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[lttng-tools.git] / tests / regression / ust / ust-dl / README
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AB
1UST dynamic linker tracing test
2-------------------------------
3
4This test verifies that the `liblttng-ust-dl.so` helper works as
5intended. Indeed, once preloaded, this helper should produce events
6for all calls made by the application to dlopen along with with extra
7debug information for the given shared object, such as build id or
8debug link if it exists, as well as dlclose.
9
10
11DESCRIPTION
12-----------
13
14The test application is run with the environment variable
15LD_PRELOAD="liblttng-ust-dl.so" to preload the helper. It then dlopens
16a shared library (`libfoo.so`), calls a function from it, and dlclose
17it. This should produce `dlopen` and `dlclose` events, as well as
18`build_id` and `debug_link`, because the shared library has been built
19to contain all this extra debug information.
20
21DEPENDENCIES
22------------
23
24To run this test, you will need:
25
26 - lttng-tools (with python bindings)
27 - babeltrace
28 - python 3.0 or later
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