3 Futex Test is intended to thoroughly test the Linux kernel futex system call
6 Functional tests shall test the documented behavior of the futex operation
7 code under test. This includes checking for proper behavior under normal use,
8 odd corner cases, regression tests, and abject abuse and misuse.
10 Futextest will also provide example implementation of mutual exclusion
11 primitives. These can be used as is in user applications or can serve as
12 examples for system libraries. These will likely be added to either a new lib/
13 directory or purely as header files under include/, I'm leaning toward the
21 Design and Implementation Goals
22 -------------------------------
23 o Tests should be as self contained as is practical so as to facilitate sharing
24 the individual tests on mailing list discussions and bug reports.
25 o The build system shall remain as simple as possible, avoiding any archive or
26 shared object building and linking.
27 o Where possible, any helper functions or other package-wide code shall be
28 implemented in header files, avoiding the need to compile intermediate object
30 o External dependencies shall remain as minimal as possible. Currently gcc
31 and glibc are the only dependencies.
32 o Tests return 0 for success and < 0 for failure.
36 Test output shall be easily parsable by both human and machine. Title and
37 results are printed to stdout, while intermediate ERROR or FAIL messages are
38 sent to stderr. Tests shall support the -c option to print PASS, FAIL, and
39 ERROR strings in color for easy visual parsing. Output shall conform to the
42 test_name: Description of the test
43 Arguments: arg1=val1 #units specified for clarity where appropriate
44 ERROR: Description of unexpected error
45 FAIL: Reason for test failure
46 # FIXME: Perhaps an " INFO: informational message" option would be
47 # useful here. Using -v to toggle it them on and off, as with -c.
48 # there may be multiple ERROR or FAIL messages
49 Result: (PASS|FAIL|ERROR)
53 o FIXME: decide on a sane test naming scheme. Currently the tests are named
54 based on the primary futex operation they test. Eventually this will become a
55 problem as we intend to write multiple tests which collide in this namespace.
56 Perhaps something like "wait-wake-1" "wait-wake-2" is adequate, leaving the
57 detailed description in the test source and the output.
61 o The Futex Test project adheres to the coding standards set forth by Linux
62 kernel as defined in the Linux source Documentation/process/coding-style.rst.