Commit Graph

76 Commits

Author SHA1 Message Date
Daniel Marjamäki b3b7ecc7ea Removed integerOverflowOptimization checking and merged functionality into invalidTestForOverflow 2021-01-05 11:38:19 +01:00
Daniel Marjamäki 52491f1c53 Signed integer optimisations; Also warn about 'x+y<x' 2021-01-03 22:12:19 +01:00
Daniel Marjamäki 6375fb4f08 New check: Warn about nonportable code that can be optimised (signed integer overflow) 2021-01-03 21:03:07 +01:00
Rikard Falkeborn 7973fd843c Refactor: Simplify checkSignConversion
The loop only checks astoperand1 and astoperand2. Simplify the condition
to loop over these instead of using a stack. Also, add a testcase for
when astoperand2 is negative.
2020-07-20 11:16:56 +02:00
Daniel Marjamäki 08ddd84780 Update copyright year 2020-05-10 11:16:32 +02:00
Daniel Marjamäki 3e0218299b Revert "Update copyright year"
This reverts commit 6eec6c4bd5.
2020-05-10 11:13:05 +02:00
Daniel Marjamäki 6eec6c4bd5 Update copyright year 2020-05-10 11:11:34 +02:00
Rikard Falkeborn f6e7fb4bd9
Bugfix valuetype for some integer constants (#2545) 2020-02-19 07:51:39 +01:00
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
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
Paul Fultz II e8435b9ecb Fix issue 9306: Adjust shiftTooManyBitsSigned for C++14 (#2127) 2019-08-31 07:40:57 +02:00
Paul Fultz II aaeec462e6 Re-enable valueFlowSubFunction (#2063)
* Re-enable valueFlowSubFunction

* Formatting

* Skip ternary operators in subfunctions

* Fix test with iostreams

* Fix FP with multiple parameters
2019-08-05 16:26:32 +02:00
Daniel Marjamäki 20278d9c92 Clarify signConversion warning message 2019-08-05 12:41:08 +02:00
Daniel Marjamäki 7c0b011c05 Fixed #9230 (Improve check: integer conversion overflow in return) 2019-07-24 16:17:52 +02:00
Daniel Marjamäki 421a8da6a8 Try to clarify signConversion message 2019-07-17 22:41:24 +02:00
Scott Furry a195477470 Correct Zero/Null as pointer constant (#1938)
Building with enhanced clang warnings indicated a large number of
instances with the warning:

`warning: zero as null pointer constant`

Recommended practice in C++11 is to use `nullptr` as value for
a NULL or empty pointer value. All instances where this warning
was encountered were corrected in this commit.

Where warning was encountered in dependency code (i.e. external library)
no chnages were made. Patching will be offered upstream.
2019-06-30 21:39:22 +02:00
Rikard Falkeborn 68869438be Refactoring: Use range based for loops (#1817) 2019-05-02 06:53:07 +02:00
Rikard Falkeborn 1cc5f3abe7 Set wchar_t type (#1807)
This is necessary for valueflow to know the size, for example when
calculating sizeof(wchar_t).
2019-05-01 16:34:28 +02:00
Daniel Marjamäki bd7790fd8c Update copyright year 2019-02-09 07:24:06 +01:00
Daniel Marjamäki 8dd641b8be Use OVERRIDE in test 2019-01-12 15:45:25 +01:00
Daniel Marjamäki b79619832e Clarify warning 2018-12-23 12:42:18 +01:00
Daniel Marjamäki bc34f0239d Disable the subfunction value flow analysis. It does not work well and needs to be rewritten. There are false positives. 2018-12-18 14:36:49 +01:00
orbitcowboy 2f032d8fa7
Improved const correctness of local variables. (#1396)
* Improved const correctness of local variables.

* Running astyle [ci-skip].

* Removed duplicate 'const'-keyword.
2018-09-24 15:08:16 +02:00
Daniel Marjamäki b9c1308a81 Fixed #8575 (false positive: longCastAssign) 2018-06-04 22:51:21 +02:00
IOBYTE ce50df8047 Fix override warnings. (#1234) 2018-05-15 16:37:40 +02:00
Daniel Marjamäki 7e4dba6a7e Updated copyright year 2018-03-31 20:59:09 +02:00
orbitcowboy a4ab30cbe3 Replace uint8_t with short to fix CI. 2018-02-20 00:22:14 +01:00
orbitcowboy 46b4a502df Added missing include. 2018-02-20 00:18:20 +01:00
orbitcowboy b7b376d901 checkTypes: Take into account type promotion to integer. 2018-02-19 23:55:38 +01:00
orbitcowboy b1b3164259 checktype: Added handling of 'short'-type and added test cases. 2018-02-18 21:09:19 +01:00
orbitcowboy 50844aa7fc checkType: Take into account the size of char. 2018-02-18 14:28:48 +01:00
Daniel Marjamäki c4caee6b18 Updated copyright year 2018-01-14 15:37:52 +01:00
Daniel Marjamäki 840c7eb258 checkFloatToIntegerOverflow: check all calculations, not only in function bodies 2017-09-19 19:30:24 +02:00
Daniel Marjamäki 9268c2034a checkSignConversion: check all calculations, not only in function bodies 2017-09-19 19:25:33 +02:00
Daniel Marjamäki f6e30eee19 checkIntegerOverflow: handle long and long long also 2017-09-19 19:14:29 +02:00
Daniel Marjamäki cac7146cac checkIntegerOverflow: check all calculations, not only in function bodies 2017-09-19 14:43:48 +02:00
Daniel Marjamäki 6bc0df2908 checkTooBigBitwiseShift: Separate id for signed shift overflow 2017-09-19 09:21:20 +02:00
Daniel Marjamäki be0ad20a04 checkTooBigBitwiseShift: bitshift overflow when lhs is signed 2017-09-19 09:08:44 +02:00
Daniel Marjamäki 71b0370389 Fixed #1793 (CheckType::checkFloatToIntegerOverflow: assignments) 2017-08-23 05:34:47 +02:00
orbitcowboy 61e47208eb Removed hard coded avr8 platform and moved it into a platform file (avr8.xml). 2017-08-09 11:58:27 +02:00
Ayaz Salikhov 28aa939d69 iwyu - include what you use 2017-05-27 04:33:47 +02:00
orbitcowboy ffe6582e6b Added platform support for Atmel AVR 8 bit microcontrollers. 2017-05-22 14:46:19 +02:00
Daniel Marjamäki 8ef9ab26b1 Clarify floatConversionOverflow 2017-05-22 11:04:24 +02:00
Daniel Marjamäki 0cb1c4f221 Clarify integerOverflow messages 2017-05-22 10:10:56 +02:00
Matthias Krüger 494f64cb88 tests: fix some self-check findings about functions that can be static.
Was:
[test/testtype.cpp:223]: (performance, inconclusive) Technically the member function 'TestType::removeFloat' can be static.
[test/testsymboldatabase.cpp:61]: (performance, inconclusive) Technically the member function 'TestSymbolDatabase::getSymbolDB_inner' can be static.
[test/teststl.cpp:1437]: (performance, inconclusive) Technically the member function 'TestStl::getArraylength' can be static.
2017-04-09 17:28:00 +02:00
Daniel Marjamäki 28af5c0379 Integer Overflow: Don't warn about left-shift expressions with negative result like '1<<31'. That is common practice. 2016-12-21 18:19:59 +01:00
Daniel Marjamäki 87abe1174f floatConversionOverflow: Avoid warnings when 255.5 is converted to unsigned char etc. 2016-12-10 23:14:40 +01:00
PKEuS d665641a76 Refactorizations:
- use std::string::pop_back() and std::string::back()
- pass argument as const std::string&
- Moved iterator into for loop head
2016-12-05 14:50:01 +01:00
Stefan Weil 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
Daniel Marjamäki 0b3751520b Add a check for float conversion overflows 2016-11-22 22:37:13 +01:00