projects / lttng-ust.git / blame
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|---|---|---|
| 53f7d0d7 MJ |
1 | <!-- |
| 2 | SPDX-FileCopyrightText: 2013 Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
| 3 | ||
| 4 | SPDX-License-Identifier: CC-BY-4.0 | |
| 5 | --> | |
| 6 | ||
| 60302adc JG |
7 | This is a demo application used to test the LTTng userspace tracer. |
| 8 | ||
| 9 | demo-trace shell script preloads the provider shared objects before | |
| 10 | executing the demo. Executing "demo" without the shell wrapper will not | |
| 11 | provide any tracing support. This ensures the demo binary can be | |
| 12 | distributed on distros without depending on having liblttng-ust.so in | |
| 13 | place. Note: the "demo" program must be compiled with "-ldl" on Linux, | |
| 14 | with "-lc" on BSD. | |
| 15 | ||
| 16 | The simplest command to trace the demo program are: | |
| 17 | lttng create | |
| 18 | lttng enable-event -u -a | |
| 19 | lttng start | |
| 20 | ./demo-trace | |
| 21 | lttng destroy | |
| 22 | ||
| 23 | That will create a trace in your $HOME/lttng-traces directory. | |
| 24 | ||
| 25 | The resulting babeltrace output should look like this: | |
| 26 | [554297567999315] ust_tests_demo:starting: { 1 }, { value = 123 } | |
| 27 | [554297568020834] ust_tests_demo2:loop: { 1 }, { intfield = 0, intfield2 = 0x0, longfield = 0, netintfield = 0, netintfieldhex = 0x0, arrfield1 = [ [0] = 1, [1] = 2, [2] = 3 ], arrfield2 = "test", _seqfield1_length = 4, seqfield1 = [ [0] = 116, [1] = 101, [2] = 115, [3] = 116 ], _seqfield2_length = 4, seqfield2 = "test", stringfield = "test", floatfield = 2222, doublefield = 2 } | |
| 28 | [554297568024780] ust_tests_demo2:loop: { 1 }, { intfield = 1, intfield2 = 0x1, longfield = 1, netintfield = 1, netintfieldhex = 0x1, arrfield1 = [ [0] = 1, [1] = 2, [2] = 3 ], arrfield2 = "test", _seqfield1_length = 4, seqfield1 = [ [0] = 116, [1] = 101, [2] = 115, [3] = 116 ], _seqfield2_length = 4, seqfield2 = "test", stringfield = "test", floatfield = 2222, doublefield = 2 } | |
| 29 | [554297568027050] ust_tests_demo2:loop: { 1 }, { intfield = 2, intfield2 = 0x2, longfield = 2, netintfield = 2, netintfieldhex = 0x2, arrfield1 = [ [0] = 1, [1] = 2, [2] = 3 ], arrfield2 = "test", _seqfield1_length = 4, seqfield1 = [ [0] = 116, [1] = 101, [2] = 115, [3] = 116 ], _seqfield2_length = 4, seqfield2 = "test", stringfield = "test", floatfield = 2222, doublefield = 2 } | |
| 30 | [554297568029014] ust_tests_demo2:loop: { 1 }, { intfield = 3, intfield2 = 0x3, longfield = 3, netintfield = 3, netintfieldhex = 0x3, arrfield1 = [ [0] = 1, [1] = 2, [2] = 3 ], arrfield2 = "test", _seqfield1_length = 4, seqfield1 = [ [0] = 116, [1] = 101, [2] = 115, [3] = 116 ], _seqfield2_length = 4, seqfield2 = "test", stringfield = "test", floatfield = 2222, doublefield = 2 } | |
| 31 | [554297568030861] ust_tests_demo2:loop: { 1 }, { intfield = 4, intfield2 = 0x4, longfield = 4, netintfield = 4, netintfieldhex = 0x4, arrfield1 = [ [0] = 1, [1] = 2, [2] = 3 ], arrfield2 = "test", _seqfield1_length = 4, seqfield1 = [ [0] = 116, [1] = 101, [2] = 115, [3] = 116 ], _seqfield2_length = 4, seqfield2 = "test", stringfield = "test", floatfield = 2222, doublefield = 2 } | |
| 32 | [554297568033138] ust_tests_demo:done: { 1 }, { value = 456 } | |
| 33 | [554297568034533] ust_tests_demo3:done: { 1 }, { value = 42 } |