tracing: add lttng support for tracing on linux

This commit adds the ability to enable userspace tracing with lttng
in io.js. It adds tracepoints for all the equivalent dtrace and ETW
tracepoints. To use these tracepoints enable --with-lttng on linux.

PR-URL: https://github.com/iojs/io.js/pull/702
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Ryan Graham <ryan@strongloop.com>
Reviewed-By: Stephen Belanger <admin@stephenbelanger.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/node.gyp b/node.gyp
index 2874f13094..8506b28685 100644
--- a/node.gyp
+++ b/node.gyp
@@ -2,6 +2,7 @@
   'variables': {
     'v8_use_snapshot%': 'false',
     'node_use_dtrace%': 'false',
+    'node_use_lttng%': 'false',
     'node_use_etw%': 'false',
     'node_use_perfctr%': 'false',
     'node_has_winsdk%': 'false',
@@ -260,6 +261,14 @@
             }
           ] ]
         } ],
+        [ 'node_use_lttng=="true"', {
+          'defines': [ 'HAVE_LTTNG=1' ],
+          'include_dirs': [ '<(SHARED_INTERMEDIATE_DIR)' ],
+          'libraries': [ '-llttng-ust' ],
+          'sources': [
+            'src/node_lttng.cc'
+          ],
+        } ],
         [ 'node_use_mdb=="true"', {
           'dependencies': [ 'node_mdb' ],
           'include_dirs': [ '<(SHARED_INTERMEDIATE_DIR)' ],
@@ -450,6 +459,9 @@
             [ 'node_use_dtrace=="false" and node_use_etw=="false"', {
               'inputs': [ 'src/notrace_macros.py' ]
             }],
+            ['node_use_lttng=="false"', {
+              'inputs': [ 'src/nolttng_macros.py' ]
+            }],
             [ 'node_use_perfctr=="false"', {
               'inputs': [ 'src/perfctr_macros.py' ]
             }]