* linux-low.c (linux_resume): Take a struct thread_resume *
argument. (linux_wait): Update call. (resume_ptr): New static variable. (linux_continue_one_thread): Renamed from linux_continue_one_process. Use resume_ptr. (linux_resume): Use linux_continue_one_thread. * server.c (handle_v_cont, handle_v_requests): New functions. (myresume): New function. (main): Handle 'v' case. * target.h (struct thread_resume): New type. (struct target_ops): Change argument of "resume" to struct thread_resume *. (myresume): Delete macro.
This commit is contained in:
Daniel Jacobowitz
parent
86d30acc85
commit
64386c31df
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@ -1,3 +1,20 @@
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2003-10-13 Daniel Jacobowitz <drow@mvista.com>
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* linux-low.c (linux_resume): Take a struct thread_resume *
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argument.
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(linux_wait): Update call.
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(resume_ptr): New static variable.
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(linux_continue_one_thread): Renamed from
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linux_continue_one_process. Use resume_ptr.
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(linux_resume): Use linux_continue_one_thread.
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* server.c (handle_v_cont, handle_v_requests): New functions.
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(myresume): New function.
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(main): Handle 'v' case.
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* target.h (struct thread_resume): New type.
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(struct target_ops): Change argument of "resume" to struct
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thread_resume *.
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(myresume): Delete macro.
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2003-08-08 H.J. Lu <hongjiu.lu@intel.com>
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* Makefile.in (install-only): Create dest dir. Support DESTDIR.
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@ -52,7 +52,7 @@ int using_threads;
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static void linux_resume_one_process (struct inferior_list_entry *entry,
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int step, int signal);
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static void linux_resume (int step, int signal);
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static void linux_resume (struct thread_resume *resume_info);
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static void stop_all_processes (void);
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static int linux_wait_for_event (struct thread_info *child);
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@ -652,7 +652,12 @@ retry:
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/* No stepping, no signal - unless one is pending already, of course. */
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if (child == NULL)
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linux_resume (0, 0);
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{
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struct thread_resume resume_info;
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resume_info.thread = -1;
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resume_info.step = resume_info.sig = resume_info.leave_stopped = 0;
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linux_resume (&resume_info);
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}
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}
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enable_async_io ();
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@ -868,33 +873,48 @@ linux_resume_one_process (struct inferior_list_entry *entry,
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perror_with_name ("ptrace");
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}
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/* This function is called once per process other than the first
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one. The first process we are told the signal to continue
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with, and whether to step or continue; for all others, any
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existing signals will be marked in status_pending_p to be
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reported momentarily, and we preserve the stepping flag. */
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static struct thread_resume *resume_ptr;
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/* This function is called once per thread. We look up the thread
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in RESUME_PTR, which will tell us whether to resume, step, or leave
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the thread stopped; and what signal, if any, it should be sent.
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For threads which we aren't explicitly told otherwise, we preserve
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the stepping flag; this is used for stepping over gdbserver-placed
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breakpoints. If the thread has a status pending, it may not actually
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be resumed. */
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static void
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linux_continue_one_process (struct inferior_list_entry *entry)
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linux_continue_one_thread (struct inferior_list_entry *entry)
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{
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struct process_info *process;
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struct thread_info *thread;
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int ndx, step;
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process = (struct process_info *) entry;
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linux_resume_one_process (entry, process->stepping, 0);
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thread = (struct thread_info *) entry;
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process = get_thread_process (thread);
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ndx = 0;
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while (resume_ptr[ndx].thread != -1 && resume_ptr[ndx].thread != entry->id)
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ndx++;
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if (resume_ptr[ndx].leave_stopped)
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return;
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if (resume_ptr[ndx].thread == -1)
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step = process->stepping || resume_ptr[ndx].step;
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else
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step = resume_ptr[ndx].step;
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linux_resume_one_process (&process->head, step, resume_ptr[ndx].sig);
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}
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static void
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linux_resume (int step, int signal)
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linux_resume (struct thread_resume *resume_info)
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{
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struct process_info *process;
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/* Yes, this is quadratic. If it ever becomes a problem then it's
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fairly easy to fix. Yes, the use of a global here is rather ugly. */
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process = get_thread_process (current_inferior);
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/* If the current process has a status pending, this signal will
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be enqueued and sent later. */
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linux_resume_one_process (&process->head, step, signal);
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if (cont_thread == 0 || cont_thread == -1)
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for_each_inferior (&all_processes, linux_continue_one_process);
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resume_ptr = resume_info;
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for_each_inferior (&all_threads, linux_continue_one_thread);
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}
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#ifdef HAVE_LINUX_USRREGS
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@ -125,6 +125,155 @@ handle_query (char *own_buf)
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own_buf[0] = 0;
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}
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/* Parse vCont packets. */
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void
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handle_v_cont (char *own_buf, char *status, unsigned char *signal)
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{
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char *p, *q;
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int n = 0, i = 0;
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struct thread_resume *resume_info, default_action;
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/* Count the number of semicolons in the packet. There should be one
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for every action. */
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p = &own_buf[5];
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while (p)
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{
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n++;
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p++;
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p = strchr (p, ';');
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}
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/* Allocate room for one extra action, for the default remain-stopped
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behavior; if no default action is in the list, we'll need the extra
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slot. */
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resume_info = malloc ((n + 1) * sizeof (resume_info[0]));
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default_action.thread = -1;
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default_action.leave_stopped = 1;
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default_action.step = 0;
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default_action.sig = 0;
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p = &own_buf[5];
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i = 0;
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while (*p)
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{
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p++;
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resume_info[i].leave_stopped = 0;
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if (p[0] == 's' || p[0] == 'S')
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resume_info[i].step = 1;
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else if (p[0] == 'c' || p[0] == 'C')
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resume_info[i].step = 0;
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else
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goto err;
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if (p[0] == 'S' || p[0] == 'C')
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{
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int sig;
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sig = strtol (p + 1, &q, 16);
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if (p == q)
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goto err;
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p = q;
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if (!target_signal_to_host_p (sig))
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goto err;
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resume_info[i].sig = target_signal_to_host (sig);
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}
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else
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{
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resume_info[i].sig = 0;
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p = p + 1;
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}
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if (p[0] == 0)
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{
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resume_info[i].thread = -1;
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default_action = resume_info[i];
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/* Note: we don't increment i here, we'll overwrite this entry
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the next time through. */
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}
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else if (p[0] == ':')
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{
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resume_info[i].thread = strtol (p + 1, &q, 16);
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if (p == q)
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goto err;
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p = q;
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if (p[0] != ';' && p[0] != 0)
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goto err;
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i++;
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}
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}
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resume_info[i] = default_action;
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/* Still used in occasional places in the backend. */
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if (n == 1 && resume_info[0].thread != -1)
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cont_thread = resume_info[0].thread;
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else
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cont_thread = -1;
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(*the_target->resume) (resume_info);
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free (resume_info);
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*signal = mywait (status, 1);
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prepare_resume_reply (own_buf, *status, *signal);
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return;
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err:
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/* No other way to report an error... */
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strcpy (own_buf, "");
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free (resume_info);
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return;
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}
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/* Handle all of the extended 'v' packets. */
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void
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handle_v_requests (char *own_buf, char *status, unsigned char *signal)
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{
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if (strncmp (own_buf, "vCont;", 6) == 0)
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{
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handle_v_cont (own_buf, status, signal);
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return;
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}
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if (strncmp (own_buf, "vCont?", 6) == 0)
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{
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strcpy (own_buf, "vCont;c;C;s;S");
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return;
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}
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/* Otherwise we didn't know what packet it was. Say we didn't
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understand it. */
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own_buf[0] = 0;
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return;
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}
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void
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myresume (int step, int sig)
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{
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struct thread_resume resume_info[2];
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int n = 0;
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if (step || sig || cont_thread > 0)
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{
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resume_info[0].thread
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= ((struct inferior_list_entry *) current_inferior)->id;
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resume_info[0].step = step;
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resume_info[0].sig = sig;
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resume_info[0].leave_stopped = 0;
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n++;
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}
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resume_info[n].thread = -1;
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resume_info[n].step = 0;
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resume_info[n].sig = 0;
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resume_info[n].leave_stopped = (cont_thread > 0);
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(*the_target->resume) (resume_info);
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}
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static int attached;
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static void
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@ -383,6 +532,10 @@ main (int argc, char *argv[])
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own_buf[0] = '\0';
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break;
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}
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case 'v':
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/* Extended (long) request. */
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handle_v_requests (own_buf, &status, &signal);
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break;
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default:
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/* It is a request we don't understand. Respond with an
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empty packet so that gdb knows that we don't support this
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@ -24,6 +24,25 @@
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#ifndef TARGET_H
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#define TARGET_H
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/* This structure describes how to resume a particular thread (or
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all threads) based on the client's request. If thread is -1, then
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this entry applies to all threads. These are generally passed around
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as an array, and terminated by a thread == -1 entry. */
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struct thread_resume
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{
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int thread;
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/* If non-zero, leave this thread stopped. */
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int leave_stopped;
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/* If non-zero, we want to single-step. */
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int step;
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/* If non-zero, send this signal when we resume. */
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int sig;
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};
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struct target_ops
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{
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/* Start a new process.
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@ -56,14 +75,9 @@ struct target_ops
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int (*thread_alive) (int pid);
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/* Resume the inferior process.
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/* Resume the inferior process. */
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If STEP is non-zero, we want to single-step.
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If SIGNAL is nonzero, send the process that signal as we resume it.
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*/
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void (*resume) (int step, int signo);
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void (*resume) (struct thread_resume *resume_info);
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/* Wait for the inferior process to change state.
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@ -132,9 +146,6 @@ void set_target_ops (struct target_ops *);
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#define mythread_alive(pid) \
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(*the_target->thread_alive) (pid)
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#define myresume(step,signo) \
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(*the_target->resume) (step, signo)
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#define fetch_inferior_registers(regno) \
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(*the_target->fetch_registers) (regno)
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