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// Copyright (C) 2020-2024 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 "rust-borrow-checker.h"
#include "rust-function-collector.h"
#include "rust-bir-fact-collector.h"
#include "rust-bir-builder.h"
#include "rust-bir-dump.h"
#include "polonius/rust-polonius.h"
namespace Rust {
namespace HIR {
void
mkdir_wrapped (const std::string &dirname)
{
int ret;
#ifdef _WIN32
ret = _mkdir (dirname.c_str ());
#elif unix
ret = mkdir (dirname.c_str (), 0775);
#elif __APPLE__
ret = mkdir (dirname.c_str (), 0775);
#endif
rust_assert (ret == 0 || errno == EEXIST);
}
void
dump_function_bir (const std::string &filename, BIR::Function &func,
const std::string &name)
{
std::ofstream file;
file.open (filename);
if (file.fail ())
{
rust_error_at (UNKNOWN_LOCATION, "Failed to open file %s",
filename.c_str ());
return;
}
BIR::Dump (file, func, name).go ();
file.close ();
}
void
BorrowChecker::go (HIR::Crate &crate)
{
std::string crate_name;
if (enable_dump_bir)
{
mkdir_wrapped ("bir_dump");
auto &mappings = Analysis::Mappings::get ();
bool ok = mappings.get_crate_name (crate.get_mappings ().get_crate_num (),
crate_name);
rust_assert (ok);
mkdir_wrapped ("nll_facts_gccrs");
}
FunctionCollector collector;
collector.go (crate);
for (auto func : collector.get_functions ())
{
rust_debug_loc (func->get_locus (), "\nChecking function %s\n",
func->get_function_name ().as_string ().c_str ());
BIR::BuilderContext ctx;
BIR::Builder builder (ctx);
auto bir = builder.build (*func);
if (enable_dump_bir)
{
std::string filename = "bir_dump/" + crate_name + "."
+ func->get_function_name ().as_string ()
+ ".bir.dump";
dump_function_bir (filename, bir,
func->get_function_name ().as_string ());
}
auto facts = BIR::FactCollector::collect (bir);
if (enable_dump_bir)
{
mkdir_wrapped ("nll_facts_gccrs/"
+ func->get_function_name ().as_string ());
auto dump_facts_to_file
= [&] (const std::string &suffix,
void (Polonius::Facts::*fn) (std::ostream &) const) {
std::string filename = "nll_facts_gccrs/"
+ func->get_function_name ().as_string ()
+ "/" + suffix + ".facts";
std::ofstream file;
file.open (filename);
if (file.fail ())
{
abort ();
}
// Run dump
// BEWARE: this callback charade is a workaround because gcc48
// won't let me return a file from a function
(facts.*fn) (file);
};
dump_facts_to_file ("loan_issued_at",
&Polonius::Facts::dump_loan_issued_at);
dump_facts_to_file ("loan_killed_at",
&Polonius::Facts::dump_loan_killed_at);
dump_facts_to_file ("loan_invalidated_at",
&Polonius::Facts::dump_loan_invalidated_at);
dump_facts_to_file ("subset_base",
&Polonius::Facts::dump_subset_base);
dump_facts_to_file ("universal_region",
&Polonius::Facts::dump_universal_region);
dump_facts_to_file ("cfg_edge", &Polonius::Facts::dump_cfg_edge);
dump_facts_to_file ("var_used_at",
&Polonius::Facts::dump_var_used_at);
dump_facts_to_file ("var_defined_at",
&Polonius::Facts::dump_var_defined_at);
dump_facts_to_file ("var_dropped_at",
&Polonius::Facts::dump_var_dropped_at);
dump_facts_to_file ("use_of_var_derefs_origin",
&Polonius::Facts::dump_use_of_var_derefs_origin);
dump_facts_to_file ("drop_of_var_derefs_origin",
&Polonius::Facts::dump_drop_of_var_derefs_origin);
dump_facts_to_file ("child_path", &Polonius::Facts::dump_child_path);
dump_facts_to_file ("path_is_var",
&Polonius::Facts::dump_path_is_var);
dump_facts_to_file ("known_placeholder_subset",
&Polonius::Facts::dump_known_placeholder_subset);
dump_facts_to_file ("path_moved_at_base",
&Polonius::Facts::dump_path_moved_at_base);
dump_facts_to_file ("path_accessed_at_base",
&Polonius::Facts::dump_path_accessed_at_base);
dump_facts_to_file ("path_assigned_at_base",
&Polonius::Facts::dump_path_assigned_at_base);
dump_facts_to_file ("placeholder",
&Polonius::Facts::dump_placeholder);
}
auto result
= Polonius::polonius_run (facts.freeze (), rust_be_debug_p ());
if (result.loan_errors)
{
rust_error_at (func->get_locus (), "Found loan errors in function %s",
func->get_function_name ().as_string ().c_str ());
}
if (result.subset_errors)
{
rust_error_at (func->get_locus (),
"Found subset errors in function %s. Some lifetime "
"constraints need to be added.",
func->get_function_name ().as_string ().c_str ());
}
if (result.move_errors)
{
rust_error_at (func->get_locus (), "Found move errors in function %s",
func->get_function_name ().as_string ().c_str ());
}
}
for (auto closure ATTRIBUTE_UNUSED : collector.get_closures ())
rust_sorry_at (closure->get_locus (),
"Closure borrow checking is not implemented yet.");
}
} // namespace HIR
} // namespace Rust
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