507c7a4388
Improvement to lifetime tracking of addressof and derefencing
...
This will now warn for cases like this:
```cpp
auto& f() {
std::vector<int> x;
return x[0];
}
```
It also improves the handling of address of operator, so it can now warn across some function calls, like this:
```cpp
int& f(int& a) {
return a;
}
int* hello() {
int x = 0;
return &f(x);
}
```
2019-02-22 06:38:56 +01:00
2908593cf6
checkautovariables: eliminate false positives on assignment of &ptr->item ( #1667 )
...
Even if `ptr` is a local variable, the object `ptr->item` might be not.
So taking address of `ptr->item` is definitely not unsafe in general.
This commit fixes false positives triggered by commit
1.85-249-gf42648fe2 on the following code of sssd:
https://github.com/SSSD/sssd/blob/d409df33/src/sbus/request/sbus_request.c#L359
2019-02-18 09:35:07 +01:00
bd7790fd8c
Update copyright year
2019-02-09 07:24:06 +01:00
165a22ed0f
Lifetime: Support analysis with functions that do not return a reference ( #1632 )
...
* Initial support for function return
* Add test case
* Add support for reference parameters
* Format
2019-01-29 09:47:52 +01:00
d6aaf401df
Lifetime: Follow functions that return references
...
This will now warn for cases like this:
```cpp
int& f(int& a) {
return a;
}
int& hello() {
int x = 0;
return f(x);
}
```
2019-01-26 11:03:57 +01:00
3975913637
Extend lifetime checking for references
...
This will use the lifetime checker for dangling references. It will find these cases for indirectly assigned reference:
```cpp
int &foo()
{
int s = 0;
int& x = s;
return x;
}
```
This will also fix issue 510 as well:
```cpp
int &f( int k )
{
static int &r = k;
return r;
}
```
2019-01-23 07:29:16 +01:00
991191450a
astyle formatting
...
[ci skip]
2019-01-11 12:56:31 +01:00
921f6e4313
Fix issue 8883: False positive: returnDanglingLifetime with local struct or class ( #1585 )
2019-01-11 09:51:02 +01:00
229c45e7f8
Fix issue 8865: FP with dangling lifetime
...
This fixes:
```cpp
void f(uint32_t event, unsigned long op, const xen_ulong_t *args)
{
struct __packed {
uint32_t op;
uint32_t args[6];
} d;
uint32_t *a = d.args;
}
```
2018-12-01 19:07:46 +01:00
f42648fe22
Fixed #8114 (false positive: Address of local auto-variable assigned to a function parameter.)
2018-12-01 10:11:02 +01:00
f16d9d7d90
Issue 6175: Check lifetime of a variables stored in containers and member variables
...
Cppcheck will now warn for all cases here:
```cpp
#include <vector>
class CCluster {};
class MyClass
{ public:
std::vector<CCluster*> m_cluster;
void createCluster()
{
CCluster cl;
CCluster* pcl=&cl;
m_cluster.push_back(pcl);
}
void createCluster2()
{
CCluster cl;
m_cluster.push_back(&cl);
}
CCluster* Cluster()
{
CCluster cl;
CCluster* pcl=&cl;
return pcl;
}
CCluster* Cluster2()
{
CCluster cl;
return &cl;
}
};
```
2018-11-21 08:43:57 +01:00
7ef119cbfc
Fix FPs in lifetime checker
...
This fixes several FPs in the lifetime checker. It also fixes issue [8846](https://trac.cppcheck.net/ticket/8846 ):
```cpp
int * f(int a[])
{
return a;
}
```
2018-11-17 09:41:59 +01:00
54453c5802
Fix FP when copying pointer to string ( #1479 )
2018-11-14 06:59:25 +01:00
f096d7f474
astyle formatting
...
[ci skip]
2018-11-12 10:08:57 +01:00
0e11bb07c8
Extend lifetime analysis to pointer usage ( #1477 )
...
* Use lifetime analysis for pointers as well
* Fix issue 1143: Pointer to local array
* Update message when using pointers
* Avoid infinite loop in tracing lifetimes
2018-11-12 10:08:17 +01:00
68d6b96878
Diagnose invalid lifetimes ( #1475 )
...
* Add check for invalid lifetimes
* Fix FP with member variables
* Dont forward lifetime values in subfunction
* Update message to use out of scope
2018-11-11 16:43:54 +01:00
ee2dfb6604
Fixed #8058 (False positive returnAddressOfAutoVariable within lambda)
2018-11-11 07:52:38 +01:00
d5a478d5c5
astyle formatting
...
[ci skip]
2018-11-10 21:30:01 +01:00
1ffcc6b730
Add initial lifetime checker ( #1448 )
...
* Inital valueflow lifetime checker
* Forward values
* Add initial tests
* Fix deplicate messages
* Fix traversing nested lambdas
* Turn test case into a todo
* Skip if returning a container
* Fix FP when using references
* Add missing header
* Fix FP from broken scopes
* Fix FP with static variable
* Add test for more FPs
* Parse lambda functions
* Check for capture by value
* Add tests for using a container and lambda together
* Fix cppcheck errors
* Add test for nextAfterAstRightmostLeaf
* Add valueflow tests
* Update error message
* Check for correct lambda token
* Improve error path reporting
* Fix hang when parsing arrays that look almlost like lambdas
2018-11-10 16:40:40 +01:00
fb76ef1db1
Fixed testrunner
2018-11-03 18:59:55 +01:00
66ca03fa0c
Fixed #8826 (false negative: Invalid memory address freed)
2018-11-03 18:55:20 +01:00
43233e72b2
Fixed #8691 (False negative for uselessAssignmentArg)
2018-08-17 19:56:36 +02:00
a4fdef8d9e
Refactoring; Use Token::isUnaryOp() to clarify code
2018-07-13 23:02:52 +02:00
d0819e4792
Reuse isVariableChanged() in auto variables
2018-06-24 08:55:23 +02:00
cde63c7573
Use Variable::valueType instead of Variable::typeStartToken in auto variables
2018-06-24 08:25:19 +02:00
79ffe1d4fc
Rename _tokenizer, _settings, _errorLogger
2018-06-16 16:10:28 +02:00
f336c2efe7
Refactoring; Renamed Scope::classStart and Scope::classEnd
2018-04-27 22:36:30 +02:00
2073bd02d8
Refactoring: Use range for loop
2018-04-20 22:13:05 +02:00
a0906140a6
Suppressions: New extensible Suppressions xml format that allow more attributes. To start with it also allows symbolName.
2018-04-09 06:43:48 +02:00
c110770481
Fixed #8325 (False negative: address of auto variable being returned when assigned to another variable first)
2018-01-27 14:48:45 +01:00
cb297a00fc
Auto variables: Assign address of local variable to global pointer ( #6825 )
2018-01-25 22:50:41 +01:00
599e038282
AutoVariables: Warn when address of local array is assigned to global pointer and pointer is not reassigned
2018-01-24 21:33:58 +01:00
c4caee6b18
Updated copyright year
2018-01-14 15:37:52 +01:00
817f66d74d
Fixed crash on garbage code ( #8317 )
2018-01-07 12:52:28 +01:00
64eccd780c
Don't use static where not needed ( #952 )
2017-09-07 13:01:07 +02:00
59034e17f1
Refactoring, reuse code to skip lambda functions
2017-08-29 22:35:55 +02:00
3cd2f2d092
Don't cast bool to bool
2017-06-01 01:49:40 +03:00
28aa939d69
iwyu - include what you use
2017-05-27 04:33:47 +02:00
b1f4bd7504
Refactorization: Reimplemented Settings::_enabled as a bitfeld instead of std::set ( #7995 )
2017-04-11 11:49:26 +02:00
3c8f5b85ae
Refactorization: Allocate Token::_values (ValueFlow information) dynamically, reducing size of each token by around 10%
2017-03-27 18:48:34 +02:00
f68fa72095
Fixed #7583 (Defect: False positive '(error) Reference to temporary returned')
2017-02-26 13:41:49 +01:00
ea53bd22b7
Fixed false positive returnTempReference with operator++ ( #7874 )
2016-12-22 11:49:59 +01:00
aaf19c1e4f
Fixed #7839 (Prefix increment triggers parameter modification warning)
2016-12-19 15:25:36 +01:00
4388435ce1
Revert "checkautovariable: fix #7818 , crash when accessing nullpointer tok2->next()."
...
This reverts commit a5d32aa7a5
2016-11-20 17:21:56 +01:00
a5d32aa7a5
checkautovariable: fix #7818 , crash when accessing nullpointer tok2->next().
...
Not test case added yet because I failed to add it as .h files to testgarbage.
2016-11-16 14:46:37 +01:00
4732667488
ValueFlow: allow more value types
2016-11-13 22:33:39 +01:00
1715969f6f
Support prefix-increment/decrement in CheckAutoVariables::assignFunctionArg() ( #3177 )
2016-10-10 21:34:40 +02:00
d492500f34
#5844 False positive: returnReference fp for inner lambda function
2016-05-20 23:46:56 +02:00
d3645d874e
Mapped toomanyconfigs ,AssignmentAddressToInteger
...
,AssignmentIntegerToAddress ,CastIntegerToAddressAtReturn
,CastAddressToIntegerAtReturn ,assertWithSideEffect ,assignmentInAssert
,uselessAssignmentArg ,uselessAssignmentPtrArg
,comparisonOfFuncReturningBoolError
,comparisonOfTwoFuncsReturningBoolError ,comparisonOfBoolWithBoolError
,incrementboolean ,comparisonOfBoolWithInt ,compareBoolExpressionWithInt
,negativeIndex ,pointerOutOfBounds ,arrayIndexThenCheck
,possibleBufferAccessOutOfBounds ,argumentSize
,arrayIndexOutOfBoundsCond ,noConstructor ,copyCtorPointerCopying
,noCopyConstructor ,uninitMemberVar ,operatorEqVarError
,unusedPrivateFunction ,memsetClassFloat ,mallocOnClassWarning
,operatorEq ,thisSubtraction ,operatorEqRetRefThis ,operatorEqToSelf
,useInitializationList ,duplInheritedMember ,assignIfError
,comparisonError ,multiCondition ,mismatchingBitAnd
,oppositeInnerCondition ,incorrectLogicOperator ,redundantCondition
,moduloAlwaysTrueFalse to their CWEs ids.
2016-02-26 23:53:52 +00:00
23ad881c64
Fixed false positive returnLocalVariable ( #7180 )
2016-01-30 20:18:12 +01:00
Paul Fultz II
Kamil Dudka
Daniel Marjamäki
versat
PKEuS
Ayaz Salikhov
Ayaz Salikhov
Matthias Krüger
Alexander Mai
Roberto Martelloni
PKEuS