HotSpot segfaults if given -XX options with an empty string argument (regression)

Chuck Rasbold Chuck.Rasbold at Sun.COM
Thu Sep 4 08:36:20 PDT 2008

Volker -

I've opened bug 6744783 for this.

-- Chuck

On 09/04/08 07:03, Volker Simonis wrote:
> Hi,
> I just realized that there's a regression in the argument parsing code
> of the HotSpot which leads to a segmentation fault if an -XX option
> with an empty string argument (e.g. -XX:SyncKnobs= or
> -XX:SyncKnobs="") is given on the command line.
> The regression must have appeared somewhere in HS 11, because Java
> 1.6.0_06 (which contains HS 10.0_b22) doesn't show the problem while
> both Java 1.6.0_10 (HS 11.0_b11) and Java 1.7.0-ea-b24 (HS 12.0_b01)
> as well as the latest OpenJDK snapshot (Rev. 292 with tag jdk7-b34)
> are affected.
> Attached you can find a patch against
> At the same time, the patch also fixes a minor flaw in globals.hpp
> where the default value of the 'PrintAssemblyOptions' option, which is
> of type 'ccstr', should really be "" instead of 'false'.
> Regards,
> Volker

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