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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 "Core/ExecutionState.h"
#include "Core/ExecutionTree.h"
#include "Core/Searcher.h"
#include "klee/ADT/RNG.h"
#include "llvm/Support/raw_ostream.h"
using namespace klee;
namespace {
TEST(SearcherTest, RandomPath) {
// First state
ExecutionState es;
InMemoryExecutionTree executionTree(es);
RNG rng;
RandomPathSearcher rp(&executionTree, rng);
EXPECT_TRUE(rp.empty());
rp.update(nullptr, {&es}, {});
EXPECT_FALSE(rp.empty());
EXPECT_EQ(&rp.selectState(), &es);
// Two states
ExecutionState es1(es);
executionTree.attach(es.executionTreeNode, &es1, &es,
BranchType::Conditional);
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});
executionTree.remove(es.executionTreeNode);
for (int i = 0; i < 100; i++) {
EXPECT_EQ(&rp.selectState(), &es1);
}
rp.update(&es1, {}, {&es1});
executionTree.remove(es1.executionTreeNode);
EXPECT_TRUE(rp.empty());
}
TEST(SearcherTest, TwoRandomPath) {
// Root state
ExecutionState root;
InMemoryExecutionTree executionTree(root);
ExecutionState es(root);
executionTree.attach(root.executionTreeNode, &es, &root,
BranchType::Conditional);
RNG rng, rng1;
RandomPathSearcher rp(&executionTree, rng);
RandomPathSearcher rp1(&executionTree, 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);
executionTree.attach(es.executionTreeNode, &es1, &es,
BranchType::Conditional);
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});
executionTree.remove(es.executionTreeNode);
EXPECT_TRUE(rp1.empty());
EXPECT_EQ(&rp.selectState(), &es1);
rp.update(&es1, {}, {&es1});
executionTree.remove(es1.executionTreeNode);
EXPECT_TRUE(rp.empty());
EXPECT_TRUE(rp1.empty());
executionTree.remove(root.executionTreeNode);
}
TEST(SearcherTest, TwoRandomPathDot) {
std::stringstream modelExecutionTreeDot;
ExecutionTreeNode *rootExecutionTreeNode, *rightLeafExecutionTreeNode,
*esParentExecutionTreeNode, *es1LeafExecutionTreeNode,
*esLeafExecutionTreeNode;
// Root state
ExecutionState root;
InMemoryExecutionTree executionTree(root);
rootExecutionTreeNode = root.executionTreeNode;
ExecutionState es(root);
executionTree.attach(root.executionTreeNode, &es, &root, BranchType::NONE);
rightLeafExecutionTreeNode = root.executionTreeNode;
esParentExecutionTreeNode = es.executionTreeNode;
RNG rng;
RandomPathSearcher rp(&executionTree, rng);
RandomPathSearcher rp1(&executionTree, rng);
rp.update(nullptr, {&es}, {});
ExecutionState es1(es);
executionTree.attach(es.executionTreeNode, &es1, &es, BranchType::NONE);
esLeafExecutionTreeNode = es.executionTreeNode;
es1LeafExecutionTreeNode = es1.executionTreeNode;
rp.update(&es, {}, {});
rp1.update(nullptr, {&es1}, {});
// Compare ExecutionTree to model ExecutionTree
modelExecutionTreeDot
<< "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" << rootExecutionTreeNode << " [shape=diamond];\n"
<< "\tn" << rootExecutionTreeNode << " -> n" << esParentExecutionTreeNode << " [label=0b011];\n"
<< "\tn" << rootExecutionTreeNode << " -> n" << rightLeafExecutionTreeNode << " [label=0b000];\n"
<< "\tn" << rightLeafExecutionTreeNode << " [shape=diamond,fillcolor=green];\n"
<< "\tn" << esParentExecutionTreeNode << " [shape=diamond];\n"
<< "\tn" << esParentExecutionTreeNode << " -> n" << es1LeafExecutionTreeNode << " [label=0b010];\n"
<< "\tn" << esParentExecutionTreeNode << " -> n" << esLeafExecutionTreeNode << " [label=0b001];\n"
<< "\tn" << esLeafExecutionTreeNode << " [shape=diamond,fillcolor=green];\n"
<< "\tn" << es1LeafExecutionTreeNode << " [shape=diamond,fillcolor=green];\n"
<< "}\n";
std::string executionTreeDot;
llvm::raw_string_ostream executionTreeDotStream(executionTreeDot);
executionTree.dump(executionTreeDotStream);
EXPECT_EQ(modelExecutionTreeDot.str(), executionTreeDotStream.str());
rp.update(&es, {&es1}, {&es});
rp1.update(nullptr, {&es}, {&es1});
rp1.update(&es, {}, {&es});
executionTree.remove(es.executionTreeNode);
modelExecutionTreeDot.str("");
modelExecutionTreeDot
<< "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" << rootExecutionTreeNode << " [shape=diamond];\n"
<< "\tn" << rootExecutionTreeNode << " -> n" << esParentExecutionTreeNode << " [label=0b001];\n"
<< "\tn" << rootExecutionTreeNode << " -> n" << rightLeafExecutionTreeNode << " [label=0b000];\n"
<< "\tn" << rightLeafExecutionTreeNode << " [shape=diamond,fillcolor=green];\n"
<< "\tn" << esParentExecutionTreeNode << " [shape=diamond];\n"
<< "\tn" << esParentExecutionTreeNode << " -> n" << es1LeafExecutionTreeNode << " [label=0b001];\n"
<< "\tn" << es1LeafExecutionTreeNode << " [shape=diamond,fillcolor=green];\n"
<< "}\n";
executionTreeDot = "";
executionTree.dump(executionTreeDotStream);
EXPECT_EQ(modelExecutionTreeDot.str(), executionTreeDotStream.str());
executionTree.remove(es1.executionTreeNode);
executionTree.remove(root.executionTreeNode);
}
TEST(SearcherDeathTest, TooManyRandomPaths) {
// First state
ExecutionState es;
InMemoryExecutionTree executionTree(es);
executionTree.remove(es.executionTreeNode); // Need to remove to avoid leaks
RNG rng;
RandomPathSearcher rp(&executionTree, rng);
RandomPathSearcher rp1(&executionTree, rng);
RandomPathSearcher rp2(&executionTree, rng);
ASSERT_DEATH({ RandomPathSearcher rp3(&executionTree, rng); }, "");
}
}
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