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/*******************************************************************************
*
* Tests for pointer::ConstraintSystem
*
* Author: Maxime Arthaud
*
* Contact: ikos@lists.nasa.gov
*
* Notices:
*
* Copyright (c) 2018-2019 United States Government as represented by the
* Administrator of the National Aeronautics and Space Administration.
* All Rights Reserved.
*
* Disclaimers:
*
* No Warranty: THE SUBJECT SOFTWARE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY OF
* ANY KIND, EITHER EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING, BUT NOT LIMITED
* TO, ANY WARRANTY THAT THE SUBJECT SOFTWARE WILL CONFORM TO SPECIFICATIONS,
* ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE,
* OR FREEDOM FROM INFRINGEMENT, ANY WARRANTY THAT THE SUBJECT SOFTWARE WILL BE
* ERROR FREE, OR ANY WARRANTY THAT DOCUMENTATION, IF PROVIDED, WILL CONFORM TO
* THE SUBJECT SOFTWARE. THIS AGREEMENT DOES NOT, IN ANY MANNER, CONSTITUTE AN
* ENDORSEMENT BY GOVERNMENT AGENCY OR ANY PRIOR RECIPIENT OF ANY RESULTS,
* RESULTING DESIGNS, HARDWARE, SOFTWARE PRODUCTS OR ANY OTHER APPLICATIONS
* RESULTING FROM USE OF THE SUBJECT SOFTWARE. FURTHER, GOVERNMENT AGENCY
* DISCLAIMS ALL WARRANTIES AND LIABILITIES REGARDING THIRD-PARTY SOFTWARE,
* IF PRESENT IN THE ORIGINAL SOFTWARE, AND DISTRIBUTES IT "AS IS."
*
* Waiver and Indemnity: RECIPIENT AGREES TO WAIVE ANY AND ALL CLAIMS AGAINST
* THE UNITED STATES GOVERNMENT, ITS CONTRACTORS AND SUBCONTRACTORS, AS WELL
* AS ANY PRIOR RECIPIENT. IF RECIPIENT'S USE OF THE SUBJECT SOFTWARE RESULTS
* IN ANY LIABILITIES, DEMANDS, DAMAGES, EXPENSES OR LOSSES ARISING FROM SUCH
* USE, INCLUDING ANY DAMAGES FROM PRODUCTS BASED ON, OR RESULTING FROM,
* RECIPIENT'S USE OF THE SUBJECT SOFTWARE, RECIPIENT SHALL INDEMNIFY AND HOLD
* HARMLESS THE UNITED STATES GOVERNMENT, ITS CONTRACTORS AND SUBCONTRACTORS,
* AS WELL AS ANY PRIOR RECIPIENT, TO THE EXTENT PERMITTED BY LAW.
* RECIPIENT'S SOLE REMEDY FOR ANY SUCH MATTER SHALL BE THE IMMEDIATE,
* UNILATERAL TERMINATION OF THIS AGREEMENT.
*
******************************************************************************/
#define BOOST_TEST_MODULE test_pointer_solver
#define BOOST_TEST_DYN_LINK
#include <boost/mpl/list.hpp>
#include <boost/test/unit_test.hpp>
#include <ikos/core/domain/pointer/solver.hpp>
#include <ikos/core/example/variable_factory.hpp>
using ikos::core::Unsigned;
using Int = ikos::core::MachineInt;
using Interval = ikos::core::machine_int::Interval;
using Nullity = ikos::core::Nullity;
using Uninitialized = ikos::core::Uninitialized;
using VariableFactory = ikos::core::example::VariableFactory;
using Variable = VariableFactory::VariableRef;
using MemoryFactory = ikos::core::example::VariableFactory;
using MemLocation = MemoryFactory::VariableRef;
using VarOperand =
ikos::core::pointer::VariableOperand< Variable, MemLocation >;
using AddrOperand =
ikos::core::pointer::AddressOperand< Variable, MemLocation >;
using Assign = ikos::core::pointer::AssignConstraint< Variable, MemLocation >;
using Store = ikos::core::pointer::StoreConstraint< Variable, MemLocation >;
using Load = ikos::core::pointer::LoadConstraint< Variable, MemLocation >;
using PointerAbsValue = ikos::core::PointerAbsValue< MemLocation >;
using PointsToSet = ikos::core::PointsToSet< MemLocation >;
using ConstraintSystem =
ikos::core::pointer::ConstraintSystem< Variable, MemLocation >;
BOOST_AUTO_TEST_CASE(test_1) {
// Sample function:
//
// int **f(int **p, int *q) {
// int *tmp = q + 1;
// *p = tmp;
// return p;
// }
VariableFactory vfac;
MemoryFactory memfac;
Variable p(vfac.get("p"));
Variable q(vfac.get("q"));
Variable tmp(vfac.get("tmp"));
MemLocation x(memfac.get("x"));
MemLocation y(memfac.get("y"));
ConstraintSystem s(64, Unsigned);
// tmp = q + 1;
s.add(Assign::create(tmp,
VarOperand::create(q, Interval(Int(4, 64, Unsigned)))));
// *p = tmp
s.add(Store::create(p,
VarOperand::create(tmp, Interval(Int(0, 64, Unsigned)))));
// f(&x + [0, 4], &y + [8, 16])
s.add(Assign::create(p,
AddrOperand::create(x,
Interval(Int(0, 64, Unsigned),
Int(4, 64, Unsigned)))));
s.add(Assign::create(q,
AddrOperand::create(y,
Interval(Int(8, 64, Unsigned),
Int(16, 64, Unsigned)))));
s.solve();
BOOST_CHECK(
s.get_pointer(p) ==
PointerAbsValue(Uninitialized::top(),
Nullity::top(),
PointsToSet{x},
Interval(Int(0, 64, Unsigned), Int(4, 64, Unsigned))));
BOOST_CHECK(
s.get_pointer(q) ==
PointerAbsValue(Uninitialized::top(),
Nullity::top(),
PointsToSet{y},
Interval(Int(8, 64, Unsigned), Int(16, 64, Unsigned))));
BOOST_CHECK(
s.get_pointer(tmp) ==
PointerAbsValue(Uninitialized::top(),
Nullity::top(),
PointsToSet{y},
Interval(Int(12, 64, Unsigned), Int(20, 64, Unsigned))));
BOOST_CHECK(
s.get_memory(x) ==
PointerAbsValue(Uninitialized::top(),
Nullity::top(),
PointsToSet{y},
Interval(Int(12, 64, Unsigned), Int(20, 64, Unsigned))));
BOOST_CHECK(s.get_memory(y) == PointerAbsValue::bottom(64, Unsigned));
}
BOOST_AUTO_TEST_CASE(test_2) {
// int x, y;
// int **p, *q;
// q = &x;
// p = &q;
// *p = &y;
// translated by llvm:
// i32* x = alloca i32
// i32* y = alloca i32
// i32*** p = alloca i32**
// i32** q = alloca i32*
// store x, q
// store q, p
// tmp = load p
// store y, tmp
VariableFactory vfac;
MemoryFactory memfac;
Variable x(vfac.get("x"));
Variable y(vfac.get("y"));
Variable p(vfac.get("p"));
Variable q(vfac.get("q"));
Variable tmp(vfac.get("tmp"));
MemLocation mx(memfac.get("&x"));
MemLocation my(memfac.get("&y"));
MemLocation mp(memfac.get("&p"));
MemLocation mq(memfac.get("&q"));
ConstraintSystem s(64, Unsigned);
Interval zero(Int(0, 64, Unsigned));
// i32* x = alloca i32
s.add(Assign::create(x, AddrOperand::create(mx, zero)));
// i32* y = alloca i32
s.add(Assign::create(y, AddrOperand::create(my, zero)));
// i32*** p = alloca i32**
s.add(Assign::create(p, AddrOperand::create(mp, zero)));
// i32** q = alloca i32*
s.add(Assign::create(q, AddrOperand::create(mq, zero)));
// store x, q
s.add(Store::create(q, VarOperand::create(x, zero)));
// store q, p
s.add(Store::create(p, VarOperand::create(q, zero)));
// tmp = load p
s.add(Load::create(tmp, VarOperand::create(p, zero)));
// store y, tmp
s.add(Store::create(tmp, VarOperand::create(y, zero)));
s.solve();
BOOST_CHECK(s.get_memory(mp) == PointerAbsValue(Uninitialized::top(),
Nullity::top(),
PointsToSet{mq},
zero));
BOOST_CHECK(s.get_memory(mq) == PointerAbsValue(Uninitialized::top(),
Nullity::top(),
PointsToSet{mx, my},
zero));
}
BOOST_AUTO_TEST_CASE(test_3) {
// Sample function:
// global struct foo * x = null;
//-- %main._0 = call noalias i8* @malloc(i64 8) nounwind, !dbg !18
// p0 = malloc(8);
//-- %main._1 = bitcast i8* %main._0 to %struct.foo*, !dbg !18
// p1 = p0;
//-- store %struct.foo* %main._1, %struct.foo** @x, align 8, !dbg !18
// *x = p1
//-- %main._4 = load %struct.foo** @x, align 8, !dbg !21
// p4 = *x;
//-- %main._5 = getelementptr inbounds %struct.foo* %main._4, i32 0, i32 0,
//! dbg !21
// p5 = p4 + 0;
//-- store i32 5, i32* %main._5, align 4, !dbg !21
/*C*/
// *p5 = 5; // x->a = 5;
//-- %main._6 = load %struct.foo** @x, align 8, !dbg !22
// p6 = *x;
//-- %main._7 = load %struct.foo** @x, align 8, !dbg !22
// p7 = *x;
//-- %main._8 = getelementptr inbounds %struct.foo* %main._7, i32 0, i32 0,
//! dbg !22
// p8 = p7 + 0;
//-- %main._9 = load i32* %main._8, align 4, !dbg !22
/*C*/
// p9 = *p8; // *(x).a
//-- %main._10 = add nsw i32 %main._9, 7, !dbg !22
/*C*/
// p10 = p9 + 7;
//-- %main._11 = getelementptr inbounds %struct.foo* %main._6, i32 0, i32 1,
//! dbg !22
// p11 = p6 + 4;
//-- store i32 %main._10, i32* %main._11, align 4, !dbg !22
/*C*/
// *p11 = p10; // x->b = x->a + 7;
//
// At this point x->a = 5 and x->b = 12
VariableFactory vfac;
MemoryFactory memfac;
Variable x(vfac.get("x"));
Variable p0(vfac.get("p0"));
Variable p1(vfac.get("p1"));
Variable p4(vfac.get("p4"));
Variable p5(vfac.get("p5"));
Variable p6(vfac.get("p6"));
Variable p7(vfac.get("p7"));
Variable p8(vfac.get("p8"));
Variable p11(vfac.get("p11"));
MemLocation mx(memfac.get("&x"));
MemLocation malloc(memfac.get("malloc"));
ConstraintSystem s(64, Unsigned);
Interval zero(Int(0, 64, Unsigned));
// declaration of global variable x
s.add(Assign::create(x, AddrOperand::create(mx, zero)));
// p0 = malloc(8);
s.add(Assign::create(p0, AddrOperand::create(malloc, zero)));
// p1 = p0;
s.add(Assign::create(p1, VarOperand::create(p0, zero)));
// *x = p1;
s.add(Store::create(x, VarOperand::create(p1, zero)));
// p4 = *x;
s.add(Load::create(p4, VarOperand::create(x, zero)));
// p5 = p4;
s.add(Assign::create(p5, VarOperand::create(p4, zero)));
// *p5 = 5;
// no pointer constraint
// p6 = *x;
s.add(Load::create(p6, VarOperand::create(x, zero)));
// p7 = *x;
s.add(Load::create(p7, VarOperand::create(x, zero)));
// p8 = p7;
s.add(Assign::create(p8, VarOperand::create(p7, zero)));
// p9 = *p8;
// no pointer constraint
// p10 = p9 + 7;
// no pointer constraint
// p11 = p6 + 4;
s.add(Assign::create(p11,
VarOperand::create(p6, Interval(Int(4, 64, Unsigned)))));
// *p11 = p10;
// no pointer constraint
s.solve();
BOOST_CHECK(s.get_pointer(p5) == PointerAbsValue(Uninitialized::top(),
Nullity::top(),
PointsToSet{malloc},
zero));
BOOST_CHECK(s.get_pointer(p8) == PointerAbsValue(Uninitialized::top(),
Nullity::top(),
PointsToSet{malloc},
zero));
BOOST_CHECK(s.get_pointer(p11) ==
PointerAbsValue(Uninitialized::top(),
Nullity::top(),
PointsToSet{malloc},
Interval(Int(4, 64, Unsigned))));
}
BOOST_AUTO_TEST_CASE(test_4) {
/*
l = malloc (sizeof(int) * ncols);
for (i=0;i<10;i++)
{
l[i] = malloc (sizeof(int) * nrows)
}
*/
VariableFactory vfac;
MemoryFactory memfac;
Variable l(vfac.get("l"));
Variable tmp(vfac.get("tmp"));
MemLocation ncols(memfac.get("ncols"));
MemLocation nrows(memfac.get("nrows"));
ConstraintSystem s(64, Unsigned);
Interval zero(Int(0, 64, Unsigned));
s.add(Assign::create(l, AddrOperand::create(ncols, zero)));
s.add(Assign::create(tmp,
VarOperand::create(l,
Interval(Int(0, 64, Unsigned),
Int(9, 64, Unsigned)))));
s.add(Store::create(tmp, AddrOperand::create(nrows, zero)));
s.solve();
BOOST_CHECK(s.get_pointer(l) == PointerAbsValue(Uninitialized::top(),
Nullity::top(),
PointsToSet{ncols},
zero));
BOOST_CHECK(
s.get_pointer(tmp) ==
PointerAbsValue(Uninitialized::top(),
Nullity::top(),
PointsToSet{ncols},
Interval(Int(0, 64, Unsigned), Int(9, 64, Unsigned))));
BOOST_CHECK(s.get_memory(ncols) == PointerAbsValue(Uninitialized::top(),
Nullity::top(),
PointsToSet{nrows},
zero));
BOOST_CHECK(s.get_memory(nrows) == PointerAbsValue::bottom(64, Unsigned));
}
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