[RFC 3/3] Test on solib load and unload

[Yao Qi]

On 09/20/2013 06:44 AM, Doug Evans wrote:
>   > +standard_testfile .c
>   > +set executable $testfile
>   > +set expfile $testfile.exp
>   > +
>   > +# make check RUNTESTFLAGS='solib.exp SOLIB_NUMBER=1024'
>
> SOLIB_NUMBER doesn't read very well.
> How about NUM_SOLIBS?
>

I should mention the naming convention I used here before.  It is
"TEST_PARAMETER".  "SOLIB" is like a name space, and all variables used 
in this test should be prefixed by "SOLIB_".  I tried "." to replace 
"_", but "." is not allowed to use.

If we write a test case on backtrace, and we need variable to control 
the depth of bt, we can name it "BACKTRACE_DEPTH".

>   > +if ![info exists SOLIB_NUMBER] {
>   > +    set SOLIB_NUMBER 128
>   > +}
>   > +
>   > +for {set i 0} {$i < $SOLIB_NUMBER} {incr i} {
>   > +
>   > +    # Produce source files.
>   > +    set libname "solib-lib$i"
>   > +    set src [standard_temp_file $libname.c]
>   > +    set exe [standard_temp_file $libname]
>   > +
>   > +    set code "int shr$i (void) {return $i;}"
>   > +    set f [open $src "w"]
>   > +    puts $f $code
>   > +    close $f
>
> IWBN if the test harness provided utilities for generating source
> files instead of hardcoding the generating of them in the test.
> Parameters to such a set of functions would include things like the name
> of a high level entry point (what one might pass to dlsym), the number
> of functions in the file, the number of classes, etc.
>

IMO, it is not the perf test framework's responsibility to generate
source files and I am not sure the utilities like these can be reused
by other tests.

We can add a new proc gdb_produce_source with two parameters, NAME and 
SOURCES.  NAME is the file name and SOURCES is a list of lines of source 
code we want to write to file NAME.  For instance,

    gdb_produce_source $src { "int shr$i (void) {return 0;}" }

It can be used here and replace some code in gdb.exp.

-- 
Yao (齐尧)