//// Dis VM// File: vm_tools.h// Author: arr// #ifndef _DISVM_SRC_INCLUDE_VM_TOOLS_H_#define _DISVM_SRC_INCLUDE_VM_TOOLS_H_ #include <cstdint>#include <vector>#include <memory>#include <functional>#include "runtime.h" namespace disvm{    namespace runtime    {        using cookie_t = std::size_t;         // Value in event context        union vm_context_value_t        {            cookie_t cookie;            std::shared_ptr<vm_module_t> *module; // Note this is a pointer to std::shared_ptr<>            vm_registers_t *registers;            const vm_thread_t *thread;            const vm_string_t *str;            const vm_alloc_t *alloc;        };         // Event context        struct vm_event_context_t        {            vm_context_value_t value1;            vm_context_value_t value2;            vm_context_value_t value3;        };         // List of possible events        enum class vm_event_t        {            module_vm_load,      // value1: std::shared_ptr<vm_module_t>                                 // value2: const vm_string_t - path on disk             module_thread_load,  // value1: vm_registers_t                                 // value2: std::shared_ptr<vm_module_t>             thread_begin,        // value1: const vm_thread_t            thread_end,          // value1: const vm_thread_t             exception_raised,    // value1: vm_registers_t                                 // value2: const vm_string_t - exception ID                                 // value3: vm_alloc_t - object raised             exception_unhandled, // value1: vm_registers_t                                 // value2: const vm_string_t - exception ID                                 // value3: const vm_alloc_t - object raised             breakpoint,          // value1: vm_registers_t                                 // value2: cookie_t - cookie of breakpoint. '0' indicates the breakpoint was inserted by the VM or compiler.        };         using vm_event_callback_t = std::function<void(vm_event_t, vm_event_context_t &)>;         struct breakpoint_details_t final        {            std::shared_ptr<vm_module_t> module;            vm_pc_t pc;        };         // VM tool controller        class vm_tool_controller_t        {        public:            // The current vm instance            virtual vm_t& get_vm_instance() const = 0;             // Call the supplied callback when the specified event occurs            virtual cookie_t subscribe_event(vm_event_t, vm_event_callback_t) = 0;            virtual void unsubscribe_event(cookie_t) = 0;             // Set a breakpoint in the supplied module at the specified PC location            virtual cookie_t set_breakpoint(std::shared_ptr<vm_module_t>, vm_pc_t) = 0;            virtual breakpoint_details_t get_breakpoint_details(cookie_t) const = 0;            virtual void clear_breakpoint(cookie_t) = 0;        };    }} #endif // _DISVM_SRC_INCLUDE_VM_TOOLS_H_