c058728c31
Add the threads_debug_printf and THREADS_SCOPED_DEBUG_ENTER_EXIT, which use the logging infrastructure from gdbsupport/common-debug.h. Replace all debug_print uses that are predicated by debug_threads with threads_dethreads_debug_printf. Replace uses of the debug_enter and debug_exit macros with THREADS_SCOPED_DEBUG_ENTER_EXIT, which serves essentially the same purpose, but allows showing what comes between the enter and the exit in an indented form. Note that "threads" debug is currently used for a bit of everything in GDBserver, not only threads related stuff. It should ideally be cleaned up and separated logically as is done in GDB, but that's out of the scope of this patch. Change-Id: I2d4546464462cb4c16f7f1168c5cec5a89f2289a
120 lines
3 KiB
C++
120 lines
3 KiB
C++
/* Debugging routines for the remote server for GDB.
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Copyright (C) 2014-2022 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "server.h"
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#include <chrono>
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#if !defined (IN_PROCESS_AGENT)
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int remote_debug = 0;
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#endif
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/* Output file for debugging. Default to standard error. */
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static FILE *debug_file = stderr;
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/* See debug.h. */
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bool debug_threads;
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/* Include timestamps in debugging output. */
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int debug_timestamp;
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#if !defined (IN_PROCESS_AGENT)
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/* See debug.h. */
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void
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debug_set_output (const char *new_debug_file)
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{
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/* Close any existing file and reset to standard error. */
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if (debug_file != stderr)
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{
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fclose (debug_file);
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}
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debug_file = stderr;
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/* Catch empty filenames. */
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if (new_debug_file == nullptr || strlen (new_debug_file) == 0)
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return;
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FILE *fptr = fopen (new_debug_file, "w");
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if (fptr == nullptr)
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{
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debug_printf ("Cannot open %s for writing. %s. Switching to stderr.\n",
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new_debug_file, safe_strerror (errno));
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return;
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}
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debug_file = fptr;
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}
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#endif
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/* See gdbsupport/common-debug.h. */
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int debug_print_depth = 0;
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/* Print a debugging message.
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If the text begins a new line it is preceded by a timestamp.
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We don't get fancy with newline checking, we just check whether the
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previous call ended with "\n". */
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void
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debug_vprintf (const char *format, va_list ap)
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{
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#if !defined (IN_PROCESS_AGENT)
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/* N.B. Not thread safe, and can't be used, as is, with IPA. */
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static int new_line = 1;
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if (debug_timestamp && new_line)
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{
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using namespace std::chrono;
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steady_clock::time_point now = steady_clock::now ();
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seconds s = duration_cast<seconds> (now.time_since_epoch ());
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microseconds us = duration_cast<microseconds> (now.time_since_epoch ()) - s;
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fprintf (debug_file, "%ld.%06ld ", (long) s.count (), (long) us.count ());
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}
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#endif
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vfprintf (debug_file, format, ap);
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#if !defined (IN_PROCESS_AGENT)
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if (*format)
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new_line = format[strlen (format) - 1] == '\n';
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#endif
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}
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/* Flush debugging output.
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This is called, for example, when starting an inferior to ensure all debug
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output thus far appears before any inferior output. */
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void
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debug_flush (void)
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{
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fflush (debug_file);
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}
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/* See debug.h. */
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ssize_t
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debug_write (const void *buf, size_t nbyte)
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{
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int fd = fileno (debug_file);
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return write (fd, buf, nbyte);
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}
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