Peter Molnar got OpenJDK running on s390. This is exciting :-)
Peter Molnar got OpenJDK running on s390. This is exciting :-)
On friday I found the bug why Boehm always crashed with OpenJDK's wrappers. The problem is that the wrappers create a thread which then runs the VM. Boehm doesn't like that. But it can simply be removed:
Index: j2se/src/share/bin/java.c =================================================================== --- j2se/src/share/bin/java.c (revision 244) +++ j2se/src/share/bin/java.c (working copy) @@ -367,7 +367,8 @@ main(int argc, char ** argv) args.classname = classname; args.ifn = ifn; - return ContinueInNewThread(JavaMain, threadStackSize, (void*)&args, ret); +/* return ContinueInNewThread(JavaMain, threadStackSize, (void*)&args, ret); */ + return JavaMain((void*)&args); } }
With that patch we can use OpenJDK's wrappers with CACAO's libjvm:
$ java -version LOG: [0x30021b70] JVM_GetStackAccessControlContext: IMPLEMENT ME! LOG: [0x30021b70] JVM_GetStackAccessControlContext: IMPLEMENT ME! LOG: [0x30021b70] JVM_FindSignal: name=HUP LOG: [0x30021b70] JVM_RegisterSignal: sig=0, handler=0x2, IMPLEMENT ME! LOG: [0x30021b70] JVM_FindSignal: name=INT LOG: [0x30021b70] JVM_RegisterSignal: sig=0, handler=0x2, IMPLEMENT ME! LOG: [0x30021b70] JVM_FindSignal: name=TERM LOG: [0x30021b70] JVM_RegisterSignal: sig=0, handler=0x2, IMPLEMENT ME! LOG: [0x30021b70] JVM_GetStackAccessControlContext: IMPLEMENT ME! LOG: [0x30021b70] JVM_GetStackAccessControlContext: IMPLEMENT ME! openjdk version "1.7.0-internal-fastdebug" OpenJDK Runtime Environment (build 1.7.0-internal-fastdebug-twisti_29_jul_2007_18_33-b00) CACAO (build 0.98+svn, JIT mode)
WOOHOO! :-)
That means we can build OpenJDK with its own tools, by providing a CACAO-Sun build to OpenJDK with ALT_HOTSPOT_IMPORT_PATH. Then CACAO's libjvm gets imported and all tools like javac, javah or rmic are called from the currently builing OpenJDK.
With some small patches and the help of IcedTea I get a fully compiled and working j2re-image on my powerpc-linux box!!!
That is _really_ cool!
j2sdk-image is currently failing because of missing annotations support. But the student working on CACAO's annotations support already has a working implementation for OpenJDK and it will be (hopefully) commited tomorrow. That probably means a new blog soon...
Peter Molnar, a student of the Vienna University of Technology who is doing his thesis on CACAO, did the undoable. But see for yourself.
Here is another output of the prop testcase:
$ cacao prop LOG: [0x30020bd0] JVM_GetStackAccessControlContext: IMPLEMENT ME! LOG: [0x30020bd0] JVM_DesiredAssertionStatus: cls=0x1008a0f0, IMPLEMENT ME! LOG: [0x30020bd0] JVM_DesiredAssertionStatus: cls=0x1008aa50, IMPLEMENT ME! LOG: [0x30020bd0] JVM_DesiredAssertionStatus: cls=0x1008cc30, IMPLEMENT ME! LOG: [0x30020bd0] JVM_DesiredAssertionStatus: cls=0x1008c690, IMPLEMENT ME! LOG: [0x30020bd0] JVM_DesiredAssertionStatus: cls=0x10094d20, IMPLEMENT ME! LOG: [0x30020bd0] JVM_DesiredAssertionStatus: cls=0x10094a50, IMPLEMENT ME! LOG: [0x30020bd0] JVM_DesiredAssertionStatus: cls=0x1008aa50, IMPLEMENT ME! LOG: [0x30020bd0] JVM_DesiredAssertionStatus: cls=0x10094870, IMPLEMENT ME! LOG: [0x30020bd0] JVM_DesiredAssertionStatus: cls=0x100944b0, IMPLEMENT ME! LOG: [0x30020bd0] JVM_DesiredAssertionStatus: cls=0x100942d0, IMPLEMENT ME! LOG: [0x30020bd0] JVM_DesiredAssertionStatus: cls=0x10046690, IMPLEMENT ME! LOG: [0x30020bd0] JVM_FindSignal: name=HUP LOG: [0x30020bd0] JVM_RegisterSignal: sig=0, handler=0x2, IMPLEMENT ME! LOG: [0x30020bd0] JVM_FindSignal: name=INT LOG: [0x30020bd0] JVM_RegisterSignal: sig=0, handler=0x2, IMPLEMENT ME! LOG: [0x30020bd0] JVM_FindSignal: name=TERM LOG: [0x30020bd0] JVM_RegisterSignal: sig=0, handler=0x2, IMPLEMENT ME! LOG: [0x30020bd0] JVM_DesiredAssertionStatus: cls=0x100aaa50, IMPLEMENT ME! LOG: [0x30020bd0] JVM_GetStackAccessControlContext: IMPLEMENT ME! LOG: [0x30020bd0] JVM_DesiredAssertionStatus: cls=0x100acf00, IMPLEMENT ME! LOG: [0x30020bd0] JVM_DesiredAssertionStatus: cls=0x100ad4b0, IMPLEMENT ME! LOG: [0x30020bd0] JVM_DesiredAssertionStatus: cls=0x100ad3c0, IMPLEMENT ME! LOG: [0x30020bd0] JVM_DesiredAssertionStatus: cls=0x100b03c0, IMPLEMENT ME! LOG: [0x30020bd0] JVM_GetStackAccessControlContext: IMPLEMENT ME! LOG: [0x30020bd0] JVM_DesiredAssertionStatus: cls=0x100baa50, IMPLEMENT ME! LOG: [0x30020bd0] JVM_DesiredAssertionStatus: cls=0x100baa50, IMPLEMENT ME! LOG: [0x30020bd0] JVM_DesiredAssertionStatus: cls=0x100ba3c0, IMPLEMENT ME! LOG: [0x30020bd0] JVM_DesiredAssertionStatus: cls=0x100ba0f0, IMPLEMENT ME! LOG: [0x30020bd0] JVM_DesiredAssertionStatus: cls=0x100cc960, IMPLEMENT ME! LOG: [0x30020bd0] JVM_DesiredAssertionStatus: cls=0x100d0c30, IMPLEMENT ME! #all properties: #Fri Jun 22 12:30:16 GMT+01:00 2007 java.runtime.name=OpenJDK Runtime Environment sun.boot.library.path=/home/twisti/cacao/sun/openjdk/jdk/control/build/linux-ppc-fastdebug/lib/ppc/ java.vm.version=0.98+svn java.vm.vendor=CACAO Team java.vendor.url=http\://java.sun.com/ path.separator=\: java.vm.name=CACAO file.encoding.pkg=sun.io user.country=US sun.os.patch.level=unknown java.vm.specification.name=Java Virtual Machine Specification user.dir=/home/twisti/cacao/cacao-sun/tests java.runtime.version=1.7.0-internal-fastdebug-twisti_21_jun_2007_21_30-b00 java.awt.graphicsenv=sun.awt.X11GraphicsEnvironment os.arch=ppc java.io.tmpdir=/tmp line.separator=\n java.vm.specification.vendor=Sun Microsystems Inc. os.name=Linux sun.jnu.encoding=ANSI_X3.4-1968 java.specification.name=Java Platform API Specification java.class.version=50.0 os.version=2.6.18-4-powerpc user.home=/home/twisti user.timezone=GMT+01\:00 java.awt.printerjob=sun.print.PSPrinterJob file.encoding=ANSI_X3.4-1968 java.specification.version=1.7 java.class.path=. user.name=twisti java.vm.specification.version=1.0 sun.arch.data.model=32 java.home=/home/twisti/tmp/cacao-sun/jre user.language=en java.specification.vendor=Sun Microsystems Inc. java.version=1.7.0-internal-fastdebug sun.boot.class.path=/home/twisti/cacao/sun/openjdk/jdk/control/build/linux-ppc-fastdebug/classes/ java.boot.class.path=/home/twisti/cacao/sun/openjdk/jdk/control/build/linux-ppc-fastdebug/classes/ java.vendor=Sun Microsystems Inc. file.separator=/ java.vendor.url.bug=http\://java.sun.com/cgi-bin/bugreport.cgi sun.io.unicode.encoding=UnicodeBig sun.cpu.endian=big sun.desktop=gnome sun.cpu.isalist=
For those who are saying now: "Hey! That's the same output as the last one with the same unimplemented functions!", look at the output again! (hint: os.arch!!!).
I built the OpenJDK completely with CACAO and free GNU Classpath tools. But the build is not complete, there is still some stuff missing and I need to figure out why it does not work. But it's enough to run a bunch of programs on Java 1.7 on PowerPC (and maybe other architectures, will try that) :-)
I will write down more detailed information about how to build this whole thing here.
Since a week or two I'm trying to get CACAO running on OpenJDK's libraries and it's very promising:
$ cacao prop LOG: [0x00002ba1dc8ee0a0] JVM_GetStackAccessControlContext: IMPLEMENT ME! LOG: [0x00002ba1dc8ee0a0] JVM_DesiredAssertionStatus: cls=0x690c00, IMPLEMENT ME! LOG: [0x00002ba1dc8ee0a0] JVM_DesiredAssertionStatus: cls=0x686000, IMPLEMENT ME! LOG: [0x00002ba1dc8ee0a0] JVM_DesiredAssertionStatus: cls=0x690400, IMPLEMENT ME! LOG: [0x00002ba1dc8ee0a0] JVM_DesiredAssertionStatus: cls=0x692800, IMPLEMENT ME! LOG: [0x00002ba1dc8ee0a0] JVM_DesiredAssertionStatus: cls=0x69d600, IMPLEMENT ME! LOG: [0x00002ba1dc8ee0a0] JVM_DesiredAssertionStatus: cls=0x69d000, IMPLEMENT ME! LOG: [0x00002ba1dc8ee0a0] JVM_DesiredAssertionStatus: cls=0x686000, IMPLEMENT ME! LOG: [0x00002ba1dc8ee0a0] JVM_DesiredAssertionStatus: cls=0x69ec00, IMPLEMENT ME! LOG: [0x00002ba1dc8ee0a0] JVM_DesiredAssertionStatus: cls=0x69e400, IMPLEMENT ME! LOG: [0x00002ba1dc8ee0a0] JVM_DesiredAssertionStatus: cls=0x69e000, IMPLEMENT ME! LOG: [0x00002ba1dc8ee0a0] JVM_DesiredAssertionStatus: cls=0x649c00, IMPLEMENT ME! LOG: [0x00002ba1dc8ee0a0] JVM_FindSignal: name=HUP LOG: [0x00002ba1dc8ee0a0] JVM_RegisterSignal: sig=0, handler=0x2, IMPLEMENT ME! LOG: [0x00002ba1dc8ee0a0] JVM_FindSignal: name=INT LOG: [0x00002ba1dc8ee0a0] JVM_RegisterSignal: sig=0, handler=0x2, IMPLEMENT ME! LOG: [0x00002ba1dc8ee0a0] JVM_FindSignal: name=TERM LOG: [0x00002ba1dc8ee0a0] JVM_RegisterSignal: sig=0, handler=0x2, IMPLEMENT ME! LOG: [0x00002ba1dc8ee0a0] JVM_DesiredAssertionStatus: cls=0x6b7e00, IMPLEMENT ME! LOG: [0x00002ba1dc8ee0a0] JVM_GetStackAccessControlContext: IMPLEMENT ME! LOG: [0x00002ba1dc8ee0a0] JVM_DesiredAssertionStatus: cls=0x6b8400, IMPLEMENT ME! LOG: [0x00002ba1dc8ee0a0] JVM_DesiredAssertionStatus: cls=0x6bfa00, IMPLEMENT ME! LOG: [0x00002ba1dc8ee0a0] JVM_DesiredAssertionStatus: cls=0x6bf800, IMPLEMENT ME! LOG: [0x00002ba1dc8ee0a0] JVM_DesiredAssertionStatus: cls=0x6c5600, IMPLEMENT ME! LOG: [0x00002ba1dc8ee0a0] JVM_GetStackAccessControlContext: IMPLEMENT ME! LOG: [0x00002ba1dc8ee0a0] JVM_DesiredAssertionStatus: cls=0x6da200, IMPLEMENT ME! LOG: [0x00002ba1dc8ee0a0] JVM_DesiredAssertionStatus: cls=0x6da200, IMPLEMENT ME! LOG: [0x00002ba1dc8ee0a0] JVM_DesiredAssertionStatus: cls=0x6db200, IMPLEMENT ME! LOG: [0x00002ba1dc8ee0a0] JVM_DesiredAssertionStatus: cls=0x6e4c00, IMPLEMENT ME! LOG: [0x00002ba1dc8ee0a0] JVM_DesiredAssertionStatus: cls=0x6eda00, IMPLEMENT ME! LOG: [0x00002ba1dc8ee0a0] JVM_DesiredAssertionStatus: cls=0x6f8c00, IMPLEMENT ME! LOG: [0x00002ba1dc8ee0a0] JVM_DesiredAssertionStatus: cls=0x6f8200, IMPLEMENT ME! #all properties: #Thu Jun 14 11:23:34 GMT+01:00 2007 java.runtime.name=OpenJDK Runtime Environment sun.boot.library.path=/home/twisti/cacao/sun/openjdk/jdk/control/build/linux-amd64/lib/amd64/ java.vm.version=0.98+svn java.vm.vendor=CACAO Team java.vendor.url=http\://java.sun.com/ path.separator=\: java.vm.name=CACAO file.encoding.pkg=sun.io user.country=US sun.os.patch.level=unknown java.vm.specification.name=Java Virtual Machine Specification user.dir=/home/twisti/cacao/cacao/tests java.runtime.version=1.7.0-internal-twisti_09_may_2007_15_45-b00 java.awt.graphicsenv=sun.awt.X11GraphicsEnvironment os.arch=amd64 java.io.tmpdir=/tmp line.separator=\n java.vm.specification.vendor=Sun Microsystems Inc. os.name=Linux sun.jnu.encoding=ANSI_X3.4-1968 java.specification.name=Java Platform API Specification java.class.version=50.0 os.version=2.6.21-1-amd64 user.home=/home/twisti user.timezone=GMT+01\:00 java.awt.printerjob=sun.print.PSPrinterJob file.encoding=ANSI_X3.4-1968 java.specification.version=1.7 java.class.path=. user.name=twisti java.vm.specification.version=1.0 sun.arch.data.model=64 java.home=/home/twisti/tmp/cacao/jre user.language=en java.specification.vendor=Sun Microsystems Inc. java.version=1.7.0-internal sun.boot.class.path=/home/twisti/cacao/sun/openjdk/jdk/control/build/linux-amd64/j2sdk-image/jre/lib/rt.jar java.boot.class.path=/home/twisti/cacao/sun/openjdk/jdk/control/build/linux-amd64/j2sdk-image/jre/lib/rt.jar java.vendor=Sun Microsystems Inc. file.separator=/ java.vendor.url.bug=http\://java.sun.com/cgi-bin/bugreport.cgi sun.io.unicode.encoding=UnicodeLittle sun.cpu.endian=little sun.desktop=gnome sun.cpu.isalist=
I still have a problem with resources and I don't know where the problem is. I suspect some string-issues. I have to add some debugging code into OpenJDK's native zip code.
When javac works (it does not because of the resouce problem I mentioned above), the next thing will be to replace HotSpot's libjvm.so by CACAO's and try to build it on some architectures that are not supported by HotSpot, like PowerPC.
Finally I got a blog! Damn, this internet is hip...
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