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/* Helper class for deferring path creation until a diagnostic is emitted.
Copyright (C) 2019-2024 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"
#define INCLUDE_VECTOR
#include "system.h"
#include "coretypes.h"
#include "tree.h"
#include "version.h"
#include "intl.h"
#include "diagnostic.h"
#include "lazy-diagnostic-path.h"
#include "make-unique.h"
#include "selftest.h"
#include "selftest-diagnostic.h"
#include "simple-diagnostic-path.h"
#include "gcc-rich-location.h"
#include "diagnostic-format-text.h"
/* class lazy_diagnostic_path : public diagnostic_path. */
/* Implementation of diagnostic_path vfuncs in terms of a lazily-generated
path. */
unsigned
lazy_diagnostic_path::num_events () const
{
lazily_generate_path ();
return m_inner_path->num_events ();
}
const diagnostic_event &
lazy_diagnostic_path::get_event (int idx) const
{
lazily_generate_path ();
return m_inner_path->get_event (idx);
}
unsigned
lazy_diagnostic_path::num_threads () const
{
lazily_generate_path ();
return m_inner_path->num_threads ();
}
const diagnostic_thread &
lazy_diagnostic_path::get_thread (diagnostic_thread_id_t idx) const
{
lazily_generate_path ();
return m_inner_path->get_thread (idx);
}
bool
lazy_diagnostic_path::same_function_p (int event_idx_a,
int event_idx_b) const
{
lazily_generate_path ();
return m_inner_path->same_function_p (event_idx_a, event_idx_b);
}
void
lazy_diagnostic_path::lazily_generate_path () const
{
if (!m_inner_path)
m_inner_path = make_inner_path ();
gcc_assert (m_inner_path != nullptr);
}
#if CHECKING_P
namespace selftest {
class test_lazy_path : public lazy_diagnostic_path
{
public:
test_lazy_path (pretty_printer &pp)
: m_pp (pp)
{
}
std::unique_ptr<diagnostic_path> make_inner_path () const final override
{
tree fntype_void_void
= build_function_type_array (void_type_node, 0, NULL);
tree fndecl_foo = build_fn_decl ("foo", fntype_void_void);
auto path = ::make_unique<simple_diagnostic_path> (&m_pp);
path->add_event (UNKNOWN_LOCATION, fndecl_foo, 0, "first %qs", "free");
path->add_event (UNKNOWN_LOCATION, fndecl_foo, 0, "double %qs", "free");
return path;
}
private:
pretty_printer &m_pp;
};
static void
test_intraprocedural_path (pretty_printer *event_pp)
{
test_lazy_path path (*event_pp);
ASSERT_FALSE (path.generated_p ());
ASSERT_EQ (path.num_events (), 2);
ASSERT_TRUE (path.generated_p ());
ASSERT_EQ (path.num_threads (), 1);
ASSERT_FALSE (path.interprocedural_p ());
ASSERT_STREQ (path.get_event (0).get_desc (*event_pp).get (),
"first `free'");
ASSERT_STREQ (path.get_event (1).get_desc (*event_pp).get (),
"double `free'");
}
/* Implementation of diagnostic_option_manager for which all
options are disabled, for use in selftests.
Note that this is *not* called for diagnostic_option_id (0), which
means "always warn" */
class all_warnings_disabled : public diagnostic_option_manager
{
public:
int option_enabled_p (diagnostic_option_id) const final override
{
/* Treat all options as disabled. */
return 0;
}
char *make_option_name (diagnostic_option_id,
diagnostic_t,
diagnostic_t) const final override
{
return nullptr;
}
char *make_option_url (diagnostic_option_id) const final override
{
return nullptr;
}
};
static void
test_emission (pretty_printer *event_pp)
{
struct test_rich_location : public gcc_rich_location
{
test_rich_location (pretty_printer &event_pp)
: gcc_rich_location (UNKNOWN_LOCATION),
m_path (event_pp)
{
set_path (&m_path);
}
test_lazy_path m_path;
};
/* Verify that we don't bother generating the inner path if the warning
is skipped. */
{
test_diagnostic_context dc;
dc.set_option_manager (::make_unique<all_warnings_disabled> (), 0);
test_rich_location rich_loc (*event_pp);
ASSERT_FALSE (rich_loc.m_path.generated_p ());
diagnostic_option_id option_id (42); // has to be non-zero
bool emitted
= dc.emit_diagnostic_with_group (DK_WARNING, rich_loc, nullptr,
option_id,
"this warning should be skipped");
ASSERT_FALSE (emitted);
ASSERT_FALSE (rich_loc.m_path.generated_p ());
}
/* Verify that we *do* generate the inner path for a diagnostic that
is emitted, such as an error. */
{
test_diagnostic_context dc;
test_rich_location rich_loc (*event_pp);
ASSERT_FALSE (rich_loc.m_path.generated_p ());
bool emitted
= dc.emit_diagnostic_with_group (DK_ERROR, rich_loc, nullptr, 0,
"this is a test");
ASSERT_TRUE (emitted);
ASSERT_TRUE (rich_loc.m_path.generated_p ());
/* Verify that the path works as expected. */
dc.set_path_format (DPF_INLINE_EVENTS);
diagnostic_text_output_format sink (dc);
pp_buffer (sink.get_printer ())->m_flush_p = false;
sink.print_path (rich_loc.m_path);
ASSERT_STREQ (pp_formatted_text (sink.get_printer ()),
" `foo': event 1\n"
" (1): first `free'\n"
" `foo': event 2\n"
" (2): double `free'\n");
}
}
/* Run all of the selftests within this file. */
void
lazy_diagnostic_path_cc_tests ()
{
/* In a few places we use the global dc's printer to determine
colorization so ensure this off during the tests. */
pretty_printer *global_pp = global_dc->get_reference_printer ();
const bool saved_show_color = pp_show_color (global_pp);
pp_show_color (global_pp) = false;
auto_fix_quotes fix_quotes;
std::unique_ptr<pretty_printer> event_pp
= std::unique_ptr<pretty_printer> (global_pp->clone ());
test_intraprocedural_path (event_pp.get ());
test_emission (event_pp.get ());
pp_show_color (global_pp) = saved_show_color;
}
} // namespace selftest
#endif /* #if CHECKING_P */
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