src/hotspot/cpu/sparc/jniFastGetField_sparc.cpp

rev 55759 : 8227680: FastJNIAccessors: Check for JVMTI field access event requests at runtime
Summary: Check JvmtiExport::_field_access_count != 0 at runtime
Reviewed-by:

*** 1,7 ****
  /*
!  * Copyright (c) 2004, 2017, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.
--- 1,7 ----
  /*
!  * Copyright (c) 2004, 2019, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.
*** 68,77 ****
--- 68,86 ----
    Address cnt_addr(O3, cnt_addrlit.low10());
    __ ld (cnt_addr, G4);
    __ andcc (G4, 1, G0);
    __ br (Assembler::notZero, false, Assembler::pn, label1);
    __ delayed()->srl (O2, 2, O4);
+ 
+   if (JvmtiExport::can_post_field_access()) {
+     // Check to see if a field access watch has been set before we
+     // take the fast path.
+     AddressLiteral get_field_access_count_addr(JvmtiExport::get_field_access_count_addr());
+     __ load_contents(get_field_access_count_addr, O5);
+     __ cmp_and_br_short(O5, 0, Assembler::notEqual, Assembler::pn, label1);
+   }
+ 
    __ mov(O1, O5);
  
    // Both O5 and G3 are clobbered by try_resolve_jobject_in_native.
    BarrierSetAssembler *bs = BarrierSet::barrier_set()->barrier_set_assembler();
    bs->try_resolve_jobject_in_native(masm, /* jni_env */ O0, /* obj */ O5, /* tmp */ G3, label1);
*** 151,160 ****
--- 160,178 ----
    Address cnt_addr(G3, cnt_addrlit.low10());
    __ ld (cnt_addr, G4);
    __ andcc (G4, 1, G0);
    __ br (Assembler::notZero, false, Assembler::pn, label1);
    __ delayed()->srl (O2, 2, O4);
+ 
+   if (JvmtiExport::can_post_field_access()) {
+     // Check to see if a field access watch has been set before we
+     // take the fast path.
+     AddressLiteral get_field_access_count_addr(JvmtiExport::get_field_access_count_addr());
+     __ load_contents(get_field_access_count_addr, O5);
+     __ cmp_and_br_short(O5, 0, Assembler::notEqual, Assembler::pn, label1);
+   }
+ 
    __ mov(O1, O5);
  
    // Both O5 and G1 are clobbered by try_resolve_jobject_in_native.
    BarrierSetAssembler *bs = BarrierSet::barrier_set()->barrier_set_assembler();
    bs->try_resolve_jobject_in_native(masm, /* jni_env */ O0, /* obj */ O5, /* tmp */ G1, label1);
*** 209,218 ****
--- 227,245 ----
    Address cnt_addr(O3, cnt_addrlit.low10());
    __ ld (cnt_addr, G4);
    __ andcc (G4, 1, G0);
    __ br (Assembler::notZero, false, Assembler::pn, label1);
    __ delayed()->srl (O2, 2, O4);
+ 
+   if (JvmtiExport::can_post_field_access()) {
+     // Check to see if a field access watch has been set before we
+     // take the fast path.
+     AddressLiteral get_field_access_count_addr(JvmtiExport::get_field_access_count_addr());
+     __ load_contents(get_field_access_count_addr, O5);
+     __ cmp_and_br_short(O5, 0, Assembler::notEqual, Assembler::pn, label1);
+   }
+ 
    __ mov(O1, O5);
  
    // Both O5 and G3 are clobbered by try_resolve_jobject_in_native.
    BarrierSetAssembler *bs = BarrierSet::barrier_set()->barrier_set_assembler();
    bs->try_resolve_jobject_in_native(masm, /* jni_env */ O0, /* obj */ O5, /* tmp */ G3, label1);