950 lines
24 KiB
C++
950 lines
24 KiB
C++
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// Unit-testing cppcheck
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//---------------------------------------------------------------------------
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#include "tokenize.h" // <- Tokenizer
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#include "CommonCheck.h"
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#include "CheckBufferOverrun.h"
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#include "CheckClass.h"
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#include "CheckMemoryLeak.h"
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#include "CheckOther.h"
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#include <iostream>
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#include <sstream>
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//---------------------------------------------------------------------------
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bool ShowAll = true;
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bool CheckCodingStyle = true;
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bool Debug = false;
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//---------------------------------------------------------------------------
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static unsigned int FailCount, SuccessCount;
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//---------------------------------------------------------------------------
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static void buffer_overrun();
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static void constructors();
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static void operator_eq();
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static void memleak_in_function();
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static void memleak_in_class();
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static void division();
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static void variable_scope();
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static void fpar_byvalue();
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static void unused_struct_member();
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//---------------------------------------------------------------------------
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int main()
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{
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// Provide a dummy filename for the error messages
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Files.push_back( std::string("test.cpp") );
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// Don't filter out duplicate error messages..
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OnlyReportUniqueErrors = false;
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// Check that buffer overruns are detected
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buffer_overrun();
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// Test the constructor-checks
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constructors();
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// Test the class operator= checking
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operator_eq();
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// Test that memory leaks in a function are detected
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memleak_in_function();
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// Test that memory leaks in a class are detected
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memleak_in_class();
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// Check for dangerous division.. such as "svar / uvar". Treating "svar" as unsigned data is not good
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division();
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// variable scope..
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variable_scope();
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fpar_byvalue();
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// unused struct member..
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unused_struct_member();
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// unused variable
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std::cout << "Success Rate: "
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<< SuccessCount
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<< " / "
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<< (SuccessCount + FailCount)
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<< std::endl;
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return 0;
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}
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//---------------------------------------------------------------------------
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static void check(void (chk)(),
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const unsigned int line,
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const char code[],
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const char msg[])
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{
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// Tokenize..
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tokens = tokens_back = NULL;
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std::istringstream istr(code);
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TokenizeCode( istr );
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if ( chk != CheckUnsignedDivision )
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SimplifyTokenList();
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FillFunctionList(0);
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// Check for buffer overruns..
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errout.str("");
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chk();
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// Check the error messages..
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std::string err( errout.str() );
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if ( err == msg )
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{
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SuccessCount++;
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}
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else
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{
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FailCount++;
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std::cerr << "Failed at line " << line << std::endl
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<< "Unexpected Result:" << std::endl
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<< err << std::endl;
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}
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// Cleanup..
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DeallocateTokens();
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}
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//---------------------------------------------------------------------------
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static void buffer_overrun()
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{
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// There are 3 sections..
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// 1. No errors
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// 2. Array index out of bounds
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// 3. Buffer overrun
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const char *code;
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////////////////////////////////////////////////
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// NO ERRORS
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////////////////////////////////////////////////
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code = "void f()\n"
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"{\n"
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" if (ab)\n"
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" {\n"
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" char str[50];\n"
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" }\n"
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" if (ab)\n"
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" {\n"
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" char str[50];\n"
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" }\n"
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"}\n";
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check( CheckBufferOverrun, __LINE__, code, "" );
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code = "void f1(char *str)\n"
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"{\n"
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" strcpy(buf,str);\n"
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"}\n"
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"void f2(char *str)\n"
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"{\n"
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" strcat(buf,str);\n"
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"}\n"
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"void f3(char *str)\n"
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"{\n"
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" sprintf(buf,\"%s\",str);\n"
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"}\n"
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"void f4(const char str[])\n"
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"{\n"
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" strcpy(buf, str);\n"
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"}\n";
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check( CheckBufferOverrun, __LINE__, code, "" );
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code = "static void f()\n"
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"{\n"
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" char data[1];\n"
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" return abc.data[1];\n"
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"}\n";
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check( CheckBufferOverrun, __LINE__, code, "" );
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// TODO
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/*
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code = "static void memclr( char *data, const int bytes )\n"
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"{\n"
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" for (int i = 0; i < bytes; i++)\n"
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" data[i] = 0;\n"
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"}\n"
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"\n"
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"static void f()\n"
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"{\n"
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" char str[5];\n"
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" memclr( str, 5 ); // OK\n"
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" memclr( str+1, 5 ); // ERROR\n"
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" memclr( str, 6 ); // ERROR\n"
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"}\n";
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check( CheckBufferOverrun, __LINE__, code, "" );
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*/
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////////////////////////////////////////////////
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// Array index out of bounds
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////////////////////////////////////////////////
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code = "void f()\n"
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"{\n"
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" char str[0x10];\n"
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" str[15] = 0;\n"
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" str[16] = 0;\n"
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"}\n";
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check( CheckBufferOverrun, __LINE__, code, "[test.cpp:5]: Array index out of bounds\n" );
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code = "void f()\n"
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"{\n"
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" char *str = new char[0x10];\n"
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" str[15] = 0;\n"
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" str[16] = 0;\n"
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"}\n";
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check( CheckBufferOverrun, __LINE__, code, "[test.cpp:5]: Array index out of bounds\n" );
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code = "void f()\n"
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"{\n"
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" int val[50];\n"
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" for (i = 0; i < 100; i++)\n"
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" sum += val[i];\n"
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"}\n";
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check( CheckBufferOverrun, __LINE__, code, "[test.cpp:5]: Buffer overrun\n" );
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code = "const int SIZE = 10;\n"
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"void f()\n"
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"{\n"
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" int i[SIZE];\n"
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" i[SIZE] = 0;\n"
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"}\n";
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check( CheckBufferOverrun, __LINE__, code, "[test.cpp:5]: Array index out of bounds\n" );
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code = "void f()\n"
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"{\n"
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" int i[10];\n"
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" i[ sizeof(i) - 1 ] = 0;\n"
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"}\n";
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check( CheckBufferOverrun, __LINE__, code, "[test.cpp:4]: Array index out of bounds\n" );
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code = "struct ABC\n"
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"{\n"
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" char str[10];\n"
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"};\n"
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"\n"
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"static void f()\n"
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"{\n"
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" struct ABC abc;\n"
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" abc.str[10] = 0;\n"
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"}\n";
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check( CheckBufferOverrun, __LINE__, code, "[test.cpp:9]: Array index out of bounds\n" );
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code = "struct ABC\n"
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"{\n"
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" char str[10];\n"
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"};\n"
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"\n"
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"static void f(ABC *abc)\n"
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"{\n"
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" abc->str[10] = 0;\n"
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"}\n";
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check( CheckBufferOverrun, __LINE__, code, "[test.cpp:8]: Array index out of bounds\n" );
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code = "const int SIZE = 10;\n"
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"\n"
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"struct ABC\n"
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"{\n"
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" char str[SIZE];\n"
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"};\n"
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"\n"
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"static void f()\n"
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"{\n"
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" struct ABC abc;\n"
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" abc.str[SIZE] = 0;\n"
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"}\n";
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check( CheckBufferOverrun, __LINE__, code, "[test.cpp:11]: Array index out of bounds\n" );
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code = "static void memclr( char *data )\n"
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"{\n"
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" data[10] = 0;\n"
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"}\n"
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"\n"
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"static void f()\n"
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"{\n"
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" char str[5];\n"
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" memclr( str ); // ERROR\n"
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"}\n";
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check( CheckBufferOverrun, __LINE__, code, "[test.cpp:9] -> [test.cpp:3]: Array index out of bounds\n" );
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code = "struct ABC\n"
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"{\n"
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" char str[10];\n"
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"};\n"
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"\n"
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"static void memclr( char *data )\n"
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"{\n"
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" data[10] = 0;\n"
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"}\n"
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"\n"
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"static void f(ABC *abc)\n"
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"{\n"
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" memclr(abc->str);\n"
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"}\n";
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check( CheckBufferOverrun, __LINE__, code, "[test.cpp:13] -> [test.cpp:8]: Array index out of bounds\n" );
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code = "class ABC\n"
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"{\n"
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"public:\n"
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" ABC();\n"
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" char *str[10];\n"
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" struct ABC *next;"
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"};\n"
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"\n"
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"static void f()\n"
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"{\n"
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" for ( ABC *abc = abc1; abc; abc = abc->next )\n"
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" {\n"
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" abc->str[10] = 0;\n"
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" }\n"
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"}\n";
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check( CheckBufferOverrun, __LINE__, code, "[test.cpp:12]: Array index out of bounds\n" );
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// TODO
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/*
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const char test[] = "class Fred\n"
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"{\n"
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"private:\n"
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" char str[10];\n"
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"public:\n"
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" Fred();\n"
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"};\n"
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"Fred::Fred()\n"
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"{\n"
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" str[10] = 0;\n"
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"}\n";
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check( CheckBufferOverrun, __LINE__, test, "[test.cpp:5]: Array index out of bounds\n" );
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*/
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////////////////////////////////////////////////
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// Buffer overrun
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////////////////////////////////////////////////
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code = "void f()\n"
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"{\n"
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" char str[3];\n"
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" strcpy(str, \"abc\");\n"
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"}\n";
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check( CheckBufferOverrun, __LINE__, code, "[test.cpp:4]: Buffer overrun\n" );
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code = "struct ABC\n"
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"{\n"
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" char str[5];\n"
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"};\n"
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"\n"
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"static void f(ABC *abc)\n"
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"{\n"
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" strcpy( abc->str, \"abcdef\" );\n"
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"}\n";
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check( CheckBufferOverrun, __LINE__, code, "[test.cpp:8]: Buffer overrun\n" );
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}
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//---------------------------------------------------------------------------
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static void constructors()
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{
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// Test1: No constructor
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// Test2: embedded constructor, uninitialized variable
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// Test3: Uninitialized variable
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// Test4: multiple constructors, uninitialized variable
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const char *code;
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code = "class Fred\n"
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"{\n"
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"public:\n"
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" int i;\n"
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"};\n";
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check( CheckConstructors, __LINE__, code, "[test.cpp:1] The class 'Fred' has no constructor\n" );
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code = "class Fred\n"
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"{\n"
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"public:\n"
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" Fred() { }\n"
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" int i;\n"
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"};\n";
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check( CheckConstructors, __LINE__, code, "[test.cpp:4] Uninitialized member variable 'Fred::i'\n" );
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code = "class Fred\n"
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"{\n"
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"public:\n"
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" Fred();\n"
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" int i;\n"
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"};\n"
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"Fred::Fred()\n"
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"{ }\n";
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check( CheckConstructors, __LINE__, code, "[test.cpp:7] Uninitialized member variable 'Fred::i'\n" );
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code = "class Fred\n"
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"{\n"
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"public:\n"
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" Fred();\n"
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" Fred(int _i);\n"
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" int i;\n"
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"};\n"
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"Fred::Fred()\n"
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"{ }\n"
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"Fred::Fred(int _i)\n"
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"{\n"
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" i = _i;\n"
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"}\n";
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check( CheckConstructors, __LINE__, code, "[test.cpp:8] Uninitialized member variable 'Fred::i'\n" );
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}
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//---------------------------------------------------------------------------
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static void operator_eq()
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{
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const char *code;
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code = "class Fred\n"
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"{\n"
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"public:\n"
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" void operator=(const int &value);\n"
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"};\n";
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check( CheckOperatorEq1, __LINE__, code, "[test.cpp:4]: 'operator=' should return something\n" );
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}
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//---------------------------------------------------------------------------
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static void memleak_in_function()
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{
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////////////////////////////////////////////////
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// for/while
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////////////////////////////////////////////////
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////////////////////////////////////////////////
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// Garbage collection
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////////////////////////////////////////////////
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code = "static char *f()\n"
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"{\n"
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" Fred *fred = new Fred;\n"
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" // fred is deleted automaticly\n"
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"}\n";
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check_( CheckMemoryLeak, __LINE__, code, "" );
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code = "struct abc\n"
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"{\n"
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" int a;\n"
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" int b;\n"
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" int c;\n"
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"}\n"
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"\n"
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"static void f()\n"
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"{\n"
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" struct abc *abc1 = new abc;\n"
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" p = &abc1->a;\n" // p may be part of a garbage collector
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"}\n";
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check_( CheckMemoryLeak, __LINE__, code, "" );
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////////////////////////////////////////////////
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// arrays
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////////////////////////////////////////////////
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/* TODO
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code = "static void f()\n"
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"{\n"
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" char *str[10];\n"
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" str[0] = strdup(\"hello\");\n"
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"}\n";
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check_( CheckMemoryLeak, __LINE__, code, "[test.cpp:3]: Memory leak: str[0]\n" );
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*/
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////////////////////////////////////////////////
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// struct members
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////////////////////////////////////////////////
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code = "static char *f()\n"
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"{\n"
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" Fred *fred = new Fred;\n"
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" free( fred->Name );\n"
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"}\n";
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check( CheckMemoryLeak, __LINE__, code, "[test.cpp:5]: Memory leak: fred\n" );
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/* TODO
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code = "struct Fred\n"
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"{\n"
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" char *str;\n"
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"}\n"
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"\n"
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"void f()\n"
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"{\n"
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" Fred f;\n"
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" f.str = strdup(\"aa\");\n"
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"}\n";
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check_( CheckMemoryLeak, __LINE__, code, "[test.cpp:9]: Memory leak: f.str\n" );
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*/
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code = "static struct fib6_table *fib6_alloc_table(struct net *net, u32 id)\n"
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"{\n"
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" struct fib6_table *table;\n"
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"\n"
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" table = kzalloc(sizeof(*table), GFP_ATOMIC);\n"
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" if (table != NULL) {\n"
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" table->tb6_id = id;\n"
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" table->tb6_root.leaf = net->ipv6.ip6_null_entry;\n"
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" table->tb6_root.fn_flags = RTN_ROOT | RTN_TL_ROOT | RTN_RTINFO;\n"
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" }\n"
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"\n"
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" return table;\n"
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"}\n";
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ShowAll = false;
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check( CheckMemoryLeak, __LINE__, code, "" );
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ShowAll = true;
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////////////////////////////////////////////////
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// function calls
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////////////////////////////////////////////////
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code = "static char *dmalloc()\n"
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"{\n"
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" char *p = new char[100];\n"
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" return p;\n"
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"}\n"
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"static void f()\n"
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"{\n"
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" char *p = dmalloc();\n"
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"}\n";
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check( CheckMemoryLeak, __LINE__, code, "[test.cpp:9]: Memory leak: p\n" );
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code = "static char *dmalloc()\n"
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"{\n"
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" char *p = new char[100];\n"
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" return p;\n"
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"}\n"
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"static void f()\n"
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"{\n"
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" char *p = dmalloc();\n"
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" delete p;\n"
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"}\n";
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check( CheckMemoryLeak, __LINE__, code, "[test.cpp:9]: Mismatching allocation and deallocation: p\n" );
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code = "static void foo(const char *str)\n"
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"{ }\n"
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"\n"
|
|
"static void f()\n"
|
|
"{\n"
|
|
" char *p = new char[100];\n"
|
|
" foo(p);\n"
|
|
"}\n";
|
|
check( CheckMemoryLeak, __LINE__, code, "[test.cpp:8]: Memory leak: p\n" );
|
|
|
|
|
|
code = "static void f()\n"
|
|
"{\n"
|
|
" char *p = new char[100];\n"
|
|
" foo(p);\n"
|
|
"}\n";
|
|
check_( CheckMemoryLeak, __LINE__, code, "" );
|
|
|
|
|
|
code = "static void f()\n"
|
|
"{\n"
|
|
" char *p = new char[100];\n"
|
|
" foo.add(p);\n"
|
|
"}\n";
|
|
check_( CheckMemoryLeak, __LINE__, code, "" );
|
|
|
|
}
|
|
//---------------------------------------------------------------------------
|
|
|
|
static void memleak_in_class()
|
|
{
|
|
|
|
|
|
const char *code;
|
|
|
|
code = "class Fred\n"
|
|
"{\n"
|
|
"private:\n"
|
|
" char *str1;\n"
|
|
" char *str2;\n"
|
|
"public:\n"
|
|
" Fred();\n"
|
|
" ~Fred();\n"
|
|
"};\n"
|
|
"\n"
|
|
"Fred::Fred()\n"
|
|
"{\n"
|
|
" str1 = new char[10];\n"
|
|
" str2 = new char[10];\n"
|
|
"}\n"
|
|
"\n"
|
|
"Fred::~Fred()\n"
|
|
"{\n"
|
|
" delete [] str2;\n"
|
|
"}\n";
|
|
|
|
check( CheckMemoryLeak, __LINE__, code, "[test.cpp:1]: Memory leak: Fred::str1\n" );
|
|
|
|
|
|
|
|
|
|
code = "class Fred\n"
|
|
"{\n"
|
|
"private:\n"
|
|
" char *str1;\n"
|
|
"public:\n"
|
|
" Fred();\n"
|
|
" ~Fred();\n"
|
|
"};\n"
|
|
"\n"
|
|
"Fred::Fred()\n"
|
|
"{\n"
|
|
" str1 = new char[10];\n"
|
|
"}\n"
|
|
"\n"
|
|
"Fred::~Fred()\n"
|
|
"{\n"
|
|
" free(str1);\n"
|
|
"}\n";
|
|
|
|
check( CheckMemoryLeak, __LINE__, code, "[test.cpp:17]: Mismatching allocation and deallocation: Fred::str1\n" );
|
|
|
|
|
|
|
|
|
|
/* TODO
|
|
code = "class Fred\n"
|
|
"{\n"
|
|
"private:\n"
|
|
" char *str;\n"
|
|
"public:\n"
|
|
" Fred();\n"
|
|
" ~Fred();\n"
|
|
" void SetStr(const char s[]);"
|
|
"};\n"
|
|
"\n"
|
|
"Fred::Fred()\n"
|
|
"{\n"
|
|
" str = NULL;\n"
|
|
"}\n"
|
|
"\n"
|
|
"Fred::~Fred()\n"
|
|
"{\n"
|
|
" free(str1);\n"
|
|
"}\n"
|
|
"\n"
|
|
"void Fred::SetStr(const char s[])\n"
|
|
"{\n"
|
|
" str = strdup(s);\n"
|
|
"}\n";
|
|
|
|
check( CheckMemoryLeak, __LINE__, code, "Memory leak for 'Fred::str'\n" );
|
|
*/
|
|
|
|
|
|
}
|
|
//---------------------------------------------------------------------------
|
|
|
|
static void division()
|
|
{
|
|
|
|
const char *code;
|
|
|
|
code = "void f()\n"
|
|
"{\n"
|
|
" int ivar = -2;\n"
|
|
" unsigned int uvar = 2;\n"
|
|
" return ivar / uvar;\n"
|
|
"}\n";
|
|
check( CheckUnsignedDivision, __LINE__, code, "[test.cpp:5]: If the result is negative it will be wrong because an operand is unsigned.\n" );
|
|
|
|
|
|
code = "void f()\n"
|
|
"{\n"
|
|
" int ivar = -2;\n"
|
|
" unsigned int uvar = 2;\n"
|
|
" return uvar / ivar;\n"
|
|
"}\n";
|
|
check( CheckUnsignedDivision, __LINE__, code, "[test.cpp:5]: If the result is negative it will be wrong because an operand is unsigned.\n" );
|
|
|
|
}
|
|
//---------------------------------------------------------------------------
|
|
|
|
static void variable_scope()
|
|
{
|
|
|
|
const char *code;
|
|
|
|
/* TODO
|
|
// Unused private member variable...
|
|
code = "class Fred\n"
|
|
"{\n"
|
|
"private:\n"
|
|
" int i;\n"
|
|
"public:\n"
|
|
" Fred();\n"
|
|
"};\n"
|
|
"Fred::Fred()\n"
|
|
"{\n"
|
|
" i = 0;\n"
|
|
"}\n";
|
|
*/
|
|
|
|
// Scope of variable..
|
|
code = "void f()\n"
|
|
"{\n"
|
|
" int i;\n"
|
|
" if (abc)\n"
|
|
" {\n"
|
|
" i = 1;\n"
|
|
" }\n"
|
|
"}\n";
|
|
check( CheckVariableScope, __LINE__, code, "[test.cpp:3] The scope of the variable 'i' can be limited\n" );
|
|
|
|
|
|
code = "static void DeleteNextToken(TOKEN *tok)\n"
|
|
"{\n"
|
|
" TOKEN *next = tok->next;\n"
|
|
" tok->next = next->next;\n"
|
|
" free(next->str);\n"
|
|
" delete next;\n"
|
|
"}\n";
|
|
check( CheckVariableScope, __LINE__, code, "" );
|
|
|
|
|
|
|
|
code = "static void f()\n"
|
|
"{\n"
|
|
" bool special = false;\n"
|
|
" do\n"
|
|
" {\n"
|
|
" // Special sequence\n"
|
|
" if (special)\n"
|
|
" special = false;\n"
|
|
" else\n"
|
|
" special = (c == \'\\\');\n"
|
|
" }\n"
|
|
" while (special || c != \'\"\');\n"
|
|
"}\n";
|
|
check( CheckVariableScope, __LINE__, code, "" );
|
|
|
|
|
|
|
|
code = "static void f()\n"
|
|
"{\n"
|
|
" int i = 0;\n"
|
|
" {\n"
|
|
" i+5;\n"
|
|
" }\n"
|
|
" {\n"
|
|
" i+5;\n"
|
|
" }\n"
|
|
"}\n";
|
|
check( CheckVariableScope, __LINE__, code, "" );
|
|
|
|
|
|
|
|
code = "static void f()\n"
|
|
"{\n"
|
|
"#define F1(x, y, z) (z ^ (x & (y ^ z)))\n"
|
|
"}\n";
|
|
check( CheckVariableScope, __LINE__, code, "" );
|
|
|
|
|
|
code = "struct a\n"
|
|
"{\n"
|
|
" int x;\n"
|
|
" int y;\n"
|
|
"};\n";
|
|
check( CheckVariableScope, __LINE__, code, "" );
|
|
|
|
|
|
code = "static void f()\n"
|
|
"{\n"
|
|
" struct\n"
|
|
" {\n"
|
|
" int x;\n"
|
|
" int y;\n"
|
|
" } fred;\n"
|
|
"}\n";
|
|
check( CheckVariableScope, __LINE__, code, "" );
|
|
|
|
|
|
code = "static void f()\n"
|
|
"{\n"
|
|
" int i;\n"
|
|
" while (abc)\n"
|
|
" {\n"
|
|
" if (cond1)\n"
|
|
" {\n"
|
|
" i = 2;\n"
|
|
" }\n"
|
|
" if (cond2)\n"
|
|
" {\n"
|
|
" f(i);\n"
|
|
" }\n"
|
|
" }\n"
|
|
"}\n";
|
|
check( CheckVariableScope, __LINE__, code, "" );
|
|
|
|
|
|
|
|
|
|
code = "static void f()\n"
|
|
"{\n"
|
|
" TPoint p1;\n"
|
|
" for (i=0;i<10;i++)\n"
|
|
" {\n"
|
|
" p1=point(i,i);\n"
|
|
" }\n"
|
|
"}\n";
|
|
check( CheckVariableScope, __LINE__, code, "" );
|
|
}
|
|
//---------------------------------------------------------------------------
|
|
|
|
static void fpar_byvalue()
|
|
{
|
|
check( CheckConstantFunctionParameter,
|
|
__LINE__,
|
|
"void f(const std::string str);",
|
|
"[test.cpp:1] str is passed by value, it could be passed by reference/pointer instead\n" );
|
|
|
|
/* TODO
|
|
check( CheckConstantFunctionParameter,
|
|
__LINE__,
|
|
"void f(const int a, const std::vector<int> v, const int b);",
|
|
"[test.cpp:1] v is passed by value, it could be passed by reference/pointer instead\n" );
|
|
*/
|
|
|
|
check( CheckConstantFunctionParameter,
|
|
__LINE__,
|
|
"class Fred;\n"
|
|
"void f(const Fred f);",
|
|
"[test.cpp:2] f is passed by value, it could be passed by reference/pointer instead\n" );
|
|
}
|
|
//---------------------------------------------------------------------------
|
|
|
|
static void unused_struct_member()
|
|
{
|
|
check( CheckStructMemberUsage,
|
|
__LINE__,
|
|
"struct abc {int i;};",
|
|
"[test.cpp:1]: struct member 'abc::i' is never read\n" );
|
|
|
|
check( CheckStructMemberUsage,
|
|
__LINE__,
|
|
"struct abc {unsigned int i;};",
|
|
"[test.cpp:1]: struct member 'abc::i' is never read\n" );
|
|
|
|
check( CheckStructMemberUsage,
|
|
__LINE__,
|
|
"struct abc {int *i;};",
|
|
"[test.cpp:1]: struct member 'abc::i' is never read\n" );
|
|
|
|
check( CheckStructMemberUsage,
|
|
__LINE__,
|
|
"struct abc {unsigned int *i;};",
|
|
"[test.cpp:1]: struct member 'abc::i' is never read\n" );
|
|
|
|
check( CheckStructMemberUsage,
|
|
__LINE__,
|
|
"struct abc {int i[10];};",
|
|
"[test.cpp:1]: struct member 'abc::i' is never read\n" );
|
|
|
|
check( CheckStructMemberUsage,
|
|
__LINE__,
|
|
"struct abc {unsigned int i[10];};",
|
|
"[test.cpp:1]: struct member 'abc::i' is never read\n" );
|
|
|
|
|
|
check( CheckStructMemberUsage,
|
|
__LINE__,
|
|
"struct abc {int *i[10];};",
|
|
"[test.cpp:1]: struct member 'abc::i' is never read\n" );
|
|
|
|
check( CheckStructMemberUsage,
|
|
__LINE__,
|
|
"struct abc {unsigned int *i[10];};",
|
|
"[test.cpp:1]: struct member 'abc::i' is never read\n" );
|
|
|
|
|
|
}
|
|
//---------------------------------------------------------------------------
|
|
|
|
|
|
|