RFR: 8346888: [ubsan] block.cpp:1617:30: runtime error: 9.97582e+36 is outside the range of representable values of type 'int'

[Matthias Baesken]

On Mon, 10 Mar 2025 13:37:23 GMT, Matthias Baesken <mbaesken at openjdk.org> wrote:

> When running jtreg tests on macOS aarch64 with ubsan - enabled binaries, in the test
> java/foreign/TestHandshake
> this error/warning is reported :
>  
> jdk/src/hotspot/share/opto/block.cpp:1617:30: runtime error: 9.97582e+36 is outside the range of representable values of type 'int'
> UndefinedBehaviorSanitizer:DEADLYSIGNAL
> UndefinedBehaviorSanitizer: nested bug in the same thread, aborting.
>  
> Seems it happens in this calculation (float value does not fit into an int) : int to_pct = (int) ((100 * freq) / target->_freq);

I created https://bugs.openjdk.org/browse/JDK-8353041   Adjust block frequency calculation    for the follow up.

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PR Comment: https://git.openjdk.org/jdk/pull/23962#issuecomment-2757243222