34330b51d1
Fix issue 8905: Condition 'a==0' is always false
...
This fixes the FP in:
```cpp
void f(const int a[]){ if (a == 0){} }
```
2018-12-18 08:16:43 +01:00
025881cf35
Fix issue 8829: Condition '...' is always true (int buf[42]; if(buf != NULL){})
...
This makes arrays non-null in valueflow, so it can catch comparisons against null that is always true:
```cpp
void f(void) {
int buf[42];
if( buf != 0) {;} // << always true
}
```
2018-12-17 06:07:34 +01:00
5a6f9ac82a
Fix FP with strcmp and terminating conditions
2018-11-27 06:39:29 +01:00
f0c86b9d14
Fix issue 8842: Crash in valueFlowTerminatingCondition on incomplete code ( #1480 )
2018-11-14 06:23:45 +01:00
e46691597e
Fix issue 8841: FP knownConditionTrueFalse - Dont treat unknown function as noreturn ( #1474 )
...
* Fix issue 8841: Dont treat unknown function as noreturn
* Add a parameter to set default value when the function is unknown
2018-11-11 08:04:01 +01:00
36e663e250
Fix issue 8839: FP knownConditionTrueFalse - condition inside a while-clause ( #1469 )
2018-11-09 06:09:51 +01:00
7373be2bfa
Add a pass in valueflow for terminating conditions ( #1323 )
...
* Add valueflow for terminating conditions
* Add valueflow test
* Dont check for same expressions for now to avoid double diagnostics
* Check nesting
* Add more tests
* Ensure conditions happen in order
* Check for null
* Add error path
* Support same expression check as well
* Use early continue
* Skip checking the same token
* Avoid double condtion diagnosis
* Fix FP when in switch statements
* Fix FP when time function
* Skip conditional escapes
* Use simpleMatch
* Fix naming
* Fix typo
2018-11-07 06:49:07 +01:00
e53be26f48
Try to fix Travis
2018-11-02 19:04:21 +01:00
fafd0742d4
Fix FPs with return conditions ( #1455 )
...
* Fix 8815: FP with identical inner conditions
* Fix issue 8801: FP when not returning a bool
* Fix FP
* Add missing semicolon
* Move returnVar
2018-10-31 09:47:48 +01:00
b8e8b12783
Fixed #8797 (exprDependsOnThis handle method call in non-inline method)
2018-10-24 20:17:00 +02:00
2348dcde6c
#8801 : Quick fix for false positives
2018-10-24 19:57:50 +02:00
edde0eedaa
Fix FP issue 8801: Condition 'a+b' is always true ( #1444 )
2018-10-21 08:04:00 +02:00
29feaa5a51
Tokenizer: Avoid constant folding
2018-10-20 10:51:50 +02:00
40cb9cb1bc
Check conditions in return statements ( #1411 )
...
* Identify return conditions in multiconditions
* Improve error messages
* Check return statements are always true or false
* Add more tests for FPs
* Fix FP when returning const like variables
* Fix FP when returning pointers or classes
* Fix FP with member variable access
* Check non-local variables
* Use simplematch
* Check for null
2018-10-18 21:01:47 +02:00
f961324d45
Fixed #8735 (FP oppositeInnerCondition - regression)
2018-10-07 18:30:29 +02:00
e170a45230
Enable followVar for opposite expressions ( #1404 )
...
Enable followVar for opposite expressions
2018-10-04 21:17:47 +02:00
1fe1ec09a8
Reenable follow var for logical conjunction ( #1400 )
2018-10-01 14:40:03 +02:00
2c91b95d2a
Reenable followVar for multicondition ( #1401 )
2018-10-01 14:34:55 +02:00
f65cf220ba
Fix false positives in unknownEvaluationOrder when using followVar ( #1391 )
...
Fix false positives in unknownEvaluationOrder when using followVar
2018-09-28 08:38:24 +02:00
afe09f4d7a
Temporarily comment out the followVariable() handling
2018-09-23 16:03:18 +02:00
fa40b821e6
Fix issue 8740: Add a pass to check for valid operators ( #1372 )
2018-09-08 21:10:34 +02:00
cb03b9883f
Fix issue 8737: FP with identical inner condition due to followVar ( #1371 )
2018-09-07 20:16:38 +02:00
5a2362b2a0
Fix issue 8738: Dont warn about multiconditions when value is known ( #1369 )
2018-09-07 15:02:34 +02:00
2da958efb5
Fix issue 8722: Avoid duplicate messages due for followVar ( #1367 )
2018-09-06 06:55:36 +02:00
08f301a0de
Reenable followVar ( #1363 )
...
Reenable followVar
2018-09-05 05:53:33 +02:00
a331206b44
Temporarily disable followVariableExpressions(), there are problems that should be fixed.
2018-09-01 08:32:06 +02:00
fc135e1087
Check if member function modifies the variable ( #1350 )
...
* Check if member function modifies the variable
* Check for const pointer
* Add test for const condition
* Add more null checking
* Add todo assert for FN
2018-08-27 11:09:09 +02:00
3947c23290
Fix issue 8369: False negative: Condition 'condition' is always true ( #1325 )
...
* Fix issue 8369: False negative: Condition 'condition' is always true
* Use simpleMatch
* Add iterator header
* Cleanup
* Remove unused variable
2018-08-10 18:05:23 +02:00
f603b529df
Fix issue 8413: Condition is always false 'i=expr; if (i != expr) {}' ( #1295 )
...
* Follow variables when comparing same expression
* Remove assert include
* Dont follow function arguments
* Improve the checking to check more cases
* Add more tests
* Check if the variable is used inside a loop
* Follow both variables
* Only skip loops when variable is modified in scope
* Fix FP when followed variable is modified
* Dont follow arrays
* Skip pointer indirection
* Make recursive
* Improve checking more variables
* Fix test with sizeof
* Skip following operators
* Fix test when using sizeof
* Dont check every step
* Use early returns
* Update test to use a loop instead of conditional
* Add static
* Check variables are global
* Check local variables in another scope
* Fix issue with const pointers
* Distinguish between pointer indirection and multiply
* Use simple match
* Prevent crash with uniform initialization
* Use unary op and ast to detect pointer indirection
* Expand error message when expression do not match exactly
* Add errorpath to issameexpression
* Revert "Clarify warning message for 'Same expression on both sides of operator'"
This reverts commit 0e491b41a8
2018-08-07 09:32:16 +02:00
1b933f4dd1
astyle formatting
...
[ci skip]
2018-08-05 22:40:21 +02:00
b839ad60dd
Fix issue 6856: add checks in isOppositeCond when using == and < or > ( #1298 )
...
* Fix issue 6856: add checks in isOppositeCond when using == and < or >
* Move tests to testcondition
* Fix some more tests
* Fix test messages
* Remove the float check
2018-08-05 22:39:40 +02:00
9895ea5ff2
Fix issue 470: Condition is always true or false on logical operators ( #1294 )
...
* Fix issue 470: Condition is always true or false on logical operators
* Dont warn on literals
* Compute logical operators using valueflow
* Fix FP when using literals
* Always warn on subconditions that are always true
* Use percent matches first
* Add test for logical operators
* Check if parent is null
2018-07-23 08:51:59 +02:00
77b653bf94
Clarify warnings when char literals are converted to bool in conditions
2018-07-21 18:40:06 +02:00
5d1fdf7958
Fix issue 7904: Handle double nots in isSameExpression ( #1305 )
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* Fix issue 7904: Handle double nots in isSameExpression
* Skip checking double nots in assignments
* Use ast to check for double not
2018-07-15 11:30:02 +02:00
42f075c3fa
Skip literals for always true/false ( #1304 )
2018-07-12 23:06:47 +02:00
7e2858f158
astyle formatting
...
[ci skip]
2018-07-10 22:56:18 +02:00
03faa25d12
Conditions: Better handling of function calls
2018-07-08 15:58:04 +02:00
c2f0828a61
#6645 false negative: condition is always false. Add a regression test
2018-07-03 08:25:37 +02:00
ce50df8047
Fix override warnings. ( #1234 )
2018-05-15 16:37:40 +02:00
c520735009
Improve checking of size condition against empty to avoid FPs ( #1213 )
...
* Improve checking of size condition against empty to avoid FPs
* Add const and todo for reverse conditions
2018-05-11 10:22:06 +02:00
e571e598b6
Fix false positive with inner conditions when using pointers ( #1195 )
2018-04-28 18:56:13 +02:00
1b4f4d7130
Fixed #8495 (False positive: boolean result used in bitwise operation when & is overloaded)
2018-04-17 22:14:17 +02:00
bbfcccf078
Refactorization: Replace several push_back-sequences by initializer lists
2018-04-09 09:41:24 +02:00
795b9f5e0f
astyle formatting
2018-04-08 09:25:59 +02:00
b85dda77da
Add a check for identical inner conditions ( #1156 )
2018-04-08 08:13:44 +02:00
0c6f184423
Fix false positive for opposite conditions when using different containers ( #1143 )
...
* Fix false positive for opposite conditions when using different containers
* Add additional test
2018-04-05 06:43:13 +02:00
7e4dba6a7e
Updated copyright year
2018-03-31 20:59:09 +02:00
43be20a824
Check more opposite conditions
2018-03-24 07:58:37 +01:00
c4caee6b18
Updated copyright year
2018-01-14 15:37:52 +01:00
28cfee2d4f
Fixed #8250 (New check: Pointer calculation result cant be NULL unless there is overflow)
2017-10-22 14:32:54 +02:00
5993c40d5b
Improve 'opposite inner condition' check
2017-09-22 14:01:20 +02:00
927b14b60f
Fixed #8217 (Crash in isVariableChanged())
2017-09-14 15:45:15 +02:00
bb20c0504e
CheckCondition: Fix FP in daca (iqtree) 'in >> ch'
2017-09-13 22:46:36 +02:00
9f4fc7b323
Rename sameConditionAfterEarlyExit to identicalConditionAfterEarlyExit
2017-09-10 22:59:39 +02:00
db321c2617
CheckCondition: Fix FP when there is increment/decrement in condition (daca icu)
2017-09-10 22:58:05 +02:00
c34fdd1905
CheckCondition: Fix FP for undeclared variables (daca)
2017-09-10 22:30:41 +02:00
899ad8479d
CheckCondition: Fixed FP when condition contains global static variable
2017-09-08 15:44:56 +02:00
d9adb5432a
astyle formatting
...
[ci skip]
2017-09-08 15:41:14 +02:00
9cbfa0e383
Fix #7803 : false negative: condition is always true 'if (flags & A)' ( #938 )
2017-09-08 14:30:42 +02:00
58db814d72
Rephraze /Same/Identical/
2017-09-08 12:41:33 +02:00
120d0f86d0
CheckCondition: Fix FP about same condition when switch case is used (daca)
2017-09-07 22:05:01 +02:00
f2d56363d3
CheckCondition: Fix TODO assertion
2017-09-06 22:53:36 +02:00
e0c7f7f8f2
CheckCondition: Fix FP when there are method calls in condition
2017-09-06 22:26:00 +02:00
35736364f8
Fixed #8199 (false negative: (warning) Same condition '...', second condition is always false)
2017-09-05 22:45:28 +02:00
e5e6f37e41
Fixed #7405 (false positive: (warning) Opposite conditions in nested 'if' blocks lead to a dead code block.)
2017-09-05 22:03:29 +02:00
c1000998f0
CheckCondition: Fix FP found in daca results (ace)
2017-09-05 09:33:35 +02:00
d82805b7fe
CheckCondition: Improved checking for same conditions
2017-09-04 22:40:34 +02:00
abae5e0156
Fixed #8198 (false positive: (warning) Same condition, second condition is always false)
2017-09-04 22:25:20 +02:00
ad494b996c
TestCondition: break out tests to functions
2017-09-04 22:11:53 +02:00
d838dc2129
CheckCondition::multiCondition2: Fix FN for pointers
2017-09-04 15:58:22 +02:00
9465dca583
CheckCondition: Fix FPs for aliased variables (daca)
2017-09-04 09:34:03 +02:00
ef4a7ba7f2
Fix FP in CheckCondition::multiCondition2
2017-09-03 14:46:37 +02:00
b9849d9e4e
CheckCondition::multiCondition2: Handle loops better
2017-09-03 11:03:01 +02:00
01e65d3e00
Improved CheckCondition::multiCondition2 so deeper bugs are found
2017-09-03 10:44:22 +02:00
f2ec5f24ce
Fixed #5845 (new check: same condition after noreturn conditional code => second condition is always false)
2017-09-03 10:34:34 +02:00
0b751dcc1b
Opposite conditions: Better matching when outer condition uses &&
2017-09-01 23:24:15 +02:00
3b4f60fd21
Updated error message
2017-09-01 13:33:47 +02:00
7fad1b9a36
Improved checking for opposite conditions
2017-08-31 22:53:21 +02:00
dce942197c
Fixed #8186 (Inner condition always false inside for loop)
2017-08-31 16:00:12 +02:00
255d0410a4
Fixed #8085 (Token::expressionString: unsigned long long)
2017-07-21 09:16:42 +02:00
814d2ae2a4
Fixed #7028 (False positive: opposite conditions (const method modifies variable))
2017-07-10 23:12:45 +02:00
28aa939d69
iwyu - include what you use
2017-05-27 04:33:47 +02:00
040d2f0012
Use simplecpp lexer in test cases
2017-05-18 21:52:31 +02:00
55cd69e290
alwaysTrueFalse: Dont warn when checking sizeof for some type. such condition might be platform dependent.
2017-05-13 19:07:24 +02:00
7fd04cd8d0
Updated Token::expressionString(), write '->' instead of '.'
2017-04-30 14:22:18 +02:00
9225bff31d
Added (back) support for enums to CheckCondition::checkIncorrectLogicOperator() ( #7794 )
2017-03-23 18:57:48 +01:00
ca3e3b3cdb
Fixed false positive multiCondition when & is used in both conditions ( #7827 )
2017-03-15 19:37:14 +01:00
263c3596d5
known conditions: dont warn about 0 or 1 conditions as those look intentional
2017-03-08 18:39:19 +01:00
1c6c209353
Fixed #7890 (1.77 false positive from knownConditionTrueFalse with function-like macros)
2017-03-03 19:53:16 +01:00
16c06e5714
Fixed #7588 (Opposite conditions in nested 'if' blocks lead to a dead code block.)
2017-02-28 18:46:28 +01:00
a53f14da25
Fixed #7925 (False Positive identical condition)
2017-02-22 21:13:36 +01:00
57b57428c2
Fix some typos in comments (found by codespell)
...
Signed-off-by: Stefan Weil <sw@weilnetz.de>
2016-11-27 11:40:42 +01:00
cf24ea5221
fix #7783 : false positive knownConditionTrueFalse on assert(0 && "message").
2016-11-23 21:54:38 +01:00
d4f01583b6
Fixed TODO (check if function parameter is non-const reference etc..) by common function
2016-11-01 14:06:30 +01:00
58eb644003
Improved Check: Warn about number and char literals in boolean expressions ( #7750 )
2016-10-09 13:21:00 +02:00
9417425829
Fix testrunner
2016-08-29 04:26:27 +02:00
09a83f2cc8
Fixed #7567 ("(a | 7) > 6U" is always true)
2016-08-07 16:58:39 +02:00
5611a71820
Fixed #7543 (False positive boolean result used in bitwise operation)
2016-07-29 18:46:43 +02:00
89be630156
Fixed #7543 (False positive boolean result used in bitwise operation)
2016-07-29 17:24:22 +02:00
a5cfa2b12c
- #7522 and #7428 revisited. ((a&7)>7U) is always false and ((X|7)>=6) is correct (X can be negative).
2016-06-17 12:12:53 +02:00
f2ae295f1e
Support char literals in CheckCondition::checkIncorrectLogicOperator() ( #5912 )
2016-05-24 15:08:48 +02:00
5d5886b464
Properly detect binary & in CheckCondition::clarifyCondition() (fixes false positives when self-checking cppcheck)
2016-05-06 17:39:41 +02:00
3366a74bb0
Refactorized CheckCondition::clarifyCondition():
...
- Reimplemented parts of the check based on ValueType
- Merged two loops
Fixed some type conversion messages
2016-05-06 15:22:45 +02:00
7e020e1d92
- fix for #7428 false negative: Statement is always false
2016-04-14 14:50:08 +02:00
7bd034c009
Fixed #7369 (False positive knownConditionTrueFalse - assertions)
2016-02-06 14:37:44 +01:00
40e14f401f
CheckCondition::alwaysTrueFalse: Move to normal checking to catch more problems
2016-01-26 10:08:21 +01:00
6faa637fc7
Fixed #6537 (False positive badBitmaskCheck - error in valueflow)
2016-01-24 13:45:44 +01:00
996c9244d8
Update copyright year to 2007-2016.
2016-01-01 15:34:45 +02:00
1b0bb02f1d
invalidTestForOverflow: Fixed some false negatives ( #7184 )
2015-11-30 11:12:51 +01:00
fb8cce647c
invalidTestForOverflow: Refactor; move from checkother to checkcondition
2015-11-30 08:51:15 +01:00
0f9d90d2be
Changed Copyrights. Removed my name.
2015-11-18 20:04:50 +01:00
b9b0964dab
Fixed #7006 (False positive Mismatching assignment and comparison (variable is changed in loop))
2015-11-11 13:45:28 +01:00
2554674f4b
Add regression test for previously fixed #6064 , and TODO test for #6081
2015-11-07 11:17:44 +01:00
ac9cb87e04
ValueType: Handle bit operations, sizeof better. Use ValueType in astIsFloat().
2015-10-11 12:20:40 +02:00
0a34b206e8
Refactorization: Reduced code duplication in test suite
2015-10-08 11:35:51 +02:00
3a5cef8a7e
Refactorization: Improved usage of Settings instances in test suite
2015-10-07 18:40:03 +02:00
f273323cd0
Fixed TODO-test for CheckCondition::checkBadBitmaskCheck by handling functions return bool.
2015-09-03 21:07:03 +02:00
6865724c4e
Fixed #6914 (Token::expressionString: parenthesis missing in expression (*it)->stats.corpse_ticks)
2015-08-12 10:55:25 +02:00
eda5272dfd
Fixed #6875 (Improve 'Redundant condition' error message)
2015-08-05 11:15:54 +02:00
73eefa46fc
testcondition: update testcase that was added since I did the changes.
2015-07-31 15:31:43 +02:00
87891b4128
CheckCondition::checkIncorrectLogicOperator put conditions in single quotes
2015-07-31 15:28:48 +02:00
21ed807f8d
CheckCondition::alwaysTrueFalseError: put condition in single quotes.
2015-07-31 15:28:37 +02:00
251f6d2a15
Fixed #6898 (Token::expressionString: wrong output when first token is post-incremented)
2015-07-31 07:03:52 +02:00
1752c4f4f0
Avoid 'Condition always true/false' FP when part of the condition is an expanded macro
2015-07-30 13:30:16 +02:00
c5673612e2
#6069 False positive incorrectLogicOperator due to dynamic_cast. Run CheckCondition::checkIncorrectLogicOperator on non-simplified tokenlist.
2015-07-30 10:30:30 +02:00
120f3072eb
alwaysTrueFalse: Dont write warning when comparison is made in macro
2015-07-29 12:51:00 +02:00
64b72bd6e5
Fixed #6227 (False positive (oppositeInnerCondition) - if (!dynamic_cast<>))
2015-07-27 10:43:52 +02:00
176b3925b3
Removed "verify" code in testrunner. Fixing its messages reduces the accuracy of the test suite.
2015-07-25 14:18:41 +02:00
f711520892
Fixed #6852 (false negative: logical conjunction 'x == 0')
2015-07-21 22:26:22 +02:00
1b8252181d
Tokenizer: Removed Tokenizer::simplifyIfNotNull ( #6072 )
2015-07-21 17:58:44 +02:00
cb04dfbd37
Fixed #4842 (condition is always true (variable is assigned constant value and then used in condition))
2015-07-17 15:30:23 +02:00
15a8e4d2df
Temporarily revert "Fixed #4842 (condition is always true (variable is assigned constant value and then used in condition))"
...
This reverts commit a3fbad50cb
2015-07-16 21:10:46 +02:00
a3fbad50cb
Fixed #4842 (condition is always true (variable is assigned constant value and then used in condition))
2015-07-16 20:17:57 +02:00
1d910bc3bc
#6313 : Added test case for oppositeInnerCondition.
2015-07-16 08:44:38 +02:00
1a872a2c9f
Fixed #6019 (false negative: Expression is always true/false '!(v!=10) && !(v!=20)')
2015-07-13 20:53:49 +02:00
6e03e7dca2
Remove some code checking for invalid class hierarchy which got obsolete since 480a5672b0. Run astyle
2015-07-01 07:50:13 +02:00
108b035af2
Adjust two checks which have different results on Windows/Visual Studio than on Linux: one succeeds already, another fails. Analysis/fix is under development. Temporary repair allows to detect further regressions.
2015-06-30 21:21:26 +02:00
1d49334398
Fixed #6662 (False positive assignIfError (assignment in while condition))
2015-06-20 16:23:16 +02:00
272cc55ab8
#5309 False positive: redundantCondition - comparing large integer values (unsigned long long). Testcase added, issue got fixed before.
2015-06-20 12:18:24 +02:00
af4a4663e2
Fixed #6764 (False positive redundantCondition - !(i>1) is not i<1)
2015-06-19 19:49:05 +02:00
1e1ba6b4a9
Fixed #6574 (False positive oppositeInnerCondition - unknown variable)
2015-06-14 20:06:05 +02:00
a7b82b5c28
Refactoring to address some issues from #5895 (handling of unsigned numbers). Also adding a TODO testcase since the real issue (FP) is still not fixed
2015-06-13 18:08:13 +02:00
cae605b1ec
New warning: warn about redundant code in condition.
2015-06-10 18:53:55 +02:00
bc5132e0ac
Refactorization: Moved declaration of errout, ... to testsuite.h, uniformized style
2015-03-11 22:54:43 +01:00
b9cc5b5c6b
#6543 crash: CheckCondition::checkBadBitmaskCheck ; wine dlls/gdi32/dibdrv/primitives.c. Run astyle.
2015-02-23 22:06:55 +01:00
bedc935ab0
New check: Warn about constant expression if ( unknown | non_null_constant) ( #6519 )
2015-02-22 13:09:39 +01:00
eec938dbad
Fixed #6249 (False positive: Incorrect detection of (assignment + comparison) inside for-clause)
2015-02-05 20:17:30 +01:00
d6c94e3828
isOppositeCond: Fixed FN
2015-02-01 13:03:38 +01:00
d091639080
Fixed #6482 (False positive multiCondition)
2015-02-01 12:58:06 +01:00
21cb0cfd60
Take simplifyIfNotNull and simplifyIfNot out of simplifyTokenList1 (first step for #6072 )
2015-01-31 20:12:02 +01:00
Paul Fultz II
Daniel Marjamäki
amai2012
IOBYTE
PKEuS
Nekto89
Ayaz Salikhov
Stefan Weil
Matthias Krüger
Frank Zingsheim
Harald Scheidl
Bartlomiej Grzeskowiak
PKEuS
Bartlomiej Grzeskowiak
Lauri Nurmi
Simon Martin
orbitcowboy
Dmitry-Me
PKEuS