Debugging segmentation faults in the JVM on linux-powerpc

[John Paul Adrian Glaubitz]

On 06/09/2017 05:26 PM, Alan Bateman wrote:
> Something fishy if you are running our of direct memory during startup. Does -Xlog:init=debug print any more?

It does:

root at kapitsa:/srv/sid-powerpc-sbuild/build/openjdk-9-2gWg6b/openjdk-9-9~b170/build/jdk/bin# ./java -Xlog:init=debug
Error occurred during initialization of boot layer
java.lang.OutOfMemoryError: Direct buffer memory
	at java.base/java.nio.Bits.reserveMemory(Bits.java:187)
	at java.base/java.nio.DirectByteBuffer.<init>(DirectByteBuffer.java:123)
	at java.base/java.nio.ByteBuffer.allocateDirect(ByteBuffer.java:310)
	at java.base/sun.nio.ch.Util.getTemporaryDirectBuffer(Util.java:232)
	at java.base/sun.nio.ch.IOUtil.read(IOUtil.java:195)
	at java.base/sun.nio.ch.FileChannelImpl.read(FileChannelImpl.java:165)
	at java.base/sun.nio.ch.ChannelInputStream.read(ChannelInputStream.java:65)
	at java.base/sun.nio.ch.ChannelInputStream.read(ChannelInputStream.java:109)
	at java.base/sun.nio.ch.ChannelInputStream.read(ChannelInputStream.java:103)
	at java.base/java.io.BufferedInputStream.fill(BufferedInputStream.java:246)
	at java.base/java.io.BufferedInputStream.read(BufferedInputStream.java:265)
	at java.base/java.io.DataInputStream.readInt(DataInputStream.java:392)
	at java.base/jdk.internal.module.ModuleInfo.doRead(ModuleInfo.java:185)
	at java.base/jdk.internal.module.ModuleInfo.read(ModuleInfo.java:129)
	at java.base/jdk.internal.module.ModulePath.readExplodedModule(ModulePath.java:669)
	at java.base/jdk.internal.module.ModulePath.readModule(ModulePath.java:321)
	at java.base/jdk.internal.module.ModulePath.scanDirectory(ModulePath.java:285)
	at java.base/jdk.internal.module.ModulePath.scan(ModulePath.java:233)
	at java.base/jdk.internal.module.ModulePath.scanNextEntry(ModulePath.java:191)
	at java.base/jdk.internal.module.ModulePath.find(ModulePath.java:155)
	at java.base/java.lang.module.ModuleFinder$1.lambda$find$0(ModuleFinder.java:195)
	at java.base/java.security.AccessController.doPrivileged(Native Method)
	at java.base/java.lang.module.ModuleFinder$1.find(ModuleFinder.java:196)
	at java.base/jdk.internal.module.ModuleBootstrap.boot(ModuleBootstrap.java:136)
	at java.base/java.lang.System.initPhase2(System.java:2003)
root at kapitsa:/srv/sid-powerpc-sbuild/build/openjdk-9-2gWg6b/openjdk-9-9~b170/build/jdk/bin#

-- 
 .''`.  John Paul Adrian Glaubitz
: :' :  Debian Developer - glaubitz at debian.org
`. `'   Freie Universitaet Berlin - glaubitz at physik.fu-berlin.de
  `-    GPG: 62FF 8A75 84E0 2956 9546  0006 7426 3B37 F5B5 F913