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Sun Studio 12 Update 1：使用 dbx 调试程序

查找类型和类的定义

whatis 命令的 -t 选项可显示类型的定义。对于 C++，whatis -t 显示的列表包括模板定义和类模板实例化。

要打印类型或 C++ 类的声明，请键入：


(dbx) whatis -t type_or_class_name

要查看继承成员，可以在 whatis 命令中使用 -r 选项（表示“递归”），该选项显示指定类的声明以及它从基类继承的成员。


(dbx) whatis -t -r  class_name

whatis -r 查询的输出可能会很长，具体取决于类分层结构以及类的大小。输出以从最原始的类继承的成员列表开头。插入的注释行将成员列表分到其各自的父类中。

以下是两个示例，它们使用了类 table，它是父类 load_bearing_block 的子类，而该父类又是 block 的子类。

如果不使用 -r，whatis 会报告在类 table 中声明的成员：


(dbx) whatis -t class table
class table : public load_bearing_block {
public:
    table::table(char *name, int w, int h, const class point &pos);
    virtual char *table::type();
    virtual void table::draw(unsigned long pw);
};

以下是对子类使用 whatis -r 以查看它继承的成员时的结果：


(dbx) whatis -t -r class table
class table : public load_bearing_block {
public:
  /* from base class table::load_bearing_block::block */
  block::block();
  block::block(char *name, int w, int h, const class point &pos, class load_bearing_block *blk);
    virtual char *block::type();
    char *block::name();
    int block::is_movable();
//  deleted several members from example protected:
    char *nm;
    int movable;
    int width;
    int height;
    class point  position;
    class load_bearing_block *supported_by;
    Panel_item panel_item;
    /* from base class table::load_bearing_block */
public:
    load_bearing_block::load_bearing_block();
    load_bearing_block::load_bearing_block(char *name, int w, int h,
        const class point &pos, class load_bearing_block *blk);
    virtual int load_bearing_block::is_load_bearing();
    virtual class list *load_bearing_block::supported_blocks();
    void load_bearing_block::add_supported_block(class block &b);
    void load_bearing_block::remove_supported_block(class block &b);
    virtual void load_bearing_block::print_supported_blocks();
    virtual void load_bearing_block::clear_top();
    virtual void load_bearing_block::put_on(class block &object);
    class point load_bearing_block::get_space(class block &object);
    class point load_bearing_block::find_space(class block &object);
    class point load_bearing_block::make_space(class block &object);
protected:
    class list *support_for;
    /* from class table */
public:
    table::table(char *name, int w, int h, const class point &pos);
    virtual char *table::type();
    virtual void table::draw(unsigned long pw);
};