--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/cpu/zero/stubGenerator_zero.cpp Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,335 @@
+/*
+ * 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;
+}