Sat, 07 Nov 2020 10:30:02 +0800
Added tag mips-jdk8u275-b01 for changeset d3b4d62f391f
1 /*
2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
25 #include "precompiled.hpp"
26 #include "asm/macroAssembler.inline.hpp"
27 #include "code/compiledIC.hpp"
28 #include "code/icBuffer.hpp"
29 #include "code/nmethod.hpp"
30 #include "memory/resourceArea.hpp"
31 #include "runtime/mutexLocker.hpp"
32 #include "runtime/safepoint.hpp"
34 // Release the CompiledICHolder* associated with this call site is there is one.
35 void CompiledIC::cleanup_call_site(virtual_call_Relocation* call_site) {
36 // This call site might have become stale so inspect it carefully.
37 NativeCall* call = nativeCall_at(call_site->addr());
38 if (is_icholder_entry(call->destination())) {
39 NativeMovConstReg* value = nativeMovConstReg_at(call_site->cached_value());
40 InlineCacheBuffer::queue_for_release((CompiledICHolder*)value->data());
41 }
42 }
44 bool CompiledIC::is_icholder_call_site(virtual_call_Relocation* call_site) {
45 // This call site might have become stale so inspect it carefully.
46 NativeCall* call = nativeCall_at(call_site->addr());
47 return is_icholder_entry(call->destination());
48 }
50 // ----------------------------------------------------------------------------
52 #define __ _masm.
53 address CompiledStaticCall::emit_to_interp_stub(CodeBuffer &cbuf) {
54 // Stub is fixed up when the corresponding call is converted from
55 // calling compiled code to calling interpreted code.
56 // movq rbx, 0
57 // jmp -5 # to self
59 address mark = cbuf.insts_mark(); // Get mark within main instrs section.
61 // Note that the code buffer's insts_mark is always relative to insts.
62 // That's why we must use the macroassembler to generate a stub.
63 MacroAssembler _masm(&cbuf);
65 address base = __ start_a_stub(to_interp_stub_size());
66 if (base == NULL) {
67 return NULL; // CodeBuffer::expand failed.
68 }
69 // Static stub relocation stores the instruction address of the call.
70 __ relocate(static_stub_Relocation::spec(mark), Assembler::imm_operand);
71 // Static stub relocation also tags the Method* in the code-stream.
72 __ mov_metadata(rbx, (Metadata*) NULL); // Method is zapped till fixup time.
73 // This is recognized as unresolved by relocs/nativeinst/ic code.
74 __ jump(RuntimeAddress(__ pc()));
76 // Update current stubs pointer and restore insts_end.
77 __ end_a_stub();
78 return base;
79 }
80 #undef __
82 int CompiledStaticCall::to_interp_stub_size() {
83 return NOT_LP64(10) // movl; jmp
84 LP64_ONLY(15); // movq (1+1+8); jmp (1+4)
85 }
87 // Relocation entries for call stub, compiled java to interpreter.
88 int CompiledStaticCall::reloc_to_interp_stub() {
89 return 4; // 3 in emit_to_interp_stub + 1 in emit_call
90 }
92 void CompiledStaticCall::set_to_interpreted(methodHandle callee, address entry) {
93 address stub = find_stub();
94 guarantee(stub != NULL, "stub not found");
96 if (TraceICs) {
97 ResourceMark rm;
98 tty->print_cr("CompiledStaticCall@" INTPTR_FORMAT ": set_to_interpreted %s",
99 p2i(instruction_address()),
100 callee->name_and_sig_as_C_string());
101 }
103 // Creation also verifies the object.
104 NativeMovConstReg* method_holder = nativeMovConstReg_at(stub);
105 NativeJump* jump = nativeJump_at(method_holder->next_instruction_address());
107 assert(method_holder->data() == 0 || method_holder->data() == (intptr_t)callee(),
108 "a) MT-unsafe modification of inline cache");
109 assert(jump->jump_destination() == (address)-1 || jump->jump_destination() == entry,
110 "b) MT-unsafe modification of inline cache");
112 // Update stub.
113 method_holder->set_data((intptr_t)callee());
114 jump->set_jump_destination(entry);
116 // Update jump to call.
117 set_destination_mt_safe(stub);
118 }
120 void CompiledStaticCall::set_stub_to_clean(static_stub_Relocation* static_stub) {
121 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "mt unsafe call");
122 // Reset stub.
123 address stub = static_stub->addr();
124 assert(stub != NULL, "stub not found");
125 // Creation also verifies the object.
126 NativeMovConstReg* method_holder = nativeMovConstReg_at(stub);
127 NativeJump* jump = nativeJump_at(method_holder->next_instruction_address());
128 method_holder->set_data(0);
129 jump->set_jump_destination((address)-1);
130 }
132 //-----------------------------------------------------------------------------
133 // Non-product mode code
134 #ifndef PRODUCT
136 void CompiledStaticCall::verify() {
137 // Verify call.
138 NativeCall::verify();
139 if (os::is_MP()) {
140 verify_alignment();
141 }
143 // Verify stub.
144 address stub = find_stub();
145 assert(stub != NULL, "no stub found for static call");
146 // Creation also verifies the object.
147 NativeMovConstReg* method_holder = nativeMovConstReg_at(stub);
148 NativeJump* jump = nativeJump_at(method_holder->next_instruction_address());
150 // Verify state.
151 assert(is_clean() || is_call_to_compiled() || is_call_to_interpreted(), "sanity check");
152 }
154 #endif // !PRODUCT