73c44c8381
Coverity complains that qCountLeadingZeroBits() may return 64 and then
the RHS will be out-of-range for int. Of course, 64 leading zero bits
means that the argument is 0, which we excluded in the first `if` of
the if-else chain.
I can only guess (because it doesn't tell me which value of `bytes` it
is using for the analysis) that Coverity assumes bytes ==
numeric_limits<qint64>::min() and considers the overflow in qAbs() to
yield a 0, because, it being UB, it may yield anything.
Be that as it may, the fact remains that formattedDataSize() invokes
UB when passed numeric_limits<qint64>::min(), as confirmed by ubsan:
global/qnumeric.h:479:26: runtime error: negation of -9223372036854775808 cannot be represented in type 'long long int'; cast to an unsigned type to negate this value to itself
text/qlocale.cpp:5062:82: runtime error: signed integer overflow: -2147483648 * 3 cannot be represented in type 'int'
text/qlocale.cpp:5062:26: runtime error: division by zero
FAIL! : tst_QLocale::formattedDataSize(English-Decimal-min) Compared values are not the same
Actual (QLocale(language).formattedDataSize(bytes, decimalPlaces, units)): "-inf bytes"
Expected ("output") : "-9.22 EB"
So fix the overflow by using the new QtPrivate::qUnsignedAbs(). Then
sit back and await Coverity's verdict on the next run.
[ChangeLog][QtCore][QLocale] Fix issue when calling
formattedDataSize() with numeric_limits<qint64>::min().
Amends
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| .. | ||
| auto | ||
| baseline | ||
| benchmarks | ||
| global | ||
| libfuzzer | ||
| manual | ||
| shared | ||
| testserver | ||
| CMakeLists.txt | ||
| README | ||
README
This directory contains autotests and benchmarks based on Qt Test. In order
to run the autotests reliably, you need to configure a desktop to match the
test environment that these tests are written for.
Linux X11:
* The user must be logged in to an active desktop; you can't run the
autotests without a valid DISPLAY that allows X11 connections.
* The tests are run against a KDE3 or KDE4 desktop.
* Window manager uses "click to focus", and not "focus follows mouse". Many
tests move the mouse cursor around and expect this to not affect focus
and activation.
* Disable "click to activate", i.e., when a window is opened, the window
manager should automatically activate it (give it input focus) and not
wait for the user to click the window.