/*
* Cppcheck - A tool for static C/C++ code analysis
* Copyright (C) 2007-2017 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 .
*/
#include
#include "checkfunctions.h"
#include "library.h"
#include "settings.h"
#include "standards.h"
#include "testsuite.h"
#include "tokenize.h"
class TestFunctions : public TestFixture {
public:
TestFunctions() : TestFixture("TestFunctions") {
}
private:
Settings settings;
void run() {
settings.addEnabled("style");
settings.addEnabled("warning");
settings.addEnabled("portability");
settings.standards.posix = true;
settings.standards.c = Standards::C11;
settings.standards.cpp = Standards::CPP11;
LOAD_LIB_2(settings.library, "std.cfg");
LOAD_LIB_2(settings.library, "posix.cfg");
// Prohibited functions
TEST_CASE(prohibitedFunctions_posix);
TEST_CASE(prohibitedFunctions_index);
TEST_CASE(prohibitedFunctions_qt_index); // FP when using the Qt function 'index'?
TEST_CASE(prohibitedFunctions_rindex);
TEST_CASE(prohibitedFunctions_var); // no false positives for variables
TEST_CASE(prohibitedFunctions_gets); // dangerous function
TEST_CASE(prohibitedFunctions_alloca);
TEST_CASE(prohibitedFunctions_declaredFunction); // declared function ticket #3121
TEST_CASE(prohibitedFunctions_std_gets); // test std::gets
TEST_CASE(prohibitedFunctions_multiple); // multiple use of obsolete functions
TEST_CASE(prohibitedFunctions_c_declaration); // c declared function
TEST_CASE(prohibitedFunctions_functionWithBody); // function with body
TEST_CASE(prohibitedFunctions_crypt); // Non-reentrant function
TEST_CASE(prohibitedFunctions_namespaceHandling);
// Invalid function usage
TEST_CASE(invalidFunctionUsage1);
// Math function usage
TEST_CASE(mathfunctionCall_fmod);
TEST_CASE(mathfunctionCall_sqrt);
TEST_CASE(mathfunctionCall_log);
TEST_CASE(mathfunctionCall_acos);
TEST_CASE(mathfunctionCall_asin);
TEST_CASE(mathfunctionCall_pow);
TEST_CASE(mathfunctionCall_atan2);
TEST_CASE(mathfunctionCall_precision);
// Ignored return value
TEST_CASE(checkIgnoredReturnValue);
// memset..
TEST_CASE(memsetZeroBytes);
TEST_CASE(memsetInvalid2ndParam);
}
void check(const char code[], const char filename[]="test.cpp", const Settings* settings_=nullptr) {
// Clear the error buffer..
errout.str("");
if (!settings_)
settings_ = &settings;
// Tokenize..
Tokenizer tokenizer(settings_, this);
std::istringstream istr(code);
tokenizer.tokenize(istr, filename);
CheckFunctions checkFunctions(&tokenizer, settings_, this);
checkFunctions.runChecks(&tokenizer, settings_, this);
// Simplify...
tokenizer.simplifyTokenList2();
// Check...
checkFunctions.runSimplifiedChecks(&tokenizer, settings_, this);
}
void prohibitedFunctions_posix() {
check("void f()\n"
"{\n"
" bsd_signal(SIGABRT, SIG_IGN);\n"
"}");
ASSERT_EQUALS("[test.cpp:3]: (style) Obsolescent function 'bsd_signal' called. It is recommended to use 'sigaction' instead.\n", errout.str());
check("int f()\n"
"{\n"
" int bsd_signal(0);\n"
" return bsd_signal;\n"
"}");
ASSERT_EQUALS("", errout.str());
check("void f()\n"
"{\n"
" struct hostent *hp;\n"
" if(!hp = gethostbyname(\"127.0.0.1\")) {\n"
" exit(1);\n"
" }\n"
"}");
ASSERT_EQUALS("[test.cpp:4]: (style) Obsolescent function 'gethostbyname' called. It is recommended to use 'getaddrinfo' instead.\n", errout.str());
check("void f()\n"
"{\n"
" long addr;\n"
" addr = inet_addr(\"127.0.0.1\");\n"
" if(!hp = gethostbyaddr((char *) &addr, sizeof(addr), AF_INET)) {\n"
" exit(1);\n"
" }\n"
"}");
ASSERT_EQUALS("[test.cpp:5]: (style) Obsolescent function 'gethostbyaddr' called. It is recommended to use 'getnameinfo' instead.\n", errout.str());
check("void f()\n"
"{\n"
" usleep( 1000 );\n"
"}");
ASSERT_EQUALS("[test.cpp:3]: (style) Obsolescent function 'usleep' called. It is recommended to use 'nanosleep' or 'setitimer' instead.\n", errout.str());
}
void prohibitedFunctions_index() {
check("namespace n1 {\n"
" int index(){};\n"
"}\n"
"int main()\n"
"{\n"
" n1::index();\n"
"}");
ASSERT_EQUALS("", errout.str());
check("std::size_t f()\n"
"{\n"
" std::size_t index(0);\n"
" index++;\n"
" return index;\n"
"}");
ASSERT_EQUALS("", errout.str());
check("int f()\n"
"{\n"
" return this->index();\n"
"}");
ASSERT_EQUALS("", errout.str());
check("void f()\n"
"{\n"
" int index( 0 );\n"
"}");
ASSERT_EQUALS("", errout.str());
check("const char f()\n"
"{\n"
" const char var[6] = \"index\";\n"
" const char i = index(var, 0);\n"
" return i;\n"
"}");
ASSERT_EQUALS("[test.cpp:4]: (style) Obsolescent function 'index' called. It is recommended to use 'strchr' instead.\n",
errout.str());
}
void prohibitedFunctions_qt_index() {
check("void TDataModel::forceRowRefresh(int row) {\n"
" emit dataChanged(index(row, 0), index(row, columnCount() - 1));\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (style) Obsolescent function 'index' called. It is recommended to use 'strchr' instead.\n", errout.str());
}
void prohibitedFunctions_rindex() {
check("void f()\n"
"{\n"
" int rindex( 0 );\n"
"}");
ASSERT_EQUALS("", errout.str());
check("void f()\n"
"{\n"
" const char var[7] = \"rindex\";\n"
" print(rindex(var, 0));\n"
"}");
ASSERT_EQUALS("[test.cpp:4]: (style) Obsolescent function 'rindex' called. It is recommended to use 'strrchr' instead.\n", errout.str());
}
void prohibitedFunctions_var() {
check("class Fred {\n"
"public:\n"
" Fred() : index(0) { }\n"
" int index;\n"
"};");
ASSERT_EQUALS("", errout.str());
}
void prohibitedFunctions_gets() {
check("void f()\n"
"{\n"
" char *x = gets(a);\n"
"}");
ASSERT_EQUALS("[test.cpp:3]: (warning) Obsolete function 'gets' called. It is recommended to use 'fgets' or 'gets_s' instead.\n", errout.str());
check("void f()\n"
"{\n"
" foo(x, gets(a));\n"
"}");
ASSERT_EQUALS("[test.cpp:3]: (warning) Obsolete function 'gets' called. It is recommended to use 'fgets' or 'gets_s' instead.\n", errout.str());
}
void prohibitedFunctions_alloca() {
check("void f()\n"
"{\n"
" char *x = alloca(10);\n"
"}", "test.cpp"); // #4382 - there are no VLAs in C++
ASSERT_EQUALS("[test.cpp:3]: (warning) Obsolete function 'alloca' called.\n", errout.str());
check("void f()\n"
"{\n"
" char *x = alloca(10);\n"
"}", "test.c");
ASSERT_EQUALS("[test.c:3]: (warning) Obsolete function 'alloca' called. In C99 and later it is recommended to use a variable length array instead.\n", errout.str());
settings.standards.c = Standards::C89;
settings.standards.cpp = Standards::CPP03;
check("void f()\n"
"{\n"
" char *x = alloca(10);\n"
"}", "test.cpp"); // #4382 - there are no VLAs in C++
ASSERT_EQUALS("", errout.str());
check("void f()\n"
"{\n"
" char *x = alloca(10);\n"
"}", "test.c"); // #7558 - no alternative to alloca in C89
ASSERT_EQUALS("", errout.str());
check("void f()\n"
"{\n"
" char *x = alloca(10);\n"
"}", "test.c");
ASSERT_EQUALS("", errout.str());
settings.standards.c = Standards::C11;
settings.standards.cpp = Standards::CPP11;
}
// ticket #3121
void prohibitedFunctions_declaredFunction() {
check("int ftime ( int a )\n"
"{\n"
" return a;\n"
"}\n"
"int main ()\n"
"{\n"
" int b ; b = ftime ( 1 ) ;\n"
" return 0 ;\n"
"}");
ASSERT_EQUALS("", errout.str());
}
// test std::gets
void prohibitedFunctions_std_gets() {
check("void f(char * str)\n"
"{\n"
" char *x = std::gets(str);\n"
" char *y = gets(str);\n"
"}");
ASSERT_EQUALS("[test.cpp:3]: (warning) Obsolete function 'gets' called. It is recommended to use 'fgets' or 'gets_s' instead.\n"
"[test.cpp:4]: (warning) Obsolete function 'gets' called. It is recommended to use 'fgets' or 'gets_s' instead.\n", errout.str());
}
// multiple use
void prohibitedFunctions_multiple() {
check("void f(char * str)\n"
"{\n"
" char *x = std::gets(str);\n"
" usleep( 1000 );\n"
"}");
ASSERT_EQUALS("[test.cpp:3]: (warning) Obsolete function 'gets' called. It is recommended to use 'fgets' or 'gets_s' instead.\n"
"[test.cpp:4]: (style) Obsolescent function 'usleep' called. It is recommended to use 'nanosleep' or 'setitimer' instead.\n", errout.str());
}
void prohibitedFunctions_c_declaration() {
check("char * gets ( char * c ) ;\n"
"int main ()\n"
"{\n"
" char s [ 10 ] ;\n"
" gets ( s ) ;\n"
"}");
ASSERT_EQUALS("[test.cpp:5]: (warning) Obsolete function 'gets' called. It is recommended to use 'fgets' or 'gets_s' instead.\n", errout.str());
check("int getcontext(ucontext_t *ucp);\n"
"int f (ucontext_t *ucp)\n"
"{\n"
" getcontext ( ucp ) ;\n"
"}");
ASSERT_EQUALS("[test.cpp:4]: (portability) Obsolescent function 'getcontext' called. Applications are recommended to be rewritten to use POSIX threads.\n", errout.str());
}
void prohibitedFunctions_functionWithBody() {
check("char * gets ( char * c ) { return c; }\n"
"int main ()\n"
"{\n"
" char s [ 10 ] ;\n"
" gets ( s ) ;\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void prohibitedFunctions_crypt() {
check("void f(char *pwd)\n"
"{\n"
" char *cpwd;"
" crypt(pwd, cpwd);\n"
"}");
ASSERT_EQUALS("[test.cpp:3]: (warning) Return value of function crypt() is not used.\n"
"[test.cpp:3]: (portability) Non reentrant function 'crypt' called. For threadsafe applications it is recommended to use the reentrant replacement function 'crypt_r'.\n", errout.str());
check("void f()\n"
"{\n"
" char *pwd = getpass(\"Password:\");"
" char *cpwd;"
" crypt(pwd, cpwd);\n"
"}");
ASSERT_EQUALS("[test.cpp:3]: (warning) Return value of function crypt() is not used.\n"
"[test.cpp:3]: (portability) Non reentrant function 'crypt' called. For threadsafe applications it is recommended to use the reentrant replacement function 'crypt_r'.\n", errout.str());
check("int f()\n"
"{\n"
" int crypt = 0;"
" return crypt;\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void prohibitedFunctions_namespaceHandling() {
check("int f()\n"
"{\n"
" time_t t = 0;"
" std::localtime(&t);\n"
"}");
ASSERT_EQUALS("[test.cpp:3]: (portability) Non reentrant function 'localtime' called. For threadsafe applications it is recommended to use the reentrant replacement function 'localtime_r'.\n", errout.str());
// Passed as function argument
check("int f()\n"
"{\n"
" printf(\"Magic guess: %d\", getpwent());\n"
"}");
ASSERT_EQUALS("[test.cpp:3]: (portability) Non reentrant function 'getpwent' called. For threadsafe applications it is recommended to use the reentrant replacement function 'getpwent_r'.\n", errout.str());
// Pass return value
check("int f()\n"
"{\n"
" time_t t = 0;"
" struct tm *foo = localtime(&t);\n"
"}");
ASSERT_EQUALS("[test.cpp:3]: (portability) Non reentrant function 'localtime' called. For threadsafe applications it is recommended to use the reentrant replacement function 'localtime_r'.\n", errout.str());
// Access via global namespace
check("int f()\n"
"{\n"
" ::getpwent();\n"
"}");
ASSERT_EQUALS("[test.cpp:3]: (warning) Return value of function getpwent() is not used.\n"
"[test.cpp:3]: (portability) Non reentrant function 'getpwent' called. For threadsafe applications it is recommended to use the reentrant replacement function 'getpwent_r'.\n", errout.str());
// Be quiet on function definitions
check("int getpwent()\n"
"{\n"
" return 123;\n"
"}");
ASSERT_EQUALS("", errout.str());
// Be quiet on other namespaces
check("int f()\n"
"{\n"
" foobar::getpwent();\n"
"}");
ASSERT_EQUALS("", errout.str());
// Be quiet on class member functions
check("int f()\n"
"{\n"
" foobar.getpwent();\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void invalidFunctionUsage1() {
check("int f() { memset(a,b,sizeof(a)!=12); }");
ASSERT_EQUALS("[test.cpp:1]: (error) Invalid memset() argument nr 3. A non-boolean value is required.\n", errout.str());
check("int f() { memset(a,b,sizeof(a)!=0); }");
ASSERT_EQUALS("[test.cpp:1]: (error) Invalid memset() argument nr 3. A non-boolean value is required.\n", errout.str());
check("int f() { memset(a,b,!c); }");
ASSERT_EQUALS("[test.cpp:1]: (error) Invalid memset() argument nr 3. A non-boolean value is required.\n", errout.str());
// Ticket #6990
check("int f(bool c) { memset(a,b,c); }");
ASSERT_EQUALS("[test.cpp:1]: (error) Invalid memset() argument nr 3. A non-boolean value is required.\n", errout.str());
check("int f() { memset(a,b,true); }");
ASSERT_EQUALS("[test.cpp:1]: (error) Invalid memset() argument nr 3. A non-boolean value is required.\n", errout.str());
// Ticket #6588 (c mode)
check("void record(char* buf, int n) {\n"
" memset(buf, 0, n < 255);\n" /* KO */
" memset(buf, 0, n < 255 ? n : 255);\n" /* OK */
"}", "test.c");
ASSERT_EQUALS("[test.c:2]: (error) Invalid memset() argument nr 3. A non-boolean value is required.\n", errout.str());
// Ticket #6588 (c++ mode)
check("void record(char* buf, int n) {\n"
" memset(buf, 0, n < 255);\n" /* KO */
" memset(buf, 0, n < 255 ? n : 255);\n" /* OK */
"}");
ASSERT_EQUALS("[test.cpp:2]: (error) Invalid memset() argument nr 3. A non-boolean value is required.\n", errout.str());
check("int f() { strtol(a,b,sizeof(a)!=12); }");
ASSERT_EQUALS("[test.cpp:1]: (error) Invalid strtol() argument nr 3. The value is 0 or 1 (boolean) but the valid values are '0,2:36'.\n", errout.str());
check("int f() { strtol(a,b,1); }");
ASSERT_EQUALS("[test.cpp:1]: (error) Invalid strtol() argument nr 3. The value is 1 but the valid values are '0,2:36'.\n", errout.str());
check("int f() { strtol(a,b,10); }");
ASSERT_EQUALS("", errout.str());
}
void mathfunctionCall_sqrt() {
// sqrt, sqrtf, sqrtl
check("void foo()\n"
"{\n"
" std::cout << sqrt(-1) << std::endl;\n"
" std::cout << sqrtf(-1) << std::endl;\n"
" std::cout << sqrtl(-1) << std::endl;\n"
"}");
ASSERT_EQUALS("[test.cpp:3]: (warning) Passing value -1 to sqrt() leads to implementation-defined result.\n"
"[test.cpp:4]: (warning) Passing value -1 to sqrtf() leads to implementation-defined result.\n"
"[test.cpp:5]: (warning) Passing value -1 to sqrtl() leads to implementation-defined result.\n", errout.str());
// implementation-defined behaviour for "finite values of x<0" only:
check("void foo()\n"
"{\n"
" std::cout << sqrt(-0.) << std::endl;\n"
" std::cout << sqrtf(-0.) << std::endl;\n"
" std::cout << sqrtl(-0.) << std::endl;\n"
"}");
ASSERT_EQUALS("", errout.str());
check("void foo()\n"
"{\n"
" std::cout << sqrt(1) << std::endl;\n"
" std::cout << sqrtf(1) << std::endl;\n"
" std::cout << sqrtl(1) << std::endl;\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void mathfunctionCall_log() {
// log,log10,logf,logl,log10f,log10l
check("void foo()\n"
"{\n"
" std::cout << log(-2) << std::endl;\n"
" std::cout << logf(-2) << std::endl;\n"
" std::cout << logl(-2) << std::endl;\n"
"}");
ASSERT_EQUALS("[test.cpp:3]: (warning) Passing value -2 to log() leads to implementation-defined result.\n"
"[test.cpp:4]: (warning) Passing value -2 to logf() leads to implementation-defined result.\n"
"[test.cpp:5]: (warning) Passing value -2 to logl() leads to implementation-defined result.\n", errout.str());
check("void foo()\n"
"{\n"
" std::cout << log(-1) << std::endl;\n"
" std::cout << logf(-1) << std::endl;\n"
" std::cout << logl(-1) << std::endl;\n"
"}");
ASSERT_EQUALS("[test.cpp:3]: (warning) Passing value -1 to log() leads to implementation-defined result.\n"
"[test.cpp:4]: (warning) Passing value -1 to logf() leads to implementation-defined result.\n"
"[test.cpp:5]: (warning) Passing value -1 to logl() leads to implementation-defined result.\n", errout.str());
check("void foo()\n"
"{\n"
" std::cout << log(-1.0) << std::endl;\n"
" std::cout << logf(-1.0) << std::endl;\n"
" std::cout << logl(-1.0) << std::endl;\n"
"}");
ASSERT_EQUALS("[test.cpp:3]: (warning) Passing value -1.0 to log() leads to implementation-defined result.\n"
"[test.cpp:4]: (warning) Passing value -1.0 to logf() leads to implementation-defined result.\n"
"[test.cpp:5]: (warning) Passing value -1.0 to logl() leads to implementation-defined result.\n", errout.str());
check("void foo()\n"
"{\n"
" std::cout << log(-0.1) << std::endl;\n"
" std::cout << logf(-0.1) << std::endl;\n"
" std::cout << logl(-0.1) << std::endl;\n"
"}");
ASSERT_EQUALS("[test.cpp:3]: (warning) Passing value -0.1 to log() leads to implementation-defined result.\n"
"[test.cpp:4]: (warning) Passing value -0.1 to logf() leads to implementation-defined result.\n"
"[test.cpp:5]: (warning) Passing value -0.1 to logl() leads to implementation-defined result.\n", errout.str());
check("void foo()\n"
"{\n"
" std::cout << log(0) << std::endl;\n"
" std::cout << logf(0.) << std::endl;\n"
" std::cout << logl(0.0) << std::endl;\n"
"}");
ASSERT_EQUALS("[test.cpp:3]: (warning) Passing value 0 to log() leads to implementation-defined result.\n"
"[test.cpp:4]: (warning) Passing value 0. to logf() leads to implementation-defined result.\n"
"[test.cpp:5]: (warning) Passing value 0.0 to logl() leads to implementation-defined result.\n", errout.str());
check("void foo()\n"
"{\n"
" std::cout << log(1E-3) << std::endl;\n"
" std::cout << logf(1E-3) << std::endl;\n"
" std::cout << logl(1E-3) << std::endl;\n"
" std::cout << log(1.0E-3) << std::endl;\n"
" std::cout << logf(1.0E-3) << std::endl;\n"
" std::cout << logl(1.0E-3) << std::endl;\n"
" std::cout << log(1.0E+3) << std::endl;\n"
" std::cout << logf(1.0E+3) << std::endl;\n"
" std::cout << logl(1.0E+3) << std::endl;\n"
" std::cout << log(2.0) << std::endl;\n"
" std::cout << logf(2.0) << std::endl;\n"
" std::cout << logf(2.0f) << std::endl;\n"
"}");
ASSERT_EQUALS("", errout.str());
check("void foo()\n"
"{\n"
" std::string *log(0);\n"
"}");
ASSERT_EQUALS("", errout.str());
// #3473 - no warning if "log" is a variable
check("Fred::Fred() : log(0) { }");
ASSERT_EQUALS("", errout.str());
// #5748
check("void f() { foo.log(0); }");
ASSERT_EQUALS("", errout.str());
}
void mathfunctionCall_acos() {
// acos, acosf, acosl
check("void foo()\n"
"{\n"
" return acos(-1) \n"
" + acos(0.1) \n"
" + acos(0.0001) \n"
" + acos(0.01) \n"
" + acos(1.0E-1) \n"
" + acos(-1.0E-1) \n"
" + acos(+1.0E-1) \n"
" + acos(0.1E-1) \n"
" + acos(+0.1E-1) \n"
" + acos(-0.1E-1) \n"
" + acosf(-1) \n"
" + acosf(0.1) \n"
" + acosf(0.0001) \n"
" + acosf(0.01) \n"
" + acosf(1.0E-1) \n"
" + acosf(-1.0E-1) \n"
" + acosf(+1.0E-1) \n"
" + acosf(0.1E-1) \n"
" + acosf(+0.1E-1) \n"
" + acosf(-0.1E-1) \n"
" + acosl(-1) \n"
" + acosl(0.1) \n"
" + acosl(0.0001) \n"
" + acosl(0.01) \n"
" + acosl(1.0E-1) \n"
" + acosl(-1.0E-1) \n"
" + acosl(+1.0E-1) \n"
" + acosl(0.1E-1) \n"
" + acosl(+0.1E-1) \n"
" + acosl(-0.1E-1); \n"
"}");
ASSERT_EQUALS("", errout.str());
check("void foo()\n"
"{\n"
" std::cout << acos(1.1) << std::endl;\n"
" std::cout << acosf(1.1) << std::endl;\n"
" std::cout << acosl(1.1) << std::endl;\n"
"}");
ASSERT_EQUALS("[test.cpp:3]: (warning) Passing value 1.1 to acos() leads to implementation-defined result.\n"
"[test.cpp:4]: (warning) Passing value 1.1 to acosf() leads to implementation-defined result.\n"
"[test.cpp:5]: (warning) Passing value 1.1 to acosl() leads to implementation-defined result.\n", errout.str());
check("void foo()\n"
"{\n"
" std::cout << acos(-1.1) << std::endl;\n"
" std::cout << acosf(-1.1) << std::endl;\n"
" std::cout << acosl(-1.1) << std::endl;\n"
"}");
ASSERT_EQUALS("[test.cpp:3]: (warning) Passing value -1.1 to acos() leads to implementation-defined result.\n"
"[test.cpp:4]: (warning) Passing value -1.1 to acosf() leads to implementation-defined result.\n"
"[test.cpp:5]: (warning) Passing value -1.1 to acosl() leads to implementation-defined result.\n", errout.str());
}
void mathfunctionCall_asin() {
// asin, asinf, asinl
check("void foo()\n"
"{\n"
" return asin(1) \n"
" + asin(-1) \n"
" + asin(0.1) \n"
" + asin(0.0001) \n"
" + asin(0.01) \n"
" + asin(1.0E-1) \n"
" + asin(-1.0E-1) \n"
" + asin(+1.0E-1) \n"
" + asin(0.1E-1) \n"
" + asin(+0.1E-1) \n"
" + asin(-0.1E-1) \n"
" + asinf(1) \n"
" + asinf(-1) \n"
" + asinf(0.1) \n"
" + asinf(0.0001) \n"
" + asinf(0.01) \n"
" + asinf(1.0E-1) \n"
" + asinf(-1.0E-1) \n"
" + asinf(+1.0E-1) \n"
" + asinf(0.1E-1) \n"
" + asinf(+0.1E-1) \n"
" + asinf(-0.1E-1) \n"
" + asinl(1) \n"
" + asinl(-1) \n"
" + asinl(0.1) \n"
" + asinl(0.0001) \n"
" + asinl(0.01) \n"
" + asinl(1.0E-1) \n"
" + asinl(-1.0E-1) \n"
" + asinl(+1.0E-1) \n"
" + asinl(0.1E-1) \n"
" + asinl(+0.1E-1) \n"
" + asinl(-0.1E-1); \n"
"}");
ASSERT_EQUALS("", errout.str());
check("void foo()\n"
"{\n"
" std::cout << asin(1.1) << std::endl;\n"
" std::cout << asinf(1.1) << std::endl;\n"
" std::cout << asinl(1.1) << std::endl;\n"
"}");
ASSERT_EQUALS("[test.cpp:3]: (warning) Passing value 1.1 to asin() leads to implementation-defined result.\n"
"[test.cpp:4]: (warning) Passing value 1.1 to asinf() leads to implementation-defined result.\n"
"[test.cpp:5]: (warning) Passing value 1.1 to asinl() leads to implementation-defined result.\n", errout.str());
check("void foo()\n"
"{\n"
" std::cout << asin(-1.1) << std::endl;\n"
" std::cout << asinf(-1.1) << std::endl;\n"
" std::cout << asinl(-1.1) << std::endl;\n"
"}");
ASSERT_EQUALS("[test.cpp:3]: (warning) Passing value -1.1 to asin() leads to implementation-defined result.\n"
"[test.cpp:4]: (warning) Passing value -1.1 to asinf() leads to implementation-defined result.\n"
"[test.cpp:5]: (warning) Passing value -1.1 to asinl() leads to implementation-defined result.\n", errout.str());
}
void mathfunctionCall_pow() {
// pow, powf, powl
check("void foo()\n"
"{\n"
" std::cout << pow(0,-10) << std::endl;\n"
" std::cout << powf(0,-10) << std::endl;\n"
" std::cout << powl(0,-10) << std::endl;\n"
"}");
ASSERT_EQUALS("[test.cpp:3]: (warning) Passing values 0 and -10 to pow() leads to implementation-defined result.\n"
"[test.cpp:4]: (warning) Passing values 0 and -10 to powf() leads to implementation-defined result.\n"
"[test.cpp:5]: (warning) Passing values 0 and -10 to powl() leads to implementation-defined result.\n", errout.str());
check("void foo()\n"
"{\n"
" std::cout << pow(0,10) << std::endl;\n"
" std::cout << powf(0,10) << std::endl;\n"
" std::cout << powl(0,10) << std::endl;\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void mathfunctionCall_atan2() {
// atan2
check("void foo()\n"
"{\n"
" std::cout << atan2(1,1) ;\n"
" std::cout << atan2(-1,-1) ;\n"
" std::cout << atan2(0.1,1) ;\n"
" std::cout << atan2(0.0001,100) ;\n"
" std::cout << atan2(0.0,1e-1) ;\n"
" std::cout << atan2(1.0E-1,-3) ;\n"
" std::cout << atan2(-1.0E-1,+2) ;\n"
" std::cout << atan2(+1.0E-1,0) ;\n"
" std::cout << atan2(0.1E-1,3) ;\n"
" std::cout << atan2(+0.1E-1,1) ;\n"
" std::cout << atan2(-0.1E-1,8) ;\n"
" std::cout << atan2f(1,1) ;\n"
" std::cout << atan2f(-1,-1) ;\n"
" std::cout << atan2f(0.1,1) ;\n"
" std::cout << atan2f(0.0001,100) ;\n"
" std::cout << atan2f(0.0,1e-1) ;\n"
" std::cout << atan2f(1.0E-1,-3) ;\n"
" std::cout << atan2f(-1.0E-1,+2) ;\n"
" std::cout << atan2f(+1.0E-1,0) ;\n"
" std::cout << atan2f(0.1E-1,3) ;\n"
" std::cout << atan2f(+0.1E-1,1) ;\n"
" std::cout << atan2f(-0.1E-1,8) ;\n"
" std::cout << atan2l(1,1) ;\n"
" std::cout << atan2l(-1,-1) ;\n"
" std::cout << atan2l(0.1,1) ;\n"
" std::cout << atan2l(0.0001,100) ;\n"
" std::cout << atan2l(0.0,1e-1) ;\n"
" std::cout << atan2l(1.0E-1,-3) ;\n"
" std::cout << atan2l(-1.0E-1,+2) ;\n"
" std::cout << atan2l(+1.0E-1,0) ;\n"
" std::cout << atan2l(0.1E-1,3) ;\n"
" std::cout << atan2l(+0.1E-1,1) ;\n"
" std::cout << atan2l(-0.1E-1,8) ;\n"
"}");
ASSERT_EQUALS("", errout.str());
check("void foo()\n"
"{\n"
" std::cout << atan2(0,0) << std::endl;\n"
" std::cout << atan2f(0,0) << std::endl;\n"
" std::cout << atan2l(0,0) << std::endl;\n"
"}");
ASSERT_EQUALS("[test.cpp:3]: (warning) Passing values 0 and 0 to atan2() leads to implementation-defined result.\n"
"[test.cpp:4]: (warning) Passing values 0 and 0 to atan2f() leads to implementation-defined result.\n"
"[test.cpp:5]: (warning) Passing values 0 and 0 to atan2l() leads to implementation-defined result.\n", errout.str());
}
void mathfunctionCall_fmod() {
// fmod, fmodl, fmodf
check("void foo()\n"
"{\n"
" std::cout << fmod(1.0,0) << std::endl;\n"
" std::cout << fmodf(1.0,0) << std::endl;\n"
" std::cout << fmodl(1.0,0) << std::endl;\n"
"}");
ASSERT_EQUALS("[test.cpp:3]: (warning) Passing values 1.0 and 0 to fmod() leads to implementation-defined result.\n"
"[test.cpp:4]: (warning) Passing values 1.0 and 0 to fmodf() leads to implementation-defined result.\n"
"[test.cpp:5]: (warning) Passing values 1.0 and 0 to fmodl() leads to implementation-defined result.\n", errout.str());
check("void foo()\n"
"{\n"
" std::cout << fmod(1.0,1) << std::endl;\n"
" std::cout << fmodf(1.0,1) << std::endl;\n"
" std::cout << fmodl(1.0,1) << std::endl;\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void mathfunctionCall_precision() {
check("void foo() {\n"
" print(exp(x) - 1);\n"
" print(log(1 + x));\n"
" print(1 - erf(x));\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (style) Expression 'exp(x) - 1' can be replaced by 'expm1(x)' to avoid loss of precision.\n"
"[test.cpp:3]: (style) Expression 'log(1 + x)' can be replaced by 'log1p(x)' to avoid loss of precision.\n"
"[test.cpp:4]: (style) Expression '1 - erf(x)' can be replaced by 'erfc(x)' to avoid loss of precision.\n", errout.str());
check("void foo() {\n"
" print(exp(x) - 1.0);\n"
" print(log(1.0 + x));\n"
" print(1.0 - erf(x));\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (style) Expression 'exp(x) - 1' can be replaced by 'expm1(x)' to avoid loss of precision.\n"
"[test.cpp:3]: (style) Expression 'log(1 + x)' can be replaced by 'log1p(x)' to avoid loss of precision.\n"
"[test.cpp:4]: (style) Expression '1 - erf(x)' can be replaced by 'erfc(x)' to avoid loss of precision.\n", errout.str());
check("void foo() {\n"
" print(exp(3 + x*f(a)) - 1);\n"
" print(log(x*4 + 1));\n"
" print(1 - erf(34*x + f(x) - c));\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (style) Expression 'exp(x) - 1' can be replaced by 'expm1(x)' to avoid loss of precision.\n"
"[test.cpp:3]: (style) Expression 'log(1 + x)' can be replaced by 'log1p(x)' to avoid loss of precision.\n"
"[test.cpp:4]: (style) Expression '1 - erf(x)' can be replaced by 'erfc(x)' to avoid loss of precision.\n", errout.str());
check("void foo() {\n"
" print(2*exp(x) - 1);\n"
" print(1 - erf(x)/2.0);\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void checkIgnoredReturnValue() {
Settings settings2;
settings2.addEnabled("warning");
const char xmldata[] = "\n"
"\n"
" \n"
" \n"
" \n"
" \n"
" \n"
"";
tinyxml2::XMLDocument doc;
doc.Parse(xmldata, sizeof(xmldata));
settings2.library.load(doc);
check("void foo() {\n"
" mystrcmp(a, b);\n"
"}", "test.cpp", &settings2);
ASSERT_EQUALS("[test.cpp:2]: (warning) Return value of function mystrcmp() is not used.\n", errout.str());
check("void foo() {\n"
" foo::mystrcmp(a, b);\n"
"}", "test.cpp", &settings2);
ASSERT_EQUALS("[test.cpp:2]: (warning) Return value of function foo::mystrcmp() is not used.\n", errout.str());
check("void f() {\n"
" foo x;\n"
" x.mystrcmp(a, b);\n"
"}", "test.cpp", &settings2);
ASSERT_EQUALS("[test.cpp:3]: (warning) Return value of function x.mystrcmp() is not used.\n", errout.str());
check("bool mystrcmp(char* a, char* b);\n" // cppcheck sees a custom strcmp definition, but it returns a value. Assume it is the one specified in the library.
"void foo() {\n"
" mystrcmp(a, b);\n"
"}", "test.cpp", &settings2);
ASSERT_EQUALS("[test.cpp:3]: (warning) Return value of function mystrcmp() is not used.\n", errout.str());
check("void mystrcmp(char* a, char* b);\n" // cppcheck sees a custom strcmp definition which returns void!
"void foo() {\n"
" mystrcmp(a, b);\n"
"}", "test.cpp", &settings2);
ASSERT_EQUALS("", errout.str());
check("void foo() {\n"
" class mystrcmp { mystrcmp() {} };\n" // strcmp is a constructor definition here
"}", "test.cpp", &settings2);
ASSERT_EQUALS("", errout.str());
check("void foo() {\n"
" return mystrcmp(a, b);\n"
"}", "test.cpp", &settings2);
ASSERT_EQUALS("", errout.str());
check("void foo() {\n"
" return foo::mystrcmp(a, b);\n"
"}", "test.cpp", &settings2);
ASSERT_EQUALS("", errout.str());
check("void foo() {\n"
" if(mystrcmp(a, b));\n"
"}", "test.cpp", &settings2);
ASSERT_EQUALS("", errout.str());
check("void foo() {\n"
" bool b = mystrcmp(a, b);\n"
"}", "test.cpp", &settings2);
ASSERT_EQUALS("", errout.str());
// #6194
check("void foo() {\n"
" MyStrCmp mystrcmp(x, y);\n"
"}", "test.cpp", &settings2);
ASSERT_EQUALS("", errout.str());
// #6197
check("void foo() {\n"
" abc::def.mystrcmp(a,b);\n"
"}", "test.cpp", &settings2);
ASSERT_EQUALS("", errout.str());
// #6233
check("int main() {\n"
" auto lambda = [](double value) {\n"
" double rounded = floor(value + 0.5);\n"
" printf(\"Rounded value = %f\\n\", rounded);\n"
" };\n"
" lambda(13.3);\n"
" return 0;\n"
"}");
ASSERT_EQUALS("", errout.str());
// #6669
check("void foo(size_t size) {\n"
" void * res{malloc(size)};\n"
"}");
ASSERT_EQUALS("", errout.str());
// #7447
check("void foo() {\n"
" int x{mystrcmp(a,b)};\n"
"}", "test.cpp", &settings2);
ASSERT_EQUALS("", errout.str());
// #7905
check("void foo() {\n"
" int x({mystrcmp(a,b)});\n"
"}", "test.cpp", &settings2);
ASSERT_EQUALS("", errout.str());
// #7979 - code is not well configured
check("void foo() {\n"
" DEBUG(x(); mystrcmp(a,b););\n"
"}", "test.cpp", &settings2);
ASSERT_EQUALS("", errout.str());
check("void foo() {\n" // don't crash
" DEBUG(123)(mystrcmp(a,b))(fd);\n"
"}", "test.c", &settings2);
}
void memsetZeroBytes() {
check("void f() {\n"
" memset(p, 10, 0x0);\n"
"}\n");
ASSERT_EQUALS("[test.cpp:2]: (warning) memset() called to fill 0 bytes.\n", errout.str());
check("void f() {\n"
" memset(p, sizeof(p), 0);\n"
"}\n");
ASSERT_EQUALS("[test.cpp:2]: (warning) memset() called to fill 0 bytes.\n", errout.str());
check("void f() {\n"
" memset(p, sizeof(p), i);\n"
"}\n");
ASSERT_EQUALS("", errout.str());
// #6269 false positives in case of overloaded standard library functions
check("class c {\n"
" void memset( int i );\n"
" void f( void ) {\n"
" memset( 0 );\n"
" }\n"
"};");
ASSERT_EQUALS("", errout.str());
// #7285
check("void f() {\n"
" memset(&tm, sizeof(tm), 0);\n"
"}\n");
ASSERT_EQUALS("[test.cpp:2]: (warning) memset() called to fill 0 bytes.\n", errout.str());
}
void memsetInvalid2ndParam() {
check("void f() {\n"
" int* is = new int[10];\n"
" memset(is, 1.0f, 40);\n"
" int* is2 = new int[10];\n"
" memset(is2, 0.1f, 40);\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (portability) The 2nd memset() argument '1.0f' is a float, its representation is implementation defined.\n"
"[test.cpp:5]: (portability) The 2nd memset() argument '0.1f' is a float, its representation is implementation defined.\n", errout.str());
check("void f() {\n"
" int* is = new int[10];\n"
" float g = computeG();\n"
" memset(is, g, 40);\n"
"}\n");
ASSERT_EQUALS("[test.cpp:4]: (portability) The 2nd memset() argument 'g' is a float, its representation is implementation defined.\n", errout.str());
check("void f() {\n"
" int* is = new int[10];\n"
" memset(is, 0.0f, 40);\n"
"}\n");
ASSERT_EQUALS("", errout.str());
check("void f() {\n" // FP
" float x = 2.3f;\n"
" memset(a, (x?64:0), 40);\n"
"}\n");
ASSERT_EQUALS("", errout.str());
check("void f() {\n"
" short ss[] = {1, 2};\n"
" memset(ss, 256, 4);\n"
" short ss2[2];\n"
" memset(ss2, -129, 4);\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (warning) The 2nd memset() argument '256' doesn't fit into an 'unsigned char'.\n"
"[test.cpp:5]: (warning) The 2nd memset() argument '-129' doesn't fit into an 'unsigned char'.\n", errout.str());
check("void f() {\n"
" int is[10];\n"
" memset(is, 0xEE, 40);\n"
" unsigned char* cs = malloc(256);\n"
" memset(cs, -1, 256);\n"
" short* ss[30];\n"
" memset(ss, -128, 60);\n"
" char cs2[30];\n"
" memset(cs2, 255, 30);\n"
" char cs3[30];\n"
" memset(cs3, 0, 30);\n"
"}\n");
ASSERT_EQUALS("", errout.str());
check("void f() {\n"
" int is[10];\n"
" const int i = g();\n"
" memset(is, 1.0f + i, 40);\n"
"}\n");
ASSERT_EQUALS("[test.cpp:4]: (portability) The 2nd memset() argument '1.0f+i' is a float, its representation is implementation defined.\n", errout.str());
}
};
REGISTER_TEST(TestFunctions)