Hi, I refactored LinuxAMD64CFrame.java . It works fine in serviceability/sa tests and all tests on submit repo (mach5-one-ysuenaga-JDK-8234624-2-20191128-0928-7059923). Could you review new webrev?
http://cr.openjdk.java.net/~ysuenaga/JDK-8234624/webrev.01/ The diff from previous webrev is here: http://hg.openjdk.java.net/jdk/submit/rev/4bc47efbc90b Thanks, Yasumasa On 2019/11/25 14:08, Yasumasa Suenaga wrote:
Hi all, Please review this change: JBS: https://bugs.openjdk.java.net/browse/JDK-8234624 webrev: http://cr.openjdk.java.net/~ysuenaga/JDK-8234624/webrev.00/ According to 2.7 Stack Unwind Algorithm in System V Application Binary Interface AMD64 Architecture Processor Supplement [1], we need to use DWARF in .eh_frame or .debug_frame for stack unwinding. As JDK-8022183 said, omit-frame-pointer is enabled by default since GCC 4.6, so system library (e.g. libc) might be compiled with this feature. However `jhsdb jstack --mixed` does not do so, it uses base pointer register (RBP). So it might be lack of stack frames. I guess JDK-8219201 is caused by same issue. Thanks, Yasumasa [1] https://software.intel.com/sites/default/files/article/402129/mpx-linux64-abi.pdf
