1 /*
2 * Copyright (c) 2003, 2012, Oracle and/or its affiliates. All rights reserved.
3 * Copyright 2007, 2008, 2010 Red Hat, Inc.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26 #include "precompiled.hpp"
27 #include "asm/assembler.hpp"
28 #include "assembler_zero.inline.hpp"
29 #include "interpreter/interpreter.hpp"
30 #include "nativeInst_zero.hpp"
31 #include "oops/instanceOop.hpp"
32 #include "oops/method.hpp"
33 #include "oops/objArrayKlass.hpp"
34 #include "oops/oop.inline.hpp"
35 #include "prims/methodHandles.hpp"
36 #include "runtime/frame.inline.hpp"
37 #include "runtime/handles.inline.hpp"
38 #include "runtime/sharedRuntime.hpp"
39 #include "runtime/stubCodeGenerator.hpp"
40 #include "runtime/stubRoutines.hpp"
41 #include "runtime/thread.inline.hpp"
42 #include "stack_zero.inline.hpp"
43 #include "utilities/top.hpp"
44 #ifdef COMPILER2
45 #include "opto/runtime.hpp"
46 #endif
47
48 // Declaration and definition of StubGenerator (no .hpp file).
49 // For a more detailed description of the stub routine structure
50 // see the comment in stubRoutines.hpp
51
52 class StubGenerator: public StubCodeGenerator {
53 private:
54 // The call stub is used to call Java from C
55 static void call_stub(
56 JavaCallWrapper *call_wrapper,
57 intptr_t* result,
58 BasicType result_type,
59 Method* method,
60 address entry_point,
61 intptr_t* parameters,
62 int parameter_words,
63 TRAPS) {
64 JavaThread *thread = (JavaThread *) THREAD;
65 ZeroStack *stack = thread->zero_stack();
66
67 // Make sure we have no pending exceptions
68 assert(!HAS_PENDING_EXCEPTION, "call_stub called with pending exception");
69
70 // Set up the stack if necessary
71 bool stack_needs_teardown = false;
72 if (stack->needs_setup()) {
73 size_t zero_stack_size = stack->suggest_size(thread);
74 stack->setup(alloca(zero_stack_size), zero_stack_size);
75 stack_needs_teardown = true;
76 }
77
78 // Allocate and initialize our frame
79 EntryFrame *frame =
80 EntryFrame::build(parameters, parameter_words, call_wrapper, THREAD);
81
82 if (!HAS_PENDING_EXCEPTION) {
83 // Push the frame
84 thread->push_zero_frame(frame);
85
86 // Make the call
87 Interpreter::invoke_method(method, entry_point, THREAD);
88
89 // Store the result
90 if (!HAS_PENDING_EXCEPTION) {
91 switch (result_type) {
92 case T_INT:
93 *(jint *) result = *(jint *) stack->sp();
94 break;
95 case T_LONG:
96 *(jlong *) result = *(jlong *) stack->sp();
97 break;
98 case T_FLOAT:
99 *(jfloat *) result = *(jfloat *) stack->sp();
100 break;
101 case T_DOUBLE:
102 *(jdouble *) result = *(jdouble *) stack->sp();
103 break;
104 case T_OBJECT:
105 *(oop *) result = *(oop *) stack->sp();
106 break;
107 default:
108 ShouldNotReachHere();
109 }
110 }
111
112 // Unwind the frame
113 thread->pop_zero_frame();
114 }
115
116 // Tear down the stack if necessary
117 if (stack_needs_teardown)
118 stack->teardown();
119 }
120
121 // These stubs get called from some dumb test routine.
122 // I'll write them properly when they're called from
123 // something that's actually doing something.
124 static void fake_arraycopy_stub(address src, address dst, int count) {
125 assert(count == 0, "huh?");
126 }
127
128 void generate_arraycopy_stubs() {
129 // Call the conjoint generation methods immediately after
130 // the disjoint ones so that short branches from the former
131 // to the latter can be generated.
132 StubRoutines::_jbyte_disjoint_arraycopy = (address) fake_arraycopy_stub;
133 StubRoutines::_jbyte_arraycopy = (address) fake_arraycopy_stub;
134
135 StubRoutines::_jshort_disjoint_arraycopy = (address) fake_arraycopy_stub;
136 StubRoutines::_jshort_arraycopy = (address) fake_arraycopy_stub;
137
138 StubRoutines::_jint_disjoint_arraycopy = (address) fake_arraycopy_stub;
139 StubRoutines::_jint_arraycopy = (address) fake_arraycopy_stub;
140
141 StubRoutines::_jlong_disjoint_arraycopy = (address) fake_arraycopy_stub;
142 StubRoutines::_jlong_arraycopy = (address) fake_arraycopy_stub;
143
144 StubRoutines::_oop_disjoint_arraycopy = ShouldNotCallThisStub();
145 StubRoutines::_oop_arraycopy = ShouldNotCallThisStub();
146
147 StubRoutines::_checkcast_arraycopy = ShouldNotCallThisStub();
148 StubRoutines::_unsafe_arraycopy = ShouldNotCallThisStub();
149 StubRoutines::_generic_arraycopy = ShouldNotCallThisStub();
150
151 // We don't generate specialized code for HeapWord-aligned source
152 // arrays, so just use the code we've already generated
153 StubRoutines::_arrayof_jbyte_disjoint_arraycopy =
154 StubRoutines::_jbyte_disjoint_arraycopy;
155 StubRoutines::_arrayof_jbyte_arraycopy =
156 StubRoutines::_jbyte_arraycopy;
157
158 StubRoutines::_arrayof_jshort_disjoint_arraycopy =
159 StubRoutines::_jshort_disjoint_arraycopy;
160 StubRoutines::_arrayof_jshort_arraycopy =
161 StubRoutines::_jshort_arraycopy;
162
163 StubRoutines::_arrayof_jint_disjoint_arraycopy =
164 StubRoutines::_jint_disjoint_arraycopy;
165 StubRoutines::_arrayof_jint_arraycopy =
166 StubRoutines::_jint_arraycopy;
167
168 StubRoutines::_arrayof_jlong_disjoint_arraycopy =
169 StubRoutines::_jlong_disjoint_arraycopy;
170 StubRoutines::_arrayof_jlong_arraycopy =
171 StubRoutines::_jlong_arraycopy;
172
173 StubRoutines::_arrayof_oop_disjoint_arraycopy =
174 StubRoutines::_oop_disjoint_arraycopy;
175 StubRoutines::_arrayof_oop_arraycopy =
176 StubRoutines::_oop_arraycopy;
177 }
178
179 static int SafeFetch32(int *adr, int errValue) {
180 int value = errValue;
181 value = *adr;
182 return value;
183 }
184
185 static intptr_t SafeFetchN(intptr_t *adr, intptr_t errValue) {
186 intptr_t value = errValue;
187 value = *adr;
188 return value;
189 }
190
191
192 void generate_initial() {
193 // Generates all stubs and initializes the entry points
194
195 // entry points that exist in all platforms Note: This is code
196 // that could be shared among different platforms - however the
197 // benefit seems to be smaller than the disadvantage of having a
198 // much more complicated generator structure. See also comment in
199 // stubRoutines.hpp.
200
201 StubRoutines::_forward_exception_entry = ShouldNotCallThisStub();
202 StubRoutines::_call_stub_entry = (address) call_stub;
203 StubRoutines::_catch_exception_entry = ShouldNotCallThisStub();
204
205 // atomic calls
206 StubRoutines::_atomic_xchg_entry = ShouldNotCallThisStub();
207 StubRoutines::_atomic_xchg_ptr_entry = ShouldNotCallThisStub();
208 StubRoutines::_atomic_cmpxchg_entry = ShouldNotCallThisStub();
209 StubRoutines::_atomic_cmpxchg_ptr_entry = ShouldNotCallThisStub();
210 StubRoutines::_atomic_cmpxchg_long_entry = ShouldNotCallThisStub();
211 StubRoutines::_atomic_add_entry = ShouldNotCallThisStub();
212 StubRoutines::_atomic_add_ptr_entry = ShouldNotCallThisStub();
213 StubRoutines::_fence_entry = ShouldNotCallThisStub();
214
215 // amd64 does this here, sparc does it in generate_all()
216 StubRoutines::_handler_for_unsafe_access_entry =
217 ShouldNotCallThisStub();
218 }
219
220 void generate_all() {
221 // Generates all stubs and initializes the entry points
222
223 // These entry points require SharedInfo::stack0 to be set up in
224 // non-core builds and need to be relocatable, so they each
225 // fabricate a RuntimeStub internally.
226 StubRoutines::_throw_AbstractMethodError_entry =
227 ShouldNotCallThisStub();
228
229 StubRoutines::_throw_NullPointerException_at_call_entry =
230 ShouldNotCallThisStub();
231
232 StubRoutines::_throw_StackOverflowError_entry =
233 ShouldNotCallThisStub();
234
235 // support for verify_oop (must happen after universe_init)
236 StubRoutines::_verify_oop_subroutine_entry =
237 ShouldNotCallThisStub();
238
239 // arraycopy stubs used by compilers
240 generate_arraycopy_stubs();
241
242 // Safefetch stubs.
243 StubRoutines::_safefetch32_entry = CAST_FROM_FN_PTR(address, StubGenerator::SafeFetch32);
244 StubRoutines::_safefetch32_fault_pc = NULL;
245 StubRoutines::_safefetch32_continuation_pc = NULL;
246
247 StubRoutines::_safefetchN_entry = CAST_FROM_FN_PTR(address, StubGenerator::SafeFetchN);
248 StubRoutines::_safefetchN_fault_pc = NULL;
249 StubRoutines::_safefetchN_continuation_pc = NULL;
250 }
251
252 public:
253 StubGenerator(CodeBuffer* code, bool all) : StubCodeGenerator(code) {
254 if (all) {
255 generate_all();
256 } else {
257 generate_initial();
258 }
259 }
260 };
261
262 void StubGenerator_generate(CodeBuffer* code, bool all) {
263 StubGenerator g(code, all);
264 }
265
266 EntryFrame *EntryFrame::build(const intptr_t* parameters,
267 int parameter_words,
268 JavaCallWrapper* call_wrapper,
269 TRAPS) {
270
271 ZeroStack *stack = ((JavaThread *) THREAD)->zero_stack();
272 stack->overflow_check(header_words + parameter_words, CHECK_NULL);
273
274 stack->push(0); // next_frame, filled in later
275 intptr_t *fp = stack->sp();
276 assert(fp - stack->sp() == next_frame_off, "should be");
277
278 stack->push(ENTRY_FRAME);
279 assert(fp - stack->sp() == frame_type_off, "should be");
280
281 stack->push((intptr_t) call_wrapper);
282 assert(fp - stack->sp() == call_wrapper_off, "should be");
283
284 for (int i = 0; i < parameter_words; i++)
285 stack->push(parameters[i]);
286
287 return (EntryFrame *) fp;
288 }