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src/hotspot/share/runtime/javaCalls.cpp

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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 #include "precompiled.hpp"
  26 #include "classfile/systemDictionary.hpp"
  27 #include "classfile/vmSymbols.hpp"
  28 #include "code/nmethod.hpp"
  29 #include "compiler/compileBroker.hpp"
  30 #include "interpreter/interpreter.hpp"
  31 #include "interpreter/linkResolver.hpp"
  32 #include "memory/universe.hpp"
  33 #include "oops/method.inline.hpp"
  34 #include "oops/oop.inline.hpp"

  35 #include "prims/jniCheck.hpp"
  36 #include "runtime/compilationPolicy.hpp"
  37 #include "runtime/handles.inline.hpp"
  38 #include "runtime/interfaceSupport.inline.hpp"
  39 #include "runtime/javaCalls.hpp"
  40 #include "runtime/jniHandles.inline.hpp"
  41 #include "runtime/mutexLocker.hpp"
  42 #include "runtime/os.inline.hpp"
  43 #include "runtime/sharedRuntime.hpp"
  44 #include "runtime/signature.hpp"
  45 #include "runtime/stubRoutines.hpp"
  46 #include "runtime/thread.inline.hpp"
  47 #if INCLUDE_JVMCI
  48 #include "jvmci/jvmciJavaClasses.hpp"
  49 #include "jvmci/jvmciRuntime.hpp"
  50 #endif
  51 
  52 // -----------------------------------------------------
  53 // Implementation of JavaCallWrapper
  54 


 141   // on sparc/ia64 which will catch violations of the reseting of last_Java_frame
 142   // invariants (i.e. _flags always cleared on return to Java)
 143 
 144   _thread->frame_anchor()->copy(&_anchor);
 145 
 146   // Release handles after we are marked as being inside the VM again, since this
 147   // operation might block
 148   JNIHandleBlock::release_block(_old_handles, _thread);
 149 }
 150 
 151 
 152 void JavaCallWrapper::oops_do(OopClosure* f) {
 153   f->do_oop((oop*)&_receiver);
 154   handles()->oops_do(f);
 155 }
 156 
 157 
 158 // Helper methods
 159 static BasicType runtime_type_from(JavaValue* result) {
 160   switch (result->get_type()) {
 161     case T_BOOLEAN: // fall through
 162     case T_CHAR   : // fall through
 163     case T_SHORT  : // fall through
 164     case T_INT    : // fall through
 165 #ifndef _LP64
 166     case T_OBJECT : // fall through
 167     case T_ARRAY  : // fall through

 168 #endif
 169     case T_BYTE   : // fall through
 170     case T_VOID   : return T_INT;
 171     case T_LONG   : return T_LONG;
 172     case T_FLOAT  : return T_FLOAT;
 173     case T_DOUBLE : return T_DOUBLE;
 174 #ifdef _LP64
 175     case T_ARRAY  : // fall through
 176     case T_OBJECT:  return T_OBJECT;

 177 #endif
 178     default:
 179       ShouldNotReachHere();
 180       return T_ILLEGAL;
 181   }
 182 }
 183 
 184 // ============ Virtual calls ============
 185 
 186 void JavaCalls::call_virtual(JavaValue* result, Klass* spec_klass, Symbol* name, Symbol* signature, JavaCallArguments* args, TRAPS) {
 187   CallInfo callinfo;
 188   Handle receiver = args->receiver();
 189   Klass* recvrKlass = receiver.is_null() ? (Klass*)NULL : receiver->klass();
 190   LinkInfo link_info(spec_klass, name, signature);
 191   LinkResolver::resolve_virtual_call(
 192           callinfo, receiver, recvrKlass, link_info, true, CHECK);
 193   methodHandle method = callinfo.selected_method();
 194   assert(method.not_null(), "should have thrown exception");
 195 
 196   // Invoke the method


 380     // A klass might not be initialized since JavaCall's might be used during the executing of
 381     // the <clinit>. For example, a Thread.start might start executing on an object that is
 382     // not fully initialized! (bad Java programming style)
 383     assert(holder->is_linked(), "rewriting must have taken place");
 384   }
 385 #endif
 386 
 387   CompilationPolicy::compile_if_required(method, CHECK);
 388 
 389   // Since the call stub sets up like the interpreter we call the from_interpreted_entry
 390   // so we can go compiled via a i2c. Otherwise initial entry method will always
 391   // run interpreted.
 392   address entry_point = method->from_interpreted_entry();
 393   if (JvmtiExport::can_post_interpreter_events() && thread->is_interp_only_mode()) {
 394     entry_point = method->interpreter_entry();
 395   }
 396 
 397   // Figure out if the result value is an oop or not (Note: This is a different value
 398   // than result_type. result_type will be T_INT of oops. (it is about size)
 399   BasicType result_type = runtime_type_from(result);
 400   bool oop_result_flag = (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY);

 401 
 402   // NOTE: if we move the computation of the result_val_address inside
 403   // the call to call_stub, the optimizer produces wrong code.
 404   intptr_t* result_val_address = (intptr_t*)(result->get_value_addr());
 405 
 406   // Find receiver
 407   Handle receiver = (!method->is_static()) ? args->receiver() : Handle();
 408 
 409   // When we reenter Java, we need to reenable the reserved/yellow zone which
 410   // might already be disabled when we are in VM.
 411   if (!thread->stack_guards_enabled()) {
 412     thread->reguard_stack();
 413   }
 414 
 415   // Check that there are shadow pages available before changing thread state
 416   // to Java. Calculate current_stack_pointer here to make sure
 417   // stack_shadow_pages_available() and bang_stack_shadow_pages() use the same sp.
 418   address sp = os::current_stack_pointer();
 419   if (!os::stack_shadow_pages_available(THREAD, method, sp)) {
 420     // Throw stack overflow exception with preinitialized exception.


 600       // Verify the pointee.
 601       oop vv = resolve_indirect_oop(v, _value_state[_pos]);
 602       guarantee(oopDesc::is_oop_or_null(vv, true),
 603                 "Bad JNI oop argument %d: " PTR_FORMAT " -> " PTR_FORMAT,
 604                 _pos, v, p2i(vv));
 605     }
 606 
 607     check_value(true);          // Verify value state.
 608   }
 609 
 610   void do_bool()                       { check_int(T_BOOLEAN);       }
 611   void do_char()                       { check_int(T_CHAR);          }
 612   void do_float()                      { check_int(T_FLOAT);         }
 613   void do_double()                     { check_double(T_DOUBLE);     }
 614   void do_byte()                       { check_int(T_BYTE);          }
 615   void do_short()                      { check_int(T_SHORT);         }
 616   void do_int()                        { check_int(T_INT);           }
 617   void do_long()                       { check_long(T_LONG);         }
 618   void do_void()                       { check_return_type(T_VOID);  }
 619   void do_object(int begin, int end)   { check_obj(T_OBJECT);        }

 620   void do_array(int begin, int end)    { check_obj(T_OBJECT);        }
 621 };
 622 
 623 
 624 void JavaCallArguments::verify(const methodHandle& method, BasicType return_type) {
 625   guarantee(method->size_of_parameters() == size_of_parameters(), "wrong no. of arguments pushed");
 626 
 627   // Treat T_OBJECT and T_ARRAY as the same
 628   if (return_type == T_ARRAY) return_type = T_OBJECT;
 629 
 630   // Check that oop information is correct
 631   Symbol* signature = method->signature();
 632 
 633   SignatureChekker sc(signature,
 634                       return_type,
 635                       method->is_static(),
 636                       _value_state,
 637                       _value);
 638   sc.iterate_parameters();
 639   sc.check_doing_return(true);


  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 #include "precompiled.hpp"
  26 #include "classfile/systemDictionary.hpp"
  27 #include "classfile/vmSymbols.hpp"
  28 #include "code/nmethod.hpp"
  29 #include "compiler/compileBroker.hpp"
  30 #include "interpreter/interpreter.hpp"
  31 #include "interpreter/linkResolver.hpp"
  32 #include "memory/universe.hpp"
  33 #include "oops/method.inline.hpp"
  34 #include "oops/oop.inline.hpp"
  35 #include "oops/valueKlass.hpp"
  36 #include "prims/jniCheck.hpp"
  37 #include "runtime/compilationPolicy.hpp"
  38 #include "runtime/handles.inline.hpp"
  39 #include "runtime/interfaceSupport.inline.hpp"
  40 #include "runtime/javaCalls.hpp"
  41 #include "runtime/jniHandles.inline.hpp"
  42 #include "runtime/mutexLocker.hpp"
  43 #include "runtime/os.inline.hpp"
  44 #include "runtime/sharedRuntime.hpp"
  45 #include "runtime/signature.hpp"
  46 #include "runtime/stubRoutines.hpp"
  47 #include "runtime/thread.inline.hpp"
  48 #if INCLUDE_JVMCI
  49 #include "jvmci/jvmciJavaClasses.hpp"
  50 #include "jvmci/jvmciRuntime.hpp"
  51 #endif
  52 
  53 // -----------------------------------------------------
  54 // Implementation of JavaCallWrapper
  55 


 142   // on sparc/ia64 which will catch violations of the reseting of last_Java_frame
 143   // invariants (i.e. _flags always cleared on return to Java)
 144 
 145   _thread->frame_anchor()->copy(&_anchor);
 146 
 147   // Release handles after we are marked as being inside the VM again, since this
 148   // operation might block
 149   JNIHandleBlock::release_block(_old_handles, _thread);
 150 }
 151 
 152 
 153 void JavaCallWrapper::oops_do(OopClosure* f) {
 154   f->do_oop((oop*)&_receiver);
 155   handles()->oops_do(f);
 156 }
 157 
 158 
 159 // Helper methods
 160 static BasicType runtime_type_from(JavaValue* result) {
 161   switch (result->get_type()) {
 162     case T_BOOLEAN  : // fall through
 163     case T_CHAR     : // fall through
 164     case T_SHORT    : // fall through
 165     case T_INT      : // fall through
 166 #ifndef _LP64
 167     case T_OBJECT   : // fall through
 168     case T_ARRAY    : // fall through
 169     case T_VALUETYPE: // fall through
 170 #endif
 171     case T_BYTE     : // fall through
 172     case T_VOID     : return T_INT;
 173     case T_LONG     : return T_LONG;
 174     case T_FLOAT    : return T_FLOAT;
 175     case T_DOUBLE   : return T_DOUBLE;
 176 #ifdef _LP64
 177     case T_ARRAY    : // fall through
 178     case T_OBJECT   : return T_OBJECT;
 179     case T_VALUETYPE: return T_VALUETYPE;
 180 #endif
 181     default:
 182       ShouldNotReachHere();
 183       return T_ILLEGAL;
 184   }
 185 }
 186 
 187 // ============ Virtual calls ============
 188 
 189 void JavaCalls::call_virtual(JavaValue* result, Klass* spec_klass, Symbol* name, Symbol* signature, JavaCallArguments* args, TRAPS) {
 190   CallInfo callinfo;
 191   Handle receiver = args->receiver();
 192   Klass* recvrKlass = receiver.is_null() ? (Klass*)NULL : receiver->klass();
 193   LinkInfo link_info(spec_klass, name, signature);
 194   LinkResolver::resolve_virtual_call(
 195           callinfo, receiver, recvrKlass, link_info, true, CHECK);
 196   methodHandle method = callinfo.selected_method();
 197   assert(method.not_null(), "should have thrown exception");
 198 
 199   // Invoke the method


 383     // A klass might not be initialized since JavaCall's might be used during the executing of
 384     // the <clinit>. For example, a Thread.start might start executing on an object that is
 385     // not fully initialized! (bad Java programming style)
 386     assert(holder->is_linked(), "rewriting must have taken place");
 387   }
 388 #endif
 389 
 390   CompilationPolicy::compile_if_required(method, CHECK);
 391 
 392   // Since the call stub sets up like the interpreter we call the from_interpreted_entry
 393   // so we can go compiled via a i2c. Otherwise initial entry method will always
 394   // run interpreted.
 395   address entry_point = method->from_interpreted_entry();
 396   if (JvmtiExport::can_post_interpreter_events() && thread->is_interp_only_mode()) {
 397     entry_point = method->interpreter_entry();
 398   }
 399 
 400   // Figure out if the result value is an oop or not (Note: This is a different value
 401   // than result_type. result_type will be T_INT of oops. (it is about size)
 402   BasicType result_type = runtime_type_from(result);
 403   bool oop_result_flag = (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY
 404                           || result->get_type() == T_VALUETYPE);
 405 
 406   // NOTE: if we move the computation of the result_val_address inside
 407   // the call to call_stub, the optimizer produces wrong code.
 408   intptr_t* result_val_address = (intptr_t*)(result->get_value_addr());
 409 
 410   // Find receiver
 411   Handle receiver = (!method->is_static()) ? args->receiver() : Handle();
 412 
 413   // When we reenter Java, we need to reenable the reserved/yellow zone which
 414   // might already be disabled when we are in VM.
 415   if (!thread->stack_guards_enabled()) {
 416     thread->reguard_stack();
 417   }
 418 
 419   // Check that there are shadow pages available before changing thread state
 420   // to Java. Calculate current_stack_pointer here to make sure
 421   // stack_shadow_pages_available() and bang_stack_shadow_pages() use the same sp.
 422   address sp = os::current_stack_pointer();
 423   if (!os::stack_shadow_pages_available(THREAD, method, sp)) {
 424     // Throw stack overflow exception with preinitialized exception.


 604       // Verify the pointee.
 605       oop vv = resolve_indirect_oop(v, _value_state[_pos]);
 606       guarantee(oopDesc::is_oop_or_null(vv, true),
 607                 "Bad JNI oop argument %d: " PTR_FORMAT " -> " PTR_FORMAT,
 608                 _pos, v, p2i(vv));
 609     }
 610 
 611     check_value(true);          // Verify value state.
 612   }
 613 
 614   void do_bool()                       { check_int(T_BOOLEAN);       }
 615   void do_char()                       { check_int(T_CHAR);          }
 616   void do_float()                      { check_int(T_FLOAT);         }
 617   void do_double()                     { check_double(T_DOUBLE);     }
 618   void do_byte()                       { check_int(T_BYTE);          }
 619   void do_short()                      { check_int(T_SHORT);         }
 620   void do_int()                        { check_int(T_INT);           }
 621   void do_long()                       { check_long(T_LONG);         }
 622   void do_void()                       { check_return_type(T_VOID);  }
 623   void do_object(int begin, int end)   { check_obj(T_OBJECT);        }
 624   void do_valuetype(int begin, int end){ check_obj(T_VALUETYPE);     }
 625   void do_array(int begin, int end)    { check_obj(T_OBJECT);        }
 626 };
 627 
 628 
 629 void JavaCallArguments::verify(const methodHandle& method, BasicType return_type) {
 630   guarantee(method->size_of_parameters() == size_of_parameters(), "wrong no. of arguments pushed");
 631 
 632   // Treat T_OBJECT and T_ARRAY as the same
 633   if (return_type == T_ARRAY) return_type = T_OBJECT;
 634 
 635   // Check that oop information is correct
 636   Symbol* signature = method->signature();
 637 
 638   SignatureChekker sc(signature,
 639                       return_type,
 640                       method->is_static(),
 641                       _value_state,
 642                       _value);
 643   sc.iterate_parameters();
 644   sc.check_doing_return(true);
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