From: "Alexandra Hájková" <ahajkova@khirnov.net>
To: gdb-patches@sourceware.org
Cc: ahajkova@redhat.com
Subject: [PATCH v2 2/2] remote.c: Make packet_ok return struct packet_result
Date: Tue, 19 Mar 2024 14:58:29 +0100 [thread overview]
Message-ID: <20240319135829.662941-2-ahajkova@khirnov.net> (raw)
In-Reply-To: <20240319135829.662941-1-ahajkova@khirnov.net>
From: Alexandra Hájková <ahajkova@redhat.com>
This allows to print the error message stored in a packet_result
to be easily used in the calling function.
---
gdb/remote.c | 199 +++++++++++++++++++++++++--------------------------
1 file changed, 96 insertions(+), 103 deletions(-)
diff --git a/gdb/remote.c b/gdb/remote.c
index 8462b7e4e60..95e193ba543 100644
--- a/gdb/remote.c
+++ b/gdb/remote.c
@@ -765,8 +765,8 @@ struct remote_features
/* Check result value in BUF for packet WHICH_PACKET and update the packet's
support configuration accordingly. */
- packet_status packet_ok (const char *buf, const int which_packet);
- packet_status packet_ok (const gdb::char_vector &buf, const int which_packet);
+ packet_result packet_ok (const char *buf, const int which_packet);
+ packet_result packet_ok (const gdb::char_vector &buf, const int which_packet);
/* Configuration of a remote target's memory read packet. */
memory_packet_config m_memory_read_packet_config;
@@ -2503,7 +2503,7 @@ packet_check_result (const gdb::char_vector &buf, bool accept_msg)
return packet_check_result (buf.data (), accept_msg);
}
-packet_status
+packet_result
remote_features::packet_ok (const char *buf, const int which_packet)
{
packet_config *config = &m_protocol_packets[which_packet];
@@ -2549,10 +2549,10 @@ remote_features::packet_ok (const char *buf, const int which_packet)
break;
}
- return result.status ();
+ return result;
}
-packet_status
+packet_result
remote_features::packet_ok (const gdb::char_vector &buf, const int which_packet)
{
return packet_ok (buf.data (), which_packet);
@@ -2739,14 +2739,15 @@ remote_target::remote_query_attached (int pid)
putpkt (rs->buf);
getpkt (&rs->buf);
- switch (m_features.packet_ok (rs->buf, PACKET_qAttached))
+ packet_result result = m_features.packet_ok (rs->buf, PACKET_qAttached);
+ switch (result.status())
{
case PACKET_OK:
if (strcmp (rs->buf.data (), "1") == 0)
return 1;
break;
case PACKET_ERROR:
- warning (_("Remote failure reply: %s"), rs->buf.data ());
+ warning (_("Remote failure reply: %s"), result.err_msg());
break;
case PACKET_UNKNOWN:
break;
@@ -3051,7 +3052,6 @@ remote_target::set_syscall_catchpoint (int pid, bool needed, int any_count,
gdb::array_view<const int> syscall_counts)
{
const char *catch_packet;
- enum packet_status result;
int n_sysno = 0;
if (m_features.packet_support (PACKET_QCatchSyscalls) == PACKET_DISABLE)
@@ -3107,8 +3107,8 @@ remote_target::set_syscall_catchpoint (int pid, bool needed, int any_count,
putpkt (catch_packet);
getpkt (&rs->buf);
- result = m_features.packet_ok (rs->buf, PACKET_QCatchSyscalls);
- if (result == PACKET_OK)
+ packet_result result = m_features.packet_ok (rs->buf, PACKET_QCatchSyscalls);
+ if (result.status() == PACKET_OK)
return 0;
else
return -1;
@@ -5113,7 +5113,8 @@ remote_target::start_remote_1 (int from_tty, int extended_p)
{
putpkt ("QStartNoAckMode");
getpkt (&rs->buf);
- if (m_features.packet_ok (rs->buf, PACKET_QStartNoAckMode) == PACKET_OK)
+ if ((m_features.packet_ok (rs->buf, PACKET_QStartNoAckMode)).status ()
+ == PACKET_OK)
rs->noack_mode = 1;
}
@@ -5898,9 +5899,10 @@ remote_target::remote_query_supported ()
/* If an error occurred, warn, but do not return - just reset the
buffer to empty and go on to disable features. */
- if (m_features.packet_ok (rs->buf, PACKET_qSupported) == PACKET_ERROR)
+ packet_result result = m_features.packet_ok (rs->buf, PACKET_qSupported);
+ if (result.status () == PACKET_ERROR)
{
- warning (_("Remote failure reply: %s"), rs->buf.data ());
+ warning (_("Remote failure reply: %s"), result.err_msg ());
rs->buf[0] = 0;
}
}
@@ -6552,7 +6554,8 @@ extended_remote_target::attach (const char *args, int from_tty)
putpkt (rs->buf);
getpkt (&rs->buf);
- switch (m_features.packet_ok (rs->buf, PACKET_vAttach))
+ packet_result result = m_features.packet_ok (rs->buf, PACKET_vAttach);
+ switch (result.status ())
{
case PACKET_OK:
if (!target_is_non_stop_p ())
@@ -6568,9 +6571,9 @@ extended_remote_target::attach (const char *args, int from_tty)
break;
case PACKET_UNKNOWN:
error (_("This target does not support attaching to a process"));
- default:
- error (_("Attaching to %s failed"),
- target_pid_to_str (ptid_t (pid)).c_str ());
+ case PACKET_ERROR:
+ error (_("Attaching to %s failed: %s"),
+ target_pid_to_str (ptid_t (pid)).c_str (), result.err_msg ());
}
switch_to_inferior_no_thread (remote_add_inferior (false, pid, 1, 0));
@@ -7493,14 +7496,15 @@ remote_target::remote_interrupt_ns ()
putpkt (rs->buf);
getpkt (&rs->buf);
- switch (m_features.packet_ok (rs->buf, PACKET_vCtrlC))
+ packet_result result = m_features.packet_ok (rs->buf, PACKET_vCtrlC);
+ switch (result.status ())
{
case PACKET_OK:
break;
case PACKET_UNKNOWN:
error (_("No support for interrupting the remote target."));
case PACKET_ERROR:
- error (_("Interrupting target failed: %s"), rs->buf.data ());
+ error (_("Interrupting target failed: %s"), result.err_msg ());
}
}
@@ -8796,7 +8800,8 @@ remote_target::fetch_register_using_p (struct regcache *regcache,
buf = rs->buf.data ();
- switch (m_features.packet_ok (rs->buf, PACKET_p))
+ packet_result result = m_features.packet_ok (rs->buf, PACKET_p);
+ switch (result.status ())
{
case PACKET_OK:
break;
@@ -8805,7 +8810,7 @@ remote_target::fetch_register_using_p (struct regcache *regcache,
case PACKET_ERROR:
error (_("Could not fetch register \"%s\"; remote failure reply '%s'"),
gdbarch_register_name (regcache->arch (), reg->regnum),
- buf);
+ result.err_msg ());
}
/* If this register is unfetchable, tell the regcache. */
@@ -9102,13 +9107,14 @@ remote_target::store_register_using_P (const struct regcache *regcache,
putpkt (rs->buf);
getpkt (&rs->buf);
- switch (m_features.packet_ok (rs->buf, PACKET_P))
+ packet_result result = m_features.packet_ok (rs->buf, PACKET_P);
+ switch (result.status ())
{
case PACKET_OK:
return 1;
case PACKET_ERROR:
error (_("Could not write register \"%s\"; remote failure reply '%s'"),
- gdbarch_register_name (gdbarch, reg->regnum), rs->buf.data ());
+ gdbarch_register_name (gdbarch, reg->regnum), result.err_msg ());
case PACKET_UNKNOWN:
return 0;
default:
@@ -10539,7 +10545,7 @@ remote_target::remote_vkill (int pid)
putpkt (rs->buf);
getpkt (&rs->buf);
- switch (m_features.packet_ok (rs->buf, PACKET_vKill))
+ switch ((m_features.packet_ok (rs->buf, PACKET_vKill)).status ())
{
case PACKET_OK:
return 0;
@@ -10695,7 +10701,7 @@ remote_target::extended_remote_run (const std::string &args)
putpkt (rs->buf);
getpkt (&rs->buf);
- switch (m_features.packet_ok (rs->buf, PACKET_vRun))
+ switch ((m_features.packet_ok (rs->buf, PACKET_vRun)).status ())
{
case PACKET_OK:
/* We have a wait response. All is well. */
@@ -10802,11 +10808,14 @@ remote_target::extended_remote_set_inferior_cwd ()
putpkt (rs->buf);
getpkt (&rs->buf);
- if (m_features.packet_ok (rs->buf, PACKET_QSetWorkingDir) != PACKET_OK)
+ packet_result result = m_features.packet_ok (rs->buf, PACKET_QSetWorkingDir);
+ if (result.status () == PACKET_ERROR)
error (_("\
Remote replied unexpectedly while setting the inferior's working\n\
directory: %s"),
- rs->buf.data ());
+ result.err_msg ());
+ if (result.status () == PACKET_UNKNOWN)
+ error (_("Remote target failed to process setting the inferior's working directory"));
}
}
@@ -10975,7 +10984,7 @@ remote_target::insert_breakpoint (struct gdbarch *gdbarch,
putpkt (rs->buf);
getpkt (&rs->buf);
- switch (m_features.packet_ok (rs->buf, PACKET_Z0))
+ switch ((m_features.packet_ok (rs->buf, PACKET_Z0)).status ())
{
case PACKET_ERROR:
return -1;
@@ -11076,8 +11085,8 @@ remote_target::insert_watchpoint (CORE_ADDR addr, int len,
putpkt (rs->buf);
getpkt (&rs->buf);
- switch (m_features.packet_ok (rs->buf, (to_underlying (PACKET_Z0)
- + to_underlying (packet))))
+ switch ((m_features.packet_ok (rs->buf, (to_underlying (PACKET_Z0)
+ + to_underlying (packet)))).status ())
{
case PACKET_ERROR:
return -1;
@@ -11125,8 +11134,8 @@ remote_target::remove_watchpoint (CORE_ADDR addr, int len,
putpkt (rs->buf);
getpkt (&rs->buf);
- switch (m_features.packet_ok (rs->buf, (to_underlying (PACKET_Z0)
- + to_underlying (packet))))
+ switch ((m_features.packet_ok (rs->buf, (to_underlying (PACKET_Z0)
+ + to_underlying (packet)))).status ())
{
case PACKET_ERROR:
case PACKET_UNKNOWN:
@@ -11257,7 +11266,6 @@ remote_target::insert_hw_breakpoint (struct gdbarch *gdbarch,
CORE_ADDR addr = bp_tgt->reqstd_address;
struct remote_state *rs;
char *p, *endbuf;
- char *message;
if (m_features.packet_support (PACKET_Z1) == PACKET_DISABLE)
return -1;
@@ -11288,16 +11296,11 @@ remote_target::insert_hw_breakpoint (struct gdbarch *gdbarch,
putpkt (rs->buf);
getpkt (&rs->buf);
- switch (m_features.packet_ok (rs->buf, PACKET_Z1))
+ packet_result result = m_features.packet_ok (rs->buf, PACKET_Z1);
+ switch (result.status ())
{
case PACKET_ERROR:
- if (rs->buf[1] == '.')
- {
- message = strchr (&rs->buf[2], '.');
- if (message)
- error (_("Remote failure reply: %s"), message + 1);
- }
- return -1;
+ error (_("Remote failure reply: %s"), result.err_msg ());
case PACKET_UNKNOWN:
return -1;
case PACKET_OK:
@@ -11335,7 +11338,7 @@ remote_target::remove_hw_breakpoint (struct gdbarch *gdbarch,
putpkt (rs->buf);
getpkt (&rs->buf);
- switch (m_features.packet_ok (rs->buf, PACKET_Z1))
+ switch ((m_features.packet_ok (rs->buf, PACKET_Z1)).status ())
{
case PACKET_ERROR:
case PACKET_UNKNOWN:
@@ -11376,7 +11379,7 @@ remote_target::verify_memory (const gdb_byte *data, CORE_ADDR lma, ULONGEST size
getpkt (&rs->buf);
- status = m_features.packet_ok (rs->buf, PACKET_qCRC);
+ status = (m_features.packet_ok (rs->buf, PACKET_qCRC)).status ();
if (status == PACKET_ERROR)
return -1;
else if (status == PACKET_OK)
@@ -11498,7 +11501,7 @@ remote_target::remote_write_qxfer (const char *object_name,
if (putpkt_binary (rs->buf.data (), i + buf_len) < 0
|| getpkt (&rs->buf) < 0
- || m_features.packet_ok (rs->buf, which_packet) != PACKET_OK)
+ || (m_features.packet_ok (rs->buf, which_packet)).status () != PACKET_OK)
return TARGET_XFER_E_IO;
unpack_varlen_hex (rs->buf.data (), &n);
@@ -11563,7 +11566,7 @@ remote_target::remote_read_qxfer (const char *object_name,
rs->buf[0] = '\0';
packet_len = getpkt (&rs->buf);
if (packet_len < 0
- || m_features.packet_ok (rs->buf, which_packet) != PACKET_OK)
+ || (m_features.packet_ok (rs->buf, which_packet)).status () != PACKET_OK)
return TARGET_XFER_E_IO;
if (rs->buf[0] != 'l' && rs->buf[0] != 'm')
@@ -11868,7 +11871,8 @@ remote_target::search_memory (CORE_ADDR start_addr, ULONGEST search_space_len,
if (putpkt_binary (rs->buf.data (), i + escaped_pattern_len) < 0
|| getpkt (&rs->buf) < 0
- || m_features.packet_ok (rs->buf, PACKET_qSearch_memory) != PACKET_OK)
+ || (m_features.packet_ok (rs->buf, PACKET_qSearch_memory)).status ()
+ != PACKET_OK)
{
/* The request may not have worked because the command is not
supported. If so, fall back to the simple way. */
@@ -12261,7 +12265,6 @@ remote_target::get_thread_local_address (ptid_t ptid, CORE_ADDR lm,
struct remote_state *rs = get_remote_state ();
char *p = rs->buf.data ();
char *endp = p + get_remote_packet_size ();
- enum packet_status result;
strcpy (p, "qGetTLSAddr:");
p += strlen (p);
@@ -12274,15 +12277,15 @@ remote_target::get_thread_local_address (ptid_t ptid, CORE_ADDR lm,
putpkt (rs->buf);
getpkt (&rs->buf);
- result = m_features.packet_ok (rs->buf, PACKET_qGetTLSAddr);
- if (result == PACKET_OK)
+ packet_result result = m_features.packet_ok (rs->buf, PACKET_qGetTLSAddr);
+ if (result.status () == PACKET_OK)
{
ULONGEST addr;
unpack_varlen_hex (rs->buf.data (), &addr);
return addr;
}
- else if (result == PACKET_UNKNOWN)
+ else if (result.status () == PACKET_UNKNOWN)
throw_error (TLS_GENERIC_ERROR,
_("Remote target doesn't support qGetTLSAddr packet"));
else
@@ -12307,7 +12310,6 @@ remote_target::get_tib_address (ptid_t ptid, CORE_ADDR *addr)
struct remote_state *rs = get_remote_state ();
char *p = rs->buf.data ();
char *endp = p + get_remote_packet_size ();
- enum packet_status result;
strcpy (p, "qGetTIBAddr:");
p += strlen (p);
@@ -12316,8 +12318,8 @@ remote_target::get_tib_address (ptid_t ptid, CORE_ADDR *addr)
putpkt (rs->buf);
getpkt (&rs->buf);
- result = m_features.packet_ok (rs->buf, PACKET_qGetTIBAddr);
- if (result == PACKET_OK)
+ packet_result result = m_features.packet_ok (rs->buf, PACKET_qGetTIBAddr);
+ if (result.status () == PACKET_OK)
{
ULONGEST val;
unpack_varlen_hex (rs->buf.data (), &val);
@@ -12325,10 +12327,11 @@ remote_target::get_tib_address (ptid_t ptid, CORE_ADDR *addr)
*addr = (CORE_ADDR) val;
return true;
}
- else if (result == PACKET_UNKNOWN)
+ else if (result.status () == PACKET_UNKNOWN)
error (_("Remote target doesn't support qGetTIBAddr packet"));
else
- error (_("Remote target failed to process qGetTIBAddr request"));
+ error (_("Remote target failed to process qGetTIBAddr request, %s"),
+ result.err_msg ());
}
else
error (_("qGetTIBAddr not supported or disabled on this target"));
@@ -12584,7 +12587,7 @@ remote_target::remote_hostio_send_command (int command_bytes, int which_packet,
return -1;
}
- switch (m_features.packet_ok (rs->buf, which_packet))
+ switch ((m_features.packet_ok (rs->buf, which_packet)).status ())
{
case PACKET_ERROR:
*remote_errno = FILEIO_EINVAL;
@@ -13872,7 +13875,6 @@ remote_target::get_trace_status (struct trace_status *ts)
{
/* Initialize it just to avoid a GCC false warning. */
char *p = NULL;
- enum packet_status result;
struct remote_state *rs = get_remote_state ();
if (m_features.packet_support (PACKET_qTStatus) == PACKET_DISABLE)
@@ -13898,11 +13900,16 @@ remote_target::get_trace_status (struct trace_status *ts)
throw;
}
- result = m_features.packet_ok (p, PACKET_qTStatus);
+ packet_result result = m_features.packet_ok (p, PACKET_qTStatus);
- /* If the remote target doesn't do tracing, flag it. */
- if (result == PACKET_UNKNOWN)
- return -1;
+ switch (result.status ())
+ {
+ case PACKET_ERROR:
+ error (_("Remote failure reply: %s"), result.err_msg ());
+ /* If the remote target doesn't do tracing, flag it. */
+ case PACKET_UNKNOWN:
+ return -1;
+ }
/* We're working with a live target. */
ts->filename = NULL;
@@ -14252,7 +14259,6 @@ remote_target::set_trace_buffer_size (LONGEST val)
struct remote_state *rs = get_remote_state ();
char *buf = rs->buf.data ();
char *endbuf = buf + get_remote_packet_size ();
- enum packet_status result;
gdb_assert (val >= 0 || val == -1);
buf += xsnprintf (buf, endbuf - buf, "QTBuffer:size:");
@@ -14267,10 +14273,15 @@ remote_target::set_trace_buffer_size (LONGEST val)
putpkt (rs->buf);
remote_get_noisy_reply ();
- result = m_features.packet_ok (rs->buf, PACKET_QTBuffer_size);
-
- if (result != PACKET_OK)
- warning (_("Bogus reply from target: %s"), rs->buf.data ());
+ packet_result result = m_features.packet_ok (rs->buf, PACKET_QTBuffer_size);
+ switch (result.status ())
+ {
+ case PACKET_ERROR:
+ warning (_("Bogus reply from target: %s"), result.err_msg ());
+ break;
+ case PACKET_UNKNOWN:
+ warning (_("Remote target failed to process the request "));
+ }
}
}
@@ -14696,14 +14707,9 @@ remote_target::btrace_sync_conf (const btrace_config *conf)
putpkt (buf);
getpkt (&rs->buf);
- if (m_features.packet_ok (buf, PACKET_Qbtrace_conf_bts_size)
- == PACKET_ERROR)
- {
- if (buf[0] == 'E' && buf[1] == '.')
- error (_("Failed to configure the BTS buffer size: %s"), buf + 2);
- else
- error (_("Failed to configure the BTS buffer size."));
- }
+ packet_result result = m_features.packet_ok (buf, PACKET_Qbtrace_conf_bts_size);
+ if (result.status () == PACKET_ERROR)
+ error (_("Failed to configure the BTS buffer size: %s"), result.err_msg ());
rs->btrace_config.bts.size = conf->bts.size;
}
@@ -14719,14 +14725,9 @@ remote_target::btrace_sync_conf (const btrace_config *conf)
putpkt (buf);
getpkt (&rs->buf);
- if (m_features.packet_ok (buf, PACKET_Qbtrace_conf_pt_size)
- == PACKET_ERROR)
- {
- if (buf[0] == 'E' && buf[1] == '.')
- error (_("Failed to configure the trace buffer size: %s"), buf + 2);
- else
- error (_("Failed to configure the trace buffer size."));
- }
+ packet_result result = m_features.packet_ok (buf, PACKET_Qbtrace_conf_pt_size);
+ if (result.status () == PACKET_ERROR)
+ error (_("Failed to configure the trace buffer size: %s"), result.err_msg ());
rs->btrace_config.pt.size = conf->pt.size;
}
@@ -14841,15 +14842,10 @@ remote_target::enable_btrace (thread_info *tp,
putpkt (rs->buf);
getpkt (&rs->buf);
- if (m_features.packet_ok (rs->buf, which_packet) == PACKET_ERROR)
- {
- if (rs->buf[0] == 'E' && rs->buf[1] == '.')
- error (_("Could not enable branch tracing for %s: %s"),
- target_pid_to_str (ptid).c_str (), &rs->buf[2]);
- else
- error (_("Could not enable branch tracing for %s."),
- target_pid_to_str (ptid).c_str ());
- }
+ packet_result result = m_features.packet_ok (rs->buf, which_packet);
+ if (result.status () == PACKET_ERROR)
+ error (_("Could not enable branch tracing for %s: %s"),
+ target_pid_to_str (ptid).c_str (), result.err_msg ());
btrace_target_info *tinfo = new btrace_target_info { ptid };
@@ -14887,15 +14883,10 @@ remote_target::disable_btrace (struct btrace_target_info *tinfo)
putpkt (rs->buf);
getpkt (&rs->buf);
- if (m_features.packet_ok (rs->buf, PACKET_Qbtrace_off) == PACKET_ERROR)
- {
- if (rs->buf[0] == 'E' && rs->buf[1] == '.')
+ packet_result result = m_features.packet_ok (rs->buf, PACKET_Qbtrace_off);
+ if (result.status () == PACKET_ERROR)
error (_("Could not disable branch tracing for %s: %s"),
- target_pid_to_str (tinfo->ptid).c_str (), &rs->buf[2]);
- else
- error (_("Could not disable branch tracing for %s."),
- target_pid_to_str (tinfo->ptid).c_str ());
- }
+ target_pid_to_str (tinfo->ptid).c_str (), result.err_msg ());
delete tinfo;
}
@@ -15160,7 +15151,8 @@ remote_target::thread_events (int enable)
putpkt (rs->buf);
getpkt (&rs->buf);
- switch (m_features.packet_ok (rs->buf, PACKET_QThreadEvents))
+ packet_result result = m_features.packet_ok (rs->buf, PACKET_QThreadEvents);
+ switch (result.status ())
{
case PACKET_OK:
if (strcmp (rs->buf.data (), "OK") != 0)
@@ -15168,7 +15160,7 @@ remote_target::thread_events (int enable)
rs->last_thread_events = enable;
break;
case PACKET_ERROR:
- warning (_("Remote failure reply: %s"), rs->buf.data ());
+ warning (_("Remote failure reply: %s"), result.err_msg ());
break;
case PACKET_UNKNOWN:
break;
@@ -15215,14 +15207,15 @@ remote_target::commit_requested_thread_options ()
putpkt (rs->buf);
getpkt (&rs->buf, 0);
- switch (m_features.packet_ok (rs->buf, PACKET_QThreadOptions))
+ packet_result result = m_features.packet_ok (rs->buf, PACKET_QThreadOptions);
+ switch (result.status ())
{
case PACKET_OK:
if (strcmp (rs->buf.data (), "OK") != 0)
error (_("Remote refused setting thread options: %s"), rs->buf.data ());
break;
case PACKET_ERROR:
- error (_("Remote failure reply: %s"), rs->buf.data ());
+ error (_("Remote failure reply: %s"), result.err_msg ());
case PACKET_UNKNOWN:
gdb_assert_not_reached ("PACKET_UNKNOWN");
break;
--
2.44.0
next prev parent reply other threads:[~2024-03-19 13:59 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-19 13:58 [PATCH v2 1/2] remote.c: Use packet_check_result Alexandra Hájková
2024-03-19 13:58 ` Alexandra Hájková [this message]
2024-03-26 9:48 ` [PATCH v2 2/2] remote.c: Make packet_ok return struct packet_result Andrew Burgess
2024-03-25 10:21 ` [PATCH v2 1/2] remote.c: Use packet_check_result Andrew Burgess
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