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/* Helper class for handling a call with specific arguments.
Copyright (C) 2019-2023 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/>. */
#ifndef GCC_ANALYZER_CALL_DETAILS_H
#define GCC_ANALYZER_CALL_DETAILS_H
namespace ana {
/* Helper class for handling calls to functions with known behavior. */
class call_details
{
public:
call_details (const gcall *call, region_model *model,
region_model_context *ctxt);
call_details (const call_details &cd, region_model_context *ctxt);
region_model *get_model () const { return m_model; }
region_model_manager *get_manager () const;
region_model_context *get_ctxt () const { return m_ctxt; }
logger *get_logger () const;
uncertainty_t *get_uncertainty () const;
tree get_lhs_type () const { return m_lhs_type; }
const region *get_lhs_region () const { return m_lhs_region; }
bool maybe_set_lhs (const svalue *result) const;
void set_any_lhs_with_defaults () const;
unsigned num_args () const;
bool arg_is_pointer_p (unsigned idx) const
{
return POINTER_TYPE_P (get_arg_type (idx));
}
bool arg_is_size_p (unsigned idx) const;
bool arg_is_integral_p (unsigned idx) const
{
return INTEGRAL_TYPE_P (get_arg_type (idx));
}
const gcall *get_call_stmt () const { return m_call; }
location_t get_location () const;
tree get_arg_tree (unsigned idx) const;
tree get_arg_type (unsigned idx) const;
const svalue *get_arg_svalue (unsigned idx) const;
const char *get_arg_string_literal (unsigned idx) const;
tree get_fndecl_for_call () const;
void dump_to_pp (pretty_printer *pp, bool simple) const;
void dump (bool simple) const;
const svalue *get_or_create_conjured_svalue (const region *) const;
tree lookup_function_attribute (const char *attr_name) const;
const svalue *
check_for_null_terminated_string_arg (unsigned arg_idx,
const svalue **out_sval = nullptr) const;
private:
const gcall *m_call;
region_model *m_model;
region_model_context *m_ctxt;
tree m_lhs_type;
const region *m_lhs_region;
};
/* A bundle of information about a problematic argument at a callsite
for use by pending_diagnostic subclasses for reporting and
for deduplication. */
struct call_arg_details
{
public:
call_arg_details (const call_details &cd, unsigned arg_idx)
: m_call (cd.get_call_stmt ()),
m_called_fndecl (cd.get_fndecl_for_call ()),
m_arg_idx (arg_idx),
m_arg_expr (cd.get_arg_tree (arg_idx))
{
}
bool operator== (const call_arg_details &other) const
{
return (m_call == other.m_call
&& m_called_fndecl == other.m_called_fndecl
&& m_arg_idx == other.m_arg_idx
&& pending_diagnostic::same_tree_p (m_arg_expr, other.m_arg_expr));
}
const gcall *m_call;
tree m_called_fndecl;
unsigned m_arg_idx; // 0-based
tree m_arg_expr;
};
} // namespace ana
#endif /* GCC_ANALYZER_CALL_DETAILS_H */
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