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path: root/src/core/or/trace_probes_circuit.h
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2020-07-08trace: Helper macro to disambiguate identifiersDavid Goulet
In order to disambiguate the subsystem and event_name identifiers in the tor_trace() macro, add TR_SUBSYS() and TR_EV() which help to identify the parameters of tor_trace() explicitly. Signed-off-by: David Goulet <dgoulet@torproject.org>
2020-07-08trace: Move LTTng specific declartion to .inc fileDavid Goulet
LTTng tracepoint probe declaration is not really following a C standard that coccinelle and checkSpace.pl likes. Move everything to a .inc file and standardize the trace_probes_circuit.h header to include that LTTng specific file if the instrumentation was enabled at configure time. Part of #32910 Signed-off-by: David Goulet <dgoulet@torproject.org>
2020-07-08trace: Only build probes if instrumentation is enabledDavid Goulet
For now, trace_probes_circuit.c only contains LTTng probes so build it only if enabled within in the build system _and_ the code. Also, ignore trace_probes_circuit.h for coccinelle parsing. Signed-off-by: David Goulet <dgoulet@torproject.org>
2020-07-08trace: Comments and improve doc/HACKING/Tracing.mdDavid Goulet
Signed-off-by: David Goulet <dgoulet@torproject.org>
2020-07-08trace: Add two circuit tracepoints for new circuitsDavid Goulet
Signed-off-by: David Goulet <dgoulet@torproject.org>
2020-07-08trace: Add two origin circuit specific tracepointsDavid Goulet
Signed-off-by: David Goulet <dgoulet@torproject.org>
2020-07-08trace: Add four generic circuit tracepointsDavid Goulet
Signed-off-by: David Goulet <dgoulet@torproject.org>
2020-07-08trace: Add four more circuit subsystem tracepointsDavid Goulet
Signed-off-by: David Goulet <dgoulet@torproject.org>
2020-07-08trace: Add single tracepoint in circuit subsystemDavid Goulet
This is the very first tracepoint in tor. It is in the circuit subsystem for when a new circuit opens. LTTng instrumentation requires lot more around a tracepoint than USDT thus this commit only adds one tracepoint in order to outline a base to add more tracepoints later. The idea is that we separate subsystem into what LTTng defines as "providers" so the circuit provider contains the tracepoint definitions for the circuit subsystem. Signed-off-by: David Goulet <dgoulet@torproject.org> Signed-off-by: David Goulet <dgoulet@torproject.org>
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