mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-09 04:21:49 +08:00
33b5899fc0
Fix a few typos: - implemention -> implementation - convertion(s) -> conversion(s) - backlashes -> backslashes - signoring -> ignoring - (un)ambigious -> (un)ambiguous - occured -> occurred - hidding -> hiding - temporarilly -> temporarily - immediatelly -> immediately - sillyness -> silliness - similiar -> similar - porkuser -> pokeuser - thats -> that - alway -> always - supercede -> supersede - accomodate -> accommodate - aquire -> acquire - priveleged -> privileged - priviliged -> privileged - priviledges -> privileges - privilige -> privilege - recieve -> receive - (p)refered -> (p)referred - succesfully -> successfully - successfuly -> successfully - responsability -> responsibility - wether -> whether - wich -> which - disasbleable -> disableable - descriminant -> discriminant - construcstor -> constructor - underlaying -> underlying - underyling -> underlying - structureal -> structural - appearences -> appearances - terciarily -> tertiarily - resgisters -> registers - reacheable -> reachable - likelyhood -> likelihood - intepreter -> interpreter - disassemly -> disassembly - covnersion -> conversion - conviently -> conveniently - atttribute -> attribute - struction -> struct - resonable -> reasonable - popupated -> populated - namespaxe -> namespace - intialize -> initialize - identifer(s) -> identifier(s) - expection -> exception - exectuted -> executed - dungerous -> dangerous - dissapear -> disappear - completly -> completely - (inter)changable -> (inter)changeable - beakpoint -> breakpoint - automativ -> automatic - alocating -> allocating - agressive -> aggressive - writting -> writing - reguires -> requires - registed -> registered - recuding -> reducing - opeartor -> operator - ommitted -> omitted - modifing -> modifying - intances -> instances - imbedded -> embedded - gdbaarch -> gdbarch - exection -> execution - direcive -> directive - demanged -> demangled - decidely -> decidedly - argments -> arguments - agrument -> argument - amespace -> namespace - targtet -> target - supress(ed) -> suppress(ed) - startum -> stratum - squence -> sequence - prompty -> prompt - overlow -> overflow - memember -> member - languge -> language - geneate -> generate - funcion -> function - exising -> existing - dinking -> syncing - destroh -> destroy - clenaed -> cleaned - changep -> changedp (name of variable) - arround -> around - aproach -> approach - whould -> would - symobl -> symbol - recuse -> recurse - outter -> outer - freeds -> frees - contex -> context Tested on x86_64-linux. Reviewed-By: Tom Tromey <tom@tromey.com>
4645 lines
115 KiB
C++
4645 lines
115 KiB
C++
/* Main code for remote server for GDB.
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Copyright (C) 1989-2023 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "server.h"
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#include "gdbthread.h"
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#include "gdbsupport/agent.h"
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#include "notif.h"
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#include "tdesc.h"
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#include "gdbsupport/rsp-low.h"
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#include "gdbsupport/signals-state-save-restore.h"
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#include <ctype.h>
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#include <unistd.h>
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#if HAVE_SIGNAL_H
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#include <signal.h>
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#endif
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#include "gdbsupport/gdb_vecs.h"
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#include "gdbsupport/gdb_wait.h"
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#include "gdbsupport/btrace-common.h"
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#include "gdbsupport/filestuff.h"
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#include "tracepoint.h"
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#include "dll.h"
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#include "hostio.h"
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#include <vector>
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#include "gdbsupport/common-inferior.h"
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#include "gdbsupport/job-control.h"
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#include "gdbsupport/environ.h"
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#include "filenames.h"
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#include "gdbsupport/pathstuff.h"
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#ifdef USE_XML
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#include "xml-builtin.h"
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#endif
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#include "gdbsupport/selftest.h"
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#include "gdbsupport/scope-exit.h"
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#include "gdbsupport/gdb_select.h"
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#include "gdbsupport/scoped_restore.h"
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#include "gdbsupport/search.h"
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/* PBUFSIZ must also be at least as big as IPA_CMD_BUF_SIZE, because
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the client state data is passed directly to some agent
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functions. */
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gdb_static_assert (PBUFSIZ >= IPA_CMD_BUF_SIZE);
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#define require_running_or_return(BUF) \
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if (!target_running ()) \
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{ \
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write_enn (BUF); \
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return; \
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}
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#define require_running_or_break(BUF) \
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if (!target_running ()) \
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{ \
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write_enn (BUF); \
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break; \
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}
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/* The environment to pass to the inferior when creating it. */
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static gdb_environ our_environ;
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bool server_waiting;
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static bool extended_protocol;
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static bool response_needed;
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static bool exit_requested;
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/* --once: Exit after the first connection has closed. */
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bool run_once;
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/* Whether to report TARGET_WAITKIND_NO_RESUMED events. */
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static bool report_no_resumed;
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/* The event loop checks this to decide whether to continue accepting
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events. */
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static bool keep_processing_events = true;
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bool non_stop;
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static struct {
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/* Set the PROGRAM_PATH. Here we adjust the path of the provided
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binary if needed. */
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void set (const char *path)
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{
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m_path = path;
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/* Make sure we're using the absolute path of the inferior when
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creating it. */
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if (!contains_dir_separator (m_path.c_str ()))
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{
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int reg_file_errno;
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/* Check if the file is in our CWD. If it is, then we prefix
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its name with CURRENT_DIRECTORY. Otherwise, we leave the
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name as-is because we'll try searching for it in $PATH. */
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if (is_regular_file (m_path.c_str (), ®_file_errno))
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m_path = gdb_abspath (m_path.c_str ());
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}
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}
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/* Return the PROGRAM_PATH. */
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const char *get ()
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{ return m_path.empty () ? nullptr : m_path.c_str (); }
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private:
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/* The program name, adjusted if needed. */
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std::string m_path;
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} program_path;
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static std::vector<char *> program_args;
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static std::string wrapper_argv;
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/* The PID of the originally created or attached inferior. Used to
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send signals to the process when GDB sends us an asynchronous interrupt
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(user hitting Control-C in the client), and to wait for the child to exit
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when no longer debugging it. */
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unsigned long signal_pid;
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/* Set if you want to disable optional thread related packets support
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in gdbserver, for the sake of testing GDB against stubs that don't
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support them. */
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bool disable_packet_vCont;
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bool disable_packet_Tthread;
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bool disable_packet_qC;
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bool disable_packet_qfThreadInfo;
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bool disable_packet_T;
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static unsigned char *mem_buf;
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/* A sub-class of 'struct notif_event' for stop, holding information
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relative to a single stop reply. We keep a queue of these to
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push to GDB in non-stop mode. */
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struct vstop_notif : public notif_event
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{
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/* Thread or process that got the event. */
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ptid_t ptid;
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/* Event info. */
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struct target_waitstatus status;
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};
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/* The current btrace configuration. This is gdbserver's mirror of GDB's
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btrace configuration. */
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static struct btrace_config current_btrace_conf;
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/* The client remote protocol state. */
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static client_state g_client_state;
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client_state &
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get_client_state ()
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{
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client_state &cs = g_client_state;
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return cs;
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}
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/* Put a stop reply to the stop reply queue. */
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static void
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queue_stop_reply (ptid_t ptid, const target_waitstatus &status)
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{
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struct vstop_notif *new_notif = new struct vstop_notif;
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new_notif->ptid = ptid;
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new_notif->status = status;
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notif_event_enque (¬if_stop, new_notif);
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}
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static bool
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remove_all_on_match_ptid (struct notif_event *event, ptid_t filter_ptid)
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{
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struct vstop_notif *vstop_event = (struct vstop_notif *) event;
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return vstop_event->ptid.matches (filter_ptid);
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}
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/* See server.h. */
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void
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discard_queued_stop_replies (ptid_t ptid)
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{
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std::list<notif_event *>::iterator iter, next, end;
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end = notif_stop.queue.end ();
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for (iter = notif_stop.queue.begin (); iter != end; iter = next)
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{
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next = iter;
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++next;
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if (iter == notif_stop.queue.begin ())
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{
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/* The head of the list contains the notification that was
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already sent to GDB. So we can't remove it, otherwise
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when GDB sends the vStopped, it would ack the _next_
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notification, which hadn't been sent yet! */
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continue;
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}
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if (remove_all_on_match_ptid (*iter, ptid))
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{
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delete *iter;
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notif_stop.queue.erase (iter);
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}
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}
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}
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static void
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vstop_notif_reply (struct notif_event *event, char *own_buf)
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{
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struct vstop_notif *vstop = (struct vstop_notif *) event;
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prepare_resume_reply (own_buf, vstop->ptid, vstop->status);
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}
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/* Helper for in_queued_stop_replies. */
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static bool
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in_queued_stop_replies_ptid (struct notif_event *event, ptid_t filter_ptid)
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{
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struct vstop_notif *vstop_event = (struct vstop_notif *) event;
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if (vstop_event->ptid.matches (filter_ptid))
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return true;
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/* Don't resume fork children that GDB does not know about yet. */
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if ((vstop_event->status.kind () == TARGET_WAITKIND_FORKED
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|| vstop_event->status.kind () == TARGET_WAITKIND_VFORKED)
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&& vstop_event->status.child_ptid ().matches (filter_ptid))
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return true;
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return false;
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}
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/* See server.h. */
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int
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in_queued_stop_replies (ptid_t ptid)
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{
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for (notif_event *event : notif_stop.queue)
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{
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if (in_queued_stop_replies_ptid (event, ptid))
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return true;
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}
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return false;
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}
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struct notif_server notif_stop =
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{
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"vStopped", "Stop", {}, vstop_notif_reply,
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};
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static int
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target_running (void)
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{
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return get_first_thread () != NULL;
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}
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/* See gdbsupport/common-inferior.h. */
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const char *
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get_exec_wrapper ()
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{
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return !wrapper_argv.empty () ? wrapper_argv.c_str () : NULL;
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}
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/* See gdbsupport/common-inferior.h. */
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const char *
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get_exec_file (int err)
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{
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if (err && program_path.get () == NULL)
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error (_("No executable file specified."));
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return program_path.get ();
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}
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/* See server.h. */
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gdb_environ *
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get_environ ()
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{
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return &our_environ;
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}
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static int
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attach_inferior (int pid)
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{
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client_state &cs = get_client_state ();
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/* myattach should return -1 if attaching is unsupported,
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0 if it succeeded, and call error() otherwise. */
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if (find_process_pid (pid) != nullptr)
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error ("Already attached to process %d\n", pid);
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if (myattach (pid) != 0)
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return -1;
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fprintf (stderr, "Attached; pid = %d\n", pid);
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fflush (stderr);
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/* FIXME - It may be that we should get the SIGNAL_PID from the
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attach function, so that it can be the main thread instead of
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whichever we were told to attach to. */
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signal_pid = pid;
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if (!non_stop)
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{
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cs.last_ptid = mywait (ptid_t (pid), &cs.last_status, 0, 0);
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/* GDB knows to ignore the first SIGSTOP after attaching to a running
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process using the "attach" command, but this is different; it's
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just using "target remote". Pretend it's just starting up. */
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if (cs.last_status.kind () == TARGET_WAITKIND_STOPPED
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&& cs.last_status.sig () == GDB_SIGNAL_STOP)
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cs.last_status.set_stopped (GDB_SIGNAL_TRAP);
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current_thread->last_resume_kind = resume_stop;
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current_thread->last_status = cs.last_status;
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}
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return 0;
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}
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/* Decode a qXfer read request. Return 0 if everything looks OK,
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or -1 otherwise. */
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static int
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decode_xfer_read (char *buf, CORE_ADDR *ofs, unsigned int *len)
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{
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/* After the read marker and annex, qXfer looks like a
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traditional 'm' packet. */
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decode_m_packet (buf, ofs, len);
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return 0;
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}
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static int
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decode_xfer (char *buf, char **object, char **rw, char **annex, char **offset)
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{
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/* Extract and NUL-terminate the object. */
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*object = buf;
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while (*buf && *buf != ':')
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buf++;
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if (*buf == '\0')
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return -1;
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*buf++ = 0;
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/* Extract and NUL-terminate the read/write action. */
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*rw = buf;
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while (*buf && *buf != ':')
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buf++;
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if (*buf == '\0')
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return -1;
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*buf++ = 0;
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/* Extract and NUL-terminate the annex. */
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*annex = buf;
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while (*buf && *buf != ':')
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buf++;
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if (*buf == '\0')
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return -1;
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*buf++ = 0;
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*offset = buf;
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return 0;
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}
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/* Write the response to a successful qXfer read. Returns the
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length of the (binary) data stored in BUF, corresponding
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to as much of DATA/LEN as we could fit. IS_MORE controls
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the first character of the response. */
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static int
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write_qxfer_response (char *buf, const gdb_byte *data, int len, int is_more)
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{
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int out_len;
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if (is_more)
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buf[0] = 'm';
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else
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buf[0] = 'l';
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return remote_escape_output (data, len, 1, (unsigned char *) buf + 1,
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&out_len, PBUFSIZ - 2) + 1;
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}
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/* Handle btrace enabling in BTS format. */
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static void
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handle_btrace_enable_bts (struct thread_info *thread)
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{
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if (thread->btrace != NULL)
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error (_("Btrace already enabled."));
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current_btrace_conf.format = BTRACE_FORMAT_BTS;
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thread->btrace = target_enable_btrace (thread, ¤t_btrace_conf);
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}
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/* Handle btrace enabling in Intel Processor Trace format. */
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static void
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handle_btrace_enable_pt (struct thread_info *thread)
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{
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if (thread->btrace != NULL)
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error (_("Btrace already enabled."));
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current_btrace_conf.format = BTRACE_FORMAT_PT;
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thread->btrace = target_enable_btrace (thread, ¤t_btrace_conf);
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}
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/* Handle btrace disabling. */
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static void
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handle_btrace_disable (struct thread_info *thread)
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{
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if (thread->btrace == NULL)
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error (_("Branch tracing not enabled."));
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if (target_disable_btrace (thread->btrace) != 0)
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error (_("Could not disable branch tracing."));
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thread->btrace = NULL;
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}
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/* Handle the "Qbtrace" packet. */
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static int
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handle_btrace_general_set (char *own_buf)
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{
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client_state &cs = get_client_state ();
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struct thread_info *thread;
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char *op;
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if (!startswith (own_buf, "Qbtrace:"))
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return 0;
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op = own_buf + strlen ("Qbtrace:");
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|
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if (cs.general_thread == null_ptid
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|| cs.general_thread == minus_one_ptid)
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{
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strcpy (own_buf, "E.Must select a single thread.");
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return -1;
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}
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thread = find_thread_ptid (cs.general_thread);
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|
if (thread == NULL)
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{
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strcpy (own_buf, "E.No such thread.");
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return -1;
|
|
}
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|
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try
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{
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if (strcmp (op, "bts") == 0)
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handle_btrace_enable_bts (thread);
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else if (strcmp (op, "pt") == 0)
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handle_btrace_enable_pt (thread);
|
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else if (strcmp (op, "off") == 0)
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handle_btrace_disable (thread);
|
|
else
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error (_("Bad Qbtrace operation. Use bts, pt, or off."));
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|
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write_ok (own_buf);
|
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}
|
|
catch (const gdb_exception_error &exception)
|
|
{
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sprintf (own_buf, "E.%s", exception.what ());
|
|
}
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|
|
return 1;
|
|
}
|
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|
|
/* Handle the "Qbtrace-conf" packet. */
|
|
|
|
static int
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|
handle_btrace_conf_general_set (char *own_buf)
|
|
{
|
|
client_state &cs = get_client_state ();
|
|
struct thread_info *thread;
|
|
char *op;
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|
|
if (!startswith (own_buf, "Qbtrace-conf:"))
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|
return 0;
|
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|
|
op = own_buf + strlen ("Qbtrace-conf:");
|
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|
|
if (cs.general_thread == null_ptid
|
|
|| cs.general_thread == minus_one_ptid)
|
|
{
|
|
strcpy (own_buf, "E.Must select a single thread.");
|
|
return -1;
|
|
}
|
|
|
|
thread = find_thread_ptid (cs.general_thread);
|
|
if (thread == NULL)
|
|
{
|
|
strcpy (own_buf, "E.No such thread.");
|
|
return -1;
|
|
}
|
|
|
|
if (startswith (op, "bts:size="))
|
|
{
|
|
unsigned long size;
|
|
char *endp = NULL;
|
|
|
|
errno = 0;
|
|
size = strtoul (op + strlen ("bts:size="), &endp, 16);
|
|
if (endp == NULL || *endp != 0 || errno != 0 || size > UINT_MAX)
|
|
{
|
|
strcpy (own_buf, "E.Bad size value.");
|
|
return -1;
|
|
}
|
|
|
|
current_btrace_conf.bts.size = (unsigned int) size;
|
|
}
|
|
else if (strncmp (op, "pt:size=", strlen ("pt:size=")) == 0)
|
|
{
|
|
unsigned long size;
|
|
char *endp = NULL;
|
|
|
|
errno = 0;
|
|
size = strtoul (op + strlen ("pt:size="), &endp, 16);
|
|
if (endp == NULL || *endp != 0 || errno != 0 || size > UINT_MAX)
|
|
{
|
|
strcpy (own_buf, "E.Bad size value.");
|
|
return -1;
|
|
}
|
|
|
|
current_btrace_conf.pt.size = (unsigned int) size;
|
|
}
|
|
else
|
|
{
|
|
strcpy (own_buf, "E.Bad Qbtrace configuration option.");
|
|
return -1;
|
|
}
|
|
|
|
write_ok (own_buf);
|
|
return 1;
|
|
}
|
|
|
|
/* Create the qMemTags packet reply given TAGS.
|
|
|
|
Returns true if parsing succeeded and false otherwise. */
|
|
|
|
static bool
|
|
create_fetch_memtags_reply (char *reply, const gdb::byte_vector &tags)
|
|
{
|
|
/* It is an error to pass a zero-sized tag vector. */
|
|
gdb_assert (tags.size () != 0);
|
|
|
|
std::string packet ("m");
|
|
|
|
/* Write the tag data. */
|
|
packet += bin2hex (tags.data (), tags.size ());
|
|
|
|
/* Check if the reply is too big for the packet to handle. */
|
|
if (PBUFSIZ < packet.size ())
|
|
return false;
|
|
|
|
strcpy (reply, packet.c_str ());
|
|
return true;
|
|
}
|
|
|
|
/* Parse the QMemTags request into ADDR, LEN and TAGS.
|
|
|
|
Returns true if parsing succeeded and false otherwise. */
|
|
|
|
static bool
|
|
parse_store_memtags_request (char *request, CORE_ADDR *addr, size_t *len,
|
|
gdb::byte_vector &tags, int *type)
|
|
{
|
|
gdb_assert (startswith (request, "QMemTags:"));
|
|
|
|
const char *p = request + strlen ("QMemTags:");
|
|
|
|
/* Read address and length. */
|
|
unsigned int length = 0;
|
|
p = decode_m_packet_params (p, addr, &length, ':');
|
|
*len = length;
|
|
|
|
/* Read the tag type. */
|
|
ULONGEST tag_type = 0;
|
|
p = unpack_varlen_hex (p, &tag_type);
|
|
*type = (int) tag_type;
|
|
|
|
/* Make sure there is a colon after the type. */
|
|
if (*p != ':')
|
|
return false;
|
|
|
|
/* Skip the colon. */
|
|
p++;
|
|
|
|
/* Read the tag data. */
|
|
tags = hex2bin (p);
|
|
|
|
return true;
|
|
}
|
|
|
|
/* Handle all of the extended 'Q' packets. */
|
|
|
|
static void
|
|
handle_general_set (char *own_buf)
|
|
{
|
|
client_state &cs = get_client_state ();
|
|
if (startswith (own_buf, "QPassSignals:"))
|
|
{
|
|
int numsigs = (int) GDB_SIGNAL_LAST, i;
|
|
const char *p = own_buf + strlen ("QPassSignals:");
|
|
CORE_ADDR cursig;
|
|
|
|
p = decode_address_to_semicolon (&cursig, p);
|
|
for (i = 0; i < numsigs; i++)
|
|
{
|
|
if (i == cursig)
|
|
{
|
|
cs.pass_signals[i] = 1;
|
|
if (*p == '\0')
|
|
/* Keep looping, to clear the remaining signals. */
|
|
cursig = -1;
|
|
else
|
|
p = decode_address_to_semicolon (&cursig, p);
|
|
}
|
|
else
|
|
cs.pass_signals[i] = 0;
|
|
}
|
|
strcpy (own_buf, "OK");
|
|
return;
|
|
}
|
|
|
|
if (startswith (own_buf, "QProgramSignals:"))
|
|
{
|
|
int numsigs = (int) GDB_SIGNAL_LAST, i;
|
|
const char *p = own_buf + strlen ("QProgramSignals:");
|
|
CORE_ADDR cursig;
|
|
|
|
cs.program_signals_p = 1;
|
|
|
|
p = decode_address_to_semicolon (&cursig, p);
|
|
for (i = 0; i < numsigs; i++)
|
|
{
|
|
if (i == cursig)
|
|
{
|
|
cs.program_signals[i] = 1;
|
|
if (*p == '\0')
|
|
/* Keep looping, to clear the remaining signals. */
|
|
cursig = -1;
|
|
else
|
|
p = decode_address_to_semicolon (&cursig, p);
|
|
}
|
|
else
|
|
cs.program_signals[i] = 0;
|
|
}
|
|
strcpy (own_buf, "OK");
|
|
return;
|
|
}
|
|
|
|
if (startswith (own_buf, "QCatchSyscalls:"))
|
|
{
|
|
const char *p = own_buf + sizeof ("QCatchSyscalls:") - 1;
|
|
int enabled = -1;
|
|
CORE_ADDR sysno;
|
|
struct process_info *process;
|
|
|
|
if (!target_running () || !target_supports_catch_syscall ())
|
|
{
|
|
write_enn (own_buf);
|
|
return;
|
|
}
|
|
|
|
if (strcmp (p, "0") == 0)
|
|
enabled = 0;
|
|
else if (p[0] == '1' && (p[1] == ';' || p[1] == '\0'))
|
|
enabled = 1;
|
|
else
|
|
{
|
|
fprintf (stderr, "Unknown catch-syscalls mode requested: %s\n",
|
|
own_buf);
|
|
write_enn (own_buf);
|
|
return;
|
|
}
|
|
|
|
process = current_process ();
|
|
process->syscalls_to_catch.clear ();
|
|
|
|
if (enabled)
|
|
{
|
|
p += 1;
|
|
if (*p == ';')
|
|
{
|
|
p += 1;
|
|
while (*p != '\0')
|
|
{
|
|
p = decode_address_to_semicolon (&sysno, p);
|
|
process->syscalls_to_catch.push_back (sysno);
|
|
}
|
|
}
|
|
else
|
|
process->syscalls_to_catch.push_back (ANY_SYSCALL);
|
|
}
|
|
|
|
write_ok (own_buf);
|
|
return;
|
|
}
|
|
|
|
if (strcmp (own_buf, "QEnvironmentReset") == 0)
|
|
{
|
|
our_environ = gdb_environ::from_host_environ ();
|
|
|
|
write_ok (own_buf);
|
|
return;
|
|
}
|
|
|
|
if (startswith (own_buf, "QEnvironmentHexEncoded:"))
|
|
{
|
|
const char *p = own_buf + sizeof ("QEnvironmentHexEncoded:") - 1;
|
|
/* The final form of the environment variable. FINAL_VAR will
|
|
hold the 'VAR=VALUE' format. */
|
|
std::string final_var = hex2str (p);
|
|
std::string var_name, var_value;
|
|
|
|
remote_debug_printf ("[QEnvironmentHexEncoded received '%s']", p);
|
|
remote_debug_printf ("[Environment variable to be set: '%s']",
|
|
final_var.c_str ());
|
|
|
|
size_t pos = final_var.find ('=');
|
|
if (pos == std::string::npos)
|
|
{
|
|
warning (_("Unexpected format for environment variable: '%s'"),
|
|
final_var.c_str ());
|
|
write_enn (own_buf);
|
|
return;
|
|
}
|
|
|
|
var_name = final_var.substr (0, pos);
|
|
var_value = final_var.substr (pos + 1, std::string::npos);
|
|
|
|
our_environ.set (var_name.c_str (), var_value.c_str ());
|
|
|
|
write_ok (own_buf);
|
|
return;
|
|
}
|
|
|
|
if (startswith (own_buf, "QEnvironmentUnset:"))
|
|
{
|
|
const char *p = own_buf + sizeof ("QEnvironmentUnset:") - 1;
|
|
std::string varname = hex2str (p);
|
|
|
|
remote_debug_printf ("[QEnvironmentUnset received '%s']", p);
|
|
remote_debug_printf ("[Environment variable to be unset: '%s']",
|
|
varname.c_str ());
|
|
|
|
our_environ.unset (varname.c_str ());
|
|
|
|
write_ok (own_buf);
|
|
return;
|
|
}
|
|
|
|
if (strcmp (own_buf, "QStartNoAckMode") == 0)
|
|
{
|
|
remote_debug_printf ("[noack mode enabled]");
|
|
|
|
cs.noack_mode = 1;
|
|
write_ok (own_buf);
|
|
return;
|
|
}
|
|
|
|
if (startswith (own_buf, "QNonStop:"))
|
|
{
|
|
char *mode = own_buf + 9;
|
|
int req = -1;
|
|
const 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 (the_target->start_non_stop (req == 1) != 0)
|
|
{
|
|
fprintf (stderr, "Setting %s mode failed\n", req_str);
|
|
write_enn (own_buf);
|
|
return;
|
|
}
|
|
|
|
non_stop = (req != 0);
|
|
|
|
remote_debug_printf ("[%s mode enabled]", req_str);
|
|
|
|
write_ok (own_buf);
|
|
return;
|
|
}
|
|
|
|
if (startswith (own_buf, "QDisableRandomization:"))
|
|
{
|
|
char *packet = own_buf + strlen ("QDisableRandomization:");
|
|
ULONGEST setting;
|
|
|
|
unpack_varlen_hex (packet, &setting);
|
|
cs.disable_randomization = setting;
|
|
|
|
remote_debug_printf (cs.disable_randomization
|
|
? "[address space randomization disabled]"
|
|
: "[address space randomization enabled]");
|
|
|
|
write_ok (own_buf);
|
|
return;
|
|
}
|
|
|
|
if (target_supports_tracepoints ()
|
|
&& handle_tracepoint_general_set (own_buf))
|
|
return;
|
|
|
|
if (startswith (own_buf, "QAgent:"))
|
|
{
|
|
char *mode = own_buf + strlen ("QAgent:");
|
|
int req = 0;
|
|
|
|
if (strcmp (mode, "0") == 0)
|
|
req = 0;
|
|
else if (strcmp (mode, "1") == 0)
|
|
req = 1;
|
|
else
|
|
{
|
|
/* We don't know what this value is, so complain to GDB. */
|
|
sprintf (own_buf, "E.Unknown QAgent value");
|
|
return;
|
|
}
|
|
|
|
/* Update the flag. */
|
|
use_agent = req;
|
|
remote_debug_printf ("[%s agent]", req ? "Enable" : "Disable");
|
|
write_ok (own_buf);
|
|
return;
|
|
}
|
|
|
|
if (handle_btrace_general_set (own_buf))
|
|
return;
|
|
|
|
if (handle_btrace_conf_general_set (own_buf))
|
|
return;
|
|
|
|
if (startswith (own_buf, "QThreadEvents:"))
|
|
{
|
|
char *mode = own_buf + strlen ("QThreadEvents:");
|
|
enum tribool req = TRIBOOL_UNKNOWN;
|
|
|
|
if (strcmp (mode, "0") == 0)
|
|
req = TRIBOOL_FALSE;
|
|
else if (strcmp (mode, "1") == 0)
|
|
req = TRIBOOL_TRUE;
|
|
else
|
|
{
|
|
/* We don't know what this mode is, so complain to GDB. */
|
|
std::string err
|
|
= string_printf ("E.Unknown thread-events mode requested: %s\n",
|
|
mode);
|
|
strcpy (own_buf, err.c_str ());
|
|
return;
|
|
}
|
|
|
|
cs.report_thread_events = (req == TRIBOOL_TRUE);
|
|
|
|
remote_debug_printf ("[thread events are now %s]\n",
|
|
cs.report_thread_events ? "enabled" : "disabled");
|
|
|
|
write_ok (own_buf);
|
|
return;
|
|
}
|
|
|
|
if (startswith (own_buf, "QStartupWithShell:"))
|
|
{
|
|
const char *value = own_buf + strlen ("QStartupWithShell:");
|
|
|
|
if (strcmp (value, "1") == 0)
|
|
startup_with_shell = true;
|
|
else if (strcmp (value, "0") == 0)
|
|
startup_with_shell = false;
|
|
else
|
|
{
|
|
/* Unknown value. */
|
|
fprintf (stderr, "Unknown value to startup-with-shell: %s\n",
|
|
own_buf);
|
|
write_enn (own_buf);
|
|
return;
|
|
}
|
|
|
|
remote_debug_printf ("[Inferior will %s started with shell]",
|
|
startup_with_shell ? "be" : "not be");
|
|
|
|
write_ok (own_buf);
|
|
return;
|
|
}
|
|
|
|
if (startswith (own_buf, "QSetWorkingDir:"))
|
|
{
|
|
const char *p = own_buf + strlen ("QSetWorkingDir:");
|
|
|
|
if (*p != '\0')
|
|
{
|
|
std::string path = hex2str (p);
|
|
|
|
remote_debug_printf ("[Set the inferior's current directory to %s]",
|
|
path.c_str ());
|
|
|
|
set_inferior_cwd (std::move (path));
|
|
}
|
|
else
|
|
{
|
|
/* An empty argument means that we should clear out any
|
|
previously set cwd for the inferior. */
|
|
set_inferior_cwd ("");
|
|
|
|
remote_debug_printf ("[Unset the inferior's current directory; will "
|
|
"use gdbserver's cwd]");
|
|
}
|
|
write_ok (own_buf);
|
|
|
|
return;
|
|
}
|
|
|
|
|
|
/* Handle store memory tags packets. */
|
|
if (startswith (own_buf, "QMemTags:")
|
|
&& target_supports_memory_tagging ())
|
|
{
|
|
gdb::byte_vector tags;
|
|
CORE_ADDR addr = 0;
|
|
size_t len = 0;
|
|
int type = 0;
|
|
|
|
require_running_or_return (own_buf);
|
|
|
|
bool ret = parse_store_memtags_request (own_buf, &addr, &len, tags,
|
|
&type);
|
|
|
|
if (ret)
|
|
ret = the_target->store_memtags (addr, len, tags, type);
|
|
|
|
if (!ret)
|
|
write_enn (own_buf);
|
|
else
|
|
write_ok (own_buf);
|
|
|
|
return;
|
|
}
|
|
|
|
/* Otherwise we didn't know what packet it was. Say we didn't
|
|
understand it. */
|
|
own_buf[0] = 0;
|
|
}
|
|
|
|
static const char *
|
|
get_features_xml (const char *annex)
|
|
{
|
|
const struct target_desc *desc = current_target_desc ();
|
|
|
|
/* `desc->xmltarget' defines what to return when looking for the
|
|
"target.xml" file. Its contents can either be verbatim XML code
|
|
(prefixed with a '@') or else the name of the actual XML file to
|
|
be used in place of "target.xml".
|
|
|
|
This variable is set up from the auto-generated
|
|
init_registers_... routine for the current target. */
|
|
|
|
if (strcmp (annex, "target.xml") == 0)
|
|
{
|
|
const char *ret = tdesc_get_features_xml (desc);
|
|
|
|
if (*ret == '@')
|
|
return ret + 1;
|
|
else
|
|
annex = ret;
|
|
}
|
|
|
|
#ifdef USE_XML
|
|
{
|
|
int i;
|
|
|
|
/* Look for the annex. */
|
|
for (i = 0; xml_builtin[i][0] != NULL; i++)
|
|
if (strcmp (annex, xml_builtin[i][0]) == 0)
|
|
break;
|
|
|
|
if (xml_builtin[i][0] != NULL)
|
|
return xml_builtin[i][1];
|
|
}
|
|
#endif
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static void
|
|
monitor_show_help (void)
|
|
{
|
|
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 (" set event-loop-debug <0|1>\n");
|
|
monitor_output (" Enable event loop debugging messages\n");
|
|
monitor_output (" set debug-format option1[,option2,...]\n");
|
|
monitor_output (" Add additional information to debugging messages\n");
|
|
monitor_output (" Options: all, none");
|
|
monitor_output (", timestamp");
|
|
monitor_output ("\n");
|
|
monitor_output (" exit\n");
|
|
monitor_output (" Quit GDBserver\n");
|
|
}
|
|
|
|
/* Read trace frame or inferior memory. Returns the number of bytes
|
|
actually read, zero when no further transfer is possible, and -1 on
|
|
error. Return of a positive value smaller than LEN does not
|
|
indicate there's no more to be read, only the end of the transfer.
|
|
E.g., when GDB reads memory from a traceframe, a first request may
|
|
be served from a memory block that does not cover the whole request
|
|
length. A following request gets the rest served from either
|
|
another block (of the same traceframe) or from the read-only
|
|
regions. */
|
|
|
|
static int
|
|
gdb_read_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len)
|
|
{
|
|
client_state &cs = get_client_state ();
|
|
int res;
|
|
|
|
if (cs.current_traceframe >= 0)
|
|
{
|
|
ULONGEST nbytes;
|
|
ULONGEST length = len;
|
|
|
|
if (traceframe_read_mem (cs.current_traceframe,
|
|
memaddr, myaddr, len, &nbytes))
|
|
return -1;
|
|
/* Data read from trace buffer, we're done. */
|
|
if (nbytes > 0)
|
|
return nbytes;
|
|
if (!in_readonly_region (memaddr, length))
|
|
return -1;
|
|
/* Otherwise we have a valid readonly case, fall through. */
|
|
/* (assume no half-trace half-real blocks for now) */
|
|
}
|
|
|
|
if (set_desired_process ())
|
|
res = read_inferior_memory (memaddr, myaddr, len);
|
|
else
|
|
res = 1;
|
|
|
|
return res == 0 ? len : -1;
|
|
}
|
|
|
|
/* 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)
|
|
{
|
|
client_state &cs = get_client_state ();
|
|
if (cs.current_traceframe >= 0)
|
|
return EIO;
|
|
else
|
|
{
|
|
int ret;
|
|
|
|
if (set_desired_process ())
|
|
ret = target_write_memory (memaddr, myaddr, len);
|
|
else
|
|
ret = EIO;
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
/* Handle qSearch:memory packets. */
|
|
|
|
static void
|
|
handle_search_memory (char *own_buf, int packet_len)
|
|
{
|
|
CORE_ADDR start_addr;
|
|
CORE_ADDR search_space_len;
|
|
gdb_byte *pattern;
|
|
unsigned int pattern_len;
|
|
int found;
|
|
CORE_ADDR found_addr;
|
|
int cmd_name_len = sizeof ("qSearch:memory:") - 1;
|
|
|
|
pattern = (gdb_byte *) malloc (packet_len);
|
|
if (pattern == NULL)
|
|
error ("Unable to allocate memory to perform the search");
|
|
|
|
if (decode_search_memory_packet (own_buf + cmd_name_len,
|
|
packet_len - cmd_name_len,
|
|
&start_addr, &search_space_len,
|
|
pattern, &pattern_len) < 0)
|
|
{
|
|
free (pattern);
|
|
error ("Error in parsing qSearch:memory packet");
|
|
}
|
|
|
|
auto read_memory = [] (CORE_ADDR addr, gdb_byte *result, size_t len)
|
|
{
|
|
return gdb_read_memory (addr, result, len) == len;
|
|
};
|
|
|
|
found = simple_search_memory (read_memory, start_addr, search_space_len,
|
|
pattern, pattern_len, &found_addr);
|
|
|
|
if (found > 0)
|
|
sprintf (own_buf, "1,%lx", (long) found_addr);
|
|
else if (found == 0)
|
|
strcpy (own_buf, "0");
|
|
else
|
|
strcpy (own_buf, "E00");
|
|
|
|
free (pattern);
|
|
}
|
|
|
|
/* Handle the "D" packet. */
|
|
|
|
static void
|
|
handle_detach (char *own_buf)
|
|
{
|
|
client_state &cs = get_client_state ();
|
|
|
|
process_info *process;
|
|
|
|
if (cs.multi_process)
|
|
{
|
|
/* skip 'D;' */
|
|
int pid = strtol (&own_buf[2], NULL, 16);
|
|
|
|
process = find_process_pid (pid);
|
|
}
|
|
else
|
|
{
|
|
process = (current_thread != nullptr
|
|
? get_thread_process (current_thread)
|
|
: nullptr);
|
|
}
|
|
|
|
if (process == NULL)
|
|
{
|
|
write_enn (own_buf);
|
|
return;
|
|
}
|
|
|
|
if ((tracing && disconnected_tracing) || any_persistent_commands (process))
|
|
{
|
|
if (tracing && disconnected_tracing)
|
|
fprintf (stderr,
|
|
"Disconnected tracing in effect, "
|
|
"leaving gdbserver attached to the process\n");
|
|
|
|
if (any_persistent_commands (process))
|
|
fprintf (stderr,
|
|
"Persistent commands are present, "
|
|
"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)
|
|
{
|
|
threads_debug_printf ("Forcing non-stop mode");
|
|
|
|
non_stop = true;
|
|
the_target->start_non_stop (true);
|
|
}
|
|
|
|
process->gdb_detached = 1;
|
|
|
|
/* Detaching implicitly resumes all threads. */
|
|
target_continue_no_signal (minus_one_ptid);
|
|
|
|
write_ok (own_buf);
|
|
return;
|
|
}
|
|
|
|
fprintf (stderr, "Detaching from process %d\n", process->pid);
|
|
stop_tracing ();
|
|
|
|
/* We'll need this after PROCESS has been destroyed. */
|
|
int pid = process->pid;
|
|
|
|
/* If this process has an unreported fork child, that child is not known to
|
|
GDB, so GDB won't take care of detaching it. We must do it here.
|
|
|
|
Here, we specifically don't want to use "safe iteration", as detaching
|
|
another process might delete the next thread in the iteration, which is
|
|
the one saved by the safe iterator. We will never delete the currently
|
|
iterated on thread, so standard iteration should be safe. */
|
|
for (thread_info *thread : all_threads)
|
|
{
|
|
/* Only threads that are of the process we are detaching. */
|
|
if (thread->id.pid () != pid)
|
|
continue;
|
|
|
|
/* Only threads that have a pending fork event. */
|
|
thread_info *child = target_thread_pending_child (thread);
|
|
if (child == nullptr)
|
|
continue;
|
|
|
|
process_info *fork_child_process = get_thread_process (child);
|
|
gdb_assert (fork_child_process != nullptr);
|
|
|
|
int fork_child_pid = fork_child_process->pid;
|
|
|
|
if (detach_inferior (fork_child_process) != 0)
|
|
warning (_("Failed to detach fork child %s, child of %s"),
|
|
target_pid_to_str (ptid_t (fork_child_pid)).c_str (),
|
|
target_pid_to_str (thread->id).c_str ());
|
|
}
|
|
|
|
if (detach_inferior (process) != 0)
|
|
write_enn (own_buf);
|
|
else
|
|
{
|
|
discard_queued_stop_replies (ptid_t (pid));
|
|
write_ok (own_buf);
|
|
|
|
if (extended_protocol || target_running ())
|
|
{
|
|
/* There is still at least one inferior remaining or
|
|
we are in extended mode, so don't terminate gdbserver,
|
|
and instead treat this like a normal program exit. */
|
|
cs.last_status.set_exited (0);
|
|
cs.last_ptid = ptid_t (pid);
|
|
|
|
switch_to_thread (nullptr);
|
|
}
|
|
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. */
|
|
join_inferior (pid);
|
|
exit (0);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Parse options to --debug-format= and "monitor set debug-format".
|
|
ARG is the text after "--debug-format=" or "monitor set debug-format".
|
|
IS_MONITOR is non-zero if we're invoked via "monitor set debug-format".
|
|
This triggers calls to monitor_output.
|
|
The result is an empty string if all options were parsed ok, otherwise an
|
|
error message which the caller must free.
|
|
|
|
N.B. These commands affect all debug format settings, they are not
|
|
cumulative. If a format is not specified, it is turned off.
|
|
However, we don't go to extra trouble with things like
|
|
"monitor set debug-format all,none,timestamp".
|
|
Instead we just parse them one at a time, in order.
|
|
|
|
The syntax for "monitor set debug" we support here is not identical
|
|
to gdb's "set debug foo on|off" because we also use this function to
|
|
parse "--debug-format=foo,bar". */
|
|
|
|
static std::string
|
|
parse_debug_format_options (const char *arg, int is_monitor)
|
|
{
|
|
/* First turn all debug format options off. */
|
|
debug_timestamp = 0;
|
|
|
|
/* First remove leading spaces, for "monitor set debug-format". */
|
|
while (isspace (*arg))
|
|
++arg;
|
|
|
|
std::vector<gdb::unique_xmalloc_ptr<char>> options
|
|
= delim_string_to_char_ptr_vec (arg, ',');
|
|
|
|
for (const gdb::unique_xmalloc_ptr<char> &option : options)
|
|
{
|
|
if (strcmp (option.get (), "all") == 0)
|
|
{
|
|
debug_timestamp = 1;
|
|
if (is_monitor)
|
|
monitor_output ("All extra debug format options enabled.\n");
|
|
}
|
|
else if (strcmp (option.get (), "none") == 0)
|
|
{
|
|
debug_timestamp = 0;
|
|
if (is_monitor)
|
|
monitor_output ("All extra debug format options disabled.\n");
|
|
}
|
|
else if (strcmp (option.get (), "timestamp") == 0)
|
|
{
|
|
debug_timestamp = 1;
|
|
if (is_monitor)
|
|
monitor_output ("Timestamps will be added to debug output.\n");
|
|
}
|
|
else if (*option == '\0')
|
|
{
|
|
/* An empty option, e.g., "--debug-format=foo,,bar", is ignored. */
|
|
continue;
|
|
}
|
|
else
|
|
return string_printf ("Unknown debug-format argument: \"%s\"\n",
|
|
option.get ());
|
|
}
|
|
|
|
return std::string ();
|
|
}
|
|
|
|
/* Handle monitor commands not handled by target-specific handlers. */
|
|
|
|
static void
|
|
handle_monitor_command (char *mon, char *own_buf)
|
|
{
|
|
if (strcmp (mon, "set debug 1") == 0)
|
|
{
|
|
debug_threads = true;
|
|
monitor_output ("Debug output enabled.\n");
|
|
}
|
|
else if (strcmp (mon, "set debug 0") == 0)
|
|
{
|
|
debug_threads = false;
|
|
monitor_output ("Debug output disabled.\n");
|
|
}
|
|
else if (strcmp (mon, "set debug-hw-points 1") == 0)
|
|
{
|
|
show_debug_regs = 1;
|
|
monitor_output ("H/W point debugging output enabled.\n");
|
|
}
|
|
else if (strcmp (mon, "set debug-hw-points 0") == 0)
|
|
{
|
|
show_debug_regs = 0;
|
|
monitor_output ("H/W point debugging output disabled.\n");
|
|
}
|
|
else if (strcmp (mon, "set remote-debug 1") == 0)
|
|
{
|
|
remote_debug = true;
|
|
monitor_output ("Protocol debug output enabled.\n");
|
|
}
|
|
else if (strcmp (mon, "set remote-debug 0") == 0)
|
|
{
|
|
remote_debug = false;
|
|
monitor_output ("Protocol debug output disabled.\n");
|
|
}
|
|
else if (strcmp (mon, "set event-loop-debug 1") == 0)
|
|
{
|
|
debug_event_loop = debug_event_loop_kind::ALL;
|
|
monitor_output ("Event loop debug output enabled.\n");
|
|
}
|
|
else if (strcmp (mon, "set event-loop-debug 0") == 0)
|
|
{
|
|
debug_event_loop = debug_event_loop_kind::OFF;
|
|
monitor_output ("Event loop debug output disabled.\n");
|
|
}
|
|
else if (startswith (mon, "set debug-format "))
|
|
{
|
|
std::string error_msg
|
|
= parse_debug_format_options (mon + sizeof ("set debug-format ") - 1,
|
|
1);
|
|
|
|
if (!error_msg.empty ())
|
|
{
|
|
monitor_output (error_msg.c_str ());
|
|
monitor_show_help ();
|
|
write_enn (own_buf);
|
|
}
|
|
}
|
|
else if (strcmp (mon, "set debug-file") == 0)
|
|
debug_set_output (nullptr);
|
|
else if (startswith (mon, "set debug-file "))
|
|
debug_set_output (mon + sizeof ("set debug-file ") - 1);
|
|
else if (strcmp (mon, "help") == 0)
|
|
monitor_show_help ();
|
|
else if (strcmp (mon, "exit") == 0)
|
|
exit_requested = true;
|
|
else
|
|
{
|
|
monitor_output ("Unknown monitor command.\n\n");
|
|
monitor_show_help ();
|
|
write_enn (own_buf);
|
|
}
|
|
}
|
|
|
|
/* Associates a callback with each supported qXfer'able object. */
|
|
|
|
struct qxfer
|
|
{
|
|
/* The object this handler handles. */
|
|
const char *object;
|
|
|
|
/* 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.
|
|
|
|
Return the number of bytes actually transfered, zero when no
|
|
further transfer is possible, -1 on error, -2 when the transfer
|
|
is not supported, and -3 on a verbose error message that should
|
|
be preserved. Return of a positive value smaller than LEN does
|
|
not indicate the end of the object, only the end of the transfer.
|
|
|
|
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);
|
|
};
|
|
|
|
/* Handle qXfer:auxv:read. */
|
|
|
|
static int
|
|
handle_qxfer_auxv (const char *annex,
|
|
gdb_byte *readbuf, const gdb_byte *writebuf,
|
|
ULONGEST offset, LONGEST len)
|
|
{
|
|
if (!the_target->supports_read_auxv () || writebuf != NULL)
|
|
return -2;
|
|
|
|
if (annex[0] != '\0' || current_thread == NULL)
|
|
return -1;
|
|
|
|
return the_target->read_auxv (current_thread->id.pid (), offset, readbuf,
|
|
len);
|
|
}
|
|
|
|
/* Handle qXfer:exec-file:read. */
|
|
|
|
static int
|
|
handle_qxfer_exec_file (const char *annex,
|
|
gdb_byte *readbuf, const gdb_byte *writebuf,
|
|
ULONGEST offset, LONGEST len)
|
|
{
|
|
ULONGEST pid;
|
|
int total_len;
|
|
|
|
if (!the_target->supports_pid_to_exec_file () || writebuf != NULL)
|
|
return -2;
|
|
|
|
if (annex[0] == '\0')
|
|
{
|
|
if (current_thread == NULL)
|
|
return -1;
|
|
|
|
pid = pid_of (current_thread);
|
|
}
|
|
else
|
|
{
|
|
annex = unpack_varlen_hex (annex, &pid);
|
|
if (annex[0] != '\0')
|
|
return -1;
|
|
}
|
|
|
|
if (pid <= 0)
|
|
return -1;
|
|
|
|
const char *file = the_target->pid_to_exec_file (pid);
|
|
if (file == NULL)
|
|
return -1;
|
|
|
|
total_len = strlen (file);
|
|
|
|
if (offset > total_len)
|
|
return -1;
|
|
|
|
if (offset + len > total_len)
|
|
len = total_len - offset;
|
|
|
|
memcpy (readbuf, file + offset, len);
|
|
return len;
|
|
}
|
|
|
|
/* Handle qXfer:features:read. */
|
|
|
|
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;
|
|
|
|
if (writebuf != NULL)
|
|
return -2;
|
|
|
|
if (!target_running ())
|
|
return -1;
|
|
|
|
/* Grab the correct annex. */
|
|
document = get_features_xml (annex);
|
|
if (document == NULL)
|
|
return -1;
|
|
|
|
total_len = strlen (document);
|
|
|
|
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)
|
|
{
|
|
if (writebuf != NULL)
|
|
return -2;
|
|
|
|
if (annex[0] != '\0' || current_thread == NULL)
|
|
return -1;
|
|
|
|
std::string document = "<library-list version=\"1.0\">\n";
|
|
|
|
process_info *proc = current_process ();
|
|
for (const dll_info &dll : proc->all_dlls)
|
|
document += string_printf
|
|
(" <library name=\"%s\"><segment address=\"0x%s\"/></library>\n",
|
|
dll.name.c_str (), paddress (dll.base_addr));
|
|
|
|
document += "</library-list>\n";
|
|
|
|
if (offset > document.length ())
|
|
return -1;
|
|
|
|
if (offset + len > document.length ())
|
|
len = document.length () - offset;
|
|
|
|
memcpy (readbuf, &document[offset], len);
|
|
|
|
return len;
|
|
}
|
|
|
|
/* Handle qXfer:libraries-svr4:read. */
|
|
|
|
static int
|
|
handle_qxfer_libraries_svr4 (const char *annex,
|
|
gdb_byte *readbuf, const gdb_byte *writebuf,
|
|
ULONGEST offset, LONGEST len)
|
|
{
|
|
if (writebuf != NULL)
|
|
return -2;
|
|
|
|
if (current_thread == NULL
|
|
|| !the_target->supports_qxfer_libraries_svr4 ())
|
|
return -1;
|
|
|
|
return the_target->qxfer_libraries_svr4 (annex, readbuf, writebuf,
|
|
offset, 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->supports_qxfer_osdata () || 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->supports_qxfer_siginfo ())
|
|
return -2;
|
|
|
|
if (annex[0] != '\0' || current_thread == NULL)
|
|
return -1;
|
|
|
|
return the_target->qxfer_siginfo (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)
|
|
{
|
|
client_state &cs = get_client_state ();
|
|
ULONGEST nbytes;
|
|
|
|
if (writebuf != NULL)
|
|
return -2;
|
|
|
|
if (annex[0] != '\0' || current_thread == NULL
|
|
|| cs.current_traceframe == -1)
|
|
return -1;
|
|
|
|
if (traceframe_read_sdata (cs.current_traceframe, offset,
|
|
readbuf, len, &nbytes))
|
|
return -1;
|
|
return nbytes;
|
|
}
|
|
|
|
/* Helper for handle_qxfer_threads_proper.
|
|
Emit the XML to describe the thread of INF. */
|
|
|
|
static void
|
|
handle_qxfer_threads_worker (thread_info *thread, std::string *buffer)
|
|
{
|
|
ptid_t ptid = ptid_of (thread);
|
|
char ptid_s[100];
|
|
int core = target_core_of_thread (ptid);
|
|
char core_s[21];
|
|
const char *name = target_thread_name (ptid);
|
|
int handle_len;
|
|
gdb_byte *handle;
|
|
bool handle_status = target_thread_handle (ptid, &handle, &handle_len);
|
|
|
|
/* If this is a fork or vfork child (has a fork parent), GDB does not yet
|
|
know about this process, and must not know about it until it gets the
|
|
corresponding (v)fork event. Exclude this thread from the list. */
|
|
if (target_thread_pending_parent (thread) != nullptr)
|
|
return;
|
|
|
|
write_ptid (ptid_s, ptid);
|
|
|
|
string_xml_appendf (*buffer, "<thread id=\"%s\"", ptid_s);
|
|
|
|
if (core != -1)
|
|
{
|
|
sprintf (core_s, "%d", core);
|
|
string_xml_appendf (*buffer, " core=\"%s\"", core_s);
|
|
}
|
|
|
|
if (name != NULL)
|
|
string_xml_appendf (*buffer, " name=\"%s\"", name);
|
|
|
|
if (handle_status)
|
|
{
|
|
char *handle_s = (char *) alloca (handle_len * 2 + 1);
|
|
bin2hex (handle, handle_s, handle_len);
|
|
string_xml_appendf (*buffer, " handle=\"%s\"", handle_s);
|
|
}
|
|
|
|
string_xml_appendf (*buffer, "/>\n");
|
|
}
|
|
|
|
/* Helper for handle_qxfer_threads. Return true on success, false
|
|
otherwise. */
|
|
|
|
static bool
|
|
handle_qxfer_threads_proper (std::string *buffer)
|
|
{
|
|
*buffer += "<threads>\n";
|
|
|
|
/* The target may need to access memory and registers (e.g. via
|
|
libthread_db) to fetch thread properties. Even if don't need to
|
|
stop threads to access memory, we still will need to be able to
|
|
access registers, and other ptrace accesses like
|
|
PTRACE_GET_THREAD_AREA that require a paused thread. Pause all
|
|
threads here, so that we pause each thread at most once for all
|
|
accesses. */
|
|
if (non_stop)
|
|
target_pause_all (true);
|
|
|
|
for_each_thread ([&] (thread_info *thread)
|
|
{
|
|
handle_qxfer_threads_worker (thread, buffer);
|
|
});
|
|
|
|
if (non_stop)
|
|
target_unpause_all (true);
|
|
|
|
*buffer += "</threads>\n";
|
|
return true;
|
|
}
|
|
|
|
/* Handle qXfer:threads:read. */
|
|
|
|
static int
|
|
handle_qxfer_threads (const char *annex,
|
|
gdb_byte *readbuf, const gdb_byte *writebuf,
|
|
ULONGEST offset, LONGEST len)
|
|
{
|
|
static std::string result;
|
|
|
|
if (writebuf != NULL)
|
|
return -2;
|
|
|
|
if (annex[0] != '\0')
|
|
return -1;
|
|
|
|
if (offset == 0)
|
|
{
|
|
/* When asked for data at offset 0, generate everything and store into
|
|
'result'. Successive reads will be served off 'result'. */
|
|
result.clear ();
|
|
|
|
bool res = handle_qxfer_threads_proper (&result);
|
|
|
|
if (!res)
|
|
return -1;
|
|
}
|
|
|
|
if (offset >= result.length ())
|
|
{
|
|
/* We're out of data. */
|
|
result.clear ();
|
|
return 0;
|
|
}
|
|
|
|
if (len > result.length () - offset)
|
|
len = result.length () - offset;
|
|
|
|
memcpy (readbuf, result.c_str () + offset, len);
|
|
|
|
return len;
|
|
}
|
|
|
|
/* Handle qXfer:traceframe-info:read. */
|
|
|
|
static int
|
|
handle_qxfer_traceframe_info (const char *annex,
|
|
gdb_byte *readbuf, const gdb_byte *writebuf,
|
|
ULONGEST offset, LONGEST len)
|
|
{
|
|
client_state &cs = get_client_state ();
|
|
static std::string result;
|
|
|
|
if (writebuf != NULL)
|
|
return -2;
|
|
|
|
if (!target_running () || annex[0] != '\0' || cs.current_traceframe == -1)
|
|
return -1;
|
|
|
|
if (offset == 0)
|
|
{
|
|
/* When asked for data at offset 0, generate everything and
|
|
store into 'result'. Successive reads will be served off
|
|
'result'. */
|
|
result.clear ();
|
|
|
|
traceframe_read_info (cs.current_traceframe, &result);
|
|
}
|
|
|
|
if (offset >= result.length ())
|
|
{
|
|
/* We're out of data. */
|
|
result.clear ();
|
|
return 0;
|
|
}
|
|
|
|
if (len > result.length () - offset)
|
|
len = result.length () - offset;
|
|
|
|
memcpy (readbuf, result.c_str () + offset, len);
|
|
return len;
|
|
}
|
|
|
|
/* Handle qXfer:fdpic:read. */
|
|
|
|
static int
|
|
handle_qxfer_fdpic (const char *annex, gdb_byte *readbuf,
|
|
const gdb_byte *writebuf, ULONGEST offset, LONGEST len)
|
|
{
|
|
if (!the_target->supports_read_loadmap ())
|
|
return -2;
|
|
|
|
if (current_thread == NULL)
|
|
return -1;
|
|
|
|
return the_target->read_loadmap (annex, offset, readbuf, len);
|
|
}
|
|
|
|
/* Handle qXfer:btrace:read. */
|
|
|
|
static int
|
|
handle_qxfer_btrace (const char *annex,
|
|
gdb_byte *readbuf, const gdb_byte *writebuf,
|
|
ULONGEST offset, LONGEST len)
|
|
{
|
|
client_state &cs = get_client_state ();
|
|
static std::string cache;
|
|
struct thread_info *thread;
|
|
enum btrace_read_type type;
|
|
int result;
|
|
|
|
if (writebuf != NULL)
|
|
return -2;
|
|
|
|
if (cs.general_thread == null_ptid
|
|
|| cs.general_thread == minus_one_ptid)
|
|
{
|
|
strcpy (cs.own_buf, "E.Must select a single thread.");
|
|
return -3;
|
|
}
|
|
|
|
thread = find_thread_ptid (cs.general_thread);
|
|
if (thread == NULL)
|
|
{
|
|
strcpy (cs.own_buf, "E.No such thread.");
|
|
return -3;
|
|
}
|
|
|
|
if (thread->btrace == NULL)
|
|
{
|
|
strcpy (cs.own_buf, "E.Btrace not enabled.");
|
|
return -3;
|
|
}
|
|
|
|
if (strcmp (annex, "all") == 0)
|
|
type = BTRACE_READ_ALL;
|
|
else if (strcmp (annex, "new") == 0)
|
|
type = BTRACE_READ_NEW;
|
|
else if (strcmp (annex, "delta") == 0)
|
|
type = BTRACE_READ_DELTA;
|
|
else
|
|
{
|
|
strcpy (cs.own_buf, "E.Bad annex.");
|
|
return -3;
|
|
}
|
|
|
|
if (offset == 0)
|
|
{
|
|
cache.clear ();
|
|
|
|
try
|
|
{
|
|
result = target_read_btrace (thread->btrace, &cache, type);
|
|
if (result != 0)
|
|
memcpy (cs.own_buf, cache.c_str (), cache.length ());
|
|
}
|
|
catch (const gdb_exception_error &exception)
|
|
{
|
|
sprintf (cs.own_buf, "E.%s", exception.what ());
|
|
result = -1;
|
|
}
|
|
|
|
if (result != 0)
|
|
return -3;
|
|
}
|
|
else if (offset > cache.length ())
|
|
{
|
|
cache.clear ();
|
|
return -3;
|
|
}
|
|
|
|
if (len > cache.length () - offset)
|
|
len = cache.length () - offset;
|
|
|
|
memcpy (readbuf, cache.c_str () + offset, len);
|
|
|
|
return len;
|
|
}
|
|
|
|
/* Handle qXfer:btrace-conf:read. */
|
|
|
|
static int
|
|
handle_qxfer_btrace_conf (const char *annex,
|
|
gdb_byte *readbuf, const gdb_byte *writebuf,
|
|
ULONGEST offset, LONGEST len)
|
|
{
|
|
client_state &cs = get_client_state ();
|
|
static std::string cache;
|
|
struct thread_info *thread;
|
|
int result;
|
|
|
|
if (writebuf != NULL)
|
|
return -2;
|
|
|
|
if (annex[0] != '\0')
|
|
return -1;
|
|
|
|
if (cs.general_thread == null_ptid
|
|
|| cs.general_thread == minus_one_ptid)
|
|
{
|
|
strcpy (cs.own_buf, "E.Must select a single thread.");
|
|
return -3;
|
|
}
|
|
|
|
thread = find_thread_ptid (cs.general_thread);
|
|
if (thread == NULL)
|
|
{
|
|
strcpy (cs.own_buf, "E.No such thread.");
|
|
return -3;
|
|
}
|
|
|
|
if (thread->btrace == NULL)
|
|
{
|
|
strcpy (cs.own_buf, "E.Btrace not enabled.");
|
|
return -3;
|
|
}
|
|
|
|
if (offset == 0)
|
|
{
|
|
cache.clear ();
|
|
|
|
try
|
|
{
|
|
result = target_read_btrace_conf (thread->btrace, &cache);
|
|
if (result != 0)
|
|
memcpy (cs.own_buf, cache.c_str (), cache.length ());
|
|
}
|
|
catch (const gdb_exception_error &exception)
|
|
{
|
|
sprintf (cs.own_buf, "E.%s", exception.what ());
|
|
result = -1;
|
|
}
|
|
|
|
if (result != 0)
|
|
return -3;
|
|
}
|
|
else if (offset > cache.length ())
|
|
{
|
|
cache.clear ();
|
|
return -3;
|
|
}
|
|
|
|
if (len > cache.length () - offset)
|
|
len = cache.length () - offset;
|
|
|
|
memcpy (readbuf, cache.c_str () + offset, len);
|
|
|
|
return len;
|
|
}
|
|
|
|
static const struct qxfer qxfer_packets[] =
|
|
{
|
|
{ "auxv", handle_qxfer_auxv },
|
|
{ "btrace", handle_qxfer_btrace },
|
|
{ "btrace-conf", handle_qxfer_btrace_conf },
|
|
{ "exec-file", handle_qxfer_exec_file},
|
|
{ "fdpic", handle_qxfer_fdpic},
|
|
{ "features", handle_qxfer_features },
|
|
{ "libraries", handle_qxfer_libraries },
|
|
{ "libraries-svr4", handle_qxfer_libraries_svr4 },
|
|
{ "osdata", handle_qxfer_osdata },
|
|
{ "siginfo", handle_qxfer_siginfo },
|
|
{ "statictrace", handle_qxfer_statictrace },
|
|
{ "threads", handle_qxfer_threads },
|
|
{ "traceframe-info", handle_qxfer_traceframe_info },
|
|
};
|
|
|
|
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 (!startswith (own_buf, "qXfer:"))
|
|
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;
|
|
}
|
|
|
|
for (i = 0;
|
|
i < sizeof (qxfer_packets) / sizeof (qxfer_packets[0]);
|
|
i++)
|
|
{
|
|
const struct qxfer *q = &qxfer_packets[i];
|
|
|
|
if (strcmp (object, q->object) == 0)
|
|
{
|
|
if (strcmp (rw, "read") == 0)
|
|
{
|
|
unsigned char *data;
|
|
int n;
|
|
CORE_ADDR ofs;
|
|
unsigned int len;
|
|
|
|
/* 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 = (unsigned char *) 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 == -3)
|
|
{
|
|
/* Preserve error message. */
|
|
}
|
|
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 = (unsigned char *) 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 == -3)
|
|
{
|
|
/* Preserve error message. */
|
|
}
|
|
else if (n < 0)
|
|
write_enn (own_buf);
|
|
else
|
|
sprintf (own_buf, "%x", n);
|
|
|
|
free (data);
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
return 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)
|
|
{
|
|
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 = xcrc32 (&byte, 1, crc);
|
|
base++;
|
|
}
|
|
return (unsigned long long) crc;
|
|
}
|
|
|
|
/* Parse the qMemTags packet request into ADDR and LEN. */
|
|
|
|
static void
|
|
parse_fetch_memtags_request (char *request, CORE_ADDR *addr, size_t *len,
|
|
int *type)
|
|
{
|
|
gdb_assert (startswith (request, "qMemTags:"));
|
|
|
|
const char *p = request + strlen ("qMemTags:");
|
|
|
|
/* Read address and length. */
|
|
unsigned int length = 0;
|
|
p = decode_m_packet_params (p, addr, &length, ':');
|
|
*len = length;
|
|
|
|
/* Read the tag type. */
|
|
ULONGEST tag_type = 0;
|
|
p = unpack_varlen_hex (p, &tag_type);
|
|
*type = (int) tag_type;
|
|
}
|
|
|
|
/* Add supported btrace packets to BUF. */
|
|
|
|
static void
|
|
supported_btrace_packets (char *buf)
|
|
{
|
|
strcat (buf, ";Qbtrace:bts+");
|
|
strcat (buf, ";Qbtrace-conf:bts:size+");
|
|
strcat (buf, ";Qbtrace:pt+");
|
|
strcat (buf, ";Qbtrace-conf:pt:size+");
|
|
strcat (buf, ";Qbtrace:off+");
|
|
strcat (buf, ";qXfer:btrace:read+");
|
|
strcat (buf, ";qXfer:btrace-conf:read+");
|
|
}
|
|
|
|
/* Handle all of the extended 'q' packets. */
|
|
|
|
static void
|
|
handle_query (char *own_buf, int packet_len, int *new_packet_len_p)
|
|
{
|
|
client_state &cs = get_client_state ();
|
|
static std::list<thread_info *>::const_iterator thread_iter;
|
|
|
|
/* Reply the current thread id. */
|
|
if (strcmp ("qC", own_buf) == 0 && !disable_packet_qC)
|
|
{
|
|
ptid_t ptid;
|
|
require_running_or_return (own_buf);
|
|
|
|
if (cs.general_thread != null_ptid && cs.general_thread != minus_one_ptid)
|
|
ptid = cs.general_thread;
|
|
else
|
|
{
|
|
thread_iter = all_threads.begin ();
|
|
ptid = (*thread_iter)->id;
|
|
}
|
|
|
|
sprintf (own_buf, "QC");
|
|
own_buf += 2;
|
|
write_ptid (own_buf, ptid);
|
|
return;
|
|
}
|
|
|
|
if (strcmp ("qSymbol::", own_buf) == 0)
|
|
{
|
|
scoped_restore_current_thread restore_thread;
|
|
|
|
/* For qSymbol, GDB only changes the current thread if the
|
|
previous current thread was of a different process. So if
|
|
the previous thread is gone, we need to pick another one of
|
|
the same process. This can happen e.g., if we followed an
|
|
exec in a non-leader thread. */
|
|
if (current_thread == NULL)
|
|
{
|
|
thread_info *any_thread
|
|
= find_any_thread_of_pid (cs.general_thread.pid ());
|
|
switch_to_thread (any_thread);
|
|
|
|
/* Just in case, if we didn't find a thread, then bail out
|
|
instead of crashing. */
|
|
if (current_thread == NULL)
|
|
{
|
|
write_enn (own_buf);
|
|
return;
|
|
}
|
|
}
|
|
|
|
/* 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 ();
|
|
|
|
if (current_thread != NULL)
|
|
the_target->look_up_symbols ();
|
|
|
|
strcpy (own_buf, "OK");
|
|
return;
|
|
}
|
|
|
|
if (!disable_packet_qfThreadInfo)
|
|
{
|
|
if (strcmp ("qfThreadInfo", own_buf) == 0)
|
|
{
|
|
require_running_or_return (own_buf);
|
|
thread_iter = all_threads.begin ();
|
|
|
|
*own_buf++ = 'm';
|
|
ptid_t ptid = (*thread_iter)->id;
|
|
write_ptid (own_buf, ptid);
|
|
thread_iter++;
|
|
return;
|
|
}
|
|
|
|
if (strcmp ("qsThreadInfo", own_buf) == 0)
|
|
{
|
|
require_running_or_return (own_buf);
|
|
if (thread_iter != all_threads.end ())
|
|
{
|
|
*own_buf++ = 'm';
|
|
ptid_t ptid = (*thread_iter)->id;
|
|
write_ptid (own_buf, ptid);
|
|
thread_iter++;
|
|
return;
|
|
}
|
|
else
|
|
{
|
|
sprintf (own_buf, "l");
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (the_target->supports_read_offsets ()
|
|
&& strcmp ("qOffsets", own_buf) == 0)
|
|
{
|
|
CORE_ADDR text, data;
|
|
|
|
require_running_or_return (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;
|
|
}
|
|
|
|
/* Protocol features query. */
|
|
if (startswith (own_buf, "qSupported")
|
|
&& (own_buf[10] == ':' || own_buf[10] == '\0'))
|
|
{
|
|
char *p = &own_buf[10];
|
|
int gdb_supports_qRelocInsn = 0;
|
|
|
|
/* Process each feature being provided by GDB. The first
|
|
feature will follow a ':', and latter features will follow
|
|
';'. */
|
|
if (*p == ':')
|
|
{
|
|
std::vector<std::string> qsupported;
|
|
std::vector<const char *> unknowns;
|
|
|
|
/* Two passes, to avoid nested strtok calls in
|
|
target_process_qsupported. */
|
|
char *saveptr;
|
|
for (p = strtok_r (p + 1, ";", &saveptr);
|
|
p != NULL;
|
|
p = strtok_r (NULL, ";", &saveptr))
|
|
qsupported.emplace_back (p);
|
|
|
|
for (const std::string &feature : qsupported)
|
|
{
|
|
if (feature == "multiprocess+")
|
|
{
|
|
/* GDB supports and wants multi-process support if
|
|
possible. */
|
|
if (target_supports_multi_process ())
|
|
cs.multi_process = 1;
|
|
}
|
|
else if (feature == "qRelocInsn+")
|
|
{
|
|
/* GDB supports relocate instruction requests. */
|
|
gdb_supports_qRelocInsn = 1;
|
|
}
|
|
else if (feature == "swbreak+")
|
|
{
|
|
/* GDB wants us to report whether a trap is caused
|
|
by a software breakpoint and for us to handle PC
|
|
adjustment if necessary on this target. */
|
|
if (target_supports_stopped_by_sw_breakpoint ())
|
|
cs.swbreak_feature = 1;
|
|
}
|
|
else if (feature == "hwbreak+")
|
|
{
|
|
/* GDB wants us to report whether a trap is caused
|
|
by a hardware breakpoint. */
|
|
if (target_supports_stopped_by_hw_breakpoint ())
|
|
cs.hwbreak_feature = 1;
|
|
}
|
|
else if (feature == "fork-events+")
|
|
{
|
|
/* GDB supports and wants fork events if possible. */
|
|
if (target_supports_fork_events ())
|
|
cs.report_fork_events = 1;
|
|
}
|
|
else if (feature == "vfork-events+")
|
|
{
|
|
/* GDB supports and wants vfork events if possible. */
|
|
if (target_supports_vfork_events ())
|
|
cs.report_vfork_events = 1;
|
|
}
|
|
else if (feature == "exec-events+")
|
|
{
|
|
/* GDB supports and wants exec events if possible. */
|
|
if (target_supports_exec_events ())
|
|
cs.report_exec_events = 1;
|
|
}
|
|
else if (feature == "vContSupported+")
|
|
cs.vCont_supported = 1;
|
|
else if (feature == "QThreadEvents+")
|
|
;
|
|
else if (feature == "no-resumed+")
|
|
{
|
|
/* GDB supports and wants TARGET_WAITKIND_NO_RESUMED
|
|
events. */
|
|
report_no_resumed = true;
|
|
}
|
|
else if (feature == "memory-tagging+")
|
|
{
|
|
/* GDB supports memory tagging features. */
|
|
if (target_supports_memory_tagging ())
|
|
cs.memory_tagging_feature = true;
|
|
}
|
|
else
|
|
{
|
|
/* Move the unknown features all together. */
|
|
unknowns.push_back (feature.c_str ());
|
|
}
|
|
}
|
|
|
|
/* Give the target backend a chance to process the unknown
|
|
features. */
|
|
target_process_qsupported (unknowns);
|
|
}
|
|
|
|
sprintf (own_buf,
|
|
"PacketSize=%x;QPassSignals+;QProgramSignals+;"
|
|
"QStartupWithShell+;QEnvironmentHexEncoded+;"
|
|
"QEnvironmentReset+;QEnvironmentUnset+;"
|
|
"QSetWorkingDir+",
|
|
PBUFSIZ - 1);
|
|
|
|
if (target_supports_catch_syscall ())
|
|
strcat (own_buf, ";QCatchSyscalls+");
|
|
|
|
if (the_target->supports_qxfer_libraries_svr4 ())
|
|
strcat (own_buf, ";qXfer:libraries-svr4:read+"
|
|
";augmented-libraries-svr4-read+");
|
|
else
|
|
{
|
|
/* We do not have any hook to indicate whether the non-SVR4 target
|
|
backend supports qXfer:libraries:read, so always report it. */
|
|
strcat (own_buf, ";qXfer:libraries:read+");
|
|
}
|
|
|
|
if (the_target->supports_read_auxv ())
|
|
strcat (own_buf, ";qXfer:auxv:read+");
|
|
|
|
if (the_target->supports_qxfer_siginfo ())
|
|
strcat (own_buf, ";qXfer:siginfo:read+;qXfer:siginfo:write+");
|
|
|
|
if (the_target->supports_read_loadmap ())
|
|
strcat (own_buf, ";qXfer:fdpic:read+");
|
|
|
|
/* We always report qXfer:features:read, as targets may
|
|
install XML files on a subsequent call to arch_setup.
|
|
If we reported to GDB on startup that we don't support
|
|
qXfer:feature:read at all, we will never be re-queried. */
|
|
strcat (own_buf, ";qXfer:features:read+");
|
|
|
|
if (cs.transport_is_reliable)
|
|
strcat (own_buf, ";QStartNoAckMode+");
|
|
|
|
if (the_target->supports_qxfer_osdata ())
|
|
strcat (own_buf, ";qXfer:osdata:read+");
|
|
|
|
if (target_supports_multi_process ())
|
|
strcat (own_buf, ";multiprocess+");
|
|
|
|
if (target_supports_fork_events ())
|
|
strcat (own_buf, ";fork-events+");
|
|
|
|
if (target_supports_vfork_events ())
|
|
strcat (own_buf, ";vfork-events+");
|
|
|
|
if (target_supports_exec_events ())
|
|
strcat (own_buf, ";exec-events+");
|
|
|
|
if (target_supports_non_stop ())
|
|
strcat (own_buf, ";QNonStop+");
|
|
|
|
if (target_supports_disable_randomization ())
|
|
strcat (own_buf, ";QDisableRandomization+");
|
|
|
|
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, ";InstallInTrace+");
|
|
strcat (own_buf, ";qXfer:statictrace:read+");
|
|
strcat (own_buf, ";qXfer:traceframe-info:read+");
|
|
strcat (own_buf, ";EnableDisableTracepoints+");
|
|
strcat (own_buf, ";QTBuffer:size+");
|
|
strcat (own_buf, ";tracenz+");
|
|
}
|
|
|
|
if (target_supports_hardware_single_step ()
|
|
|| target_supports_software_single_step () )
|
|
{
|
|
strcat (own_buf, ";ConditionalBreakpoints+");
|
|
}
|
|
strcat (own_buf, ";BreakpointCommands+");
|
|
|
|
if (target_supports_agent ())
|
|
strcat (own_buf, ";QAgent+");
|
|
|
|
if (the_target->supports_btrace ())
|
|
supported_btrace_packets (own_buf);
|
|
|
|
if (target_supports_stopped_by_sw_breakpoint ())
|
|
strcat (own_buf, ";swbreak+");
|
|
|
|
if (target_supports_stopped_by_hw_breakpoint ())
|
|
strcat (own_buf, ";hwbreak+");
|
|
|
|
if (the_target->supports_pid_to_exec_file ())
|
|
strcat (own_buf, ";qXfer:exec-file:read+");
|
|
|
|
strcat (own_buf, ";vContSupported+");
|
|
|
|
strcat (own_buf, ";QThreadEvents+");
|
|
|
|
strcat (own_buf, ";no-resumed+");
|
|
|
|
if (target_supports_memory_tagging ())
|
|
strcat (own_buf, ";memory-tagging+");
|
|
|
|
/* Reinitialize components as needed for the new connection. */
|
|
hostio_handle_new_gdb_connection ();
|
|
target_handle_new_gdb_connection ();
|
|
|
|
return;
|
|
}
|
|
|
|
/* Thread-local storage support. */
|
|
if (the_target->supports_get_tls_address ()
|
|
&& startswith (own_buf, "qGetTLSAddr:"))
|
|
{
|
|
char *p = own_buf + 12;
|
|
CORE_ADDR parts[2], address = 0;
|
|
int i, err;
|
|
ptid_t ptid = null_ptid;
|
|
|
|
require_running_or_return (own_buf);
|
|
|
|
for (i = 0; i < 3; i++)
|
|
{
|
|
char *p2;
|
|
int len;
|
|
|
|
if (p == NULL)
|
|
break;
|
|
|
|
p2 = strchr (p, ',');
|
|
if (p2)
|
|
{
|
|
len = p2 - p;
|
|
p2++;
|
|
}
|
|
else
|
|
{
|
|
len = strlen (p);
|
|
p2 = NULL;
|
|
}
|
|
|
|
if (i == 0)
|
|
ptid = read_ptid (p, NULL);
|
|
else
|
|
decode_address (&parts[i - 1], p, len);
|
|
p = p2;
|
|
}
|
|
|
|
if (p != NULL || i < 3)
|
|
err = 1;
|
|
else
|
|
{
|
|
struct thread_info *thread = find_thread_ptid (ptid);
|
|
|
|
if (thread == NULL)
|
|
err = 2;
|
|
else
|
|
err = the_target->get_tls_address (thread, parts[0], parts[1],
|
|
&address);
|
|
}
|
|
|
|
if (err == 0)
|
|
{
|
|
strcpy (own_buf, paddress(address));
|
|
return;
|
|
}
|
|
else if (err > 0)
|
|
{
|
|
write_enn (own_buf);
|
|
return;
|
|
}
|
|
|
|
/* Otherwise, pretend we do not understand this packet. */
|
|
}
|
|
|
|
/* Windows OS Thread Information Block address support. */
|
|
if (the_target->supports_get_tib_address ()
|
|
&& startswith (own_buf, "qGetTIBAddr:"))
|
|
{
|
|
const 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 (startswith (own_buf, "qRcmd,"))
|
|
{
|
|
char *mon = (char *) malloc (PBUFSIZ);
|
|
int len = strlen (own_buf + 6);
|
|
|
|
if (mon == NULL)
|
|
{
|
|
write_enn (own_buf);
|
|
return;
|
|
}
|
|
|
|
if ((len % 2) != 0
|
|
|| hex2bin (own_buf + 6, (gdb_byte *) mon, len / 2) != len / 2)
|
|
{
|
|
write_enn (own_buf);
|
|
free (mon);
|
|
return;
|
|
}
|
|
mon[len / 2] = '\0';
|
|
|
|
write_ok (own_buf);
|
|
|
|
if (the_target->handle_monitor_command (mon) == 0)
|
|
/* Default processing. */
|
|
handle_monitor_command (mon, own_buf);
|
|
|
|
free (mon);
|
|
return;
|
|
}
|
|
|
|
if (startswith (own_buf, "qSearch:memory:"))
|
|
{
|
|
require_running_or_return (own_buf);
|
|
handle_search_memory (own_buf, packet_len);
|
|
return;
|
|
}
|
|
|
|
if (strcmp (own_buf, "qAttached") == 0
|
|
|| startswith (own_buf, "qAttached:"))
|
|
{
|
|
struct process_info *process;
|
|
|
|
if (own_buf[sizeof ("qAttached") - 1])
|
|
{
|
|
int pid = strtoul (own_buf + sizeof ("qAttached:") - 1, NULL, 16);
|
|
process = find_process_pid (pid);
|
|
}
|
|
else
|
|
{
|
|
require_running_or_return (own_buf);
|
|
process = current_process ();
|
|
}
|
|
|
|
if (process == NULL)
|
|
{
|
|
write_enn (own_buf);
|
|
return;
|
|
}
|
|
|
|
strcpy (own_buf, process->attached ? "1" : "0");
|
|
return;
|
|
}
|
|
|
|
if (startswith (own_buf, "qCRC:"))
|
|
{
|
|
/* CRC check (compare-section). */
|
|
const char *comma;
|
|
ULONGEST base;
|
|
int len;
|
|
unsigned long long crc;
|
|
|
|
require_running_or_return (own_buf);
|
|
comma = unpack_varlen_hex (own_buf + 5, &base);
|
|
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;
|
|
|
|
/* Handle fetch memory tags packets. */
|
|
if (startswith (own_buf, "qMemTags:")
|
|
&& target_supports_memory_tagging ())
|
|
{
|
|
gdb::byte_vector tags;
|
|
CORE_ADDR addr = 0;
|
|
size_t len = 0;
|
|
int type = 0;
|
|
|
|
require_running_or_return (own_buf);
|
|
|
|
parse_fetch_memtags_request (own_buf, &addr, &len, &type);
|
|
|
|
bool ret = the_target->fetch_memtags (addr, len, tags, type);
|
|
|
|
if (ret)
|
|
ret = create_fetch_memtags_reply (own_buf, tags);
|
|
|
|
if (!ret)
|
|
write_enn (own_buf);
|
|
|
|
*new_packet_len_p = strlen (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);
|
|
static void resume (struct thread_resume *actions, size_t n);
|
|
|
|
/* The callback that is passed to visit_actioned_threads. */
|
|
typedef int (visit_actioned_threads_callback_ftype)
|
|
(const struct thread_resume *, struct thread_info *);
|
|
|
|
/* Call CALLBACK for any thread to which ACTIONS applies to. Returns
|
|
true if CALLBACK returns true. Returns false if no matching thread
|
|
is found or CALLBACK results false.
|
|
Note: This function is itself a callback for find_thread. */
|
|
|
|
static bool
|
|
visit_actioned_threads (thread_info *thread,
|
|
const struct thread_resume *actions,
|
|
size_t num_actions,
|
|
visit_actioned_threads_callback_ftype *callback)
|
|
{
|
|
for (size_t i = 0; i < num_actions; i++)
|
|
{
|
|
const struct thread_resume *action = &actions[i];
|
|
|
|
if (action->thread == minus_one_ptid
|
|
|| action->thread == thread->id
|
|
|| ((action->thread.pid ()
|
|
== thread->id.pid ())
|
|
&& action->thread.lwp () == -1))
|
|
{
|
|
if ((*callback) (action, thread))
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/* Callback for visit_actioned_threads. If the thread has a pending
|
|
status to report, report it now. */
|
|
|
|
static int
|
|
handle_pending_status (const struct thread_resume *resumption,
|
|
struct thread_info *thread)
|
|
{
|
|
client_state &cs = get_client_state ();
|
|
if (thread->status_pending_p)
|
|
{
|
|
thread->status_pending_p = 0;
|
|
|
|
cs.last_status = thread->last_status;
|
|
cs.last_ptid = thread->id;
|
|
prepare_resume_reply (cs.own_buf, cs.last_ptid, cs.last_status);
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* Parse vCont packets. */
|
|
static void
|
|
handle_v_cont (char *own_buf)
|
|
{
|
|
const char *p;
|
|
int n = 0, i = 0;
|
|
struct thread_resume *resume_info;
|
|
struct thread_resume default_action { null_ptid };
|
|
|
|
/* Count the number of semicolons in the packet. There should be one
|
|
for every action. */
|
|
p = &own_buf[5];
|
|
while (p)
|
|
{
|
|
n++;
|
|
p++;
|
|
p = strchr (p, ';');
|
|
}
|
|
|
|
resume_info = (struct thread_resume *) malloc (n * sizeof (resume_info[0]));
|
|
if (resume_info == NULL)
|
|
goto err;
|
|
|
|
p = &own_buf[5];
|
|
while (*p)
|
|
{
|
|
p++;
|
|
|
|
memset (&resume_info[i], 0, sizeof resume_info[i]);
|
|
|
|
if (p[0] == 's' || p[0] == 'S')
|
|
resume_info[i].kind = resume_step;
|
|
else if (p[0] == 'r')
|
|
resume_info[i].kind = resume_step;
|
|
else if (p[0] == 'c' || p[0] == 'C')
|
|
resume_info[i].kind = resume_continue;
|
|
else if (p[0] == 't')
|
|
resume_info[i].kind = resume_stop;
|
|
else
|
|
goto err;
|
|
|
|
if (p[0] == 'S' || p[0] == 'C')
|
|
{
|
|
char *q;
|
|
int sig = strtol (p + 1, &q, 16);
|
|
if (p == q)
|
|
goto err;
|
|
p = q;
|
|
|
|
if (!gdb_signal_to_host_p ((enum gdb_signal) sig))
|
|
goto err;
|
|
resume_info[i].sig = gdb_signal_to_host ((enum gdb_signal) sig);
|
|
}
|
|
else if (p[0] == 'r')
|
|
{
|
|
ULONGEST addr;
|
|
|
|
p = unpack_varlen_hex (p + 1, &addr);
|
|
resume_info[i].step_range_start = addr;
|
|
|
|
if (*p != ',')
|
|
goto err;
|
|
|
|
p = unpack_varlen_hex (p + 1, &addr);
|
|
resume_info[i].step_range_end = addr;
|
|
}
|
|
else
|
|
{
|
|
p = p + 1;
|
|
}
|
|
|
|
if (p[0] == 0)
|
|
{
|
|
resume_info[i].thread = minus_one_ptid;
|
|
default_action = resume_info[i];
|
|
|
|
/* Note: we don't increment i here, we'll overwrite this entry
|
|
the next time through. */
|
|
}
|
|
else if (p[0] == ':')
|
|
{
|
|
const char *q;
|
|
ptid_t ptid = read_ptid (p + 1, &q);
|
|
|
|
if (p == q)
|
|
goto err;
|
|
p = q;
|
|
if (p[0] != ';' && p[0] != 0)
|
|
goto err;
|
|
|
|
resume_info[i].thread = ptid;
|
|
|
|
i++;
|
|
}
|
|
}
|
|
|
|
if (i < n)
|
|
resume_info[i] = default_action;
|
|
|
|
resume (resume_info, n);
|
|
free (resume_info);
|
|
return;
|
|
|
|
err:
|
|
write_enn (own_buf);
|
|
free (resume_info);
|
|
return;
|
|
}
|
|
|
|
/* Resume target with ACTIONS, an array of NUM_ACTIONS elements. */
|
|
|
|
static void
|
|
resume (struct thread_resume *actions, size_t num_actions)
|
|
{
|
|
client_state &cs = get_client_state ();
|
|
if (!non_stop)
|
|
{
|
|
/* Check if among the threads that GDB wants actioned, there's
|
|
one with a pending status to report. If so, skip actually
|
|
resuming/stopping and report the pending event
|
|
immediately. */
|
|
|
|
thread_info *thread_with_status = find_thread ([&] (thread_info *thread)
|
|
{
|
|
return visit_actioned_threads (thread, actions, num_actions,
|
|
handle_pending_status);
|
|
});
|
|
|
|
if (thread_with_status != NULL)
|
|
return;
|
|
|
|
enable_async_io ();
|
|
}
|
|
|
|
the_target->resume (actions, num_actions);
|
|
|
|
if (non_stop)
|
|
write_ok (cs.own_buf);
|
|
else
|
|
{
|
|
cs.last_ptid = mywait (minus_one_ptid, &cs.last_status, 0, 1);
|
|
|
|
if (cs.last_status.kind () == TARGET_WAITKIND_NO_RESUMED
|
|
&& !report_no_resumed)
|
|
{
|
|
/* The client does not support this stop reply. At least
|
|
return error. */
|
|
sprintf (cs.own_buf, "E.No unwaited-for children left.");
|
|
disable_async_io ();
|
|
return;
|
|
}
|
|
|
|
if (cs.last_status.kind () != TARGET_WAITKIND_EXITED
|
|
&& cs.last_status.kind () != TARGET_WAITKIND_SIGNALLED
|
|
&& cs.last_status.kind () != TARGET_WAITKIND_NO_RESUMED)
|
|
current_thread->last_status = cs.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 (cs.own_buf, cs.last_ptid, cs.last_status);
|
|
disable_async_io ();
|
|
|
|
if (cs.last_status.kind () == TARGET_WAITKIND_EXITED
|
|
|| cs.last_status.kind () == TARGET_WAITKIND_SIGNALLED)
|
|
target_mourn_inferior (cs.last_ptid);
|
|
}
|
|
}
|
|
|
|
/* Attach to a new program. */
|
|
static void
|
|
handle_v_attach (char *own_buf)
|
|
{
|
|
client_state &cs = get_client_state ();
|
|
int pid;
|
|
|
|
pid = strtol (own_buf + 8, NULL, 16);
|
|
if (pid != 0 && attach_inferior (pid) == 0)
|
|
{
|
|
/* Don't report shared library events after attaching, even if
|
|
some libraries are preloaded. GDB will always poll the
|
|
library list. Avoids the "stopped by shared library event"
|
|
notice on the GDB side. */
|
|
current_process ()->dlls_changed = false;
|
|
|
|
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, cs.last_ptid, cs.last_status);
|
|
}
|
|
else
|
|
write_enn (own_buf);
|
|
}
|
|
|
|
/* Run a new program. */
|
|
static void
|
|
handle_v_run (char *own_buf)
|
|
{
|
|
client_state &cs = get_client_state ();
|
|
char *p, *next_p;
|
|
std::vector<char *> new_argv;
|
|
char *new_program_name = NULL;
|
|
int i;
|
|
|
|
for (i = 0, p = own_buf + strlen ("vRun;"); *p; p = next_p, ++i)
|
|
{
|
|
next_p = strchr (p, ';');
|
|
if (next_p == NULL)
|
|
next_p = p + strlen (p);
|
|
|
|
if (i == 0 && p == next_p)
|
|
{
|
|
/* No program specified. */
|
|
new_program_name = NULL;
|
|
}
|
|
else if (p == next_p)
|
|
{
|
|
/* Empty argument. */
|
|
new_argv.push_back (xstrdup (""));
|
|
}
|
|
else
|
|
{
|
|
size_t len = (next_p - p) / 2;
|
|
/* ARG is the unquoted argument received via the RSP. */
|
|
char *arg = (char *) xmalloc (len + 1);
|
|
/* FULL_ARGS will contain the quoted version of ARG. */
|
|
char *full_arg = (char *) xmalloc ((len + 1) * 2);
|
|
/* These are pointers used to navigate the strings above. */
|
|
char *tmp_arg = arg;
|
|
char *tmp_full_arg = full_arg;
|
|
int need_quote = 0;
|
|
|
|
hex2bin (p, (gdb_byte *) arg, len);
|
|
arg[len] = '\0';
|
|
|
|
while (*tmp_arg != '\0')
|
|
{
|
|
switch (*tmp_arg)
|
|
{
|
|
case '\n':
|
|
/* Quote \n. */
|
|
*tmp_full_arg = '\'';
|
|
++tmp_full_arg;
|
|
need_quote = 1;
|
|
break;
|
|
|
|
case '\'':
|
|
/* Quote single quote. */
|
|
*tmp_full_arg = '\\';
|
|
++tmp_full_arg;
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
*tmp_full_arg = *tmp_arg;
|
|
++tmp_full_arg;
|
|
++tmp_arg;
|
|
}
|
|
|
|
if (need_quote)
|
|
*tmp_full_arg++ = '\'';
|
|
|
|
/* Finish FULL_ARG and push it into the vector containing
|
|
the argv. */
|
|
*tmp_full_arg = '\0';
|
|
if (i == 0)
|
|
new_program_name = full_arg;
|
|
else
|
|
new_argv.push_back (full_arg);
|
|
xfree (arg);
|
|
}
|
|
if (*next_p)
|
|
next_p++;
|
|
}
|
|
|
|
if (new_program_name == NULL)
|
|
{
|
|
/* GDB didn't specify a program to run. Use the program from the
|
|
last run with the new argument list. */
|
|
if (program_path.get () == NULL)
|
|
{
|
|
write_enn (own_buf);
|
|
free_vector_argv (new_argv);
|
|
return;
|
|
}
|
|
}
|
|
else
|
|
program_path.set (new_program_name);
|
|
|
|
/* Free the old argv and install the new one. */
|
|
free_vector_argv (program_args);
|
|
program_args = new_argv;
|
|
|
|
target_create_inferior (program_path.get (), program_args);
|
|
|
|
if (cs.last_status.kind () == TARGET_WAITKIND_STOPPED)
|
|
{
|
|
prepare_resume_reply (own_buf, cs.last_ptid, cs.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)
|
|
cs.general_thread = cs.last_ptid;
|
|
}
|
|
else
|
|
write_enn (own_buf);
|
|
}
|
|
|
|
/* Kill process. */
|
|
static void
|
|
handle_v_kill (char *own_buf)
|
|
{
|
|
client_state &cs = get_client_state ();
|
|
int pid;
|
|
char *p = &own_buf[6];
|
|
if (cs.multi_process)
|
|
pid = strtol (p, NULL, 16);
|
|
else
|
|
pid = signal_pid;
|
|
|
|
process_info *proc = find_process_pid (pid);
|
|
|
|
if (proc != nullptr && kill_inferior (proc) == 0)
|
|
{
|
|
cs.last_status.set_signalled (GDB_SIGNAL_KILL);
|
|
cs.last_ptid = ptid_t (pid);
|
|
discard_queued_stop_replies (cs.last_ptid);
|
|
write_ok (own_buf);
|
|
}
|
|
else
|
|
write_enn (own_buf);
|
|
}
|
|
|
|
/* Handle all of the extended 'v' packets. */
|
|
void
|
|
handle_v_requests (char *own_buf, int packet_len, int *new_packet_len)
|
|
{
|
|
client_state &cs = get_client_state ();
|
|
if (!disable_packet_vCont)
|
|
{
|
|
if (strcmp (own_buf, "vCtrlC") == 0)
|
|
{
|
|
the_target->request_interrupt ();
|
|
write_ok (own_buf);
|
|
return;
|
|
}
|
|
|
|
if (startswith (own_buf, "vCont;"))
|
|
{
|
|
handle_v_cont (own_buf);
|
|
return;
|
|
}
|
|
|
|
if (startswith (own_buf, "vCont?"))
|
|
{
|
|
strcpy (own_buf, "vCont;c;C;t");
|
|
|
|
if (target_supports_hardware_single_step ()
|
|
|| target_supports_software_single_step ()
|
|
|| !cs.vCont_supported)
|
|
{
|
|
/* If target supports single step either by hardware or by
|
|
software, add actions s and S to the list of supported
|
|
actions. On the other hand, if GDB doesn't request the
|
|
supported vCont actions in qSupported packet, add s and
|
|
S to the list too. */
|
|
own_buf = own_buf + strlen (own_buf);
|
|
strcpy (own_buf, ";s;S");
|
|
}
|
|
|
|
if (target_supports_range_stepping ())
|
|
{
|
|
own_buf = own_buf + strlen (own_buf);
|
|
strcpy (own_buf, ";r");
|
|
}
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (startswith (own_buf, "vFile:")
|
|
&& handle_vFile (own_buf, packet_len, new_packet_len))
|
|
return;
|
|
|
|
if (startswith (own_buf, "vAttach;"))
|
|
{
|
|
if ((!extended_protocol || !cs.multi_process) && target_running ())
|
|
{
|
|
fprintf (stderr, "Already debugging a process\n");
|
|
write_enn (own_buf);
|
|
return;
|
|
}
|
|
handle_v_attach (own_buf);
|
|
return;
|
|
}
|
|
|
|
if (startswith (own_buf, "vRun;"))
|
|
{
|
|
if ((!extended_protocol || !cs.multi_process) && target_running ())
|
|
{
|
|
fprintf (stderr, "Already debugging a process\n");
|
|
write_enn (own_buf);
|
|
return;
|
|
}
|
|
handle_v_run (own_buf);
|
|
return;
|
|
}
|
|
|
|
if (startswith (own_buf, "vKill;"))
|
|
{
|
|
if (!target_running ())
|
|
{
|
|
fprintf (stderr, "No process to kill\n");
|
|
write_enn (own_buf);
|
|
return;
|
|
}
|
|
handle_v_kill (own_buf);
|
|
return;
|
|
}
|
|
|
|
if (handle_notif_ack (own_buf, packet_len))
|
|
return;
|
|
|
|
/* Otherwise we didn't know what packet it was. Say we didn't
|
|
understand it. */
|
|
own_buf[0] = 0;
|
|
return;
|
|
}
|
|
|
|
/* Resume thread and wait for another event. In non-stop mode,
|
|
don't really wait here, but return immediately to the event
|
|
loop. */
|
|
static void
|
|
myresume (char *own_buf, int step, int sig)
|
|
{
|
|
client_state &cs = get_client_state ();
|
|
struct thread_resume resume_info[2];
|
|
int n = 0;
|
|
int valid_cont_thread;
|
|
|
|
valid_cont_thread = (cs.cont_thread != null_ptid
|
|
&& cs.cont_thread != minus_one_ptid);
|
|
|
|
if (step || sig || valid_cont_thread)
|
|
{
|
|
resume_info[0].thread = current_ptid;
|
|
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 = minus_one_ptid;
|
|
resume_info[n].kind = resume_continue;
|
|
resume_info[n].sig = 0;
|
|
n++;
|
|
}
|
|
|
|
resume (resume_info, n);
|
|
}
|
|
|
|
/* Callback for for_each_thread. Make a new stop reply for each
|
|
stopped thread. */
|
|
|
|
static void
|
|
queue_stop_reply_callback (thread_info *thread)
|
|
{
|
|
/* For now, assume targets that don't have this callback also don't
|
|
manage the thread's last_status field. */
|
|
if (!the_target->supports_thread_stopped ())
|
|
{
|
|
struct vstop_notif *new_notif = new struct vstop_notif;
|
|
|
|
new_notif->ptid = thread->id;
|
|
new_notif->status = thread->last_status;
|
|
/* Pass the last stop reply back to GDB, but don't notify
|
|
yet. */
|
|
notif_event_enque (¬if_stop, new_notif);
|
|
}
|
|
else
|
|
{
|
|
if (target_thread_stopped (thread))
|
|
{
|
|
threads_debug_printf
|
|
("Reporting thread %s as already stopped with %s",
|
|
target_pid_to_str (thread->id).c_str (),
|
|
thread->last_status.to_string ().c_str ());
|
|
|
|
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 (thread->id, thread->last_status);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* 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 (thread_info *thread)
|
|
{
|
|
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.set_stopped (GDB_SIGNAL_0);
|
|
}
|
|
}
|
|
|
|
/* Set all threads' states as "want-stopped". */
|
|
|
|
static void
|
|
gdb_wants_all_threads_stopped (void)
|
|
{
|
|
for_each_thread (gdb_wants_thread_stopped);
|
|
}
|
|
|
|
/* Callback for for_each_thread. If the thread is stopped with an
|
|
interesting event, mark it as having a pending event. */
|
|
|
|
static void
|
|
set_pending_status_callback (thread_info *thread)
|
|
{
|
|
if (thread->last_status.kind () != TARGET_WAITKIND_STOPPED
|
|
|| (thread->last_status.sig () != GDB_SIGNAL_0
|
|
/* A breakpoint, watchpoint or finished step from a previous
|
|
GDB run isn't considered interesting for a new GDB run.
|
|
If we left those pending, the new GDB could consider them
|
|
random SIGTRAPs. This leaves out real async traps. We'd
|
|
have to peek into the (target-specific) siginfo to
|
|
distinguish those. */
|
|
&& thread->last_status.sig () != GDB_SIGNAL_TRAP))
|
|
thread->status_pending_p = 1;
|
|
}
|
|
|
|
/* Status handler for the '?' packet. */
|
|
|
|
static void
|
|
handle_status (char *own_buf)
|
|
{
|
|
client_state &cs = get_client_state ();
|
|
|
|
/* GDB is connected, don't forward events to the target anymore. */
|
|
for_each_process ([] (process_info *process) {
|
|
process->gdb_detached = 0;
|
|
});
|
|
|
|
/* 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)
|
|
{
|
|
for_each_thread (queue_stop_reply_callback);
|
|
|
|
/* 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). */
|
|
notif_write_event (¬if_stop, cs.own_buf);
|
|
}
|
|
else
|
|
{
|
|
thread_info *thread = NULL;
|
|
|
|
target_pause_all (false);
|
|
target_stabilize_threads ();
|
|
gdb_wants_all_threads_stopped ();
|
|
|
|
/* We can only report one status, but we might be coming out of
|
|
non-stop -- if more than one thread is stopped with
|
|
interesting events, leave events for the threads we're not
|
|
reporting now pending. They'll be reported the next time the
|
|
threads are resumed. Start by marking all interesting events
|
|
as pending. */
|
|
for_each_thread (set_pending_status_callback);
|
|
|
|
/* Prefer the last thread that reported an event to GDB (even if
|
|
that was a GDB_SIGNAL_TRAP). */
|
|
if (cs.last_status.kind () != TARGET_WAITKIND_IGNORE
|
|
&& cs.last_status.kind () != TARGET_WAITKIND_EXITED
|
|
&& cs.last_status.kind () != TARGET_WAITKIND_SIGNALLED)
|
|
thread = find_thread_ptid (cs.last_ptid);
|
|
|
|
/* If the last event thread is not found for some reason, look
|
|
for some other thread that might have an event to report. */
|
|
if (thread == NULL)
|
|
thread = find_thread ([] (thread_info *thr_arg)
|
|
{
|
|
return thr_arg->status_pending_p;
|
|
});
|
|
|
|
/* If we're still out of luck, simply pick the first thread in
|
|
the thread list. */
|
|
if (thread == NULL)
|
|
thread = get_first_thread ();
|
|
|
|
if (thread != NULL)
|
|
{
|
|
struct thread_info *tp = (struct thread_info *) thread;
|
|
|
|
/* We're reporting this event, so it's no longer
|
|
pending. */
|
|
tp->status_pending_p = 0;
|
|
|
|
/* GDB assumes the current thread is the thread we're
|
|
reporting the status for. */
|
|
cs.general_thread = thread->id;
|
|
set_desired_thread ();
|
|
|
|
gdb_assert (tp->last_status.kind () != TARGET_WAITKIND_IGNORE);
|
|
prepare_resume_reply (own_buf, tp->id, tp->last_status);
|
|
}
|
|
else
|
|
strcpy (own_buf, "W00");
|
|
}
|
|
}
|
|
|
|
static void
|
|
gdbserver_version (void)
|
|
{
|
|
printf ("GNU gdbserver %s%s\n"
|
|
"Copyright (C) 2023 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);
|
|
}
|
|
|
|
static void
|
|
gdbserver_usage (FILE *stream)
|
|
{
|
|
fprintf (stream, "Usage:\tgdbserver [OPTIONS] COMM PROG [ARGS ...]\n"
|
|
"\tgdbserver [OPTIONS] --attach COMM PID\n"
|
|
"\tgdbserver [OPTIONS] --multi COMM\n"
|
|
"\n"
|
|
"COMM may either be a tty device (for serial debugging),\n"
|
|
"HOST:PORT to listen for a TCP connection, or '-' or 'stdio' to use \n"
|
|
"stdin/stdout of gdbserver.\n"
|
|
"PROG is the executable program. ARGS are arguments passed to inferior.\n"
|
|
"PID is the process ID to attach to, when --attach is specified.\n"
|
|
"\n"
|
|
"Operating modes:\n"
|
|
"\n"
|
|
" --attach Attach to running process PID.\n"
|
|
" --multi Start server without a specific program, and\n"
|
|
" only quit when explicitly commanded.\n"
|
|
" --once Exit after the first connection has closed.\n"
|
|
" --help Print this message and then exit.\n"
|
|
" --version Display version information and exit.\n"
|
|
"\n"
|
|
"Other options:\n"
|
|
"\n"
|
|
" --wrapper WRAPPER -- Run WRAPPER to start new programs.\n"
|
|
" --disable-randomization\n"
|
|
" Run PROG with address space randomization disabled.\n"
|
|
" --no-disable-randomization\n"
|
|
" Don't disable address space randomization when\n"
|
|
" starting PROG.\n"
|
|
" --startup-with-shell\n"
|
|
" Start PROG using a shell. I.e., execs a shell that\n"
|
|
" then execs PROG. (default)\n"
|
|
" --no-startup-with-shell\n"
|
|
" Exec PROG directly instead of using a shell.\n"
|
|
" Disables argument globbing and variable substitution\n"
|
|
" on UNIX-like systems.\n"
|
|
"\n"
|
|
"Debug options:\n"
|
|
"\n"
|
|
" --debug Enable general debugging output.\n"
|
|
" --debug-format=OPT1[,OPT2,...]\n"
|
|
" Specify extra content in debugging output.\n"
|
|
" Options:\n"
|
|
" all\n"
|
|
" none\n"
|
|
" timestamp\n"
|
|
" --remote-debug Enable remote protocol debugging output.\n"
|
|
" --event-loop-debug Enable event loop debugging output.\n"
|
|
" --disable-packet=OPT1[,OPT2,...]\n"
|
|
" Disable support for RSP packets or features.\n"
|
|
" Options:\n"
|
|
" vCont, T, Tthread, qC, qfThreadInfo and \n"
|
|
" threads (disable all threading packets).\n"
|
|
"\n"
|
|
"For more information, consult the GDB manual (available as on-line \n"
|
|
"info or a printed manual).\n");
|
|
if (REPORT_BUGS_TO[0] && stream == stdout)
|
|
fprintf (stream, "Report bugs to \"%s\".\n", REPORT_BUGS_TO);
|
|
}
|
|
|
|
static void
|
|
gdbserver_show_disableable (FILE *stream)
|
|
{
|
|
fprintf (stream, "Disableable packets:\n"
|
|
" 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"
|
|
" threads \tAll of the above\n"
|
|
" T \tAll 'T' packets\n");
|
|
}
|
|
|
|
/* Start up the event loop. This is the entry point to the event
|
|
loop. */
|
|
|
|
static void
|
|
start_event_loop ()
|
|
{
|
|
/* Loop until there is nothing to do. This is the entry point to
|
|
the event loop engine. If nothing is ready at this time, wait
|
|
for something to happen (via wait_for_event), then process it.
|
|
Return when there are no longer event sources to wait for. */
|
|
|
|
keep_processing_events = true;
|
|
while (keep_processing_events)
|
|
{
|
|
/* Any events already waiting in the queue? */
|
|
int res = gdb_do_one_event ();
|
|
|
|
/* Was there an error? */
|
|
if (res == -1)
|
|
break;
|
|
}
|
|
|
|
/* We are done with the event loop. There are no more event sources
|
|
to listen to. So we exit gdbserver. */
|
|
}
|
|
|
|
static void
|
|
kill_inferior_callback (process_info *process)
|
|
{
|
|
kill_inferior (process);
|
|
discard_queued_stop_replies (ptid_t (process->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_process ([] (process_info *process) {
|
|
if (!process->attached)
|
|
fprintf (stderr, " %d", process->pid);
|
|
});
|
|
|
|
fprintf (stderr, "\n");
|
|
}
|
|
if (have_attached_inferiors_p ())
|
|
{
|
|
fprintf (stderr, "Detaching process(es):");
|
|
|
|
for_each_process ([] (process_info *process) {
|
|
if (process->attached)
|
|
fprintf (stderr, " %d", process->pid);
|
|
});
|
|
|
|
fprintf (stderr, "\n");
|
|
}
|
|
|
|
/* Now we can kill or detach the inferiors. */
|
|
for_each_process ([] (process_info *process) {
|
|
int pid = process->pid;
|
|
|
|
if (process->attached)
|
|
detach_inferior (process);
|
|
else
|
|
kill_inferior (process);
|
|
|
|
discard_queued_stop_replies (ptid_t (pid));
|
|
});
|
|
}
|
|
|
|
/* Value that will be passed to exit(3) when gdbserver exits. */
|
|
static int exit_code;
|
|
|
|
/* Wrapper for detach_or_kill_for_exit that catches and prints
|
|
errors. */
|
|
|
|
static void
|
|
detach_or_kill_for_exit_cleanup ()
|
|
{
|
|
try
|
|
{
|
|
detach_or_kill_for_exit ();
|
|
}
|
|
catch (const gdb_exception &exception)
|
|
{
|
|
fflush (stdout);
|
|
fprintf (stderr, "Detach or kill failed: %s\n",
|
|
exception.what ());
|
|
exit_code = 1;
|
|
}
|
|
}
|
|
|
|
#if GDB_SELF_TEST
|
|
|
|
namespace selftests {
|
|
|
|
static void
|
|
test_memory_tagging_functions (void)
|
|
{
|
|
/* Setup testing. */
|
|
gdb::char_vector packet;
|
|
gdb::byte_vector tags, bv;
|
|
std::string expected;
|
|
packet.resize (32000);
|
|
CORE_ADDR addr;
|
|
size_t len;
|
|
int type;
|
|
|
|
/* Test parsing a qMemTags request. */
|
|
|
|
/* Valid request, addr, len and type updated. */
|
|
addr = 0xff;
|
|
len = 255;
|
|
type = 255;
|
|
strcpy (packet.data (), "qMemTags:0,0:0");
|
|
parse_fetch_memtags_request (packet.data (), &addr, &len, &type);
|
|
SELF_CHECK (addr == 0 && len == 0 && type == 0);
|
|
|
|
/* Valid request, addr, len and type updated. */
|
|
addr = 0;
|
|
len = 0;
|
|
type = 0;
|
|
strcpy (packet.data (), "qMemTags:deadbeef,ff:5");
|
|
parse_fetch_memtags_request (packet.data (), &addr, &len, &type);
|
|
SELF_CHECK (addr == 0xdeadbeef && len == 255 && type == 5);
|
|
|
|
/* Test creating a qMemTags reply. */
|
|
|
|
/* Non-empty tag data. */
|
|
bv.resize (0);
|
|
|
|
for (int i = 0; i < 5; i++)
|
|
bv.push_back (i);
|
|
|
|
expected = "m0001020304";
|
|
SELF_CHECK (create_fetch_memtags_reply (packet.data (), bv) == true);
|
|
SELF_CHECK (strcmp (packet.data (), expected.c_str ()) == 0);
|
|
|
|
/* Test parsing a QMemTags request. */
|
|
|
|
/* Valid request and empty tag data: addr, len, type and tags updated. */
|
|
addr = 0xff;
|
|
len = 255;
|
|
type = 255;
|
|
tags.resize (5);
|
|
strcpy (packet.data (), "QMemTags:0,0:0:");
|
|
SELF_CHECK (parse_store_memtags_request (packet.data (),
|
|
&addr, &len, tags, &type) == true);
|
|
SELF_CHECK (addr == 0 && len == 0 && type == 0 && tags.size () == 0);
|
|
|
|
/* Valid request and non-empty tag data: addr, len, type
|
|
and tags updated. */
|
|
addr = 0;
|
|
len = 0;
|
|
type = 0;
|
|
tags.resize (0);
|
|
strcpy (packet.data (),
|
|
"QMemTags:deadbeef,ff:5:0001020304");
|
|
SELF_CHECK (parse_store_memtags_request (packet.data (), &addr, &len, tags,
|
|
&type) == true);
|
|
SELF_CHECK (addr == 0xdeadbeef && len == 255 && type == 5
|
|
&& tags.size () == 5);
|
|
}
|
|
|
|
} // namespace selftests
|
|
#endif /* GDB_SELF_TEST */
|
|
|
|
/* Main function. This is called by the real "main" function,
|
|
wrapped in a TRY_CATCH that handles any uncaught exceptions. */
|
|
|
|
static void ATTRIBUTE_NORETURN
|
|
captured_main (int argc, char *argv[])
|
|
{
|
|
int bad_attach;
|
|
int pid;
|
|
char *arg_end;
|
|
const char *port = NULL;
|
|
char **next_arg = &argv[1];
|
|
volatile int multi_mode = 0;
|
|
volatile int attach = 0;
|
|
int was_running;
|
|
bool selftest = false;
|
|
#if GDB_SELF_TEST
|
|
std::vector<const char *> selftest_filters;
|
|
|
|
selftests::register_test ("remote_memory_tagging",
|
|
selftests::test_memory_tagging_functions);
|
|
#endif
|
|
|
|
current_directory = getcwd (NULL, 0);
|
|
client_state &cs = get_client_state ();
|
|
|
|
if (current_directory == NULL)
|
|
{
|
|
error (_("Could not find current working directory: %s"),
|
|
safe_strerror (errno));
|
|
}
|
|
|
|
while (*next_arg != NULL && **next_arg == '-')
|
|
{
|
|
if (strcmp (*next_arg, "--version") == 0)
|
|
{
|
|
gdbserver_version ();
|
|
exit (0);
|
|
}
|
|
else if (strcmp (*next_arg, "--help") == 0)
|
|
{
|
|
gdbserver_usage (stdout);
|
|
exit (0);
|
|
}
|
|
else if (strcmp (*next_arg, "--attach") == 0)
|
|
attach = 1;
|
|
else if (strcmp (*next_arg, "--multi") == 0)
|
|
multi_mode = 1;
|
|
else if (strcmp (*next_arg, "--wrapper") == 0)
|
|
{
|
|
char **tmp;
|
|
|
|
next_arg++;
|
|
|
|
tmp = next_arg;
|
|
while (*next_arg != NULL && strcmp (*next_arg, "--") != 0)
|
|
{
|
|
wrapper_argv += *next_arg;
|
|
wrapper_argv += ' ';
|
|
next_arg++;
|
|
}
|
|
|
|
if (!wrapper_argv.empty ())
|
|
{
|
|
/* Erase the last whitespace. */
|
|
wrapper_argv.erase (wrapper_argv.end () - 1);
|
|
}
|
|
|
|
if (next_arg == tmp || *next_arg == NULL)
|
|
{
|
|
gdbserver_usage (stderr);
|
|
exit (1);
|
|
}
|
|
|
|
/* Consume the "--". */
|
|
*next_arg = NULL;
|
|
}
|
|
else if (strcmp (*next_arg, "--debug") == 0)
|
|
debug_threads = true;
|
|
else if (startswith (*next_arg, "--debug-format="))
|
|
{
|
|
std::string error_msg
|
|
= parse_debug_format_options ((*next_arg)
|
|
+ sizeof ("--debug-format=") - 1, 0);
|
|
|
|
if (!error_msg.empty ())
|
|
{
|
|
fprintf (stderr, "%s", error_msg.c_str ());
|
|
exit (1);
|
|
}
|
|
}
|
|
else if (strcmp (*next_arg, "--remote-debug") == 0)
|
|
remote_debug = true;
|
|
else if (strcmp (*next_arg, "--event-loop-debug") == 0)
|
|
debug_event_loop = debug_event_loop_kind::ALL;
|
|
else if (startswith (*next_arg, "--debug-file="))
|
|
debug_set_output ((*next_arg) + sizeof ("--debug-file=") -1);
|
|
else if (strcmp (*next_arg, "--disable-packet") == 0)
|
|
{
|
|
gdbserver_show_disableable (stdout);
|
|
exit (0);
|
|
}
|
|
else if (startswith (*next_arg, "--disable-packet="))
|
|
{
|
|
char *packets = *next_arg += sizeof ("--disable-packet=") - 1;
|
|
char *saveptr;
|
|
for (char *tok = strtok_r (packets, ",", &saveptr);
|
|
tok != NULL;
|
|
tok = strtok_r (NULL, ",", &saveptr))
|
|
{
|
|
if (strcmp ("vCont", tok) == 0)
|
|
disable_packet_vCont = true;
|
|
else if (strcmp ("Tthread", tok) == 0)
|
|
disable_packet_Tthread = true;
|
|
else if (strcmp ("qC", tok) == 0)
|
|
disable_packet_qC = true;
|
|
else if (strcmp ("qfThreadInfo", tok) == 0)
|
|
disable_packet_qfThreadInfo = true;
|
|
else if (strcmp ("T", tok) == 0)
|
|
disable_packet_T = true;
|
|
else if (strcmp ("threads", tok) == 0)
|
|
{
|
|
disable_packet_vCont = true;
|
|
disable_packet_Tthread = true;
|
|
disable_packet_qC = true;
|
|
disable_packet_qfThreadInfo = true;
|
|
}
|
|
else
|
|
{
|
|
fprintf (stderr, "Don't know how to disable \"%s\".\n\n",
|
|
tok);
|
|
gdbserver_show_disableable (stderr);
|
|
exit (1);
|
|
}
|
|
}
|
|
}
|
|
else if (strcmp (*next_arg, "-") == 0)
|
|
{
|
|
/* "-" specifies a stdio connection and is a form of port
|
|
specification. */
|
|
port = STDIO_CONNECTION_NAME;
|
|
next_arg++;
|
|
break;
|
|
}
|
|
else if (strcmp (*next_arg, "--disable-randomization") == 0)
|
|
cs.disable_randomization = 1;
|
|
else if (strcmp (*next_arg, "--no-disable-randomization") == 0)
|
|
cs.disable_randomization = 0;
|
|
else if (strcmp (*next_arg, "--startup-with-shell") == 0)
|
|
startup_with_shell = true;
|
|
else if (strcmp (*next_arg, "--no-startup-with-shell") == 0)
|
|
startup_with_shell = false;
|
|
else if (strcmp (*next_arg, "--once") == 0)
|
|
run_once = true;
|
|
else if (strcmp (*next_arg, "--selftest") == 0)
|
|
selftest = true;
|
|
else if (startswith (*next_arg, "--selftest="))
|
|
{
|
|
selftest = true;
|
|
|
|
#if GDB_SELF_TEST
|
|
const char *filter = *next_arg + strlen ("--selftest=");
|
|
if (*filter == '\0')
|
|
{
|
|
fprintf (stderr, _("Error: selftest filter is empty.\n"));
|
|
exit (1);
|
|
}
|
|
|
|
selftest_filters.push_back (filter);
|
|
#endif
|
|
}
|
|
else
|
|
{
|
|
fprintf (stderr, "Unknown argument: %s\n", *next_arg);
|
|
exit (1);
|
|
}
|
|
|
|
next_arg++;
|
|
continue;
|
|
}
|
|
|
|
if (port == NULL)
|
|
{
|
|
port = *next_arg;
|
|
next_arg++;
|
|
}
|
|
if ((port == NULL || (!attach && !multi_mode && *next_arg == NULL))
|
|
&& !selftest)
|
|
{
|
|
gdbserver_usage (stderr);
|
|
exit (1);
|
|
}
|
|
|
|
/* Remember stdio descriptors. LISTEN_DESC must not be listed, it will be
|
|
opened by remote_prepare. */
|
|
notice_open_fds ();
|
|
|
|
save_original_signals_state (false);
|
|
|
|
/* We need to know whether the remote connection is stdio before
|
|
starting the inferior. Inferiors created in this scenario have
|
|
stdin,stdout redirected. So do this here before we call
|
|
start_inferior. */
|
|
if (port != NULL)
|
|
remote_prepare (port);
|
|
|
|
bad_attach = 0;
|
|
pid = 0;
|
|
|
|
/* --attach used to come after PORT, so allow it there for
|
|
compatibility. */
|
|
if (*next_arg != NULL && strcmp (*next_arg, "--attach") == 0)
|
|
{
|
|
attach = 1;
|
|
next_arg++;
|
|
}
|
|
|
|
if (attach
|
|
&& (*next_arg == NULL
|
|
|| (*next_arg)[0] == '\0'
|
|
|| (pid = strtoul (*next_arg, &arg_end, 0)) == 0
|
|
|| *arg_end != '\0'
|
|
|| next_arg[1] != NULL))
|
|
bad_attach = 1;
|
|
|
|
if (bad_attach)
|
|
{
|
|
gdbserver_usage (stderr);
|
|
exit (1);
|
|
}
|
|
|
|
/* Gather information about the environment. */
|
|
our_environ = gdb_environ::from_host_environ ();
|
|
|
|
initialize_async_io ();
|
|
initialize_low ();
|
|
have_job_control ();
|
|
if (target_supports_tracepoints ())
|
|
initialize_tracepoint ();
|
|
|
|
mem_buf = (unsigned char *) xmalloc (PBUFSIZ);
|
|
|
|
if (selftest)
|
|
{
|
|
#if GDB_SELF_TEST
|
|
selftests::run_tests (selftest_filters);
|
|
#else
|
|
printf (_("Selftests have been disabled for this build.\n"));
|
|
#endif
|
|
throw_quit ("Quit");
|
|
}
|
|
|
|
if (pid == 0 && *next_arg != NULL)
|
|
{
|
|
int i, n;
|
|
|
|
n = argc - (next_arg - argv);
|
|
program_path.set (next_arg[0]);
|
|
for (i = 1; i < n; i++)
|
|
program_args.push_back (xstrdup (next_arg[i]));
|
|
|
|
/* Wait till we are at first instruction in program. */
|
|
target_create_inferior (program_path.get (), program_args);
|
|
|
|
/* We are now (hopefully) stopped at the first instruction of
|
|
the target process. This assumes that the target process was
|
|
successfully created. */
|
|
}
|
|
else if (pid != 0)
|
|
{
|
|
if (attach_inferior (pid) == -1)
|
|
error ("Attaching not supported on this target");
|
|
|
|
/* Otherwise succeeded. */
|
|
}
|
|
else
|
|
{
|
|
cs.last_status.set_exited (0);
|
|
cs.last_ptid = minus_one_ptid;
|
|
}
|
|
|
|
SCOPE_EXIT { detach_or_kill_for_exit_cleanup (); };
|
|
|
|
/* Don't report shared library events on the initial connection,
|
|
even if some libraries are preloaded. Avoids the "stopped by
|
|
shared library event" notice on gdb side. */
|
|
if (current_thread != nullptr)
|
|
current_process ()->dlls_changed = false;
|
|
|
|
if (cs.last_status.kind () == TARGET_WAITKIND_EXITED
|
|
|| cs.last_status.kind () == TARGET_WAITKIND_SIGNALLED)
|
|
was_running = 0;
|
|
else
|
|
was_running = 1;
|
|
|
|
if (!was_running && !multi_mode)
|
|
error ("No program to debug");
|
|
|
|
while (1)
|
|
{
|
|
cs.noack_mode = 0;
|
|
cs.multi_process = 0;
|
|
cs.report_fork_events = 0;
|
|
cs.report_vfork_events = 0;
|
|
cs.report_exec_events = 0;
|
|
/* Be sure we're out of tfind mode. */
|
|
cs.current_traceframe = -1;
|
|
cs.cont_thread = null_ptid;
|
|
cs.swbreak_feature = 0;
|
|
cs.hwbreak_feature = 0;
|
|
cs.vCont_supported = 0;
|
|
cs.memory_tagging_feature = false;
|
|
|
|
remote_open (port);
|
|
|
|
try
|
|
{
|
|
/* 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. */
|
|
if (exit_requested)
|
|
throw_quit ("Quit");
|
|
|
|
/* The only other way to get here is for getpkt to fail:
|
|
|
|
- If --once was specified, we're done.
|
|
|
|
- If not in extended-remote mode, and we're no longer
|
|
debugging anything, simply exit: GDB has disconnected
|
|
after processing the last process exit.
|
|
|
|
- Otherwise, close the connection and reopen it at the
|
|
top of the loop. */
|
|
if (run_once || (!extended_protocol && !target_running ()))
|
|
throw_quit ("Quit");
|
|
|
|
fprintf (stderr,
|
|
"Remote side has terminated connection. "
|
|
"GDBserver will reopen the connection.\n");
|
|
|
|
/* Get rid of any pending statuses. An eventual reconnection
|
|
(by the same GDB instance or another) will refresh all its
|
|
state from scratch. */
|
|
discard_queued_stop_replies (minus_one_ptid);
|
|
for_each_thread ([] (thread_info *thread)
|
|
{
|
|
thread->status_pending_p = 0;
|
|
});
|
|
|
|
if (tracing)
|
|
{
|
|
if (disconnected_tracing)
|
|
{
|
|
/* 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)
|
|
{
|
|
if (the_target->start_non_stop (true))
|
|
non_stop = 1;
|
|
|
|
/* Detaching implicitly resumes all threads;
|
|
simply disconnecting does not. */
|
|
}
|
|
}
|
|
else
|
|
{
|
|
fprintf (stderr,
|
|
"Disconnected tracing disabled; "
|
|
"stopping trace run.\n");
|
|
stop_tracing ();
|
|
}
|
|
}
|
|
}
|
|
catch (const gdb_exception_error &exception)
|
|
{
|
|
fflush (stdout);
|
|
fprintf (stderr, "gdbserver: %s\n", exception.what ());
|
|
|
|
if (response_needed)
|
|
{
|
|
write_enn (cs.own_buf);
|
|
putpkt (cs.own_buf);
|
|
}
|
|
|
|
if (run_once)
|
|
throw_quit ("Quit");
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Main function. */
|
|
|
|
int
|
|
main (int argc, char *argv[])
|
|
{
|
|
|
|
try
|
|
{
|
|
captured_main (argc, argv);
|
|
}
|
|
catch (const gdb_exception &exception)
|
|
{
|
|
if (exception.reason == RETURN_ERROR)
|
|
{
|
|
fflush (stdout);
|
|
fprintf (stderr, "%s\n", exception.what ());
|
|
fprintf (stderr, "Exiting\n");
|
|
exit_code = 1;
|
|
}
|
|
|
|
exit (exit_code);
|
|
}
|
|
|
|
gdb_assert_not_reached ("captured_main should never return");
|
|
}
|
|
|
|
/* Process options coming from Z packets for a breakpoint. PACKET is
|
|
the packet buffer. *PACKET is updated to point to the first char
|
|
after the last processed option. */
|
|
|
|
static void
|
|
process_point_options (struct gdb_breakpoint *bp, const char **packet)
|
|
{
|
|
const char *dataptr = *packet;
|
|
int persist;
|
|
|
|
/* Check if data has the correct format. */
|
|
if (*dataptr != ';')
|
|
return;
|
|
|
|
dataptr++;
|
|
|
|
while (*dataptr)
|
|
{
|
|
if (*dataptr == ';')
|
|
++dataptr;
|
|
|
|
if (*dataptr == 'X')
|
|
{
|
|
/* Conditional expression. */
|
|
threads_debug_printf ("Found breakpoint condition.");
|
|
if (!add_breakpoint_condition (bp, &dataptr))
|
|
dataptr = strchrnul (dataptr, ';');
|
|
}
|
|
else if (startswith (dataptr, "cmds:"))
|
|
{
|
|
dataptr += strlen ("cmds:");
|
|
threads_debug_printf ("Found breakpoint commands %s.", dataptr);
|
|
persist = (*dataptr == '1');
|
|
dataptr += 2;
|
|
if (add_breakpoint_commands (bp, &dataptr, persist))
|
|
dataptr = strchrnul (dataptr, ';');
|
|
}
|
|
else
|
|
{
|
|
fprintf (stderr, "Unknown token %c, ignoring.\n",
|
|
*dataptr);
|
|
/* Skip tokens until we find one that we recognize. */
|
|
dataptr = strchrnul (dataptr, ';');
|
|
}
|
|
}
|
|
*packet = dataptr;
|
|
}
|
|
|
|
/* 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)
|
|
{
|
|
client_state &cs = get_client_state ();
|
|
int signal;
|
|
unsigned int len;
|
|
CORE_ADDR mem_addr;
|
|
unsigned char sig;
|
|
int packet_len;
|
|
int new_packet_len = -1;
|
|
|
|
disable_async_io ();
|
|
|
|
response_needed = false;
|
|
packet_len = getpkt (cs.own_buf);
|
|
if (packet_len <= 0)
|
|
{
|
|
remote_close ();
|
|
/* Force an event loop break. */
|
|
return -1;
|
|
}
|
|
response_needed = true;
|
|
|
|
char ch = cs.own_buf[0];
|
|
switch (ch)
|
|
{
|
|
case 'q':
|
|
handle_query (cs.own_buf, packet_len, &new_packet_len);
|
|
break;
|
|
case 'Q':
|
|
handle_general_set (cs.own_buf);
|
|
break;
|
|
case 'D':
|
|
handle_detach (cs.own_buf);
|
|
break;
|
|
case '!':
|
|
extended_protocol = true;
|
|
write_ok (cs.own_buf);
|
|
break;
|
|
case '?':
|
|
handle_status (cs.own_buf);
|
|
break;
|
|
case 'H':
|
|
if (cs.own_buf[1] == 'c' || cs.own_buf[1] == 'g' || cs.own_buf[1] == 's')
|
|
{
|
|
require_running_or_break (cs.own_buf);
|
|
|
|
ptid_t thread_id = read_ptid (&cs.own_buf[2], NULL);
|
|
|
|
if (thread_id == null_ptid || thread_id == minus_one_ptid)
|
|
thread_id = null_ptid;
|
|
else if (thread_id.is_pid ())
|
|
{
|
|
/* The ptid represents a pid. */
|
|
thread_info *thread = find_any_thread_of_pid (thread_id.pid ());
|
|
|
|
if (thread == NULL)
|
|
{
|
|
write_enn (cs.own_buf);
|
|
break;
|
|
}
|
|
|
|
thread_id = thread->id;
|
|
}
|
|
else
|
|
{
|
|
/* The ptid represents a lwp/tid. */
|
|
if (find_thread_ptid (thread_id) == NULL)
|
|
{
|
|
write_enn (cs.own_buf);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (cs.own_buf[1] == 'g')
|
|
{
|
|
if (thread_id == null_ptid)
|
|
{
|
|
/* 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. */
|
|
thread_info *thread = find_thread_ptid (cs.general_thread);
|
|
if (thread == NULL)
|
|
thread = get_first_thread ();
|
|
thread_id = thread->id;
|
|
}
|
|
|
|
cs.general_thread = thread_id;
|
|
set_desired_thread ();
|
|
gdb_assert (current_thread != NULL);
|
|
}
|
|
else if (cs.own_buf[1] == 'c')
|
|
cs.cont_thread = thread_id;
|
|
|
|
write_ok (cs.own_buf);
|
|
}
|
|
else
|
|
{
|
|
/* Silently ignore it so that gdb can extend the protocol
|
|
without compatibility headaches. */
|
|
cs.own_buf[0] = '\0';
|
|
}
|
|
break;
|
|
case 'g':
|
|
require_running_or_break (cs.own_buf);
|
|
if (cs.current_traceframe >= 0)
|
|
{
|
|
struct regcache *regcache
|
|
= new_register_cache (current_target_desc ());
|
|
|
|
if (fetch_traceframe_registers (cs.current_traceframe,
|
|
regcache, -1) == 0)
|
|
registers_to_string (regcache, cs.own_buf);
|
|
else
|
|
write_enn (cs.own_buf);
|
|
free_register_cache (regcache);
|
|
}
|
|
else
|
|
{
|
|
struct regcache *regcache;
|
|
|
|
if (!set_desired_thread ())
|
|
write_enn (cs.own_buf);
|
|
else
|
|
{
|
|
regcache = get_thread_regcache (current_thread, 1);
|
|
registers_to_string (regcache, cs.own_buf);
|
|
}
|
|
}
|
|
break;
|
|
case 'G':
|
|
require_running_or_break (cs.own_buf);
|
|
if (cs.current_traceframe >= 0)
|
|
write_enn (cs.own_buf);
|
|
else
|
|
{
|
|
struct regcache *regcache;
|
|
|
|
if (!set_desired_thread ())
|
|
write_enn (cs.own_buf);
|
|
else
|
|
{
|
|
regcache = get_thread_regcache (current_thread, 1);
|
|
registers_from_string (regcache, &cs.own_buf[1]);
|
|
write_ok (cs.own_buf);
|
|
}
|
|
}
|
|
break;
|
|
case 'm':
|
|
{
|
|
require_running_or_break (cs.own_buf);
|
|
decode_m_packet (&cs.own_buf[1], &mem_addr, &len);
|
|
int res = gdb_read_memory (mem_addr, mem_buf, len);
|
|
if (res < 0)
|
|
write_enn (cs.own_buf);
|
|
else
|
|
bin2hex (mem_buf, cs.own_buf, res);
|
|
}
|
|
break;
|
|
case 'M':
|
|
require_running_or_break (cs.own_buf);
|
|
decode_M_packet (&cs.own_buf[1], &mem_addr, &len, &mem_buf);
|
|
if (gdb_write_memory (mem_addr, mem_buf, len) == 0)
|
|
write_ok (cs.own_buf);
|
|
else
|
|
write_enn (cs.own_buf);
|
|
break;
|
|
case 'X':
|
|
require_running_or_break (cs.own_buf);
|
|
if (decode_X_packet (&cs.own_buf[1], packet_len - 1,
|
|
&mem_addr, &len, &mem_buf) < 0
|
|
|| gdb_write_memory (mem_addr, mem_buf, len) != 0)
|
|
write_enn (cs.own_buf);
|
|
else
|
|
write_ok (cs.own_buf);
|
|
break;
|
|
case 'C':
|
|
require_running_or_break (cs.own_buf);
|
|
hex2bin (cs.own_buf + 1, &sig, 1);
|
|
if (gdb_signal_to_host_p ((enum gdb_signal) sig))
|
|
signal = gdb_signal_to_host ((enum gdb_signal) sig);
|
|
else
|
|
signal = 0;
|
|
myresume (cs.own_buf, 0, signal);
|
|
break;
|
|
case 'S':
|
|
require_running_or_break (cs.own_buf);
|
|
hex2bin (cs.own_buf + 1, &sig, 1);
|
|
if (gdb_signal_to_host_p ((enum gdb_signal) sig))
|
|
signal = gdb_signal_to_host ((enum gdb_signal) sig);
|
|
else
|
|
signal = 0;
|
|
myresume (cs.own_buf, 1, signal);
|
|
break;
|
|
case 'c':
|
|
require_running_or_break (cs.own_buf);
|
|
signal = 0;
|
|
myresume (cs.own_buf, 0, signal);
|
|
break;
|
|
case 's':
|
|
require_running_or_break (cs.own_buf);
|
|
signal = 0;
|
|
myresume (cs.own_buf, 1, signal);
|
|
break;
|
|
case 'Z': /* insert_ ... */
|
|
/* Fallthrough. */
|
|
case 'z': /* remove_ ... */
|
|
{
|
|
char *dataptr;
|
|
ULONGEST addr;
|
|
int kind;
|
|
char type = cs.own_buf[1];
|
|
int res;
|
|
const int insert = ch == 'Z';
|
|
const char *p = &cs.own_buf[3];
|
|
|
|
p = unpack_varlen_hex (p, &addr);
|
|
kind = strtol (p + 1, &dataptr, 16);
|
|
|
|
if (insert)
|
|
{
|
|
struct gdb_breakpoint *bp;
|
|
|
|
bp = set_gdb_breakpoint (type, addr, kind, &res);
|
|
if (bp != NULL)
|
|
{
|
|
res = 0;
|
|
|
|
/* GDB may have sent us a list of *point parameters to
|
|
be evaluated on the target's side. Read such list
|
|
here. If we already have a list of parameters, GDB
|
|
is telling us to drop that list and use this one
|
|
instead. */
|
|
clear_breakpoint_conditions_and_commands (bp);
|
|
const char *options = dataptr;
|
|
process_point_options (bp, &options);
|
|
}
|
|
}
|
|
else
|
|
res = delete_gdb_breakpoint (type, addr, kind);
|
|
|
|
if (res == 0)
|
|
write_ok (cs.own_buf);
|
|
else if (res == 1)
|
|
/* Unsupported. */
|
|
cs.own_buf[0] = '\0';
|
|
else
|
|
write_enn (cs.own_buf);
|
|
break;
|
|
}
|
|
case 'k':
|
|
response_needed = false;
|
|
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_process (kill_inferior_callback);
|
|
|
|
/* When using the extended protocol, we wait with no program
|
|
running. The traditional protocol will exit instead. */
|
|
if (extended_protocol)
|
|
{
|
|
cs.last_status.set_exited (GDB_SIGNAL_KILL);
|
|
return 0;
|
|
}
|
|
else
|
|
exit (0);
|
|
|
|
case 'T':
|
|
{
|
|
require_running_or_break (cs.own_buf);
|
|
|
|
ptid_t thread_id = read_ptid (&cs.own_buf[1], NULL);
|
|
if (find_thread_ptid (thread_id) == NULL)
|
|
{
|
|
write_enn (cs.own_buf);
|
|
break;
|
|
}
|
|
|
|
if (mythread_alive (thread_id))
|
|
write_ok (cs.own_buf);
|
|
else
|
|
write_enn (cs.own_buf);
|
|
}
|
|
break;
|
|
case 'R':
|
|
response_needed = false;
|
|
|
|
/* Restarting the inferior is only supported in the extended
|
|
protocol. */
|
|
if (extended_protocol)
|
|
{
|
|
if (target_running ())
|
|
for_each_process (kill_inferior_callback);
|
|
|
|
fprintf (stderr, "GDBserver restarting\n");
|
|
|
|
/* Wait till we are at 1st instruction in prog. */
|
|
if (program_path.get () != NULL)
|
|
{
|
|
target_create_inferior (program_path.get (), program_args);
|
|
|
|
if (cs.last_status.kind () == TARGET_WAITKIND_STOPPED)
|
|
{
|
|
/* Stopped at the first instruction of the target
|
|
process. */
|
|
cs.general_thread = cs.last_ptid;
|
|
}
|
|
else
|
|
{
|
|
/* Something went wrong. */
|
|
cs.general_thread = null_ptid;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
cs.last_status.set_exited (GDB_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. */
|
|
cs.own_buf[0] = '\0';
|
|
break;
|
|
}
|
|
case 'v':
|
|
/* Extended (long) request. */
|
|
handle_v_requests (cs.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. */
|
|
cs.own_buf[0] = '\0';
|
|
break;
|
|
}
|
|
|
|
if (new_packet_len != -1)
|
|
putpkt_binary (cs.own_buf, new_packet_len);
|
|
else
|
|
putpkt (cs.own_buf);
|
|
|
|
response_needed = false;
|
|
|
|
if (exit_requested)
|
|
return -1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Event-loop callback for serial events. */
|
|
|
|
void
|
|
handle_serial_event (int err, gdb_client_data client_data)
|
|
{
|
|
threads_debug_printf ("handling possible serial event");
|
|
|
|
/* Really handle it. */
|
|
if (process_serial_event () < 0)
|
|
{
|
|
keep_processing_events = false;
|
|
return;
|
|
}
|
|
|
|
/* Be sure to not change the selected thread behind GDB's back.
|
|
Important in the non-stop mode asynchronous protocol. */
|
|
set_desired_thread ();
|
|
}
|
|
|
|
/* Push a stop notification on the notification queue. */
|
|
|
|
static void
|
|
push_stop_notification (ptid_t ptid, const target_waitstatus &status)
|
|
{
|
|
struct vstop_notif *vstop_notif = new struct vstop_notif;
|
|
|
|
vstop_notif->status = status;
|
|
vstop_notif->ptid = ptid;
|
|
/* Push Stop notification. */
|
|
notif_push (¬if_stop, vstop_notif);
|
|
}
|
|
|
|
/* Event-loop callback for target events. */
|
|
|
|
void
|
|
handle_target_event (int err, gdb_client_data client_data)
|
|
{
|
|
client_state &cs = get_client_state ();
|
|
threads_debug_printf ("handling possible target event");
|
|
|
|
cs.last_ptid = mywait (minus_one_ptid, &cs.last_status,
|
|
TARGET_WNOHANG, 1);
|
|
|
|
if (cs.last_status.kind () == TARGET_WAITKIND_NO_RESUMED)
|
|
{
|
|
if (gdb_connected () && report_no_resumed)
|
|
push_stop_notification (null_ptid, cs.last_status);
|
|
}
|
|
else if (cs.last_status.kind () != TARGET_WAITKIND_IGNORE)
|
|
{
|
|
int pid = cs.last_ptid.pid ();
|
|
struct process_info *process = find_process_pid (pid);
|
|
int forward_event = !gdb_connected () || process->gdb_detached;
|
|
|
|
if (cs.last_status.kind () == TARGET_WAITKIND_EXITED
|
|
|| cs.last_status.kind () == TARGET_WAITKIND_SIGNALLED)
|
|
{
|
|
mark_breakpoints_out (process);
|
|
target_mourn_inferior (cs.last_ptid);
|
|
}
|
|
else if (cs.last_status.kind () == TARGET_WAITKIND_THREAD_EXITED)
|
|
;
|
|
else
|
|
{
|
|
/* 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_thread->last_resume_kind = resume_stop;
|
|
current_thread->last_status = cs.last_status;
|
|
}
|
|
|
|
if (forward_event)
|
|
{
|
|
if (!target_running ())
|
|
{
|
|
/* The last process exited. We're done. */
|
|
exit (0);
|
|
}
|
|
|
|
if (cs.last_status.kind () == TARGET_WAITKIND_EXITED
|
|
|| cs.last_status.kind () == TARGET_WAITKIND_SIGNALLED
|
|
|| cs.last_status.kind () == TARGET_WAITKIND_THREAD_EXITED)
|
|
;
|
|
else
|
|
{
|
|
/* 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. */
|
|
enum gdb_signal signal;
|
|
|
|
threads_debug_printf ("GDB not connected; forwarding event %d for"
|
|
" [%s]",
|
|
(int) cs.last_status.kind (),
|
|
target_pid_to_str (cs.last_ptid).c_str ());
|
|
|
|
if (cs.last_status.kind () == TARGET_WAITKIND_STOPPED)
|
|
signal = cs.last_status.sig ();
|
|
else
|
|
signal = GDB_SIGNAL_0;
|
|
target_continue (cs.last_ptid, signal);
|
|
}
|
|
}
|
|
else
|
|
push_stop_notification (cs.last_ptid, cs.last_status);
|
|
}
|
|
|
|
/* Be sure to not change the selected thread behind GDB's back.
|
|
Important in the non-stop mode asynchronous protocol. */
|
|
set_desired_thread ();
|
|
}
|
|
|
|
/* See gdbsupport/event-loop.h. */
|
|
|
|
int
|
|
invoke_async_signal_handlers ()
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
/* See gdbsupport/event-loop.h. */
|
|
|
|
int
|
|
check_async_event_handlers ()
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
/* See gdbsupport/errors.h */
|
|
|
|
void
|
|
flush_streams ()
|
|
{
|
|
fflush (stdout);
|
|
fflush (stderr);
|
|
}
|
|
|
|
/* See gdbsupport/gdb_select.h. */
|
|
|
|
int
|
|
gdb_select (int n, fd_set *readfds, fd_set *writefds,
|
|
fd_set *exceptfds, struct timeval *timeout)
|
|
{
|
|
return select (n, readfds, writefds, exceptfds, timeout);
|
|
}
|
|
|
|
#if GDB_SELF_TEST
|
|
namespace selftests
|
|
{
|
|
|
|
void
|
|
reset ()
|
|
{}
|
|
|
|
} // namespace selftests
|
|
#endif /* GDB_SELF_TEST */
|