Why adding URL to -X? Help on -X should be printed with 'java -X'. BTW, DRLVM does not print anything - launcher does not pass -X to DLRVM.
Pavel. P.S. BTW, what I've proposed will solve this issue. On 6/20/07, Gregory Shimansky <[EMAIL PROTECTED]> wrote:
Pavel Pervov wrote: > Vladimir, > > 'java -X' usually prints out help on options, which start with -X. > > What you was asking about as I understood that has syntax of > -XX:<vm_option>[=<value>]. Sun's VM has help on these options on the Web > page and no means to print it out to console. > > So, I'm -1 here for printing help on -XX options. I agree that it is better to provide help on DRLVM internal properties on web site instead of printing it to console. We can also have a man page in the future which would include that text too. Adding an URL to help on -X is a good idea. > If community still decide to print such help - there is 4-th way to do so > (which will require changing.launcher). > 1) launcher recognizes several generic options and is able to determine > application class or jar name. > 2) if no -vmdir or -vmdll is specified on command line - launcher tries to > load that VM, otherwise defaults to <launcher location>/default/harmonyvm > and tryies to load this one. If it fails - it prints short help message as > it does right now, when launched with some unrecognizable property name. > 3) if library is loaded successfully - launcher constructs arguments array > (as it does right now) and calls to JNI_CreateJavaVM from loaded VM > library. > 4) if this call returns (-?, -h, -help and -X do not return from > JNI_CreateJavaVM) and if launcher finds class of jar name on the command > line - it proceeds with program startup. > > What do you think on such generic startup sequence? > > WBR, > Pavel. > > On 6/20/07, Vladimir Beliaev <[EMAIL PROTECTED]> wrote: >> >> Hello, All >> >> I want to add a *help *for drlvm specific system properties like '- >> Xvm.assert_dialog=false' (as asked in >> HARMONY-3409<http://issues.apache.org/jira/browse/HARMONY-3409> >> ). >> >> *Could you send your opinion on what way this can be done?* There are >> three >> safe ways to do this & non of them seems to be really good (please see >> technical details in >> HARMONY-3409<http://issues.apache.org/jira/browse/HARMONY-3409>). >> >> >> *way 1*: support 'java -Xhelp:prop foo' command line... Like if one runs >> 'java -X' then this help says "run '-Xhelp:prop foo' to see sytem >> properties"... In short: if one does not specify this 'foo' at the end, >> then >> a generic launcher consider command line as broken (no 'mainClass' is >> specified) & does not invoke JNI_CreateJavaVM (which print a help)... >> >> *way 2*: support 'java -Xhelp:prop' command line (i.e. w/o dummy >> 'foo')... >> To implement this the *generic* launcher is to be changed to recognize >> '-Xhelp:' as a 'help' option (like it recognizes ? -h -help -X now). >> Because >> of other VMs do not support such a '-Xhelp:' option we get >> *generic*launcher to be a bit drlvm-specific... >> >> *way 3*: be like other VMs and do not print a 'help for drlvm internal >> properties'. Instead, 'java -X' help output may provide a URL to >> harmony.apache.org html document explaining drlvm internal system >> properties... >> >> I would pick a *way 1* as it does not change *generic *launcher & we are >> free to do every thing we want with -X... I do not like *way 3* at all - >> it >> is not a big deal to create such a document, still it is one more >> document >> to be supported (I believe it may become out-of-date pretty in couple >> months)... >> >> So, what do you think? >> >> -- >> Thanks >> Vladimir Beliaev >> Intel Middleware Products Division >> > > > -- Gregory
-- Pavel Pervov, Intel Enterprise Solutions Software Division
