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From: "Maciej W. Rozycki" <macro@mips.com>
To: Markus Metzger <markus.t.metzger@intel.com>
Cc: <gdb-patches@sourceware.org>
Subject: Re: [PATCH v2 5/7] btrace, gdbserver: remove the to_supports_btrace target method
Date: Sat, 24 Feb 2018 16:51:00 -0000	[thread overview]
Message-ID: <alpine.DEB.2.00.1802241605470.3553@tp.orcam.me.uk> (raw)
In-Reply-To: <1516976072-19282-6-git-send-email-markus.t.metzger@intel.com>

[-- Attachment #1: Type: text/plain, Size: 1089 bytes --]

On Fri, 26 Jan 2018, Markus Metzger wrote:

> Remove the to_supports_btrace target method and instead rely on detecting errors
> when trying to enable recording.  This will also provide a suitable error
> message explaining why recording is not possible.

 Hmm, v3 of this change (apparently never posted), that is specifically 
commit de6242d30757 ("btrace, gdbserver: remove the to_supports_btrace 
target method"), has broken remote `mips-linux' target debugging 
completely, that is an attempt to make a remote connection fails in the 
initial handshake, e.g.:

Process .../gdb/testsuite/outputs/gdb.base/advance/advance created; pid = 25519
Listening on port 2346
target remote 1.2.3.4:2346
Remote debugging using 1.2.3.4:2346
Reading symbols from .../lib/ld.so.1...done.
0x77fc8de0 in __start () from .../lib/ld.so.1
Protocol error: qXfer:btrace-conf (read-btrace-conf) conflicting enabled responses.
(gdb) continue
The program is not being run.
(gdb) FAIL: gdb.base/advance.exp: can't run to main

See the attached RSP packet exchange log for details.  Please investigate.

  Maciej

[-- Attachment #2: Type: text/plain, Size: 10082 bytes --]

Remote debugging using 1.2.3.4:2346
Sending packet: $qSupported:multiprocess+;swbreak+;hwbreak+;qRelocInsn+;fork-events+;vfork-events+;exec-events+;vContSupported+;QThreadEvents+;no-resumed+;xmlRegisters=i386#6a...Ack
Packet received: PacketSize=3fff;QPassSignals+;QProgramSignals+;QStartupWithShell+;QEnvironmentHexEncoded+;QEnvironmentReset+;QEnvironmentUnset+;QSetWorkingDir+;qXfer:libraries-svr4:read+;augmented-libraries-svr4-read+;qXfer:auxv:read+;qXfer:spu:read+;qXfer:spu:write+;qXfer:siginfo:read+;qXfer:siginfo:write+;qXfer:features:read+;QStartNoAckMode+;qXfer:osdata:read+;multiprocess+;fork-events+;vfork-events+;exec-events+;QNonStop+;QDisableRandomization+;qXfer:threads:read+;BreakpointCommands+;QAgent+;Qbtrace:bts+;Qbtrace-conf:b
Packet qSupported (supported-packets) is supported
Sending packet: $vMustReplyEmpty#3a...Ack
Packet received: 
Sending packet: $QStartNoAckMode#b0...Ack
Packet received: OK
Sending packet: $QProgramSignals:0;1;3;4;6;7;8;9;a;b;c;d;e;f;10;11;12;13;14;15;16;17;18;19;1a;1b;1c;1d;1e;1f;20;21;22;23;24;25;26;27;28;29;2a;2b;2c;2d;2e;2f;30;31;32;33;34;35;36;37;38;39;3a;3b;3c;3d;3e;3f;40;41;42;43;44;45;46;47;48;49;4a;4b;4c;4d;4e;4f;50;51;52;53;54;55;56;57;58;59;5a;5b;5c;5d;5e;5f;60;61;62;63;64;65;66;67;68;69;6a;6b;6c;6d;6e;6f;70;71;72;73;74;75;76;77;78;79;7a;7b;7c;7d;7e;7f;80;81;82;83;84;85;86;87;88;89;8a;8b;8c;8d;8e;8f;90;91;92;93;94;95;96;97;#75...Packet received: OK
Sending packet: $Hgp0.0#ad...Packet received: OK
Sending packet: $qXfer:features:read:target.xml:0,fff#7d...Packet received: l<?xml version="1.0"?>\n<!-- Copyright (C) 2012-2018 Free Software Foundation, Inc.\n\n     Copying and distribution of this file, with or without modification,\n     are permitted in any medium without royalty provided the copyright\n     notice and this notice are preserved.  -->\n\n<!DOCTYPE target SYSTEM "gdb-target.dtd">\n<target>\n  <architecture>mips</architecture>\n  <osabi>GNU/Linux</osabi>\n  <xi:include href="mips-cpu.xml"/>\n  <xi:include href="mips-cp0.xml"/>\n  <xi:include href="mips-fpu.xml"/>\n  <xi:inclu[14 bytes omitted]
Sending packet: $qXfer:features:read:mips-cpu.xml:0,fff#24...Packet received: l<?xml version="1.0"?>\n<!-- Copyright (C) 2007-2018 Free Software Foundation, Inc.\n\n     Copying and distribution of this file, with or without modification,\n     are permitted in any medium without royalty provided the copyright\n     notice and this notice are preserved.  -->\n\n<!DOCTYPE feature SYSTEM "gdb-target.dtd">\n<feature name="org.gnu.gdb.mips.cpu">\n  <reg name="r0" bitsize="32" regnum="0"/>\n  <reg name="r1" bitsize="32"/>\n  <reg name="r2" bitsize="32"/>\n  <reg name="r3" bitsize="32"/>\n  <reg name="[13 bytes omitted]
Sending packet: $qXfer:features:read:mips-cp0.xml:0,fff#df...Packet received: l<?xml version="1.0"?>\n<!-- Copyright (C) 2007-2018 Free Software Foundation, Inc.\n\n     Copying and distribution of this file, with or without modification,\n     are permitted in any medium without royalty provided the copyright\n     notice and this notice are preserved.  -->\n\n<!DOCTYPE feature SYSTEM "gdb-target.dtd">\n<feature name="org.gnu.gdb.mips.cp0">\n  <reg name="status" bitsize="32" regnum="32"/>\n  <reg name="badvaddr" bitsize="32" regnum="35"/>\n  <reg name="cause" bitsize="32" regnum="36"/>\n</featu[12 bytes omitted]
Sending packet: $qXfer:features:read:mips-fpu.xml:0,fff#27...Packet received: l<?xml version="1.0"?>\n<!-- Copyright (C) 2007-2018 Free Software Foundation, Inc.\n\n     Copying and distribution of this file, with or without modification,\n     are permitted in any medium without royalty provided the copyright\n     notice and this notice are preserved.  -->\n\n<!DOCTYPE feature SYSTEM "gdb-target.dtd">\n<feature name="org.gnu.gdb.mips.fpu">\n  <reg name="f0" bitsize="32" type="ieee_single" regnum="38"/>\n  <reg name="f1" bitsize="32" type="ieee_single"/>\n  <reg name="f2" bitsize="32" type="ie[11 bytes omitted]
Sending packet: $qXfer:features:read:mips-dsp.xml:0,fff#23...Packet received: l<?xml version="1.0"?>\n<!-- Copyright (C) 2012-2018 Free Software Foundation, Inc.\n\n     Copying and distribution of this file, with or without modification,\n     are permitted in any medium without royalty provided the copyright\n     notice and this notice are preserved.  -->\n\n<!DOCTYPE feature SYSTEM "gdb-target.dtd">\n<feature name="org.gnu.gdb.mips.dsp">\n  <reg name="hi1" bitsize="32" regnum="72"/>\n  <reg name="lo1" bitsize="32" regnum="73"/>\n  <reg name="hi2" bitsize="32" regnum="74"/>\n  <reg name="lo2"[12 bytes omitted]
Sending packet: $QNonStop:0#8c...Packet received: OK
Sending packet: $qTStatus#49...Packet received: 
Packet qTStatus (trace-status) is NOT supported
Sending packet: $?#3f...Packet received: T051d:d0baff7f;25:e08dfc77;thread:p6a61.6a61;core:0;
Sending packet: $qXfer:threads:read::0,fff#03...Packet received: l<threads>\n<thread id="p6a61.6a61" core="0" name="advance"/>\n</threads>\n
Sending packet: $qAttached:6a61#c7...Packet received: 0
Packet qAttached (query-attached) is supported
Sending packet: $Hc-1#09...Packet received: E01
Sending packet: $qOffsets#4b...Packet received: 
Sending packet: $qXfer:libraries-svr4:read::0,fff#91...Packet received: l<library-list-svr4 version="1.0"/>
Sending packet: $qXfer:auxv:read::0,1000#6b...Packet received: l!\000\000\000\000@ÿw\020\000\000\000\000\000\000\000\006\000\000\000\000@\000\000\021\000\000\000d\000\000\000\003\000\000\0004\000@\000\004\000\000\000 \000\000\000\005\000\000\000\t\000\000\000\a\000\000\000\000\200üw\b\000\000\000\000\000\000\000\t\000\000\000À\005@\000\013\000\000\000cy\000\000\f\000\000\000cy\000\000\r\000\000\000\204\003\000\000\016\000\000\000\204\003\000\000\027\000\000\000\000\000\000\000\031\000\000\000Ó»ÿ\177\037\000\000\000\221¿ÿ\177\017\000\000\000ã»ÿ\177\000\000\000\000\000\000\000\000[10 bytes omitted]
Sending packet: $vFile:setfs:0#bf...Packet received: F0
Packet vFile:setfs (hostio-setfs) is supported
Sending packet: $vFile:open:2f70726f632f32373233332f7461736b2f32373233332f6d617073,0,1c0#db...Packet received: F3
Packet vFile:open (hostio-open) is supported
readahead cache miss 251
Sending packet: $vFile:pread:3,3fff,0#96...Packet received: F33c;00400000-00404000 r-xp 00000000 00:1d 357628039  .../gdb/testsuite/outputs/gdb.base/advance/advance\n00410000-00414000 rwxp 00000000 00:1d 357628039  .../gdb/testsuite/outputs/gdb.base/advance/advance\n77fc8000-77fec000 r-xp 00000000 00:1d 3529929641  .../lib/ld-2.27.9000.so\n77ff0000-77ff4000 r--p 00000000 00:00 0   [3 bytes omitted]
Packet vFile:pread (hostio-pread) is supported
readahead cache miss 252
Sending packet: $vFile:pread:3,3fff,33c#2f...Packet received: F0;
Sending packet: $vFile:close:3#b3...Packet received: F0
Packet vFile:close (hostio-close) is supported
Sending packet: $qXfer:libraries-svr4:read::0,fff#91...Packet received: l<library-list-svr4 version="1.0"/>
Reading symbols from .../lib/ld.so.1...done.
Sending packet: $qSymbol::#5b...Packet received: qSymbol:6e70746c5f76657273696f6e
Packet qSymbol (symbol-lookup) is supported
Sending packet: $qSymbol::6e70746c5f76657273696f6e#4d...Packet received: OK
Sending packet: $m77fd9d40,4#06...Packet received: 0800e003
Sending packet: $m77ff4000,34#fe...Packet received: 7f454c4601010100000000000000000003000800010000009002000034000000c40b00000510007034002000070028000f000e00
Sending packet: $m77ff4034,e0#33...Packet received: 0300007018010000180100001801000018000000180000000400000008000000000000703001000030010000300100001800000018000000040000000400000001000000000000000000000000000000980a0000980a0000050000000000010002000000d0090000d0090000d0090000c0000000c00000000400000004000000040000004802000048020000480200003c0000003c000000040000000400000050e57464000000000000000000000000000000000000000000000000040000000000000000000000000000000000000000000000000000000000000004000000
Sending packet: $m77ff4000,1fff#fa...Packet received: 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
Sending packet: $m77ff5fff,1fff#9d...Packet received: 00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
Sending packet: $m77ff7ffe,2#6d...Packet received: 0000
Sending packet: $qSymbol::#5b...Packet received: qSymbol:6e70746c5f76657273696f6e
Sending packet: $qSymbol::6e70746c5f76657273696f6e#4d...Packet received: OK
Sending packet: $qXfer:threads:read::0,fff#03...Packet received: l<threads>\n<thread id="p6a61.6a61" core="0" name="advance"/>\n</threads>\n
Sending packet: $m77fc8de0,4#35...Packet received: 25c8e003
Sending packet: $m77fc8ddc,4#67...Packet received: 00000000
Sending packet: $m77fc8de0,4#35...Packet received: 25c8e003
Sending packet: $m77fc8ddc,4#67...Packet received: 00000000
Sending packet: $m77fc8de0,4#35...Packet received: 25c8e003
0x77fc8de0 in __start ()
   from .../lib/ld.so.1
Sending packet: $qSymbol::#5b...Packet received: qSymbol:6e70746c5f76657273696f6e
Sending packet: $qSymbol::6e70746c5f76657273696f6e#4d...Packet received: OK
Sending packet: $qXfer:btrace-conf:read::0,fff#5c...Packet received: 
Protocol error: qXfer:btrace-conf (read-btrace-conf) conflicting enabled responses.

  reply	other threads:[~2018-02-24 16:51 UTC|newest]

Thread overview: 40+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-01-26 14:14 [PATCH v2 0/7] improve btrace enable error reporting Markus Metzger
2018-01-26 14:14 ` [PATCH v2 5/7] btrace, gdbserver: remove the to_supports_btrace target method Markus Metzger
2018-02-24 16:51   ` Maciej W. Rozycki [this message]
2018-02-26 13:08     ` Metzger, Markus T
2018-02-26 19:30       ` Andreas Arnez
2018-02-26 21:58         ` Maciej W. Rozycki
2018-02-27 10:57           ` Metzger, Markus T
2018-02-27 15:32             ` Maciej W. Rozycki
2018-02-27 18:14               ` Metzger, Markus T
2018-02-28 10:29                 ` Maciej W. Rozycki
2018-02-28 11:09                   ` Maciej W. Rozycki
2018-02-28 11:24                     ` Metzger, Markus T
2018-02-28 12:53                       ` Metzger, Markus T
2018-02-28 15:55                         ` Maciej W. Rozycki
2018-02-28 16:08                         ` Eli Zaretskii
2018-02-28 12:00     ` Yao Qi
2018-02-28 16:27       ` Sergio Durigan Junior
2018-03-01 11:33         ` Metzger, Markus T
2018-03-01 19:27           ` Sergio Durigan Junior
2018-03-05 12:14             ` Yao Qi
     [not found]               ` <87lgf64i24.fsf@redhat.com>
2018-03-06  9:02                 ` Yao Qi
2018-03-06 16:32                   ` Sergio Durigan Junior
2018-03-01 19:34           ` Maciej W. Rozycki
2018-01-26 14:14 ` [PATCH v2 3/7] btrace: prepare for throwing exceptions when enabling btrace Markus Metzger
2018-01-26 14:14 ` [PATCH v2 1/7] common: add scoped_fd Markus Metzger
2018-02-13 16:48   ` Yao Qi
2018-02-13 17:28     ` Metzger, Markus T
2018-02-14 15:22       ` Yao Qi
2018-02-14 17:26         ` Metzger, Markus T
2018-02-19 15:28           ` Metzger, Markus T
2018-02-20 10:12             ` Yao Qi
2018-02-20 10:46               ` Metzger, Markus T
2018-01-26 14:14 ` [PATCH v2 2/7] common: add scoped_mmap Markus Metzger
2018-01-26 14:14 ` [PATCH v2 6/7] btrace: improve enable error messages Markus Metzger
2018-01-26 14:14 ` [PATCH v2 4/7] btrace, gdbserver: use exceptions to convey btrace enable/disable errors Markus Metzger
2018-02-06 16:28 ` [PATCH v2 0/7] improve btrace enable error reporting Pedro Alves
2018-02-07 10:41   ` Metzger, Markus T
2018-02-07 12:11     ` Pedro Alves
2018-02-08 10:40       ` Metzger, Markus T
     [not found]         ` <9ce0c90a-5c71-0a7d-3779-f826369a95ec@redhat.com>
2018-02-08 13:49           ` Metzger, Markus T

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