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src/hotspot/os_cpu/linux_sparc/thread_linux_sparc.hpp

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  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #ifndef OS_CPU_LINUX_SPARC_VM_THREAD_LINUX_SPARC_HPP
  26 #define OS_CPU_LINUX_SPARC_VM_THREAD_LINUX_SPARC_HPP
  27 
  28 private:
  29 
  30   void pd_initialize() {
  31     _anchor.clear();
  32     _base_of_stack_pointer        = NULL;
  33   }
  34 
  35   frame pd_last_frame() {
  36     assert(has_last_Java_frame(), "must have last_Java_sp() when suspended");
  37     assert(_anchor.walkable(), "thread has not dumped its register windows yet");
  38 
  39     assert(_anchor.last_Java_pc() != NULL, "Ack no pc!");
  40     return frame(last_Java_sp(), frame::unpatchable, _anchor.last_Java_pc());
  41   }
  42 
  43   // Sometimes the trap handler needs to record both PC and NPC.
  44   // This is a SPARC-specific companion to Thread::set_saved_exception_pc.
  45   address _saved_exception_npc;
  46 
  47   // In polling_page_safepoint_handler_blob(s) we have to tail call other
  48   // blobs without blowing any registers.  A tail call requires some
  49   // register to jump with and we can't blow any registers, so it must
  50   // be restored in the delay slot.  'restore' cannot be used as it
  51   // will chop the heads off of 64-bit %o registers in the 32-bit
  52   // build.  Instead we reload the registers using G2_thread and this
  53   // location.  Must be 64bits in the 32-bit LION build.
  54   jdouble _o_reg_temps[6];
  55 
  56   // a stack pointer older than any java frame stack pointer.  It is
  57   // used to validate stack pointers in frame::next_younger_sp (it
  58   // provides the upper bound in the range check).  This is necessary
  59   // on Solaris/SPARC since the ucontext passed to a signal handler is
  60   // sometimes corrupt and we need a way to check the extracted sp.
  61   intptr_t* _base_of_stack_pointer;




  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #ifndef OS_CPU_LINUX_SPARC_VM_THREAD_LINUX_SPARC_HPP
  26 #define OS_CPU_LINUX_SPARC_VM_THREAD_LINUX_SPARC_HPP
  27 
  28 private:
  29 
  30   void pd_initialize() {
  31     _anchor.clear();
  32     _base_of_stack_pointer        = NULL;
  33   }
  34 
  35   frame pd_last_frame();






  36 
  37   // Sometimes the trap handler needs to record both PC and NPC.
  38   // This is a SPARC-specific companion to Thread::set_saved_exception_pc.
  39   address _saved_exception_npc;
  40 
  41   // In polling_page_safepoint_handler_blob(s) we have to tail call other
  42   // blobs without blowing any registers.  A tail call requires some
  43   // register to jump with and we can't blow any registers, so it must
  44   // be restored in the delay slot.  'restore' cannot be used as it
  45   // will chop the heads off of 64-bit %o registers in the 32-bit
  46   // build.  Instead we reload the registers using G2_thread and this
  47   // location.  Must be 64bits in the 32-bit LION build.
  48   jdouble _o_reg_temps[6];
  49 
  50   // a stack pointer older than any java frame stack pointer.  It is
  51   // used to validate stack pointers in frame::next_younger_sp (it
  52   // provides the upper bound in the range check).  This is necessary
  53   // on Solaris/SPARC since the ucontext passed to a signal handler is
  54   // sometimes corrupt and we need a way to check the extracted sp.
  55   intptr_t* _base_of_stack_pointer;


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