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/* Common things used by the various *gnu-nat.c files
Copyright (C) 1995-2020 Free Software Foundation, Inc.
Written by Miles Bader <miles@gnu.ai.mit.edu>
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 GNU_NAT_H
#define GNU_NAT_H
#include "defs.h"
/* Work around conflict between Mach's 'thread_info' function, and GDB's
'thread_info' class. Make the former available as 'mach_thread_info'. */
#define thread_info mach_thread_info
/* Mach headers are not yet ready for C++ compilation. */
extern "C"
{
#include <mach.h>
}
#undef thread_info
/* Divert 'mach_thread_info' to the original Mach 'thread_info' function. */
extern __typeof__ (mach_thread_info) mach_thread_info asm ("thread_info");
#include <unistd.h>
#include "inf-child.h"
struct inf;
extern struct inf *gnu_current_inf;
/* Converts a GDB pid to a struct proc. */
struct proc *inf_tid_to_thread (struct inf *inf, int tid);
typedef void (inf_threads_ftype) (struct proc *thread, void *arg);
/* Call F for every thread in inferior INF, passing ARG as second parameter. */
void inf_threads (struct inf *inf, inf_threads_ftype *f, void *arg);
/* Makes sure that INF's thread list is synced with the actual process. */
int inf_update_procs (struct inf *inf);
/* A proc is either a thread, or the task (there can only be one task proc
because it always has the same TID, PROC_TID_TASK). */
struct proc
{
thread_t port; /* The task or thread port. */
int tid; /* The GDB pid (actually a thread id). */
int num; /* An id number for threads, to print. */
mach_port_t saved_exc_port; /* The task/thread's real exception port. */
mach_port_t exc_port; /* Our replacement, which for. */
int sc; /* Desired suspend count. */
int cur_sc; /* Implemented suspend count. */
int run_sc; /* Default sc when the program is running. */
int pause_sc; /* Default sc when gdb has control. */
int resume_sc; /* Sc resulting from the last resume. */
int detach_sc; /* SC to leave around when detaching
from program. */
thread_state_data_t state; /* Registers, &c. */
int state_valid:1; /* True if STATE is up to date. */
int state_changed:1;
int aborted:1; /* True if thread_abort has been called. */
int dead:1; /* We happen to know it's actually dead. */
/* Bit mask of registers fetched by gdb. This is used when we re-fetch
STATE after aborting the thread, to detect that gdb may have out-of-date
information. */
unsigned long fetched_regs;
struct inf *inf; /* Where we come from. */
struct proc *next;
};
/* The task has a thread entry with this TID. */
#define PROC_TID_TASK (-1)
#define proc_is_task(proc) ((proc)->tid == PROC_TID_TASK)
#define proc_is_thread(proc) ((proc)->tid != PROC_TID_TASK)
extern int __proc_pid (struct proc *proc);
/* Return printable description of proc. */
extern char *proc_string (struct proc *proc);
#define proc_debug(_proc, msg, args...) \
do { struct proc *__proc = (_proc); \
debug ("{proc %d/%d %s}: " msg, \
__proc_pid (__proc), __proc->tid, \
host_address_to_string (__proc) , ##args); } while (0)
extern bool gnu_debug_flag;
#define debug(msg, args...) \
do { if (gnu_debug_flag) \
fprintf_unfiltered (gdb_stdlog, "%s:%d: " msg "\r\n", \
__FILE__ , __LINE__ , ##args); } while (0)
/* A prototype generic GNU/Hurd target. The client can override it
with local methods. */
struct gnu_nat_target : public inf_child_target
{
void attach (const char *, int) override;
bool attach_no_wait () override
{ return true; }
void detach (inferior *, int) override;
void resume (ptid_t, int, enum gdb_signal) override;
ptid_t wait (ptid_t, struct target_waitstatus *, target_wait_flags) 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;
int find_memory_regions (find_memory_region_ftype func, void *data)
override;
void kill () override;
void create_inferior (const char *, const std::string &,
char **, int) override;
void mourn_inferior () override;
bool thread_alive (ptid_t ptid) override;
std::string pid_to_str (ptid_t) override;
void stop (ptid_t) override;
void inf_validate_procs (struct inf *inf);
void inf_suspend (struct inf *inf);
void inf_set_traced (struct inf *inf, int on);
void steal_exc_port (struct proc *proc, mach_port_t name);
/* Make sure that the state field in PROC is up to date, and return a
pointer to it, or 0 if something is wrong. If WILL_MODIFY is true,
makes sure that the thread is stopped and aborted first, and sets
the state_changed field in PROC to true. */
thread_state_t proc_get_state (struct proc *proc, int will_modify);
private:
void inf_clear_wait (struct inf *inf);
void inf_cleanup (struct inf *inf);
void inf_startup (struct inf *inf, int pid);
int inf_update_suspends (struct inf *inf);
void inf_set_pid (struct inf *inf, pid_t pid);
void inf_steal_exc_ports (struct inf *inf);
void inf_validate_procinfo (struct inf *inf);
void inf_validate_task_sc (struct inf *inf);
void inf_restore_exc_ports (struct inf *inf);
void inf_set_threads_resume_sc (struct inf *inf,
struct proc *run_thread,
int run_others);
int inf_set_threads_resume_sc_for_signal_thread (struct inf *inf);
void inf_resume (struct inf *inf);
void inf_set_step_thread (struct inf *inf, struct proc *proc);
void inf_detach (struct inf *inf);
void inf_attach (struct inf *inf, int pid);
void inf_signal (struct inf *inf, enum gdb_signal sig);
void inf_continue (struct inf *inf);
struct proc *make_proc (struct inf *inf, mach_port_t port, int tid);
void proc_abort (struct proc *proc, int force);
struct proc *_proc_free (struct proc *proc);
int proc_update_sc (struct proc *proc);
kern_return_t proc_get_exception_port (struct proc *proc, mach_port_t * port);
kern_return_t proc_set_exception_port (struct proc *proc, mach_port_t port);
mach_port_t _proc_get_exc_port (struct proc *proc);
void proc_steal_exc_port (struct proc *proc, mach_port_t exc_port);
void proc_restore_exc_port (struct proc *proc);
int proc_trace (struct proc *proc, int set);
};
/* The final/concrete instance. */
extern gnu_nat_target *gnu_target;
#endif /* GNU_NAT_H */
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