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21
22
23Briefly, the tests cover the following scenarios:
241. prepre
25   set signal handlers -> create JVM -> send signals -> destroy JVM -> check signal handlers were called
26
272. prepost
28   set signal handlers -> create JVM -> destroy JVM -> send signals  -> check signal handlers were called
29
303. postpre
31   create JVM ->set signal handlers -> send signals -> destroy JVM -> check signal handlers were called
32
334. postpost
34   create JVM -> set signal handlers -> destroy JVM -> send signals  -> check signal handlers were called
35
36There is one more scenario called 'nojvm'.
37In this case no jvm is created, so pure signal testing is done.
38
39Signal handlers don't do anything, so the only fact that signal handler was called is checked.
40Also 2 different ways of setting signal handlers are tested: sigaction, sigset.
41
42For 'postpre' and 'postpro' libjsig.so is used to chain signal handlers behind VM installed ones.
43
44=> Current tests cover the following cases (don't count 'nojvm' scenario):
451. Support for pre-installed signal handlers when the HotSpot VM is created.
462. Support for signal handler installation after the HotSpot VM is created inside JNI code
47
48
49Notes:
50
51SIGQUIT, SIGTERM, SIGINT, and SIGHUP signals cannot be chained.
52If the application needs to handle these signals, the -Xrs option needs
53to be specified. So, test these signals only with -Xrs flag.
54
55On Linux and Mac OS X, SIGUSR2 is used to implement suspend and resume. So,
56don't test SIGUSR2 on Linux and Mac OS X.
57
58SIGJVM1 and SIGJVM2 exist only on Solaris and are reserved for exclusive use
59by the JVM. So don't test SIGJVM1 and SIGJVM2.
60