+
This event has no fields.
-`lttng_ust_statedump:soinfo`::
- Emitted when information about a currently loaded shared object is
- found.
+`lttng_ust_statedump:bin_info`::
+ Emitted when information about a currently loaded executable or
+ shared object is found.
+
Fields:
+
[options="header"]
-|==============================================================
+|==================================================================
| Field name | Description
-| `baddr` | Base address of loaded library
-| `memsz` | Size of loaded library in memory
-| `sopath` | Path to loaded library file
-|==============================================================
+| `baddr` | Base address of loaded executable
+| `memsz` | Size of loaded executable in memory
+| `path` | Path to loaded executable file
+| `is_pic` | Whether the executable is
+ position-independent code
+|==================================================================
`lttng_ust_statedump:build_id`::
Emitted when a build ID is found in a currently loaded shared
cc -o app tp.o app.o -llttng-ust -ldl
-------------------------------------
+Using the man:lttng(1) tool, create an LTTng tracing session, enable
+all the events of this tracepoint provider, and start tracing:
+
+[role="term"]
+----------------------------------------------
+lttng create my-session
+lttng enable-event --userspace 'my_provider:*'
+lttng start
+----------------------------------------------
+
+You may also enable specific events:
+
+[role="term"]
+----------------------------------------------------------
+lttng enable-event --userspace my_provider:big_event
+lttng enable-event --userspace my_provider:event_instance2
+----------------------------------------------------------
+
+Run the application:
+
+[role="term"]
+--------------------
+./app some arguments
+--------------------
+
+Stop the current tracing session and inspect the recorded events:
+
+[role="term"]
+----------
+lttng stop
+lttng view
+----------
+
Tracepoint provider header file
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ENVIRONMENT VARIABLES
---------------------
+`LTTNG_HOME`::
+ Alternative user's home directory. This variable is useful when the
+ user running the instrumented application has a non-writable home
+ directory.
++
+Unix sockets used for the communication between `liblttng-ust` and the
+LTTng session and consumer daemons (part of the LTTng-tools project)
+are located in a specific directory under `$LTTNG_HOME` (or `$HOME` if
+`$LTTNG_HOME` is not set).
+
`LTTNG_UST_DEBUG`::
- Activate `liblttng-ust` debug and error output.
+ Activates `liblttng-ust`'s debug and error output if set to `1`.
`LTTNG_UST_REGISTER_TIMEOUT`::
- Specify how long the applications should wait for the
- _registration done_ session daemon command before proceeding to
- execute the main program (milliseconds).
+ Waiting time for the _registration done_ session daemon command
+ before proceeding to execute the main program (milliseconds).
+
-The value 0 means _do not wait_. The value -1 means _wait forever_.
-Setting this environment variable to 0 is recommended for applications
+The value `0` means _do not wait_. The value `-1` means _wait forever_.
+Setting this environment variable to `0` is recommended for applications
with time constraints on the process startup time.
+
-Default: 3000.
+Default: {lttng_ust_register_timeout}.
`LTTNG_UST_WITHOUT_BADDR_STATEDUMP`::
- Prevent `liblttng-ust` from performing a base address state dump
- (see the <<state-dump,LTTng-UST state dump>> section above).
+ Prevents `liblttng-ust` from performing a base address state dump
+ (see the <<state-dump,LTTng-UST state dump>> section above) if
+ set to `1`.
`LTTNG_UST_GETCPU_PLUGIN`::
Path to the shared object which acts as the `getcpu()` override
projects / lttng-ust.git / blobdiff