| /* |
| * Copyright (c) 2003, 2016, Oracle and/or its affiliates. All rights reserved. |
| * Copyright 2007, 2008, 2010, 2015 Red Hat, Inc. |
| * 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. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #include "precompiled.hpp" |
| #include "asm/assembler.hpp" |
| #include "assembler_zero.inline.hpp" |
| #include "interpreter/interpreter.hpp" |
| #include "nativeInst_zero.hpp" |
| #include "oops/instanceOop.hpp" |
| #include "oops/method.hpp" |
| #include "oops/objArrayKlass.hpp" |
| #include "oops/oop.inline.hpp" |
| #include "prims/methodHandles.hpp" |
| #include "runtime/frame.inline.hpp" |
| #include "runtime/handles.inline.hpp" |
| #include "runtime/sharedRuntime.hpp" |
| #include "runtime/stubCodeGenerator.hpp" |
| #include "runtime/stubRoutines.hpp" |
| #include "runtime/thread.inline.hpp" |
| #include "stack_zero.inline.hpp" |
| #ifdef COMPILER2 |
| #include "opto/runtime.hpp" |
| #endif |
| |
| // For SafeFetch we need POSIX tls and setjmp |
| #include <setjmp.h> |
| #include <pthread.h> |
| static pthread_key_t g_jmpbuf_key; |
| |
| // return the currently active jump buffer for this thread |
| // - if there is any, NULL otherwise. Called from |
| // zero signal handlers. |
| extern sigjmp_buf* get_jmp_buf_for_continuation() { |
| return (sigjmp_buf*) pthread_getspecific(g_jmpbuf_key); |
| } |
| |
| // Declaration and definition of StubGenerator (no .hpp file). |
| // For a more detailed description of the stub routine structure |
| // see the comment in stubRoutines.hpp |
| |
| class StubGenerator: public StubCodeGenerator { |
| private: |
| // The call stub is used to call Java from C |
| static void call_stub( |
| JavaCallWrapper *call_wrapper, |
| intptr_t* result, |
| BasicType result_type, |
| Method* method, |
| address entry_point, |
| intptr_t* parameters, |
| int parameter_words, |
| TRAPS) { |
| JavaThread *thread = (JavaThread *) THREAD; |
| ZeroStack *stack = thread->zero_stack(); |
| |
| // Make sure we have no pending exceptions |
| assert(!HAS_PENDING_EXCEPTION, "call_stub called with pending exception"); |
| |
| // Set up the stack if necessary |
| bool stack_needs_teardown = false; |
| if (stack->needs_setup()) { |
| size_t zero_stack_size = stack->suggest_size(thread); |
| stack->setup(alloca(zero_stack_size), zero_stack_size); |
| stack_needs_teardown = true; |
| } |
| |
| // Allocate and initialize our frame |
| EntryFrame *frame = |
| EntryFrame::build(parameters, parameter_words, call_wrapper, THREAD); |
| |
| if (!HAS_PENDING_EXCEPTION) { |
| // Push the frame |
| thread->push_zero_frame(frame); |
| |
| // Make the call |
| Interpreter::invoke_method(method, entry_point, THREAD); |
| |
| // Store the result |
| if (!HAS_PENDING_EXCEPTION) { |
| switch (result_type) { |
| case T_INT: |
| *(jint *) result = *(jint *) stack->sp(); |
| break; |
| case T_LONG: |
| *(jlong *) result = *(jlong *) stack->sp(); |
| break; |
| case T_FLOAT: |
| *(jfloat *) result = *(jfloat *) stack->sp(); |
| break; |
| case T_DOUBLE: |
| *(jdouble *) result = *(jdouble *) stack->sp(); |
| break; |
| case T_OBJECT: |
| *(oop *) result = *(oop *) stack->sp(); |
| break; |
| default: |
| ShouldNotReachHere(); |
| } |
| } |
| |
| // Unwind the frame |
| thread->pop_zero_frame(); |
| } |
| |
| // Tear down the stack if necessary |
| if (stack_needs_teardown) |
| stack->teardown(); |
| } |
| |
| // These stubs get called from some dumb test routine. |
| // I'll write them properly when they're called from |
| // something that's actually doing something. |
| static void fake_arraycopy_stub(address src, address dst, int count) { |
| assert(count == 0, "huh?"); |
| } |
| |
| void generate_arraycopy_stubs() { |
| // Call the conjoint generation methods immediately after |
| // the disjoint ones so that short branches from the former |
| // to the latter can be generated. |
| StubRoutines::_jbyte_disjoint_arraycopy = (address) fake_arraycopy_stub; |
| StubRoutines::_jbyte_arraycopy = (address) fake_arraycopy_stub; |
| |
| StubRoutines::_jshort_disjoint_arraycopy = (address) fake_arraycopy_stub; |
| StubRoutines::_jshort_arraycopy = (address) fake_arraycopy_stub; |
| |
| StubRoutines::_jint_disjoint_arraycopy = (address) fake_arraycopy_stub; |
| StubRoutines::_jint_arraycopy = (address) fake_arraycopy_stub; |
| |
| StubRoutines::_jlong_disjoint_arraycopy = (address) fake_arraycopy_stub; |
| StubRoutines::_jlong_arraycopy = (address) fake_arraycopy_stub; |
| |
| StubRoutines::_oop_disjoint_arraycopy = ShouldNotCallThisStub(); |
| StubRoutines::_oop_arraycopy = ShouldNotCallThisStub(); |
| |
| StubRoutines::_checkcast_arraycopy = ShouldNotCallThisStub(); |
| StubRoutines::_unsafe_arraycopy = ShouldNotCallThisStub(); |
| StubRoutines::_generic_arraycopy = ShouldNotCallThisStub(); |
| |
| // We don't generate specialized code for HeapWord-aligned source |
| // arrays, so just use the code we've already generated |
| StubRoutines::_arrayof_jbyte_disjoint_arraycopy = |
| StubRoutines::_jbyte_disjoint_arraycopy; |
| StubRoutines::_arrayof_jbyte_arraycopy = |
| StubRoutines::_jbyte_arraycopy; |
| |
| StubRoutines::_arrayof_jshort_disjoint_arraycopy = |
| StubRoutines::_jshort_disjoint_arraycopy; |
| StubRoutines::_arrayof_jshort_arraycopy = |
| StubRoutines::_jshort_arraycopy; |
| |
| StubRoutines::_arrayof_jint_disjoint_arraycopy = |
| StubRoutines::_jint_disjoint_arraycopy; |
| StubRoutines::_arrayof_jint_arraycopy = |
| StubRoutines::_jint_arraycopy; |
| |
| StubRoutines::_arrayof_jlong_disjoint_arraycopy = |
| StubRoutines::_jlong_disjoint_arraycopy; |
| StubRoutines::_arrayof_jlong_arraycopy = |
| StubRoutines::_jlong_arraycopy; |
| |
| StubRoutines::_arrayof_oop_disjoint_arraycopy = |
| StubRoutines::_oop_disjoint_arraycopy; |
| StubRoutines::_arrayof_oop_arraycopy = |
| StubRoutines::_oop_arraycopy; |
| } |
| |
| static int SafeFetch32(int *adr, int errValue) { |
| |
| // set up a jump buffer; anchor the pointer to the jump buffer in tls; then |
| // do the pointer access. If pointer is invalid, we crash; in signal |
| // handler, we retrieve pointer to jmp buffer from tls, and jump back. |
| // |
| // Note: the jump buffer itself - which can get pretty large depending on |
| // the architecture - lives on the stack and that is fine, because we will |
| // not rewind the stack: either we crash, in which case signal handler |
| // frame is below us, or we don't crash, in which case it does not matter. |
| sigjmp_buf jb; |
| if (sigsetjmp(jb, 1)) { |
| // we crashed. clean up tls and return default value. |
| pthread_setspecific(g_jmpbuf_key, NULL); |
| return errValue; |
| } else { |
| // preparation phase |
| pthread_setspecific(g_jmpbuf_key, &jb); |
| } |
| |
| int value = errValue; |
| value = *adr; |
| |
| // all went well. clean tls. |
| pthread_setspecific(g_jmpbuf_key, NULL); |
| |
| return value; |
| } |
| |
| static intptr_t SafeFetchN(intptr_t *adr, intptr_t errValue) { |
| |
| sigjmp_buf jb; |
| if (sigsetjmp(jb, 1)) { |
| // we crashed. clean up tls and return default value. |
| pthread_setspecific(g_jmpbuf_key, NULL); |
| return errValue; |
| } else { |
| // preparation phase |
| pthread_setspecific(g_jmpbuf_key, &jb); |
| } |
| |
| intptr_t value = errValue; |
| value = *adr; |
| |
| // all went well. clean tls. |
| pthread_setspecific(g_jmpbuf_key, NULL); |
| |
| return value; |
| |
| } |
| |
| void generate_initial() { |
| // Generates all stubs and initializes the entry points |
| |
| // entry points that exist in all platforms Note: This is code |
| // that could be shared among different platforms - however the |
| // benefit seems to be smaller than the disadvantage of having a |
| // much more complicated generator structure. See also comment in |
| // stubRoutines.hpp. |
| |
| StubRoutines::_forward_exception_entry = ShouldNotCallThisStub(); |
| StubRoutines::_call_stub_entry = (address) call_stub; |
| StubRoutines::_catch_exception_entry = ShouldNotCallThisStub(); |
| |
| // atomic calls |
| StubRoutines::_atomic_xchg_entry = ShouldNotCallThisStub(); |
| StubRoutines::_atomic_xchg_ptr_entry = ShouldNotCallThisStub(); |
| StubRoutines::_atomic_cmpxchg_entry = ShouldNotCallThisStub(); |
| StubRoutines::_atomic_cmpxchg_ptr_entry = ShouldNotCallThisStub(); |
| StubRoutines::_atomic_cmpxchg_byte_entry = ShouldNotCallThisStub(); |
| StubRoutines::_atomic_cmpxchg_long_entry = ShouldNotCallThisStub(); |
| StubRoutines::_atomic_add_entry = ShouldNotCallThisStub(); |
| StubRoutines::_atomic_add_ptr_entry = ShouldNotCallThisStub(); |
| StubRoutines::_fence_entry = ShouldNotCallThisStub(); |
| } |
| |
| void generate_all() { |
| // Generates all stubs and initializes the entry points |
| |
| // These entry points require SharedInfo::stack0 to be set up in |
| // non-core builds and need to be relocatable, so they each |
| // fabricate a RuntimeStub internally. |
| StubRoutines::_throw_AbstractMethodError_entry = |
| ShouldNotCallThisStub(); |
| |
| StubRoutines::_throw_NullPointerException_at_call_entry = |
| ShouldNotCallThisStub(); |
| |
| StubRoutines::_throw_StackOverflowError_entry = |
| ShouldNotCallThisStub(); |
| |
| // support for verify_oop (must happen after universe_init) |
| StubRoutines::_verify_oop_subroutine_entry = |
| ShouldNotCallThisStub(); |
| |
| // arraycopy stubs used by compilers |
| generate_arraycopy_stubs(); |
| |
| // Safefetch stubs. |
| pthread_key_create(&g_jmpbuf_key, NULL); |
| StubRoutines::_safefetch32_entry = CAST_FROM_FN_PTR(address, StubGenerator::SafeFetch32); |
| StubRoutines::_safefetch32_fault_pc = NULL; |
| StubRoutines::_safefetch32_continuation_pc = NULL; |
| |
| StubRoutines::_safefetchN_entry = CAST_FROM_FN_PTR(address, StubGenerator::SafeFetchN); |
| StubRoutines::_safefetchN_fault_pc = NULL; |
| StubRoutines::_safefetchN_continuation_pc = NULL; |
| } |
| |
| public: |
| StubGenerator(CodeBuffer* code, bool all) : StubCodeGenerator(code) { |
| if (all) { |
| generate_all(); |
| } else { |
| generate_initial(); |
| } |
| } |
| }; |
| |
| void StubGenerator_generate(CodeBuffer* code, bool all) { |
| StubGenerator g(code, all); |
| } |
| |
| EntryFrame *EntryFrame::build(const intptr_t* parameters, |
| int parameter_words, |
| JavaCallWrapper* call_wrapper, |
| TRAPS) { |
| |
| ZeroStack *stack = ((JavaThread *) THREAD)->zero_stack(); |
| stack->overflow_check(header_words + parameter_words, CHECK_NULL); |
| |
| stack->push(0); // next_frame, filled in later |
| intptr_t *fp = stack->sp(); |
| assert(fp - stack->sp() == next_frame_off, "should be"); |
| |
| stack->push(ENTRY_FRAME); |
| assert(fp - stack->sp() == frame_type_off, "should be"); |
| |
| stack->push((intptr_t) call_wrapper); |
| assert(fp - stack->sp() == call_wrapper_off, "should be"); |
| |
| for (int i = 0; i < parameter_words; i++) |
| stack->push(parameters[i]); |
| |
| return (EntryFrame *) fp; |
| } |