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- /* Common things used by the various darwin files
- Copyright (C) 1995-2022 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 *, 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);
- };
- /* 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;
- #define MACH_CHECK_ERROR(ret) \
- mach_check_error (ret, __FILE__, __LINE__, __func__)
- 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 */
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