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[110.175.148.108]) by smtp.gmail.com with ESMTPSA id d16-20020a056a00245000b004f771b48736sm14283018pfj.194.2022.03.13.21.18.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 13 Mar 2022 21:18:03 -0700 (PDT) From: Nicholas Piggin To: pdbg@lists.ozlabs.org Date: Mon, 14 Mar 2022 14:17:31 +1000 Message-Id: <20220314041735.542867-12-npiggin@gmail.com> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20220314041735.542867-1-npiggin@gmail.com> References: <20220314041735.542867-1-npiggin@gmail.com> MIME-Version: 1.0 Subject: [Pdbg] [PATCH 10/14] gdbserver: implement NoAckMode X-BeenThere: pdbg@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "mailing list for https://github.com/open-power/pdbg development" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Nicholas Piggin Errors-To: pdbg-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Pdbg" This removes a bunch of synchronous round-trips and makes things significantly faster when attached to a high latency link. Signed-off-by: Nicholas Piggin Reviewed-by: Joel Stanley --- src/gdb_parser.rl | 14 +- src/gdb_parser_precompile.c | 291 ++++++++++++++++++++---------------- 2 files changed, 170 insertions(+), 135 deletions(-) diff --git a/src/gdb_parser.rl b/src/gdb_parser.rl index daa4167..f7f9a54 100644 --- a/src/gdb_parser.rl +++ b/src/gdb_parser.rl @@ -43,10 +43,12 @@ /* *data should point to the CRC */ if (crc != *data) { printf("CRC error cmd %d\n", cmd); - send_nack(priv); + if (ack_mode) + send_nack(priv); } else { PR_INFO("Cmd %d\n", cmd); - send_ack(priv); + if (ack_mode) + send_ack(priv); /* Push the response onto the stack */ if (rsp) @@ -86,8 +88,9 @@ # TODO: We don't actually listen to what's supported q_attached = ('qAttached:' xdigit* @{rsp = "1";}); q_C = ('qC' @{rsp = "QC1";}); - q_supported = ('qSupported:' (any & ^'#')* >{rsp = "multiprocess+;vContSupported+";}); + q_supported = ('qSupported:' (any & ^'#')* >{rsp = "multiprocess+;vContSupported+;QStartNoAckMode+";}); qf_threadinfo = ('qfThreadInfo' @{rsp = "m1l";}); + q_start_noack = ('QStartNoAckMode' @{rsp = "OK"; send_ack(priv); ack_mode = false;}); # vCont packet parsing v_contq = ('vCont?' @{rsp = "vCont;c;C;s;S";}); @@ -99,7 +102,8 @@ commands = (get_mem | get_gprs | get_spr | stop_reason | set_thread | q_attached | q_C | q_supported | qf_threadinfo | q_C | - v_contq | v_contc | v_conts | put_mem | detach | unknown ); + q_start_noack | v_contq | v_contc | v_conts | put_mem | + detach | unknown ); cmd = (('$' ((commands & ^'#'*) >reset $crc) ('#' xdigit{2} $hex_digit @end)) >{PR_INFO("RAGEL:cmd\n");}); @@ -120,6 +124,8 @@ static int cs; static command_cb *command_callbacks; +static bool ack_mode = true; + %%write data; void parser_init(command_cb *callbacks) diff --git a/src/gdb_parser_precompile.c b/src/gdb_parser_precompile.c index b8cdbc1..b02ebf0 100644 --- a/src/gdb_parser_precompile.c +++ b/src/gdb_parser_precompile.c @@ -10,7 +10,7 @@ #include "debug.h" -#line 113 "src/gdb_parser.rl" +#line 117 "src/gdb_parser.rl" static enum gdb_command cmd = NONE; @@ -21,162 +21,185 @@ static int cs; static command_cb *command_callbacks; +static bool ack_mode = true; + -#line 26 "src/gdb_parser.c" +#line 28 "src/gdb_parser.c" static const char _gdb_actions[] = { 0, 1, 0, 1, 1, 1, 2, 1, - 3, 1, 14, 1, 19, 1, 20, 1, - 21, 1, 22, 2, 0, 1, 2, 2, + 3, 1, 14, 1, 20, 1, 21, 1, + 22, 1, 23, 2, 0, 1, 2, 2, 1, 2, 3, 1, 2, 3, 4, 2, 6, 1, 2, 10, 1, 2, 12, 1, 2, 13, 1, 2, 14, 1, 2, 15, 1, 2, 16, 1, 2, 17, 1, 2, - 18, 1, 3, 0, 5, 1, 3, 0, - 7, 1, 3, 0, 8, 1, 3, 0, - 9, 1, 3, 0, 11, 1, 3, 6, - 2, 1, 3, 6, 3, 1 + 18, 1, 2, 19, 1, 3, 0, 5, + 1, 3, 0, 7, 1, 3, 0, 8, + 1, 3, 0, 9, 1, 3, 0, 11, + 1, 3, 6, 2, 1, 3, 6, 3, + 1 }; static const unsigned char _gdb_key_offsets[] = { - 0, 0, 10, 11, 17, 23, 30, 37, - 38, 45, 53, 60, 69, 76, 84, 91, - 99, 104, 106, 108, 110, 112, 114, 116, - 118, 120, 127, 129, 131, 133, 135, 137, - 139, 141, 143, 145, 146, 148, 150, 152, - 154, 156, 158, 160, 162, 164, 166, 168, - 170, 172, 174, 177, 180, 181, 182 + 0, 0, 11, 12, 18, 24, 31, 38, + 39, 46, 54, 61, 70, 77, 85, 87, + 89, 91, 93, 95, 97, 99, 101, 103, + 105, 107, 109, 111, 113, 120, 128, 133, + 135, 137, 139, 141, 143, 145, 147, 149, + 156, 158, 160, 162, 164, 166, 168, 170, + 172, 174, 175, 177, 179, 181, 183, 185, + 187, 189, 191, 193, 195, 197, 199, 201, + 203, 206, 209, 210, 211 }; static const char _gdb_trans_keys[] = { - 35, 63, 68, 72, 77, 103, 109, 112, - 113, 118, 35, 48, 57, 65, 70, 97, - 102, 48, 57, 65, 70, 97, 102, 35, + 35, 63, 68, 72, 77, 81, 103, 109, + 112, 113, 118, 35, 48, 57, 65, 70, + 97, 102, 48, 57, 65, 70, 97, 102, + 35, 48, 57, 65, 70, 97, 102, 35, + 48, 57, 65, 70, 97, 102, 35, 35, + 48, 57, 65, 70, 97, 102, 35, 44, + 48, 57, 65, 70, 97, 102, 35, 48, + 57, 65, 70, 97, 102, 35, 44, 58, 48, 57, 65, 70, 97, 102, 35, 48, - 57, 65, 70, 97, 102, 35, 35, 48, 57, 65, 70, 97, 102, 35, 44, 48, - 57, 65, 70, 97, 102, 35, 48, 57, - 65, 70, 97, 102, 35, 44, 58, 48, - 57, 65, 70, 97, 102, 35, 48, 57, - 65, 70, 97, 102, 35, 44, 48, 57, - 65, 70, 97, 102, 35, 48, 57, 65, - 70, 97, 102, 35, 44, 48, 57, 65, - 70, 97, 102, 35, 65, 67, 83, 102, - 35, 116, 35, 116, 35, 97, 35, 99, - 35, 104, 35, 101, 35, 100, 35, 58, - 35, 48, 57, 65, 70, 97, 102, 35, - 117, 35, 112, 35, 112, 35, 111, 35, - 114, 35, 116, 35, 101, 35, 100, 35, - 58, 35, 35, 84, 35, 104, 35, 114, - 35, 101, 35, 97, 35, 100, 35, 73, - 35, 110, 35, 102, 35, 111, 35, 67, - 35, 111, 35, 110, 35, 116, 35, 59, - 63, 35, 99, 115, 35, 35, 3, 36, - 43, 45, 0 + 57, 65, 70, 97, 102, 35, 83, 35, + 116, 35, 97, 35, 114, 35, 116, 35, + 78, 35, 111, 35, 65, 35, 99, 35, + 107, 35, 77, 35, 111, 35, 100, 35, + 101, 35, 48, 57, 65, 70, 97, 102, + 35, 44, 48, 57, 65, 70, 97, 102, + 35, 65, 67, 83, 102, 35, 116, 35, + 116, 35, 97, 35, 99, 35, 104, 35, + 101, 35, 100, 35, 58, 35, 48, 57, + 65, 70, 97, 102, 35, 117, 35, 112, + 35, 112, 35, 111, 35, 114, 35, 116, + 35, 101, 35, 100, 35, 58, 35, 35, + 84, 35, 104, 35, 114, 35, 101, 35, + 97, 35, 100, 35, 73, 35, 110, 35, + 102, 35, 111, 35, 67, 35, 111, 35, + 110, 35, 116, 35, 59, 63, 35, 99, + 115, 35, 35, 3, 36, 43, 45, 0 }; static const char _gdb_single_lengths[] = { - 0, 10, 1, 0, 0, 1, 1, 1, - 1, 2, 1, 3, 1, 2, 1, 2, - 5, 2, 2, 2, 2, 2, 2, 2, + 0, 11, 1, 0, 0, 1, 1, 1, + 1, 2, 1, 3, 1, 2, 2, 2, + 2, 2, 2, 2, 2, 2, 2, 2, + 2, 2, 2, 2, 1, 2, 5, 2, + 2, 2, 2, 2, 2, 2, 2, 1, + 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, - 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, - 2, 2, 3, 3, 1, 1, 4 + 3, 3, 1, 1, 4 }; static const char _gdb_range_lengths[] = { 0, 0, 0, 3, 3, 3, 3, 0, - 3, 3, 3, 3, 3, 3, 3, 3, + 3, 3, 3, 3, 3, 3, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 3, 3, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0 + 0, 0, 0, 0, 0 }; -static const unsigned char _gdb_index_offsets[] = { - 0, 0, 11, 13, 17, 21, 26, 31, - 33, 38, 44, 49, 56, 61, 67, 72, - 78, 84, 87, 90, 93, 96, 99, 102, - 105, 108, 113, 116, 119, 122, 125, 128, - 131, 134, 137, 140, 142, 145, 148, 151, - 154, 157, 160, 163, 166, 169, 172, 175, - 178, 181, 184, 188, 192, 194, 196 +static const short _gdb_index_offsets[] = { + 0, 0, 12, 14, 18, 22, 27, 32, + 34, 39, 45, 50, 57, 62, 68, 71, + 74, 77, 80, 83, 86, 89, 92, 95, + 98, 101, 104, 107, 110, 115, 121, 127, + 130, 133, 136, 139, 142, 145, 148, 151, + 156, 159, 162, 165, 168, 171, 174, 177, + 180, 183, 185, 188, 191, 194, 197, 200, + 203, 206, 209, 212, 215, 218, 221, 224, + 227, 231, 235, 237, 239 }; static const char _gdb_indicies[] = { 1, 2, 3, 4, 5, 6, 7, 8, - 9, 10, 0, 12, 11, 13, 13, 13, - 14, 15, 15, 15, 14, 12, 16, 16, - 16, 11, 17, 16, 16, 16, 11, 12, - 18, 12, 20, 20, 20, 19, 12, 21, - 20, 20, 20, 19, 12, 22, 22, 22, - 19, 12, 21, 23, 22, 22, 22, 19, - 12, 24, 24, 24, 19, 17, 21, 24, - 24, 24, 19, 12, 25, 25, 25, 11, - 12, 26, 25, 25, 25, 11, 12, 27, - 28, 29, 30, 11, 12, 31, 11, 12, - 32, 11, 12, 33, 11, 12, 34, 11, - 12, 35, 11, 12, 36, 11, 12, 37, - 11, 12, 38, 11, 12, 39, 39, 39, - 11, 12, 40, 11, 12, 41, 11, 12, - 42, 11, 12, 43, 11, 12, 44, 11, - 12, 45, 11, 12, 46, 11, 12, 47, - 11, 12, 48, 11, 50, 49, 12, 51, - 11, 12, 52, 11, 12, 53, 11, 12, - 54, 11, 12, 55, 11, 12, 56, 11, - 12, 57, 11, 12, 58, 11, 12, 59, - 11, 12, 60, 11, 12, 61, 11, 12, - 62, 11, 12, 63, 11, 12, 64, 11, - 12, 65, 66, 11, 12, 67, 68, 11, - 12, 69, 12, 70, 71, 72, 73, 74, - 14, 0 + 9, 10, 11, 0, 13, 12, 14, 14, + 14, 15, 16, 16, 16, 15, 13, 17, + 17, 17, 12, 18, 17, 17, 17, 12, + 13, 19, 13, 21, 21, 21, 20, 13, + 22, 21, 21, 21, 20, 13, 23, 23, + 23, 20, 13, 22, 24, 23, 23, 23, + 20, 13, 25, 25, 25, 20, 18, 22, + 25, 25, 25, 20, 13, 26, 12, 13, + 27, 12, 13, 28, 12, 13, 29, 12, + 13, 30, 12, 13, 31, 12, 13, 32, + 12, 13, 33, 12, 13, 34, 12, 13, + 35, 12, 13, 36, 12, 13, 37, 12, + 13, 38, 12, 13, 39, 12, 13, 40, + 40, 40, 12, 13, 41, 40, 40, 40, + 12, 13, 42, 43, 44, 45, 12, 13, + 46, 12, 13, 47, 12, 13, 48, 12, + 13, 49, 12, 13, 50, 12, 13, 51, + 12, 13, 52, 12, 13, 53, 12, 13, + 54, 54, 54, 12, 13, 55, 12, 13, + 56, 12, 13, 57, 12, 13, 58, 12, + 13, 59, 12, 13, 60, 12, 13, 61, + 12, 13, 62, 12, 13, 63, 12, 65, + 64, 13, 66, 12, 13, 67, 12, 13, + 68, 12, 13, 69, 12, 13, 70, 12, + 13, 71, 12, 13, 72, 12, 13, 73, + 12, 13, 74, 12, 13, 75, 12, 13, + 76, 12, 13, 77, 12, 13, 78, 12, + 13, 79, 12, 13, 80, 81, 12, 13, + 82, 83, 12, 13, 84, 13, 85, 86, + 87, 88, 89, 15, 0 }; static const char _gdb_trans_targs[] = { - 2, 3, 2, 5, 7, 8, 2, 14, - 5, 16, 46, 2, 3, 4, 0, 54, - 6, 3, 7, 8, 9, 10, 11, 12, - 13, 15, 5, 17, 2, 26, 36, 18, - 19, 20, 21, 22, 23, 24, 25, 25, - 27, 28, 29, 30, 31, 32, 33, 34, - 35, 2, 3, 37, 38, 39, 40, 41, - 42, 43, 44, 45, 2, 47, 48, 49, - 50, 51, 2, 52, 53, 52, 53, 54, - 1, 54, 54 + 2, 3, 2, 5, 7, 8, 14, 2, + 28, 5, 30, 60, 2, 3, 4, 0, + 68, 6, 3, 7, 8, 9, 10, 11, + 12, 13, 15, 16, 17, 18, 19, 20, + 21, 22, 23, 24, 25, 26, 27, 2, + 29, 5, 31, 2, 40, 50, 32, 33, + 34, 35, 36, 37, 38, 39, 39, 41, + 42, 43, 44, 45, 46, 47, 48, 49, + 2, 3, 51, 52, 53, 54, 55, 56, + 57, 58, 59, 2, 61, 62, 63, 64, + 65, 2, 66, 67, 66, 67, 68, 1, + 68, 68 }; static const char _gdb_trans_actions[] = { - 19, 1, 70, 74, 19, 19, 62, 58, - 66, 19, 19, 3, 0, 7, 0, 28, - 25, 5, 34, 31, 82, 78, 82, 78, - 82, 25, 22, 3, 40, 3, 3, 3, - 3, 3, 3, 3, 3, 3, 3, 37, + 19, 1, 73, 77, 19, 19, 19, 65, + 61, 69, 19, 19, 3, 0, 7, 0, + 28, 25, 5, 34, 31, 85, 81, 85, + 81, 85, 3, 3, 3, 3, 3, 3, + 3, 3, 3, 3, 3, 3, 3, 49, + 25, 22, 3, 40, 3, 3, 3, 3, + 3, 3, 3, 3, 3, 3, 37, 3, 3, 3, 3, 3, 3, 3, 3, 3, - 3, 43, 9, 3, 3, 3, 3, 3, - 3, 3, 3, 3, 46, 3, 3, 3, - 3, 3, 49, 3, 3, 52, 55, 11, - 13, 15, 17 + 43, 9, 3, 3, 3, 3, 3, 3, + 3, 3, 3, 46, 3, 3, 3, 3, + 3, 52, 3, 3, 55, 58, 11, 13, + 15, 17 }; -static const int gdb_start = 54; -static const int gdb_first_final = 54; +static const int gdb_start = 68; +static const int gdb_first_final = 68; static const int gdb_error = 0; -static const int gdb_en_main = 54; +static const int gdb_en_main = 68; -#line 124 "src/gdb_parser.rl" +#line 130 "src/gdb_parser.rl" void parser_init(command_cb *callbacks) { -#line 175 "src/gdb_parser.c" +#line 198 "src/gdb_parser.c" { cs = gdb_start; } -#line 128 "src/gdb_parser.rl" +#line 134 "src/gdb_parser.rl" command_callbacks = callbacks; } @@ -187,7 +210,7 @@ int parse_buffer(char *buf, size_t len, void *priv) char *pe = p + len; -#line 191 "src/gdb_parser.c" +#line 214 "src/gdb_parser.c" { int _klen; unsigned int _trans; @@ -304,10 +327,12 @@ _match: /* *data should point to the CRC */ if (crc != *data) { printf("CRC error cmd %d\n", cmd); - send_nack(priv); + if (ack_mode) + send_nack(priv); } else { PR_INFO("Cmd %d\n", cmd); - send_ack(priv); + if (ack_mode) + send_ack(priv); /* Push the response onto the stack */ if (rsp) @@ -321,78 +346,82 @@ _match: } break; case 5: -#line 62 "src/gdb_parser.rl" +#line 64 "src/gdb_parser.rl" {cmd = GET_MEM;} break; case 6: -#line 67 "src/gdb_parser.rl" +#line 69 "src/gdb_parser.rl" {cmd = PUT_MEM;} break; case 7: -#line 74 "src/gdb_parser.rl" +#line 76 "src/gdb_parser.rl" {cmd = GET_GPRS;} break; case 8: -#line 76 "src/gdb_parser.rl" +#line 78 "src/gdb_parser.rl" {cmd = GET_SPR;} break; case 9: -#line 79 "src/gdb_parser.rl" +#line 81 "src/gdb_parser.rl" {cmd = STOP_REASON;} break; case 10: -#line 81 "src/gdb_parser.rl" +#line 83 "src/gdb_parser.rl" {cmd = SET_THREAD;} break; case 11: -#line 83 "src/gdb_parser.rl" +#line 85 "src/gdb_parser.rl" {cmd = DETACH;} break; case 12: -#line 87 "src/gdb_parser.rl" +#line 89 "src/gdb_parser.rl" {rsp = "1";} break; case 13: -#line 88 "src/gdb_parser.rl" +#line 90 "src/gdb_parser.rl" {rsp = "QC1";} break; case 14: -#line 89 "src/gdb_parser.rl" - {rsp = "multiprocess+;vContSupported+";} +#line 91 "src/gdb_parser.rl" + {rsp = "multiprocess+;vContSupported+;QStartNoAckMode+";} break; case 15: -#line 90 "src/gdb_parser.rl" +#line 92 "src/gdb_parser.rl" {rsp = "m1l";} break; case 16: #line 93 "src/gdb_parser.rl" - {rsp = "vCont;c;C;s;S";} + {rsp = "OK"; send_ack(priv); ack_mode = false;} break; case 17: -#line 94 "src/gdb_parser.rl" - {cmd = V_CONTC;} +#line 96 "src/gdb_parser.rl" + {rsp = "vCont;c;C;s;S";} break; case 18: -#line 95 "src/gdb_parser.rl" - {cmd = V_CONTS;} +#line 97 "src/gdb_parser.rl" + {cmd = V_CONTC;} break; case 19: #line 98 "src/gdb_parser.rl" - { if (command_callbacks) command_callbacks[INTERRUPT](stack, priv); PR_INFO("RAGEL:interrupt\n");} + {cmd = V_CONTS;} break; case 20: -#line 105 "src/gdb_parser.rl" - {PR_INFO("RAGEL:cmd\n");} +#line 101 "src/gdb_parser.rl" + { if (command_callbacks) command_callbacks[INTERRUPT](stack, priv); PR_INFO("RAGEL:interrupt\n");} break; case 21: -#line 108 "src/gdb_parser.rl" - {PR_INFO("RAGEL:ack\n");} +#line 109 "src/gdb_parser.rl" + {PR_INFO("RAGEL:cmd\n");} break; case 22: -#line 109 "src/gdb_parser.rl" +#line 112 "src/gdb_parser.rl" + {PR_INFO("RAGEL:ack\n");} + break; + case 23: +#line 113 "src/gdb_parser.rl" {PR_INFO("RAGEL:nack\n");} break; -#line 396 "src/gdb_parser.c" +#line 425 "src/gdb_parser.c" } } @@ -405,7 +434,7 @@ _again: _out: {} } -#line 138 "src/gdb_parser.rl" +#line 144 "src/gdb_parser.rl" if (cs == gdb_error) { printf("parse error\n");