Make the MISRA addon emit extra warnings for unused arguments placed in
lines other than the function definition. This makes it easier for the
user to find violations.
The MISRA 2012 standard does not say anything about variadic functions
in the definition of rule 2.7. Therefore, these cases should be
considered as false positives.
The example code that reproduces this crash:
```
int misra_8_2_o(
const uint32_t a1,
const uint8_t *const a2
)
{ return *a2 + a1; }
int misra_8_2_p(
const uint32_t a1,
const uint8_t *const a2
);
```
The unit test was not added because it looks like a typo and regressions
are unlikely.
* misra: Fix 8.2 false positives
Fix false positives in rule 8.2 that occurred in cases when we have a
function definition and declaration in the same file.
For example, the following code generated false positives before this
commit:
```
void f(uint8_t * const x);
void f(uint8_t * const x)
{ (void)x; }
```
We need to distinguish the declaration and the definition, so the dump
file generation routine was extended to keep token where the definition
of the function. The analysis in the addon also been improved.
Closes Trac issue: https://trac.cppcheck.net/ticket/10219
This fixes the crash on with struct fields containing unknown types
reported on the forum:
https://sourceforge.net/p/cppcheck/discussion/general/thread/d64551cc55/#5f0f
The suggested patch doesn't handle the cases when there are struct
fields with arrays containing unknown types. So the addon will not
generate warnings in these cases. The problem is that Cppcheck doesn't
generate valueType-pointer information for unknown types in the dump
file. When adding this in symboldatabase.cpp, MISRA addon will generate
a lot of false positives because we depend on the null value of
valueType.
So I suppose it better to left this as is, to don't break the addon for
such rare cases.
This commit allows to specify expected suppressions in the included
header files. This is necessary to verify MISRA checkers, which make
requirements for header files. For example, Rule 8.2 requires adding
prototypes for each function to the header files.
This commit makes CppcheckData class to use instance attributes instead
of class attributes.
Since class attributes are mutable (list), when you append to them, they
don't promote to instance variable which means when you call parsedump()
multiple times data just gets appended to them.
Found by samed on the forum:
https://sourceforge.net/p/cppcheck/discussion/general/thread/c6e1210ec2/
Fix false positives for the function calls with "const pointer to const
value" arguments: https://trac.cppcheck.net/ticket/9967.
The variable.valueType.constness have same encoding as encoding as
ValueType::constness in Cppcheck.
C89 standard defines enum members as enumeration contants at ch.
6.4.4.3, and they are always known at compile time.
This commit fix false positives for rule 18.8 (and possible other rules
that check "constentess") with enumeration members.
Fix Trac#9913
When we include the header file with variables definitions, Cppcheck
will write `variables` entries with line numbers from the header to the
dump file.
If the line number in the header file and the source file are equal,
misra.py performs an additional check what leads to false positives.
Minimal example that demonstrates the problem:
`misra_fp.c`:
```c
void test_12_3_fp(void)
{
//Initialize the events queue
QEQueue_init(&me->deferred_event_queue, me->deferred_events_queue_buf, Q_DIM(me->deferred_events_queue_buf));
}
```
`misra_fp.h`:
```c
static const uint32_t timer_max_blocking_call_us;
```
This commit closes trac ticket 9874.
When checking multiple files if the same violation is encountered from
an included file then the violation is both displayed and counted in the
error summary.
Track each violation by location and error number and if the violation
has been previously encountered then do not report it again.
This commit add two additional cases for rule 20.3:
1. Support violations in the following format: `#include file.h`
2. Better multiline include directives and inline comments support.
See added test cases for examples.
Define different sets of reserved keywords for C90 and C99.
This will fix false negative for compliant example, defined in MISRA
document, and close trac 9506.
* parser: Parse standards node at start event
This required, because we can loose data at the end event.
* misra.py: Fix 5.4 standard-dependent error
By default Cppcheck use C11 standard, so this change fix false positives
for rule 5.4 with C99.
* travis: force --std=c89 for misra.py
* addons: Reduce memory consumption
Parse dump files incrementaly using ElementTree.iterparse. Clean unused
resources during parsing. This method is explained in following
article: https://www.ibm.com/developerworks/xml/library/x-hiperfparse/
Memory consumption was reduced about 30% (measured with mprof),
execution time increased about 5% (measured with time utility).
More description available in PR.
* Switch to lxml and update iterparse routines
Use lxml module instead default xml.etree. Lxml provides convenient
wrappers around iterparse method that accepts `tag` argument. That
easer incremental parsing routines to select specific tags from roottree
like `dump` and `dumps`.
Element.clear() method was replaced by `lxml_clean` because lxml
keeps additional information to nodes that should be removed.
Added note about large consumption RAM on large dump files.
This commit doesn't solve this problem completely, but provides a way
to improve current parser to add incremental Configuration serialization
later.
* Working on iterative parser
* Added iterative Configurations parser
* fix
* Fix varlist iteration
* make sure that standards node was loaded
This commit will add feature to detect essential type categories
for operators of ternary operation.
This fixes issues with rule 10.1 and close the following ticket:
https://trac.cppcheck.net/ticket/9543
* misra.py: Allow executeCheck take multiple args
* misra.py: Fix R12.3 FN in variables declaration
Make rule 12.3 check detect commas in variables declaration code.
* Fix excluded lines
* Add support for global variables
* Fix FN when linenr from other file was excluded
* Add a few more tests
* Handle more cases
Handle additional cases to check commans in variables declaration
including:
* multiline variables declaration
* functions and structures initialized in the same line
* expanding macroses in initialization
* Fix FP in global struct initialization
* Add another test
This commit fixes __repr__ methods introduced in d538315268. Fields that recursively links to other cppcheckdata objects was removed to avoid max recursion depth crash on printing.
* misra.py: R14.2: Verify for counter modification
Add additional check to detect modification of loop counter in loop
body. Related issue: https://trac.cppcheck.net/ticket/9490
Add small fix that treat all assignment operators defined in N1750
6.5.16 as has side affects. This will affects rules 13.1, 13.3, 13.5
and allow to catch some false negatives.
* Add tests for fixed FPs for R13.{1,5,6}
* fix
* use isAssignmentOp from cppcheck data
* remove unused set
* handle case with empty body or syntax error
* add test with outer variable
* Fix FP in nested loops, add tests
* Fix FP on outer variables
* Fixup false positives for not loop counters
* y2038 addon: Fix that check can never return True, add tests
At the beginning of `check_y2038_safe()` the variable `y2038safe` should
be initialized with `True` and only be set to `False` if there are any
issues. Otherwise it could never become `True`.
In the unit tests the return value of `check_y2038_safe()` is now
verified. But it does not yet work for the "good" example. The "good"
example also returns `False` since it finds warnings in the include
file. So this verification is marked with a "FIXME" comment.
* y2038 tests: Add "good" test file that does not use time functionality
The test file y2038-test-5-good-no-time-used.c does not use any time
functionality so the y2038 addon is not allowed to issue any warnings
and the check must return with `True` (code is safe).
Fixed usage of hasSideEffectsRecursive which was causes crashes
of rules 12.4 and 13.1.
Add more tests for these rules.
See trac ticket: https://trac.cppcheck.net/ticket/9487
Add some more tests for rule 10.1. They are given as examples in the
MISRA document. The 10.1 test that causes a false positive for 10.6 can be
found under the 10.6 tests.
Track ticket for false positive:
https://trac.cppcheck.net/ticket/9488
Trac ticket for the false negative:
https://trac.cppcheck.net/ticket/9489
* cert.py: Add ENV33-C-EX1 exception
ENV33-C-EX1: It is permissible to call system() with a null pointer
argument to determine the presence of a command processor for the
system. [1]
[1]: https://wiki.sei.cmu.edu/confluence/pages/viewpage.action?pageId=87152177
* Handle different null-pointer constants
* cppcheck.cpp: Check for JSON error when parsing addon .json files
This fixes that errors in JSON files given via `--addon=*.json` are
silently ignored and maybe only a part of the JSON file is used.
Now the error message which picojson can return is checked and a
corresponding error message is returned again by getAddonInfo().
* naming.json: Fix missing comma
* CLI: Fix naming violations detected by addon naming.py via naming.json
* Addon naming: Add argument for validating names of constants
* LIB: Rename functions/variables so they are valid, loosen naming rules
* GUI: Fix naming violations
The unused argument causes the new check for rule 2.7 to output an error
here.
I verified that the regression test still works without the unused
argument (misra.py would still crash).
Travis should be happy again.
* Add check for MISRA-C 2012 Rule 2.7 and test cases.
* Cast unused function parameters of some test patterns to "void".
* Fix function parameter void cast in "misra_17_6". Add comment to "misra_11_7_extra" to make all function parameter void casts look alike.
Use Python 3 instead of Python 2 if addons are executed directly.
Running cert.py and misra.py against test/cfg/std.c.dump shows that
Python 3 needs only half the time compared to Python 2. I have tested
it repeatedly and the results are always the same. This is no surprise
at all. The memory footprint is very likely also significantly better
but i have not tested it.
* addons: Add '--recursive' arg. Clean up and clarify errors messages.
This commit introduce '--recursive' option for cppcheck addons.
Iff this option is set addon will recursively traverse directories in
given input files to find files with '.dump' suffix that would be
checked. Otherwise it will treat input directory as error (current
behaviour).
Add additional error handling with more clear error messages, clean up
the code.
* Add regex specifier
* Roll back --recursive option
* Update addons section in manual
Rule 21.1 now doesn't report errors on usage of library functions
started from underscore (e.g. `_exit') and valid errno assignment.
See added tests for examples.
Fix R16.3 state machine which doesn't report errors in last case/default
statemenet. See added tests for examples.
Issue on trac: https://trac.cppcheck.net/ticket/8548
* misra.py: Fix large memory usage with suppressions
Don't save whole lxml locations when collecting rules suppressions
statistics. This fixes the problem with large memory usage when
some rules are suppressed.
See issue description:
https://sourceforge.net/p/cppcheck/discussion/development/thread/51fc053626/
* don't override 'file' builtin
These changes will improve misra.py execution time in the
case where we use globally suppressed checks. For example, when using
single MISRA rule and suppress others, we could get about twice the
execution speed, since most of `MisraChecker' class methods will not
be started at all.
Some measurements and discussion are available at:
https://github.com/danmar/cppcheck/pull/2301
Daniel Marjamäki
Georgiy Komarov
Ivar Andreas Bonsaksen
Paul Fultz II
Lars Even Almaas
JuPrgn
Oliver Stöneberg
Armin Müller
kskjerve
Lars Even Almaas
amai2012
Richard A. Smith
Carl-Oskar Larsson
Ken-Patrick Lehrmann
felwolff
fuzzelhjb
mlambacher
elfel19
Francesc Elies
Sebastian
Mathias Schmid
Conrado Gouvea