Commit Graph

228 Commits

Author SHA1 Message Date
Daniel Marjamäki e0be224f4e
Merge pull request #2709 from pfultz2/fp-duplicate-cond-this
Fix FP of duplicateCondition when modifying the this variable
2020-07-13 21:14:58 +02:00
Paul 519f2a537a Format 2020-07-13 13:55:45 -05:00
Paul 450bdfedf3 Fix FP of duplicateCondition when modifying the this variable 2020-07-13 12:40:01 -05:00
Rikard Falkeborn d8e7e9176b Fix FN with known condition and sizeof
cppcheck behaved differently if sizeof was to the left or right of the
comparison. In order to fix this, we cannot break the while loop until
all operands have been processed.
2020-07-10 23:39:16 +02:00
Daniel Marjamäki f56a17bf3d Fixed #8858 (FP: identicalConditionAfterEarlyExit when there is #if) 2020-07-01 07:48:32 +02:00
Paul Fultz II 0832830a95
Fix issue 9721: ValueFlow: Comparison is always false, but ValueFlow says it is always true (#2658) 2020-05-23 07:15:13 +02:00
orbitcowboy 9861a5291e Formatted the code, there are no functional changes [ci skip] 2020-05-20 23:45:00 +02:00
PKEuS fb1afe2345 Fixed test suite: Do no longer apply simplifyTokenList2 to token lists, except for those tests that test those simplifications, because checks are no longer run on that simplified token list
Changed failing unit test to TODO tests, as they indicate patterns we do no longer understand properly.
2020-05-20 18:54:16 +02:00
PKEuS c9d8f607df Optimization: Reduced peak memory usage (30% in my test case) by immediately deleting simplecpp::TokenList while creating the cppcheck TokenList. 2020-05-19 12:08:17 +02:00
Paul Fultz II d123279fc1
Fix issue 9709: ValueFlow: variable value is not known (#2643) 2020-05-14 14:10:32 +02:00
Daniel Marjamäki 08ddd84780 Update copyright year 2020-05-10 11:16:32 +02:00
Daniel Marjamäki 3e0218299b Revert "Update copyright year"
This reverts commit 6eec6c4bd5.
2020-05-10 11:13:05 +02:00
Daniel Marjamäki 6eec6c4bd5 Update copyright year 2020-05-10 11:11:34 +02:00
Paul Fultz II 3773d0e875
Find more redundant conditions (#2597) 2020-04-07 07:15:15 +02:00
Rikard Falkeborn f6e7fb4bd9
Bugfix valuetype for some integer constants (#2545) 2020-02-19 07:51:39 +01:00
Paul Fultz II 7368a54629
Add generic valueflow forward analysis (#2511) 2020-02-13 16:27:06 +01:00
Paul Fultz II 90f82d0374 Fix issue 9541: false negative: knownConditionTrueFalse (#2473)
* Fix issue 9541: false negative: knownConditionTrueFalse

* Add another test case

* Add another test

* Fix FPs

* Format

* Fix compile error

* Remove double conditions

* Fix compile error
2020-01-05 16:25:33 +01:00
Ken-Patrick Lehrmann a9d423eef2 Fix #8938: FP identicalInnerCondition (#2471) 2020-01-04 11:38:56 +01:00
Paul Fultz II dd05839a7e Fix false positives in knownConditionTrueFalse when using expressions with const variables (#2469) 2020-01-03 19:35:28 +01:00
Daniel Marjamäki 31bddb6ae0 astyle formatting
[ci skip]
2019-12-26 15:48:29 +01:00
Paul Fultz II ce1fc56e96 Fix issue 6890: ValueFlow: min/max value for variable, after condition (#2460)
* Set bounds when combining values

* Adust bounds when they are negated

* Try to infer conditional values

* Switch false and true

* Fix checking of conditions

* Fix compare

* Fix remaining tests

* Fix overflows
2019-12-26 15:47:53 +01:00
Paul Fultz II 4aa6385a97 Regression test for 9106: False positive duplicateCondition for struct member (#2434) 2019-12-09 06:51:58 +01:00
Daniel Marjamäki 7cd7aff60a Fixed #9285 (Misleading warning message) 2019-11-16 17:24:54 +01:00
Daniel Marjamäki fadf209e18 Add test for #9326 (FP knownConditionTrueFalse - Returning bool variable treated as condition) 2019-11-03 08:49:39 +01:00
Daniel Marjamäki df8bdabddd Testing; Readded tests 2019-11-03 08:45:34 +01:00
Daniel Marjamäki 9094ff01d3 Fixed #9363 (knownConditionTrueFalse: False positive about function parameter) 2019-10-31 08:34:09 +01:00
Paul Fultz II 0df4876059 Fix issue 9367: FP knownConditionTrueFalse (#2209) 2019-09-24 08:15:03 +02:00
Paul Fultz II a903aa7070 Fix issue 9351: false negative: (style) Condition '...' is always true (#2201) 2019-09-23 08:49:04 +02:00
Paul Fultz II c1961cec1c Fix issue 9362: FP: (style) Condition '(v&1)==0' is always false (#2200) 2019-09-21 19:53:54 +02:00
Paul Fultz II 40f1635c35 Fix issue 9361: false positive: (style) Condition 'isdigit(c)!=0' is always true (#2199) 2019-09-21 08:19:54 +02:00
Paul Fultz II ad8abdb0c3 Add impossible values to ValueFlow (#2186)
* Add impossible category

* Replace values

* Try to adjust known values

* Add ! for impossible values

* Add impossible with possible values

* Remove contradictions

* Add values when the branch is not dead

* Only copy possible values

* Dont bail on while loops

* Load std lib in valueflow

* Check for function calls

* Fix stl errors

* Fix incorrect impossible check

* Fix heap-after-use error

* Remove impossible values when they are lowered

* Show the bound and remove overlaps

* Infer conditions

* Dont push pointer values through dynamic_cast

* Add test for dynamic_cast issue

* Add shifttoomanybits test

* Add test for div by zero

* Add a test for issue 9315

* Dont make impossible value inconclusive

* Fix FP with shift operator

* Improve handleKnownValuesInLoop for impossible values

* Fix cppcheck warning

* Fix impossible values for ctu

* Bailout for streams

* Check equality conditions

* Fix overflows

* Add regression test for 9332

* Remove duplicate conditions

* Skip impossible values for invalid value

* Check for null

* Rename bound to range

* Formatting
2019-09-20 15:06:37 +02:00
Paul Fultz II dc0b3527ad Fix issue 9311: False positive duplicateCondition "same if condition" with pointer inside array of struct (#2166)
* Check for typeOf through an array

* Handle array constructors

* Format

* Fix compile error on gcc 4.8
2019-09-10 19:41:35 +02:00
Paul Fultz II 70cad280ea Fix issue 9319: FP knownConditionTrueFalse related to aggregate initialization of struct (#2147) 2019-09-05 19:36:45 +02:00
Paul Fultz II 9e140831eb Fix issue 9329: FP knownConditionTrueFalse - vector modified by function calls (#2145) 2019-09-05 16:42:26 +02:00
Paul Fultz II ee7fe3aaa1 Fix FP: Unitialized variable when using a pointer
This fixes the FP in cases like this:

```cpp
void f() {
    bool b;
    bool * x = &b;
    if (x != nullptr)
        x = 1;
}
```

It tracks the indirection of the uninit value in valueflow.
2019-08-17 07:36:41 +02:00
Paul Fultz II 3e0d1141d3 Fix issue 9277: FP: Dont warn for knwon conditions in if constexpr (#2085) 2019-08-16 07:56:39 +02:00
Paul Fultz II 0c1dff5c93 Fix issue 9268: false negative: (style) Condition '...' is always true (#2080)
* Fix issue 9268: false negative: (style) Condition '...' is always true

* Fix copy and paste mistake
2019-08-14 06:34:27 +02:00
Paul Fultz II c0c6f92221 Fix issue 8431 and 8776: Size of constant string
Fixes these cases:

```cpp
void f(void) {
        const std::string msg="xyz";
        if(!msg.empty()){} // Always true
}
```

And out of bounds access:

```cpp
#include <string>
char fstr1(){const std::string s = "<a><b>"; return s[42]; }
wchar_t fwstr1(){const std::wstring s = L"<a><b>"; return s[42]; }
```
2019-08-12 20:24:16 +02:00
Paul Fultz II aadc404958 Issue 8634: false negative: (style) Condition '...' is always true (#2075) 2019-08-12 11:04:01 +02:00
Paul Fultz II bd02ca5ccb Fix issue 9207: Not detected 'always true' and unreachable code 2019-08-08 07:46:47 +02:00
Paul Fultz II ffdd2dc793 Fix issue 8924: Re-enable valueFlowTerminatingCondition 2019-08-05 07:18:06 +02:00
Paul Fultz II bb52a63c4e Add check for const variables
When a local reference is declared, this will check if that local reference can be declared as `const`.
2019-07-24 09:59:01 +02:00
Daniel Marjamäki 0eedcfc160 Fixed #7464 (warn about opposite if and else-if conditions) 2019-06-30 23:26:49 +02:00
Daniel Marjamäki 175070ca50 Revert "Fixed #8938 (FP identicalInnerCondition)"
This reverts commit 0edf0b5628.

This bailout seems to cause many false negatives
2019-06-22 21:57:19 +02:00
Daniel Marjamäki 57c6628732 Revert 'Cleaning up unsimplified templates'. This fix caused problems. 2019-05-16 21:11:04 +02:00
Paul Fultz II 195da2b3d2 Fix issue 8993: False positive duplicateCondition related to auto (#1831) 2019-05-14 08:57:36 +02:00
Daniel Marjamäki d58d4273f9 Cleaning up unsimplified templates 2019-05-11 13:00:03 +02:00
Daniel Marjamäki 0e8f2cdf63 Use multiline in testing 2019-04-28 07:48:38 +02:00
Paul Fultz II c4325bbec3 Fix issue 9103: False positive duplicateConditionAssign (#1808)
* Fix issue 9103: False positive duplicateConditionAssign

* Update conditional message
2019-04-26 12:30:41 +02:00
Daniel Marjamäki 76e13c45c7 temporarily disable duplicateConditionalAssign 2019-04-25 07:44:19 +02:00