8173941 Re: SA does not work if executable is DSO

[Andrew Haley]

Okay, thanks.

The patch will have to be submitted to JDK 9 first and then back-
ported to earlier releases.  Unfortunately it doesn't work on JDK 9.
I don't know why: I spent some time looking at it, but I couldn't
figure out what was wrong.

Is there any way you could have a look?  This is using hg.openjdk.java.net/jdk9/hs
on F25.

Thanks,

Andrew.


[aph at localhost hs-8173941]$ LIBSAPROC_DEBUG=1 ./build/linux-x86_64-normal-server-fastdebug/images/jdk/bin/jhsdb jstack --core core.63600 --exe build/linux-x86_64-normal-server-fastdebug/images/jdk/bin/java
Attaching to core core.63600 from executable build/linux-x86_64-normal-server-fastdebug/images/jdk/bin/java, please wait...
libsaproc DEBUG: Note header with n_type = 3 and n_descsz = 136
libsaproc DEBUG: Note header with n_type = 1 and n_descsz = 336
libsaproc DEBUG: got integer regset for lwp 63600
libsaproc DEBUG: integer regset
...
libsaproc DEBUG: Note address of NT_FILE is 0x564be32e5000
libsaproc DEBUG: ELF interpreter /lib64/ld-linux-x86-64.so.2
libsaproc DEBUG: address of _DYNAMIC p_vaddr is 0x201d28
libsaproc DEBUG: address of _DYNAMIC is 0x564be32e6d28
libsaproc DEBUG: ---- sorted virtual address map ----
...
libsaproc DEBUG: base = 0x7fe62227c000  size = 4096
libsaproc DEBUG: base = 0x7ffeabb33000  size = 135168
libsaproc DEBUG: base = 0x7ffeabbc0000  size = 8192
libsaproc DEBUG: base = 0xffffffffff600000      size = 4096
libsaproc DEBUG: can't locate map_info at 0x564be32e7000
libsaproc DEBUG: core read failed for 16 byte(s) @ 0x564be32e7000 (8 more bytes)
libsaproc DEBUG: 1: can't read debug info from _DYNAMIC
Error attaching to core file: Can't attach to the core file
sun.jvm.hotspot.debugger.DebuggerException: Can't attach to the core file
        at jdk.hotspot.agent/sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.attach0(Native Method)
        at jdk.hotspot.agent/sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.attach(LinuxDebuggerLocal.java:286)
        at jdk.hotspot.agent/sun.jvm.hotspot.HotSpotAgent.attachDebugger(HotSpotAgent.java:679)
        at jdk.hotspot.agent/sun.jvm.hotspot.HotSpotAgent.setupDebuggerLinux(HotSpotAgent.java:617)