1 /*
2 * Copyright (c) 2003, 2010, 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/methodOop.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 "stack_zero.inline.hpp"
42 #include "utilities/top.hpp"
43 #ifdef TARGET_OS_FAMILY_linux
44 # include "thread_linux.inline.hpp"
45 #endif
46 #ifdef TARGET_OS_FAMILY_bsd
47 # include "thread_bsd.inline.hpp"
48 #endif
49 #ifdef COMPILER2
50 #include "opto/runtime.hpp"
51 #endif
52
53 // Declaration and definition of StubGenerator (no .hpp file).
54 // For a more detailed description of the stub routine structure
55 // see the comment in stubRoutines.hpp
56
57 class StubGenerator: public StubCodeGenerator {
58 private:
59 // The call stub is used to call Java from C
60 static void call_stub(
61 JavaCallWrapper *call_wrapper,
62 intptr_t* result,
63 BasicType result_type,
64 methodOop method,
65 address entry_point,
66 intptr_t* parameters,
67 int parameter_words,
68 TRAPS) {
69 JavaThread *thread = (JavaThread *) THREAD;
70 ZeroStack *stack = thread->zero_stack();
71
72 // Make sure we have no pending exceptions
73 assert(!HAS_PENDING_EXCEPTION, "call_stub called with pending exception");
74
75 // Set up the stack if necessary
76 bool stack_needs_teardown = false;
77 if (stack->needs_setup()) {
78 size_t zero_stack_size = stack->suggest_size(thread);
79 stack->setup(alloca(zero_stack_size), zero_stack_size);
80 stack_needs_teardown = true;
81 }
82
83 // Allocate and initialize our frame
84 EntryFrame *frame =
85 EntryFrame::build(parameters, parameter_words, call_wrapper, THREAD);
86
87 if (!HAS_PENDING_EXCEPTION) {
88 // Push the frame
89 thread->push_zero_frame(frame);
90
91 // Make the call
92 Interpreter::invoke_method(method, entry_point, THREAD);
93
94 // Store the result
95 if (!HAS_PENDING_EXCEPTION) {
96 switch (result_type) {
97 case T_INT:
98 *(jint *) result = *(jint *) stack->sp();
99 break;
100 case T_LONG:
101 *(jlong *) result = *(jlong *) stack->sp();
102 break;
103 case T_FLOAT:
104 *(jfloat *) result = *(jfloat *) stack->sp();
105 break;
106 case T_DOUBLE:
107 *(jdouble *) result = *(jdouble *) stack->sp();
108 break;
109 case T_OBJECT:
110 *(oop *) result = *(oop *) stack->sp();
111 break;
112 default:
113 ShouldNotReachHere();
114 }
115 }
116
117 // Unwind the frame
118 thread->pop_zero_frame();
119 }
120
121 // Tear down the stack if necessary
122 if (stack_needs_teardown)
123 stack->teardown();
124 }
125
126 // These stubs get called from some dumb test routine.
127 // I'll write them properly when they're called from
128 // something that's actually doing something.
129 static void fake_arraycopy_stub(address src, address dst, int count) {
130 assert(count == 0, "huh?");
131 }
132
133 void generate_arraycopy_stubs() {
134 // Call the conjoint generation methods immediately after
135 // the disjoint ones so that short branches from the former
136 // to the latter can be generated.
137 StubRoutines::_jbyte_disjoint_arraycopy = (address) fake_arraycopy_stub;
138 StubRoutines::_jbyte_arraycopy = (address) fake_arraycopy_stub;
139
140 StubRoutines::_jshort_disjoint_arraycopy = (address) fake_arraycopy_stub;
141 StubRoutines::_jshort_arraycopy = (address) fake_arraycopy_stub;
142
143 StubRoutines::_jint_disjoint_arraycopy = (address) fake_arraycopy_stub;
144 StubRoutines::_jint_arraycopy = (address) fake_arraycopy_stub;
145
146 StubRoutines::_jlong_disjoint_arraycopy = (address) fake_arraycopy_stub;
147 StubRoutines::_jlong_arraycopy = (address) fake_arraycopy_stub;
148
149 StubRoutines::_oop_disjoint_arraycopy = ShouldNotCallThisStub();
150 StubRoutines::_oop_arraycopy = ShouldNotCallThisStub();
151
152 StubRoutines::_checkcast_arraycopy = ShouldNotCallThisStub();
153 StubRoutines::_unsafe_arraycopy = ShouldNotCallThisStub();
154 StubRoutines::_generic_arraycopy = ShouldNotCallThisStub();
155
156 // We don't generate specialized code for HeapWord-aligned source
157 // arrays, so just use the code we've already generated
158 StubRoutines::_arrayof_jbyte_disjoint_arraycopy =
159 StubRoutines::_jbyte_disjoint_arraycopy;
160 StubRoutines::_arrayof_jbyte_arraycopy =
161 StubRoutines::_jbyte_arraycopy;
162
163 StubRoutines::_arrayof_jshort_disjoint_arraycopy =
164 StubRoutines::_jshort_disjoint_arraycopy;
165 StubRoutines::_arrayof_jshort_arraycopy =
166 StubRoutines::_jshort_arraycopy;
167
168 StubRoutines::_arrayof_jint_disjoint_arraycopy =
169 StubRoutines::_jint_disjoint_arraycopy;
170 StubRoutines::_arrayof_jint_arraycopy =
171 StubRoutines::_jint_arraycopy;
172
173 StubRoutines::_arrayof_jlong_disjoint_arraycopy =
174 StubRoutines::_jlong_disjoint_arraycopy;
175 StubRoutines::_arrayof_jlong_arraycopy =
176 StubRoutines::_jlong_arraycopy;
177
178 StubRoutines::_arrayof_oop_disjoint_arraycopy =
179 StubRoutines::_oop_disjoint_arraycopy;
180 StubRoutines::_arrayof_oop_arraycopy =
181 StubRoutines::_oop_arraycopy;
182 }
183
184 void generate_initial() {
185 // Generates all stubs and initializes the entry points
186
187 // entry points that exist in all platforms Note: This is code
188 // that could be shared among different platforms - however the
189 // benefit seems to be smaller than the disadvantage of having a
190 // much more complicated generator structure. See also comment in
191 // stubRoutines.hpp.
192
193 StubRoutines::_forward_exception_entry = ShouldNotCallThisStub();
194 StubRoutines::_call_stub_entry = (address) call_stub;
195 StubRoutines::_catch_exception_entry = ShouldNotCallThisStub();
196
197 // atomic calls
198 StubRoutines::_atomic_xchg_entry = ShouldNotCallThisStub();
199 StubRoutines::_atomic_xchg_ptr_entry = ShouldNotCallThisStub();
200 StubRoutines::_atomic_cmpxchg_entry = ShouldNotCallThisStub();
201 StubRoutines::_atomic_cmpxchg_ptr_entry = ShouldNotCallThisStub();
202 StubRoutines::_atomic_cmpxchg_long_entry = ShouldNotCallThisStub();
203 StubRoutines::_atomic_add_entry = ShouldNotCallThisStub();
204 StubRoutines::_atomic_add_ptr_entry = ShouldNotCallThisStub();
205 StubRoutines::_fence_entry = ShouldNotCallThisStub();
206
207 // amd64 does this here, sparc does it in generate_all()
208 StubRoutines::_handler_for_unsafe_access_entry =
209 ShouldNotCallThisStub();
210 }
211
212 void generate_all() {
213 // Generates all stubs and initializes the entry points
214
215 // These entry points require SharedInfo::stack0 to be set up in
216 // non-core builds and need to be relocatable, so they each
217 // fabricate a RuntimeStub internally.
218 StubRoutines::_throw_AbstractMethodError_entry =
219 ShouldNotCallThisStub();
220
221 StubRoutines::_throw_NullPointerException_at_call_entry =
222 ShouldNotCallThisStub();
223
224 StubRoutines::_throw_StackOverflowError_entry =
225 ShouldNotCallThisStub();
226
227 // support for verify_oop (must happen after universe_init)
228 StubRoutines::_verify_oop_subroutine_entry =
229 ShouldNotCallThisStub();
230
231 // arraycopy stubs used by compilers
232 generate_arraycopy_stubs();
233 }
234
235 public:
236 StubGenerator(CodeBuffer* code, bool all) : StubCodeGenerator(code) {
237 if (all) {
238 generate_all();
239 } else {
240 generate_initial();
241 }
242 }
243 };
244
245 void StubGenerator_generate(CodeBuffer* code, bool all) {
246 StubGenerator g(code, all);
247 }
248
249 EntryFrame *EntryFrame::build(const intptr_t* parameters,
250 int parameter_words,
251 JavaCallWrapper* call_wrapper,
252 TRAPS) {
253
254 ZeroStack *stack = ((JavaThread *) THREAD)->zero_stack();
255 stack->overflow_check(header_words + parameter_words, CHECK_NULL);
256
257 stack->push(0); // next_frame, filled in later
258 intptr_t *fp = stack->sp();
259 assert(fp - stack->sp() == next_frame_off, "should be");
260
261 stack->push(ENTRY_FRAME);
262 assert(fp - stack->sp() == frame_type_off, "should be");
263
264 stack->push((intptr_t) call_wrapper);
265 assert(fp - stack->sp() == call_wrapper_off, "should be");
266
267 for (int i = 0; i < parameter_words; i++)
268 stack->push(parameters[i]);
269
270 return (EntryFrame *) fp;
271 }