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https://sourceware.org/git/binutils-gdb.git
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8d6a48df54
Building gdb with clang, I run into:
...
src/gdb/gdbserver/linux-low.c:6190:41: error: comparison of unsigned \
expression < 0 is always false [-Werror,-Wtautological-compare]
if (debug_write ("sigchld_handler\n",
sizeof ("sigchld_handler\n") - 1) < 0)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ^ ~
...
This regression is introduced by commit a7e559cc08 "gdbserver: Ensure all
debug output uses debug functions", which replaces calls to write with result
type ssize_t with calls to debug_write with result type size_t.
Fix this by making debug_write return ssize_t.
Build and reg-tested on x86_64-linux.
gdb/gdbserver/ChangeLog:
2019-06-19 Tom de Vries <tdevries@suse.de>
* debug.h (debug_write): Change return type to ssize_t.
* debug.c (debug_write): Same.
142 lines
3.7 KiB
C
142 lines
3.7 KiB
C
/* Debugging routines for the remote server for GDB.
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Copyright (C) 2014-2019 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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FILE *debug_file = stderr;
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/* Enable miscellaneous debugging output. The name is historical - it
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was originally used to debug LinuxThreads support. */
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int 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, 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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/* 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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/* Notify the user that the code is entering FUNCTION_NAME.
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FUNCTION_NAME is the name of the calling function, or NULL if unknown.
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This is intended to be called via the debug_enter macro. */
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void
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do_debug_enter (const char *function_name)
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{
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if (function_name != NULL)
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debug_printf (">>>> entering %s\n", function_name);
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}
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/* Notify the user that the code is exiting FUNCTION_NAME.
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FUNCTION_NAME is the name of the calling function, or NULL if unknown.
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This is intended to be called via the debug_exit macro. */
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void
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do_debug_exit (const char *function_name)
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{
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if (function_name != NULL)
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debug_printf ("<<<< exiting %s\n", function_name);
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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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