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cppcheck/test/testassert.cpp at main · devzero2000/cppcheck · GitHub
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/*
* Cppcheck - A tool for static C/C++ code analysis
* Copyright (C) 2007-2022 Cppcheck team.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#
include
"
checkassert.h
"
#
include
"
errortypes.h
"
#
include
"
settings.h
"
#
include
"
testsuite.h
"
#
include
"
tokenize.h
"
#
include
<
iosfwd
>
class
TestAssert
:
public
TestFixture
{
public:
TestAssert
() : TestFixture(
"
TestAssert
"
) {}
private:
Settings settings;
#
define
check
(...) check_(__FILE__, __LINE__, __VA_ARGS__)
void
check_
(
const
char
* file,
int
line,
const
char
code[],
const
char
*filename =
"
test.cpp
"
) {
//
Clear the error buffer..
errout.
str
(
"
"
);
//
Tokenize..
Tokenizer
tokenizer
(&settings,
this
);
std::istringstream
istr
(code);
ASSERT_LOC
(tokenizer.
tokenize
(istr, filename), file, line);
//
Check..
CheckAssert checkAssert;
checkAssert.
runChecks
(&tokenizer, &settings,
this
);
}
void
run
()
override
{
settings.
severity
.
enable
(Severity::warning);
TEST_CASE
(assignmentInAssert);
TEST_CASE
(functionCallInAssert);
TEST_CASE
(memberFunctionCallInAssert);
TEST_CASE
(safeFunctionCallInAssert);
TEST_CASE
(crash);
}
void
safeFunctionCallInAssert
() {
check
(
"
int a;
\n
"
"
bool b = false;
\n
"
"
int foo() {
\n
"
"
if (b) { a = 1+2 };
\n
"
"
return a;
\n
"
"
}
\n
"
"
assert(foo() == 3);
"
);
ASSERT_EQUALS
(
"
"
, errout.
str
());
check
(
"
int foo(int a) {
\n
"
"
int b=a+1;
\n
"
"
return b;
\n
"
"
}
\n
"
"
assert(foo(1) == 2);
"
);
ASSERT_EQUALS
(
"
"
, errout.
str
());
}
void
functionCallInAssert
() {
check
(
"
int a;
\n
"
"
int foo() {
\n
"
"
a = 1+2;
\n
"
"
return a;
\n
"
"
}
\n
"
"
assert(foo() == 3);
"
);
ASSERT_EQUALS
(
"
[test.cpp:6]: (warning) Assert statement calls a function which may have desired side effects: 'foo'.
\n
"
, errout.
str
());
//
Ticket #4937 "false positive: Assert calls a function which may have desired side effects"
check
(
"
struct SquarePack {
\n
"
"
static bool isRank1Or8( Square sq ) {
\n
"
"
sq &= 0x38;
\n
"
"
return sq == 0 || sq == 0x38;
\n
"
"
}
\n
"
"
};
\n
"
"
void foo() {
\n
"
"
assert( !SquarePack::isRank1Or8(push2) );
\n
"
"
}
"
);
ASSERT_EQUALS
(
"
"
, errout.
str
());
check
(
"
struct SquarePack {
\n
"
"
static bool isRank1Or8( Square &sq ) {
\n
"
"
sq &= 0x38;
\n
"
"
return sq == 0 || sq == 0x38;
\n
"
"
}
\n
"
"
};
\n
"
"
void foo() {
\n
"
"
assert( !SquarePack::isRank1Or8(push2) );
\n
"
"
}
"
);
ASSERT_EQUALS
(
"
[test.cpp:8]: (warning) Assert statement calls a function which may have desired side effects: 'isRank1Or8'.
\n
"
, errout.
str
());
check
(
"
struct SquarePack {
\n
"
"
static bool isRank1Or8( Square *sq ) {
\n
"
"
*sq &= 0x38;
\n
"
"
return *sq == 0 || *sq == 0x38;
\n
"
"
}
\n
"
"
};
\n
"
"
void foo() {
\n
"
"
assert( !SquarePack::isRank1Or8(push2) );
\n
"
"
}
"
);
ASSERT_EQUALS
(
"
[test.cpp:8]: (warning) Assert statement calls a function which may have desired side effects: 'isRank1Or8'.
\n
"
, errout.
str
());
check
(
"
struct SquarePack {
\n
"
"
static bool isRank1Or8( Square *sq ) {
\n
"
"
sq &= 0x38;
\n
"
"
return sq == 0 || sq == 0x38;
\n
"
"
}
\n
"
"
};
\n
"
"
void foo() {
\n
"
"
assert( !SquarePack::isRank1Or8(push2) );
\n
"
"
}
"
);
ASSERT_EQUALS
(
"
"
, errout.
str
());
}
void
memberFunctionCallInAssert
() {
check
(
"
struct SquarePack {
\n
"
"
void Foo();
\n
"
"
};
\n
"
"
void foo(SquarePack s) {
\n
"
"
assert( s.Foo() );
\n
"
"
}
"
);
ASSERT_EQUALS
(
"
[test.cpp:5]: (warning) Assert statement calls a function which may have desired side effects: 'Foo'.
\n
"
, errout.
str
());
check
(
"
struct SquarePack {
\n
"
"
void Foo() const;
\n
"
"
};
\n
"
"
void foo(SquarePack* s) {
\n
"
"
assert( s->Foo() );
\n
"
"
}
"
);
ASSERT_EQUALS
(
"
"
, errout.
str
());
check
(
"
struct SquarePack {
\n
"
"
static void Foo();
\n
"
"
};
\n
"
"
void foo(SquarePack* s) {
\n
"
"
assert( s->Foo() );
\n
"
"
}
"
);
ASSERT_EQUALS
(
"
"
, errout.
str
());
check
(
"
struct SquarePack {
\n
"
"
};
\n
"
"
void foo(SquarePack* s) {
\n
"
"
assert( s->Foo() );
\n
"
"
}
"
);
ASSERT_EQUALS
(
"
"
, errout.
str
());
}
void
assignmentInAssert
() {
check
(
"
void f() {
\n
"
"
int a; a = 0;
\n
"
"
assert(a = 2);
\n
"
"
return a;
\n
"
"
}
"
);
ASSERT_EQUALS
(
"
[test.cpp:3]: (warning) Assert statement modifies 'a'.
\n
"
, errout.
str
());
check
(
"
void f(int a) {
\n
"
"
assert(a == 2);
\n
"
"
return a;
\n
"
"
}
"
);
ASSERT_EQUALS
(
"
"
, errout.
str
());
check
(
"
void f(int a, int b) {
\n
"
"
assert(a == 2 && (b = 1));
\n
"
"
return a;
\n
"
"
}
"
);
ASSERT_EQUALS
(
"
[test.cpp:2]: (warning) Assert statement modifies 'b'.
\n
"
, errout.
str
());
check
(
"
void f() {
\n
"
"
int a; a = 0;
\n
"
"
assert(a += 2);
\n
"
"
return a;
\n
"
"
}
"
);
ASSERT_EQUALS
(
"
[test.cpp:3]: (warning) Assert statement modifies 'a'.
\n
"
, errout.
str
());
check
(
"
void f() {
\n
"
"
int a; a = 0;
\n
"
"
assert(a *= 2);
\n
"
"
return a;
\n
"
"
}
"
);
ASSERT_EQUALS
(
"
[test.cpp:3]: (warning) Assert statement modifies 'a'.
\n
"
, errout.
str
());
check
(
"
void f() {
\n
"
"
int a; a = 0;
\n
"
"
assert(a -= 2);
\n
"
"
return a;
\n
"
"
}
"
);
ASSERT_EQUALS
(
"
[test.cpp:3]: (warning) Assert statement modifies 'a'.
\n
"
, errout.
str
());
check
(
"
void f() {
\n
"
"
int a = 0;
\n
"
"
assert(a--);
\n
"
"
return a;
\n
"
"
}
"
);
ASSERT_EQUALS
(
"
[test.cpp:3]: (warning) Assert statement modifies 'a'.
\n
"
, errout.
str
());
check
(
"
void f() {
\n
"
"
int a = 0;
\n
"
"
assert(--a);
\n
"
"
return a;
\n
"
"
}
"
);
ASSERT_EQUALS
(
"
[test.cpp:3]: (warning) Assert statement modifies 'a'.
\n
"
, errout.
str
());
check
(
"
void f() {
\n
"
"
assert(std::all_of(first, last, []() {
\n
"
"
auto tmp = x.someValue();
\n
"
"
auto const expected = someOtherValue;
\n
"
"
return tmp == expected;
\n
"
"
}));
\n
"
"
}
"
);
ASSERT_EQUALS
(
"
"
, errout.
str
());
}
void
crash
() {
check
(
"
void foo() {
\n
"
"
assert(sizeof(struct { int a[x++]; })==sizeof(int));
\n
"
"
}
"
);
ASSERT_EQUALS
(
"
"
, errout.
str
());
check
(
"
void foo() {
\n
"
//
#9790
"
assert(kad_bucket_hash(&(kad_guid) { .bytes = { 0 } }, & (kad_guid){.bytes = { 0 }}) == -1);
\n
"
"
}
"
);
ASSERT_EQUALS
(
"
"
, errout.
str
());
}
};
REGISTER_TEST
(TestAssert)
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