X-Git-Url: http://git.lttng.org/?a=blobdiff_plain;ds=sidebyside;f=README;h=71bae95b6d62303a9261a754dbefc44c3897a008;hb=refs%2Fheads%2Fstable-2.1;hp=9d4603bce79b2ccd7a0a9bb10b1d787757915722;hpb=a445aa84ce26397994ef76500c193990b3d43d1e;p=lttng-ust.git diff --git a/README b/README index 9d4603bc..71bae95b 100644 --- a/README +++ b/README @@ -25,6 +25,7 @@ PREREQUISITES: * Git: git://lttng.org/userspace-rcu.git - libuuid (for Linux) + * Debian/Ubuntu package: libuuid1, uuid-dev For developers using the git tree: @@ -73,11 +74,11 @@ USAGE: - If building the provider directly into the application, link the application with "-llttng-ust". - If building a static library for the provider, link the static - library with "-lllttng-ust". + library with "-llttng-ust". - Include the tracepoint provider header into all C files using the provider. - Example: - tests/hello/ hello.c tp.c ust_tests_hello.h Makefile.example.* + - tests/hello/ hello.c tp.c ust_tests_hello.h Makefile.example.* 2) Compile the Tracepoint Provider separately from the application, using dynamic linking: @@ -99,6 +100,10 @@ USAGE: - Enable instrumentation and control tracing with the "lttng" command from lttng-tools. See lttng-tools doc/quickstart.txt. + - Note about dlclose() usage: it is not safe to use dlclose on a + provider shared object that is being actively used for tracing due + to a lack of reference counting from lttng-ust to the used shared + object. ENVIRONMENT VARIABLES: