On 09/03/2012 10:23 AM, stephane eranian wrote:
> Will,
>
> I have fixed most of the warnings reported by your tool.
> Please pull and try again.
>
>
> On Tue, Aug 28, 2012 at 9:17 PM, William Cohen <wco...@redhat.com> wrote:
>> On 08/28/2012 12:03 PM, stephane eranian wrote:
>>> On Tue, Aug 28, 2012 at 4:45 PM, William Cohen <wco...@redhat.com> wrote:
>>
>>>>
>>>> Would it be possible to do the ldconf separately from the "make install"?
>>>> The rpm packages are built as normal users with a staged install and the
>>>> ldconf is done as a post install operation. The ldconf in the makefile
>>>> needed to be disabled for the libpfm rpm to be built.
>>>>
>>> I just updated the libpfm.spec today to convert ldconfig to a nop
>>> (LDCONFIG=true), so
>>> it should not perturb the generation of the RPM. At least, it did not
>>> for me when I tried
>>> on Fedora 16.
>>>
>>
>> Hi Stephane,
>>
>>
>> Thanks for the libpfm.spec. The fedora rawhide libpfm-4.3.0 doesn't have any
>> patches in it now:
>>
>> http://koji.fedoraproject.org/koji/taskinfo?taskID=4432221
>>
>> I ran libpfm through coverity to see whether there were any serious problems
>> with it. Attached is the output of coverity. All errors are in the
>> generated swig code and the examples. Probably can't do much about the swig
>> related error because there are all in generated code. The examples could be
>> cleaned up a little, but those are not packaged in the libpfm rpms, so those
>> are not a great problem.
>>
>> In perf_setup_list_events() in perf_util.c why not make the for loop
>> replace the ',' with '\0' the same structure as the earlier while loop
>> counting the args? That would make the code a bit easier to read and
>> eliminate one of the coverity errors.
>> .
>> -Will
Hi Stephane,
The results are improved. Most all the ones remaining are in the python swig
wrappers. The one that isn't in the swig wrappers is:
Error: NULL_RETURNS (CWE-476):
/builddir/build/BUILD/libpfm-4.3.0/examples/showevtinfo.c:659: example_assign:
Assigning: "p" = return value from "strchr(arg, 44)".
/builddir/build/BUILD/libpfm-4.3.0/examples/showevtinfo.c:660: example_checked:
"p" has its value checked in "p".
/builddir/build/BUILD/libpfm-4.3.0/lib/pfmlib_common.c:476: example_assign:
Assigning: "p" = return value from "strchr(pfm_cfg.forced_pmu, 44)".
/builddir/build/BUILD/libpfm-4.3.0/lib/pfmlib_common.c:477: example_checked:
"p" has its value checked in "p".
/builddir/build/BUILD/libpfm-4.3.0/lib/pfmlib_common.c:970: example_assign:
Assigning: "p" = return value from "strchr(s, 44)".
/builddir/build/BUILD/libpfm-4.3.0/lib/pfmlib_common.c:971: example_checked:
"p" has its value checked in "p".
/builddir/build/BUILD/libpfm-4.3.0/perf_examples/perf_util.c:127:
example_checked: "strchr(q, 44)" has its value checked in "p = strchr(q, 44)".
/builddir/build/BUILD/libpfm-4.3.0/perf_examples/perf_util.c:141:
returned_null: Function "strchr" returns null (checked 4 out of 5 times).
/builddir/build/BUILD/libpfm-4.3.0/perf_examples/perf_util.c:141: var_assigned:
Assigning: "p" = null return value from "strchr".
/builddir/build/BUILD/libpfm-4.3.0/perf_examples/perf_util.c:142: dereference:
Dereferencing a null pointer "p".
Earlier in the code have:
q = events;
while((p = strchr(q, ','))) {
num++;
q = p + 1;
}
num++;
num++; /* term
Why not code the following for loop:
for(i=0, q = events; i < num-2; i++, q = p + 1) {
p = strchr(q, ',');
*p = '\0';
argv[i] = q;
}
argv[i++] = q;
argv[i] = NULL;
to mirror the earlier loop so the strchr value is checked? So make the for loop
into something like:
q = events;
i = 0;
while((p = strchr(q, ','))) {
*p = '\0';
i++;
q = p + 1;
}
argv[i++] = q;
argv[i] =NULL; /* terminator */
-Will
Error: DEADCODE (CWE-561):
/builddir/build/BUILD/libpfm-4.3.0/python/src/perfmon_int_wrap.c:2394:
dead_error_condition: On this path, the condition "ty" cannot be false.
/builddir/build/BUILD/libpfm-4.3.0/python/src/perfmon_int_wrap.c:2391:
cannot_single: After this line (or expression), the value of "ty" cannot be 0.
/builddir/build/BUILD/libpfm-4.3.0/python/src/perfmon_int_wrap.c:2404:
dead_error_line: Execution cannot reach this statement "*ptr = vptr;".
Error: NULL_RETURNS (CWE-476):
/builddir/build/BUILD/libpfm-4.3.0/examples/showevtinfo.c:659: example_assign:
Assigning: "p" = return value from "strchr(arg, 44)".
/builddir/build/BUILD/libpfm-4.3.0/examples/showevtinfo.c:660: example_checked:
"p" has its value checked in "p".
/builddir/build/BUILD/libpfm-4.3.0/lib/pfmlib_common.c:476: example_assign:
Assigning: "p" = return value from "strchr(pfm_cfg.forced_pmu, 44)".
/builddir/build/BUILD/libpfm-4.3.0/lib/pfmlib_common.c:477: example_checked:
"p" has its value checked in "p".
/builddir/build/BUILD/libpfm-4.3.0/lib/pfmlib_common.c:970: example_assign:
Assigning: "p" = return value from "strchr(s, 44)".
/builddir/build/BUILD/libpfm-4.3.0/lib/pfmlib_common.c:971: example_checked:
"p" has its value checked in "p".
/builddir/build/BUILD/libpfm-4.3.0/perf_examples/perf_util.c:127:
example_checked: "strchr(q, 44)" has its value checked in "p = strchr(q, 44)".
/builddir/build/BUILD/libpfm-4.3.0/perf_examples/perf_util.c:141:
returned_null: Function "strchr" returns null (checked 4 out of 5 times).
/builddir/build/BUILD/libpfm-4.3.0/perf_examples/perf_util.c:141: var_assigned:
Assigning: "p" = null return value from "strchr".
/builddir/build/BUILD/libpfm-4.3.0/perf_examples/perf_util.c:142: dereference:
Dereferencing a null pointer "p".
Error: RESOURCE_LEAK (CWE-404):
/builddir/build/BUILD/libpfm-4.3.0/python/src/perfmon_int_wrap.c:10327:
alloc_fn: Calling allocation function "malloc".
/builddir/build/BUILD/libpfm-4.3.0/python/src/perfmon_int_wrap.c:10327:
var_assign: Assigning: "arg3" = storage returned from "malloc(80UL)".
/builddir/build/BUILD/libpfm-4.3.0/python/src/perfmon_int_wrap.c:10328:
noescape: Variable "arg3" is not freed or pointed-to in function "memset".
/builddir/build/BUILD/libpfm-4.3.0/python/src/perfmon_int_wrap.c:10376:
leaked_storage: Variable "arg3" going out of scope leaks the storage it points
to.
Error: RESOURCE_LEAK (CWE-404):
/builddir/build/BUILD/libpfm-4.3.0/python/src/perfmon_int_wrap.c:9921:
alloc_fn: Calling allocation function "malloc".
/builddir/build/BUILD/libpfm-4.3.0/python/src/perfmon_int_wrap.c:9921:
var_assign: Assigning: "arg2" = storage returned from "malloc(56UL)".
/builddir/build/BUILD/libpfm-4.3.0/python/src/perfmon_int_wrap.c:9922:
noescape: Variable "arg2" is not freed or pointed-to in function "memset".
/builddir/build/BUILD/libpfm-4.3.0/python/src/perfmon_int_wrap.c:9930:
noescape: Variable "arg2" is not freed or pointed-to in function
"pfm_get_pmu_info".
/builddir/build/BUILD/libpfm-4.3.0/lib/pfmlib_common.c:1553:51: noescape:
"pfm_get_pmu_info" does not free or save its pointer parameter "uinfo".
/builddir/build/BUILD/libpfm-4.3.0/python/src/perfmon_int_wrap.c:9953:
leaked_storage: Variable "arg2" going out of scope leaks the storage it points
to.
Error: RESOURCE_LEAK (CWE-404):
/builddir/build/BUILD/libpfm-4.3.0/python/src/perfmon_int_wrap.c:10018:
alloc_fn: Calling allocation function "malloc".
/builddir/build/BUILD/libpfm-4.3.0/python/src/perfmon_int_wrap.c:10018:
var_assign: Assigning: "arg3" = storage returned from "malloc(64UL)".
/builddir/build/BUILD/libpfm-4.3.0/python/src/perfmon_int_wrap.c:10019:
noescape: Variable "arg3" is not freed or pointed-to in function "memset".
/builddir/build/BUILD/libpfm-4.3.0/python/src/perfmon_int_wrap.c:10032:
noescape: Variable "arg3" is not freed or pointed-to in function
"pfm_get_event_info".
/builddir/build/BUILD/libpfm-4.3.0/lib/pfmlib_common.c:1428:60: noescape:
"pfm_get_event_info" does not free or save its pointer parameter "uinfo".
/builddir/build/BUILD/libpfm-4.3.0/python/src/perfmon_int_wrap.c:10055:
leaked_storage: Variable "arg3" going out of scope leaks the storage it points
to.
Error: RESOURCE_LEAK (CWE-404):
/builddir/build/BUILD/libpfm-4.3.0/python/src/perfmon_int_wrap.c:10137:
alloc_fn: Calling allocation function "malloc".
/builddir/build/BUILD/libpfm-4.3.0/python/src/perfmon_int_wrap.c:10137:
var_assign: Assigning: "arg4" = storage returned from "malloc(64UL)".
/builddir/build/BUILD/libpfm-4.3.0/python/src/perfmon_int_wrap.c:10138:
noescape: Variable "arg4" is not freed or pointed-to in function "memset".
/builddir/build/BUILD/libpfm-4.3.0/python/src/perfmon_int_wrap.c:10156:
noescape: Variable "arg4" is not freed or pointed-to in function
"pfm_get_event_attr_info".
/builddir/build/BUILD/libpfm-4.3.0/lib/pfmlib_common.c:1486:84: noescape:
"pfm_get_event_attr_info" does not free or save its pointer parameter "uinfo".
/builddir/build/BUILD/libpfm-4.3.0/python/src/perfmon_int_wrap.c:10179:
leaked_storage: Variable "arg4" going out of scope leaks the storage it points
to.
Error: UNUSED_VALUE (CWE-563):
/builddir/build/BUILD/libpfm-4.3.0/python/src/perfmon_int_wrap.c:2774:
returned_pointer: Pointer "tmp" returned by "SWIG_Python_str_AsChar(old_str)"
is never used.
Error: UNUSED_VALUE (CWE-563):
/builddir/build/BUILD/libpfm-4.3.0/python/src/perfmon_int_wrap.c:2776:
returned_pointer: Pointer "tmp" returned by "SWIG_Python_str_AsChar(old_str)"
is never used.
Error: UNUSED_VALUE (CWE-563):
/builddir/build/BUILD/libpfm-4.3.0/python/src/perfmon_int_wrap.c:11131:
returned_pointer: Pointer "tmp" returned by "SWIG_Python_str_AsChar(str)" is
never used.
Error: UNUSED_VALUE (CWE-563):
/builddir/build/BUILD/libpfm-4.3.0/python/src/perfmon_int_wrap.c:1005:
returned_pointer: Pointer "tmp" returned by "SWIG_Python_str_AsChar(old_str)"
is never used.
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