ADDITIONAL SYSTEM INFORMATION :
SunOS 5.11 11.3 sun4v sparc sun4v
jdk-11.0.20

A DESCRIPTION OF THE PROBLEM :
In our application we call a native (c) code from our java code using jni. Since the native code is used to allocate memory, we replaces the default signal handlers with our own implementation. To do so, we use the LD_PRELOAD_64 environment variable on solaris sparc and set it to 'libjsig.so'. The library is getting linked but the symbol 'JVM_begin_signal_setting' cannot be found.

Using the LD_DEBUG=all environment variable on Solaris we could see the following:

20755: file=libjsig.so; preloading
20755: find object=libjsig.so; searching
20755: trying path=<..>/solaris_sparc_64/jre/lib/server/libjsig.so
20755: file=<..>/solaris_sparc_64/jre/lib/server/libjsig.so [ ELF ]; generating link map
20755: file=<..>/solaris_sparc_64/jre/lib/server/libjsig.so; analyzing [ RTLD_LAZY RTLD_GLOBAL RTLD_WORLD RTLD_NODELETE ]
20755: file=libc.so.1; needed by <..>/solaris_sparc_64/jre/lib/server/libjsig.so
20755: search path=$ORIGIN (RUNPATH/RPATH from file <..>/solaris_sparc_64/jre/lib/server/libjsig.so)
20755: version needed processing: file=<..>/solaris_sparc_64/jre/lib/server/libjsig.so
20755: file=libdl.so.1; needed by <..>/solaris_sparc_64/jre/lib/server/libjsig.so
20755: search path=$ORIGIN (RUNPATH/RPATH from file <..>/solaris_sparc_64/jre/lib/server/libjsig.so)
20755: version needed processing: file=<..>/solaris_sparc_64/jre/lib/server/libjsig.so
20755: relocation processing: file=/<..>/solaris_sparc_64/jre/lib/server/libjsig.so
20755: relocation processing: file=<..>/solaris_sparc_64/jre/lib/server/libjsig.so; finished


So the library is getting preloaded.
Java will then check if the library is preloaded by trying to get a pointer to the method "JVM_begin_signal_setting". This will result in a fatal error:

20755: 2: symbol=JVM_begin_signal_setting; dlsym() called from file=<..>/solaris_sparc_64/jre/lib/server/libjvm.so [ RTLD_DEFAULT ]
20755: 2: symbol=JVM_begin_signal_setting; lookup in file=<..>/solaris_sparc_64/jre/bin/java [ ELF ]
20755: 2: symbol=JVM_begin_signal_setting; lookup in file=<..>/solaris_sparc_64/jre/lib/server/libjsig.so [ ELF ]
20755: 2: symbol=JVM_begin_signal_setting; lookup in file=/lib/sparcv9/libc.so.1 [ ELF ]
20755: 2: symbol=JVM_begin_signal_setting; lookup in file=/lib/sparcv9/libz.so.1 [ ELF ]
20755: 2: symbol=JVM_begin_signal_setting; lookup in file=<..>/solaris_sparc_64/jre/bin/../lib/jli/libjli.so [ ELF ]
20755: 2: symbol=JVM_begin_signal_setting; lookup in file=/lib/sparcv9/libthread.so.1 [ ELF ]
20755: 2: symbol=JVM_begin_signal_setting; lookup in file=/lib/sparcv9/libdl.so.1 [ ELF ]
20755: 2: symbol=JVM_begin_signal_setting; lookup in file=<..>/solaris_sparc_64/jre/lib/server/libjvm.so [ ELF ]
20755: 2: symbol=JVM_begin_signal_setting; lookup in file=/lib/64/libm.so.2 [ ELF ]
20755: 2: symbol=JVM_begin_signal_setting; lookup in file=/lib/64/libsocket.so.1 [ ELF ]
20755: 2: symbol=JVM_begin_signal_setting; lookup in file=/usr/lib/64/libsched.so.1 [ ELF ]
20755: 2: symbol=JVM_begin_signal_setting; lookup in file=/lib/64/libdoor.so.1 [ ELF ]
20755: 2: symbol=JVM_begin_signal_setting; lookup in file=/usr/lib/64/libdemangle.so.1 [ ELF ]
20755: 2: symbol=JVM_begin_signal_setting; lookup in file=/lib/64/libnsl.so.1 [ ELF ]
20755: 2: symbol=JVM_begin_signal_setting; lookup in file=/lib/64/librt.so.1 [ ELF ]
20755: 2: symbol=JVM_begin_signal_setting; lookup in file=/lib/64/libkstat.so.1 [ ELF ]
20755: 2: symbol=JVM_begin_signal_setting; lookup in file=/usr/lib/64/libCrun.so.1 [ ELF ]
20755: 2: symbol=JVM_begin_signal_setting; lookup in file=/lib/64/libmp.so.2 [ ELF ]
20755: 2: symbol=JVM_begin_signal_setting; lookup in file=/lib/64/libucrypto.so.1 [ ELF ]
20755: 2: symbol=JVM_begin_signal_setting; lookup in file=/lib/64/libcryptoutil.so.1 [ ELF ]
20755: 2: symbol=JVM_begin_signal_setting; lookup in file=/lib/64/libelf.so.1 [ ELF ]
20755: 2: symbol=JVM_begin_signal_setting; lookup in file=<..>/solaris_sparc_64/jre/lib/libverify.so [ ELF ]
20755: 2: symbol=JVM_begin_signal_setting; lookup in file=<..>/solaris_sparc_64/jre/lib/libjava.so [ ELF ]
20755: 2: symbol=JVM_begin_signal_setting; lookup in file=/lib/64/libscf.so.1 [ ELF ]
20755: 2: symbol=JVM_begin_signal_setting; lookup in file=<..>/solaris_sparc_64/jre/lib/libjimage.so [ ELF ]
20755: 2: symbol=JVM_begin_signal_setting; lookup in file=/lib/64/libuutil.so.1 [ ELF ]
20755: 2: symbol=JVM_begin_signal_setting; lookup in file=/lib/64/libgen.so.1 [ ELF ]
20755: 2: symbol=JVM_begin_signal_setting; lookup in file=/lib/64/libnvpair.so.1 [ ELF ]
20755: 2: ld.so.1: java: fatal: JVM_begin_signal_setting: can't find symbol

The problem seems to be that the symbols are not getting exported correctly.
I cannot configure the jdk Makefile on our local solaris server that's why I cannot be more specific about the problem ... sorry
I have tried using the libjsig.so from jdk-8 and it has worked without a problem. So the problem is specific to jdk-11 and Solaris Sparc.











REGRESSION : Last worked in version 8u381

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
13201: 2: symbol=JVM_begin_signal_setting; dlsym() called from file=<..>/solaris_sparc_64/jre/lib/server/libjvm.so [ RTLD_DEFAULT ]
13201: 2: symbol=JVM_begin_signal_setting; lookup in file=<..>/solaris_sparc_64/jre/bin/java [ ELF ]
13201: 2: symbol=JVM_begin_signal_setting; lookup in file=<..>/solaris_sparc_64/jre/lib/server/libjsig.so [ ELF ]
13201: 2: binding file=<..>/solaris_sparc_64/jre/lib/server/libjvm.so to file=<..>/solaris_sparc_64/jre/lib/server/libjsig.so: symbol 'JVM_begin_signal_setting'
ACTUAL -
ld.so.1: java: fatal: JVM_begin_signal_setting: can't find symbol

CUSTOMER SUBMITTED WORKAROUND :
We have compiled libjsig using the following commands:

gcc -g0 -O3 -fno-strict-aliasing -Wall -fmessage-length=0 -pthreads -mcpu=v9 -fPIC -m64 -Wno-unused-function -c jsig.c -o jsig.o
gcc -shared -olibjsig.so jsig.o -fPIC -m64



FREQUENCY : always