never@1445: /*
mikael@6198:  * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
twisti@1814:  * Copyright 2007, 2008, 2010 Red Hat, Inc.
never@1445:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
never@1445:  *
never@1445:  * This code is free software; you can redistribute it and/or modify it
never@1445:  * under the terms of the GNU General Public License version 2 only, as
never@1445:  * published by the Free Software Foundation.
never@1445:  *
never@1445:  * This code is distributed in the hope that it will be useful, but WITHOUT
never@1445:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
never@1445:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
never@1445:  * version 2 for more details (a copy is included in the LICENSE file that
never@1445:  * accompanied this code).
never@1445:  *
never@1445:  * You should have received a copy of the GNU General Public License version
never@1445:  * 2 along with this work; if not, write to the Free Software Foundation,
never@1445:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
never@1445:  *
trims@1907:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907:  * or visit www.oracle.com if you need additional information or have any
trims@1907:  * questions.
never@1445:  *
never@1445:  */
never@1445: 
stefank@2314: #include "precompiled.hpp"
stefank@2314: #include "asm/assembler.hpp"
stefank@2314: #include "assembler_zero.inline.hpp"
stefank@2314: #include "interpreter/interpreter.hpp"
stefank@2314: #include "nativeInst_zero.hpp"
stefank@2314: #include "oops/instanceOop.hpp"
coleenp@4037: #include "oops/method.hpp"
stefank@2314: #include "oops/objArrayKlass.hpp"
stefank@2314: #include "oops/oop.inline.hpp"
stefank@2314: #include "prims/methodHandles.hpp"
stefank@2314: #include "runtime/frame.inline.hpp"
stefank@2314: #include "runtime/handles.inline.hpp"
stefank@2314: #include "runtime/sharedRuntime.hpp"
stefank@2314: #include "runtime/stubCodeGenerator.hpp"
stefank@2314: #include "runtime/stubRoutines.hpp"
stefank@4299: #include "runtime/thread.inline.hpp"
stefank@2314: #include "stack_zero.inline.hpp"
stefank@2314: #include "utilities/top.hpp"
stefank@2314: #ifdef COMPILER2
stefank@2314: #include "opto/runtime.hpp"
stefank@2314: #endif
never@1445: 
never@1445: // Declaration and definition of StubGenerator (no .hpp file).
never@1445: // For a more detailed description of the stub routine structure
never@1445: // see the comment in stubRoutines.hpp
never@1445: 
never@1445: class StubGenerator: public StubCodeGenerator {
never@1445:  private:
never@1445:   // The call stub is used to call Java from C
never@1445:   static void call_stub(
never@1445:     JavaCallWrapper *call_wrapper,
never@1445:     intptr_t*        result,
never@1445:     BasicType        result_type,
coleenp@4037:     Method*          method,
never@1445:     address          entry_point,
never@1445:     intptr_t*        parameters,
never@1445:     int              parameter_words,
never@1445:     TRAPS) {
never@1445:     JavaThread *thread = (JavaThread *) THREAD;
never@1445:     ZeroStack *stack = thread->zero_stack();
never@1445: 
never@1445:     // Make sure we have no pending exceptions
never@1445:     assert(!HAS_PENDING_EXCEPTION, "call_stub called with pending exception");
never@1445: 
never@1445:     // Set up the stack if necessary
never@1445:     bool stack_needs_teardown = false;
never@1445:     if (stack->needs_setup()) {
twisti@1866:       size_t zero_stack_size = stack->suggest_size(thread);
never@1445:       stack->setup(alloca(zero_stack_size), zero_stack_size);
never@1445:       stack_needs_teardown = true;
never@1445:     }
never@1445: 
never@1445:     // Allocate and initialize our frame
twisti@1814:     EntryFrame *frame =
twisti@1814:       EntryFrame::build(parameters, parameter_words, call_wrapper, THREAD);
never@1445: 
twisti@1814:     if (!HAS_PENDING_EXCEPTION) {
twisti@1814:       // Push the frame
twisti@1814:       thread->push_zero_frame(frame);
never@1445: 
twisti@1814:       // Make the call
twisti@1814:       Interpreter::invoke_method(method, entry_point, THREAD);
twisti@1814: 
twisti@1814:       // Store the result
twisti@1814:       if (!HAS_PENDING_EXCEPTION) {
twisti@1814:         switch (result_type) {
twisti@1814:         case T_INT:
twisti@1814:           *(jint *) result = *(jint *) stack->sp();
twisti@1814:           break;
twisti@1814:         case T_LONG:
twisti@1814:           *(jlong *) result = *(jlong *) stack->sp();
twisti@1814:           break;
twisti@1814:         case T_FLOAT:
twisti@1814:           *(jfloat *) result = *(jfloat *) stack->sp();
twisti@1814:           break;
twisti@1814:         case T_DOUBLE:
twisti@1814:           *(jdouble *) result = *(jdouble *) stack->sp();
twisti@1814:           break;
twisti@1814:         case T_OBJECT:
twisti@1814:           *(oop *) result = *(oop *) stack->sp();
twisti@1814:           break;
twisti@1814:         default:
twisti@1814:           ShouldNotReachHere();
twisti@1814:         }
never@1445:       }
twisti@1814: 
twisti@1814:       // Unwind the frame
twisti@1814:       thread->pop_zero_frame();
never@1445:     }
never@1445: 
never@1445:     // Tear down the stack if necessary
never@1445:     if (stack_needs_teardown)
never@1445:       stack->teardown();
never@1445:   }
never@1445: 
never@1445:   // These stubs get called from some dumb test routine.
never@1445:   // I'll write them properly when they're called from
never@1445:   // something that's actually doing something.
never@1445:   static void fake_arraycopy_stub(address src, address dst, int count) {
never@1445:     assert(count == 0, "huh?");
never@1445:   }
never@1445: 
never@1445:   void generate_arraycopy_stubs() {
never@1445:     // Call the conjoint generation methods immediately after
never@1445:     // the disjoint ones so that short branches from the former
never@1445:     // to the latter can be generated.
never@1445:     StubRoutines::_jbyte_disjoint_arraycopy  = (address) fake_arraycopy_stub;
never@1445:     StubRoutines::_jbyte_arraycopy           = (address) fake_arraycopy_stub;
never@1445: 
never@1445:     StubRoutines::_jshort_disjoint_arraycopy = (address) fake_arraycopy_stub;
never@1445:     StubRoutines::_jshort_arraycopy          = (address) fake_arraycopy_stub;
never@1445: 
never@1445:     StubRoutines::_jint_disjoint_arraycopy   = (address) fake_arraycopy_stub;
never@1445:     StubRoutines::_jint_arraycopy            = (address) fake_arraycopy_stub;
never@1445: 
never@1445:     StubRoutines::_jlong_disjoint_arraycopy  = (address) fake_arraycopy_stub;
never@1445:     StubRoutines::_jlong_arraycopy           = (address) fake_arraycopy_stub;
never@1445: 
never@1445:     StubRoutines::_oop_disjoint_arraycopy    = ShouldNotCallThisStub();
never@1445:     StubRoutines::_oop_arraycopy             = ShouldNotCallThisStub();
never@1445: 
never@1445:     StubRoutines::_checkcast_arraycopy       = ShouldNotCallThisStub();
never@1445:     StubRoutines::_unsafe_arraycopy          = ShouldNotCallThisStub();
never@1445:     StubRoutines::_generic_arraycopy         = ShouldNotCallThisStub();
never@1445: 
never@1445:     // We don't generate specialized code for HeapWord-aligned source
never@1445:     // arrays, so just use the code we've already generated
never@1445:     StubRoutines::_arrayof_jbyte_disjoint_arraycopy =
never@1445:       StubRoutines::_jbyte_disjoint_arraycopy;
never@1445:     StubRoutines::_arrayof_jbyte_arraycopy =
never@1445:       StubRoutines::_jbyte_arraycopy;
never@1445: 
never@1445:     StubRoutines::_arrayof_jshort_disjoint_arraycopy =
never@1445:       StubRoutines::_jshort_disjoint_arraycopy;
never@1445:     StubRoutines::_arrayof_jshort_arraycopy =
never@1445:       StubRoutines::_jshort_arraycopy;
never@1445: 
never@1445:     StubRoutines::_arrayof_jint_disjoint_arraycopy =
never@1445:       StubRoutines::_jint_disjoint_arraycopy;
never@1445:     StubRoutines::_arrayof_jint_arraycopy =
never@1445:       StubRoutines::_jint_arraycopy;
never@1445: 
never@1445:     StubRoutines::_arrayof_jlong_disjoint_arraycopy =
never@1445:       StubRoutines::_jlong_disjoint_arraycopy;
never@1445:     StubRoutines::_arrayof_jlong_arraycopy =
never@1445:       StubRoutines::_jlong_arraycopy;
never@1445: 
never@1445:     StubRoutines::_arrayof_oop_disjoint_arraycopy =
never@1445:       StubRoutines::_oop_disjoint_arraycopy;
never@1445:     StubRoutines::_arrayof_oop_arraycopy =
never@1445:       StubRoutines::_oop_arraycopy;
never@1445:   }
never@1445: 
omajid@5497:   static int SafeFetch32(int *adr, int errValue) {
omajid@5497:     int value = errValue;
omajid@5497:     value = *adr;
omajid@5497:     return value;
omajid@5497:   }
omajid@5497: 
omajid@5497:   static intptr_t SafeFetchN(intptr_t *adr, intptr_t errValue) {
omajid@5497:     intptr_t value = errValue;
omajid@5497:     value = *adr;
omajid@5497:     return value;
omajid@5497:   }
omajid@5497: 
omajid@5497: 
never@1445:   void generate_initial() {
never@1445:     // Generates all stubs and initializes the entry points
never@1445: 
never@1445:     // entry points that exist in all platforms Note: This is code
never@1445:     // that could be shared among different platforms - however the
never@1445:     // benefit seems to be smaller than the disadvantage of having a
never@1445:     // much more complicated generator structure. See also comment in
never@1445:     // stubRoutines.hpp.
never@1445: 
never@1445:     StubRoutines::_forward_exception_entry   = ShouldNotCallThisStub();
never@1445:     StubRoutines::_call_stub_entry           = (address) call_stub;
never@1445:     StubRoutines::_catch_exception_entry     = ShouldNotCallThisStub();
never@1445: 
never@1445:     // atomic calls
never@1445:     StubRoutines::_atomic_xchg_entry         = ShouldNotCallThisStub();
never@1445:     StubRoutines::_atomic_xchg_ptr_entry     = ShouldNotCallThisStub();
never@1445:     StubRoutines::_atomic_cmpxchg_entry      = ShouldNotCallThisStub();
never@1445:     StubRoutines::_atomic_cmpxchg_ptr_entry  = ShouldNotCallThisStub();
never@1445:     StubRoutines::_atomic_cmpxchg_long_entry = ShouldNotCallThisStub();
never@1445:     StubRoutines::_atomic_add_entry          = ShouldNotCallThisStub();
never@1445:     StubRoutines::_atomic_add_ptr_entry      = ShouldNotCallThisStub();
never@1445:     StubRoutines::_fence_entry               = ShouldNotCallThisStub();
never@1445: 
never@1445:     // amd64 does this here, sparc does it in generate_all()
never@1445:     StubRoutines::_handler_for_unsafe_access_entry =
never@1445:       ShouldNotCallThisStub();
never@1445:   }
never@1445: 
never@1445:   void generate_all() {
never@1445:     // Generates all stubs and initializes the entry points
never@1445: 
never@1445:     // These entry points require SharedInfo::stack0 to be set up in
never@1445:     // non-core builds and need to be relocatable, so they each
never@1445:     // fabricate a RuntimeStub internally.
never@1445:     StubRoutines::_throw_AbstractMethodError_entry =
never@1445:       ShouldNotCallThisStub();
never@1445: 
never@1445:     StubRoutines::_throw_NullPointerException_at_call_entry =
never@1445:       ShouldNotCallThisStub();
never@1445: 
never@1445:     StubRoutines::_throw_StackOverflowError_entry =
never@1445:       ShouldNotCallThisStub();
never@1445: 
never@1445:     // support for verify_oop (must happen after universe_init)
never@1445:     StubRoutines::_verify_oop_subroutine_entry =
never@1445:       ShouldNotCallThisStub();
never@1445: 
never@1445:     // arraycopy stubs used by compilers
never@1445:     generate_arraycopy_stubs();
omajid@5497: 
omajid@5497:     // Safefetch stubs.
omajid@5497:     StubRoutines::_safefetch32_entry = CAST_FROM_FN_PTR(address, StubGenerator::SafeFetch32);
omajid@5497:     StubRoutines::_safefetch32_fault_pc = NULL;
omajid@5497:     StubRoutines::_safefetch32_continuation_pc = NULL;
omajid@5497: 
omajid@5497:     StubRoutines::_safefetchN_entry = CAST_FROM_FN_PTR(address, StubGenerator::SafeFetchN);
omajid@5497:     StubRoutines::_safefetchN_fault_pc = NULL;
omajid@5497:     StubRoutines::_safefetchN_continuation_pc = NULL;
never@1445:   }
never@1445: 
never@1445:  public:
never@1445:   StubGenerator(CodeBuffer* code, bool all) : StubCodeGenerator(code) {
never@1445:     if (all) {
never@1445:       generate_all();
never@1445:     } else {
never@1445:       generate_initial();
never@1445:     }
never@1445:   }
never@1445: };
never@1445: 
never@1445: void StubGenerator_generate(CodeBuffer* code, bool all) {
never@1445:   StubGenerator g(code, all);
never@1445: }
never@1445: 
twisti@1814: EntryFrame *EntryFrame::build(const intptr_t*  parameters,
never@1445:                               int              parameter_words,
twisti@1814:                               JavaCallWrapper* call_wrapper,
twisti@1814:                               TRAPS) {
twisti@1814: 
twisti@1814:   ZeroStack *stack = ((JavaThread *) THREAD)->zero_stack();
twisti@1814:   stack->overflow_check(header_words + parameter_words, CHECK_NULL);
never@1445: 
never@1445:   stack->push(0); // next_frame, filled in later
never@1445:   intptr_t *fp = stack->sp();
never@1445:   assert(fp - stack->sp() == next_frame_off, "should be");
never@1445: 
never@1445:   stack->push(ENTRY_FRAME);
never@1445:   assert(fp - stack->sp() == frame_type_off, "should be");
never@1445: 
never@1445:   stack->push((intptr_t) call_wrapper);
never@1445:   assert(fp - stack->sp() == call_wrapper_off, "should be");
never@1445: 
never@1445:   for (int i = 0; i < parameter_words; i++)
never@1445:     stack->push(parameters[i]);
never@1445: 
never@1445:   return (EntryFrame *) fp;
never@1445: }