JDK-8351309 disabled libjsig on static JDK. TestBreakSignalThreadDump.java#with_jsig and XCheckJSig.java both uses libsig.so. Using libjsig.so is not a good solution for signal chaining on static JDK, as that still requires a standalone JDK binary providing the libjsig.so.

JDK-8351367 is for deciding the signal chaining support on static JDK for longer term. For now, TestBreakSignalThreadDump.java#with_jsig and XCheckJSig.java should be disabled on static JDK.