Hotspot segfaulting on Linux SPARC (original) (raw)

David Holmes david.holmes at oracle.com
Tue Apr 10 21:45:57 UTC 2018

On 11/04/2018 5:39 AM, John Paul Adrian Glaubitz wrote:

On 04/09/2018 11:31 PM, David Holmes wrote:

Looks like you will need compiler folk to jump in here. No idea why this would be linux-sparc specific, but would need to see exactly what was being compiled at the time the invalid code sequence was encountered.

Sorry. This is what happens when code is no longer actively maintained. Update: I just ran "hg update && hg update --clean", applied the following diff which includes the suggested fix for 8201360 and the change suggested by Zhengyu: glaubitz at deb4g:/srv/glaubitz/hs$ hg diff diff -r 00805b129186 make/hotspot/lib/CompileJvm.gmk --- a/make/hotspot/lib/CompileJvm.gmk   Tue Apr 10 11:43:40 2018 -0700 +++ b/make/hotspot/lib/CompileJvm.gmk   Tue Apr 10 22:38:12 2018 +0300 @@ -219,7 +219,7 @@ _TOOLCHAIN := TOOLCHAINLINKCXX, _ _OUTPUTDIR := $(JVMLIBOUTPUTDIR), _ _SRC := $(JVMSRCDIRS), _ _-    EXTRAFILES := $(DTRACEEXTRASOURCEFILES), _ +    EXTRAFILES := $(BUILDLIBJVMEXTRAFILES) _$(DTRACEEXTRASOURCEFILES), _ _EXCLUDES := $(JVMEXCLUDES), _ _EXCLUDEFILES := $(JVMEXCLUDEFILES), _ _EXCLUDEPATTERNS := $(JVMEXCLUDEPATTERNS), _ diff -r 00805b129186 src/hotspot/oscpu/linuxsparc/vmversionlinuxsparc.cpp --- a/src/hotspot/oscpu/linuxsparc/vmversionlinuxsparc.cpp Tue Apr 10 11:43:40 2018 -0700 +++ b/src/hotspot/oscpu/linuxsparc/vmversionlinuxsparc.cpp Tue Apr 10 22:38:12 2018 +0300 @@ -48,7 +48,7 @@ if (vstr != NULL) { // We have a matching line and a valid starting point to the value of // the field, copy the string for keeps. -          string = strdup(vstr); +          string = os::strdup(vstr, mtInternal); break; } } and now the crash is different: glaubitz at deb4g:/srv/glaubitz/hs$ ./build/linux-sparcv9-normal-server-fastdebug/jdk/bin/java --version Error occurred during initialization of boot layer java.lang.module.FindException: Error reading module: /srv/glaubitz/hs/build/linux-sparcv9-normal-server-fastdebug/jdk/modules/java.datatransfer Caused by: java.lang.module.InvalidModuleDescriptorException: Illegal load factor: -1.2197928E-12 glaubitz at deb4g:/srv/glaubitz/hs$ What exactly is the load factor?

The only reference to that message I can find is from HashMap/HashSet where the load factor defines how full the collection becomes before it resizes. I would have to guess some kind of floating-point issue here - a very small number rather than 0 perhaps?

David

Adrian

More information about the hotspot-dev mailing list