Summary: Use @ignore to exclude failing tests
Reviewed-by: coleenp, ctornqvi, mseledtsov
Contributed-by: george.triantafillou@oracle.com

Summary: Added checking for gcc and simplified the sig_handler() in the test case
Reviewed-by: dcubed, coleenp, minqi, dlong

Summary: Added -DLINUX to the gcc command and improved the .sh script
Reviewed-by: dcubed, dholmes, minqi

Summary: Added (sig < MAXSIGNUM) check in jsig.c
Reviewed-by: dholmes, acorn

Summary: Added a new test_env.txt file to capture common shell variable. Added concept of COMPILEJAVA for use when TESTJAVA is a JRE. If COMPILEJAVA not set then TESTJAVA will be the default with assumption it is a JDK.
Reviewed-by: kvn, brutisso, coleenp

7107135: Stack guard pages are no more protected after loading a shared library with executable stack
Summary: Detect the execstack attribute of the loaded library and attempt to fix the stack guard using Safepoint op.
Reviewed-by: dholmes, zgu
Contributed-by: ioi.lam@oracle.com