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Tracing: Add lttng support for tracing on Linux. #702

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3 changes: 2 additions & 1 deletion Makefile
Original file line number Diff line number Diff line change
Expand Up @@ -395,8 +395,9 @@ jslint:

CPPLINT_EXCLUDE ?=
CPPLINT_EXCLUDE += src/node_dtrace.cc
CPPLINT_EXCLUDE += src/node_dtrace.cc
CPPLINT_EXCLUDE += src/node_lttng.cc
CPPLINT_EXCLUDE += src/node_root_certs.h
CPPLINT_EXCLUDE += src/node_lttng_tp.h
CPPLINT_EXCLUDE += src/node_win32_perfctr_provider.cc
CPPLINT_EXCLUDE += src/queue.h
CPPLINT_EXCLUDE += src/tree.h
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14 changes: 14 additions & 0 deletions configure
Original file line number Diff line number Diff line change
Expand Up @@ -213,6 +213,11 @@ parser.add_option('--with-dtrace',
dest='with_dtrace',
help='build with DTrace (default is true on sunos)')

parser.add_option('--with-lttng',
action='store_true',
dest='with_lttng',
help='build with Lttng (Only available to Linux)')
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Can it default to 'on' on Linux, or will that break Linuxen that don't have LTTNG?

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It cannot default to 'on' on Linux as the library won't be accessible to the compiler if its not installed.


parser.add_option('--with-etw',
action='store_true',
dest='with_etw',
Expand Down Expand Up @@ -524,6 +529,15 @@ def configure_node(o):
else:
o['variables']['node_use_dtrace'] = 'false'

# Enable Lttng if --with-lttng was defined. Use logic similar to
# ETW for windows. Lttng is only available on the Linux platform.
if flavor == 'linux':
o['variables']['node_use_lttng'] = b(options.with_lttng)
elif options.with_lttng:
raise Exception('lttng is only supported on Linux.')
else:
o['variables']['node_use_lttng'] = 'false'

# if we're on illumos based systems wrap the helper library into the
# executable
if flavor == 'solaris':
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2 changes: 2 additions & 0 deletions lib/_http_client.js
Original file line number Diff line number Diff line change
Expand Up @@ -155,6 +155,7 @@ ClientRequest.prototype.aborted = undefined;

ClientRequest.prototype._finish = function() {
DTRACE_HTTP_CLIENT_REQUEST(this, this.connection);
LTTNG_HTTP_CLIENT_REQUEST(this, this.connection);
COUNTER_HTTP_CLIENT_REQUEST();
OutgoingMessage.prototype._finish.call(this);
};
Expand Down Expand Up @@ -386,6 +387,7 @@ function parserOnIncomingClient(res, shouldKeepAlive) {


DTRACE_HTTP_CLIENT_RESPONSE(socket, req);
LTTNG_HTTP_CLIENT_RESPONSE(socket, req);
COUNTER_HTTP_CLIENT_RESPONSE();
req.res = res;
res.req = req;
Expand Down
2 changes: 2 additions & 0 deletions lib/_http_server.js
Original file line number Diff line number Diff line change
Expand Up @@ -92,6 +92,7 @@ util.inherits(ServerResponse, OutgoingMessage);

ServerResponse.prototype._finish = function() {
DTRACE_HTTP_SERVER_RESPONSE(this.connection);
LTTNG_HTTP_SERVER_RESPONSE(this.connection);
COUNTER_HTTP_SERVER_RESPONSE();
OutgoingMessage.prototype._finish.call(this);
};
Expand Down Expand Up @@ -416,6 +417,7 @@ function connectionListener(socket) {

res.shouldKeepAlive = shouldKeepAlive;
DTRACE_HTTP_SERVER_REQUEST(req, socket);
LTTNG_HTTP_SERVER_REQUEST(req, socket);
COUNTER_HTTP_SERVER_REQUEST();

if (socket._httpMessage) {
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2 changes: 2 additions & 0 deletions lib/net.js
Original file line number Diff line number Diff line change
Expand Up @@ -387,6 +387,7 @@ Socket.prototype.end = function(data, encoding) {
stream.Duplex.prototype.end.call(this, data, encoding);
this.writable = false;
DTRACE_NET_STREAM_END(this);
LTTNG_NET_STREAM_END(this);

// just in case we're waiting for an EOF.
if (this.readable && !this._readableState.endEmitted)
Expand Down Expand Up @@ -1324,6 +1325,7 @@ function onconnection(err, clientHandle) {
socket.server = self;

DTRACE_NET_SERVER_CONNECTION(socket);
LTTNG_NET_SERVER_CONNECTION(socket);
COUNTER_NET_SERVER_CONNECTION(socket);
self.emit('connection', socket);
}
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12 changes: 12 additions & 0 deletions node.gyp
Original file line number Diff line number Diff line change
Expand Up @@ -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',
Expand Down Expand Up @@ -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)' ],
Expand Down Expand Up @@ -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' ]
}]
Expand Down
8 changes: 8 additions & 0 deletions src/node.cc
Original file line number Diff line number Diff line change
Expand Up @@ -23,6 +23,10 @@
#include "node_dtrace.h"
#endif

#if defined HAVE_LTTNG
#include "node_lttng.h"
#endif

#include "ares.h"
#include "async-wrap.h"
#include "async-wrap-inl.h"
Expand Down Expand Up @@ -2871,6 +2875,10 @@ void LoadEnvironment(Environment* env) {
InitDTrace(env, global);
#endif

#if defined HAVE_LTTNG
InitLTTNG(env, global);
#endif

#if defined HAVE_PERFCTR
InitPerfCounters(env, global);
#endif
Expand Down
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