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/* Classes for analyzer diagnostics.
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_MEMORY
#define INCLUDE_VECTOR
#include "system.h"
#include "coretypes.h"
#include "tree.h"
#include "intl.h"
#include "diagnostic.h"
#include "analyzer/analyzer.h"
#include "diagnostic-event-id.h"
#include "analyzer/analyzer-logging.h"
#include "analyzer/sm.h"
#include "diagnostic-event-id.h"
#include "analyzer/sm.h"
#include "analyzer/pending-diagnostic.h"
#include "analyzer/diagnostic-manager.h"
#include "analyzer/call-string.h"
#include "analyzer/program-point.h"
#include "analyzer/store.h"
#include "analyzer/region-model.h"
#include "cpplib.h"
#include "digraph.h"
#include "ordered-hash-map.h"
#include "cfg.h"
#include "basic-block.h"
#include "gimple.h"
#include "gimple-iterator.h"
#include "cgraph.h"
#include "analyzer/supergraph.h"
#include "analyzer/program-state.h"
#include "analyzer/exploded-graph.h"
#include "diagnostic-path.h"
#include "analyzer/checker-path.h"
#include "make-unique.h"
#if ENABLE_ANALYZER
namespace ana {
/* struct interesting_t. */
/* Mark the creation of REG as being interesting. */
void
interesting_t::add_region_creation (const region *reg)
{
gcc_assert (reg);
m_region_creation.safe_push (reg);
}
void
interesting_t::dump_to_pp (pretty_printer *pp, bool simple) const
{
pp_string (pp, "{ region creation: [");
unsigned i;
const region *reg;
FOR_EACH_VEC_ELT (m_region_creation, i, reg)
{
if (i > 0)
pp_string (pp, ", ");
reg->dump_to_pp (pp, simple);
}
pp_string (pp, "]}");
}
/* Generate a label_text by printing FMT.
Use a clone of the global_dc for formatting callbacks.
Use this evdesc::event_desc's m_colorize flag to control colorization
(so that e.g. we can disable it for JSON output). */
label_text
evdesc::event_desc::formatted_print (const char *fmt, ...) const
{
pretty_printer *pp = global_dc->printer->clone ();
pp_show_color (pp) = m_colorize;
rich_location rich_loc (line_table, UNKNOWN_LOCATION);
va_list ap;
va_start (ap, fmt);
text_info ti (_(fmt), &ap, 0, nullptr, &rich_loc);
pp_format (pp, &ti);
pp_output_formatted_text (pp);
va_end (ap);
label_text result = label_text::take (xstrdup (pp_formatted_text (pp)));
delete pp;
return result;
}
/* class diagnostic_emission_context. */
/* Get the pending_diagnostic being emitted. */
const pending_diagnostic &
diagnostic_emission_context::get_pending_diagnostic () const
{
return *m_sd.m_d.get ();
}
/* Emit a warning, using the rich_location, metadata, and the
pending_diagnostic's option. */
bool
diagnostic_emission_context::warn (const char *gmsgid, ...)
{
const pending_diagnostic &pd = get_pending_diagnostic ();
auto_diagnostic_group d;
va_list ap;
va_start (ap, gmsgid);
const bool result = emit_diagnostic_valist_meta (DK_WARNING,
&m_rich_loc, &m_metadata,
pd.get_controlling_option (),
gmsgid, &ap);
va_end (ap);
return result;
}
/* Emit a note, using the rich_location and metadata (and the
pending_diagnostic's option). */
void
diagnostic_emission_context::inform (const char *gmsgid, ...)
{
const pending_diagnostic &pd = get_pending_diagnostic ();
auto_diagnostic_group d;
va_list ap;
va_start (ap, gmsgid);
emit_diagnostic_valist_meta (DK_NOTE,
&m_rich_loc, &m_metadata,
pd.get_controlling_option (),
gmsgid, &ap);
va_end (ap);
}
/* Return true if T1 and T2 are "the same" for the purposes of
diagnostic deduplication. */
bool
pending_diagnostic::same_tree_p (tree t1, tree t2)
{
return simple_cst_equal (t1, t2) == 1;
}
/* Return true iff IDENT is STR. */
static bool
ht_ident_eq (ht_identifier ident, const char *str)
{
return (strlen (str) == ident.len
&& 0 == strcmp (str, (const char *)ident.str));
}
/* Return true if we should show the expansion location rather than unwind
within MACRO. */
static bool
fixup_location_in_macro_p (cpp_hashnode *macro)
{
ht_identifier ident = macro->ident;
/* Don't unwind inside "alloca" macro, so that we don't suppress warnings
from it (due to being in system headers). */
if (ht_ident_eq (ident, "alloca"))
return true;
/* Don't unwind inside <stdarg.h> macros, so that we don't suppress warnings
from them (due to being in system headers). */
if (ht_ident_eq (ident, "va_start")
|| ht_ident_eq (ident, "va_copy")
|| ht_ident_eq (ident, "va_arg")
|| ht_ident_eq (ident, "va_end"))
return true;
return false;
}
/* Base implementation of pending_diagnostic::fixup_location.
Don't unwind inside macros for which fixup_location_in_macro_p is true. */
location_t
pending_diagnostic::fixup_location (location_t loc, bool) const
{
if (linemap_location_from_macro_expansion_p (line_table, loc))
{
line_map *map
= const_cast <line_map *> (linemap_lookup (line_table, loc));
const line_map_macro *macro_map = linemap_check_macro (map);
if (fixup_location_in_macro_p (macro_map->macro))
loc = linemap_resolve_location (line_table, loc,
LRK_MACRO_EXPANSION_POINT, NULL);
}
return loc;
}
/* Base implementation of pending_diagnostic::add_function_entry_event.
Add a function_entry_event to EMISSION_PATH. */
void
pending_diagnostic::add_function_entry_event (const exploded_edge &eedge,
checker_path *emission_path)
{
const exploded_node *dst_node = eedge.m_dest;
const program_point &dst_point = dst_node->get_point ();
emission_path->add_event (make_unique<function_entry_event> (dst_point));
}
/* Base implementation of pending_diagnostic::add_call_event.
Add a call_event to EMISSION_PATH. */
void
pending_diagnostic::add_call_event (const exploded_edge &eedge,
checker_path *emission_path)
{
const exploded_node *src_node = eedge.m_src;
const program_point &src_point = src_node->get_point ();
const int src_stack_depth = src_point.get_stack_depth ();
const gimple *last_stmt = src_point.get_supernode ()->get_last_stmt ();
emission_path->add_event
(make_unique<call_event> (eedge,
event_loc_info (last_stmt
? last_stmt->location
: UNKNOWN_LOCATION,
src_point.get_fndecl (),
src_stack_depth)));
}
/* Base implementation of pending_diagnostic::add_region_creation_events.
See the comment for class region_creation_event. */
void
pending_diagnostic::add_region_creation_events (const region *reg,
tree capacity,
const event_loc_info &loc_info,
checker_path &emission_path)
{
emission_path.add_event
(make_unique<region_creation_event_memory_space> (reg->get_memory_space (),
loc_info));
if (capacity)
emission_path.add_event
(make_unique<region_creation_event_capacity> (capacity, loc_info));
}
/* Base implementation of pending_diagnostic::add_final_event.
Add a warning_event to the end of EMISSION_PATH. */
void
pending_diagnostic::add_final_event (const state_machine *sm,
const exploded_node *enode,
const gimple *stmt,
tree var, state_machine::state_t state,
checker_path *emission_path)
{
emission_path->add_event
(make_unique<warning_event>
(event_loc_info (get_stmt_location (stmt, enode->get_function ()),
enode->get_function ()->decl,
enode->get_stack_depth ()),
enode,
sm, var, state));
}
} // namespace ana
#endif /* #if ENABLE_ANALYZER */
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