LTTng » LTTng-tools

Getting Babeltrace with apt-get on Trusty 14.04, installs v1.2.1.
Running LTTng-Tools master filtering tests (regression/tools/filtering) with this version fails because of the regex in the babelstat.pl script can't find matches in Babeltrace's output.

The text output of Babeltrace was changed by this commit: [[https://github.com/efficios/babeltrace/commit/28ec16362c75cd5ae77c338b3e27a045176c975a]]
Writing the text output of a trace recorded with LTTng post-2.8 with a Babeltrace ~pre-v1.2.5 will cause the packet_seq_num to be printed and will make the tests fail.

Here is the output of the same LTTng 2.10.0.pre trace with Babeltrace before and after this commit:

 46b43f0
 [15:34:31.394612374] (+?.?????????) linaro-server tp:tptest: { packet_seq_num = 0, cpu_id = 13 }, { procname = "gen-ust-events" }, { intfield = 1, intfield2 = 0x1, longfield = 1, netintfield = 1, netintfieldhe
    x = 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", stringfield2 = "\*", floatfield = 2222, doublefield = 2 }                                                                                                                                             
 [15:34:31.394681875] (+0.000069501) linaro-server tp:tptest: { packet_seq_num = 0, cpu_id = 13 }, { procname = "gen-ust-events" }, { intfield = 2, intfield2 = 0x2, longfield = 2, netintfield = 2, netintfieldhe
    x = 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", stringfield2 = "\*", floatfield = 2222, doublefield = 2 }

 28ec163
 [15:34:31.394612374] (+?.?????????) linaro-server tp:tptest: { cpu_id = 13 }, { procname = "gen-ust-events" }, { 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", stringfie 
    ld2 = "\*", floatfield = 2222, doublefield = 2 }
 [15:34:31.394681875] (+0.000069501) linaro-server tp:tptest: { cpu_id = 13 }, { procname = "gen-ust-events" }, { 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", stringfie 
    ld2 = "\*", floatfield = 2222, doublefield = 2 }

One solution could be to upgrade the Trusty package to a more recent version.
Another solution would be to include a second regex in babelstat.pl that is run when and older Babeltrace is detected.