld.%06ld ", (long) s
.count (), (long) us
.count ());
92 vfprintf (debug_file
, format
, ap
);
94 #if !defined (IN_PROCESS_AGENT)
96 new_line
= format
[strlen (format
) - 1] == '\n';
100 /* Flush debugging output.
101 This is called, for example, when starting an inferior to ensure all debug
102 output thus far appears before any inferior output. */
110 /* Notify the user that the code is entering FUNCTION_NAME.
111 FUNCTION_NAME is the name of the calling function, or NULL if unknown.
113 This is intended to be called via the debug_enter macro. */
116 do_debug_enter (const char *function_name
)
118 if (function_name
!= NULL
)
119 debug_printf (">>>> entering %s\n", function_name
);
122 /* Notify the user that the code is exiting FUNCTION_NAME.
123 FUNCTION_NAME is the name of the calling function, or NULL if unknown.
125 This is intended to be called via the debug_exit macro. */
128 do_debug_exit (const char *function_name
)
130 if (function_name
!= NULL
)
131 debug_printf ("<<<< exiting %s\n", function_name
);
137 debug_write (const void *buf
, size_t nbyte
)
139 int fd
= fileno (debug_file
);
140 return write (fd
, buf
, nbyte
);
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