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/* Hierarchical log messages for the analyzer.
Copyright (C) 2014-2020 Free Software Foundation, Inc.
Contributed by David Malcolm <dmalcolm@redhat.com>.
This file is part of GCC.
GCC 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, or (at your option)
any later version.
GCC 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 GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
#include "config.h"
#include "system.h"
#include "coretypes.h"
#include "toplev.h" /* for print_version */
#include "pretty-print.h" /* for print_version */
#include "diagnostic.h"
#include "tree-diagnostic.h"
#include "analyzer/analyzer-logging.h"
#if ENABLE_ANALYZER
namespace ana {
/* Implementation of class logger. */
/* ctor for logger. */
logger::logger (FILE *f_out,
int, /* flags */
int /* verbosity */,
const pretty_printer &reference_pp) :
m_refcount (0),
m_f_out (f_out),
m_indent_level (0),
m_log_refcount_changes (false),
m_pp (reference_pp.clone ())
{
pp_show_color (m_pp) = 0;
pp_buffer (m_pp)->stream = f_out;
/* %qE in logs for SSA_NAMEs should show the ssa names, rather than
trying to prettify things by showing the underlying var. */
pp_format_decoder (m_pp) = default_tree_printer;
/* Begin the log by writing the GCC version. */
print_version (f_out, "", false);
}
/* The destructor for logger, invoked via
the decref method when the refcount hits zero.
Note that we do not close the underlying FILE * (m_f_out). */
logger::~logger ()
{
/* This should be the last message emitted. */
log ("%s", __PRETTY_FUNCTION__);
gcc_assert (m_refcount == 0);
delete m_pp;
}
/* Increment the reference count of the logger. */
void
logger::incref (const char *reason)
{
m_refcount++;
if (m_log_refcount_changes)
log ("%s: reason: %s refcount now %i ",
__PRETTY_FUNCTION__, reason, m_refcount);
}
/* Decrement the reference count of the logger,
deleting it if nothing is referring to it. */
void
logger::decref (const char *reason)
{
gcc_assert (m_refcount > 0);
--m_refcount;
if (m_log_refcount_changes)
log ("%s: reason: %s refcount now %i",
__PRETTY_FUNCTION__, reason, m_refcount);
if (m_refcount == 0)
delete this;
}
/* Write a formatted message to the log, by calling the log_va method. */
void
logger::log (const char *fmt, ...)
{
va_list ap;
va_start (ap, fmt);
log_va (fmt, &ap);
va_end (ap);
}
/* Write an indented line to the log file.
We explicitly flush after each line: if something crashes the process,
we want the logfile/stream to contain the most up-to-date hint about the
last thing that was happening, without it being hidden in an in-process
buffer. */
void
logger::log_va (const char *fmt, va_list *ap)
{
start_log_line ();
log_va_partial (fmt, ap);
end_log_line ();
}
void
logger::start_log_line ()
{
for (int i = 0; i < m_indent_level; i++)
fputc (' ', m_f_out);
}
void
logger::log_partial (const char *fmt, ...)
{
va_list ap;
va_start (ap, fmt);
log_va_partial (fmt, &ap);
va_end (ap);
}
void
logger::log_va_partial (const char *fmt, va_list *ap)
{
text_info text;
text.format_spec = fmt;
text.args_ptr = ap;
text.err_no = 0;
pp_format (m_pp, &text);
pp_output_formatted_text (m_pp);
}
void
logger::end_log_line ()
{
pp_flush (m_pp);
pp_clear_output_area (m_pp);
fprintf (m_f_out, "\n");
fflush (m_f_out);
}
/* Record the entry within a particular scope, indenting subsequent
log lines accordingly. */
void
logger::enter_scope (const char *scope_name)
{
log ("entering: %s", scope_name);
m_indent_level += 1;
}
void
logger::enter_scope (const char *scope_name, const char *fmt, va_list *ap)
{
start_log_line ();
log_partial ("entering: %s: ", scope_name);
log_va_partial (fmt, ap);
end_log_line ();
m_indent_level += 1;
}
/* Record the exit from a particular scope, restoring the indent level to
before the scope was entered. */
void
logger::exit_scope (const char *scope_name)
{
if (m_indent_level)
m_indent_level -= 1;
else
log ("(mismatching indentation)");
log ("exiting: %s", scope_name);
}
/* Implementation of class log_user. */
/* The constructor for log_user. */
log_user::log_user (logger *logger) : m_logger (logger)
{
if (m_logger)
m_logger->incref("log_user ctor");
}
/* The destructor for log_user. */
log_user::~log_user ()
{
if (m_logger)
m_logger->decref("log_user dtor");
}
/* Set the logger for a log_user, managing the reference counts
of the old and new logger (either of which might be NULL). */
void
log_user::set_logger (logger *logger)
{
if (logger)
logger->incref ("log_user::set_logger");
if (m_logger)
m_logger->decref ("log_user::set_logger");
m_logger = logger;
}
} // namespace ana
#endif /* #if ENABLE_ANALYZER */
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