+struct darwin_exception_msg
+{
+ mach_msg_header_t header;
+
+ /* Thread and task taking the exception. */
+ mach_port_t thread_port;
+ mach_port_t task_port;
+
+ /* Type of the exception. */
+ exception_type_t ex_type;
+
+ /* Machine dependent details. */
+ mach_msg_type_number_t data_count;
+ integer_t ex_data[2];
+};
+
+enum darwin_msg_state
+{
+ /* The thread is running. */
+ DARWIN_RUNNING,
+
+ /* The thread is stopped. */
+ DARWIN_STOPPED,
+
+ /* The thread has sent a message and waits for a reply. */
+ DARWIN_MESSAGE
+};
+
+struct darwin_thread_info : public private_thread_info
+{
+ /* The thread port from a GDB point of view. */
+ thread_t gdb_port = 0;
+
+ /* The thread port from the inferior point of view. Not to be used inside
+ gdb except for get_ada_task_ptid. */
+ thread_t inf_port = 0;
+
+ /* Current message state.
+ If the kernel has sent a message it expects a reply and the inferior
+ can't be killed before. */
+ enum darwin_msg_state msg_state = DARWIN_RUNNING;
+
+ /* True if this thread is single-stepped. */
+ bool single_step = false;
+
+ /* True if a signal was manually sent to the thread. */
+ bool signaled = false;
+
+ /* The last exception received. */
+ struct darwin_exception_msg event {};
+};
+typedef struct darwin_thread_info darwin_thread_t;
+
+/* This needs to be overridden by the platform specific nat code. */
+
+class darwin_nat_target : public inf_child_target
+{
+ void create_inferior (const char *exec_file,
+ const std::string &allargs,
+ char **env, int from_tty) override;
+
+ void attach (const char *, int) override;
+
+ void detach (inferior *, int) override;
+
+ ptid_t wait (ptid_t, struct target_waitstatus *, target_wait_flags) override;
+
+ void mourn_inferior () override;
+
+ void kill () override;
+
+ void interrupt () override;
+
+ void resume (ptid_t, int , enum gdb_signal) override;
+
+ bool thread_alive (ptid_t ptid) override;
+
+ std::string pid_to_str (ptid_t) override;
+
+ char *pid_to_exec_file (int pid) override;
+
+ enum target_xfer_status xfer_partial (enum target_object object,
+ const char *annex,
+ gdb_byte *readbuf,
+ const gdb_byte *writebuf,
+ ULONGEST offset, ULONGEST len,
+ ULONGEST *xfered_len) override;
+
+ bool supports_multi_process () override;
+
+ ptid_t get_ada_task_ptid (long lwp, ULONGEST thread) override;
+
+private:
+ ptid_t wait_1 (ptid_t, struct target_waitstatus *);
+ void check_new_threads (inferior *inf);
+ int decode_exception_message (mach_msg_header_t *hdr,
+ inferior **pinf,
+ darwin_thread_t **pthread);
+ ptid_t decode_message (mach_msg_header_t *hdr,
+ darwin_thread_t **pthread,
+ inferior **pinf,
+ target_waitstatus *status);
+ void stop_inferior (inferior *inf);
+ void init_thread_list (inferior *inf);
+ void ptrace_him (int pid);
+ int cancel_breakpoint (ptid_t ptid);
+};