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172 lines
4.1 KiB
C++
172 lines
4.1 KiB
C++
/* Internals of libgccjit: logging
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Copyright (C) 2014-2022 Free Software Foundation, Inc.
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Contributed by David Malcolm <dmalcolm@redhat.com>.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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GCC is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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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 GCC; see the file COPYING3. If not see
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<http://www.gnu.org/licenses/>. */
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#include "config.h"
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#include "system.h"
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#include "coretypes.h"
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#include "toplev.h" /* for print_version */
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#include "jit-logging.h"
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namespace gcc {
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namespace jit {
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/* Implementation of class gcc::jit::logger. */
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/* The constructor for gcc::jit::logger, used by
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gcc_jit_context_set_logfile. */
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logger::logger (FILE *f_out,
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int, /* flags */
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int /* verbosity */) :
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m_refcount (0),
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m_f_out (f_out),
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m_indent_level (0),
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m_log_refcount_changes (false)
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{
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/* Begin the log by writing the GCC version. */
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print_version (f_out, "JIT:", false);
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}
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/* The destructor for gcc::jit::logger, invoked via
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the decref method when the refcount hits zero.
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Note that we do not close the underlying FILE * (m_f_out). */
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logger::~logger ()
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{
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/* This should be the last message emitted. */
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log ("%s", __PRETTY_FUNCTION__);
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gcc_assert (m_refcount == 0);
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}
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/* Increment the reference count of the gcc::jit::logger. */
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void
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logger::incref (const char *reason)
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{
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m_refcount++;
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if (m_log_refcount_changes)
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log ("%s: reason: %s refcount now %i ",
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__PRETTY_FUNCTION__, reason, m_refcount);
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}
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/* Decrement the reference count of the gcc::jit::logger,
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deleting it if nothing is referring to it. */
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void
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logger::decref (const char *reason)
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{
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gcc_assert (m_refcount > 0);
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--m_refcount;
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if (m_log_refcount_changes)
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log ("%s: reason: %s refcount now %i",
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__PRETTY_FUNCTION__, reason, m_refcount);
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if (m_refcount == 0)
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delete this;
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}
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/* Write a formatted message to the log, by calling the log_va method. */
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void
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logger::log (const char *fmt, ...)
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{
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va_list ap;
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va_start (ap, fmt);
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log_va (fmt, ap);
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va_end (ap);
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}
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/* Write an indented line to the log file.
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We explicitly flush after each line: if something crashes the process,
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we want the logfile/stream to contain the most up-to-date hint about the
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last thing that was happening, without it being hidden in an in-process
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buffer. */
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void
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logger::log_va (const char *fmt, va_list ap)
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{
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fprintf (m_f_out, "JIT: ");
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for (int i = 0; i < m_indent_level; i++)
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fputc (' ', m_f_out);
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vfprintf (m_f_out, fmt, ap);
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fprintf (m_f_out, "\n");
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fflush (m_f_out);
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}
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/* Record the entry within a particular scope, indenting subsequent
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log lines accordingly. */
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void
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logger::enter_scope (const char *scope_name)
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{
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log ("entering: %s", scope_name);
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m_indent_level += 1;
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}
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/* Record the exit from a particular scope, restoring the indent level to
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before the scope was entered. */
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void
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logger::exit_scope (const char *scope_name)
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{
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if (m_indent_level)
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m_indent_level -= 1;
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else
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log ("(mismatching indentation)");
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log ("exiting: %s", scope_name);
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}
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/* Implementation of class gcc::jit::log_user. */
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/* The constructor for gcc::jit::log_user. */
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log_user::log_user (logger *logger) : m_logger (logger)
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{
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if (m_logger)
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m_logger->incref("log_user ctor");
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}
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/* The destructor for gcc::jit::log_user. */
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log_user::~log_user ()
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{
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if (m_logger)
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m_logger->decref("log_user dtor");
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}
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/* Set the logger for a gcc::jit::log_user, managing the reference counts
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of the old and new logger (either of which might be NULL). */
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void
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log_user::set_logger (logger *logger)
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{
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if (logger)
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logger->incref ("log_user::set_logger");
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if (m_logger)
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m_logger->decref ("log_user::set_logger");
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m_logger = logger;
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}
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} // namespace gcc::jit
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} // namespace gcc
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