src/cpu/aarch64/vm/c1_MacroAssembler_aarch64.hpp

rev 12409 : 8169177: aarch64: SIGSEGV when "-XX:+ZeroTLAB" is specified along with GC options
Summary: Add zero-initialization to C1 for fast TLAB refills
Reviewed-by: aph, drwhite
Contributed-by: kavitha.natarajan@linaro.org

*** 34,44 ****
   private:
    int _rsp_offset;    // track rsp changes
    // initialization
    void pd_init() { _rsp_offset = 0; }
  
- void zero_memory(Register addr, Register len, Register t1);
  
   public:
    void try_allocate(
      Register obj,                      // result: pointer to object after successful allocation
      Register var_size_in_bytes,        // object size in bytes if unknown at compile time; invalid otherwise
--- 34,43 ----
*** 73,83 ****
      Register obj,                      // result: pointer to object after successful allocation
      Register klass,                    // object klass
      Register var_size_in_bytes,        // object size in bytes if unknown at compile time; invalid otherwise
      int      con_size_in_bytes,        // object size in bytes if   known at compile time
      Register t1,                       // temp register
!     Register t2                        // temp register
    );
  
    // allocation of fixed-size objects
    // (can also be used to allocate fixed-size arrays, by setting
    // hdr_size correctly and storing the array length afterwards)
--- 72,83 ----
      Register obj,                      // result: pointer to object after successful allocation
      Register klass,                    // object klass
      Register var_size_in_bytes,        // object size in bytes if unknown at compile time; invalid otherwise
      int      con_size_in_bytes,        // object size in bytes if   known at compile time
      Register t1,                       // temp register
!     Register t2,                        // temp register
!     bool     is_tlab_allocated         // the object was allocated in a TLAB; relevant for the implementation of ZeroTLAB
    );
  
    // allocation of fixed-size objects
    // (can also be used to allocate fixed-size arrays, by setting
    // hdr_size correctly and storing the array length afterwards)