diff options
| author | David Goulet <dgoulet@torproject.org> | 2020-02-11 11:26:04 -0500 |
|---|---|---|
| committer | David Goulet <dgoulet@torproject.org> | 2020-07-08 09:10:08 -0400 |
| commit | 0de543aae636e422bc9fa339efa81e8260b77ae4 (patch) | |
| tree | 8168f28c340b36fb571b28ff00505fba00ed7781 /src/lib | |
| parent | 668fc70a20c602bb0e74bf0e19589a17bb45b7ae (diff) | |
| download | tor-0de543aae636e422bc9fa339efa81e8260b77ae4.tar.gz tor-0de543aae636e422bc9fa339efa81e8260b77ae4.zip | |
trace: Add LTTng-UST interface support
No probes at this point. They are per subsystem and thus in later commits.
Part of #32910
Diffstat (limited to 'src/lib')
| -rw-r--r-- | src/lib/trace/events.h | 5 | ||||
| -rw-r--r-- | src/lib/trace/include.am | 4 | ||||
| -rw-r--r-- | src/lib/trace/lttng/include.am | 3 | ||||
| -rw-r--r-- | src/lib/trace/lttng/lttng.h | 28 |
4 files changed, 40 insertions, 0 deletions
diff --git a/src/lib/trace/events.h b/src/lib/trace/events.h index fcd31e24e1..8cc0136b09 100644 --- a/src/lib/trace/events.h +++ b/src/lib/trace/events.h @@ -17,6 +17,7 @@ do { \ TOR_TRACE_LOG_DEBUG(tor_ ## subsystem, event_name); \ TOR_TRACE_USDT(tor_ ## subsystem, event_name, ## __VA_ARGS__); \ + TOR_TRACE_LTTNG(tor_ ## subsystem, event_name, ## __VA_ARGS__); \ } while (0) /* This corresponds to the --enable-tracing-instrumentation-log-debug @@ -27,6 +28,10 @@ * option which will generate USDT probes for each tracepoints. */ #include "lib/trace/usdt/usdt.h" +/* This corresponds to the --enable-tracing-instrumentation-lttng configure + * option which will generate LTTng probes for each tracepoints. */ +#include "lib/trace/lttng/lttng.h" + #else /* !defined(HAVE_TRACING) */ /* Reaching this point, tracing is disabled thus we NOP every tracepoints diff --git a/src/lib/trace/include.am b/src/lib/trace/include.am index 01ea0c8a1d..8440331325 100644 --- a/src/lib/trace/include.am +++ b/src/lib/trace/include.am @@ -22,6 +22,10 @@ if USE_TRACING_INSTRUMENTATION_USDT include src/lib/trace/usdt/include.am endif +if USE_TRACING_INSTRUMENTATION_LTTNG +include src/lib/trace/lttng/include.am +endif + src_lib_libtor_trace_a_SOURCES = $(LIBTOR_TRACE_A_SOURCES) noinst_HEADERS+= $(TRACEHEADERS) diff --git a/src/lib/trace/lttng/include.am b/src/lib/trace/lttng/include.am new file mode 100644 index 0000000000..4495ce0900 --- /dev/null +++ b/src/lib/trace/lttng/include.am @@ -0,0 +1,3 @@ +# ADD_C_FILE: INSERT HEADERS HERE. +TRACEHEADERS += \ + src/lib/trace/lttng/lttng.h diff --git a/src/lib/trace/lttng/lttng.h b/src/lib/trace/lttng/lttng.h new file mode 100644 index 0000000000..8ede98bb02 --- /dev/null +++ b/src/lib/trace/lttng/lttng.h @@ -0,0 +1,28 @@ +/* Copyright (c) 2020, The Tor Project, Inc. */ +/* See LICENSE for licensing information */ + +/** + * \file lttng.h + * \brief Header file for lttng.c. + **/ + +#ifndef TOR_TRACE_LTTNG_LTTNG_H +#define TOR_TRACE_LTTNG_LTTNG_H + +#ifdef USE_TRACING_INSTRUMENTATION_LTTNG + +#include <lttng/tracepoint.h> + +/* Map event to an LTTng tracepoint. */ +#define TOR_TRACE_LTTNG(subsystem, event_name, ...) \ + tracepoint(subsystem, event_name, ## __VA_ARGS__) + +#else /* !defined(USE_TRACING_INSTRUMENTATION_LTTNG) */ + +/* NOP event. */ +#define TOR_TRACE_LTTNG(subsystem, event_name, ...) + +#endif /* !defined(USE_TRACING_INSTRUMENTATION_LTTNG) */ + +#endif /* TOR_TRACE_LTTNG_LTTNG_H */ + |