180   return -18;
181 #endif
182 }
183 
184 static NativeNMethodCmpBarrier* native_nmethod_barrier(nmethod* nm) {
185   address barrier_address;
186 #if INCLUDE_JVMCI
187   if (nm->is_compiled_by_jvmci()) {
188     barrier_address = nm->code_begin() + nm->jvmci_nmethod_data()->nmethod_entry_patch_offset();
189   } else
190 #endif
191     {
192       barrier_address = nm->code_begin() + nm->frame_complete_offset() + entry_barrier_offset(nm);
193     }
194 
195   NativeNMethodCmpBarrier* barrier = reinterpret_cast<NativeNMethodCmpBarrier*>(barrier_address);
196   barrier->verify();
197   return barrier;
198 }
199 

























200 void BarrierSetNMethod::set_guard_value(nmethod* nm, int value) {
201   if (!supports_entry_barrier(nm)) {
202     return;
203   }
204 
205   NativeNMethodCmpBarrier* cmp = native_nmethod_barrier(nm);
206   cmp->set_immediate(value);
207 }
208 
209 int BarrierSetNMethod::guard_value(nmethod* nm) {
210   if (!supports_entry_barrier(nm)) {
211     return disarmed_guard_value();
212   }
213 
214   NativeNMethodCmpBarrier* cmp = native_nmethod_barrier(nm);
215   return cmp->get_immediate();
216 }
217 
218 
219 #if INCLUDE_JVMCI
220 bool BarrierSetNMethod::verify_barrier(nmethod* nm, err_msg& msg) {
221   NativeNMethodCmpBarrier* barrier = native_nmethod_barrier(nm);
222   return barrier->check_barrier(msg);
223 }
224 #endif

180   return -18;
181 #endif
182 }
183 
184 static NativeNMethodCmpBarrier* native_nmethod_barrier(nmethod* nm) {
185   address barrier_address;
186 #if INCLUDE_JVMCI
187   if (nm->is_compiled_by_jvmci()) {
188     barrier_address = nm->code_begin() + nm->jvmci_nmethod_data()->nmethod_entry_patch_offset();
189   } else
190 #endif
191     {
192       barrier_address = nm->code_begin() + nm->frame_complete_offset() + entry_barrier_offset(nm);
193     }
194 
195   NativeNMethodCmpBarrier* barrier = reinterpret_cast<NativeNMethodCmpBarrier*>(barrier_address);
196   barrier->verify();
197   return barrier;
198 }
199 
200 static void set_immediate(nmethod* nm, jint val) {
201   NativeNMethodCmpBarrier* cmp1 = native_nmethod_barrier(nm);
202   cmp1->set_immediate(val);
203 
204   if (!nm->is_osr_method() && nm->method()->has_scalarized_args()) {
205     // nmethods with scalarized arguments have multiple entry points that each have an own nmethod entry barrier
206     assert(nm->verified_entry_point() != nm->verified_inline_entry_point(), "scalarized entry point not found");
207     address method_body = nm->is_compiled_by_c1() ? nm->verified_inline_entry_point() : nm->verified_entry_point();
208     address entry_point2 = nm->is_compiled_by_c1() ? nm->verified_entry_point() : nm->verified_inline_entry_point();
209 
210     int barrier_offset = reinterpret_cast<address>(cmp1) - method_body;
211     NativeNMethodCmpBarrier* cmp2 = reinterpret_cast<NativeNMethodCmpBarrier*>(entry_point2 + barrier_offset);
212     assert(cmp1 != cmp2, "sanity");
213     debug_only(cmp2->verify());
214     cmp2->set_immediate(val);
215 
216     if (method_body != nm->verified_inline_ro_entry_point() && entry_point2 != nm->verified_inline_ro_entry_point()) {
217       NativeNMethodCmpBarrier* cmp3 = reinterpret_cast<NativeNMethodCmpBarrier*>(nm->verified_inline_ro_entry_point() + barrier_offset);
218       assert(cmp1 != cmp3 && cmp2 != cmp3, "sanity");
219       debug_only(cmp3->verify());
220       cmp3->set_immediate(val);
221     }
222   }
223 }
224 
225 void BarrierSetNMethod::set_guard_value(nmethod* nm, int value) {
226   if (!supports_entry_barrier(nm)) {
227     return;
228   }
229 
230   set_immediate(nm, value);

231 }
232 
233 int BarrierSetNMethod::guard_value(nmethod* nm) {
234   if (!supports_entry_barrier(nm)) {
235     return disarmed_guard_value();
236   }
237 
238   NativeNMethodCmpBarrier* cmp = native_nmethod_barrier(nm);
239   return cmp->get_immediate();
240 }
241 
242 
243 #if INCLUDE_JVMCI
244 bool BarrierSetNMethod::verify_barrier(nmethod* nm, err_msg& msg) {
245   NativeNMethodCmpBarrier* barrier = native_nmethod_barrier(nm);
246   return barrier->check_barrier(msg);
247 }
248 #endif