Summary: the tmp reg used to break the shuffling cycle (handled in ComputeMoveOrder) is set to 64 bit.
Reviewed-by: andrew

Summary: Add hotspot/test/runtime/jni directory with two tests for 8176100
Reviewed-by: kbarrett, coleenp, tschatzl

Summary: If java test return none zero, the value will be override by 'if' statement, the exit value will always '0' and pass. Fix by recording the result in a variable.
Reviewed-by: coleenp, dholmes, iklam
Contributed-by: yumin.qi@oracle.com

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

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