[lttng-dev] babeltrace cannot open the trace but Trace Compass can open

[Philippe Proulx]

Thank you for the bug report.

Can I kindly ask you to create an official issue for this?

Go to <https://bugs.lttng.org/projects/babeltrace/issues/new>.

I'd also like you to attach the offending CTF trace so that I can
analyze it if it doesn't contain sensitive data and is somewhat small.
If it's not possible, do:

    $ babeltrace2 -o ctf-metadata /mnt/ssd/work/skim/traces/kernel |
grep -A10 '^clock {'

and copy the output to the Redmine issue's description.

BR,

Phil

On Wed, Jul 22, 2020 at 9:17 AM Kim, Seongab via lttng-dev
<lttng-dev at lists.lttng.org> wrote:
>
> Hi,
>
> I have a trace which cannot be opened by babeltrace as below, but I can open it with Trace Compass.
>
> skim at d54030999178:/mnt/ssd/work/skim/traces$ babeltrace2  ./kernel/
> 07-22 07:49:20.099  5264  5264 E PLUGIN/CTF/META/IR-VISITOR get_unary_unsigned at visitor-generate-ir.c:800 [auto-disc-source-ctf-fs] At line 40 in metadata stream: Invalid constant unsigned integer.
> 07-22 07:49:20.099  5264  5264 E PLUGIN/CTF/META/IR-VISITOR visit_clock_decl_entry at visitor-generate-ir.c:4357 [auto-disc-source-ctf-fs] At line 40 in metadata stream: Unexpected unary expression for clock class's `offset` attribute.
> 07-22 07:49:20.099  5264  5264 E PLUGIN/CTF/META/IR-VISITOR visit_clock_decl at visitor-generate-ir.c:4532 [auto-disc-source-ctf-fs] At line 40 in metadata stream: Cannot visit clock class's entry: ret=-22
> 07-22 07:49:20.099  5264  5264 E PLUGIN/CTF/META/IR-VISITOR ctf_visitor_generate_ir_visit_node at visitor-generate-ir.c:4775 [auto-disc-source-ctf-fs] At line 41 in metadata stream: Cannot visit clock class: ret=-22
> 07-22 07:49:20.099  5264  5264 E PLUGIN/CTF/META/DECODER ctf_metadata_decoder_append_content at decoder.c:337 [auto-disc-source-ctf-fs] Failed to visit AST node to create CTF IR objects: mdec-addr=0x22a0d90, ret=-22
> 07-22 07:49:20.099  5264  5264 E PLUGIN/SRC.CTF.FS/META ctf_fs_metadata_set_trace_class at metadata.c:128 [auto-disc-source-ctf-fs] Cannot update metadata decoder's content.
> 07-22 07:49:20.122  5264  5264 E PLUGIN/SRC.CTF.FS ctf_fs_component_create_ctf_fs_trace_one_path at fs.c:1206 [auto-disc-source-ctf-fs] Cannot create trace for `/mnt/ssd/work/skim/traces/kernel`.
> 07-22 07:49:20.123  5264  5264 W LIB/GRAPH add_component_with_init_method_data at graph.c:977 Component initialization method failed: status=ERROR, comp-addr=0x22a68d0, comp-name="auto-disc-source-ctf-fs", comp-log-level=WARNING, comp-class-type=SOURCE, comp-class-name="fs", comp-class-partial-descr="Read CTF traces from the file sy", comp-class-is-frozen=0, comp-class-so-handle-addr=0x22b0de0, comp-class-so-handle-path="/usr/lib/x86_64-linux-gnu/babeltrace2/plugins/babeltrace-plugin-ctf.so", comp-input-port-count=0, comp-output-port-count=0
> 07-22 07:49:20.123  5264  5264 E CLI cmd_run_ctx_create_components_from_config_components at babeltrace2.c:2301 Cannot create component: plugin-name="ctf", comp-cls-name="fs", comp-cls-type=1, comp-name="auto-disc-source-ctf-fs"
> 07-22 07:49:20.123  5264  5264 E CLI cmd_run at babeltrace2.c:2480 Cannot create components.
>
> ERROR:    [Babeltrace CLI] (babeltrace2.c:2480)
>   Cannot create components.
> CAUSED BY [Babeltrace CLI] (babeltrace2.c:2301)
>   Cannot create component: plugin-name="ctf", comp-cls-name="fs", comp-cls-type=1, comp-name="auto-disc-source-ctf-fs"
> CAUSED BY [libbabeltrace2] (graph.c:977)
>   Component initialization method failed: status=ERROR, comp-addr=0x22a68d0, comp-name="auto-disc-source-ctf-fs", comp-log-level=WARNING,
>   comp-class-type=SOURCE, comp-class-name="fs", comp-class-partial-descr="Read CTF traces from the file sy", comp-class-is-frozen=0,
>   comp-class-so-handle-addr=0x22b0de0, comp-class-so-handle-path="/usr/lib/x86_64-linux-gnu/babeltrace2/plugins/babeltrace-plugin-ctf.so",
>   comp-input-port-count=0, comp-output-port-count=0
> CAUSED BY [auto-disc-source-ctf-fs: 'source.ctf.fs'] (fs.c:1206)
>   Cannot create trace for `/mnt/ssd/work/skim/traces/kernel`.
>
> Could someone can advise me how to open the trace with babeltrace?
> I'm using below version.
>
> skim at d54030999178:~/work/tmp$ babeltrace2 -V Babeltrace 2.0.4 "Amqui"
>
> Amqui (/_mkwi_/) is a town in eastern Qu_bec, Canada, at the base of the Gasp_ peninsula in Bas-Saint-Laurent. Located at the confluence of the Humqui and Matap_dia Rivers, its proximity to woodlands makes it a great destination for outdoor activities such as camping, hiking, and mountain biking.
>
> Best regards,
> Seongab Kim
>
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