774464eabb
Fix issue 8996: False positive duplicateCondition
...
This fixes issue 8996 by improving the alias checking by using lifetime analysis. It also extends the lifetime checker to handle constructors and initializer lists for containers and arrays.
2019-03-19 06:25:10 +01:00
92485245ce
Restore severity for 'autoVariables'
2019-03-15 15:13:11 +01:00
3656f1ae4f
Auto variables: Fix false negatives for normal tokens
2019-03-14 13:51:35 +01:00
6eeee743d2
Auto variables: Minor cleanup
2019-03-14 06:41:11 +01:00
7859d7d879
#3030 add another regression test
2019-02-22 21:10:05 +01:00
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
a8cf63239a
Fixed false positive autovarInvalidDeallocation if deallocting result of member function ( #6551 )
2015-11-11 16:59:31 +01:00
f1bbcfe32d
Refactorization: Avoid loading std.cfg multiple times in testautovariables.cpp
2015-10-07 14:40:09 +02:00
59abb04042
Ticket #6596 : Address of local variables can also be assigned to pointer-pointer arguments using the ptr[] syntax.
2015-08-28 20:29:51 +02:00
7bb79562e9
Skip inner classes in CheckAutoVariables::returnReference() ( #6951 )
2015-08-26 13:31:51 +02:00
6fb19b02d0
Properly differentiate arrays of pointers and pointers to arrays.
2015-08-25 21:19:19 +02:00
a297a03b64
Fixed false positive #6787 : Skip over lambdas in CheckAutoVariables::returnReference()
2015-08-14 13:03:07 +02:00
9627fccdc5
assignFunctionArg: don't warn when there is self assignment. There is a separate warning for self assignments.
2015-08-09 14:51:23 +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
7481fbb028
Fixed #6506 (Properly detect calls to the deallocating free() function)
2015-06-20 21:00:54 +02:00
42673255ed
Refactorized testrunner: Create std::string only where necessary
2015-03-15 12:36:40 +01:00
bc5132e0ac
Refactorization: Moved declaration of errout, ... to testsuite.h, uniformized style
2015-03-11 22:54:43 +01:00
130ffc5752
Fixed #6538 (Symboldatabase: improve isFunction)
2015-02-24 06:11:31 +01:00
36841cfa41
Better support for stream operator in CheckAutoVariables::returnReference() ( #6423 )
2015-01-31 10:12:49 +01:00
ff11ba9847
Updated copyright year to 2015
2015-01-03 12:14:58 +01:00
051d42ae6b
astyle formatting
2014-11-20 14:20:09 +01:00
f5d804f71a
running astyle
2014-11-20 10:13:03 +01:00
a3efa1e180
Fixed #4776 (FP: Assignment of function parameter has no effect outside the function, with goto)
2014-10-21 16:21:33 +02:00
1e298a31cf
Refactoring tests. Use utility function to warn about unsimplified code in tests.
2014-09-13 12:59:32 +02:00
ac59485e7e
Refactorized CheckAutoVariables::assignFunctionArg():
...
- Splitted message into style message (assigning non-pointers) and warning message (assigning pointers)
- Support operator++/-- (#4793 )
2014-08-04 11:45:24 +02:00
a04036337d
Fixed #5860 : Don't show returnTempReference for calculations on unknown types
2014-05-24 12:50:04 +02:00
6635abbe55
Improved check: Complain about returning reference to literals or reference to calculation result ( #4317 )
2014-05-22 11:39:11 +02:00
f2e5da290b
Replace 2 invalid test cases added while fixing #5793 by a valid one
2014-05-15 21:20:16 +02:00
146bf11aa7
#5793 - False positive: Deallocation of an auto-variable (at reference notation)
2014-05-12 19:53:49 +02:00
d2ebd718a9
#5691 False positive: autovarInvalidDeallocation - function name 'delete' in C code
2014-05-01 07:32:37 +02:00
ea23a0467b
Fixed false positive #5732 : autovarInvalidDeallocation on pointer to array
2014-04-27 12:18:33 +02:00
6a08c27183
Fix segfault in variableIsUsedInScope() - loop variable not check against NULL
2014-03-22 11:14:11 +01:00
3f30753122
Fixed #5537 (crash: clang ./lib/Basic/FileManager.cpp , since 354e84e7c8 , /lib/symboldatabase.h:288)
2014-03-09 08:17:24 +01:00
354e84e7c8
Fixed #2298 (new check: passing stack-address to free())
2014-03-06 06:32:30 +01:00
4dee3da1bd
Merge pull request #245 from simartin/ticket_5478
...
Ticket #5478 : Only functions and equal operators might return a temporary
2014-03-02 14:53:25 +01:00
875a3f47e7
Ticket #5478 : Only functions and equal operators might return a temporary.
2014-03-02 09:39:10 +01:00
ef3f135af2
Ticket #5050 : Added test case since it works now.
2014-03-01 10:37:55 +01:00
fd3a8a2a18
Update copyright
2014-02-15 07:45:39 +01:00
4f0121ee2f
Splitted simplification out of tokenize()
2013-12-30 17:45:28 +01:00
0ef1529ba5
Fixed #5005 (false positive: (warning) Assignment of function parameter has no effect outside the function.)
2013-10-06 16:07:27 +02:00
1234ec95f0
Fixed #4998 (False positive: Address of local auto-variable assigned to a function parameter)
2013-10-06 14:23:26 +02:00
c2a8f6f59a
astyle formatting
2013-09-28 09:32:41 +02:00
d67a0add47
Ticket #5024 : Don't crash upon invalid code when checking auto variables.
2013-09-28 00:14:12 +02:00
a9a5dc0354
Updated to AStyle 2.03, require this version
2013-08-07 16:27:37 +02:00
cd5e32446f
Fixed #4641 (False positive: Address of local auto-variable assigned to a function parameter)
2013-06-13 16:19:19 +02:00
4e65800adf
TestRunner: Updated warning message when there is unsimplified code
2013-04-16 16:54:19 +02:00
25582dbde7
Simplify TestAutoVariables test cases
2013-04-13 18:38:15 +02:00
54d398c7dd
unittests: removed not needed '\n' at the end of testcases.
2013-03-19 09:18:58 +01:00
33cf561d85
Refactorized check for assigning function parameters:
...
- Fixed false negative: Check is also valid for all non-references, not only for pointers.
- Fixed false negative: Usage before assignment doesn't require bailout
- Fixed false positive #4598 caused by inadequate usage of CheckUninitVar::isVariableUsage
- Made several member functions static
2013-02-18 08:52:49 -08:00
75e20a996d
assign function pointer: Fixed false positive when pointer is used also. Ticket: #2930
2013-02-02 15:26:14 +01:00
6bb8dd605a
assign function parameters: only show warning when --enable=warning or --enable=style is used. Ticket: #2930
2013-02-02 15:08:43 +01:00
cbbb582fc9
Fixed #2930 (new check: redundant assignment of pointer function parameter)
2013-02-01 19:16:17 +01:00
5d5f7085bf
Updating year 2012 -> 2013 to .cpp and .h files and man page.
2013-01-01 18:29:08 +02:00
0d4b87c71e
SymbolDatabase: Improved find function functionality. Taking arguments into account
2012-10-14 17:30:37 +02:00
3c14e4b52a
test: tabs to spaces, remove trailing spaces and extra empty lines at the end of files
2012-09-17 13:51:40 +02:00
1e5d082251
Moved remaining part of c_str() checking to checkstl.cpp. Fixed false positive #4157 .
2012-09-10 15:20:38 +02:00
4fb464982c
Fixed crash reported in #4076
2012-08-22 10:17:23 -07:00
e05a597066
Fixed false negatives in checkautovariables.cpp:
...
- Detect returning temporary instances (#4076 )
- Added support for returning user defined types
2012-08-22 04:08:32 -07:00
17c27f51ff
Fixed #3791 (False positive: returnTempReference)
2012-07-18 07:22:29 +02:00
247d820027
Fixed #3972 : Don't issue auto variable error when the address is assigned to a reference to a non-pointer.
2012-07-13 05:21:45 -07:00
0f1cb4c98c
Message refactorization: checkassignif.cpp, checkautovariables.cpp
2012-07-07 11:31:18 -07:00
ec00824fd3
Fixed #3357 :
...
- Print "inconclusive" tag in cli
- Fixed inconclusive handling in checkbufferoverrun.cpp
- Merged reportInconclusiveError into reportError by adding an additional parameter "bool inconclusive" which is false per default
2012-05-06 10:37:41 -07:00
746beb98bf
Added support for delete and delete[] in invalidDeallocation check ( fixes #1773 )
2012-04-26 16:44:33 +02:00
abcbe2e49f
Fixed #3594 (false positive: returning reference to auto variable)
2012-03-28 18:21:06 +02:00
1ef99e2f21
Improved checkautovariables:
...
- Added support for checking a few more code patterns
- Simplified code by using more information from the symboldatabase
- Moved redundant part of c_str-check to checkstl
Two fixes according to output of pvs studio in testsimplifytokens.cpp
2012-03-01 18:38:20 +01:00
c273d6d31d
Refactorized checkautovariables.cpp. Removed indendation counters.
...
Fixed #3478
2012-01-08 15:32:22 +01:00
8cae17fda8
Update year to 2012
2012-01-01 01:05:37 +02:00
6a0c463ebd
#3382 (Clarify error message 'invalid deallocation')
2011-12-30 10:32:55 +01:00
096b22c46e
#3434 (False positive Returning reference to auto variable)
2011-12-26 07:44:16 +01:00
9b685ba3c3
Code cleanup
2011-12-09 21:00:57 +01:00
1bef8d1247
Tokenizer: Code cleanups
2011-12-08 17:42:26 +01:00
6f8e42a5af
changed the astyle formatting flags
2011-10-13 20:53:06 +02:00
e19cbf0cdd
fix false positive introduced by previous false negative fix commit
2011-09-02 10:39:04 -04:00
833865e736
fix #3066 (False positive: Inconclusive: Assigning address of local auto-variable to a function parameter.)
2011-09-01 22:22:33 -04:00
5bad978833
fix line number in messagex for CheckAutoVariables::autoVariables
2011-09-01 20:34:31 -04:00
2667e34a07
fix again #3064 (false negative: returning address of stack variable)
2011-09-01 18:30:49 -04:00
e7dc765ece
fix #3064 (false negative: returning address of stack variable)
2011-08-31 21:36:31 -04:00
21c9b6d262
add another test for #3030 (Improve check: Returning pointer to local array variable with '&' pointer operator)
2011-08-20 16:41:12 -04:00
7eb43bc107
partial fix for #3030 (Improve check: Returning pointer to local array variable with '&' pointer operator)
2011-08-20 15:08:30 -04:00
9a24492a00
Fixed #2975 (False positive: Return of the address of an auto-variable)
2011-08-10 18:16:31 +02:00
2b8b0c44b2
Fixed #2969 (False positive: assign address of auto-var to function parameter, when function parameter is reassigned later)
2011-08-09 18:24:39 +02:00
2b48c7624c
Auto Variables: Reverted fix for #1514 because my idea was wrong. See ticket: #2944
2011-07-27 10:43:44 +02:00
527c1aae33
fix #2931 (another false negative in auto variables checking when function parameter is a struct)
2011-07-22 08:31:31 -04:00
84ca1902a5
fix #1514 (Improve CheckAutoVariables: assign autovariable address to effective parameter)
2011-07-21 22:37:36 -04:00
4e64d35462
fix #2926 (false negative in auto variables checking when function parameter is a struct)
2011-07-21 22:26:42 -04:00
cc1ecccd01
fix #2928 (False positive (static variable misinterpreted as auto variable))
2011-07-21 18:20:19 -04:00
32f94a47cc
fix #2925 (False negative: auto variables - assigning address of array to function parameter)
2011-07-20 19:02:54 -04:00
bb5dfa58a1
fix #2765 (Non local address detected as address of local auto-variable)
2011-05-06 19:26:04 -04:00
ccb831d375
fix regression #1819 (False positive: auto variable assignment (unseen typedef))
2011-05-06 18:18:48 -04:00
29c73e0571
fix false positive introduced in CheckAutoVariables::autoVariables conversion to use symbol database
2011-04-26 20:16:09 -04:00
55898c0dfc
convert last check in checkautovariables to use the symbol database
2011-04-23 09:50:56 -04:00
cd64d8476c
fixed #2614 (missing varid on function parameter)
2011-04-23 09:37:50 -04:00
2b08744b97
Fixed #2676 (setVarId: variables with global scope qualification :: don't get varids)
2011-04-18 06:56:39 +02:00
c9b2ab3c26
add debug message for function argument missing varid
2011-03-02 21:08:27 -05:00
7507f64ee7
Fixed #2558 (false positive: (error) Returning reference to auto variable)
2011-02-12 15:39:26 +01:00
1e0d538273
checkautovariables: refactor to use the symbol database
2011-02-07 19:26:34 -05:00
226b605774
Change year 2010 -> 2011 in license texts.
2011-01-09 21:33:36 +02:00
8369d0ddd6
Improving 'Wrong assignment of auto variable' error message.
...
Improving the error message as discussed at dev-forum:
https://sourceforge.net/apps/phpbb/cppcheck/viewtopic.php?f=3&t=192&start=0
2010-12-04 09:55:20 +02:00
f12c0c7ada
Tokenizer: add assert(_settings) to Tokenizer to insure the tokenizer always has settings. Ticket: #2219
2010-12-01 18:00:55 +01:00
3d195f2326
Auto variables: improved the check for 'return retval.c_str()'. Ticket: #2191
2010-11-13 15:38:21 +01:00
cd94fa89e0
Tokenizer: More specific bail outs in simplifyKnownVariables
2010-11-07 11:07:56 +01:00
Paul Fultz II
Daniel Marjamäki
amai2012
Kamil Dudka
practicalswift
IOBYTE
Ayaz Salikhov
PKEuS
PKEuS
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