/* Common things used by the various darwin files Copyright (C) 1995-2020 Free Software Foundation, Inc. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. */ #ifndef DARWIN_NAT_H #define DARWIN_NAT_H #include "inf-child.h" #include <mach/mach.h> #include "gdbthread.h" 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 *, int) 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, long 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); }; /* Describe the mach exception handling state for a task. This state is saved before being changed and restored when a process is detached. For more information on these fields see task_get_exception_ports manual page. */ struct darwin_exception_info { /* Exceptions handled by the port. */ exception_mask_t masks[EXC_TYPES_COUNT] {}; /* Ports receiving exception messages. */ mach_port_t ports[EXC_TYPES_COUNT] {}; /* Type of messages sent. */ exception_behavior_t behaviors[EXC_TYPES_COUNT] {}; /* Type of state to be sent. */ thread_state_flavor_t flavors[EXC_TYPES_COUNT] {}; /* Number of elements set. */ mach_msg_type_number_t count = 0; }; static inline darwin_thread_info * get_darwin_thread_info (class thread_info *thread) { return static_cast<darwin_thread_info *> (thread->priv.get ()); } /* Describe an inferior. */ struct darwin_inferior : public private_inferior { /* Corresponding task port. */ task_t task = 0; /* Port which will receive the dead-name notification for the task port. This is used to detect the death of the task. */ mach_port_t notify_port = 0; /* Initial exception handling. */ darwin_exception_info exception_info; /* Number of messages that have been received but not yet replied. */ unsigned int pending_messages = 0; /* Set if inferior is not controlled by ptrace(2) but through Mach. */ bool no_ptrace = false; /* True if this task is suspended. */ bool suspended = false; /* Sorted vector of known threads. */ std::vector<darwin_thread_t *> threads; }; /* Return the darwin_inferior attached to INF. */ static inline darwin_inferior * get_darwin_inferior (inferior *inf) { return static_cast<darwin_inferior *> (inf->priv.get ()); } /* Exception port. */ extern mach_port_t darwin_ex_port; /* Port set. */ extern mach_port_t darwin_port_set; /* A copy of mach_host_self (). */ extern mach_port_t darwin_host_self; /* FUNCTION_NAME is defined in common-utils.h (or not). */ #ifdef FUNCTION_NAME #define MACH_CHECK_ERROR(ret) \ mach_check_error (ret, __FILE__, __LINE__, FUNCTION_NAME) #else #define MACH_CHECK_ERROR(ret) \ mach_check_error (ret, __FILE__, __LINE__, "??") #endif extern void mach_check_error (kern_return_t ret, const char *file, unsigned int line, const char *func); void darwin_set_sstep (thread_t thread, int enable); void darwin_check_osabi (darwin_inferior *inf, thread_t thread); #endif /* DARWIN_NAT_H */