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Copy pathtestexceptionsafety.cpp
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313 lines (279 loc) · 9.71 KB
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/*
* Cppcheck - A tool for static C/C++ code analysis
* Copyright (C) 2007-2013 Daniel Marjamäki and 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 "tokenize.h"
#include "checkexceptionsafety.h"
#include "testsuite.h"
#include <sstream>
extern std::ostringstream errout;
class TestExceptionSafety : public TestFixture {
public:
TestExceptionSafety() : TestFixture("TestExceptionSafety")
{ }
private:
void run() {
TEST_CASE(destructors);
TEST_CASE(deallocThrow1);
TEST_CASE(deallocThrow2);
TEST_CASE(deallocThrow3);
TEST_CASE(rethrowCopy1);
TEST_CASE(rethrowCopy2);
TEST_CASE(rethrowCopy3);
TEST_CASE(rethrowCopy4);
TEST_CASE(rethrowCopy5);
TEST_CASE(catchExceptionByValue);
}
void check(const char code[], bool inconclusive = false) {
// Clear the error buffer..
errout.str("");
Settings settings;
settings.addEnabled("all");
settings.inconclusive = inconclusive;
// Tokenize..
Tokenizer tokenizer(&settings, this);
std::istringstream istr(code);
tokenizer.tokenize(istr, "test.cpp");
// Check char variable usage..
CheckExceptionSafety checkExceptionSafety(&tokenizer, &settings, this);
checkExceptionSafety.runSimplifiedChecks(&tokenizer, &settings, this);
}
void destructors() {
check("class x {\n"
" ~x() {\n"
" throw e;\n"
" }\n"
"};");
ASSERT_EQUALS("[test.cpp:3]: (error) Exception thrown in destructor.\n", errout.str());
check("class x {\n"
" ~x();\n"
"};\n"
"x::~x() {\n"
" throw e;\n"
"}");
ASSERT_EQUALS("[test.cpp:5]: (error) Exception thrown in destructor.\n", errout.str());
check("x::~x() {\n"
" throw e;\n"
"}");
TODO_ASSERT_EQUALS("[test.cpp:3]: (error) Exception thrown in destructor.\n", "", errout.str());
// #3858 - throwing exception in try block in destructor.
check("class x {\n"
" ~x() {\n"
" try {\n"
" throw e;\n"
" } catch (...) {\n"
" }\n"
" }\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void deallocThrow1() {
check("int * p;\n"
"void f(int x) {\n"
" delete p;\n"
" if (x)\n"
" throw 123;\n"
" p = 0;\n"
"}");
ASSERT_EQUALS("[test.cpp:5]: (warning) Exception thrown in invalid state, 'p' points at deallocated memory.\n", errout.str());
check("void f() {\n"
" static int* p = foo;\n"
" delete p;\n"
" if (foo)\n"
" throw 1;\n"
" p = 0;\n"
"}");
ASSERT_EQUALS("[test.cpp:5]: (warning) Exception thrown in invalid state, 'p' points at deallocated memory.\n", errout.str());
}
void deallocThrow2() {
check("void f() {\n"
" int* p = 0;\n"
" delete p;\n"
" if (foo)\n"
" throw 1;\n"
" p = new int;\n"
"}", true);
ASSERT_EQUALS("", errout.str());
check("void f() {\n"
" static int* p = 0;\n"
" delete p;\n"
" reset(p);\n"
" throw 1;\n"
"}", true);
ASSERT_EQUALS("", errout.str());
}
void deallocThrow3() {
check("void f() {\n"
" static int* p = 0;\n"
" delete p;\n"
" throw 1;\n"
"}");
ASSERT_EQUALS("", errout.str());
check("void f() {\n"
" static int* p = 0;\n"
" delete p;\n"
" throw 1;\n"
"}", true);
ASSERT_EQUALS("[test.cpp:4]: (warning) Exception thrown in invalid state, 'p' points at deallocated memory.\n", errout.str());
}
void rethrowCopy1() {
check("void f() {\n"
" try\n"
" {\n"
" foo();\n"
" }\n"
" catch(const exception& err)\n"
" {\n"
" throw err;\n"
" }\n"
"}\n");
ASSERT_EQUALS("[test.cpp:8]: (style) Throwing a copy of the caught exception instead of rethrowing the original exception.\n", errout.str());
}
void rethrowCopy2() {
check("void f() {\n"
" try\n"
" {\n"
" foo();\n"
" }\n"
" catch(exception& err)\n"
" {\n"
" throw err;\n"
" }\n"
"}\n");
ASSERT_EQUALS("[test.cpp:8]: (style) Throwing a copy of the caught exception instead of rethrowing the original exception.\n", errout.str());
}
void rethrowCopy3() {
check("void f() {\n"
" try {\n"
" foo();\n"
" }\n"
" catch(std::runtime_error& err) {\n"
" throw err;\n"
" }\n"
"}");
ASSERT_EQUALS("[test.cpp:6]: (style) Throwing a copy of the caught exception instead of rethrowing the original exception.\n", errout.str());
}
void rethrowCopy4() {
check("void f() {\n"
" try\n"
" {\n"
" foo();\n"
" }\n"
" catch(const exception& err)\n"
" {\n"
" exception err2;\n"
" throw err2;\n"
" }\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void rethrowCopy5() {
check("void f() {\n"
" try {\n"
" foo();\n"
" }\n"
" catch(const exception& outer) {\n"
" try {\n"
" foo(outer);\n"
" }\n"
" catch(const exception& inner) {\n"
" throw inner;\n"
" }\n"
" }\n"
"}");
ASSERT_EQUALS("[test.cpp:10]: (style) Throwing a copy of the caught exception instead of rethrowing the original exception.\n", errout.str());
check("void f() {\n"
" try {\n"
" foo();\n"
" }\n"
" catch(const exception& outer) {\n"
" try {\n"
" foo(outer);\n"
" }\n"
" catch(const exception& inner) {\n"
" throw outer;\n"
" }\n"
" }\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void catchExceptionByValue() {
check("void f() {\n"
" try {\n"
" bar();\n"
" }\n"
" catch( ::std::exception err) {\n"
" foo(err);\n"
" }\n"
"}");
ASSERT_EQUALS("[test.cpp:5]: (style) Exception should be caught by reference.\n", errout.str());
check("void f() {\n"
" try {\n"
" bar();\n"
" }\n"
" catch(const exception err) {\n"
" foo(err);\n"
" }\n"
"}");
ASSERT_EQUALS("[test.cpp:5]: (style) Exception should be caught by reference.\n", errout.str());
check("void f() {\n"
" try {\n"
" bar();\n"
" }\n"
" catch( ::std::exception& err) {\n"
" foo(err);\n"
" }\n"
"}");
ASSERT_EQUALS("", errout.str());
check("void f() {\n"
" try {\n"
" bar();\n"
" }\n"
" catch(exception* err) {\n"
" foo(err);\n"
" }\n"
"}");
ASSERT_EQUALS("", errout.str());
check("void f() {\n"
" try {\n"
" bar();\n"
" }\n"
" catch(const exception& err) {\n"
" foo(err);\n"
" }\n"
"}");
ASSERT_EQUALS("", errout.str());
check("void f() {\n"
" try {\n"
" bar();\n"
" }\n"
" catch(int err) {\n"
" foo(err);\n"
" }\n"
"}");
ASSERT_EQUALS("", errout.str());
check("void f() {\n"
" try {\n"
" bar();\n"
" }\n"
" catch(exception* const err) {\n"
" foo(err);\n"
" }\n"
"}");
ASSERT_EQUALS("", errout.str());
}
};
REGISTER_TEST(TestExceptionSafety)
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