堆vs数据段vs堆栈分配

我正在看下面的程序,不确定内存是如何分配的以及为什么:

void function() {
    char text1[] = "SomeText";
    char* text2 = "Some Text";
    char *text = (char*) malloc(strlen("Some Text") + 1 );
}

在上面的代码中,最后一个显然是在堆中。 但是,据我了解,text2在程序的数据段中,而text1可能在堆栈中。 或者我的假设是错误的? 这里有什么正确的假设? 这个编译器是否依赖?

谢谢


// Array allocated on the stack and initialized with "SomeText" string.
// It has automatic storage duration. You shouldn't care about freeing memory.
char text1[] = "SomeText"; 

// Pointer to the constant string "Some Text".
// It has static storage duration. You shouldn't care about freeing memory.
// Note that it should be "a pointer to const".
// In this case you'll be protected from accidential changing of 
// the constant data (changing constant object leads to UB).
const char* text2 = "Some Text";

// malloc will allocate memory on the heap. 
// It has dynamic storage duration. 
// You should call "free" in the end to avoid memory leak.
char *text = (char*) malloc(strlen("Some Text") + 1 );

是的,在大多数系统中,你是对的:

text1将成为堆栈上的可写变量数组(它必须是可写数组)

text2实际上必须是const char* ,并且是的,它会指向可执行文件的文本段(但可能会跨可执行格式更改)

text将在堆上

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