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Type.cpp
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Type.cpp
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// -*- mode: C++ -*-
//
// Copyright (c) 2007, 2008, 2010, 2011 The University of Utah
// All rights reserved.
//
// This file is part of `csmith', a random generator of C programs.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
//
// * Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//
// This file was derived from a random program generator written by Bryan
// Turner. The attributions in that file was:
//
// Random Program Generator
// Bryan Turner (bryan.turner@pobox.com)
// July, 2005
//
#include "Type.h"
#include <sstream>
#include <assert.h>
#include <math.h>
#include "Common.h"
#include "CGOptions.h"
#include "random.h"
#include "Filter.h"
#include "Error.h"
#include "util.h"
#include "Bookkeeper.h"
#include "Probabilities.h"
#include "DepthSpec.h"
#include "Enumerator.h"
using namespace std;
///////////////////////////////////////////////////////////////////////////////
/*
*
*/
const Type *Type::simple_types[MAX_SIMPLE_TYPES];
Type *Type::void_type = NULL;
// ---------------------------------------------------------------------
// List of all types used in the program
static vector<Type *> AllTypes;
static vector<Type *> derived_types;
//////////////////////////////////////////////////////////////////////
class NonVoidTypeFilter : public Filter
{
public:
NonVoidTypeFilter();
virtual ~NonVoidTypeFilter();
virtual bool filter(int v) const;
Type *get_type();
private:
mutable Type *typ_;
};
NonVoidTypeFilter::NonVoidTypeFilter()
: typ_(NULL)
{
}
NonVoidTypeFilter::~NonVoidTypeFilter()
{
}
bool
NonVoidTypeFilter::filter(int v) const
{
assert(static_cast<unsigned int>(v) < AllTypes.size());
Type *type = AllTypes[v];
if (type->eType == eSimple && type->simple_type == eVoid)
return true;
if (!type->used) {
Bookkeeper::record_type_with_bitfields(type);
type->used = true;
}
typ_ = type;
if (type->eType == eSimple) {
Filter *filter = SIMPLE_TYPES_PROB_FILTER;
return filter->filter(typ_->simple_type);
}
return false;
}
Type *
NonVoidTypeFilter::get_type()
{
assert(typ_);
return typ_;
}
class NonVoidNonVolatileTypeFilter : public Filter
{
public:
NonVoidNonVolatileTypeFilter();
virtual ~NonVoidNonVolatileTypeFilter();
virtual bool filter(int v) const;
Type *get_type();
private:
mutable Type *typ_;
};
NonVoidNonVolatileTypeFilter::NonVoidNonVolatileTypeFilter()
: typ_(NULL)
{
}
NonVoidNonVolatileTypeFilter::~NonVoidNonVolatileTypeFilter()
{
}
bool
NonVoidNonVolatileTypeFilter::filter(int v) const
{
assert(static_cast<unsigned int>(v) < AllTypes.size());
Type *type = AllTypes[v];
if (type->eType == eSimple && type->simple_type == eVoid)
return true;
if (type->is_aggregate() && type->is_volatile_struct_union())
return true;
if ((type->eType == eStruct) && (!CGOptions::arg_structs())) {
return true;
}
if ((type->eType == eUnion) && (!CGOptions::arg_unions())) {
return true;
}
if (!type->used) {
Bookkeeper::record_type_with_bitfields(type);
type->used = true;
}
typ_ = type;
if (type->eType == eSimple) {
Filter *filter = SIMPLE_TYPES_PROB_FILTER;
return filter->filter(typ_->simple_type);
}
return false;
}
Type *
NonVoidNonVolatileTypeFilter::get_type()
{
assert(typ_);
return typ_;
}
class ChooseRandomTypeFilter : public Filter
{
public:
ChooseRandomTypeFilter(bool for_field_var=false);
virtual ~ChooseRandomTypeFilter();
virtual bool filter(int v) const;
Type *get_type();
bool for_field_var;
private:
mutable Type *typ_;
};
ChooseRandomTypeFilter::ChooseRandomTypeFilter(bool for_field_var)
: for_field_var(for_field_var)
{
}
ChooseRandomTypeFilter::~ChooseRandomTypeFilter()
{
}
bool
ChooseRandomTypeFilter::filter(int v) const
{
assert((v >= 0) && (static_cast<unsigned int>(v) < AllTypes.size()));
typ_ = AllTypes[v];
assert(typ_);
if (typ_->eType == eSimple) {
Filter *filter = SIMPLE_TYPES_PROB_FILTER;
return filter->filter(typ_->simple_type);
}
else if ((typ_->eType == eStruct) && (!CGOptions::return_structs())) {
return true;
}
if (for_field_var && typ_->get_struct_depth() >= CGOptions::max_nested_struct_level()) {
return true;
}
return false;
}
Type *
ChooseRandomTypeFilter::get_type()
{
assert(typ_);
return typ_;
}
///////////////////////////////////////////////////////////////////////////////
// --------------------------------------------------------------
/* constructor for simple types
********************************************************/
Type::Type(eSimpleType simple_type) :
eType(eSimple),
ptr_type(0),
simple_type(simple_type),
used(false),
printed(false),
packed_(false)
{
// Nothing else to do.
}
// --------------------------------------------------------------
/* copy constructor
*******************************************************/
#if 0
Type::Type(const Type &t) :
eType(t.eType),
ptr_type(t.ptr_type),
simple_type(t.simple_type),
dimensions(t.dimensions),
fields(t.fields),
used(t.used),
printed(t.printed)
{
// Nothing else to do.
}
#endif
// --------------------------------------------------------------
/* constructor for struct or union types
*******************************************************/
Type::Type(vector<const Type*>& struct_fields, bool isStruct, bool packed,
vector<CVQualifiers> &qfers, vector<int> &fields_length) :
ptr_type(0),
fields(struct_fields),
used(false),
printed(false),
packed_(packed),
qfers_(qfers),
bitfields_length_(fields_length)
{
static unsigned int sequence = 0;
if (isStruct)
eType = eStruct;
else
eType = eUnion;
sid = sequence++;
}
// --------------------------------------------------------------
/* constructor for pointers
*******************************************************/
Type::Type(const Type* t) :
eType(ePointer),
ptr_type(t),
used(false),
printed(false),
packed_(false)
{
// Nothing else to do.
}
// --------------------------------------------------------------
Type::~Type(void)
{
// Nothing to do.
}
// --------------------------------------------------------------
#if 0
Type &
Type::operator=(const Type& t)
{
if (this == &t) {
return *this;
}
eType = t.eType;
simple_type = t.simple_type;
dimensions = t.dimensions;
fields = t.fields;
return *this;
}
#endif
// ---------------------------------------------------------------------
const Type &
Type::get_simple_type(eSimpleType st)
{
static bool inited = false;
if (!inited) {
for (int i = 0; i < MAX_SIMPLE_TYPES; ++i) {
Type::simple_types[i] = 0;
}
inited = true;
}
if (Type::simple_types[st] == 0) {
// find if type is in the allTypes already (most likely only "eVoid" is not there)
for (size_t i=0; i<AllTypes.size(); i++) {
Type* tt = AllTypes[i];
if (tt->eType == eSimple && tt->simple_type == st) {
Type::simple_types[st] = tt;
}
}
if (Type::simple_types[st] == 0) {
Type *t = new Type(st);
Type::simple_types[st] = t;
AllTypes.push_back(t);
}
}
return *Type::simple_types[st];
}
// ---------------------------------------------------------------------
/* return the most commonly used type - integer
*************************************************************/
const Type *
get_int_type()
{
return &Type::get_simple_type(eInt);
}
Type*
Type::find_type(const Type* t)
{
for (size_t i=0; i<AllTypes.size(); i++) {
if (AllTypes[i] == t) {
return AllTypes[i];
}
}
return 0;
}
// ---------------------------------------------------------------------
/* find the pointer type to the given type in existing types,
* return 0 if not found
*************************************************************/
Type*
Type::find_pointer_type(const Type* t, bool add)
{
for (size_t i=0; i<derived_types.size(); i++) {
if (derived_types[i]->ptr_type == t) {
return derived_types[i];
}
}
if (add) {
Type* ptr_type = new Type(t);
derived_types.push_back(ptr_type);
return ptr_type;
}
return 0;
}
bool
Type::is_const_struct_union() const
{
if (!is_aggregate()) return false;
assert(fields.size() == qfers_.size());
for (size_t i = 0; i < fields.size(); ++i) {
const Type *field = fields[i];
if (field->is_const_struct_union()) {
return true;
}
const CVQualifiers& cf = qfers_[i];
if (cf.is_const()) return true;
}
return false;
}
bool
Type::is_volatile_struct_union() const
{
if (!is_aggregate()) return false;
assert(fields.size() == qfers_.size());
for (size_t i = 0; i < fields.size(); ++i) {
const Type *field = fields[i];
if (field->is_volatile_struct_union()) {
return true;
}
const CVQualifiers& cf = qfers_[i];
if (cf.is_volatile())
return true;
}
return false;
}
bool
Type::has_int_field() const
{
if (is_int()) return true;
for (size_t i=0; i<fields.size(); ++i) {
const Type* t = fields[i];
if (t->has_int_field()) return true;
}
return false;
}
bool
Type::signed_overflow_possible() const
{
return eType == eSimple && is_signed() && ((int)SizeInBytes()) >= CGOptions::int_bytes();
}
void
Type::get_all_ok_struct_union_types(vector<Type *> &ok_types, bool no_const, bool no_volatile, bool need_int_field, bool bStruct)
{
vector<Type *>::iterator i;
for(i = AllTypes.begin(); i != AllTypes.end(); ++i) {
Type* t = (*i);
if (bStruct && t->eType != eStruct) continue;
if (!bStruct && t->eType != eUnion) continue;
if ((no_const && t->is_const_struct_union()) ||
(no_volatile && t->is_volatile_struct_union()) ||
(need_int_field && (!t->has_int_field()))) {
continue;
}
ok_types.push_back(t);
}
}
const Type*
Type::choose_random_struct_union_type(vector<Type *> &ok_types)
{
size_t sz = ok_types.size();
assert(sz > 0);
int index = rnd_upto(ok_types.size());
ERROR_GUARD(0);
assert(index >= 0);
Type *rv_type = ok_types[index];
if (!rv_type->used) {
Bookkeeper::record_type_with_bitfields(rv_type);
rv_type->used = true;
}
return rv_type;
}
const Type*
Type::choose_random_pointer_type(void)
{
unsigned int index = rnd_upto(derived_types.size());
ERROR_GUARD(NULL);
return derived_types[index];
}
bool
Type::has_pointer_type(void)
{
return derived_types.size() > 0;
}
/* for exhaustive mode only */
const Type*
Type::choose_random_struct_from_type(const Type* type, bool no_volatile)
{
if (!type)
return NULL;
const Type* t = type;
vector<Type *> ok_struct_types;
get_all_ok_struct_union_types(ok_struct_types, no_volatile, false, true, true);
if (ok_struct_types.size() > 0) {
DEPTH_GUARD_BY_DEPTH_RETURN(1, NULL);
t = Type::choose_random_struct_union_type(ok_struct_types);
ERROR_GUARD(NULL);
}
return t;
}
const Type*
Type::random_type_from_type(const Type* type, bool no_volatile, bool strict_simple_type)
{
const Type* t = type;
DEPTH_GUARD_BY_TYPE_RETURN(dtRandomTypeFromType, NULL);
if (type == 0) {
t = no_volatile ? choose_random_nonvoid_nonvolatile() : choose_random_nonvoid();
ERROR_GUARD(NULL);
}
if (type->eType == eSimple && !strict_simple_type) {
t = choose_random_simple();
ERROR_GUARD(NULL);
}
if (t->eType == eSimple) {
assert(t->simple_type != eVoid);
}
return t;
}
// ---------------------------------------------------------------------
static bool
MoreTypesProbability(void)
{
// Always have at least 10 types in the program.
if (AllTypes.size() < 10)
return true;
// by default 50% probability for each additional struct or union type.
return rnd_flipcoin(MoreStructUnionTypeProb);
}
// ---------------------------------------------------------------------
eSimpleType
Type::choose_random_nonvoid_simple(void)
{
eSimpleType simple_type;
#if 0
vector<unsigned int> vs;
vs.push_back(eVoid);
if (!CGOptions::allow_int64()) {
vs.push_back(eLongLong);
vs.push_back(eULongLong);
}
VectorFilter filter(vs);
#endif
simple_type = (eSimpleType) rnd_upto(MAX_SIMPLE_TYPES, SIMPLE_TYPES_PROB_FILTER);
return simple_type;
}
void
Type::make_one_bitfield(vector<const Type*> &random_fields, vector<CVQualifiers> &qualifiers, vector<int> &fields_length)
{
int max_length = CGOptions::bitfields_length();
bool sign = rnd_flipcoin(BitFieldsSignedProb);
ERROR_RETURN();
const Type *type = sign ? &Type::get_simple_type(eInt) : &Type::get_simple_type(eUInt);
random_fields.push_back(type);
CVQualifiers qual = CVQualifiers::random_qualifiers(type, FieldConstProb, FieldVolatileProb);
ERROR_RETURN();
qualifiers.push_back(qual);
int length = rnd_upto(max_length);
ERROR_RETURN();
bool no_zero_len = fields_length.empty() || (fields_length.back() == 0);
// force length to be non-zero is required
if (length == 0 && no_zero_len) {
if (max_length <= 2) length = 1;
else length = rnd_upto(max_length - 1) + 1;
}
ERROR_RETURN();
fields_length.push_back(length);
}
// ---------------------------------------------------------------------
void
Type::make_full_bitfields_struct_fields(size_t field_cnt, vector<const Type*> &random_fields,
vector<CVQualifiers> &qualifiers,
vector<int> &fields_length)
{
for (size_t i=0; i<field_cnt; i++) {
bool is_non_bitfield = rnd_flipcoin(ScalarFieldInFullBitFieldsProb);
if (is_non_bitfield) {
make_one_struct_field(random_fields, qualifiers, fields_length);
}
else {
make_one_bitfield(random_fields, qualifiers, fields_length);
}
}
}
void
Type::make_one_struct_field(vector<const Type*> &random_fields,
vector<CVQualifiers> &qualifiers,
vector<int> &fields_length)
{
ChooseRandomTypeFilter f(true);
unsigned int i = rnd_upto(AllTypes.size(), &f);
ERROR_RETURN();
const Type* type = AllTypes[i];
random_fields.push_back(type);
CVQualifiers qual = CVQualifiers::random_qualifiers(type, FieldConstProb, FieldVolatileProb);
ERROR_RETURN();
qualifiers.push_back(qual);
fields_length.push_back(-1);
}
void
Type::make_one_union_field(vector<const Type*> &fields, vector<CVQualifiers> &qfers, vector<int> &lens)
{
bool is_bitfield = CGOptions::bitfields() && rnd_flipcoin(BitFieldInNormalStructProb);
if (is_bitfield) {
make_one_bitfield(fields, qfers, lens);
}
else {
vector<Type*> ok_types = AllTypes;
// find locations of struct types
int start_index = -1;
int end_index = -1;
for (size_t i=0; i<ok_types.size(); i++) {
if (ok_types[i]->eType == eStruct) {
if (start_index == -1) start_index = i;
end_index = i;
}
}
const Type* type = NULL;
do {
// 10% chance to be struct field
if (start_index != -1 && pure_rnd_flipcoin(10)) {
type = ok_types[start_index + pure_rnd_upto(end_index - start_index + 1)];
assert(type->eType == eStruct);
}
// 10% chance to be char* if pointer is allowed
else if (CGOptions::pointers() && pure_rnd_flipcoin(10)) {
type = find_pointer_type(&get_simple_type(eChar), true);
}
else {
unsigned int i = pure_rnd_upto(ok_types.size());
const Type* t = ok_types[i];
// no union in union?
if (t->eType == eUnion ||
(t->eType == eSimple && SIMPLE_TYPES_PROB_FILTER->filter(t->simple_type))) {
continue;
}
type = t;
}
} while (type == NULL);
fields.push_back(type);
CVQualifiers qual = CVQualifiers::random_qualifiers(type, FieldConstProb, FieldVolatileProb);
ERROR_RETURN();
qfers.push_back(qual);
lens.push_back(-1);
}
}
void
Type::make_normal_struct_fields(size_t field_cnt, vector<const Type*> &random_fields,
vector<CVQualifiers> &qualifiers,
vector<int> &fields_length)
{
for (size_t i=0; i<field_cnt; i++)
{
bool is_bitfield = CGOptions::bitfields() && rnd_flipcoin(BitFieldInNormalStructProb);
if (is_bitfield) {
make_one_bitfield(random_fields, qualifiers, fields_length);
}
else {
make_one_struct_field(random_fields, qualifiers, fields_length);
}
}
}
#define ZERO_BITFIELD 0
#define RANDOM_BITFIELD 1
//#define MAX_BITFIELD 2
#define ENUM_BITFIELD_SIZE 2
void
Type::init_is_bitfield_enumerator(Enumerator<string> &enumerator, int bitfield_prob)
{
int field_cnt = CGOptions::max_struct_fields();
for (int i = 0; i < field_cnt; ++i) {
std::ostringstream ss;
ss << "bitfield" << i;
if (CGOptions::bitfields()) {
enumerator.add_bool_elem(ss.str(), bitfield_prob);
}
else {
enumerator.add_bool_elem(ss.str(), 0);
}
}
}
void
Type::init_fields_enumerator(Enumerator<string> &enumerator,
Enumerator<string> &bitfield_enumerator,
int type_bound, int qual_bound,
int bitfield_qual_bound)
{
int field_cnt = CGOptions::max_struct_fields();
for (int i = 0; i < field_cnt; ++i) {
std::ostringstream ss;
ss << "bitfield" << i;
bool is_bitfield = bitfield_enumerator.get_elem(ss.str());
if (is_bitfield) {
std::ostringstream ss1, ss2, ss3;
ss1 << "bitfield_sign" << i;
ss2 << "bitfield_qualifier" << i;
ss3 << "bitfield_length" << i;
enumerator.add_bool_elem_of_bool(ss1.str(), false);
enumerator.add_elem(ss2.str(), bitfield_qual_bound);
enumerator.add_elem(ss3.str(), ENUM_BITFIELD_SIZE);
}
else {
std::ostringstream ss1, ss2;
ss1 << "field" << i;
ss2 << "qualifier" << i;
enumerator.add_elem(ss1.str(), type_bound);
enumerator.add_elem(ss2.str(), qual_bound);
}
}
enumerator.add_bool_elem_of_bool("packed", CGOptions::packed_struct());
}
int
Type::get_bitfield_length(int length_flag)
{
int max_length = CGOptions::bitfields_length();
assert(max_length > 0);
int length;
switch (length_flag) {
case ZERO_BITFIELD:
length = 0;
break;
#if 0
case MAX_BITFIELD:
length = max_length;
break;
#endif
case RANDOM_BITFIELD:
length = pure_rnd_upto(max_length);
break;
default:
assert(0);
break;
}
return length;
}
bool
Type::make_one_bitfield_by_enum(Enumerator<string> &enumerator,
vector<CVQualifiers> &all_bitfield_quals,
vector<const Type*> &random_fields,
vector<CVQualifiers> &qualifiers,
vector<int> &fields_length,
int index, bool &last_is_zero)
{
std::ostringstream ss1, ss2, ss3;
ss1 << "bitfield_sign" << index;
ss2 << "bitfield_qualifier" << index;
ss3 << "bitfield_length" << index;
bool sign = enumerator.get_elem(ss1.str());
// we cannot allow too many structs,
// so randomly choose the sign of fields.
if (pure_rnd_flipcoin(50))
sign = true;
const Type *type = sign ? &Type::get_simple_type(eInt) : &Type::get_simple_type(eUInt);
random_fields.push_back(type);
int qual_index = enumerator.get_elem(ss2.str());
assert((qual_index >= 0) && ((static_cast<unsigned int>(qual_index)) < all_bitfield_quals.size()));
CVQualifiers qual = all_bitfield_quals[qual_index];
qualifiers.push_back(qual);
int length_flag = enumerator.get_elem(ss3.str());
int length = get_bitfield_length(length_flag);
if ((index==0 || last_is_zero) && (length == 0)) {
return false;
}
last_is_zero = (length == 0) ? true : false;
fields_length.push_back(length);
return true;
}
bool
Type::make_one_normal_field_by_enum(Enumerator<string> &enumerator, vector<const Type*> &all_types,
vector<CVQualifiers> &all_quals, vector<const Type*> &fields,
vector<CVQualifiers> &quals, vector<int> &fields_length, int i)
{
int types_size = all_types.size();
int quals_size = all_quals.size();
Filter *filter = SIMPLE_TYPES_PROB_FILTER;
std::ostringstream ss1, ss2;
ss1 << "field" << i;
int typ_index = enumerator.get_elem(ss1.str());
assert(typ_index >= 0 && typ_index < types_size);
Type *typ = const_cast<Type*>(all_types[typ_index]);
if (typ->eType == eSimple) {
assert(typ->simple_type != eVoid);
if (filter->filter(typ->simple_type))
return false;
}
assert(typ != NULL);
fields.push_back(typ);
ss2 << "qualifier" << i;
int qual_index = enumerator.get_elem(ss2.str());
assert(qual_index >= 0 && qual_index < quals_size);
CVQualifiers qual = all_quals[qual_index];
quals.push_back(qual);
fields_length.push_back(-1);
return true;
}
void
Type::make_all_struct_types_(Enumerator<string> &bitfields_enumerator, vector<const Type*> &accum_types,
vector<const Type*> &all_types, vector<CVQualifiers> &all_quals,
vector<CVQualifiers> &all_bitfield_quals)
{
Enumerator<string> fields_enumerator;
init_fields_enumerator(fields_enumerator, bitfields_enumerator, all_types.size(),
all_quals.size(), all_bitfield_quals.size());
Enumerator<string> *i;
for (i = fields_enumerator.begin(); i != fields_enumerator.end(); i = i->next()) {
make_all_struct_types_with_bitfields(*i, bitfields_enumerator, accum_types, all_types, all_quals, all_bitfield_quals);
}
}
void
Type::make_all_struct_types_with_bitfields(Enumerator<string> &enumerator,
Enumerator<string> &bitfields_enumerator, vector<const Type*> &accum_types,
vector<const Type*> &all_types, vector<CVQualifiers> &all_quals,
vector<CVQualifiers> &all_bitfield_quals)
{
vector<const Type*> fields;
vector<CVQualifiers> quals;
vector<int> fields_length;
int field_cnt = CGOptions::max_struct_fields();
bool last_is_zero = false;
int bitfields_cnt = 0;
int normal_fields_cnt = 0;
for (int i = 0; i < field_cnt; ++i) {
std::ostringstream ss;
ss << "bitfield" << i;
bool is_bitfield = bitfields_enumerator.get_elem(ss.str());
bool rv = false;
if (is_bitfield) {
rv = make_one_bitfield_by_enum(enumerator, all_bitfield_quals, fields, quals, fields_length, i, last_is_zero);
bitfields_cnt++;
}
else {
rv = make_one_normal_field_by_enum(enumerator, all_types, all_quals, fields, quals, fields_length, i);
last_is_zero = rv ? false : last_is_zero;
normal_fields_cnt++;
}
if (!rv)
return;
}
if ((ExhaustiveBitFieldsProb > 0) && (ExhaustiveBitFieldsProb < 100) &&
((bitfields_cnt == field_cnt) || (normal_fields_cnt == field_cnt)))
return;
bool packed = enumerator.get_elem("packed");
Type* new_type = new Type(fields, true, packed, quals, fields_length);
new_type->used = true;
accum_types.push_back(new_type);
}
/*
* level control's the nested level of struct
*/
void
Type::copy_all_fields_types(vector<const Type*> &dest_types, vector<const Type*> &src_types)
{
vector<const Type*>::const_iterator i;
for (i = src_types.begin(); i != src_types.end(); ++i)
dest_types.push_back(*i);
}
void
Type::reset_accum_types(vector<const Type*> &accum_types)
{
accum_types.clear();
vector<Type*>::const_iterator i;
for (i = AllTypes.begin(); i != AllTypes.end(); ++i)
accum_types.push_back(*i);
}
void
Type::delete_useless_structs(vector<const Type*> &all_types, vector<const Type*> &accum_types)
{
assert(all_types.size() <= accum_types.size());
for (size_t i = 0; i < all_types.size(); ++i) {
const Type *t = all_types[i];
if (t->eType == eStruct) {
const Type *t1 = accum_types[i];
delete t1;
accum_types[i] = t;
}
}
}
void
Type::make_all_struct_types(int level, vector<const Type*> &accum_types)
{
if (level > 0) {
make_all_struct_types(level - 1, accum_types);
}
vector<const Type*> all_types;
copy_all_fields_types(all_types, accum_types);
reset_accum_types(accum_types);
vector<CVQualifiers> all_quals;
CVQualifiers::get_all_qualifiers(all_quals, RegularConstProb, RegularVolatileProb);
vector<CVQualifiers> all_bitfield_quals;
CVQualifiers::get_all_qualifiers(all_bitfield_quals, FieldConstProb, FieldVolatileProb);
Enumerator<string> fields_enumerator;
init_is_bitfield_enumerator(fields_enumerator, ExhaustiveBitFieldsProb);
Enumerator<string> *i;
for (i = fields_enumerator.begin(); i != fields_enumerator.end(); i = i->next()) {
make_all_struct_types_(*i, accum_types, all_types, all_quals, all_bitfield_quals);
}
delete_useless_structs(all_types, accum_types);
}
void
Type::make_all_struct_union_types(void)
{
int level = CGOptions::max_nested_struct_level();
if (CGOptions::dfs_exhaustive()) {
vector<const Type*> accum_types;
reset_accum_types(accum_types);
make_all_struct_types(level, accum_types);
assert(accum_types.size() >= AllTypes.size());
for (size_t i = AllTypes.size(); i < accum_types.size(); ++i)
AllTypes.push_back(const_cast<Type*>(accum_types[i]));
}
}
Type*
Type::make_random_struct_type(void)
{
size_t field_cnt = 0;
size_t max_cnt = CGOptions::max_struct_fields();
if (CGOptions::fixed_struct_fields())
field_cnt = max_cnt;
else
field_cnt = rnd_upto(max_cnt) + 1;
ERROR_GUARD(NULL);
vector<const Type*> random_fields;
vector<CVQualifiers> qualifiers;
vector<int> fields_length;
bool is_bitfields = CGOptions::bitfields() && rnd_flipcoin(BitFieldsCreationProb);
ERROR_GUARD(NULL);
//if (CGOptions::bitfields())
if (is_bitfields)
make_full_bitfields_struct_fields(field_cnt, random_fields, qualifiers, fields_length);