1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
|
//===-- ExecutionTreeWriter.cpp -------------------------------------------===//
//
// The KLEE Symbolic Virtual Machine
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "ExecutionTreeWriter.h"
#include "ExecutionTree.h"
#include "klee/Support/ErrorHandling.h"
#include "klee/Support/OptionCategories.h"
#include "llvm/Support/CommandLine.h"
namespace {
llvm::cl::opt<unsigned> BatchSize(
"ptree-batch-size", llvm::cl::init(100U),
llvm::cl::desc("Number of execution tree nodes to batch for writing, "
"see --write-execution-tree (default=100)"),
llvm::cl::cat(klee::ExecTreeCat));
} // namespace
using namespace klee;
void prepare_statement(sqlite3 *db, const std::string &query, sqlite3_stmt **stmt) {
int result;
#ifdef SQLITE_PREPARE_PERSISTENT
result = sqlite3_prepare_v3(db, query.c_str(), -1, SQLITE_PREPARE_PERSISTENT,
stmt, nullptr);
#else
result = sqlite3_prepare_v3(db, query.c_str(), -1, 0, stmt, nullptr);
#endif
if (result != SQLITE_OK) {
klee_warning("Execution tree database: cannot prepare query: %s [%s]",
sqlite3_errmsg(db), query.c_str());
sqlite3_close(db);
klee_error("Execution tree database: cannot prepare query: %s",
query.c_str());
}
}
ExecutionTreeWriter::ExecutionTreeWriter(const std::string &dbPath) {
// create database file
if (sqlite3_open(dbPath.c_str(), &db) != SQLITE_OK)
klee_error("Cannot create execution tree database: %s", sqlite3_errmsg(db));
// - set options: asynchronous + WAL
char *errMsg = nullptr;
if (sqlite3_exec(db, "PRAGMA synchronous = OFF;", nullptr, nullptr,
&errMsg) != SQLITE_OK) {
klee_warning("Execution tree database: cannot set option: %s", errMsg);
sqlite3_free(errMsg);
}
if (sqlite3_exec(db, "PRAGMA journal_mode = WAL;", nullptr, nullptr,
&errMsg) != SQLITE_OK) {
klee_warning("Execution tree database: cannot set option: %s", errMsg);
sqlite3_free(errMsg);
}
// - create table
std::string query =
"CREATE TABLE IF NOT EXISTS nodes ("
"ID INT PRIMARY KEY, stateID INT, leftID INT, rightID INT,"
"asmLine INT, kind INT);";
char *zErr = nullptr;
if (sqlite3_exec(db, query.c_str(), nullptr, nullptr, &zErr) != SQLITE_OK) {
klee_warning("Execution tree database: initialisation error: %s", zErr);
sqlite3_free(zErr);
sqlite3_close(db);
klee_error("Execution tree database: initialisation error.");
}
// create prepared statements
// - insertStmt
query = "INSERT INTO nodes VALUES (?, ?, ?, ?, ?, ?);";
prepare_statement(db, query, &insertStmt);
// - transactionBeginStmt
query = "BEGIN TRANSACTION";
prepare_statement(db, query, &transactionBeginStmt);
// - transactionCommitStmt
query = "COMMIT TRANSACTION";
prepare_statement(db, query, &transactionCommitStmt);
// begin transaction
if (sqlite3_step(transactionBeginStmt) != SQLITE_DONE) {
klee_warning("Execution tree database: cannot begin transaction: %s",
sqlite3_errmsg(db));
}
if (sqlite3_reset(transactionBeginStmt) != SQLITE_OK) {
klee_warning("Execution tree database: cannot reset transaction: %s",
sqlite3_errmsg(db));
}
}
ExecutionTreeWriter::~ExecutionTreeWriter() {
batchCommit(!flushed);
// finalize prepared statements
sqlite3_finalize(insertStmt);
sqlite3_finalize(transactionBeginStmt);
sqlite3_finalize(transactionCommitStmt);
// commit
if (sqlite3_exec(db, "END TRANSACTION", nullptr, nullptr, nullptr) !=
SQLITE_OK) {
klee_warning("Execution tree database: cannot end transaction: %s",
sqlite3_errmsg(db));
}
if (sqlite3_close(db) != SQLITE_OK) {
klee_warning("Execution tree database: cannot close database: %s",
sqlite3_errmsg(db));
}
}
void ExecutionTreeWriter::batchCommit(bool force) {
++batch;
if (batch < BatchSize && !force)
return;
// commit and begin transaction
if (sqlite3_step(transactionCommitStmt) != SQLITE_DONE) {
klee_warning("Execution tree database: transaction commit error: %s",
sqlite3_errmsg(db));
}
if (sqlite3_reset(transactionCommitStmt) != SQLITE_OK) {
klee_warning("Execution tree database: transaction reset error: %s",
sqlite3_errmsg(db));
}
if (sqlite3_step(transactionBeginStmt) != SQLITE_DONE) {
klee_warning("Execution tree database: transaction begin error: %s",
sqlite3_errmsg(db));
}
if (sqlite3_reset(transactionBeginStmt) != SQLITE_OK) {
klee_warning("Execution tree database: transaction reset error: %s",
sqlite3_errmsg(db));
}
batch = 0;
flushed = true;
}
void ExecutionTreeWriter::write(const AnnotatedExecutionTreeNode &node) {
unsigned rc = 0;
// bind values (SQLITE_OK is defined as 0 - just check success once at the
// end)
rc |= sqlite3_bind_int64(insertStmt, 1, node.id);
rc |= sqlite3_bind_int(insertStmt, 2, node.stateID);
rc |= sqlite3_bind_int64(
insertStmt, 3,
node.left.getPointer()
? (static_cast<AnnotatedExecutionTreeNode *>(node.left.getPointer()))->id
: 0);
rc |= sqlite3_bind_int64(
insertStmt, 4,
node.right.getPointer()
? (static_cast<AnnotatedExecutionTreeNode *>(node.right.getPointer()))->id
: 0);
rc |= sqlite3_bind_int(insertStmt, 5, node.asmLine);
std::uint8_t value{0};
if (std::holds_alternative<BranchType>(node.kind)) {
value = static_cast<std::uint8_t>(std::get<BranchType>(node.kind));
} else if (std::holds_alternative<StateTerminationType>(node.kind)) {
value =
static_cast<std::uint8_t>(std::get<StateTerminationType>(node.kind));
} else {
assert(false && "ExecutionTreeWriter: Illegal node kind!");
}
rc |= sqlite3_bind_int(insertStmt, 6, value);
if (rc != SQLITE_OK) {
// This is either a programming error (e.g. SQLITE_MISUSE) or we ran out of
// resources (e.g. SQLITE_NOMEM). Calling sqlite3_errmsg() after a possible
// successful call above is undefined, hence no error message here.
klee_error("Execution tree database: cannot persist data for node: %u",
node.id);
}
// insert
if (sqlite3_step(insertStmt) != SQLITE_DONE) {
klee_warning(
"Execution tree database: cannot persist data for node: %u: %s",
node.id, sqlite3_errmsg(db));
}
if (sqlite3_reset(insertStmt) != SQLITE_OK) {
klee_warning("Execution tree database: error reset node: %u: %s", node.id,
sqlite3_errmsg(db));
}
batchCommit();
}
|
