JDK-8036003: Add variable not to separate debug information.

[Daniel D. Daugherty]

The proper way to fix this is to disable FDS. We should not need
yet another option to control debug info.

Dan


On 2/28/14 4:13 AM, David Holmes wrote:
> Hi,
>
> As I put in the bug report this seems way too complicated. Seems to me
> all you need to do to get what you want is not use FDS and not strip the
> symbols from the binary. The former is trivial. The latter is more
> awkward as the strip policy stuff does not work as I would want it to
> work, but still doable.
>
> David
>
> On 28/02/2014 7:18 PM, Yasumasa Suenaga wrote:
>> Hi all,
>>
>>
>> Currently, configure script can accept --disable-debug-symbols and
>> --disable-zip-debug-info as controlling to generate debug information.
>> However, current makefiles cannot build ELF binaries which is contained
>> debug information with "images" target.
>>
>> Some Linux distros use RPM as package manager.
>> RPM is built by rpmbuild command, it strips symbols and debug information
>> during to generate rpm packages.
>> https://fedoraproject.org/wiki/Packaging:Debuginfo
>>
>> For example, OpenJDK8 in Fedora20 ships libjvm.so and libjvm.debuginfo .
>> libjvm.debuginfo is generated in OpenJDK's makefiles, however it does not
>> contain debug information. Actual debug information is shipped by OpenJDK
>> debuginfo package.
>> This packaging is important when we have to debug JVM/JNI libraries.
>> If we want to use debugging tools (GDB, SystemTap, etc...), they may requires
>> debuginfo package. Debuggee (e.g. libjvm.so) points libjvm.so.debug which is
>> located at sub directory in /usr/lib/debug . It is defined in ELF section
>> (.note.gnu.build-id) of libjvm.so . However libjvm.so.debug does not contain
>> valid debug information. We need to access libjvm.debuginfo.debug at same location.
>>
>>
>> When we think to build OpenJDK rpm packages, we have to build ELF binaries
>> which contain all debug information. we should not to separate debug information.
>>
>>
>> Thus I want to add a variable "SEPARATED_DEBUGINFO_FILES" .
>> If we pass "SEPARATED_DEBUGINFO_FILES=false" to make command, "make" does not
>> execute objcopy command for generating debuginfo binaries.
>>
>> If we build rpm packages, we also have to add "STRIP_POLICY=no_strip" to arguments
>> of make command. Or ELF binaries will be stripped.
>>
>>
>> I've uploaded webrev for this enhancement.
>> This is separated 3-part: top of forest, hotspot, jdk
>> http://cr.openjdk.java.net/~ysuenaga/JDK-8036003/
>>
>> Please review it and sponsoring!
>>
>>
>> Thanks,
>>
>> Yasumasa
>>
>>
>> P.S.
>>    I tried to add SEPARATED_DEBUGINFO_FILES as a configure option like
>>    "--disable-separated-debug-info" .
>>    I ran configure which is located at jdk9/dev directory after I ran autoconf
>>    and common/autoconf/autogen.sh. However it failed.
>>
>>    I guess this is caused by changeset as below.
>>       JDK-8035495: Improvements in autoconf integration
>>       http://hg.openjdk.java.net/jdk9/dev/rev/6e29cd9ac2b4
>>
>>    This changes add "CHECKME" option to configure script. However, this changes
>>    affects "configure" only. It should change "configure.ac" .
>>