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/* Debugging routines for the remote server for GDB.
Copyright (C) 2014-2020 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 "server.h"
#include <chrono>
#if !defined (IN_PROCESS_AGENT)
int remote_debug = 0;
#endif
/* Output file for debugging. Default to standard error. */
FILE *debug_file = stderr;
/* See debug.h. */
int debug_threads;
/* Include timestamps in debugging output. */
int debug_timestamp;
#if !defined (IN_PROCESS_AGENT)
/* See debug.h. */
void
debug_set_output (const char *new_debug_file)
{
/* Close any existing file and reset to standard error. */
if (debug_file != stderr)
{
fclose (debug_file);
}
debug_file = stderr;
/* Catch empty filenames. */
if (new_debug_file == nullptr || strlen (new_debug_file) == 0)
return;
FILE *fptr = fopen (new_debug_file, "w");
if (fptr == nullptr)
{
debug_printf ("Cannot open %s for writing. %s. Switching to stderr.\n",
new_debug_file, safe_strerror (errno));
return;
}
debug_file = fptr;
}
#endif
/* Print a debugging message.
If the text begins a new line it is preceded by a timestamp.
We don't get fancy with newline checking, we just check whether the
previous call ended with "\n". */
void
debug_vprintf (const char *format, va_list ap)
{
#if !defined (IN_PROCESS_AGENT)
/* N.B. Not thread safe, and can't be used, as is, with IPA. */
static int new_line = 1;
if (debug_timestamp && new_line)
{
using namespace std::chrono;
steady_clock::time_point now = steady_clock::now ();
seconds s = duration_cast<seconds> (now.time_since_epoch ());
microseconds us = duration_cast<microseconds> (now.time_since_epoch ()) - s;
fprintf (debug_file, "%ld.%06ld ", (long) s.count (), (long) us.count ());
}
#endif
vfprintf (debug_file, format, ap);
#if !defined (IN_PROCESS_AGENT)
if (*format)
new_line = format[strlen (format) - 1] == '\n';
#endif
}
/* Flush debugging output.
This is called, for example, when starting an inferior to ensure all debug
output thus far appears before any inferior output. */
void
debug_flush (void)
{
fflush (debug_file);
}
/* Notify the user that the code is entering FUNCTION_NAME.
FUNCTION_NAME is the name of the calling function, or NULL if unknown.
This is intended to be called via the debug_enter macro. */
void
do_debug_enter (const char *function_name)
{
if (function_name != NULL)
debug_printf (">>>> entering %s\n", function_name);
}
/* Notify the user that the code is exiting FUNCTION_NAME.
FUNCTION_NAME is the name of the calling function, or NULL if unknown.
This is intended to be called via the debug_exit macro. */
void
do_debug_exit (const char *function_name)
{
if (function_name != NULL)
debug_printf ("<<<< exiting %s\n", function_name);
}
/* See debug.h. */
ssize_t
debug_write (const void *buf, size_t nbyte)
{
int fd = fileno (debug_file);
return write (fd, buf, nbyte);
}
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