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Safety-check: only call register_lib if found in liblttng-ust-tracepoint.so.0
[lttng-ust.git]
/
README
diff --git
a/README
b/README
index 8193c6603837940ffc2cade120ef4dc867b638fe..1ff23f69bf29a4bbb9df4e2d5b2ddf7d596922fa 100644
(file)
--- a/
README
+++ b/
README
@@
-16,7
+16,7
@@
PREREQUISITES:
- liburcu
Userspace RCU library, by Mathieu Desnoyers and Paul E. McKenney
- liburcu
Userspace RCU library, by Mathieu Desnoyers and Paul E. McKenney
- -> This release depends on liburcu v0.
6.6
+ -> This release depends on liburcu v0.
7.2
* Debian/Ubuntu package: liburcu-dev
* Website: http://lttng.org/urcu
* Debian/Ubuntu package: liburcu-dev
* Website: http://lttng.org/urcu
@@
-24,6
+24,9
@@
PREREQUISITES:
* GitWeb: http://lttng.org/cgi-bin/gitweb.cgi?p=userspace-rcu.git;a=summary
* Git: git://lttng.org/userspace-rcu.git
* GitWeb: http://lttng.org/cgi-bin/gitweb.cgi?p=userspace-rcu.git;a=summary
* Git: git://lttng.org/userspace-rcu.git
+ - libuuid (for Linux)
+ * Debian/Ubuntu package: libuuid1, uuid-dev
+
For developers using the git tree:
This source tree is based on the autotools suite from GNU to simplify
For developers using the git tree:
This source tree is based on the autotools suite from GNU to simplify
@@
-75,7
+78,7
@@
USAGE:
- Include the tracepoint provider header into all C files using
the provider.
- Example:
- 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:
2) Compile the Tracepoint Provider separately from the application,
using dynamic linking:
@@
-97,6
+100,10
@@
USAGE:
- Enable instrumentation and control tracing with the "lttng" command
from lttng-tools. See lttng-tools doc/quickstart.txt.
- 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:
ENVIRONMENT VARIABLES:
@@
-113,6
+120,10
@@
ENVIRONMENT VARIABLES:
recommended for applications with time constraints on the process
startup time.
recommended for applications with time constraints on the process
startup time.
+ - The compilation flag "-DLTTNG_UST_DEBUG_VALGRIND" should be enabled
+ at build time to allow liblttng-ust to be used with valgrind
+ (side-effect: disables per-cpu buffering).
+
TRACE VIEWER:
TRACE VIEWER:
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