OpenJDK 64-Bit Server VM warning: increase O_BUFLEN in ostream.hpp -- output truncated

[Thomas Stüfe]

On Wed, Apr 8, 2015 at 5:27 PM, Andrew Haley <aph at redhat.com> wrote:

> On 04/08/2015 04:10 PM, Thomas Stüfe wrote:
> > Hi Andrew,
> >
> > yes, it is lame. The short term answer would be to fix the expression
> which
> > prints out the classpath. Where is this print statement?
>
> ostream.cpp:
>
>       for (SystemProperty* p = Arguments::system_properties(); p != NULL;
> p = p->next()) {
>         xs->text()->print_cr("%s=%s", p->key(), p->value());
>
> (gdb) p p->key()
> $24 = 0x3ffb00016a0 "sun.boot.class.path"
> (gdb) p p->value()
> $25 = 0x3ffb00029e0
> "/local/aarch64/dev/build/linux-aarch64-normal-server-slowdebug/jdk/modules/jdk.zipfs:/local/aarch64/dev/build/linux-aarch64-normal-server-slowdebug/jdk/modules/java.transaction:/local/aarch64/dev/buil"...
>
> > The long term answer could be e.g.: we could implement our own printf()
> > routines. We (SAP) actually already did this inside our JVM for parts of
> > our own tracing system. It is not rocket science, just a bit of work. If
> > done right, there are several advantages, among others that you do not
> need
> > temporary buffers for the libc printf() to print into. Depending on
> > interest, I could try to contribute this to the OpenJDK.
>
> In this case we don't need formatted printing at all.
>
>       for (SystemProperty* p = Arguments::system_properties(); p != NULL;
> p = p->next()) {
>         outputStream *text = xs->text();
>         text->print_raw(p->key());
>         text->put('=');
>         text->print_raw_cr(p->value());
>       }
>
> works just fine.  It's a bit of a kludge tho'.  :-)
>

Looks like a valid fix to me :)

Thomas


>
> Andrew.
>
>