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//===-- SearcherTest.cpp ----------------------------------------------------===//
//
// The KLEE Symbolic Virtual Machine
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#define KLEE_UNITTEST
#include "gtest/gtest.h"
#include "klee/ADT/RNG.h"
#include "Core/ExecutionState.h"
#include "Core/PTree.h"
#include "Core/Searcher.h"
#include "llvm/Support/raw_ostream.h"
using namespace klee;
namespace {
TEST(SearcherTest, RandomPath) {
// First state
ExecutionState es;
PTree processTree(&es);
es.ptreeNode = processTree.root.getPointer();
RNG rng;
RandomPathSearcher rp(processTree, rng);
EXPECT_TRUE(rp.empty());
rp.update(nullptr, {&es}, {});
EXPECT_FALSE(rp.empty());
EXPECT_EQ(&rp.selectState(), &es);
// Two states
ExecutionState es1(es);
processTree.attach(es.ptreeNode, &es1, &es);
rp.update(&es, {&es1}, {});
// Random path seed dependant
EXPECT_EQ(&rp.selectState(), &es1);
EXPECT_EQ(&rp.selectState(), &es);
EXPECT_EQ(&rp.selectState(), &es1);
rp.update(&es, {}, {&es1});
for (int i = 0; i < 100; i++) {
EXPECT_EQ(&rp.selectState(), &es);
}
rp.update(&es, {&es1}, {&es});
processTree.remove(es.ptreeNode);
for (int i = 0; i < 100; i++) {
EXPECT_EQ(&rp.selectState(), &es1);
}
rp.update(&es1, {}, {&es1});
processTree.remove(es1.ptreeNode);
EXPECT_TRUE(rp.empty());
}
TEST(SearcherTest, TwoRandomPath) {
// Root state
ExecutionState root;
PTree processTree(&root);
root.ptreeNode = processTree.root.getPointer();
ExecutionState es(root);
processTree.attach(root.ptreeNode, &es, &root);
RNG rng, rng1;
RandomPathSearcher rp(processTree, rng);
RandomPathSearcher rp1(processTree, rng1);
EXPECT_TRUE(rp.empty());
EXPECT_TRUE(rp1.empty());
rp.update(nullptr, {&es}, {});
EXPECT_FALSE(rp.empty());
EXPECT_TRUE(rp1.empty());
EXPECT_EQ(&rp.selectState(), &es);
// Two states
ExecutionState es1(es);
processTree.attach(es.ptreeNode, &es1, &es);
rp.update(&es, {}, {});
rp1.update(nullptr, {&es1}, {});
EXPECT_FALSE(rp1.empty());
for (int i = 0; i < 100; i++) {
EXPECT_EQ(&rp.selectState(), &es);
EXPECT_EQ(&rp1.selectState(), &es1);
}
rp.update(&es, {&es1}, {&es});
rp1.update(nullptr, {&es}, {&es1});
for (int i = 0; i < 100; i++) {
EXPECT_EQ(&rp1.selectState(), &es);
EXPECT_EQ(&rp.selectState(), &es1);
}
rp1.update(&es, {}, {&es});
processTree.remove(es.ptreeNode);
EXPECT_TRUE(rp1.empty());
EXPECT_EQ(&rp.selectState(), &es1);
rp.update(&es1, {}, {&es1});
processTree.remove(es1.ptreeNode);
EXPECT_TRUE(rp.empty());
EXPECT_TRUE(rp1.empty());
processTree.remove(root.ptreeNode);
}
TEST(SearcherTest, TwoRandomPathDot) {
std::stringstream modelPTreeDot;
PTreeNode *rootPNode, *rightLeafPNode, *esParentPNode, *es1LeafPNode,
*esLeafPNode;
// Root state
ExecutionState root;
PTree processTree(&root);
root.ptreeNode = processTree.root.getPointer();
rootPNode = root.ptreeNode;
ExecutionState es(root);
processTree.attach(root.ptreeNode, &es, &root);
rightLeafPNode = root.ptreeNode;
esParentPNode = es.ptreeNode;
RNG rng;
RandomPathSearcher rp(processTree, rng);
RandomPathSearcher rp1(processTree, rng);
rp.update(nullptr, {&es}, {});
ExecutionState es1(es);
processTree.attach(es.ptreeNode, &es1, &es);
esLeafPNode = es.ptreeNode;
es1LeafPNode = es1.ptreeNode;
rp.update(&es, {}, {});
rp1.update(nullptr, {&es1}, {});
// Compare PTree to model PTree
modelPTreeDot
<< "digraph G {\n"
<< "\tsize=\"10,7.5\";\n"
<< "\tratio=fill;\n"
<< "\trotate=90;\n"
<< "\tcenter = \"true\";\n"
<< "\tnode [style=\"filled\",width=.1,height=.1,fontname=\"Terminus\"]\n"
<< "\tedge [arrowsize=.3]\n"
<< "\tn" << rootPNode << " [shape=diamond];\n"
<< "\tn" << rootPNode << " -> n" << esParentPNode << " [label=0b011];\n"
<< "\tn" << rootPNode << " -> n" << rightLeafPNode << " [label=0b000];\n"
<< "\tn" << rightLeafPNode << " [shape=diamond,fillcolor=green];\n"
<< "\tn" << esParentPNode << " [shape=diamond];\n"
<< "\tn" << esParentPNode << " -> n" << es1LeafPNode
<< " [label=0b010];\n"
<< "\tn" << esParentPNode << " -> n" << esLeafPNode << " [label=0b001];\n"
<< "\tn" << esLeafPNode << " [shape=diamond,fillcolor=green];\n"
<< "\tn" << es1LeafPNode << " [shape=diamond,fillcolor=green];\n"
<< "}\n";
std::string pTreeDot;
llvm::raw_string_ostream pTreeDotStream(pTreeDot);
processTree.dump(pTreeDotStream);
EXPECT_EQ(modelPTreeDot.str(), pTreeDotStream.str());
rp.update(&es, {&es1}, {&es});
rp1.update(nullptr, {&es}, {&es1});
rp1.update(&es, {}, {&es});
processTree.remove(es.ptreeNode);
modelPTreeDot.str("");
modelPTreeDot
<< "digraph G {\n"
<< "\tsize=\"10,7.5\";\n"
<< "\tratio=fill;\n"
<< "\trotate=90;\n"
<< "\tcenter = \"true\";\n"
<< "\tnode [style=\"filled\",width=.1,height=.1,fontname=\"Terminus\"]\n"
<< "\tedge [arrowsize=.3]\n"
<< "\tn" << rootPNode << " [shape=diamond];\n"
<< "\tn" << rootPNode << " -> n" << esParentPNode << " [label=0b001];\n"
<< "\tn" << rootPNode << " -> n" << rightLeafPNode << " [label=0b000];\n"
<< "\tn" << rightLeafPNode << " [shape=diamond,fillcolor=green];\n"
<< "\tn" << esParentPNode << " [shape=diamond];\n"
<< "\tn" << esParentPNode << " -> n" << es1LeafPNode
<< " [label=0b001];\n"
<< "\tn" << es1LeafPNode << " [shape=diamond,fillcolor=green];\n"
<< "}\n";
pTreeDot = "";
processTree.dump(pTreeDotStream);
EXPECT_EQ(modelPTreeDot.str(), pTreeDotStream.str());
processTree.remove(es1.ptreeNode);
processTree.remove(root.ptreeNode);
}
TEST(SearcherDeathTest, TooManyRandomPaths) {
// First state
ExecutionState es;
PTree processTree(&es);
es.ptreeNode = processTree.root.getPointer();
processTree.remove(es.ptreeNode); // Need to remove to avoid leaks
RNG rng;
RandomPathSearcher rp(processTree, rng);
RandomPathSearcher rp1(processTree, rng);
RandomPathSearcher rp2(processTree, rng);
ASSERT_DEATH({ RandomPathSearcher rp3(processTree, rng); }, "");
}
}
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