Commit Graph

9391 Commits

Author SHA1 Message Date
Daniel Marjamäki 2e1cbbeb14 ExprEngine: Fix output for StructValue 2019-09-26 19:39:30 +02:00
IOBYTE d0968a1377 Warn about unknown macro causing template syntax error (#2222) 2019-09-26 16:01:01 +02:00
Daniel Marjamäki b55c587ab2 astyle formatting
[ci skip]
2019-09-26 10:32:49 +02:00
Paul Fultz II 597d0fa35b Support expression in valueFlowAfterCondition (#2219)
* Add valueFlowForwardExpression function to forward values of an expression

* Use token for expression

* Fix name in bailout message

* Handle expressions

* Add more tests for more expressions

* Add more tests

* Solve the expression if possible

* Formatting
2019-09-26 10:32:25 +02:00
IOBYTE 4475c4c7e2 template simplifier: fix syntax error (#2218) 2019-09-26 10:31:19 +02:00
Daniel Marjamäki c5302d20a3 ExprEngine: ConditionalValues, output symbolic expressions 2019-09-26 10:03:58 +02:00
Rikard Falkeborn 4dbf006dc7 Fix severity of c++14 shifts with too many bits (#2213)
For c++14, shifting a variable with a value larger than or equal to the
number of bits in the variable is undefined. Left-shifting with a value
equal to the number of bits of the variable is implementation defined.

See also trac ticket #9306.
2019-09-25 20:16:04 +02:00
Daniel Marjamäki 9e76630a4b ExprEngine: Restructure handling of arrays to handle dynamic buffers better 2019-09-25 18:33:21 +02:00
Oliver Stöneberg eac040a00b Various clang-tidy fixes (#2192)
* use range loops

* removed redundant string initializations

* use nullptr

* use proper boolean false

* removed unnecessary continue from end of loop

* removed unnecessary c_str() usage

* use emplace_back()

* removed redundant void arguments
2019-09-25 15:25:19 +02:00
Tyson Nottingham ca5f2562fc Fix false negatives in checkIncrementBoolean (#2210)
Detect incrementing boolean expressions involving pointer dereferences,
array element accesses, etc.
2019-09-25 13:07:39 +02:00
Sebastian 0fadae78d3 boost.cfg: Add configuration and tests for boost::bind() (#2206) 2019-09-25 12:49:05 +02:00
IOBYTE 12f93b63a8 template simplifier: fix simplification of "< %num% %comp% %num% >" (#2214)
* template simplifier: fix simplification of "< %num% %comp% %num% >"

* fix test to not fail on 32 bit platforms
2019-09-25 12:06:29 +02:00
Daniel Marjamäki 0011fb5a36 ExprEngine: Temporary hardcoding for calloc 2019-09-24 22:22:16 +02:00
Daniel Marjamäki 0471e74489 ExprEngine: Handle char literals 2019-09-24 20:11:07 +02:00
Daniel Marjamäki 1769af4a6c ExprEngine: Passing variable address to function 2019-09-24 19:53:33 +02:00
Sebastian 5615da4547
std.cfg: Add configuration and tests for std::bind() (#2207)
TODO:
Somehow Cppcheck fails to print an ignoredReturnValue message when the
return value is not used (see ticket 
https://trac.cppcheck.net/ticket/9369 )
2019-09-24 12:16:13 +02:00
Paul Fultz II 0df4876059 Fix issue 9367: FP knownConditionTrueFalse (#2209) 2019-09-24 08:15:03 +02:00
Daniel Marjamäki c1ff3419a6 ExprEngine: Value truncation 2019-09-23 20:28:12 +02:00
Daniel Marjamäki 9025b47f82 ExprEngine: some handling of NULL pointer 2019-09-23 18:10:06 +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
Rikard Falkeborn bb5ac32872 Fix #7031 (improve error message for memory related warnings) (#2204)
Printout both the locations on double free errors, mismatching
alloc/dealloc and dealloc return error.
2019-09-22 21:50:02 +02:00
Daniel Marjamäki 28d13e7567 ExprEngine: Implement basic float handling 2019-09-22 21:14:36 +02:00
Rikard Falkeborn df800e35d4 Fix memleak FP with return with parenthesis (#2202)
* Fix memleak FP with return  with parenthesis

Fix FPs pointed out by daca@home on the following form:

    void* f(void) {
        void* x = malloc(1);
        return(x);
    }

Fix it by only skipping tokens if there is an actual match with a
variable. This allows to remove the special casing of "return;".

* Add testcase with cast
2019-09-22 19:18:31 +02:00
Daniel Marjamäki 6e17853ea9 ExprEngine: Guess function call return value 2019-09-22 16:40:48 +02:00
Daniel Marjamäki 5c07cfd2e8 ExprEngine: Better handling of pointer aliasing 2019-09-22 15:58:55 +02:00
Daniel Marjamäki ec4b7c1f4b ExprEngine: Better handling of pointers 2019-09-22 10:56:57 +02:00
Daniel Marjamäki 7d6fd915be ExprEngine: Better handling of compound assignments 2019-09-21 21:15:51 +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
Daniel Marjamäki da91c139d5 ExprEngine: Passing array to function, array data might be overwritten 2019-09-21 19:34:06 +02:00
Rikard Falkeborn 46ac0d79c1 Checkmemleakautovar: fix crash and FP (#2196)
This fixes crashes found by daca where valueType() is NULL. Also,
somewhat related, it removes warnings when casting to a type that is
unknown to cppcheck, for example, there is no longer a warning for the
following code:

	void* f() {
		void *x = malloc(1);
		return (mytype)x;
	}
2019-09-21 14:59:54 +02:00
Daniel Marjamäki b2cab003ff ExprEngine: Fix output for arrays 2019-09-21 14:17:16 +02:00
Daniel Marjamäki 3d0d3ec4c5 ExprEngine: handling array initialization with string literal 2019-09-21 11:36:34 +02:00
Tyson Nottingham d6a70d27c7 Fix false negatives in checkAssignBoolToFloat and minor related improvements (#2198)
* Fix false negatives in checkAssignBoolToFloat

Detect assignments to expressions involving pointer dereferences, array
element accesses, etc.

* Pass assignment token to assignBoolToFloatError

Pass assignment token rather than boolean token to make error reporting
consistent between checkAssignBoolToFloat and checkAssignBoolToPointer,
as well as with other assignment checks in the code base.

* Make checkAssignBoolToPointer check consistent with checkAssignBoolToFloat
2019-09-21 08:24:54 +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
Oliver Stöneberg b5c598cca4 added missing OVERRIDE usage and removed redundant virtual (#2190) 2019-09-20 21:57:16 +02:00
Oliver Stöneberg 9028b4a81d do not access static methods through instance (#2189) 2019-09-20 21:54:30 +02:00
Daniel Marjamäki 6c59957109 ExprEngine: Better handling of conditions 2019-09-20 21:27:51 +02:00
Rikard Falkeborn 007b5d3e8d Fix #9343 (memleak FP when return with cast) (#2162)
This was most likely introduced when the checks were changed to run on
the full tokenlist instead of the simplified one.

Take care to warn about cases where casts destroy the pointer, such as

	uint8_t f() {
		void* x = malloc(1);
		return (uint8_t)x;
	}
2019-09-20 15:09:27 +02:00
Daniel Marjamäki 049f6475ee astyle formatting
[ci skip]
2019-09-20 15:07:27 +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
IOBYTE 8c5cf8c029 Fixed #9046 syntaxError (#2180)
* Fixed #9046 syntaxError

* fix another syntax error

* fix some more syntax errors
2019-09-20 12:35:01 +02:00
Oliver Stöneberg de9f489b08 use range loops / constness (#2181)
* use range loops / constness

* platform.cpp: avoid shadowed variable
2019-09-19 20:29:33 +02:00
Sebastian bf55e835aa
Windows testrunner: Add testexprengine.cpp (#2184)
Add export of executeAllFunctions() in exprengine.h
2019-09-19 19:40:00 +02:00
versat 7277fe5a2b gnu.cfg: Add support for macro __extension__
The macro does nothing except preventing from warnings when compiling
with "pedantic" or other options.
2019-09-19 12:27:21 +02:00
Sebastian 8207fb7b14
cairo.cfg: Add library configuration/tests/... for cairo library (#2176)
Reference: https://www.cairographics.org/
2019-09-19 08:48:04 +02:00
versat 076c604de8 python.cfg: Improve Python C API configuration
Add configurations for types, macros, alloc/dealloc and functions.
2019-09-18 15:09:13 +02:00
versat d08539fe17 windows.cfg: Fix PostMessage() configuration
First argument is optional (allowed to be NULL). See also the annotation
"_In_opt_".
Reference:
https://docs.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-postmessagea
2019-09-18 09:22:57 +02:00
Sebastian 5bf6bd1f5e
windows.cfg: Enhance/fix Windows configuration (#2177)
Add/fix some missing/incorrect function configurations found by
analyzing TortoiseGit project.
Add some macros.
2019-09-18 08:41:37 +02:00
Daniel Marjamäki 2d651b09fc ExprEngine: Add new experimental path-sensitive data flow analysis. Initially used for 'verification' but could possibly later be used as a complement in the normal analysis. The code is work-in-progress and hacky! 2019-09-17 21:00:59 +02:00
Sebastian fbbaea3cd9
qt.cfg: Add some missing macro definitions (#2175)
Found by daca@home
2019-09-16 15:58:35 +02:00