1 /*
2  * Copyright (c) 2013, 2018, 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 
24 #include "jvmci/jvmciCodeInstaller.hpp"
25 #include "jvmci/jvmciRuntime.hpp"
26 #include "jvmci/jvmciCompilerToVM.hpp"
27 #include "jvmci/jvmciJavaClasses.hpp"
28 #include "oops/oop.inline.hpp"
29 #include "runtime/handles.inline.hpp"
30 #include "runtime/sharedRuntime.hpp"
31 #include "utilities/align.hpp"
32 #include "vmreg_sparc.inline.hpp"
33 
pd_next_offset(NativeInstruction * inst,jint pc_offset,Handle method,TRAPS)34 jint CodeInstaller::pd_next_offset(NativeInstruction* inst, jint pc_offset, Handle method, TRAPS) {
35   if (inst->is_call() || inst->is_jump()) {
36     return pc_offset + NativeCall::instruction_size;
37   } else if (inst->is_call_reg()) {
38     return pc_offset + NativeCallReg::instruction_size;
39   } else if (inst->is_sethi()) {
40     return pc_offset + NativeFarCall::instruction_size;
41   } else {
42     JVMCI_ERROR_0("unsupported type of instruction for call site");
43     return 0;
44   }
45 }
46 
pd_patch_OopConstant(int pc_offset,Handle constant,TRAPS)47 void CodeInstaller::pd_patch_OopConstant(int pc_offset, Handle constant, TRAPS) {
48   address pc = _instructions->start() + pc_offset;
49   Handle obj(THREAD, HotSpotObjectConstantImpl::object(constant));
50   jobject value = JNIHandles::make_local(obj());
51   if (HotSpotObjectConstantImpl::compressed(constant)) {
52     int oop_index = _oop_recorder->find_index(value);
53     RelocationHolder rspec = oop_Relocation::spec(oop_index);
54     _instructions->relocate(pc, rspec, 1);
55   } else {
56     NativeMovConstReg* move = nativeMovConstReg_at(pc);
57     move->set_data((intptr_t) value);
58 
59     // We need two relocations:  one on the sethi and one on the add.
60     int oop_index = _oop_recorder->find_index(value);
61     RelocationHolder rspec = oop_Relocation::spec(oop_index);
62     _instructions->relocate(pc + NativeMovConstReg::sethi_offset, rspec);
63     _instructions->relocate(pc + NativeMovConstReg::add_offset, rspec);
64   }
65 }
66 
pd_patch_MetaspaceConstant(int pc_offset,Handle constant,TRAPS)67 void CodeInstaller::pd_patch_MetaspaceConstant(int pc_offset, Handle constant, TRAPS) {
68   address pc = _instructions->start() + pc_offset;
69   if (HotSpotMetaspaceConstantImpl::compressed(constant)) {
70     NativeMovConstReg32* move = nativeMovConstReg32_at(pc);
71     narrowKlass narrowOop = record_narrow_metadata_reference(_instructions, pc, constant, CHECK);
72     move->set_data((intptr_t)narrowOop);
73     TRACE_jvmci_3("relocating (narrow metaspace constant) at " PTR_FORMAT "/0x%x", p2i(pc), narrowOop);
74   } else {
75     NativeMovConstReg* move = nativeMovConstReg_at(pc);
76     void* reference = record_metadata_reference(_instructions, pc, constant, CHECK);
77     move->set_data((intptr_t)reference);
78     TRACE_jvmci_3("relocating (metaspace constant) at " PTR_FORMAT "/" PTR_FORMAT, p2i(pc), p2i(reference));
79   }
80 }
81 
pd_patch_DataSectionReference(int pc_offset,int data_offset,TRAPS)82 void CodeInstaller::pd_patch_DataSectionReference(int pc_offset, int data_offset, TRAPS) {
83   address pc = _instructions->start() + pc_offset;
84   NativeInstruction* inst = nativeInstruction_at(pc);
85   NativeInstruction* inst1 = nativeInstruction_at(pc + 4);
86   if(inst->is_sethi() && inst1->is_nop()) {
87       address const_start = _constants->start();
88       address dest = _constants->start() + data_offset;
89       if(_constants_size > 0) {
90         _instructions->relocate(pc + NativeMovConstReg::sethi_offset, internal_word_Relocation::spec((address) dest));
91         _instructions->relocate(pc + NativeMovConstReg::add_offset, internal_word_Relocation::spec((address) dest));
92       }
93       TRACE_jvmci_3("relocating at " PTR_FORMAT " (+%d) with destination at %d", p2i(pc), pc_offset, data_offset);
94   }else {
95     int const_size = align_up(_constants->end()-_constants->start(), CodeEntryAlignment);
96     NativeMovRegMem* load = nativeMovRegMem_at(pc);
97     // This offset must match with SPARCLoadConstantTableBaseOp.emitCode
98     load->set_offset(- (const_size - data_offset + Assembler::min_simm13()));
99     TRACE_jvmci_3("relocating ld at " PTR_FORMAT " (+%d) with destination at %d", p2i(pc), pc_offset, data_offset);
100   }
101 }
102 
pd_relocate_ForeignCall(NativeInstruction * inst,jlong foreign_call_destination,TRAPS)103 void CodeInstaller::pd_relocate_ForeignCall(NativeInstruction* inst, jlong foreign_call_destination, TRAPS) {
104   address pc = (address) inst;
105   if (inst->is_call()) {
106     NativeCall* call = nativeCall_at(pc);
107     call->set_destination((address) foreign_call_destination);
108     _instructions->relocate(call->instruction_address(), runtime_call_Relocation::spec());
109   } else if (inst->is_sethi()) {
110     NativeJump* jump = nativeJump_at(pc);
111     jump->set_jump_destination((address) foreign_call_destination);
112     _instructions->relocate(jump->instruction_address(), runtime_call_Relocation::spec());
113   } else {
114     JVMCI_ERROR("unknown call or jump instruction at " PTR_FORMAT, p2i(pc));
115   }
116   TRACE_jvmci_3("relocating (foreign call) at " PTR_FORMAT, p2i(inst));
117 }
118 
pd_relocate_JavaMethod(CodeBuffer &,Handle hotspot_method,jint pc_offset,TRAPS)119 void CodeInstaller::pd_relocate_JavaMethod(CodeBuffer &, Handle hotspot_method, jint pc_offset, TRAPS) {
120 #ifdef ASSERT
121   Method* method = NULL;
122   // we need to check, this might also be an unresolved method
123   if (hotspot_method->is_a(HotSpotResolvedJavaMethodImpl::klass())) {
124     method = getMethodFromHotSpotMethod(hotspot_method());
125   }
126 #endif
127   switch (_next_call_type) {
128     case INLINE_INVOKE:
129       break;
130     case INVOKEVIRTUAL:
131     case INVOKEINTERFACE: {
132       assert(method == NULL || !method->is_static(), "cannot call static method with invokeinterface");
133       NativeCall* call = nativeCall_at(_instructions->start() + pc_offset);
134       call->set_destination(SharedRuntime::get_resolve_virtual_call_stub());
135       _instructions->relocate(call->instruction_address(), virtual_call_Relocation::spec(_invoke_mark_pc));
136       break;
137     }
138     case INVOKESTATIC: {
139       assert(method == NULL || method->is_static(), "cannot call non-static method with invokestatic");
140       NativeCall* call = nativeCall_at(_instructions->start() + pc_offset);
141       call->set_destination(SharedRuntime::get_resolve_static_call_stub());
142       _instructions->relocate(call->instruction_address(), relocInfo::static_call_type);
143       break;
144     }
145     case INVOKESPECIAL: {
146       assert(method == NULL || !method->is_static(), "cannot call static method with invokespecial");
147       NativeCall* call = nativeCall_at(_instructions->start() + pc_offset);
148       call->set_destination(SharedRuntime::get_resolve_opt_virtual_call_stub());
149       _instructions->relocate(call->instruction_address(), relocInfo::opt_virtual_call_type);
150       break;
151     }
152     default:
153       JVMCI_ERROR("invalid _next_call_type value");
154       break;
155   }
156 }
157 
pd_relocate_poll(address pc,jint mark,TRAPS)158 void CodeInstaller::pd_relocate_poll(address pc, jint mark, TRAPS) {
159   switch (mark) {
160     case POLL_NEAR:
161       JVMCI_ERROR("unimplemented");
162       break;
163     case POLL_FAR:
164       _instructions->relocate(pc, relocInfo::poll_type);
165       break;
166     case POLL_RETURN_NEAR:
167       JVMCI_ERROR("unimplemented");
168       break;
169     case POLL_RETURN_FAR:
170       _instructions->relocate(pc, relocInfo::poll_return_type);
171       break;
172     default:
173       JVMCI_ERROR("invalid mark value");
174       break;
175   }
176 }
177 
178 // convert JVMCI register indices (as used in oop maps) to HotSpot registers
get_hotspot_reg(jint jvmci_reg,TRAPS)179 VMReg CodeInstaller::get_hotspot_reg(jint jvmci_reg, TRAPS) {
180   // JVMCI Registers are numbered as follows:
181   //   0..31: Thirty-two General Purpose registers (CPU Registers)
182   //   32..63: Thirty-two single precision float registers
183   //   64..95: Thirty-two double precision float registers
184   //   96..111: Sixteen quad precision float registers
185   if (jvmci_reg < 32) {
186     return as_Register(jvmci_reg)->as_VMReg();
187   } else {
188     jint floatRegisterNumber;
189     if(jvmci_reg < 64) { // Single precision
190       floatRegisterNumber = jvmci_reg - 32;
191     } else if(jvmci_reg < 96) {
192       floatRegisterNumber = 2 * (jvmci_reg - 64);
193     } else if(jvmci_reg < 112) {
194       floatRegisterNumber = 4 * (jvmci_reg - 96);
195     } else {
196       JVMCI_ERROR_NULL("invalid register number: %d", jvmci_reg);
197     }
198     return as_FloatRegister(floatRegisterNumber)->as_VMReg();
199   }
200 }
201 
is_general_purpose_reg(VMReg hotspotRegister)202 bool CodeInstaller::is_general_purpose_reg(VMReg hotspotRegister) {
203   return !hotspotRegister->is_FloatRegister();
204 }
205