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
715714f4de
Forward lifetimes in "for" loops ( #1682 )
...
* Forward lifetimes in for loops
* Format
2019-02-22 06:37:02 +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
c176775afb
Avoid infinite recursion in getLifetimeVariable ( #1634 )
...
* Fix direct recursion
* Limit depth of getLifetimeVariable
2019-01-31 10:34:41 +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
8dd641b8be
Use OVERRIDE in test
2019-01-12 15:45:25 +01:00
921f6e4313
Fix issue 8883: False positive: returnDanglingLifetime with local struct or class ( #1585 )
2019-01-11 09:51:02 +01:00
0a1b3a9d6f
Fix typos ( #1568 )
2019-01-06 17:15:57 +01:00
e4677ae640
Fix issue 8910: Regression: ValueFlow: wrong conditional tokvalue
...
This fixes issue in:
```cpp
void f()
{
char stack[512];
RGNDATA *data;
if (data_size > sizeof (stack))
data = malloc (data_size);
else
data = (RGNDATA *)stack;
if ((char *)data != stack)
free (data); // <- data is not stack
}
```
It seems the `ProgramMemory` can't handle two known values(such as int and tok) together. So instead `ValueFlowAfterAssign` runs `ValueFlowForward` with tok values and then runs it with the other values.
2018-12-29 09:31:21 +01:00
45dcfad9f9
Fix issue 8899: False positive returnDanglingLifetime when returning by value
...
This fixes the FP from:
```cpp
#include <string>
class MyString
{
public:
MyString(char* source)
{
length = strlen( source );
buffer = new char[length+1];
if( buffer )
{
strcpy( buffer, source );
}
}
char* buffer;
int length;
};
MyString Foo()
{
char arr[20];
sprintf(arr, "hello world");
return arr;
}
void main()
{
MyString str = Foo();
printf(str.buffer);
}
```
2018-12-15 17:58:45 +01:00
3e1b34dd8f
Fix FPs and crashes with byDerefCopy ( #1503 )
...
* Fix FP when inserting a range into a container
* Formatting
* Fix crash
2018-12-02 14:31:31 +01:00
ccbaad32f9
Fix merge conflicts
2018-12-01 19:14:43 +01:00
b841b818d2
Fix 8872: Crash in LifetimeStore when there is no scope for variable
...
This fixes crash in:
```cpp
struct edit_line_paste_over {
void operator()(agi::Context *c) override {
paste_lines(c, true, [&](AssDialogue *new_line) -> AssDialogue * {
AssDialogue *ret = paste_over(c->parent, pasteOverOptions, new_line, static_cast<AssDialogue*>(&*pos));
return ret;
});
}
};
```
2018-12-01 19:11:26 +01:00
67dd822910
Fix FP in lifetime anlaysis: Dont decay std array
...
This will fix FP with:
```cpp
std::array<char, 1> f() {
std::array<char, 1> x;
return x;
}
```
2018-12-01 19:09:19 +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
d376e9f245
Track variable lifetime through function calls ( #1481 )
2018-11-16 06:12:28 +01:00
54453c5802
Fix FP when copying pointer to string ( #1479 )
2018-11-14 06:59:25 +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
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
66ca03fa0c
Fixed #8826 (false negative: Invalid memory address freed)
2018-11-03 18:55:20 +01:00
fa40b821e6
Fix issue 8740: Add a pass to check for valid operators ( #1372 )
2018-09-08 21:10:34 +02:00
43233e72b2
Fixed #8691 (False negative for uselessAssignmentArg)
2018-08-17 19:56:36 +02:00
cde63c7573
Use Variable::valueType instead of Variable::typeStartToken in auto variables
2018-06-24 08:25:19 +02:00
ce50df8047
Fix override warnings. ( #1234 )
2018-05-15 16:37:40 +02:00
7e4dba6a7e
Updated copyright year
2018-03-31 20:59:09 +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
28aa939d69
iwyu - include what you use
2017-05-27 04:33:47 +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
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
23ad881c64
Fixed false positive returnLocalVariable ( #7180 )
2016-01-30 20:18:12 +01:00
996c9244d8
Update copyright year to 2007-2016.
2016-01-01 15:34:45 +02:00
ba0859e838
#6981 crash in checkvaarg.cpp (with possible fix). Avoid segfault. Add SymbolDatabase::validate() to allow validating smyboldatabase
2015-12-05 20:55:26 +01:00
0f9d90d2be
Changed Copyrights. Removed my name.
2015-11-18 20:04:50 +01:00
71bf0f076f
CheckAutoVariables: Handle 'x-y' better in isAutoVarArray
2015-11-15 19:34:36 +01:00
4e578af603
CheckAutoVar: Improved usage of AST and ValueFlow
2015-11-15 14:48:13 +01:00
c10a10c26f
CheckAutoVariables: use ValueFlow to detect more errors when pointer aliases are used
2015-11-15 12:10:35 +01:00
Paul Fultz II
Kamil Dudka
Daniel Marjamäki
practicalswift
IOBYTE
Ayaz Salikhov
PKEuS
Alexander Mai
PKEuS
Lauri Nurmi