linux - clang 静态分析器的一些检查器在 linux 下不工作

Question

首先我输入命令:

clang -cc1 -analyzer-checker-help 

如下列出所有可用的检查器。

alpha.core.BoolAssignment       Warn about assigning non-{0,1} values to Boolean variables
  alpha.core.CastSize             Check when casting a malloc'ed type T, whether the size is a multiple of the size of T
  alpha.core.CastToStruct         Check for cast from non-struct pointer to struct pointer
  alpha.core.FixedAddr            Check for assignment of a fixed address to a pointer
  alpha.core.PointerArithm        Check for pointer arithmetic on locations other than array elements
  alpha.core.PointerSub           Check for pointer subtractions on two pointers pointing to different memory chunks
  alpha.core.SizeofPtr            Warn about unintended use of sizeof() on pointer expressions
  alpha.cplusplus.VirtualCall     Check virtual function calls during construction or destruction
......................................

然后我选择两个(BoolAssignment和VirtualCall)进行测试，代码如下:

int f1(){
int a=5;
short b=4;
bool a1=a;//maybe warn
bool b1=b;//maybe warn
if(a1&&b1)return 1;
return 0;
}
class M{
public:
    virtual int GetAge(){return 0;}
};
class P:public M{
public:
    virtual int GetAge(){return 1;}
    P(){GetAge();}//maybe warn
    ~P(){GetAge();}//maybe warn
};

但是什么也没有发生，怎么了？这是我调用支票的命令

scan-build --use-analyzer=/usr/bin/clang clang++ test.cpp -c -o test.o

Answer 1

alpha.core.BoolAssignment 不是默认检查。您必须使用 -enable-checker 选项启用它。所以命令是:

scan-build --use-analyzer=/usr/bin/clang -enable-checker alpha.core.BoolAssignment clang++ test.cpp -c -o test.o