/* Main code for remote server for GDB.
Copyright (C) 1989, 1993, 1994, 1995, 1997, 1998, 1999, 2000, 2002, 2003,
- 2004, 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
+ 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
+ Free Software Foundation, Inc.
This file is part of GDB.
#if HAVE_SYS_WAIT_H
#include <sys/wait.h>
#endif
-#if HAVE_MALLOC_H
-#include <malloc.h>
-#endif
-unsigned long cont_thread;
-unsigned long general_thread;
-unsigned long step_thread;
+ptid_t cont_thread;
+ptid_t general_thread;
+ptid_t step_thread;
int server_waiting;
static int extended_protocol;
-static int attached;
static int response_needed;
static int exit_requested;
+int multi_process;
+int non_stop;
+
static char **program_argv, **wrapper_argv;
/* Enable miscellaneous debugging output. The name is historical - it
was originally used to debug LinuxThreads support. */
int debug_threads;
+/* Enable debugging of h/w breakpoint/watchpoint support. */
+int debug_hw_points;
+
int pass_signals[TARGET_SIGNAL_LAST];
jmp_buf toplevel;
/* Last status reported to GDB. */
static struct target_waitstatus last_status;
-static unsigned long last_ptid;
+static ptid_t last_ptid;
+
+static char *own_buf;
+static unsigned char *mem_buf;
+
+/* Structure holding information relative to a single stop reply. We
+ keep a queue of these (really a singly-linked list) to push to GDB
+ in non-stop mode. */
+struct vstop_notif
+{
+ /* Pointer to next in list. */
+ struct vstop_notif *next;
+
+ /* Thread or process that got the event. */
+ ptid_t ptid;
+
+ /* Event info. */
+ struct target_waitstatus status;
+};
+
+/* The pending stop replies list head. */
+static struct vstop_notif *notif_queue = NULL;
+
+/* Put a stop reply to the stop reply queue. */
+
+static void
+queue_stop_reply (ptid_t ptid, struct target_waitstatus *status)
+{
+ struct vstop_notif *new_notif;
+
+ new_notif = malloc (sizeof (*new_notif));
+ new_notif->next = NULL;
+ new_notif->ptid = ptid;
+ new_notif->status = *status;
+
+ if (notif_queue)
+ {
+ struct vstop_notif *tail;
+ for (tail = notif_queue;
+ tail && tail->next;
+ tail = tail->next)
+ ;
+ tail->next = new_notif;
+ }
+ else
+ notif_queue = new_notif;
+
+ if (remote_debug)
+ {
+ int i = 0;
+ struct vstop_notif *n;
+
+ for (n = notif_queue; n; n = n->next)
+ i++;
+
+ fprintf (stderr, "pending stop replies: %d\n", i);
+ }
+}
+
+/* Place an event in the stop reply queue, and push a notification if
+ we aren't sending one yet. */
+
+void
+push_event (ptid_t ptid, struct target_waitstatus *status)
+{
+ gdb_assert (status->kind != TARGET_WAITKIND_IGNORE);
+
+ queue_stop_reply (ptid, status);
+
+ /* If this is the first stop reply in the queue, then inform GDB
+ about it, by sending a Stop notification. */
+ if (notif_queue->next == NULL)
+ {
+ char *p = own_buf;
+ strcpy (p, "Stop:");
+ p += strlen (p);
+ prepare_resume_reply (p,
+ notif_queue->ptid, ¬if_queue->status);
+ putpkt_notif (own_buf);
+ }
+}
+
+/* Get rid of the currently pending stop replies for PID. If PID is
+ -1, then apply to all processes. */
+
+static void
+discard_queued_stop_replies (int pid)
+{
+ struct vstop_notif *prev = NULL, *reply, *next;
+
+ for (reply = notif_queue; reply; reply = next)
+ {
+ next = reply->next;
+
+ if (pid == -1
+ || ptid_get_pid (reply->ptid) == pid)
+ {
+ if (reply == notif_queue)
+ notif_queue = next;
+ else
+ prev->next = reply->next;
+
+ free (reply);
+ }
+ else
+ prev = reply;
+ }
+}
+
+/* If there are more stop replies to push, push one now. */
+
+static void
+send_next_stop_reply (char *own_buf)
+{
+ if (notif_queue)
+ prepare_resume_reply (own_buf,
+ notif_queue->ptid,
+ ¬if_queue->status);
+ else
+ write_ok (own_buf);
+}
static int
target_running (void)
start_inferior (char **argv)
{
char **new_argv = argv;
- attached = 0;
if (wrapper_argv != NULL)
{
new_argv[count] = NULL;
}
+ if (debug_threads)
+ {
+ int i;
+ for (i = 0; new_argv[i]; ++i)
+ fprintf (stderr, "new_argv[%d] = \"%s\"\n", i, new_argv[i]);
+ fflush (stderr);
+ }
+
#ifdef SIGTTOU
signal (SIGTTOU, SIG_DFL);
signal (SIGTTIN, SIG_DFL);
if (wrapper_argv != NULL)
{
struct thread_resume resume_info;
- unsigned long ptid;
- resume_info.thread = -1;
- resume_info.step = 0;
+ resume_info.thread = pid_to_ptid (signal_pid);
+ resume_info.kind = resume_continue;
resume_info.sig = 0;
- ptid = mywait (&last_status, 0);
+ mywait (pid_to_ptid (signal_pid), &last_status, 0, 0);
+
if (last_status.kind != TARGET_WAITKIND_STOPPED)
return signal_pid;
{
(*the_target->resume) (&resume_info, 1);
- mywait (&last_status, 0);
+ mywait (pid_to_ptid (signal_pid), &last_status, 0, 0);
if (last_status.kind != TARGET_WAITKIND_STOPPED)
return signal_pid;
+
+ current_inferior->last_resume_kind = resume_stop;
+ current_inferior->last_status = last_status;
}
while (last_status.value.sig != TARGET_SIGNAL_TRAP);
+ current_inferior->last_resume_kind = resume_stop;
+ current_inferior->last_status = last_status;
return signal_pid;
}
/* Wait till we are at 1st instruction in program, return new pid
(assuming success). */
- last_ptid = mywait (&last_status, 0);
+ last_ptid = mywait (pid_to_ptid (signal_pid), &last_status, 0, 0);
+
+ if (last_status.kind != TARGET_WAITKIND_EXITED
+ && last_status.kind != TARGET_WAITKIND_SIGNALLED)
+ {
+ current_inferior->last_resume_kind = resume_stop;
+ current_inferior->last_status = last_status;
+ }
return signal_pid;
}
if (myattach (pid) != 0)
return -1;
- attached = 1;
-
fprintf (stderr, "Attached; pid = %d\n", pid);
fflush (stderr);
whichever we were told to attach to. */
signal_pid = pid;
- last_ptid = mywait (&last_status, 0);
+ if (!non_stop)
+ {
+ last_ptid = mywait (pid_to_ptid (pid), &last_status, 0, 0);
+
+ /* GDB knows to ignore the first SIGSTOP after attaching to a running
+ process using the "attach" command, but this is different; it's
+ just using "target remote". Pretend it's just starting up. */
+ if (last_status.kind == TARGET_WAITKIND_STOPPED
+ && last_status.value.sig == TARGET_SIGNAL_STOP)
+ last_status.value.sig = TARGET_SIGNAL_TRAP;
- /* GDB knows to ignore the first SIGSTOP after attaching to a running
- process using the "attach" command, but this is different; it's
- just using "target remote". Pretend it's just starting up. */
- if (last_status.kind == TARGET_WAITKIND_STOPPED
- && last_status.value.sig == TARGET_SIGNAL_STOP)
- last_status.value.sig = TARGET_SIGNAL_TRAP;
+ current_inferior->last_resume_kind = resume_stop;
+ current_inferior->last_status = last_status;
+ }
return 0;
}
or -1 otherwise. */
static int
-decode_xfer_read (char *buf, char **annex, CORE_ADDR *ofs, unsigned int *len)
+decode_xfer_read (char *buf, CORE_ADDR *ofs, unsigned int *len)
+{
+ /* After the read marker and annex, qXfer looks like a
+ traditional 'm' packet. */
+ decode_m_packet (buf, ofs, len);
+
+ return 0;
+}
+
+static int
+decode_xfer (char *buf, char **object, char **rw, char **annex, char **offset)
{
+ /* Extract and NUL-terminate the object. */
+ *object = buf;
+ while (*buf && *buf != ':')
+ buf++;
+ if (*buf == '\0')
+ return -1;
+ *buf++ = 0;
+
+ /* Extract and NUL-terminate the read/write action. */
+ *rw = buf;
+ while (*buf && *buf != ':')
+ buf++;
+ if (*buf == '\0')
+ return -1;
+ *buf++ = 0;
+
/* Extract and NUL-terminate the annex. */
*annex = buf;
while (*buf && *buf != ':')
return -1;
*buf++ = 0;
- /* After the read marker and annex, qXfer looks like a
- traditional 'm' packet. */
- decode_m_packet (buf, ofs, len);
-
+ *offset = buf;
return 0;
}
}
/* Handle all of the extended 'Q' packets. */
-void
+
+static void
handle_general_set (char *own_buf)
{
if (strncmp ("QPassSignals:", own_buf, strlen ("QPassSignals:")) == 0)
return;
}
+ if (strncmp (own_buf, "QNonStop:", 9) == 0)
+ {
+ char *mode = own_buf + 9;
+ int req = -1;
+ char *req_str;
+
+ if (strcmp (mode, "0") == 0)
+ req = 0;
+ else if (strcmp (mode, "1") == 0)
+ req = 1;
+ else
+ {
+ /* We don't know what this mode is, so complain to
+ GDB. */
+ fprintf (stderr, "Unknown non-stop mode requested: %s\n",
+ own_buf);
+ write_enn (own_buf);
+ return;
+ }
+
+ req_str = req ? "non-stop" : "all-stop";
+ if (start_non_stop (req) != 0)
+ {
+ fprintf (stderr, "Setting %s mode failed\n", req_str);
+ write_enn (own_buf);
+ return;
+ }
+
+ non_stop = req;
+
+ if (remote_debug)
+ fprintf (stderr, "[%s mode enabled]\n", req_str);
+
+ write_ok (own_buf);
+ return;
+ }
+
+ if (target_supports_tracepoints ()
+ && handle_tracepoint_general_set (own_buf))
+ return;
+
/* Otherwise we didn't know what packet it was. Say we didn't
understand it. */
own_buf[0] = 0;
monitor_output ("The following monitor commands are supported:\n");
monitor_output (" set debug <0|1>\n");
monitor_output (" Enable general debugging messages\n");
+ monitor_output (" set debug-hw-points <0|1>\n");
+ monitor_output (" Enable h/w breakpoint/watchpoint debugging messages\n");
monitor_output (" set remote-debug <0|1>\n");
monitor_output (" Enable remote protocol debugging messages\n");
monitor_output (" exit\n");
monitor_output (" Quit GDBserver\n");
}
+/* Read trace frame or inferior memory. */
+
+static int
+gdb_read_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len)
+{
+ int ret;
+
+ if (current_traceframe >= 0)
+ {
+ ULONGEST nbytes;
+ ULONGEST length = len;
+
+ if (traceframe_read_mem (current_traceframe,
+ memaddr, myaddr, len, &nbytes))
+ return EIO;
+ /* Data read from trace buffer, we're done. */
+ if (nbytes == length)
+ return 0;
+ if (!in_readonly_region (memaddr, length))
+ return EIO;
+ /* Otherwise we have a valid readonly case, fall through. */
+ /* (assume no half-trace half-real blocks for now) */
+ }
+
+ ret = prepare_to_access_memory ();
+ if (ret == 0)
+ {
+ ret = read_inferior_memory (memaddr, myaddr, len);
+ done_accessing_memory ();
+ }
+
+ return ret;
+}
+
+/* Write trace frame or inferior memory. Actually, writing to trace
+ frames is forbidden. */
+
+static int
+gdb_write_memory (CORE_ADDR memaddr, const unsigned char *myaddr, int len)
+{
+ if (current_traceframe >= 0)
+ return EIO;
+ else
+ {
+ int ret;
+
+ ret = prepare_to_access_memory ();
+ if (ret == 0)
+ {
+ ret = write_inferior_memory (memaddr, myaddr, len);
+ done_accessing_memory ();
+ }
+ return ret;
+ }
+}
+
/* Subroutine of handle_search_memory to simplify it. */
static int
{
/* Prime the search buffer. */
- if (read_inferior_memory (start_addr, search_buf, search_buf_size) != 0)
+ if (gdb_read_memory (start_addr, search_buf, search_buf_size) != 0)
{
warning ("Unable to access target memory at 0x%lx, halting search.",
(long) start_addr);
if (search_space_len >= pattern_len)
{
unsigned keep_len = search_buf_size - chunk_size;
- CORE_ADDR read_addr = start_addr + keep_len;
+ CORE_ADDR read_addr = start_addr + chunk_size + keep_len;
int nr_to_read;
/* Copy the trailing part of the previous iteration to the front
? search_space_len - keep_len
: chunk_size);
- if (read_inferior_memory (read_addr, search_buf + keep_len,
- nr_to_read) != 0)
+ if (gdb_read_memory (read_addr, search_buf + keep_len,
+ nr_to_read) != 0)
{
- warning ("Unable to access target memory at 0x%lx, halting search.",
+ warning ("Unable to access target memory "
+ "at 0x%lx, halting search.",
(long) read_addr);
return -1;
}
return; \
}
-/* Handle all of the extended 'q' packets. */
-void
-handle_query (char *own_buf, int packet_len, int *new_packet_len_p)
-{
- static struct inferior_list_entry *thread_ptr;
+/* Handle monitor commands not handled by target-specific handlers. */
- /* Reply the current thread id. */
- if (strcmp ("qC", own_buf) == 0 && !disable_packet_qC)
+static void
+handle_monitor_command (char *mon)
+{
+ if (strcmp (mon, "set debug 1") == 0)
{
- require_running (own_buf);
- thread_ptr = all_threads.head;
- sprintf (own_buf, "QC%x",
- thread_to_gdb_id ((struct thread_info *)thread_ptr));
- return;
+ debug_threads = 1;
+ monitor_output ("Debug output enabled.\n");
}
-
- if (strcmp ("qSymbol::", own_buf) == 0)
+ else if (strcmp (mon, "set debug 0") == 0)
{
- if (target_running () && the_target->look_up_symbols != NULL)
- (*the_target->look_up_symbols) ();
-
- strcpy (own_buf, "OK");
- return;
+ debug_threads = 0;
+ monitor_output ("Debug output disabled.\n");
}
-
- if (!disable_packet_qfThreadInfo)
+ else if (strcmp (mon, "set debug-hw-points 1") == 0)
{
- if (strcmp ("qfThreadInfo", own_buf) == 0)
- {
- require_running (own_buf);
- thread_ptr = all_threads.head;
- sprintf (own_buf, "m%x",
- thread_to_gdb_id ((struct thread_info *)thread_ptr));
- thread_ptr = thread_ptr->next;
- return;
- }
-
- if (strcmp ("qsThreadInfo", own_buf) == 0)
- {
- require_running (own_buf);
- if (thread_ptr != NULL)
- {
- sprintf (own_buf, "m%x",
- thread_to_gdb_id ((struct thread_info *)thread_ptr));
- thread_ptr = thread_ptr->next;
- return;
- }
- else
- {
- sprintf (own_buf, "l");
- return;
- }
- }
+ debug_hw_points = 1;
+ monitor_output ("H/W point debugging output enabled.\n");
}
-
- if (the_target->read_offsets != NULL
- && strcmp ("qOffsets", own_buf) == 0)
+ else if (strcmp (mon, "set debug-hw-points 0") == 0)
{
- CORE_ADDR text, data;
-
- require_running (own_buf);
- if (the_target->read_offsets (&text, &data))
- sprintf (own_buf, "Text=%lX;Data=%lX;Bss=%lX",
- (long)text, (long)data, (long)data);
- else
- write_enn (own_buf);
-
- return;
+ debug_hw_points = 0;
+ monitor_output ("H/W point debugging output disabled.\n");
}
-
- if (the_target->qxfer_spu != NULL
- && strncmp ("qXfer:spu:read:", own_buf, 15) == 0)
+ else if (strcmp (mon, "set remote-debug 1") == 0)
{
- char *annex;
- int n;
- unsigned int len;
- CORE_ADDR ofs;
- unsigned char *spu_buf;
-
- require_running (own_buf);
- strcpy (own_buf, "E00");
- if (decode_xfer_read (own_buf + 15, &annex, &ofs, &len) < 0)
- return;
- if (len > PBUFSIZ - 2)
- len = PBUFSIZ - 2;
- spu_buf = malloc (len + 1);
- if (!spu_buf)
- return;
-
- n = (*the_target->qxfer_spu) (annex, spu_buf, NULL, ofs, len + 1);
- if (n < 0)
- write_enn (own_buf);
- else if (n > len)
- *new_packet_len_p = write_qxfer_response (own_buf, spu_buf, len, 1);
- else
- *new_packet_len_p = write_qxfer_response (own_buf, spu_buf, n, 0);
-
- free (spu_buf);
- return;
+ remote_debug = 1;
+ monitor_output ("Protocol debug output enabled.\n");
}
-
- if (the_target->qxfer_spu != NULL
- && strncmp ("qXfer:spu:write:", own_buf, 16) == 0)
+ else if (strcmp (mon, "set remote-debug 0") == 0)
{
- char *annex;
- int n;
- unsigned int len;
- CORE_ADDR ofs;
- unsigned char *spu_buf;
+ remote_debug = 0;
+ monitor_output ("Protocol debug output disabled.\n");
+ }
+ else if (strcmp (mon, "help") == 0)
+ monitor_show_help ();
+ else if (strcmp (mon, "exit") == 0)
+ exit_requested = 1;
+ else
+ {
+ monitor_output ("Unknown monitor command.\n\n");
+ monitor_show_help ();
+ write_enn (own_buf);
+ }
+}
- require_running (own_buf);
- strcpy (own_buf, "E00");
- spu_buf = malloc (packet_len - 15);
- if (!spu_buf)
- return;
- if (decode_xfer_write (own_buf + 16, packet_len - 16, &annex,
- &ofs, &len, spu_buf) < 0)
- {
- free (spu_buf);
- return;
- }
+/* Associates a callback with each supported qXfer'able object. */
- n = (*the_target->qxfer_spu)
- (annex, NULL, (unsigned const char *)spu_buf, ofs, len);
- if (n < 0)
- write_enn (own_buf);
- else
- sprintf (own_buf, "%x", n);
+struct qxfer
+{
+ /* The object this handler handles. */
+ const char *object;
- free (spu_buf);
- return;
- }
+ /* Request that the target transfer up to LEN 8-bit bytes of the
+ target's OBJECT. The OFFSET, for a seekable object, specifies
+ the starting point. The ANNEX can be used to provide additional
+ data-specific information to the target.
- if (the_target->read_auxv != NULL
- && strncmp ("qXfer:auxv:read:", own_buf, 16) == 0)
- {
- unsigned char *data;
- int n;
- CORE_ADDR ofs;
- unsigned int len;
- char *annex;
+ Return the number of bytes actually transfered, zero when no
+ further transfer is possible, -1 on error, and -2 when the
+ transfer is not supported. Return of a positive value smaller
+ than LEN does not indicate the end of the object, only the end of
+ the transfer.
- require_running (own_buf);
+ One, and only one, of readbuf or writebuf must be non-NULL. */
+ int (*xfer) (const char *annex,
+ gdb_byte *readbuf, const gdb_byte *writebuf,
+ ULONGEST offset, LONGEST len);
+};
- /* Reject any annex; grab the offset and length. */
- if (decode_xfer_read (own_buf + 16, &annex, &ofs, &len) < 0
- || annex[0] != '\0')
- {
- strcpy (own_buf, "E00");
- return;
- }
+/* Handle qXfer:auxv:read. */
- /* Read one extra byte, as an indicator of whether there is
- more. */
- if (len > PBUFSIZ - 2)
- len = PBUFSIZ - 2;
- data = malloc (len + 1);
- if (data == NULL)
- {
- write_enn (own_buf);
- return;
- }
- n = (*the_target->read_auxv) (ofs, data, len + 1);
- if (n < 0)
- write_enn (own_buf);
- else if (n > len)
- *new_packet_len_p = write_qxfer_response (own_buf, data, len, 1);
- else
- *new_packet_len_p = write_qxfer_response (own_buf, data, n, 0);
+static int
+handle_qxfer_auxv (const char *annex,
+ gdb_byte *readbuf, const gdb_byte *writebuf,
+ ULONGEST offset, LONGEST len)
+{
+ if (the_target->read_auxv == NULL || writebuf != NULL)
+ return -2;
- free (data);
+ if (annex[0] != '\0' || !target_running ())
+ return -1;
- return;
- }
+ return (*the_target->read_auxv) (offset, readbuf, len);
+}
- if (strncmp ("qXfer:features:read:", own_buf, 20) == 0)
- {
- CORE_ADDR ofs;
- unsigned int len, total_len;
- const char *document;
- char *annex;
+/* Handle qXfer:features:read. */
- require_running (own_buf);
+static int
+handle_qxfer_features (const char *annex,
+ gdb_byte *readbuf, const gdb_byte *writebuf,
+ ULONGEST offset, LONGEST len)
+{
+ const char *document;
+ size_t total_len;
- /* Grab the annex, offset, and length. */
- if (decode_xfer_read (own_buf + 20, &annex, &ofs, &len) < 0)
- {
- strcpy (own_buf, "E00");
- return;
- }
+ if (writebuf != NULL)
+ return -2;
- /* Now grab the correct annex. */
- document = get_features_xml (annex);
- if (document == NULL)
- {
- strcpy (own_buf, "E00");
- return;
- }
+ if (!target_running ())
+ return -1;
- total_len = strlen (document);
- if (len > PBUFSIZ - 2)
- len = PBUFSIZ - 2;
+ /* Grab the correct annex. */
+ document = get_features_xml (annex);
+ if (document == NULL)
+ return -1;
- if (ofs > total_len)
- write_enn (own_buf);
- else if (len < total_len - ofs)
- *new_packet_len_p = write_qxfer_response (own_buf, document + ofs,
- len, 1);
- else
- *new_packet_len_p = write_qxfer_response (own_buf, document + ofs,
- total_len - ofs, 0);
+ total_len = strlen (document);
- return;
+ if (offset > total_len)
+ return -1;
+
+ if (offset + len > total_len)
+ len = total_len - offset;
+
+ memcpy (readbuf, document + offset, len);
+ return len;
+}
+
+/* Handle qXfer:libraries:read. */
+
+static int
+handle_qxfer_libraries (const char *annex,
+ gdb_byte *readbuf, const gdb_byte *writebuf,
+ ULONGEST offset, LONGEST len)
+{
+ unsigned int total_len;
+ char *document, *p;
+ struct inferior_list_entry *dll_ptr;
+
+ if (writebuf != NULL)
+ return -2;
+
+ if (annex[0] != '\0' || !target_running ())
+ return -1;
+
+ /* Over-estimate the necessary memory. Assume that every character
+ in the library name must be escaped. */
+ total_len = 64;
+ for (dll_ptr = all_dlls.head; dll_ptr != NULL; dll_ptr = dll_ptr->next)
+ total_len += 128 + 6 * strlen (((struct dll_info *) dll_ptr)->name);
+
+ document = malloc (total_len);
+ if (document == NULL)
+ return -1;
+
+ strcpy (document, "<library-list>\n");
+ p = document + strlen (document);
+
+ for (dll_ptr = all_dlls.head; dll_ptr != NULL; dll_ptr = dll_ptr->next)
+ {
+ struct dll_info *dll = (struct dll_info *) dll_ptr;
+ char *name;
+
+ strcpy (p, " <library name=\"");
+ p = p + strlen (p);
+ name = xml_escape_text (dll->name);
+ strcpy (p, name);
+ free (name);
+ p = p + strlen (p);
+ strcpy (p, "\"><segment address=\"");
+ p = p + strlen (p);
+ sprintf (p, "0x%lx", (long) dll->base_addr);
+ p = p + strlen (p);
+ strcpy (p, "\"/></library>\n");
+ p = p + strlen (p);
}
- if (strncmp ("qXfer:libraries:read:", own_buf, 21) == 0)
+ strcpy (p, "</library-list>\n");
+
+ total_len = strlen (document);
+
+ if (offset > total_len)
{
- CORE_ADDR ofs;
- unsigned int len, total_len;
- char *document, *p;
- struct inferior_list_entry *dll_ptr;
- char *annex;
+ free (document);
+ return -1;
+ }
- require_running (own_buf);
+ if (offset + len > total_len)
+ len = total_len - offset;
- /* Reject any annex; grab the offset and length. */
- if (decode_xfer_read (own_buf + 21, &annex, &ofs, &len) < 0
- || annex[0] != '\0')
- {
- strcpy (own_buf, "E00");
- return;
- }
+ memcpy (readbuf, document + offset, len);
+ free (document);
+ return len;
+}
+
+/* Handle qXfer:osadata:read. */
+
+static int
+handle_qxfer_osdata (const char *annex,
+ gdb_byte *readbuf, const gdb_byte *writebuf,
+ ULONGEST offset, LONGEST len)
+{
+ if (the_target->qxfer_osdata == NULL || writebuf != NULL)
+ return -2;
+
+ return (*the_target->qxfer_osdata) (annex, readbuf, NULL, offset, len);
+}
+
+/* Handle qXfer:siginfo:read and qXfer:siginfo:write. */
+
+static int
+handle_qxfer_siginfo (const char *annex,
+ gdb_byte *readbuf, const gdb_byte *writebuf,
+ ULONGEST offset, LONGEST len)
+{
+ if (the_target->qxfer_siginfo == NULL)
+ return -2;
+
+ if (annex[0] != '\0' || !target_running ())
+ return -1;
+
+ return (*the_target->qxfer_siginfo) (annex, readbuf, writebuf, offset, len);
+}
+
+/* Handle qXfer:spu:read and qXfer:spu:write. */
+
+static int
+handle_qxfer_spu (const char *annex,
+ gdb_byte *readbuf, const gdb_byte *writebuf,
+ ULONGEST offset, LONGEST len)
+{
+ if (the_target->qxfer_spu == NULL)
+ return -2;
+
+ if (!target_running ())
+ return -1;
+
+ return (*the_target->qxfer_spu) (annex, readbuf, writebuf, offset, len);
+}
+
+/* Handle qXfer:statictrace:read. */
+
+static int
+handle_qxfer_statictrace (const char *annex,
+ gdb_byte *readbuf, const gdb_byte *writebuf,
+ ULONGEST offset, LONGEST len)
+{
+ ULONGEST nbytes;
+
+ if (writebuf != NULL)
+ return -2;
+
+ if (annex[0] != '\0' || !target_running () || current_traceframe == -1)
+ return -1;
+
+ if (traceframe_read_sdata (current_traceframe, offset,
+ readbuf, len, &nbytes))
+ return -1;
+ return nbytes;
+}
- /* Over-estimate the necessary memory. Assume that every character
- in the library name must be escaped. */
- total_len = 64;
- for (dll_ptr = all_dlls.head; dll_ptr != NULL; dll_ptr = dll_ptr->next)
- total_len += 128 + 6 * strlen (((struct dll_info *) dll_ptr)->name);
+/* Helper for handle_qxfer_threads. */
- document = malloc (total_len);
- if (document == NULL)
+static void
+handle_qxfer_threads_proper (struct buffer *buffer)
+{
+ struct inferior_list_entry *thread;
+
+ buffer_grow_str (buffer, "<threads>\n");
+
+ for (thread = all_threads.head; thread; thread = thread->next)
+ {
+ ptid_t ptid = thread_to_gdb_id ((struct thread_info *)thread);
+ char ptid_s[100];
+ int core = -1;
+ char core_s[21];
+
+ write_ptid (ptid_s, ptid);
+
+ if (the_target->core_of_thread)
+ core = (*the_target->core_of_thread) (ptid);
+
+ if (core != -1)
{
- write_enn (own_buf);
- return;
+ sprintf (core_s, "%d", core);
+ buffer_xml_printf (buffer, "<thread id=\"%s\" core=\"%s\"/>\n",
+ ptid_s, core_s);
}
- strcpy (document, "<library-list>\n");
- p = document + strlen (document);
-
- for (dll_ptr = all_dlls.head; dll_ptr != NULL; dll_ptr = dll_ptr->next)
+ else
{
- struct dll_info *dll = (struct dll_info *) dll_ptr;
- char *name;
-
- strcpy (p, " <library name=\"");
- p = p + strlen (p);
- name = xml_escape_text (dll->name);
- strcpy (p, name);
- free (name);
- p = p + strlen (p);
- strcpy (p, "\"><segment address=\"");
- p = p + strlen (p);
- sprintf (p, "0x%lx", (long) dll->base_addr);
- p = p + strlen (p);
- strcpy (p, "\"/></library>\n");
- p = p + strlen (p);
+ buffer_xml_printf (buffer, "<thread id=\"%s\"/>\n",
+ ptid_s);
}
+ }
- strcpy (p, "</library-list>\n");
+ buffer_grow_str0 (buffer, "</threads>\n");
+}
- total_len = strlen (document);
- if (len > PBUFSIZ - 2)
- len = PBUFSIZ - 2;
+/* Handle qXfer:threads:read. */
- if (ofs > total_len)
- write_enn (own_buf);
- else if (len < total_len - ofs)
- *new_packet_len_p = write_qxfer_response (own_buf, document + ofs,
- len, 1);
- else
- *new_packet_len_p = write_qxfer_response (own_buf, document + ofs,
- total_len - ofs, 0);
+static int
+handle_qxfer_threads (const char *annex,
+ gdb_byte *readbuf, const gdb_byte *writebuf,
+ ULONGEST offset, LONGEST len)
+{
+ static char *result = 0;
+ static unsigned int result_length = 0;
- free (document);
- return;
+ if (writebuf != NULL)
+ return -2;
+
+ if (!target_running () || annex[0] != '\0')
+ return -1;
+
+ if (offset == 0)
+ {
+ struct buffer buffer;
+ /* When asked for data at offset 0, generate everything and store into
+ 'result'. Successive reads will be served off 'result'. */
+ if (result)
+ free (result);
+
+ buffer_init (&buffer);
+
+ handle_qxfer_threads_proper (&buffer);
+
+ result = buffer_finish (&buffer);
+ result_length = strlen (result);
+ buffer_free (&buffer);
}
- if (the_target->qxfer_osdata != NULL
- && strncmp ("qXfer:osdata:read:", own_buf, 18) == 0)
+ if (offset >= result_length)
{
- char *annex;
- int n;
- unsigned int len;
- CORE_ADDR ofs;
- unsigned char *workbuf;
+ /* We're out of data. */
+ free (result);
+ result = NULL;
+ result_length = 0;
+ return 0;
+ }
- strcpy (own_buf, "E00");
- if (decode_xfer_read (own_buf + 18, &annex, &ofs, &len) < 0)
- return;
- if (len > PBUFSIZ - 2)
- len = PBUFSIZ - 2;
- workbuf = malloc (len + 1);
- if (!workbuf)
- return;
-
- n = (*the_target->qxfer_osdata) (annex, workbuf, NULL, ofs, len + 1);
- if (n < 0)
- write_enn (own_buf);
- else if (n > len)
- *new_packet_len_p = write_qxfer_response (own_buf, workbuf, len, 1);
- else
- *new_packet_len_p = write_qxfer_response (own_buf, workbuf, n, 0);
+ if (len > result_length - offset)
+ len = result_length - offset;
- free (workbuf);
- return;
+ memcpy (readbuf, result + offset, len);
+
+ return len;
+}
+
+static const struct qxfer qxfer_packets[] =
+ {
+ { "auxv", handle_qxfer_auxv },
+ { "features", handle_qxfer_features },
+ { "libraries", handle_qxfer_libraries },
+ { "osdata", handle_qxfer_osdata },
+ { "siginfo", handle_qxfer_siginfo },
+ { "spu", handle_qxfer_spu },
+ { "statictrace", handle_qxfer_statictrace },
+ { "threads", handle_qxfer_threads },
+ };
+
+static int
+handle_qxfer (char *own_buf, int packet_len, int *new_packet_len_p)
+{
+ int i;
+ char *object;
+ char *rw;
+ char *annex;
+ char *offset;
+
+ if (strncmp (own_buf, "qXfer:", 6) != 0)
+ return 0;
+
+ /* Grab the object, r/w and annex. */
+ if (decode_xfer (own_buf + 6, &object, &rw, &annex, &offset) < 0)
+ {
+ write_enn (own_buf);
+ return 1;
}
- if (the_target->qxfer_siginfo != NULL
- && strncmp ("qXfer:siginfo:read:", own_buf, 19) == 0)
+ for (i = 0;
+ i < sizeof (qxfer_packets) / sizeof (qxfer_packets[0]);
+ i++)
{
- unsigned char *data;
- int n;
- CORE_ADDR ofs;
- unsigned int len;
- char *annex;
+ const struct qxfer *q = &qxfer_packets[i];
- require_running (own_buf);
+ if (strcmp (object, q->object) == 0)
+ {
+ if (strcmp (rw, "read") == 0)
+ {
+ unsigned char *data;
+ int n;
+ CORE_ADDR ofs;
+ unsigned int len;
- /* Reject any annex; grab the offset and length. */
- if (decode_xfer_read (own_buf + 19, &annex, &ofs, &len) < 0
- || annex[0] != '\0')
+ /* Grab the offset and length. */
+ if (decode_xfer_read (offset, &ofs, &len) < 0)
+ {
+ write_enn (own_buf);
+ return 1;
+ }
+
+ /* Read one extra byte, as an indicator of whether there is
+ more. */
+ if (len > PBUFSIZ - 2)
+ len = PBUFSIZ - 2;
+ data = malloc (len + 1);
+ if (data == NULL)
+ {
+ write_enn (own_buf);
+ return 1;
+ }
+ n = (*q->xfer) (annex, data, NULL, ofs, len + 1);
+ if (n == -2)
+ {
+ free (data);
+ return 0;
+ }
+ else if (n < 0)
+ write_enn (own_buf);
+ else if (n > len)
+ *new_packet_len_p = write_qxfer_response (own_buf, data, len, 1);
+ else
+ *new_packet_len_p = write_qxfer_response (own_buf, data, n, 0);
+
+ free (data);
+ return 1;
+ }
+ else if (strcmp (rw, "write") == 0)
+ {
+ int n;
+ unsigned int len;
+ CORE_ADDR ofs;
+ unsigned char *data;
+
+ strcpy (own_buf, "E00");
+ data = malloc (packet_len - (offset - own_buf));
+ if (data == NULL)
+ {
+ write_enn (own_buf);
+ return 1;
+ }
+ if (decode_xfer_write (offset, packet_len - (offset - own_buf),
+ &ofs, &len, data) < 0)
+ {
+ free (data);
+ write_enn (own_buf);
+ return 1;
+ }
+
+ n = (*q->xfer) (annex, NULL, data, ofs, len);
+ if (n == -2)
+ {
+ free (data);
+ return 0;
+ }
+ else if (n < 0)
+ write_enn (own_buf);
+ else
+ sprintf (own_buf, "%x", n);
+
+ free (data);
+ return 1;
+ }
+
+ return 0;
+ }
+ }
+
+ return 0;
+}
+
+/* Table used by the crc32 function to calcuate the checksum. */
+
+static unsigned int crc32_table[256] =
+{0, 0};
+
+/* Compute 32 bit CRC from inferior memory.
+
+ On success, return 32 bit CRC.
+ On failure, return (unsigned long long) -1. */
+
+static unsigned long long
+crc32 (CORE_ADDR base, int len, unsigned int crc)
+{
+ if (!crc32_table[1])
+ {
+ /* Initialize the CRC table and the decoding table. */
+ int i, j;
+ unsigned int c;
+
+ for (i = 0; i < 256; i++)
{
- strcpy (own_buf, "E00");
- return;
+ for (c = i << 24, j = 8; j > 0; --j)
+ c = c & 0x80000000 ? (c << 1) ^ 0x04c11db7 : (c << 1);
+ crc32_table[i] = c;
}
+ }
- /* Read one extra byte, as an indicator of whether there is
- more. */
- if (len > PBUFSIZ - 2)
- len = PBUFSIZ - 2;
- data = malloc (len + 1);
- if (!data)
- return;
- n = (*the_target->qxfer_siginfo) (annex, data, NULL, ofs, len + 1);
- if (n < 0)
- write_enn (own_buf);
- else if (n > len)
- *new_packet_len_p = write_qxfer_response (own_buf, data, len, 1);
+ while (len--)
+ {
+ unsigned char byte = 0;
+
+ /* Return failure if memory read fails. */
+ if (read_inferior_memory (base, &byte, 1) != 0)
+ return (unsigned long long) -1;
+
+ crc = (crc << 8) ^ crc32_table[((crc >> 24) ^ byte) & 255];
+ base++;
+ }
+ return (unsigned long long) crc;
+}
+
+/* Handle all of the extended 'q' packets. */
+
+void
+handle_query (char *own_buf, int packet_len, int *new_packet_len_p)
+{
+ static struct inferior_list_entry *thread_ptr;
+
+ /* Reply the current thread id. */
+ if (strcmp ("qC", own_buf) == 0 && !disable_packet_qC)
+ {
+ ptid_t gdb_id;
+ require_running (own_buf);
+
+ if (!ptid_equal (general_thread, null_ptid)
+ && !ptid_equal (general_thread, minus_one_ptid))
+ gdb_id = general_thread;
else
- *new_packet_len_p = write_qxfer_response (own_buf, data, n, 0);
+ {
+ thread_ptr = all_threads.head;
+ gdb_id = thread_to_gdb_id ((struct thread_info *)thread_ptr);
+ }
- free (data);
+ sprintf (own_buf, "QC");
+ own_buf += 2;
+ own_buf = write_ptid (own_buf, gdb_id);
return;
}
- if (the_target->qxfer_siginfo != NULL
- && strncmp ("qXfer:siginfo:write:", own_buf, 20) == 0)
+ if (strcmp ("qSymbol::", own_buf) == 0)
{
- char *annex;
- int n;
- unsigned int len;
- CORE_ADDR ofs;
- unsigned char *data;
+ /* GDB is suggesting new symbols have been loaded. This may
+ mean a new shared library has been detected as loaded, so
+ take the opportunity to check if breakpoints we think are
+ inserted, still are. Note that it isn't guaranteed that
+ we'll see this when a shared library is loaded, and nor will
+ we see this for unloads (although breakpoints in unloaded
+ libraries shouldn't trigger), as GDB may not find symbols for
+ the library at all. We also re-validate breakpoints when we
+ see a second GDB breakpoint for the same address, and or when
+ we access breakpoint shadows. */
+ validate_breakpoints ();
+
+ if (target_supports_tracepoints ())
+ tracepoint_look_up_symbols ();
- require_running (own_buf);
+ if (target_running () && the_target->look_up_symbols != NULL)
+ (*the_target->look_up_symbols) ();
- strcpy (own_buf, "E00");
- data = malloc (packet_len - 19);
- if (!data)
- return;
- if (decode_xfer_write (own_buf + 20, packet_len - 20, &annex,
- &ofs, &len, data) < 0)
+ strcpy (own_buf, "OK");
+ return;
+ }
+
+ if (!disable_packet_qfThreadInfo)
+ {
+ if (strcmp ("qfThreadInfo", own_buf) == 0)
{
- free (data);
+ ptid_t gdb_id;
+
+ require_running (own_buf);
+ thread_ptr = all_threads.head;
+
+ *own_buf++ = 'm';
+ gdb_id = thread_to_gdb_id ((struct thread_info *)thread_ptr);
+ write_ptid (own_buf, gdb_id);
+ thread_ptr = thread_ptr->next;
return;
}
- n = (*the_target->qxfer_siginfo)
- (annex, NULL, (unsigned const char *)data, ofs, len);
- if (n < 0)
- write_enn (own_buf);
+ if (strcmp ("qsThreadInfo", own_buf) == 0)
+ {
+ ptid_t gdb_id;
+
+ require_running (own_buf);
+ if (thread_ptr != NULL)
+ {
+ *own_buf++ = 'm';
+ gdb_id = thread_to_gdb_id ((struct thread_info *)thread_ptr);
+ write_ptid (own_buf, gdb_id);
+ thread_ptr = thread_ptr->next;
+ return;
+ }
+ else
+ {
+ sprintf (own_buf, "l");
+ return;
+ }
+ }
+ }
+
+ if (the_target->read_offsets != NULL
+ && strcmp ("qOffsets", own_buf) == 0)
+ {
+ CORE_ADDR text, data;
+
+ require_running (own_buf);
+ if (the_target->read_offsets (&text, &data))
+ sprintf (own_buf, "Text=%lX;Data=%lX;Bss=%lX",
+ (long)text, (long)data, (long)data);
else
- sprintf (own_buf, "%x", n);
+ write_enn (own_buf);
- free (data);
return;
}
if (strncmp ("qSupported", own_buf, 10) == 0
&& (own_buf[10] == ':' || own_buf[10] == '\0'))
{
+ char *p = &own_buf[10];
+ int gdb_supports_qRelocInsn = 0;
+
+ /* Start processing qSupported packet. */
+ target_process_qsupported (NULL);
+
+ /* Process each feature being provided by GDB. The first
+ feature will follow a ':', and latter features will follow
+ ';'. */
+ if (*p == ':')
+ {
+ char **qsupported = NULL;
+ int count = 0;
+ int i;
+
+ /* Two passes, to avoid nested strtok calls in
+ target_process_qsupported. */
+ for (p = strtok (p + 1, ";");
+ p != NULL;
+ p = strtok (NULL, ";"))
+ {
+ count++;
+ qsupported = xrealloc (qsupported, count * sizeof (char *));
+ qsupported[count - 1] = xstrdup (p);
+ }
+
+ for (i = 0; i < count; i++)
+ {
+ p = qsupported[i];
+ if (strcmp (p, "multiprocess+") == 0)
+ {
+ /* GDB supports and wants multi-process support if
+ possible. */
+ if (target_supports_multi_process ())
+ multi_process = 1;
+ }
+ else if (strcmp (p, "qRelocInsn+") == 0)
+ {
+ /* GDB supports relocate instruction requests. */
+ gdb_supports_qRelocInsn = 1;
+ }
+ else
+ target_process_qsupported (p);
+
+ free (p);
+ }
+
+ free (qsupported);
+ }
+
sprintf (own_buf, "PacketSize=%x;QPassSignals+", PBUFSIZ - 1);
/* We do not have any hook to indicate whether the target backend
if (the_target->qxfer_osdata != NULL)
strcat (own_buf, ";qXfer:osdata:read+");
+ if (target_supports_multi_process ())
+ strcat (own_buf, ";multiprocess+");
+
+ if (target_supports_non_stop ())
+ strcat (own_buf, ";QNonStop+");
+
+ strcat (own_buf, ";qXfer:threads:read+");
+
+ if (target_supports_tracepoints ())
+ {
+ strcat (own_buf, ";ConditionalTracepoints+");
+ strcat (own_buf, ";TraceStateVariables+");
+ strcat (own_buf, ";TracepointSource+");
+ strcat (own_buf, ";DisconnectedTracing+");
+ if (gdb_supports_qRelocInsn && target_supports_fast_tracepoints ())
+ strcat (own_buf, ";FastTracepoints+");
+ strcat (own_buf, ";StaticTracepoints+");
+ strcat (own_buf, ";qXfer:statictrace:read+");
+ }
+
return;
}
char *p = own_buf + 12;
CORE_ADDR parts[2], address = 0;
int i, err;
- unsigned long ptid;
+ ptid_t ptid = null_ptid;
require_running (own_buf);
}
if (i == 0)
- ptid = strtoul (p, NULL, 16);
+ ptid = read_ptid (p, NULL);
else
decode_address (&parts[i - 1], p, len);
p = p2;
err = 1;
else
{
- struct thread_info *thread = gdb_id_to_thread (ptid);
+ struct thread_info *thread = find_thread_ptid (ptid);
if (thread == NULL)
err = 2;
if (err == 0)
{
- sprintf (own_buf, "%llx", address);
+ strcpy (own_buf, paddress(address));
return;
}
else if (err > 0)
/* Otherwise, pretend we do not understand this packet. */
}
+ /* Windows OS Thread Information Block address support. */
+ if (the_target->get_tib_address != NULL
+ && strncmp ("qGetTIBAddr:", own_buf, 12) == 0)
+ {
+ char *annex;
+ int n;
+ CORE_ADDR tlb;
+ ptid_t ptid = read_ptid (own_buf + 12, &annex);
+
+ n = (*the_target->get_tib_address) (ptid, &tlb);
+ if (n == 1)
+ {
+ strcpy (own_buf, paddress(tlb));
+ return;
+ }
+ else if (n == 0)
+ {
+ write_enn (own_buf);
+ return;
+ }
+ return;
+ }
+
/* Handle "monitor" commands. */
if (strncmp ("qRcmd,", own_buf, 6) == 0)
{
write_ok (own_buf);
- if (strcmp (mon, "set debug 1") == 0)
- {
- debug_threads = 1;
- monitor_output ("Debug output enabled.\n");
- }
- else if (strcmp (mon, "set debug 0") == 0)
- {
- debug_threads = 0;
- monitor_output ("Debug output disabled.\n");
- }
- else if (strcmp (mon, "set remote-debug 1") == 0)
+ if (the_target->handle_monitor_command == NULL
+ || (*the_target->handle_monitor_command) (mon) == 0)
+ /* Default processing. */
+ handle_monitor_command (mon);
+
+ free (mon);
+ return;
+ }
+
+ if (strncmp ("qSearch:memory:", own_buf,
+ sizeof ("qSearch:memory:") - 1) == 0)
+ {
+ require_running (own_buf);
+ handle_search_memory (own_buf, packet_len);
+ return;
+ }
+
+ if (strcmp (own_buf, "qAttached") == 0
+ || strncmp (own_buf, "qAttached:", sizeof ("qAttached:") - 1) == 0)
+ {
+ struct process_info *process;
+
+ if (own_buf[sizeof ("qAttached") - 1])
{
- remote_debug = 1;
- monitor_output ("Protocol debug output enabled.\n");
+ int pid = strtoul (own_buf + sizeof ("qAttached:") - 1, NULL, 16);
+ process = (struct process_info *)
+ find_inferior_id (&all_processes, pid_to_ptid (pid));
}
- else if (strcmp (mon, "set remote-debug 0") == 0)
+ else
{
- remote_debug = 0;
- monitor_output ("Protocol debug output disabled.\n");
+ require_running (own_buf);
+ process = current_process ();
}
- else if (strcmp (mon, "help") == 0)
- monitor_show_help ();
- else if (strcmp (mon, "exit") == 0)
- exit_requested = 1;
- else
+
+ if (process == NULL)
{
- monitor_output ("Unknown monitor command.\n\n");
- monitor_show_help ();
write_enn (own_buf);
+ return;
}
- free (mon);
+ strcpy (own_buf, process->attached ? "1" : "0");
return;
}
- if (strncmp ("qSearch:memory:", own_buf, sizeof ("qSearch:memory:") - 1) == 0)
+ if (strncmp ("qCRC:", own_buf, 5) == 0)
{
- require_running (own_buf);
- handle_search_memory (own_buf, packet_len);
- return;
- }
+ /* CRC check (compare-section). */
+ char *comma;
+ CORE_ADDR base;
+ int len;
+ unsigned long long crc;
- if (strcmp (own_buf, "qAttached") == 0)
- {
require_running (own_buf);
- strcpy (own_buf, attached ? "1" : "0");
+ base = strtoul (own_buf + 5, &comma, 16);
+ if (*comma++ != ',')
+ {
+ write_enn (own_buf);
+ return;
+ }
+ len = strtoul (comma, NULL, 16);
+ crc = crc32 (base, len, 0xffffffff);
+ /* Check for memory failure. */
+ if (crc == (unsigned long long) -1)
+ {
+ write_enn (own_buf);
+ return;
+ }
+ sprintf (own_buf, "C%lx", (unsigned long) crc);
return;
}
+ if (handle_qxfer (own_buf, packet_len, new_packet_len_p))
+ return;
+
+ if (target_supports_tracepoints () && handle_tracepoint_query (own_buf))
+ return;
+
/* Otherwise we didn't know what packet it was. Say we didn't
understand it. */
own_buf[0] = 0;
}
+static void gdb_wants_all_threads_stopped (void);
+
/* Parse vCont packets. */
void
handle_v_cont (char *own_buf)
char *p, *q;
int n = 0, i = 0;
struct thread_resume *resume_info;
- struct thread_resume default_action = {0};
+ struct thread_resume default_action = {{0}};
/* Count the number of semicolons in the packet. There should be one
for every action. */
p++;
if (p[0] == 's' || p[0] == 'S')
- resume_info[i].step = 1;
+ resume_info[i].kind = resume_step;
else if (p[0] == 'c' || p[0] == 'C')
- resume_info[i].step = 0;
+ resume_info[i].kind = resume_continue;
+ else if (p[0] == 't')
+ resume_info[i].kind = resume_stop;
else
goto err;
if (p[0] == 0)
{
- resume_info[i].thread = -1;
+ resume_info[i].thread = minus_one_ptid;
default_action = resume_info[i];
/* Note: we don't increment i here, we'll overwrite this entry
}
else if (p[0] == ':')
{
- unsigned int gdb_id = strtoul (p + 1, &q, 16);
- unsigned long thread_id;
+ ptid_t ptid = read_ptid (p + 1, &q);
if (p == q)
goto err;
if (p[0] != ';' && p[0] != 0)
goto err;
- thread_id = gdb_id_to_thread_id (gdb_id);
- if (thread_id)
- resume_info[i].thread = thread_id;
- else
- goto err;
+ resume_info[i].thread = ptid;
i++;
}
resume_info[i] = default_action;
/* Still used in occasional places in the backend. */
- if (n == 1 && resume_info[0].thread != -1)
+ if (n == 1
+ && !ptid_equal (resume_info[0].thread, minus_one_ptid)
+ && resume_info[0].kind != resume_stop)
cont_thread = resume_info[0].thread;
else
- cont_thread = -1;
+ cont_thread = minus_one_ptid;
set_desired_inferior (0);
- enable_async_io ();
+ if (!non_stop)
+ enable_async_io ();
+
(*the_target->resume) (resume_info, n);
free (resume_info);
- last_ptid = mywait (&last_status, 1);
- prepare_resume_reply (own_buf, last_ptid, &last_status);
- disable_async_io ();
+ if (non_stop)
+ write_ok (own_buf);
+ else
+ {
+ last_ptid = mywait (minus_one_ptid, &last_status, 0, 1);
+
+ if (last_status.kind != TARGET_WAITKIND_EXITED
+ && last_status.kind != TARGET_WAITKIND_SIGNALLED)
+ current_inferior->last_status = last_status;
+
+ /* From the client's perspective, all-stop mode always stops all
+ threads implicitly (and the target backend has already done
+ so by now). Tag all threads as "want-stopped", so we don't
+ resume them implicitly without the client telling us to. */
+ gdb_wants_all_threads_stopped ();
+ prepare_resume_reply (own_buf, last_ptid, &last_status);
+ disable_async_io ();
+
+ if (last_status.kind == TARGET_WAITKIND_EXITED
+ || last_status.kind == TARGET_WAITKIND_SIGNALLED)
+ mourn_inferior (find_process_pid (ptid_get_pid (last_ptid)));
+ }
return;
err:
library list. Avoids the "stopped by shared library event"
notice on the GDB side. */
dlls_changed = 0;
- prepare_resume_reply (own_buf, last_ptid, &last_status);
+
+ if (non_stop)
+ {
+ /* In non-stop, we don't send a resume reply. Stop events
+ will follow up using the normal notification
+ mechanism. */
+ write_ok (own_buf);
+ }
+ else
+ prepare_resume_reply (own_buf, last_ptid, &last_status);
+
return 1;
}
else
if (last_status.kind == TARGET_WAITKIND_STOPPED)
{
prepare_resume_reply (own_buf, last_ptid, &last_status);
+
+ /* In non-stop, sending a resume reply doesn't set the general
+ thread, but GDB assumes a vRun sets it (this is so GDB can
+ query which is the main thread of the new inferior. */
+ if (non_stop)
+ general_thread = last_ptid;
+
+ return 1;
+ }
+ else
+ {
+ write_enn (own_buf);
+ return 0;
+ }
+}
+
+/* Kill process. Return 1 if successful, 0 if failure. */
+int
+handle_v_kill (char *own_buf)
+{
+ int pid;
+ char *p = &own_buf[6];
+ if (multi_process)
+ pid = strtol (p, NULL, 16);
+ else
+ pid = signal_pid;
+ if (pid != 0 && kill_inferior (pid) == 0)
+ {
+ last_status.kind = TARGET_WAITKIND_SIGNALLED;
+ last_status.value.sig = TARGET_SIGNAL_KILL;
+ last_ptid = pid_to_ptid (pid);
+ discard_queued_stop_replies (pid);
+ write_ok (own_buf);
return 1;
}
else
}
}
+/* Handle a 'vStopped' packet. */
+static void
+handle_v_stopped (char *own_buf)
+{
+ /* If we're waiting for GDB to acknowledge a pending stop reply,
+ consider that done. */
+ if (notif_queue)
+ {
+ struct vstop_notif *head;
+
+ if (remote_debug)
+ fprintf (stderr, "vStopped: acking %s\n",
+ target_pid_to_str (notif_queue->ptid));
+
+ head = notif_queue;
+ notif_queue = notif_queue->next;
+ free (head);
+ }
+
+ /* Push another stop reply, or if there are no more left, an OK. */
+ send_next_stop_reply (own_buf);
+}
+
/* Handle all of the extended 'v' packets. */
void
handle_v_requests (char *own_buf, int packet_len, int *new_packet_len)
if (strncmp (own_buf, "vCont?", 6) == 0)
{
- strcpy (own_buf, "vCont;c;C;s;S");
+ strcpy (own_buf, "vCont;c;C;s;S;t");
return;
}
}
if (strncmp (own_buf, "vAttach;", 8) == 0)
{
- if (target_running ())
+ if (!multi_process && target_running ())
{
fprintf (stderr, "Already debugging a process\n");
write_enn (own_buf);
if (strncmp (own_buf, "vRun;", 5) == 0)
{
- if (target_running ())
+ if (!multi_process && target_running ())
{
fprintf (stderr, "Already debugging a process\n");
write_enn (own_buf);
return;
}
+ if (strncmp (own_buf, "vKill;", 6) == 0)
+ {
+ if (!target_running ())
+ {
+ fprintf (stderr, "No process to kill\n");
+ write_enn (own_buf);
+ return;
+ }
+ handle_v_kill (own_buf);
+ return;
+ }
+
+ if (strncmp (own_buf, "vStopped", 8) == 0)
+ {
+ handle_v_stopped (own_buf);
+ return;
+ }
+
/* Otherwise we didn't know what packet it was. Say we didn't
understand it. */
own_buf[0] = 0;
return;
}
-void
+/* Resume inferior and wait for another event. In non-stop mode,
+ don't really wait here, but return immediatelly to the event
+ loop. */
+static void
myresume (char *own_buf, int step, int sig)
{
struct thread_resume resume_info[2];
set_desired_inferior (0);
- valid_cont_thread = (cont_thread != 0 && cont_thread != -1);
+ valid_cont_thread = (!ptid_equal (cont_thread, null_ptid)
+ && !ptid_equal (cont_thread, minus_one_ptid));
if (step || sig || valid_cont_thread)
{
resume_info[0].thread
= ((struct inferior_list_entry *) current_inferior)->id;
- resume_info[0].step = step;
+ if (step)
+ resume_info[0].kind = resume_step;
+ else
+ resume_info[0].kind = resume_continue;
resume_info[0].sig = sig;
n++;
}
if (!valid_cont_thread)
{
- resume_info[n].thread = -1;
- resume_info[n].step = 0;
+ resume_info[n].thread = minus_one_ptid;
+ resume_info[n].kind = resume_continue;
resume_info[n].sig = 0;
n++;
}
- enable_async_io ();
+ if (!non_stop)
+ enable_async_io ();
+
(*the_target->resume) (resume_info, n);
- last_ptid = mywait (&last_status, 1);
- prepare_resume_reply (own_buf, last_ptid, &last_status);
- disable_async_io ();
+
+ if (non_stop)
+ write_ok (own_buf);
+ else
+ {
+ last_ptid = mywait (minus_one_ptid, &last_status, 0, 1);
+
+ if (last_status.kind != TARGET_WAITKIND_EXITED
+ && last_status.kind != TARGET_WAITKIND_SIGNALLED)
+ {
+ current_inferior->last_resume_kind = resume_stop;
+ current_inferior->last_status = last_status;
+ }
+
+ prepare_resume_reply (own_buf, last_ptid, &last_status);
+ disable_async_io ();
+
+ if (last_status.kind == TARGET_WAITKIND_EXITED
+ || last_status.kind == TARGET_WAITKIND_SIGNALLED)
+ mourn_inferior (find_process_pid (ptid_get_pid (last_ptid)));
+ }
+}
+
+/* Callback for for_each_inferior. Make a new stop reply for each
+ stopped thread. */
+
+static int
+queue_stop_reply_callback (struct inferior_list_entry *entry, void *arg)
+{
+ struct thread_info *thread = (struct thread_info *) entry;
+
+ /* For now, assume targets that don't have this callback also don't
+ manage the thread's last_status field. */
+ if (the_target->thread_stopped == NULL)
+ {
+ /* Pass the last stop reply back to GDB, but don't notify
+ yet. */
+ queue_stop_reply (entry->id, &thread->last_status);
+ }
+ else
+ {
+ if (thread_stopped (thread))
+ {
+ if (debug_threads)
+ fprintf (stderr,
+ "Reporting thread %s as already stopped with %s\n",
+ target_pid_to_str (entry->id),
+ target_waitstatus_to_string (&thread->last_status));
+
+ gdb_assert (thread->last_status.kind != TARGET_WAITKIND_IGNORE);
+
+ /* Pass the last stop reply back to GDB, but don't notify
+ yet. */
+ queue_stop_reply (entry->id, &thread->last_status);
+ }
+ }
+
+ return 0;
+}
+
+/* Set this inferior threads's state as "want-stopped". We won't
+ resume this thread until the client gives us another action for
+ it. */
+
+static void
+gdb_wants_thread_stopped (struct inferior_list_entry *entry)
+{
+ struct thread_info *thread = (struct thread_info *) entry;
+
+ thread->last_resume_kind = resume_stop;
+
+ if (thread->last_status.kind == TARGET_WAITKIND_IGNORE)
+ {
+ /* Most threads are stopped implicitly (all-stop); tag that with
+ signal 0. */
+ thread->last_status.kind = TARGET_WAITKIND_STOPPED;
+ thread->last_status.value.sig = TARGET_SIGNAL_0;
+ }
+}
+
+/* Set all threads' states as "want-stopped". */
+
+static void
+gdb_wants_all_threads_stopped (void)
+{
+ for_each_inferior (&all_threads, gdb_wants_thread_stopped);
+}
+
+/* Clear the gdb_detached flag of every process. */
+
+static void
+gdb_reattached_process (struct inferior_list_entry *entry)
+{
+ struct process_info *process = (struct process_info *) entry;
+
+ process->gdb_detached = 0;
}
/* Status handler for the '?' packet. */
static void
handle_status (char *own_buf)
{
- if (all_threads.head)
- prepare_resume_reply (own_buf,
- all_threads.head->id, &last_status);
+ /* GDB is connected, don't forward events to the target anymore. */
+ for_each_inferior (&all_processes, gdb_reattached_process);
+
+ /* In non-stop mode, we must send a stop reply for each stopped
+ thread. In all-stop mode, just send one for the first stopped
+ thread we find. */
+
+ if (non_stop)
+ {
+ discard_queued_stop_replies (-1);
+ find_inferior (&all_threads, queue_stop_reply_callback, NULL);
+
+ /* The first is sent immediatly. OK is sent if there is no
+ stopped thread, which is the same handling of the vStopped
+ packet (by design). */
+ send_next_stop_reply (own_buf);
+ }
else
- strcpy (own_buf, "W00");
+ {
+ pause_all (0);
+ stabilize_threads ();
+ gdb_wants_all_threads_stopped ();
+
+ if (all_threads.head)
+ {
+ struct target_waitstatus status;
+
+ status.kind = TARGET_WAITKIND_STOPPED;
+ status.value.sig = TARGET_SIGNAL_TRAP;
+ prepare_resume_reply (own_buf,
+ all_threads.head->id, &status);
+ }
+ else
+ strcpy (own_buf, "W00");
+ }
}
static void
gdbserver_version (void)
{
printf ("GNU gdbserver %s%s\n"
- "Copyright (C) 2009 Free Software Foundation, Inc.\n"
- "gdbserver is free software, covered by the GNU General Public License.\n"
+ "Copyright (C) 2011 Free Software Foundation, Inc.\n"
+ "gdbserver is free software, covered by the "
+ "GNU General Public License.\n"
"This gdbserver was configured as \"%s\"\n",
PKGVERSION, version, host_name);
}
" vCont \tAll vCont packets\n"
" qC \tQuerying the current thread\n"
" qfThreadInfo\tThread listing\n"
- " Tthread \tPassing the thread specifier in the T stop reply packet\n"
+ " Tthread \tPassing the thread specifier in the "
+ "T stop reply packet\n"
" threads \tAll of the above\n");
}
-#undef require_running
-#define require_running(BUF) \
- if (!target_running ()) \
- { \
- write_enn (BUF); \
- break; \
- }
+#undef require_running
+#define require_running(BUF) \
+ if (!target_running ()) \
+ { \
+ write_enn (BUF); \
+ break; \
+ }
+
+static int
+first_thread_of (struct inferior_list_entry *entry, void *args)
+{
+ int pid = * (int *) args;
+
+ if (ptid_get_pid (entry->id) == pid)
+ return 1;
+
+ return 0;
+}
+
+static void
+kill_inferior_callback (struct inferior_list_entry *entry)
+{
+ struct process_info *process = (struct process_info *) entry;
+ int pid = ptid_get_pid (process->head.id);
+
+ kill_inferior (pid);
+ discard_queued_stop_replies (pid);
+}
+
+/* Callback for for_each_inferior to detach or kill the inferior,
+ depending on whether we attached to it or not.
+ We inform the user whether we're detaching or killing the process
+ as this is only called when gdbserver is about to exit. */
+
+static void
+detach_or_kill_inferior_callback (struct inferior_list_entry *entry)
+{
+ struct process_info *process = (struct process_info *) entry;
+ int pid = ptid_get_pid (process->head.id);
+
+ if (process->attached)
+ detach_inferior (pid);
+ else
+ kill_inferior (pid);
+
+ discard_queued_stop_replies (pid);
+}
+
+/* for_each_inferior callback for detach_or_kill_for_exit to print
+ the pids of started inferiors. */
+
+static void
+print_started_pid (struct inferior_list_entry *entry)
+{
+ struct process_info *process = (struct process_info *) entry;
+
+ if (! process->attached)
+ {
+ int pid = ptid_get_pid (process->head.id);
+ fprintf (stderr, " %d", pid);
+ }
+}
+
+/* for_each_inferior callback for detach_or_kill_for_exit to print
+ the pids of attached inferiors. */
+
+static void
+print_attached_pid (struct inferior_list_entry *entry)
+{
+ struct process_info *process = (struct process_info *) entry;
+
+ if (process->attached)
+ {
+ int pid = ptid_get_pid (process->head.id);
+ fprintf (stderr, " %d", pid);
+ }
+}
+
+/* Call this when exiting gdbserver with possible inferiors that need
+ to be killed or detached from. */
+
+static void
+detach_or_kill_for_exit (void)
+{
+ /* First print a list of the inferiors we will be killing/detaching.
+ This is to assist the user, for example, in case the inferior unexpectedly
+ dies after we exit: did we screw up or did the inferior exit on its own?
+ Having this info will save some head-scratching. */
+
+ if (have_started_inferiors_p ())
+ {
+ fprintf (stderr, "Killing process(es):");
+ for_each_inferior (&all_processes, print_started_pid);
+ fprintf (stderr, "\n");
+ }
+ if (have_attached_inferiors_p ())
+ {
+ fprintf (stderr, "Detaching process(es):");
+ for_each_inferior (&all_processes, print_attached_pid);
+ fprintf (stderr, "\n");
+ }
+
+ /* Now we can kill or detach the inferiors. */
+
+ for_each_inferior (&all_processes, detach_or_kill_inferior_callback);
+}
+
+static void
+join_inferiors_callback (struct inferior_list_entry *entry)
+{
+ struct process_info *process = (struct process_info *) entry;
+
+ /* If we are attached, then we can exit. Otherwise, we need to hang
+ around doing nothing, until the child is gone. */
+ if (!process->attached)
+ join_inferior (ptid_get_pid (process->head.id));
+}
int
main (int argc, char *argv[])
{
- char ch, *own_buf;
- unsigned char *mem_buf;
- int i = 0;
- int signal;
- unsigned int len;
- CORE_ADDR mem_addr;
int bad_attach;
int pid;
char *arg_end, *port;
exit (1);
}
+ initialize_inferiors ();
initialize_async_io ();
initialize_low ();
+ if (target_supports_tracepoints ())
+ initialize_tracepoint ();
own_buf = xmalloc (PBUFSIZ + 1);
mem_buf = xmalloc (PBUFSIZ);
{
last_status.kind = TARGET_WAITKIND_EXITED;
last_status.value.integer = 0;
- last_ptid = -1;
+ last_ptid = minus_one_ptid;
}
/* Don't report shared library events on the initial connection,
if (setjmp (toplevel))
{
- fprintf (stderr, "Killing inferior\n");
- kill_inferior ();
+ detach_or_kill_for_exit ();
exit (1);
}
while (1)
{
noack_mode = 0;
+ multi_process = 0;
+ /* Be sure we're out of tfind mode. */
+ current_traceframe = -1;
+
remote_open (port);
- restart:
if (setjmp (toplevel) != 0)
{
/* An error occurred. */
}
}
- disable_async_io ();
- while (!exit_requested)
+ /* Wait for events. This will return when all event sources are
+ removed from the event loop. */
+ start_event_loop ();
+
+ /* If an exit was requested (using the "monitor exit" command),
+ terminate now. The only other way to get here is for
+ getpkt to fail; close the connection and reopen it at the
+ top of the loop. */
+
+ if (exit_requested)
{
- unsigned char sig;
- int packet_len;
- int new_packet_len = -1;
+ detach_or_kill_for_exit ();
+ exit (0);
+ }
- response_needed = 0;
- packet_len = getpkt (own_buf);
- if (packet_len <= 0)
- break;
- response_needed = 1;
+ fprintf (stderr,
+ "Remote side has terminated connection. "
+ "GDBserver will reopen the connection.\n");
- i = 0;
- ch = own_buf[i++];
- switch (ch)
+ if (tracing)
+ {
+ if (disconnected_tracing)
{
- case 'q':
- handle_query (own_buf, packet_len, &new_packet_len);
- break;
- case 'Q':
- handle_general_set (own_buf);
- break;
- case 'D':
- require_running (own_buf);
- fprintf (stderr, "Detaching from inferior\n");
- if (detach_inferior () != 0)
- write_enn (own_buf);
- else
- {
- write_ok (own_buf);
-
- if (extended_protocol)
- {
- /* Treat this like a normal program exit. */
- last_status.kind = TARGET_WAITKIND_EXITED;
- last_status.value.integer = 0;
- last_ptid = signal_pid;
- }
- else
- {
- putpkt (own_buf);
- remote_close ();
-
- /* If we are attached, then we can exit. Otherwise, we
- need to hang around doing nothing, until the child
- is gone. */
- if (!attached)
- join_inferior ();
-
- exit (0);
- }
- }
- break;
- case '!':
- extended_protocol = 1;
- write_ok (own_buf);
- break;
- case '?':
- handle_status (own_buf);
- break;
- case 'H':
- if (own_buf[1] == 'c' || own_buf[1] == 'g' || own_buf[1] == 's')
+ /* Try to enable non-stop/async mode, so we we can both
+ wait for an async socket accept, and handle async
+ target events simultaneously. There's also no point
+ either in having the target always stop all threads,
+ when we're going to pass signals down without
+ informing GDB. */
+ if (!non_stop)
{
- unsigned long gdb_id, thread_id;
-
- require_running (own_buf);
- gdb_id = strtoul (&own_buf[2], NULL, 16);
- if (gdb_id == 0 || gdb_id == -1)
- thread_id = gdb_id;
- else
- {
- thread_id = gdb_id_to_thread_id (gdb_id);
- if (thread_id == 0)
- {
- write_enn (own_buf);
- break;
- }
- }
-
- if (own_buf[1] == 'g')
- {
- general_thread = thread_id;
- set_desired_inferior (1);
- }
- else if (own_buf[1] == 'c')
- cont_thread = thread_id;
- else if (own_buf[1] == 's')
- step_thread = thread_id;
-
- write_ok (own_buf);
- }
- else
- {
- /* Silently ignore it so that gdb can extend the protocol
- without compatibility headaches. */
- own_buf[0] = '\0';
+ if (start_non_stop (1))
+ non_stop = 1;
+
+ /* Detaching implicitly resumes all threads; simply
+ disconnecting does not. */
}
+ }
+ else
+ {
+ fprintf (stderr,
+ "Disconnected tracing disabled; stopping trace run.\n");
+ stop_tracing ();
+ }
+ }
+ }
+}
+
+/* Event loop callback that handles a serial event. The first byte in
+ the serial buffer gets us here. We expect characters to arrive at
+ a brisk pace, so we read the rest of the packet with a blocking
+ getpkt call. */
+
+static int
+process_serial_event (void)
+{
+ char ch;
+ int i = 0;
+ int signal;
+ unsigned int len;
+ CORE_ADDR mem_addr;
+ int pid;
+ unsigned char sig;
+ int packet_len;
+ int new_packet_len = -1;
+
+ /* Used to decide when gdbserver should exit in
+ multi-mode/remote. */
+ static int have_ran = 0;
+
+ if (!have_ran)
+ have_ran = target_running ();
+
+ disable_async_io ();
+
+ response_needed = 0;
+ packet_len = getpkt (own_buf);
+ if (packet_len <= 0)
+ {
+ remote_close ();
+ /* Force an event loop break. */
+ return -1;
+ }
+ response_needed = 1;
+
+ i = 0;
+ ch = own_buf[i++];
+ switch (ch)
+ {
+ case 'q':
+ handle_query (own_buf, packet_len, &new_packet_len);
+ break;
+ case 'Q':
+ handle_general_set (own_buf);
+ break;
+ case 'D':
+ require_running (own_buf);
+
+ if (multi_process)
+ {
+ i++; /* skip ';' */
+ pid = strtol (&own_buf[i], NULL, 16);
+ }
+ else
+ pid =
+ ptid_get_pid (((struct inferior_list_entry *) current_inferior)->id);
+
+ if (tracing && disconnected_tracing)
+ {
+ struct thread_resume resume_info;
+ struct process_info *process = find_process_pid (pid);
+
+ if (process == NULL)
+ {
+ write_enn (own_buf);
break;
- case 'g':
- require_running (own_buf);
- set_desired_inferior (1);
- registers_to_string (own_buf);
- break;
- case 'G':
- require_running (own_buf);
- set_desired_inferior (1);
- registers_from_string (&own_buf[1]);
- write_ok (own_buf);
- break;
- case 'm':
- require_running (own_buf);
- decode_m_packet (&own_buf[1], &mem_addr, &len);
- if (read_inferior_memory (mem_addr, mem_buf, len) == 0)
- convert_int_to_ascii (mem_buf, own_buf, len);
- else
- write_enn (own_buf);
- break;
- case 'M':
- require_running (own_buf);
- decode_M_packet (&own_buf[1], &mem_addr, &len, mem_buf);
- if (write_inferior_memory (mem_addr, mem_buf, len) == 0)
- write_ok (own_buf);
- else
- write_enn (own_buf);
- break;
- case 'X':
- require_running (own_buf);
- if (decode_X_packet (&own_buf[1], packet_len - 1,
- &mem_addr, &len, mem_buf) < 0
- || write_inferior_memory (mem_addr, mem_buf, len) != 0)
- write_enn (own_buf);
- else
- write_ok (own_buf);
- break;
- case 'C':
- require_running (own_buf);
- convert_ascii_to_int (own_buf + 1, &sig, 1);
- if (target_signal_to_host_p (sig))
- signal = target_signal_to_host (sig);
- else
- signal = 0;
- myresume (own_buf, 0, signal);
- break;
- case 'S':
- require_running (own_buf);
- convert_ascii_to_int (own_buf + 1, &sig, 1);
- if (target_signal_to_host_p (sig))
- signal = target_signal_to_host (sig);
- else
- signal = 0;
- myresume (own_buf, 1, signal);
- break;
- case 'c':
- require_running (own_buf);
- signal = 0;
- myresume (own_buf, 0, signal);
- break;
- case 's':
- require_running (own_buf);
- signal = 0;
- myresume (own_buf, 1, signal);
- break;
- case 'Z':
- {
- char *lenptr;
- char *dataptr;
- CORE_ADDR addr = strtoul (&own_buf[3], &lenptr, 16);
- int len = strtol (lenptr + 1, &dataptr, 16);
- char type = own_buf[1];
-
- if (the_target->insert_watchpoint == NULL
- || (type < '2' || type > '4'))
- {
- /* No watchpoint support or not a watchpoint command;
- unrecognized either way. */
- own_buf[0] = '\0';
- }
- else
- {
- int res;
-
- require_running (own_buf);
- res = (*the_target->insert_watchpoint) (type, addr, len);
- if (res == 0)
- write_ok (own_buf);
- else if (res == 1)
- /* Unsupported. */
- own_buf[0] = '\0';
- else
- write_enn (own_buf);
- }
- break;
- }
- case 'z':
- {
- char *lenptr;
- char *dataptr;
- CORE_ADDR addr = strtoul (&own_buf[3], &lenptr, 16);
- int len = strtol (lenptr + 1, &dataptr, 16);
- char type = own_buf[1];
-
- if (the_target->remove_watchpoint == NULL
- || (type < '2' || type > '4'))
- {
- /* No watchpoint support or not a watchpoint command;
- unrecognized either way. */
- own_buf[0] = '\0';
- }
- else
- {
- int res;
-
- require_running (own_buf);
- res = (*the_target->remove_watchpoint) (type, addr, len);
- if (res == 0)
- write_ok (own_buf);
- else if (res == 1)
- /* Unsupported. */
- own_buf[0] = '\0';
- else
- write_enn (own_buf);
- }
- break;
- }
- case 'k':
- response_needed = 0;
- if (!target_running ())
- /* The packet we received doesn't make sense - but we
- can't reply to it, either. */
- goto restart;
-
- fprintf (stderr, "Killing inferior\n");
- kill_inferior ();
-
- /* When using the extended protocol, we wait with no
- program running. The traditional protocol will exit
- instead. */
- if (extended_protocol)
- {
- last_status.kind = TARGET_WAITKIND_EXITED;
- last_status.value.sig = TARGET_SIGNAL_KILL;
- was_running = 0;
- goto restart;
- }
- else
+ }
+
+ fprintf (stderr,
+ "Disconnected tracing in effect, "
+ "leaving gdbserver attached to the process\n");
+
+ /* Make sure we're in non-stop/async mode, so we we can both
+ wait for an async socket accept, and handle async target
+ events simultaneously. There's also no point either in
+ having the target stop all threads, when we're going to
+ pass signals down without informing GDB. */
+ if (!non_stop)
+ {
+ if (debug_threads)
+ fprintf (stderr, "Forcing non-stop mode\n");
+
+ non_stop = 1;
+ start_non_stop (1);
+ }
+
+ process->gdb_detached = 1;
+
+ /* Detaching implicitly resumes all threads. */
+ resume_info.thread = minus_one_ptid;
+ resume_info.kind = resume_continue;
+ resume_info.sig = 0;
+ (*the_target->resume) (&resume_info, 1);
+
+ write_ok (own_buf);
+ break; /* from switch/case */
+ }
+
+ fprintf (stderr, "Detaching from process %d\n", pid);
+ stop_tracing ();
+ if (detach_inferior (pid) != 0)
+ write_enn (own_buf);
+ else
+ {
+ discard_queued_stop_replies (pid);
+ write_ok (own_buf);
+
+ if (extended_protocol)
+ {
+ /* Treat this like a normal program exit. */
+ last_status.kind = TARGET_WAITKIND_EXITED;
+ last_status.value.integer = 0;
+ last_ptid = pid_to_ptid (pid);
+
+ current_inferior = NULL;
+ }
+ else
+ {
+ putpkt (own_buf);
+ remote_close ();
+
+ /* If we are attached, then we can exit. Otherwise, we
+ need to hang around doing nothing, until the child is
+ gone. */
+ for_each_inferior (&all_processes,
+ join_inferiors_callback);
+ exit (0);
+ }
+ }
+ break;
+ case '!':
+ extended_protocol = 1;
+ write_ok (own_buf);
+ break;
+ case '?':
+ handle_status (own_buf);
+ break;
+ case 'H':
+ if (own_buf[1] == 'c' || own_buf[1] == 'g' || own_buf[1] == 's')
+ {
+ ptid_t gdb_id, thread_id;
+ int pid;
+
+ require_running (own_buf);
+
+ gdb_id = read_ptid (&own_buf[2], NULL);
+
+ pid = ptid_get_pid (gdb_id);
+
+ if (ptid_equal (gdb_id, null_ptid)
+ || ptid_equal (gdb_id, minus_one_ptid))
+ thread_id = null_ptid;
+ else if (pid != 0
+ && ptid_equal (pid_to_ptid (pid),
+ gdb_id))
+ {
+ struct thread_info *thread =
+ (struct thread_info *) find_inferior (&all_threads,
+ first_thread_of,
+ &pid);
+ if (!thread)
{
- exit (0);
+ write_enn (own_buf);
break;
}
- case 'T':
- {
- unsigned long gdb_id, thread_id;
-
- require_running (own_buf);
- gdb_id = strtoul (&own_buf[1], NULL, 16);
- thread_id = gdb_id_to_thread_id (gdb_id);
- if (thread_id == 0)
- {
- write_enn (own_buf);
- break;
- }
-
- if (mythread_alive (thread_id))
- write_ok (own_buf);
- else
- write_enn (own_buf);
- }
- break;
- case 'R':
- response_needed = 0;
- /* Restarting the inferior is only supported in the
- extended protocol. */
- if (extended_protocol)
+ thread_id = ((struct inferior_list_entry *)thread)->id;
+ }
+ else
+ {
+ thread_id = gdb_id_to_thread_id (gdb_id);
+ if (ptid_equal (thread_id, null_ptid))
{
- if (target_running ())
- kill_inferior ();
- fprintf (stderr, "GDBserver restarting\n");
-
- /* Wait till we are at 1st instruction in prog. */
- if (program_argv != NULL)
- start_inferior (program_argv);
- else
- {
- last_status.kind = TARGET_WAITKIND_EXITED;
- last_status.value.sig = TARGET_SIGNAL_KILL;
- }
- goto restart;
+ write_enn (own_buf);
+ break;
}
- else
+ }
+
+ if (own_buf[1] == 'g')
+ {
+ if (ptid_equal (thread_id, null_ptid))
{
- /* It is a request we don't understand. Respond with an
- empty packet so that gdb knows that we don't support this
- request. */
- own_buf[0] = '\0';
- break;
+ /* GDB is telling us to choose any thread. Check if
+ the currently selected thread is still valid. If
+ it is not, select the first available. */
+ struct thread_info *thread =
+ (struct thread_info *) find_inferior_id (&all_threads,
+ general_thread);
+ if (thread == NULL)
+ thread_id = all_threads.head->id;
}
- case 'v':
- /* Extended (long) request. */
- handle_v_requests (own_buf, packet_len, &new_packet_len);
- break;
- default:
- /* It is a request we don't understand. Respond with an
- empty packet so that gdb knows that we don't support this
- request. */
- own_buf[0] = '\0';
- break;
+ general_thread = thread_id;
+ set_desired_inferior (1);
}
+ else if (own_buf[1] == 'c')
+ cont_thread = thread_id;
+ else if (own_buf[1] == 's')
+ step_thread = thread_id;
+
+ write_ok (own_buf);
+ }
+ else
+ {
+ /* Silently ignore it so that gdb can extend the protocol
+ without compatibility headaches. */
+ own_buf[0] = '\0';
+ }
+ break;
+ case 'g':
+ require_running (own_buf);
+ if (current_traceframe >= 0)
+ {
+ struct regcache *regcache = new_register_cache ();
- if (new_packet_len != -1)
- putpkt_binary (own_buf, new_packet_len);
+ if (fetch_traceframe_registers (current_traceframe,
+ regcache, -1) == 0)
+ registers_to_string (regcache, own_buf);
else
- putpkt (own_buf);
+ write_enn (own_buf);
+ free_register_cache (regcache);
+ }
+ else
+ {
+ struct regcache *regcache;
- response_needed = 0;
+ set_desired_inferior (1);
+ regcache = get_thread_regcache (current_inferior, 1);
+ registers_to_string (regcache, own_buf);
+ }
+ break;
+ case 'G':
+ require_running (own_buf);
+ if (current_traceframe >= 0)
+ write_enn (own_buf);
+ else
+ {
+ struct regcache *regcache;
- if (was_running
- && (last_status.kind == TARGET_WAITKIND_EXITED
- || last_status.kind == TARGET_WAITKIND_SIGNALLED))
- {
- was_running = 0;
+ set_desired_inferior (1);
+ regcache = get_thread_regcache (current_inferior, 1);
+ registers_from_string (regcache, &own_buf[1]);
+ write_ok (own_buf);
+ }
+ break;
+ case 'm':
+ require_running (own_buf);
+ decode_m_packet (&own_buf[1], &mem_addr, &len);
+ if (gdb_read_memory (mem_addr, mem_buf, len) == 0)
+ convert_int_to_ascii (mem_buf, own_buf, len);
+ else
+ write_enn (own_buf);
+ break;
+ case 'M':
+ require_running (own_buf);
+ decode_M_packet (&own_buf[1], &mem_addr, &len, &mem_buf);
+ if (gdb_write_memory (mem_addr, mem_buf, len) == 0)
+ write_ok (own_buf);
+ else
+ write_enn (own_buf);
+ break;
+ case 'X':
+ require_running (own_buf);
+ if (decode_X_packet (&own_buf[1], packet_len - 1,
+ &mem_addr, &len, &mem_buf) < 0
+ || gdb_write_memory (mem_addr, mem_buf, len) != 0)
+ write_enn (own_buf);
+ else
+ write_ok (own_buf);
+ break;
+ case 'C':
+ require_running (own_buf);
+ convert_ascii_to_int (own_buf + 1, &sig, 1);
+ if (target_signal_to_host_p (sig))
+ signal = target_signal_to_host (sig);
+ else
+ signal = 0;
+ myresume (own_buf, 0, signal);
+ break;
+ case 'S':
+ require_running (own_buf);
+ convert_ascii_to_int (own_buf + 1, &sig, 1);
+ if (target_signal_to_host_p (sig))
+ signal = target_signal_to_host (sig);
+ else
+ signal = 0;
+ myresume (own_buf, 1, signal);
+ break;
+ case 'c':
+ require_running (own_buf);
+ signal = 0;
+ myresume (own_buf, 0, signal);
+ break;
+ case 's':
+ require_running (own_buf);
+ signal = 0;
+ myresume (own_buf, 1, signal);
+ break;
+ case 'Z': /* insert_ ... */
+ /* Fallthrough. */
+ case 'z': /* remove_ ... */
+ {
+ char *lenptr;
+ char *dataptr;
+ CORE_ADDR addr = strtoul (&own_buf[3], &lenptr, 16);
+ int len = strtol (lenptr + 1, &dataptr, 16);
+ char type = own_buf[1];
+ int res;
+ const int insert = ch == 'Z';
+
+ /* Default to unrecognized/unsupported. */
+ res = 1;
+ switch (type)
+ {
+ case '0': /* software-breakpoint */
+ case '1': /* hardware-breakpoint */
+ case '2': /* write watchpoint */
+ case '3': /* read watchpoint */
+ case '4': /* access watchpoint */
+ require_running (own_buf);
+ if (insert && the_target->insert_point != NULL)
+ res = (*the_target->insert_point) (type, addr, len);
+ else if (!insert && the_target->remove_point != NULL)
+ res = (*the_target->remove_point) (type, addr, len);
+ break;
+ default:
+ break;
+ }
+
+ if (res == 0)
+ write_ok (own_buf);
+ else if (res == 1)
+ /* Unsupported. */
+ own_buf[0] = '\0';
+ else
+ write_enn (own_buf);
+ break;
+ }
+ case 'k':
+ response_needed = 0;
+ if (!target_running ())
+ /* The packet we received doesn't make sense - but we can't
+ reply to it, either. */
+ return 0;
+
+ fprintf (stderr, "Killing all inferiors\n");
+ for_each_inferior (&all_processes, kill_inferior_callback);
+
+ /* When using the extended protocol, we wait with no program
+ running. The traditional protocol will exit instead. */
+ if (extended_protocol)
+ {
+ last_status.kind = TARGET_WAITKIND_EXITED;
+ last_status.value.sig = TARGET_SIGNAL_KILL;
+ return 0;
+ }
+ else
+ exit (0);
- if (last_status.kind == TARGET_WAITKIND_EXITED)
- fprintf (stderr,
- "\nChild exited with status %d\n",
- last_status.value.integer);
- else if (last_status.kind == TARGET_WAITKIND_SIGNALLED)
- fprintf (stderr, "\nChild terminated with signal = 0x%x (%s)\n",
- target_signal_to_host (last_status.value.sig),
- target_signal_to_name (last_status.value.sig));
-
- if (extended_protocol)
- goto restart;
- else
- {
- fprintf (stderr, "GDBserver exiting\n");
- remote_close ();
- exit (0);
- }
- }
+ case 'T':
+ {
+ ptid_t gdb_id, thread_id;
- if (last_status.kind != TARGET_WAITKIND_EXITED
- && last_status.kind != TARGET_WAITKIND_SIGNALLED)
- was_running = 1;
+ require_running (own_buf);
+
+ gdb_id = read_ptid (&own_buf[1], NULL);
+ thread_id = gdb_id_to_thread_id (gdb_id);
+ if (ptid_equal (thread_id, null_ptid))
+ {
+ write_enn (own_buf);
+ break;
+ }
+
+ if (mythread_alive (thread_id))
+ write_ok (own_buf);
+ else
+ write_enn (own_buf);
+ }
+ break;
+ case 'R':
+ response_needed = 0;
+
+ /* Restarting the inferior is only supported in the extended
+ protocol. */
+ if (extended_protocol)
+ {
+ if (target_running ())
+ for_each_inferior (&all_processes,
+ kill_inferior_callback);
+ fprintf (stderr, "GDBserver restarting\n");
+
+ /* Wait till we are at 1st instruction in prog. */
+ if (program_argv != NULL)
+ start_inferior (program_argv);
+ else
+ {
+ last_status.kind = TARGET_WAITKIND_EXITED;
+ last_status.value.sig = TARGET_SIGNAL_KILL;
+ }
+ return 0;
+ }
+ else
+ {
+ /* It is a request we don't understand. Respond with an
+ empty packet so that gdb knows that we don't support this
+ request. */
+ own_buf[0] = '\0';
+ break;
}
+ case 'v':
+ /* Extended (long) request. */
+ handle_v_requests (own_buf, packet_len, &new_packet_len);
+ break;
+
+ default:
+ /* It is a request we don't understand. Respond with an empty
+ packet so that gdb knows that we don't support this
+ request. */
+ own_buf[0] = '\0';
+ break;
+ }
- /* If an exit was requested (using the "monitor exit" command),
- terminate now. The only other way to get here is for
- getpkt to fail; close the connection and reopen it at the
- top of the loop. */
+ if (new_packet_len != -1)
+ putpkt_binary (own_buf, new_packet_len);
+ else
+ putpkt (own_buf);
- if (exit_requested)
+ response_needed = 0;
+
+ if (!extended_protocol && have_ran && !target_running ())
+ {
+ /* In non-stop, defer exiting until GDB had a chance to query
+ the whole vStopped list (until it gets an OK). */
+ if (!notif_queue)
{
+ fprintf (stderr, "GDBserver exiting\n");
remote_close ();
- if (attached && target_running ())
- detach_inferior ();
- else if (target_running ())
- kill_inferior ();
exit (0);
}
+ }
+
+ if (exit_requested)
+ return -1;
+
+ return 0;
+}
+
+/* Event-loop callback for serial events. */
+
+int
+handle_serial_event (int err, gdb_client_data client_data)
+{
+ if (debug_threads)
+ fprintf (stderr, "handling possible serial event\n");
+
+ /* Really handle it. */
+ if (process_serial_event () < 0)
+ return -1;
+
+ /* Be sure to not change the selected inferior behind GDB's back.
+ Important in the non-stop mode asynchronous protocol. */
+ set_desired_inferior (1);
+
+ return 0;
+}
+
+/* Event-loop callback for target events. */
+
+int
+handle_target_event (int err, gdb_client_data client_data)
+{
+ if (debug_threads)
+ fprintf (stderr, "handling possible target event\n");
+
+ last_ptid = mywait (minus_one_ptid, &last_status,
+ TARGET_WNOHANG, 1);
+
+ if (last_status.kind != TARGET_WAITKIND_IGNORE)
+ {
+ int pid = ptid_get_pid (last_ptid);
+ struct process_info *process = find_process_pid (pid);
+ int forward_event = !gdb_connected () || process->gdb_detached;
+
+ if (last_status.kind == TARGET_WAITKIND_EXITED
+ || last_status.kind == TARGET_WAITKIND_SIGNALLED)
+ {
+ mark_breakpoints_out (process);
+ mourn_inferior (process);
+ }
else
{
- fprintf (stderr, "Remote side has terminated connection. "
- "GDBserver will reopen the connection.\n");
- remote_close ();
+ /* We're reporting this thread as stopped. Update its
+ "want-stopped" state to what the client wants, until it
+ gets a new resume action. */
+ current_inferior->last_resume_kind = resume_stop;
+ current_inferior->last_status = last_status;
+ }
+
+ if (forward_event)
+ {
+ if (!target_running ())
+ {
+ /* The last process exited. We're done. */
+ exit (0);
+ }
+
+ if (last_status.kind == TARGET_WAITKIND_STOPPED)
+ {
+ /* A thread stopped with a signal, but gdb isn't
+ connected to handle it. Pass it down to the
+ inferior, as if it wasn't being traced. */
+ struct thread_resume resume_info;
+
+ if (debug_threads)
+ fprintf (stderr,
+ "GDB not connected; forwarding event %d for [%s]\n",
+ (int) last_status.kind,
+ target_pid_to_str (last_ptid));
+
+ resume_info.thread = last_ptid;
+ resume_info.kind = resume_continue;
+ resume_info.sig = target_signal_to_host (last_status.value.sig);
+ (*the_target->resume) (&resume_info, 1);
+ }
+ else if (debug_threads)
+ fprintf (stderr, "GDB not connected; ignoring event %d for [%s]\n",
+ (int) last_status.kind,
+ target_pid_to_str (last_ptid));
+ }
+ else
+ {
+ /* Something interesting. Tell GDB about it. */
+ push_event (last_ptid, &last_status);
}
}
+
+ /* Be sure to not change the selected inferior behind GDB's back.
+ Important in the non-stop mode asynchronous protocol. */
+ set_desired_inferior (1);
+
+ return 0;
}
projects / deliverable / binutils-gdb.git / blobdiff