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/* Generic plugin context
Copyright (C) 2020-2023 Free Software Foundation, Inc.
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 <cc1plugin-config.h>
#undef PACKAGE_NAME
#undef PACKAGE_STRING
#undef PACKAGE_TARNAME
#undef PACKAGE_VERSION
#include "../gcc/config.h"
#undef PACKAGE_NAME
#undef PACKAGE_STRING
#undef PACKAGE_TARNAME
#undef PACKAGE_VERSION
#include "gcc-plugin.h"
#include "system.h"
#include "coretypes.h"
#include "stringpool.h"
#include "hash-set.h"
#include "diagnostic.h"
#include "langhooks.h"
#include "langhooks-def.h"
#include "gcc-interface.h"
#include "context.hh"
#include "marshall.hh"
#ifdef __GNUC__
#pragma GCC visibility push(default)
#endif
int plugin_is_GPL_compatible;
#ifdef __GNUC__
#pragma GCC visibility pop
#endif
cc1_plugin::plugin_context *cc1_plugin::current_context;
// This is put into the lang hooks when the plugin starts.
static void
plugin_print_error_function (diagnostic_context *context, const char *file,
const diagnostic_info *diagnostic)
{
if (current_function_decl != NULL_TREE
&& DECL_NAME (current_function_decl) != NULL_TREE
&& strcmp (IDENTIFIER_POINTER (DECL_NAME (current_function_decl)),
GCC_FE_WRAPPER_FUNCTION) == 0)
return;
lhd_print_error_function (context, file, diagnostic);
}
location_t
cc1_plugin::plugin_context::get_location_t (const char *filename,
unsigned int line_number)
{
if (filename == NULL)
return UNKNOWN_LOCATION;
filename = intern_filename (filename);
linemap_add (line_table, LC_ENTER, false, filename, line_number);
location_t loc = linemap_line_start (line_table, line_number, 0);
linemap_add (line_table, LC_LEAVE, false, NULL, 0);
return loc;
}
// Add a file name to FILE_NAMES and return the canonical copy.
const char *
cc1_plugin::plugin_context::intern_filename (const char *filename)
{
const char **slot = file_names.find_slot (filename, INSERT);
if (*slot == NULL)
{
/* The file name must live as long as the line map, which
effectively means as long as this compilation. So, we copy
the string here but never free it. */
*slot = xstrdup (filename);
}
return *slot;
}
void
cc1_plugin::plugin_context::mark ()
{
for (const auto &item : address_map)
{
ggc_mark (item->decl);
ggc_mark (item->address);
}
for (const auto &item : preserved)
ggc_mark (&item);
}
// Perform GC marking.
static void
gc_mark (void *, void *)
{
if (cc1_plugin::current_context != NULL)
cc1_plugin::current_context->mark ();
}
void
cc1_plugin::generic_plugin_init (struct plugin_name_args *plugin_info,
unsigned int version)
{
long fd = -1;
for (int i = 0; i < plugin_info->argc; ++i)
{
if (strcmp (plugin_info->argv[i].key, "fd") == 0)
{
char *tail;
errno = 0;
fd = strtol (plugin_info->argv[i].value, &tail, 0);
if (*tail != '\0' || errno != 0)
fatal_error (input_location,
"%s: invalid file descriptor argument to plugin",
plugin_info->base_name);
break;
}
}
if (fd == -1)
fatal_error (input_location,
"%s: required plugin argument %<fd%> is missing",
plugin_info->base_name);
current_context = new plugin_context (fd);
// Handshake.
cc1_plugin::protocol_int h_version;
if (!current_context->require ('H')
|| ! ::cc1_plugin::unmarshall (current_context, &h_version))
fatal_error (input_location,
"%s: handshake failed", plugin_info->base_name);
if (h_version != version)
fatal_error (input_location,
"%s: unknown version in handshake", plugin_info->base_name);
register_callback (plugin_info->base_name, PLUGIN_GGC_MARKING,
gc_mark, NULL);
lang_hooks.print_error_function = plugin_print_error_function;
}
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