/* Remote target communications for serial-line targets in custom GDB protocol
- Copyright (C) 1988-2016 Free Software Foundation, Inc.
+ Copyright (C) 1988-2017 Free Software Foundation, Inc.
This file is part of GDB.
#define MAXTHREADLISTRESULTS 32
+/* The max number of chars in debug output. The rest of chars are
+ omitted. */
+
+#define REMOTE_DEBUG_MAX_CHAR 512
+
/* Data for the vFile:pread readahead cache. */
struct readahead_cache
/* This is set to the data address of the access causing the target
to stop for a watchpoint. */
CORE_ADDR watch_data_address;
+
+ /* Fields used by the vCont action coalescing implemented in
+ remote_resume / remote_commit_resume. remote_resume stores each
+ thread's last resume request in these fields, so that a later
+ remote_commit_resume knows which is the proper action for this
+ thread to include in the vCont packet. */
+
+ /* True if the last target_resume call for this thread was a step
+ request, false if a continue request. */
+ int last_resume_step;
+
+ /* The signal specified in the last target_resume call for this
+ thread. */
+ enum gdb_signal last_resume_sig;
+
+ /* Whether this thread was already vCont-resumed on the remote
+ side. */
+ int vcont_resumed;
};
static void
/* If no main executable is currently open then attempt to
open the file that was executed to create this inferior. */
if (try_open_exec && get_exec_file (0) == NULL)
- exec_file_locate_attach (pid, 1);
+ exec_file_locate_attach (pid, 0, 1);
return inf;
}
+static struct private_thread_info *
+ get_private_info_thread (struct thread_info *info);
+
/* Add thread PTID to GDB's thread list. Tag it as executing/running
according to RUNNING. */
remote_add_thread (ptid_t ptid, int running, int executing)
{
struct remote_state *rs = get_remote_state ();
+ struct thread_info *thread;
/* GDB historically didn't pull threads in the initial connection
setup. If the remote target doesn't even have a concept of
might be confusing to the user. Be silent then, preserving the
age old behavior. */
if (rs->starting_up)
- add_thread_silent (ptid);
+ thread = add_thread_silent (ptid);
else
- add_thread (ptid);
+ thread = add_thread (ptid);
+ get_private_info_thread (thread)->vcont_resumed = executing;
set_executing (ptid, executing);
set_running (ptid, running);
}
}
}
-/* Return the private thread data, creating it if necessary. */
+/* Return THREAD's private thread data, creating it if necessary. */
static struct private_thread_info *
-demand_private_info (ptid_t ptid)
+get_private_info_thread (struct thread_info *thread)
{
- struct thread_info *info = find_thread_ptid (ptid);
-
- gdb_assert (info);
+ gdb_assert (thread != NULL);
- if (!info->priv)
+ if (thread->priv == NULL)
{
- info->priv = XNEW (struct private_thread_info);
- info->private_dtor = free_private_thread_info;
- info->priv->core = -1;
- info->priv->extra = NULL;
- info->priv->name = NULL;
+ struct private_thread_info *priv = XNEW (struct private_thread_info);
+
+ thread->private_dtor = free_private_thread_info;
+ thread->priv = priv;
+
+ priv->core = -1;
+ priv->extra = NULL;
+ priv->name = NULL;
+ priv->name = NULL;
+ priv->last_resume_step = 0;
+ priv->last_resume_sig = GDB_SIGNAL_0;
+ priv->vcont_resumed = 0;
}
- return info->priv;
+ return thread->priv;
+}
+
+/* Return PTID's private thread data, creating it if necessary. */
+
+static struct private_thread_info *
+get_private_info_ptid (ptid_t ptid)
+{
+ struct thread_info *info = find_thread_ptid (ptid);
+
+ return get_private_info_thread (info);
}
/* Call this function as a result of
remote_notice_new_inferior (item->ptid, executing);
- info = demand_private_info (item->ptid);
+ info = get_private_info_ptid (item->ptid);
info->core = item->core;
info->extra = item->extra;
item->extra = NULL;
set_executing (event_ptid, 0);
set_running (event_ptid, 0);
+ thread->priv->vcont_resumed = 0;
}
/* "Notice" the new inferiors before anything related to
/* If doing detach-on-fork, we don't mourn, because that will delete
breakpoints that should be available for the followed inferior. */
if (!is_fork_parent)
- target_mourn_inferior ();
+ target_mourn_inferior (inferior_ptid);
else
{
inferior_ptid = null_ptid;
return p;
}
+/* Set the target running, using the packets that use Hc
+ (c/s/C/S). */
+
+static void
+remote_resume_with_hc (struct target_ops *ops,
+ ptid_t ptid, int step, enum gdb_signal siggnal)
+{
+ struct remote_state *rs = get_remote_state ();
+ struct thread_info *thread;
+ char *buf;
+
+ rs->last_sent_signal = siggnal;
+ rs->last_sent_step = step;
+
+ /* The c/s/C/S resume packets use Hc, so set the continue
+ thread. */
+ if (ptid_equal (ptid, minus_one_ptid))
+ set_continue_thread (any_thread_ptid);
+ else
+ set_continue_thread (ptid);
+
+ ALL_NON_EXITED_THREADS (thread)
+ resume_clear_thread_private_info (thread);
+
+ buf = rs->buf;
+ if (execution_direction == EXEC_REVERSE)
+ {
+ /* We don't pass signals to the target in reverse exec mode. */
+ if (info_verbose && siggnal != GDB_SIGNAL_0)
+ warning (_(" - Can't pass signal %d to target in reverse: ignored."),
+ siggnal);
+
+ if (step && packet_support (PACKET_bs) == PACKET_DISABLE)
+ error (_("Remote reverse-step not supported."));
+ if (!step && packet_support (PACKET_bc) == PACKET_DISABLE)
+ error (_("Remote reverse-continue not supported."));
+
+ strcpy (buf, step ? "bs" : "bc");
+ }
+ else if (siggnal != GDB_SIGNAL_0)
+ {
+ buf[0] = step ? 'S' : 'C';
+ buf[1] = tohex (((int) siggnal >> 4) & 0xf);
+ buf[2] = tohex (((int) siggnal) & 0xf);
+ buf[3] = '\0';
+ }
+ else
+ strcpy (buf, step ? "s" : "c");
+
+ putpkt (buf);
+}
+
/* Resume the remote inferior by using a "vCont" packet. The thread
to be resumed is PTID; STEP and SIGGNAL indicate whether the
resumed thread should be single-stepped and/or signalled. If PTID
be stepped and/or signalled is given in the global INFERIOR_PTID.
This function returns non-zero iff it resumes the inferior.
- This function issues a strict subset of all possible vCont commands at the
- moment. */
+ This function issues a strict subset of all possible vCont commands
+ at the moment. */
static int
-remote_vcont_resume (ptid_t ptid, int step, enum gdb_signal siggnal)
+remote_resume_with_vcont (ptid_t ptid, int step, enum gdb_signal siggnal)
{
struct remote_state *rs = get_remote_state ();
char *p;
char *endp;
+ /* No reverse execution actions defined for vCont. */
+ if (execution_direction == EXEC_REVERSE)
+ return 0;
+
if (packet_support (PACKET_vCont) == PACKET_SUPPORT_UNKNOWN)
remote_vcont_probe (rs);
ptid_t ptid, int step, enum gdb_signal siggnal)
{
struct remote_state *rs = get_remote_state ();
- char *buf;
- struct thread_info *thread;
+
+ /* When connected in non-stop mode, the core resumes threads
+ individually. Resuming remote threads directly in target_resume
+ would thus result in sending one packet per thread. Instead, to
+ minimize roundtrip latency, here we just store the resume
+ request; the actual remote resumption will be done in
+ target_commit_resume / remote_commit_resume, where we'll be able
+ to do vCont action coalescing. */
+ if (target_is_non_stop_p () && execution_direction != EXEC_REVERSE)
+ {
+ struct private_thread_info *remote_thr;
+
+ if (ptid_equal (minus_one_ptid, ptid) || ptid_is_pid (ptid))
+ remote_thr = get_private_info_ptid (inferior_ptid);
+ else
+ remote_thr = get_private_info_ptid (ptid);
+ remote_thr->last_resume_step = step;
+ remote_thr->last_resume_sig = siggnal;
+ return;
+ }
/* In all-stop, we can't mark REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN
(explained in remote-notif.c:handle_notification) so
if (!target_is_non_stop_p ())
remote_notif_process (rs->notif_state, ¬if_client_stop);
- rs->last_sent_signal = siggnal;
- rs->last_sent_step = step;
-
rs->last_resume_exec_dir = execution_direction;
- /* The vCont packet doesn't need to specify threads via Hc. */
- /* No reverse support (yet) for vCont. */
- if (execution_direction != EXEC_REVERSE)
- if (remote_vcont_resume (ptid, step, siggnal))
- goto done;
-
- /* All other supported resume packets do use Hc, so set the continue
- thread. */
- if (ptid_equal (ptid, minus_one_ptid))
- set_continue_thread (any_thread_ptid);
- else
- set_continue_thread (ptid);
-
- ALL_NON_EXITED_THREADS (thread)
- resume_clear_thread_private_info (thread);
-
- buf = rs->buf;
- if (execution_direction == EXEC_REVERSE)
- {
- /* We don't pass signals to the target in reverse exec mode. */
- if (info_verbose && siggnal != GDB_SIGNAL_0)
- warning (_(" - Can't pass signal %d to target in reverse: ignored."),
- siggnal);
+ /* Prefer vCont, and fallback to s/c/S/C, which use Hc. */
+ if (!remote_resume_with_vcont (ptid, step, siggnal))
+ remote_resume_with_hc (ops, ptid, step, siggnal);
- if (step && packet_support (PACKET_bs) == PACKET_DISABLE)
- error (_("Remote reverse-step not supported."));
- if (!step && packet_support (PACKET_bc) == PACKET_DISABLE)
- error (_("Remote reverse-continue not supported."));
-
- strcpy (buf, step ? "bs" : "bc");
- }
- else if (siggnal != GDB_SIGNAL_0)
- {
- buf[0] = step ? 'S' : 'C';
- buf[1] = tohex (((int) siggnal >> 4) & 0xf);
- buf[2] = tohex (((int) siggnal) & 0xf);
- buf[3] = '\0';
- }
- else
- strcpy (buf, step ? "s" : "c");
-
- putpkt (buf);
-
- done:
/* We are about to start executing the inferior, let's register it
with the event loop. NOTE: this is the one place where all the
execution commands end up. We could alternatively do this in each
if (!target_is_non_stop_p ())
rs->waiting_for_stop_reply = 1;
}
+
+static void check_pending_events_prevent_wildcard_vcont
+ (int *may_global_wildcard_vcont);
+static int is_pending_fork_parent_thread (struct thread_info *thread);
+
+/* Private per-inferior info for target remote processes. */
+
+struct private_inferior
+{
+ /* Whether we can send a wildcard vCont for this process. */
+ int may_wildcard_vcont;
+};
+
+/* Structure used to track the construction of a vCont packet in the
+ outgoing packet buffer. This is used to send multiple vCont
+ packets if we have more actions than would fit a single packet. */
+
+struct vcont_builder
+{
+ /* Pointer to the first action. P points here if no action has been
+ appended yet. */
+ char *first_action;
+
+ /* Where the next action will be appended. */
+ char *p;
+
+ /* The end of the buffer. Must never write past this. */
+ char *endp;
+};
+
+/* Prepare the outgoing buffer for a new vCont packet. */
+
+static void
+vcont_builder_restart (struct vcont_builder *builder)
+{
+ struct remote_state *rs = get_remote_state ();
+
+ builder->p = rs->buf;
+ builder->endp = rs->buf + get_remote_packet_size ();
+ builder->p += xsnprintf (builder->p, builder->endp - builder->p, "vCont");
+ builder->first_action = builder->p;
+}
+
+/* If the vCont packet being built has any action, send it to the
+ remote end. */
+
+static void
+vcont_builder_flush (struct vcont_builder *builder)
+{
+ struct remote_state *rs;
+
+ if (builder->p == builder->first_action)
+ return;
+
+ rs = get_remote_state ();
+ putpkt (rs->buf);
+ getpkt (&rs->buf, &rs->buf_size, 0);
+ if (strcmp (rs->buf, "OK") != 0)
+ error (_("Unexpected vCont reply in non-stop mode: %s"), rs->buf);
+}
+
+/* The largest action is range-stepping, with its two addresses. This
+ is more than sufficient. If a new, bigger action is created, it'll
+ quickly trigger a failed assertion in append_resumption (and we'll
+ just bump this). */
+#define MAX_ACTION_SIZE 200
+
+/* Append a new vCont action in the outgoing packet being built. If
+ the action doesn't fit the packet along with previous actions, push
+ what we've got so far to the remote end and start over a new vCont
+ packet (with the new action). */
+
+static void
+vcont_builder_push_action (struct vcont_builder *builder,
+ ptid_t ptid, int step, enum gdb_signal siggnal)
+{
+ char buf[MAX_ACTION_SIZE + 1];
+ char *endp;
+ size_t rsize;
+
+ endp = append_resumption (buf, buf + sizeof (buf),
+ ptid, step, siggnal);
+
+ /* Check whether this new action would fit in the vCont packet along
+ with previous actions. If not, send what we've got so far and
+ start a new vCont packet. */
+ rsize = endp - buf;
+ if (rsize > builder->endp - builder->p)
+ {
+ vcont_builder_flush (builder);
+ vcont_builder_restart (builder);
+
+ /* Should now fit. */
+ gdb_assert (rsize <= builder->endp - builder->p);
+ }
+
+ memcpy (builder->p, buf, rsize);
+ builder->p += rsize;
+ *builder->p = '\0';
+}
+
+/* to_commit_resume implementation. */
+
+static void
+remote_commit_resume (struct target_ops *ops)
+{
+ struct remote_state *rs = get_remote_state ();
+ struct inferior *inf;
+ struct thread_info *tp;
+ int any_process_wildcard;
+ int may_global_wildcard_vcont;
+ struct vcont_builder vcont_builder;
+
+ /* If connected in all-stop mode, we'd send the remote resume
+ request directly from remote_resume. Likewise if
+ reverse-debugging, as there are no defined vCont actions for
+ reverse execution. */
+ if (!target_is_non_stop_p () || execution_direction == EXEC_REVERSE)
+ return;
+
+ /* Try to send wildcard actions ("vCont;c" or "vCont;c:pPID.-1")
+ instead of resuming all threads of each process individually.
+ However, if any thread of a process must remain halted, we can't
+ send wildcard resumes and must send one action per thread.
+
+ Care must be taken to not resume threads/processes the server
+ side already told us are stopped, but the core doesn't know about
+ yet, because the events are still in the vStopped notification
+ queue. For example:
+
+ #1 => vCont s:p1.1;c
+ #2 <= OK
+ #3 <= %Stopped T05 p1.1
+ #4 => vStopped
+ #5 <= T05 p1.2
+ #6 => vStopped
+ #7 <= OK
+ #8 (infrun handles the stop for p1.1 and continues stepping)
+ #9 => vCont s:p1.1;c
+
+ The last vCont above would resume thread p1.2 by mistake, because
+ the server has no idea that the event for p1.2 had not been
+ handled yet.
+
+ The server side must similarly ignore resume actions for the
+ thread that has a pending %Stopped notification (and any other
+ threads with events pending), until GDB acks the notification
+ with vStopped. Otherwise, e.g., the following case is
+ mishandled:
+
+ #1 => g (or any other packet)
+ #2 <= [registers]
+ #3 <= %Stopped T05 p1.2
+ #4 => vCont s:p1.1;c
+ #5 <= OK
+
+ Above, the server must not resume thread p1.2. GDB can't know
+ that p1.2 stopped until it acks the %Stopped notification, and
+ since from GDB's perspective all threads should be running, it
+ sends a "c" action.
+
+ Finally, special care must also be given to handling fork/vfork
+ events. A (v)fork event actually tells us that two processes
+ stopped -- the parent and the child. Until we follow the fork,
+ we must not resume the child. Therefore, if we have a pending
+ fork follow, we must not send a global wildcard resume action
+ (vCont;c). We can still send process-wide wildcards though. */
+
+ /* Start by assuming a global wildcard (vCont;c) is possible. */
+ may_global_wildcard_vcont = 1;
+
+ /* And assume every process is individually wildcard-able too. */
+ ALL_NON_EXITED_INFERIORS (inf)
+ {
+ if (inf->priv == NULL)
+ inf->priv = XNEW (struct private_inferior);
+ inf->priv->may_wildcard_vcont = 1;
+ }
+
+ /* Check for any pending events (not reported or processed yet) and
+ disable process and global wildcard resumes appropriately. */
+ check_pending_events_prevent_wildcard_vcont (&may_global_wildcard_vcont);
+
+ ALL_NON_EXITED_THREADS (tp)
+ {
+ /* If a thread of a process is not meant to be resumed, then we
+ can't wildcard that process. */
+ if (!tp->executing)
+ {
+ tp->inf->priv->may_wildcard_vcont = 0;
+
+ /* And if we can't wildcard a process, we can't wildcard
+ everything either. */
+ may_global_wildcard_vcont = 0;
+ continue;
+ }
+
+ /* If a thread is the parent of an unfollowed fork, then we
+ can't do a global wildcard, as that would resume the fork
+ child. */
+ if (is_pending_fork_parent_thread (tp))
+ may_global_wildcard_vcont = 0;
+ }
+
+ /* Now let's build the vCont packet(s). Actions must be appended
+ from narrower to wider scopes (thread -> process -> global). If
+ we end up with too many actions for a single packet vcont_builder
+ flushes the current vCont packet to the remote side and starts a
+ new one. */
+ vcont_builder_restart (&vcont_builder);
+
+ /* Threads first. */
+ ALL_NON_EXITED_THREADS (tp)
+ {
+ struct private_thread_info *remote_thr = tp->priv;
+
+ if (!tp->executing || remote_thr->vcont_resumed)
+ continue;
+
+ gdb_assert (!thread_is_in_step_over_chain (tp));
+
+ if (!remote_thr->last_resume_step
+ && remote_thr->last_resume_sig == GDB_SIGNAL_0
+ && tp->inf->priv->may_wildcard_vcont)
+ {
+ /* We'll send a wildcard resume instead. */
+ remote_thr->vcont_resumed = 1;
+ continue;
+ }
+
+ vcont_builder_push_action (&vcont_builder, tp->ptid,
+ remote_thr->last_resume_step,
+ remote_thr->last_resume_sig);
+ remote_thr->vcont_resumed = 1;
+ }
+
+ /* Now check whether we can send any process-wide wildcard. This is
+ to avoid sending a global wildcard in the case nothing is
+ supposed to be resumed. */
+ any_process_wildcard = 0;
+
+ ALL_NON_EXITED_INFERIORS (inf)
+ {
+ if (inf->priv->may_wildcard_vcont)
+ {
+ any_process_wildcard = 1;
+ break;
+ }
+ }
+
+ if (any_process_wildcard)
+ {
+ /* If all processes are wildcard-able, then send a single "c"
+ action, otherwise, send an "all (-1) threads of process"
+ continue action for each running process, if any. */
+ if (may_global_wildcard_vcont)
+ {
+ vcont_builder_push_action (&vcont_builder, minus_one_ptid,
+ 0, GDB_SIGNAL_0);
+ }
+ else
+ {
+ ALL_NON_EXITED_INFERIORS (inf)
+ {
+ if (inf->priv->may_wildcard_vcont)
+ {
+ vcont_builder_push_action (&vcont_builder,
+ pid_to_ptid (inf->pid),
+ 0, GDB_SIGNAL_0);
+ }
+ }
+ }
+ }
+
+ vcont_builder_flush (&vcont_builder);
+}
+
\f
/* Non-stop version of target_stop. Uses `vCont;t' to stop a remote
struct stop_reply *output;
};
-/* Determine if THREAD is a pending fork parent thread. ARG contains
+/* Determine if THREAD_PTID is a pending fork parent thread. ARG contains
the pid of the process that owns the threads we want to check, or
-1 if we want to check all threads. */
return 0;
}
+/* Return the thread's pending status used to determine whether the
+ thread is a fork parent stopped at a fork event. */
+
+static struct target_waitstatus *
+thread_pending_fork_status (struct thread_info *thread)
+{
+ if (thread->suspend.waitstatus_pending_p)
+ return &thread->suspend.waitstatus;
+ else
+ return &thread->pending_follow;
+}
+
+/* Determine if THREAD is a pending fork parent thread. */
+
+static int
+is_pending_fork_parent_thread (struct thread_info *thread)
+{
+ struct target_waitstatus *ws = thread_pending_fork_status (thread);
+ int pid = -1;
+
+ return is_pending_fork_parent (ws, pid, thread->ptid);
+}
+
/* Check whether EVENT is a fork event, and if it is, remove the
fork child from the context list passed in DATA. */
fork child threads from the CONTEXT list. */
ALL_NON_EXITED_THREADS (thread)
{
- struct target_waitstatus *ws;
-
- if (thread->suspend.waitstatus_pending_p)
- ws = &thread->suspend.waitstatus;
- else
- ws = &thread->pending_follow;
+ struct target_waitstatus *ws = thread_pending_fork_status (thread);
if (is_pending_fork_parent (ws, pid, thread->ptid))
{
remove_child_of_pending_fork, ¶m);
}
+/* Check whether EVENT would prevent a global or process wildcard
+ vCont action. */
+
+static int
+check_pending_event_prevents_wildcard_vcont_callback
+ (QUEUE (stop_reply_p) *q,
+ QUEUE_ITER (stop_reply_p) *iter,
+ stop_reply_p event,
+ void *data)
+{
+ struct inferior *inf;
+ int *may_global_wildcard_vcont = (int *) data;
+
+ if (event->ws.kind == TARGET_WAITKIND_NO_RESUMED
+ || event->ws.kind == TARGET_WAITKIND_NO_HISTORY)
+ return 1;
+
+ if (event->ws.kind == TARGET_WAITKIND_FORKED
+ || event->ws.kind == TARGET_WAITKIND_VFORKED)
+ *may_global_wildcard_vcont = 0;
+
+ inf = find_inferior_ptid (event->ptid);
+
+ /* This may be the first time we heard about this process.
+ Regardless, we must not do a global wildcard resume, otherwise
+ we'd resume this process too. */
+ *may_global_wildcard_vcont = 0;
+ if (inf != NULL)
+ inf->priv->may_wildcard_vcont = 0;
+
+ return 1;
+}
+
+/* Check whether any event pending in the vStopped queue would prevent
+ a global or process wildcard vCont action. Clear
+ *may_global_wildcard if we can't do a global wildcard (vCont;c),
+ and clear the event inferior's may_wildcard_vcont flag if we can't
+ do a process-wide wildcard resume (vCont;c:pPID.-1). */
+
+static void
+check_pending_events_prevent_wildcard_vcont (int *may_global_wildcard)
+{
+ struct notif_client *notif = ¬if_client_stop;
+
+ remote_notif_get_pending_events (notif);
+ QUEUE_iterate (stop_reply_p, stop_reply_queue,
+ check_pending_event_prevents_wildcard_vcont_callback,
+ may_global_wildcard);
+}
+
/* Remove stop replies in the queue if its pid is equal to the given
inferior's pid. */
}
remote_notice_new_inferior (ptid, 0);
- remote_thr = demand_private_info (ptid);
+ remote_thr = get_private_info_ptid (ptid);
remote_thr->core = stop_reply->core;
remote_thr->stop_reason = stop_reply->stop_reason;
remote_thr->watch_data_address = stop_reply->watch_data_address;
+ remote_thr->vcont_resumed = 0;
}
stop_reply_xfree (stop_reply);
the 'p' packet must be used. */
if (buf_len < 2 * rsa->sizeof_g_packet)
{
- rsa->sizeof_g_packet = buf_len / 2;
+ long sizeof_g_packet = buf_len / 2;
for (i = 0; i < gdbarch_num_regs (gdbarch); i++)
{
+ long offset = rsa->regs[i].offset;
+ long reg_size = register_size (gdbarch, i);
+
if (rsa->regs[i].pnum == -1)
continue;
- if (rsa->regs[i].offset >= rsa->sizeof_g_packet)
+ if (offset >= sizeof_g_packet)
rsa->regs[i].in_g_packet = 0;
+ else if (offset + reg_size > sizeof_g_packet)
+ error (_("Truncated register %d in remote 'g' packet"), i);
else
rsa->regs[i].in_g_packet = 1;
}
+
+ /* Looks valid enough, we can assume this is the correct length
+ for a 'g' packet. It's important not to adjust
+ rsa->sizeof_g_packet if we have truncated registers otherwise
+ this "if" won't be run the next time the method is called
+ with a packet of the same size and one of the internal errors
+ below will trigger instead. */
+ rsa->sizeof_g_packet = sizeof_g_packet;
}
regs = (char *) alloca (rsa->sizeof_g_packet);
for (i = 0; i < gdbarch_num_regs (gdbarch); i++)
{
struct packet_reg *r = &rsa->regs[i];
+ long reg_size = register_size (gdbarch, i);
if (r->in_g_packet)
{
- if (r->offset * 2 >= strlen (rs->buf))
+ if ((r->offset + reg_size) * 2 > strlen (rs->buf))
/* This shouldn't happen - we adjusted in_g_packet above. */
internal_error (__FILE__, __LINE__,
_("unexpected end of 'g' packet reply"));
error (_("Remote failure reply: %s"), *buf);
}
-/* Return a pointer to an xmalloc'ed string representing an escaped
- version of BUF, of len N. E.g. \n is converted to \\n, \t to \\t,
- etc. The caller is responsible for releasing the returned
- memory. */
+/* Return a string representing an escaped version of BUF, of len N.
+ E.g. \n is converted to \\n, \t to \\t, etc. */
-static char *
+static std::string
escape_buffer (const char *buf, int n)
{
struct cleanup *old_chain;
struct ui_file *stb;
- char *str;
stb = mem_fileopen ();
old_chain = make_cleanup_ui_file_delete (stb);
fputstrn_unfiltered (buf, n, '\\', stb);
- str = ui_file_xstrdup (stb, NULL);
+ std::string str = ui_file_as_string (stb);
do_cleanups (old_chain);
return str;
}
if (remote_debug)
{
- struct cleanup *old_chain;
- char *str;
-
*p = '\0';
- str = escape_buffer (buf2, p - buf2);
- old_chain = make_cleanup (xfree, str);
- fprintf_unfiltered (gdb_stdlog, "Sending packet: %s...", str);
+
+ int len = (int) (p - buf2);
+
+ std::string str
+ = escape_buffer (buf2, std::min (len, REMOTE_DEBUG_MAX_CHAR));
+
+ fprintf_unfiltered (gdb_stdlog, "Sending packet: %s", str.c_str ());
+
+ if (str.length () > REMOTE_DEBUG_MAX_CHAR)
+ {
+ fprintf_unfiltered (gdb_stdlog, "[%zu bytes omitted]",
+ str.length () - REMOTE_DEBUG_MAX_CHAR);
+ }
+
+ fprintf_unfiltered (gdb_stdlog, "...");
+
gdb_flush (gdb_stdlog);
- do_cleanups (old_chain);
}
remote_serial_write (buf2, p - buf2);
{
if (remote_debug)
{
- struct cleanup *old_chain;
- char *str;
+ std::string str = escape_buffer (rs->buf, val);
- str = escape_buffer (rs->buf, val);
- old_chain = make_cleanup (xfree, str);
fprintf_unfiltered (gdb_stdlog,
" Notification received: %s\n",
- str);
- do_cleanups (old_chain);
+ str.c_str ());
}
handle_notification (rs->notif_state, rs->buf);
/* We're in sync now, rewait for the ack. */
if (remote_debug)
{
- struct cleanup *old_chain;
- char *str;
+ std::string str = escape_buffer (buf, bc);
- str = escape_buffer (buf, bc);
- old_chain = make_cleanup (xfree, str);
fprintf_unfiltered (gdb_stdlog,
"Bad checksum, sentsum=0x%x, "
"csum=0x%x, buf=%s\n",
- pktcsum, csum, str);
- do_cleanups (old_chain);
+ pktcsum, csum, str.c_str ());
}
/* Number of characters in buffer ignoring trailing
NULL. */
{
if (remote_debug)
{
- struct cleanup *old_chain;
- char *str;
+ std::string str
+ = escape_buffer (*buf,
+ std::min (val, REMOTE_DEBUG_MAX_CHAR));
- str = escape_buffer (*buf, val);
- old_chain = make_cleanup (xfree, str);
- fprintf_unfiltered (gdb_stdlog, "Packet received: %s\n", str);
- do_cleanups (old_chain);
+ fprintf_unfiltered (gdb_stdlog, "Packet received: %s",
+ str.c_str ());
+
+ if (str.length () > REMOTE_DEBUG_MAX_CHAR)
+ {
+ fprintf_unfiltered (gdb_stdlog, "[%zu bytes omitted]",
+ str.length () - REMOTE_DEBUG_MAX_CHAR);
+ }
+
+ fprintf_unfiltered (gdb_stdlog, "\n");
}
/* Skip the ack char if we're in no-ack mode. */
if (remote_debug)
{
- struct cleanup *old_chain;
- char *str;
+ std::string str = escape_buffer (*buf, val);
- str = escape_buffer (*buf, val);
- old_chain = make_cleanup (xfree, str);
fprintf_unfiltered (gdb_stdlog,
" Notification received: %s\n",
- str);
- do_cleanups (old_chain);
+ str.c_str ());
}
if (is_notif != NULL)
*is_notif = 1;
res = remote_vkill (pid, rs);
if (res == 0)
{
- target_mourn_inferior ();
+ target_mourn_inferior (inferior_ptid);
return;
}
}
not in extended mode, mourning the inferior also unpushes
remote_ops from the target stack, which closes the remote
connection. */
- target_mourn_inferior ();
+ target_mourn_inferior (inferior_ptid);
return;
}
struct bp_target_info *bp_tgt, char *buf,
char *buf_end)
{
- struct agent_expr *aexpr = NULL;
- int i, ix;
-
- if (VEC_empty (agent_expr_p, bp_tgt->conditions))
+ if (bp_tgt->conditions.empty ())
return 0;
buf += strlen (buf);
buf++;
/* Send conditions to the target and free the vector. */
- for (ix = 0;
- VEC_iterate (agent_expr_p, bp_tgt->conditions, ix, aexpr);
- ix++)
+ for (int ix = 0; ix < bp_tgt->conditions.size (); ix++)
{
+ struct agent_expr *aexpr = bp_tgt->conditions[ix];
+
xsnprintf (buf, buf_end - buf, "X%x,", aexpr->len);
buf += strlen (buf);
- for (i = 0; i < aexpr->len; ++i)
+ for (int i = 0; i < aexpr->len; ++i)
buf = pack_hex_byte (buf, aexpr->buf[i]);
*buf = '\0';
}
remote_add_target_side_commands (struct gdbarch *gdbarch,
struct bp_target_info *bp_tgt, char *buf)
{
- struct agent_expr *aexpr = NULL;
- int i, ix;
-
- if (VEC_empty (agent_expr_p, bp_tgt->tcommands))
+ if (bp_tgt->tcommands.empty ())
return;
buf += strlen (buf);
/* Concatenate all the agent expressions that are commands into the
cmds parameter. */
- for (ix = 0;
- VEC_iterate (agent_expr_p, bp_tgt->tcommands, ix, aexpr);
- ix++)
+ for (int ix = 0; ix < bp_tgt->tcommands.size (); ix++)
{
+ struct agent_expr *aexpr = bp_tgt->tcommands[ix];
+
sprintf (buf, "X%x,", aexpr->len);
buf += strlen (buf);
- for (i = 0; i < aexpr->len; ++i)
+ for (int i = 0; i < aexpr->len; ++i)
buf = pack_hex_byte (buf, aexpr->buf[i]);
*buf = '\0';
}
if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
set_general_process ();
- gdbarch_remote_breakpoint_from_pc (gdbarch, &addr, &bpsize);
-
rs = get_remote_state ();
p = rs->buf;
endbuf = rs->buf + get_remote_packet_size ();
*(p++) = ',';
addr = (ULONGEST) remote_address_masked (addr);
p += hexnumstr (p, addr);
- xsnprintf (p, endbuf - p, ",%d", bpsize);
+ xsnprintf (p, endbuf - p, ",%d", bp_tgt->kind);
if (remote_supports_cond_breakpoints (ops))
remote_add_target_side_condition (gdbarch, bp_tgt, p, endbuf);
case PACKET_ERROR:
return -1;
case PACKET_OK:
- bp_tgt->placed_address = addr;
- bp_tgt->placed_size = bpsize;
return 0;
case PACKET_UNKNOWN:
break;
/* If this breakpoint has target-side commands but this stub doesn't
support Z0 packets, throw error. */
- if (!VEC_empty (agent_expr_p, bp_tgt->tcommands))
+ if (!bp_tgt->tcommands.empty ())
throw_error (NOT_SUPPORTED_ERROR, _("\
Target doesn't support breakpoints that have target side commands."));
addr = (ULONGEST) remote_address_masked (bp_tgt->placed_address);
p += hexnumstr (p, addr);
- xsnprintf (p, endbuf - p, ",%d", bp_tgt->placed_size);
+ xsnprintf (p, endbuf - p, ",%d", bp_tgt->kind);
putpkt (rs->buf);
getpkt (&rs->buf, &rs->buf_size, 0);
struct remote_state *rs;
char *p, *endbuf;
char *message;
- int bpsize;
-
- /* The length field should be set to the size of a breakpoint
- instruction, even though we aren't inserting one ourselves. */
-
- gdbarch_remote_breakpoint_from_pc (gdbarch, &addr, &bpsize);
if (packet_support (PACKET_Z1) == PACKET_DISABLE)
return -1;
addr = remote_address_masked (addr);
p += hexnumstr (p, (ULONGEST) addr);
- xsnprintf (p, endbuf - p, ",%x", bpsize);
+ xsnprintf (p, endbuf - p, ",%x", bp_tgt->kind);
if (remote_supports_cond_breakpoints (self))
remote_add_target_side_condition (gdbarch, bp_tgt, p, endbuf);
case PACKET_UNKNOWN:
return -1;
case PACKET_OK:
- bp_tgt->placed_address = addr;
- bp_tgt->placed_size = bpsize;
return 0;
}
internal_error (__FILE__, __LINE__,
addr = remote_address_masked (bp_tgt->placed_address);
p += hexnumstr (p, (ULONGEST) addr);
- xsnprintf (p, endbuf - p, ",%x", bp_tgt->placed_size);
+ xsnprintf (p, endbuf - p, ",%x", bp_tgt->kind);
putpkt (rs->buf);
getpkt (&rs->buf, &rs->buf_size, 0);
may not, since we don't know how much of it will need to be escaped;
the target is free to respond with slightly less data. We subtract
five to account for the response type and the protocol frame. */
- n = std::min (get_remote_packet_size () - 5, len);
+ n = std::min<LONGEST> (get_remote_packet_size () - 5, len);
snprintf (rs->buf, get_remote_packet_size () - 4, "qXfer:%s:read:%s:%s,%s",
object_name, annex ? annex : "",
phex_nz (offset, sizeof offset),
char **stepping_actions;
int ndx;
struct cleanup *old_chain = NULL;
- struct agent_expr *aexpr;
- struct cleanup *aexpr_chain = NULL;
char *pkt;
struct breakpoint *b = loc->owner;
struct tracepoint *t = (struct tracepoint *) b;
capabilities at definition time. */
if (remote_supports_cond_tracepoints ())
{
- aexpr = gen_eval_for_expr (tpaddr, loc->cond);
- aexpr_chain = make_cleanup_free_agent_expr (aexpr);
+ agent_expr_up aexpr = gen_eval_for_expr (tpaddr, loc->cond.get ());
xsnprintf (buf + strlen (buf), BUF_SIZE - strlen (buf), ":X%x,",
aexpr->len);
pkt = buf + strlen (buf);
for (ndx = 0; ndx < aexpr->len; ++ndx)
pkt = pack_hex_byte (pkt, aexpr->buf[ndx]);
*pkt = '\0';
- do_cleanups (aexpr_chain);
}
else
warning (_("Target does not support conditional tracepoints, "
remote_ops.to_detach = remote_detach;
remote_ops.to_disconnect = remote_disconnect;
remote_ops.to_resume = remote_resume;
+ remote_ops.to_commit_resume = remote_commit_resume;
remote_ops.to_wait = remote_wait;
remote_ops.to_fetch_registers = remote_fetch_registers;
remote_ops.to_store_registers = remote_store_registers;
{
struct remote_state *rs = get_remote_state ();
+ /* We don't go async if the user has explicitly prevented it with the
+ "maint set target-async" command. */
if (!target_async_permitted)
- /* We only enable async when the user specifically asks for it. */
return 0;
/* We're async whenever the serial device is. */
struct cleanup *option_chain
= make_cleanup_ui_out_tuple_begin_end (uiout, "option");
- ui_out_field_string (uiout, "name", list->name);
- ui_out_text (uiout, ": ");
+ uiout->field_string ("name", list->name);
+ uiout->text (": ");
if (list->type == show_cmd)
do_show_command (NULL, from_tty, list);
else
projects / deliverable / binutils-gdb.git / blobdiff