static void
aarch64_linux_prepare_to_resume (struct lwp_info *lwp)
{
struct thread_info *thread = get_lwp_thread (lwp);
ptid_t ptid = ptid_of (thread);
struct arch_lwp_info *info = lwp->arch_private;
if (DR_HAS_CHANGED (info->dr_changed_bp)
|| DR_HAS_CHANGED (info->dr_changed_wp))
{
int tid = ptid_get_lwp (ptid);
struct process_info *proc = find_process_pid (ptid_get_pid (ptid));
struct aarch64_debug_reg_state *state
= &proc->priv->arch_private->debug_reg_state;
if (show_debug_regs)
fprintf (stderr, "prepare_to_resume thread %ld\n", lwpid_of (thread));
/* Watchpoints. */
if (DR_HAS_CHANGED (info->dr_changed_wp))
{
aarch64_linux_set_debug_regs (state, tid, 1);
DR_CLEAR_CHANGED (info->dr_changed_wp);
}
/* Breakpoints. */
if (DR_HAS_CHANGED (info->dr_changed_bp))
{
aarch64_linux_set_debug_regs (state, tid, 0);
DR_CLEAR_CHANGED (info->dr_changed_bp);
}
}
}
void
remove_thread (struct thread_info *thread)
{
if (thread->btrace != NULL)
target_disable_btrace (thread->btrace);
discard_queued_stop_replies (ptid_of (thread));
remove_inferior (&all_threads, (struct inferior_list_entry *) thread);
free_one_thread (&thread->entry);
}
void
remove_thread (struct thread_info *thread)
{
if (thread->btrace != NULL)
target_disable_btrace (thread->btrace);
discard_queued_stop_replies (ptid_of (thread));
all_threads.remove (thread);
free_one_thread (thread);
if (current_thread == thread)
current_thread = NULL;
}
static void
arm_new_fork (struct process_info *parent, struct process_info *child)
{
struct arch_process_info *parent_proc_info;
struct arch_process_info *child_proc_info;
struct lwp_info *child_lwp;
struct arch_lwp_info *child_lwp_info;
int i;
/* These are allocated by linux_add_process. */
gdb_assert (parent->priv != NULL
&& parent->priv->arch_private != NULL);
gdb_assert (child->priv != NULL
&& child->priv->arch_private != NULL);
parent_proc_info = parent->priv->arch_private;
child_proc_info = child->priv->arch_private;
/* Linux kernel before 2.6.33 commit
72f674d203cd230426437cdcf7dd6f681dad8b0d
will inherit hardware debug registers from parent
on fork/vfork/clone. Newer Linux kernels create such tasks with
zeroed debug registers.
GDB core assumes the child inherits the watchpoints/hw
breakpoints of the parent, and will remove them all from the
forked off process. Copy the debug registers mirrors into the
new process so that all breakpoints and watchpoints can be
removed together. The debug registers mirror will become zeroed
in the end before detaching the forked off process, thus making
this compatible with older Linux kernels too. */
*child_proc_info = *parent_proc_info;
/* Mark all the hardware breakpoints and watchpoints as changed to
make sure that the registers will be updated. */
child_lwp = find_lwp_pid (ptid_of (child));
child_lwp_info = child_lwp->arch_private;
for (i = 0; i < MAX_BPTS; i++)
child_lwp_info->bpts_changed[i] = 1;
for (i = 0; i < MAX_WPTS; i++)
child_lwp_info->wpts_changed[i] = 1;
}
int
prepare_to_access_memory (void)
{
struct thread_search search;
struct thread_info *thread;
memset (&search, 0, sizeof (search));
search.current_gen_ptid = general_thread;
prev_general_thread = general_thread;
if (the_target->prepare_to_access_memory != NULL)
{
int res;
res = the_target->prepare_to_access_memory ();
if (res != 0)
return res;
}
find_inferior (&all_threads, thread_search_callback, &search);
/* Prefer a stopped thread. If none is found, try the current
thread. Otherwise, take the first thread in the process. If
none is found, undo the effects of
target->prepare_to_access_memory() and return error. */
if (search.stopped != NULL)
thread = search.stopped;
else if (search.current != NULL)
thread = search.current;
else if (search.first != NULL)
thread = search.first;
else
{
done_accessing_memory ();
return 1;
}
current_thread = thread;
general_thread = ptid_of (thread);
return 0;
}
static int
thread_search_callback (struct inferior_list_entry *entry, void *args)
{
struct thread_info *thread = (struct thread_info *) entry;
struct thread_search *s = (struct thread_search *) args;
if (ptid_get_pid (entry->id) == ptid_get_pid (s->current_gen_ptid)
&& mythread_alive (ptid_of (thread)))
{
if (s->stopped == NULL
&& the_target->thread_stopped != NULL
&& thread_stopped (thread))
s->stopped = thread;
if (s->first == NULL)
s->first = thread;
if (s->current == NULL && ptid_equal (s->current_gen_ptid, entry->id))
s->current = thread;
}
return 0;
}
