UseG1GC unimplemented in generate_Reference_get_entry()?
the.6th.month at gmail.com
the.6th.month at gmail.com
Mon Sep 10 16:33:15 PDT 2012
hi, chris, thanks very much indeed, hope icedtea could support g1 cuz it is
simply a bloody good stuff
On Sep 11, 2012 2:01 AM, "Chris Phillips @ T O" <ChrisPhi at lgonqn.org> wrote:
> Hi
> You should probably address this to the icedtea list or the Zero list as
> zero is effectively
> unsupported by the maintainers of the g1 code (they don't build or test
> with it...)
> In any event the code that you are using was re-enabled by me recently so
> when
> I get some time (still working on jsr 292 atm), I'll try to re-enable g1
> with zero [no promises].
> If you can do it then submit a patch...
>
> Cheers!
> Chris
>
> On 10/09/12 01:49 PM, the.6th.month at gmail.com wrote:
>
> hi,all:
>
> I just compiled an icedtea-2.3.2 version on my laptop, the kernel
> version is Linux-3.5.3. I manually built it for the purpose of systemtap,
> and hence added --enable-systemtap compile option.
>
> Then I ran a simple test program with vm args: -Xms1024m -Xmx1024m
> -Xmn256m -XX:PermSize=256m -XX:+UseG1GC, and I got a core dump. The bt
> output from gdb is shown below:
> Using host libthread_db library "/lib64/libthread_db.so.1".
> Core was generated by `/usr/lib64/java/bin/java -Xms1024m -Xmx1024m
> -Xmn256m -XX:PermSize=256m -XX:+Us'.
> Program terminated with signal 6, Aborted.
> #0 0x00007fcfb8950a25 in raise () from /lib64/libc.so.6
> (gdb) bt
> #0 0x00007fcfb8950a25 in raise () from /lib64/libc.so.6
> #1 0x00007fcfb89521d8 in abort () from /lib64/libc.so.6
> #2 0x00007fcfb853eaa1 in os::abort (dump_core=true)
> at
> /tmp/icedtea-2.3.2/openjdk/hotspot/src/os/linux/vm/os_linux.cpp:1589
> #3 0x00007fcfb85f18cf in VMError::report_and_die (this=0x7fcfb970f7d0)
> at
> /tmp/icedtea-2.3.2/openjdk/hotspot/src/share/vm/utilities/vmError.cpp:1004
> #4 0x00007fcfb836c95f in report_vm_error (detail_msg=0x0,
> error_msg=0x7fcfb860cd26 "Unimplemented()",
> line=<optimized out>, file=<optimized out>)
> at
> /tmp/icedtea-2.3.2/openjdk/hotspot/src/share/vm/utilities/debug.cpp:220
> #5 report_vm_error (detail_msg=0x0, error_msg=0x7fcfb860cd26
> "Unimplemented()", line=<optimized out>,
> file=<optimized out>) at
> /tmp/icedtea-2.3.2/openjdk/hotspot/src/share/vm/utilities/debug.cpp:260
> #6 report_unimplemented (file=<optimized out>, line=<optimized out>)
> at
> /tmp/icedtea-2.3.2/openjdk/hotspot/src/share/vm/utilities/debug.cpp:261
> #7 0x00007fcfb836c15d in generate_Reference_get_entry
> (this=0x7fcfb970fb00)
> at
> /tmp/icedtea-2.3.2/openjdk/hotspot/src/cpu/zero/vm/cppInterpreter_zero.cpp:1649
> #8 AbstractInterpreterGenerator::generate_method_entry
> (this=0x7fcfb970fb00, kind=<optimized out>)
> at
> /tmp/icedtea-2.3.2/openjdk/hotspot/src/cpu/zero/vm/cppInterpreter_zero.cpp:1725
> #9 0x00007fcfb8368634 in CppInterpreterGenerator::generate_all
> (this=0x7fcfb970fb00)
> at
> /tmp/icedtea-2.3.2/openjdk/hotspot/src/share/vm/interpreter/cppInterpreter.cpp:128
> #10 0x00007fcfb8367be2 in CppInterpreter::initialize ()
> at
> /tmp/icedtea-2.3.2/openjdk/hotspot/src/share/vm/interpreter/cppInterpreter.cpp:45
> #11 0x00007fcfb84182e9 in interpreter_init ()
> at
> /tmp/icedtea-2.3.2/openjdk/hotspot/src/share/vm/interpreter/interpreter.cpp:113
> #12 0x00007fcfb83ea4d5 in init_globals () at
> /tmp/icedtea-2.3.2/openjdk/hotspot/src/share/vm/runtime/init.cpp:102
> #13 0x00007fcfb85c2bdc in Threads::create_vm (args=<optimized out>,
> canTryAgain=0x7fcfb970fd90)
> at
> /tmp/icedtea-2.3.2/openjdk/hotspot/src/share/vm/runtime/thread.cpp:3182
> #14 0x00007fcfb844a67f in JNI_CreateJavaVM (vm=0x7fcfb970fe30,
> penv=0x7fcfb970fe40, args=<optimized out>)
> at /tmp/icedtea-2.3.2/openjdk/hotspot/src/share/vm/prims/jni.cpp:5112
> #15 0x00007fcfb90f56dc in InitializeJVM (penv=0x7fcfb970fe40,
> pvm=0x7fcfb970fe30, ifn=<optimized out>)
> at ../../../src/share/bin/java.c:1115
> ---Type <return> to continue, or q <return> to quit---
> #16 JavaMain (_args=<optimized out>) at ../../../src/share/bin/java.c:360
> #17 0x00007fcfb9306eae in start_thread () from /lib64/libpthread.so.0
> #18 0x00007fcfb8a0ffed in clone () from /lib64/libc.so.6
>
> And I dug
> into /tmp/icedtea-2.3.2/openjdk/hotspot/src/cpu/zero/vm/cppInterpreter_zero.cpp:1649
> following the stacktrace, and discovered that:
> address InterpreterGenerator::generate_Reference_get_entry(void) {
> #ifndef SERIALGC
> if (UseG1GC) {
> // We need to generate have a routine that generates code to:
> // * load the value in the referent field
> // * passes that value to the pre-barrier.
> //
> // In the case of G1 this will record the value of the
> // referent in an SATB buffer if marking is active.
> // This will cause concurrent marking to mark the referent
> // field as live.
> Unimplemented();
> }
> #endif // SERIALGC
>
> // If G1 is not enabled then attempt to go through the accessor entry
> point
> // Reference.get is an accessor
> return generate_accessor_entry();
> }
>
> I am wondering how the generate_Reference_get_entry function is
> triggered and why it runs into Unimplemented() when UseG1GC enabled.
> Moreover, is the iced-tea 2.3.2 shipped with G1GC by default or I should
> enable it with some sort of compilation option?
>
> Any help would be truly appreciated.
>
> All the best,
> Leon
>
>
>
> _______________________________________________
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>
>
>
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