src/hotspot/os/linux/os_linux.cpp

rev 47287 : Port 09.17.Thread_SMR_logging_update from JDK9 to JDK10
rev 47289 : eosterlund, stefank CR - refactor code into threadSMR.cpp and threadSMR.hpp
rev 47292 : stefank, coleenp CR - refactor most JavaThreadIterator usage to use JavaThreadIteratorWithHandle.

*** 1833,1845 ****
    //
    // Need to check _stack_is_executable again as multiple VM_LinuxDllLoad
    // may have been queued at the same time.
  
    if (!_stack_is_executable) {
!     ThreadsListHandle tlh;
!     JavaThreadIterator jti(tlh.list());
!     for (JavaThread *jt = jti.first(); jt != NULL; jt = jti.next()) {
        if (!jt->stack_guard_zone_unused() &&     // Stack not yet fully initialized
            jt->stack_guards_enabled()) {         // No pending stack overflow exceptions
          if (!os::guard_memory((char *)jt->stack_end(), jt->stack_guard_zone_size())) {
            warning("Attempt to reguard stack yellow zone failed.");
          }
--- 1833,1843 ----
    //
    // Need to check _stack_is_executable again as multiple VM_LinuxDllLoad
    // may have been queued at the same time.
  
    if (!_stack_is_executable) {
!     for (JavaThreadIteratorWithHandle jtiwh; JavaThread *jt = jtiwh.next(); ) {
        if (!jt->stack_guard_zone_unused() &&     // Stack not yet fully initialized
            jt->stack_guards_enabled()) {         // No pending stack overflow exceptions
          if (!os::guard_memory((char *)jt->stack_end(), jt->stack_guard_zone_size())) {
            warning("Attempt to reguard stack yellow zone failed.");
          }