RFR: 8252407: Build failure with gcc-8+ and asan.

Mon Oct 12 12:00:10 UTC 2020

On Mon, 12 Oct 2020 11:36:17 GMT, eric.1iu <github.com+10482586+erik1iu at openjdk.org> wrote:

> Summary: Fix stringop-truncation warnings casused by gcc.
> 
> The newer gcc(gcc-8 or higher) would warn for calls to bounded string
> manipulation functions such as 'strncpy' that may either truncate the
> copied string or leave the destination unchanged.
> 
> The reason is that -fsanitize=address might simply incompatible with
> -Wstringop-truncation. This patch disables stringop-truncation warning
> when asan enabled, also disables the defining of _FORTIFY_SOURCE in
> fastdebug builds for some potential risks.

Previous discussion https://mail.openjdk.java.net/pipermail/hotspot-dev/2020-September/042810.html

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PR: https://git.openjdk.java.net/jdk/pull/607