Mercurial > hg > truffle
annotate src/cpu/x86/vm/methodHandles_x86.cpp @ 6392:4f7b8550daf8
Merge
author | Gilles Duboscq <duboscq@ssw.jku.at> |
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date | Fri, 14 Sep 2012 13:50:49 +0200 |
parents | 1d7922586cf6 |
children | da91efe96a93 |
rev | line source |
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710 | 1 /* |
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2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. |
710 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
710 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "interpreter/interpreter.hpp" | |
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27 #include "interpreter/interpreterRuntime.hpp" |
1972 | 28 #include "memory/allocation.inline.hpp" |
29 #include "prims/methodHandles.hpp" | |
710 | 30 |
31 #define __ _masm-> | |
32 | |
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33 #ifdef PRODUCT |
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34 #define BLOCK_COMMENT(str) /* nothing */ |
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35 #define STOP(error) stop(error) |
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36 #else |
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37 #define BLOCK_COMMENT(str) __ block_comment(str) |
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38 #define STOP(error) block_comment(error); __ stop(error) |
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39 #endif |
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40 |
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41 #define BIND(label) bind(label); BLOCK_COMMENT(#label ":") |
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42 |
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43 // Workaround for C++ overloading nastiness on '0' for RegisterOrConstant. |
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44 static RegisterOrConstant constant(int value) { |
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45 return RegisterOrConstant(value); |
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46 } |
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47 |
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48 void MethodHandles::load_klass_from_Class(MacroAssembler* _masm, Register klass_reg) { |
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49 if (VerifyMethodHandles) |
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50 verify_klass(_masm, klass_reg, SystemDictionaryHandles::Class_klass(), |
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51 "MH argument is a Class"); |
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52 __ load_heap_oop(klass_reg, Address(klass_reg, java_lang_Class::klass_offset_in_bytes())); |
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53 } |
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54 |
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55 #ifdef ASSERT |
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56 static int check_nonzero(const char* xname, int x) { |
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57 assert(x != 0, err_msg("%s should be nonzero", xname)); |
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58 return x; |
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59 } |
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60 #define NONZERO(x) check_nonzero(#x, x) |
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61 #else //ASSERT |
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62 #define NONZERO(x) (x) |
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63 #endif //ASSERT |
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64 |
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65 #ifdef ASSERT |
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66 void MethodHandles::verify_klass(MacroAssembler* _masm, |
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67 Register obj, KlassHandle klass, |
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68 const char* error_message) { |
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69 oop* klass_addr = klass.raw_value(); |
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70 assert(klass_addr >= SystemDictionaryHandles::Object_klass().raw_value() && |
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71 klass_addr <= SystemDictionaryHandles::Long_klass().raw_value(), |
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72 "must be one of the SystemDictionaryHandles"); |
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73 Register temp = rdi; |
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74 Register temp2 = noreg; |
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75 LP64_ONLY(temp2 = rscratch1); // used by MacroAssembler::cmpptr |
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76 Label L_ok, L_bad; |
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77 BLOCK_COMMENT("verify_klass {"); |
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78 __ verify_oop(obj); |
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79 __ testptr(obj, obj); |
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80 __ jcc(Assembler::zero, L_bad); |
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81 __ push(temp); if (temp2 != noreg) __ push(temp2); |
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82 #define UNPUSH { if (temp2 != noreg) __ pop(temp2); __ pop(temp); } |
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83 __ load_klass(temp, obj); |
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84 __ cmpptr(temp, ExternalAddress((address) klass_addr)); |
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85 __ jcc(Assembler::equal, L_ok); |
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86 intptr_t super_check_offset = klass->super_check_offset(); |
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87 __ movptr(temp, Address(temp, super_check_offset)); |
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88 __ cmpptr(temp, ExternalAddress((address) klass_addr)); |
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89 __ jcc(Assembler::equal, L_ok); |
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90 UNPUSH; |
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91 __ bind(L_bad); |
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92 __ STOP(error_message); |
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93 __ BIND(L_ok); |
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94 UNPUSH; |
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95 BLOCK_COMMENT("} verify_klass"); |
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96 } |
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97 |
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98 void MethodHandles::verify_ref_kind(MacroAssembler* _masm, int ref_kind, Register member_reg, Register temp) { |
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99 Label L; |
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100 BLOCK_COMMENT("verify_ref_kind {"); |
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101 __ movl(temp, Address(member_reg, NONZERO(java_lang_invoke_MemberName::flags_offset_in_bytes()))); |
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102 __ shrl(temp, java_lang_invoke_MemberName::MN_REFERENCE_KIND_SHIFT); |
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103 __ andl(temp, java_lang_invoke_MemberName::MN_REFERENCE_KIND_MASK); |
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104 __ cmpl(temp, ref_kind); |
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105 __ jcc(Assembler::equal, L); |
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106 { char* buf = NEW_C_HEAP_ARRAY(char, 100, mtInternal); |
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107 jio_snprintf(buf, 100, "verify_ref_kind expected %x", ref_kind); |
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108 if (ref_kind == JVM_REF_invokeVirtual || |
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109 ref_kind == JVM_REF_invokeSpecial) |
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110 // could do this for all ref_kinds, but would explode assembly code size |
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111 trace_method_handle(_masm, buf); |
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112 __ STOP(buf); |
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113 } |
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114 BLOCK_COMMENT("} verify_ref_kind"); |
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115 __ bind(L); |
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116 } |
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117 |
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118 #endif //ASSERT |
710 | 119 |
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120 void MethodHandles::jump_from_method_handle(MacroAssembler* _masm, Register method, Register temp, |
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121 bool for_compiler_entry) { |
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122 assert(method == rbx, "interpreter calling convention"); |
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123 __ verify_oop(method); |
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124 |
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125 if (!for_compiler_entry && JvmtiExport::can_post_interpreter_events()) { |
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126 Label run_compiled_code; |
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127 // JVMTI events, such as single-stepping, are implemented partly by avoiding running |
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128 // compiled code in threads for which the event is enabled. Check here for |
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129 // interp_only_mode if these events CAN be enabled. |
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130 #ifdef _LP64 |
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131 Register rthread = r15_thread; |
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132 #else |
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133 Register rthread = temp; |
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134 __ get_thread(rthread); |
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135 #endif |
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136 // interp_only is an int, on little endian it is sufficient to test the byte only |
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137 // Is a cmpl faster? |
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138 __ cmpb(Address(rthread, JavaThread::interp_only_mode_offset()), 0); |
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139 __ jccb(Assembler::zero, run_compiled_code); |
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140 __ jmp(Address(method, methodOopDesc::interpreter_entry_offset())); |
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141 __ BIND(run_compiled_code); |
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142 } |
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143 |
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144 const ByteSize entry_offset = for_compiler_entry ? methodOopDesc::from_compiled_offset() : |
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145 methodOopDesc::from_interpreted_offset(); |
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146 __ jmp(Address(method, entry_offset)); |
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147 } |
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148 |
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149 void MethodHandles::jump_to_lambda_form(MacroAssembler* _masm, |
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150 Register recv, Register method_temp, |
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151 Register temp2, |
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152 bool for_compiler_entry) { |
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153 BLOCK_COMMENT("jump_to_lambda_form {"); |
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154 // This is the initial entry point of a lazy method handle. |
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155 // After type checking, it picks up the invoker from the LambdaForm. |
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156 assert_different_registers(recv, method_temp, temp2); |
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157 assert(recv != noreg, "required register"); |
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158 assert(method_temp == rbx, "required register for loading method"); |
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159 |
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160 //NOT_PRODUCT({ FlagSetting fs(TraceMethodHandles, true); trace_method_handle(_masm, "LZMH"); }); |
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161 |
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162 // Load the invoker, as MH -> MH.form -> LF.vmentry |
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163 __ verify_oop(recv); |
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164 __ load_heap_oop(method_temp, Address(recv, NONZERO(java_lang_invoke_MethodHandle::form_offset_in_bytes()))); |
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165 __ verify_oop(method_temp); |
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166 __ load_heap_oop(method_temp, Address(method_temp, NONZERO(java_lang_invoke_LambdaForm::vmentry_offset_in_bytes()))); |
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167 __ verify_oop(method_temp); |
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168 // the following assumes that a methodOop is normally compressed in the vmtarget field: |
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169 __ load_heap_oop(method_temp, Address(method_temp, NONZERO(java_lang_invoke_MemberName::vmtarget_offset_in_bytes()))); |
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170 __ verify_oop(method_temp); |
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171 |
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172 if (VerifyMethodHandles && !for_compiler_entry) { |
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173 // make sure recv is already on stack |
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174 __ load_sized_value(temp2, |
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175 Address(method_temp, methodOopDesc::size_of_parameters_offset()), |
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176 sizeof(u2), /*is_signed*/ false); |
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177 // assert(sizeof(u2) == sizeof(methodOopDesc::_size_of_parameters), ""); |
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178 Label L; |
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179 __ cmpptr(recv, __ argument_address(temp2, -1)); |
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180 __ jcc(Assembler::equal, L); |
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181 __ movptr(rax, __ argument_address(temp2, -1)); |
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182 __ STOP("receiver not on stack"); |
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183 __ BIND(L); |
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184 } |
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185 |
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186 jump_from_method_handle(_masm, method_temp, temp2, for_compiler_entry); |
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187 BLOCK_COMMENT("} jump_to_lambda_form"); |
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188 } |
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189 |
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190 |
710 | 191 // Code generation |
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192 address MethodHandles::generate_method_handle_interpreter_entry(MacroAssembler* _masm, |
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193 vmIntrinsics::ID iid) { |
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194 const bool not_for_compiler_entry = false; // this is the interpreter entry |
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195 assert(is_signature_polymorphic(iid), "expected invoke iid"); |
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196 if (iid == vmIntrinsics::_invokeGeneric || |
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197 iid == vmIntrinsics::_compiledLambdaForm) { |
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198 // Perhaps surprisingly, the symbolic references visible to Java are not directly used. |
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199 // They are linked to Java-generated adapters via MethodHandleNatives.linkMethod. |
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200 // They all allow an appendix argument. |
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201 __ hlt(); // empty stubs make SG sick |
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202 return NULL; |
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203 } |
710 | 204 |
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205 // rsi/r13: sender SP (must preserve; see prepare_to_jump_from_interpreted) |
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206 // rbx: methodOop |
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207 // rdx: argument locator (parameter slot count, added to rsp) |
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208 // rcx: used as temp to hold mh or receiver |
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209 // rax, rdi: garbage temps, blown away |
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210 Register rdx_argp = rdx; // argument list ptr, live on error paths |
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211 Register rax_temp = rax; |
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212 Register rcx_mh = rcx; // MH receiver; dies quickly and is recycled |
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213 Register rbx_method = rbx; // eventual target of this invocation |
710 | 214 |
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215 address code_start = __ pc(); |
710 | 216 |
217 // here's where control starts out: | |
218 __ align(CodeEntryAlignment); | |
219 address entry_point = __ pc(); | |
220 | |
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221 if (VerifyMethodHandles) { |
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222 Label L; |
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223 BLOCK_COMMENT("verify_intrinsic_id {"); |
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224 __ cmpb(Address(rbx_method, methodOopDesc::intrinsic_id_offset_in_bytes()), (int) iid); |
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225 __ jcc(Assembler::equal, L); |
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226 if (iid == vmIntrinsics::_linkToVirtual || |
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227 iid == vmIntrinsics::_linkToSpecial) { |
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228 // could do this for all kinds, but would explode assembly code size |
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229 trace_method_handle(_masm, "bad methodOop::intrinsic_id"); |
710 | 230 } |
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231 __ STOP("bad methodOop::intrinsic_id"); |
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232 __ bind(L); |
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233 BLOCK_COMMENT("} verify_intrinsic_id"); |
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234 } |
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235 |
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236 // First task: Find out how big the argument list is. |
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237 Address rdx_first_arg_addr; |
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238 int ref_kind = signature_polymorphic_intrinsic_ref_kind(iid); |
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239 assert(ref_kind != 0 || iid == vmIntrinsics::_invokeBasic, "must be _invokeBasic or a linkTo intrinsic"); |
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240 if (ref_kind == 0 || MethodHandles::ref_kind_has_receiver(ref_kind)) { |
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241 __ load_sized_value(rdx_argp, |
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242 Address(rbx_method, methodOopDesc::size_of_parameters_offset()), |
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243 sizeof(u2), /*is_signed*/ false); |
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244 // assert(sizeof(u2) == sizeof(methodOopDesc::_size_of_parameters), ""); |
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245 rdx_first_arg_addr = __ argument_address(rdx_argp, -1); |
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246 } else { |
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247 DEBUG_ONLY(rdx_argp = noreg); |
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248 } |
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249 |
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250 if (!is_signature_polymorphic_static(iid)) { |
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251 __ movptr(rcx_mh, rdx_first_arg_addr); |
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252 DEBUG_ONLY(rdx_argp = noreg); |
710 | 253 } |
254 | |
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255 // rdx_first_arg_addr is live! |
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256 |
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257 if (TraceMethodHandles) { |
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258 const char* name = vmIntrinsics::name_at(iid); |
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259 if (*name == '_') name += 1; |
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260 const size_t len = strlen(name) + 50; |
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261 char* qname = NEW_C_HEAP_ARRAY(char, len, mtInternal); |
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262 const char* suffix = ""; |
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263 if (vmIntrinsics::method_for(iid) == NULL || |
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264 !vmIntrinsics::method_for(iid)->access_flags().is_public()) { |
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265 if (is_signature_polymorphic_static(iid)) |
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266 suffix = "/static"; |
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267 else |
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268 suffix = "/private"; |
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269 } |
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270 jio_snprintf(qname, len, "MethodHandle::interpreter_entry::%s%s", name, suffix); |
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271 // note: stub look for mh in rcx |
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272 trace_method_handle(_masm, qname); |
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273 } |
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274 |
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275 if (iid == vmIntrinsics::_invokeBasic) { |
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276 generate_method_handle_dispatch(_masm, iid, rcx_mh, noreg, not_for_compiler_entry); |
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277 |
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278 } else { |
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279 // Adjust argument list by popping the trailing MemberName argument. |
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280 Register rcx_recv = noreg; |
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281 if (MethodHandles::ref_kind_has_receiver(ref_kind)) { |
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282 // Load the receiver (not the MH; the actual MemberName's receiver) up from the interpreter stack. |
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283 __ movptr(rcx_recv = rcx, rdx_first_arg_addr); |
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284 } |
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285 DEBUG_ONLY(rdx_argp = noreg); |
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286 Register rbx_member = rbx_method; // MemberName ptr; incoming method ptr is dead now |
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287 __ pop(rax_temp); // return address |
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288 __ pop(rbx_member); // extract last argument |
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289 __ push(rax_temp); // re-push return address |
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290 generate_method_handle_dispatch(_masm, iid, rcx_recv, rbx_member, not_for_compiler_entry); |
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291 } |
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292 |
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293 if (PrintMethodHandleStubs) { |
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294 address code_end = __ pc(); |
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295 tty->print_cr("--------"); |
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296 tty->print_cr("method handle interpreter entry for %s", vmIntrinsics::name_at(iid)); |
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297 Disassembler::decode(code_start, code_end); |
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298 tty->cr(); |
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299 } |
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300 |
710 | 301 return entry_point; |
302 } | |
303 | |
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304 void MethodHandles::generate_method_handle_dispatch(MacroAssembler* _masm, |
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305 vmIntrinsics::ID iid, |
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306 Register receiver_reg, |
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307 Register member_reg, |
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308 bool for_compiler_entry) { |
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309 assert(is_signature_polymorphic(iid), "expected invoke iid"); |
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310 Register rbx_method = rbx; // eventual target of this invocation |
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311 // temps used in this code are not used in *either* compiled or interpreted calling sequences |
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312 #ifdef _LP64 |
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313 Register temp1 = rscratch1; |
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314 Register temp2 = rscratch2; |
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315 Register temp3 = rax; |
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316 if (for_compiler_entry) { |
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317 assert(receiver_reg == (iid == vmIntrinsics::_linkToStatic ? noreg : j_rarg0), "only valid assignment"); |
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318 assert_different_registers(temp1, j_rarg0, j_rarg1, j_rarg2, j_rarg3, j_rarg4, j_rarg5); |
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319 assert_different_registers(temp2, j_rarg0, j_rarg1, j_rarg2, j_rarg3, j_rarg4, j_rarg5); |
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320 assert_different_registers(temp3, j_rarg0, j_rarg1, j_rarg2, j_rarg3, j_rarg4, j_rarg5); |
710 | 321 } |
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322 #else |
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323 Register temp1 = (for_compiler_entry ? rsi : rdx); |
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324 Register temp2 = rdi; |
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325 Register temp3 = rax; |
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326 if (for_compiler_entry) { |
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327 assert(receiver_reg == (iid == vmIntrinsics::_linkToStatic ? noreg : rcx), "only valid assignment"); |
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328 assert_different_registers(temp1, rcx, rdx); |
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329 assert_different_registers(temp2, rcx, rdx); |
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330 assert_different_registers(temp3, rcx, rdx); |
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331 } |
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332 #endif |
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333 assert_different_registers(temp1, temp2, temp3, receiver_reg); |
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334 assert_different_registers(temp1, temp2, temp3, member_reg); |
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335 if (!for_compiler_entry) |
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336 assert_different_registers(temp1, temp2, temp3, saved_last_sp_register()); // don't trash lastSP |
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337 |
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338 if (iid == vmIntrinsics::_invokeBasic) { |
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339 // indirect through MH.form.vmentry.vmtarget |
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340 jump_to_lambda_form(_masm, receiver_reg, rbx_method, temp1, for_compiler_entry); |
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341 |
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342 } else { |
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343 // The method is a member invoker used by direct method handles. |
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344 if (VerifyMethodHandles) { |
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345 // make sure the trailing argument really is a MemberName (caller responsibility) |
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346 verify_klass(_masm, member_reg, SystemDictionaryHandles::MemberName_klass(), |
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347 "MemberName required for invokeVirtual etc."); |
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348 } |
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349 |
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350 Address member_clazz( member_reg, NONZERO(java_lang_invoke_MemberName::clazz_offset_in_bytes())); |
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351 Address member_vmindex( member_reg, NONZERO(java_lang_invoke_MemberName::vmindex_offset_in_bytes())); |
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352 Address member_vmtarget( member_reg, NONZERO(java_lang_invoke_MemberName::vmtarget_offset_in_bytes())); |
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353 |
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354 Register temp1_recv_klass = temp1; |
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355 if (iid != vmIntrinsics::_linkToStatic) { |
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356 __ verify_oop(receiver_reg); |
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357 if (iid == vmIntrinsics::_linkToSpecial) { |
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358 // Don't actually load the klass; just null-check the receiver. |
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359 __ null_check(receiver_reg); |
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360 } else { |
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361 // load receiver klass itself |
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362 __ null_check(receiver_reg, oopDesc::klass_offset_in_bytes()); |
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363 __ load_klass(temp1_recv_klass, receiver_reg); |
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364 __ verify_oop(temp1_recv_klass); |
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365 } |
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366 BLOCK_COMMENT("check_receiver {"); |
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367 // The receiver for the MemberName must be in receiver_reg. |
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368 // Check the receiver against the MemberName.clazz |
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369 if (VerifyMethodHandles && iid == vmIntrinsics::_linkToSpecial) { |
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370 // Did not load it above... |
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371 __ load_klass(temp1_recv_klass, receiver_reg); |
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372 __ verify_oop(temp1_recv_klass); |
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373 } |
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374 if (VerifyMethodHandles && iid != vmIntrinsics::_linkToInterface) { |
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375 Label L_ok; |
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376 Register temp2_defc = temp2; |
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377 __ load_heap_oop(temp2_defc, member_clazz); |
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378 load_klass_from_Class(_masm, temp2_defc); |
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379 __ verify_oop(temp2_defc); |
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380 __ check_klass_subtype(temp1_recv_klass, temp2_defc, temp3, L_ok); |
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381 // If we get here, the type check failed! |
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382 __ STOP("receiver class disagrees with MemberName.clazz"); |
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383 __ bind(L_ok); |
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384 } |
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385 BLOCK_COMMENT("} check_receiver"); |
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386 } |
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387 if (iid == vmIntrinsics::_linkToSpecial || |
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388 iid == vmIntrinsics::_linkToStatic) { |
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389 DEBUG_ONLY(temp1_recv_klass = noreg); // these guys didn't load the recv_klass |
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390 } |
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391 |
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392 // Live registers at this point: |
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393 // member_reg - MemberName that was the trailing argument |
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394 // temp1_recv_klass - klass of stacked receiver, if needed |
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395 // rsi/r13 - interpreter linkage (if interpreted) |
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396 // rcx, rdx, rsi, rdi, r8, r8 - compiler arguments (if compiled) |
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397 |
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398 bool method_is_live = false; |
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399 switch (iid) { |
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400 case vmIntrinsics::_linkToSpecial: |
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|
401 if (VerifyMethodHandles) { |
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|
402 verify_ref_kind(_masm, JVM_REF_invokeSpecial, member_reg, temp3); |
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|
403 } |
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|
404 __ load_heap_oop(rbx_method, member_vmtarget); |
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|
405 method_is_live = true; |
1d7922586cf6
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|
406 break; |
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|
407 |
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|
408 case vmIntrinsics::_linkToStatic: |
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|
409 if (VerifyMethodHandles) { |
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|
410 verify_ref_kind(_masm, JVM_REF_invokeStatic, member_reg, temp3); |
1d7922586cf6
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|
411 } |
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|
412 __ load_heap_oop(rbx_method, member_vmtarget); |
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413 method_is_live = true; |
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|
414 break; |
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|
415 |
6266
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416 case vmIntrinsics::_linkToVirtual: |
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|
417 { |
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|
418 // same as TemplateTable::invokevirtual, |
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419 // minus the CP setup and profiling: |
1d7922586cf6
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changeset
|
420 |
1d7922586cf6
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|
421 if (VerifyMethodHandles) { |
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|
422 verify_ref_kind(_masm, JVM_REF_invokeVirtual, member_reg, temp3); |
1d7922586cf6
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|
423 } |
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|
424 |
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|
425 // pick out the vtable index from the MemberName, and then we can discard it: |
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|
426 Register temp2_index = temp2; |
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|
427 __ movptr(temp2_index, member_vmindex); |
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|
428 |
6266
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429 if (VerifyMethodHandles) { |
1d7922586cf6
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|
430 Label L_index_ok; |
1d7922586cf6
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|
431 __ cmpl(temp2_index, 0); |
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432 __ jcc(Assembler::greaterEqual, L_index_ok); |
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433 __ STOP("no virtual index"); |
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|
434 __ BIND(L_index_ok); |
1d7922586cf6
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|
435 } |
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|
436 |
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|
437 // Note: The verifier invariants allow us to ignore MemberName.clazz and vmtarget |
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438 // at this point. And VerifyMethodHandles has already checked clazz, if needed. |
1d7922586cf6
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|
439 |
1d7922586cf6
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changeset
|
440 // get target methodOop & entry point |
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|
441 __ lookup_virtual_method(temp1_recv_klass, temp2_index, rbx_method); |
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442 method_is_live = true; |
1d7922586cf6
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|
443 break; |
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parents:
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diff
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|
444 } |
6266
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|
445 |
1d7922586cf6
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|
446 case vmIntrinsics::_linkToInterface: |
1d7922586cf6
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|
447 { |
1d7922586cf6
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|
448 // same as TemplateTable::invokeinterface |
1d7922586cf6
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|
449 // (minus the CP setup and profiling, with different argument motion) |
1d7922586cf6
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|
450 if (VerifyMethodHandles) { |
1d7922586cf6
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|
451 verify_ref_kind(_masm, JVM_REF_invokeInterface, member_reg, temp3); |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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|
452 } |
1d7922586cf6
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diff
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|
453 |
1d7922586cf6
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|
454 Register temp3_intf = temp3; |
1d7922586cf6
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|
455 __ load_heap_oop(temp3_intf, member_clazz); |
1d7922586cf6
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|
456 load_klass_from_Class(_masm, temp3_intf); |
1d7922586cf6
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|
457 __ verify_oop(temp3_intf); |
1d7922586cf6
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|
458 |
1d7922586cf6
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|
459 Register rbx_index = rbx_method; |
1d7922586cf6
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|
460 __ movptr(rbx_index, member_vmindex); |
1d7922586cf6
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|
461 if (VerifyMethodHandles) { |
1d7922586cf6
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diff
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|
462 Label L; |
1d7922586cf6
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changeset
|
463 __ cmpl(rbx_index, 0); |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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|
464 __ jcc(Assembler::greaterEqual, L); |
1d7922586cf6
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|
465 __ STOP("invalid vtable index for MH.invokeInterface"); |
1d7922586cf6
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|
466 __ bind(L); |
1d7922586cf6
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|
467 } |
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|
468 |
6266
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|
469 // given intf, index, and recv klass, dispatch to the implementation method |
1d7922586cf6
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|
470 Label L_no_such_interface; |
1d7922586cf6
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|
471 __ lookup_interface_method(temp1_recv_klass, temp3_intf, |
1d7922586cf6
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|
472 // note: next two args must be the same: |
1d7922586cf6
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|
473 rbx_index, rbx_method, |
1d7922586cf6
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changeset
|
474 temp2, |
1d7922586cf6
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diff
changeset
|
475 L_no_such_interface); |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
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diff
changeset
|
476 |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
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diff
changeset
|
477 __ verify_oop(rbx_method); |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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|
478 jump_from_method_handle(_masm, rbx_method, temp2, for_compiler_entry); |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
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diff
changeset
|
479 __ hlt(); |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
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diff
changeset
|
480 |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
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diff
changeset
|
481 __ bind(L_no_such_interface); |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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changeset
|
482 __ jump(RuntimeAddress(StubRoutines::throw_IncompatibleClassChangeError_entry())); |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
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diff
changeset
|
483 break; |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
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diff
changeset
|
484 } |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
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diff
changeset
|
485 |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
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diff
changeset
|
486 default: |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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|
487 fatal(err_msg("unexpected intrinsic %d: %s", iid, vmIntrinsics::name_at(iid))); |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
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diff
changeset
|
488 break; |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
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diff
changeset
|
489 } |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
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diff
changeset
|
490 |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
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diff
changeset
|
491 if (method_is_live) { |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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diff
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|
492 // live at this point: rbx_method, rsi/r13 (if interpreted) |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
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diff
changeset
|
493 |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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diff
changeset
|
494 // After figuring out which concrete method to call, jump into it. |
1d7922586cf6
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|
495 // Note that this works in the interpreter with no data motion. |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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|
496 // But the compiled version will require that rcx_recv be shifted out. |
1d7922586cf6
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|
497 __ verify_oop(rbx_method); |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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diff
changeset
|
498 jump_from_method_handle(_masm, rbx_method, temp1, for_compiler_entry); |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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diff
changeset
|
499 } |
3363
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never
parents:
3336
diff
changeset
|
500 } |
167b70ff3abc
6939861: JVM should handle more conversion operations
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parents:
3336
diff
changeset
|
501 } |
167b70ff3abc
6939861: JVM should handle more conversion operations
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parents:
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diff
changeset
|
502 |
4824
5dbed2f542ff
7120468: SPARC/x86: use frame::describe to enhance trace_method_handle
bdelsart
parents:
4818
diff
changeset
|
503 #ifndef PRODUCT |
710 | 504 void trace_method_handle_stub(const char* adaptername, |
3363
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|
505 oop mh, |
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parents:
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diff
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|
506 intptr_t* saved_regs, |
4939
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7141329: Strange values of stack_size in -XX:+TraceMethodHandles output
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|
507 intptr_t* entry_sp) { |
710 | 508 // called as a leaf from native code: do not block the JVM! |
6266
1d7922586cf6
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|
509 bool has_mh = (strstr(adaptername, "/static") == NULL && |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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diff
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|
510 strstr(adaptername, "linkTo") == NULL); // static linkers don't have MH |
4939
45a1bf98f1bb
7141329: Strange values of stack_size in -XX:+TraceMethodHandles output
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|
511 const char* mh_reg_name = has_mh ? "rcx_mh" : "rcx"; |
6266
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|
512 tty->print_cr("MH %s %s="PTR_FORMAT" sp="PTR_FORMAT, |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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|
513 adaptername, mh_reg_name, |
1d7922586cf6
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|
514 mh, entry_sp); |
4824
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7120468: SPARC/x86: use frame::describe to enhance trace_method_handle
bdelsart
parents:
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diff
changeset
|
515 |
1793
d257356e35f0
6939224: MethodHandle.invokeGeneric needs to perform the correct set of conversions
jrose
parents:
1552
diff
changeset
|
516 if (Verbose) { |
4939
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7141329: Strange values of stack_size in -XX:+TraceMethodHandles output
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|
517 tty->print_cr("Registers:"); |
45a1bf98f1bb
7141329: Strange values of stack_size in -XX:+TraceMethodHandles output
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|
518 const int saved_regs_count = RegisterImpl::number_of_registers; |
45a1bf98f1bb
7141329: Strange values of stack_size in -XX:+TraceMethodHandles output
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|
519 for (int i = 0; i < saved_regs_count; i++) { |
45a1bf98f1bb
7141329: Strange values of stack_size in -XX:+TraceMethodHandles output
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|
520 Register r = as_Register(i); |
45a1bf98f1bb
7141329: Strange values of stack_size in -XX:+TraceMethodHandles output
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|
521 // The registers are stored in reverse order on the stack (by pusha). |
45a1bf98f1bb
7141329: Strange values of stack_size in -XX:+TraceMethodHandles output
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|
522 tty->print("%3s=" PTR_FORMAT, r->name(), saved_regs[((saved_regs_count - 1) - i)]); |
45a1bf98f1bb
7141329: Strange values of stack_size in -XX:+TraceMethodHandles output
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diff
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|
523 if ((i + 1) % 4 == 0) { |
3363
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parents:
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diff
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|
524 tty->cr(); |
4939
45a1bf98f1bb
7141329: Strange values of stack_size in -XX:+TraceMethodHandles output
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diff
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|
525 } else { |
45a1bf98f1bb
7141329: Strange values of stack_size in -XX:+TraceMethodHandles output
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diff
changeset
|
526 tty->print(", "); |
3363
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6939861: JVM should handle more conversion operations
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parents:
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diff
changeset
|
527 } |
167b70ff3abc
6939861: JVM should handle more conversion operations
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parents:
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diff
changeset
|
528 } |
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parents:
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diff
changeset
|
529 tty->cr(); |
4824
5dbed2f542ff
7120468: SPARC/x86: use frame::describe to enhance trace_method_handle
bdelsart
parents:
4818
diff
changeset
|
530 |
5dbed2f542ff
7120468: SPARC/x86: use frame::describe to enhance trace_method_handle
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531 { |
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532 // dumping last frame with frame::describe |
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533 |
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534 JavaThread* p = JavaThread::active(); |
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535 |
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536 ResourceMark rm; |
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537 PRESERVE_EXCEPTION_MARK; // may not be needed by safer and unexpensive here |
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538 FrameValues values; |
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539 |
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540 // Note: We want to allow trace_method_handle from any call site. |
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541 // While trace_method_handle creates a frame, it may be entered |
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542 // without a PC on the stack top (e.g. not just after a call). |
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543 // Walking that frame could lead to failures due to that invalid PC. |
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544 // => carefully detect that frame when doing the stack walking |
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545 |
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546 // Current C frame |
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547 frame cur_frame = os::current_frame(); |
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548 |
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549 // Robust search of trace_calling_frame (independant of inlining). |
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550 // Assumes saved_regs comes from a pusha in the trace_calling_frame. |
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551 assert(cur_frame.sp() < saved_regs, "registers not saved on stack ?"); |
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552 frame trace_calling_frame = os::get_sender_for_C_frame(&cur_frame); |
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553 while (trace_calling_frame.fp() < saved_regs) { |
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554 trace_calling_frame = os::get_sender_for_C_frame(&trace_calling_frame); |
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555 } |
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556 |
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557 // safely create a frame and call frame::describe |
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558 intptr_t *dump_sp = trace_calling_frame.sender_sp(); |
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559 intptr_t *dump_fp = trace_calling_frame.link(); |
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560 |
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561 bool walkable = has_mh; // whether the traced frame shoud be walkable |
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562 |
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563 if (walkable) { |
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564 // The previous definition of walkable may have to be refined |
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565 // if new call sites cause the next frame constructor to start |
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566 // failing. Alternatively, frame constructors could be |
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567 // modified to support the current or future non walkable |
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568 // frames (but this is more intrusive and is not considered as |
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569 // part of this RFE, which will instead use a simpler output). |
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570 frame dump_frame = frame(dump_sp, dump_fp); |
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571 dump_frame.describe(values, 1); |
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572 } else { |
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573 // Stack may not be walkable (invalid PC above FP): |
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574 // Add descriptions without building a Java frame to avoid issues |
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575 values.describe(-1, dump_fp, "fp for #1 <not parsed, cannot trust pc>"); |
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576 values.describe(-1, dump_sp, "sp for #1"); |
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577 } |
6266
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578 values.describe(-1, entry_sp, "raw top of stack"); |
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579 |
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580 tty->print_cr("Stack layout:"); |
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581 values.print(p); |
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582 } |
6266
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583 if (has_mh && mh->is_oop()) { |
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584 mh->print(); |
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585 if (java_lang_invoke_MethodHandle::is_instance(mh)) { |
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586 if (java_lang_invoke_MethodHandle::form_offset_in_bytes() != 0) |
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587 java_lang_invoke_MethodHandle::form(mh)->print(); |
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588 } |
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589 } |
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590 } |
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591 } |
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592 |
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593 // The stub wraps the arguments in a struct on the stack to avoid |
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594 // dealing with the different calling conventions for passing 6 |
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595 // arguments. |
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596 struct MethodHandleStubArguments { |
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597 const char* adaptername; |
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598 oopDesc* mh; |
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599 intptr_t* saved_regs; |
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600 intptr_t* entry_sp; |
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601 }; |
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602 void trace_method_handle_stub_wrapper(MethodHandleStubArguments* args) { |
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603 trace_method_handle_stub(args->adaptername, |
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604 args->mh, |
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605 args->saved_regs, |
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606 args->entry_sp); |
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607 } |
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608 |
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609 void MethodHandles::trace_method_handle(MacroAssembler* _masm, const char* adaptername) { |
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610 if (!TraceMethodHandles) return; |
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611 BLOCK_COMMENT("trace_method_handle {"); |
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612 __ enter(); |
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613 __ andptr(rsp, -16); // align stack if needed for FPU state |
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614 __ pusha(); |
4824
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615 __ mov(rbx, rsp); // for retreiving saved_regs |
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616 // Note: saved_regs must be in the entered frame for the |
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617 // robust stack walking implemented in trace_method_handle_stub. |
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618 |
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619 // save FP result, valid at some call sites (adapter_opt_return_float, ...) |
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620 __ increment(rsp, -2 * wordSize); |
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621 if (UseSSE >= 2) { |
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622 __ movdbl(Address(rsp, 0), xmm0); |
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623 } else if (UseSSE == 1) { |
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624 __ movflt(Address(rsp, 0), xmm0); |
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625 } else { |
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626 __ fst_d(Address(rsp, 0)); |
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627 } |
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|
628 |
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629 // Incoming state: |
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630 // rcx: method handle |
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631 // |
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632 // To avoid calling convention issues, build a record on the stack |
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633 // and pass the pointer to that instead. |
4824
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634 __ push(rbp); // entry_sp (with extra align space) |
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635 __ push(rbx); // pusha saved_regs |
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|
636 __ push(rcx); // mh |
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637 __ push(rcx); // slot for adaptername |
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638 __ movptr(Address(rsp, 0), (intptr_t) adaptername); |
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639 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, trace_method_handle_stub_wrapper), rsp); |
4939
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640 __ increment(rsp, sizeof(MethodHandleStubArguments)); |
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641 |
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642 if (UseSSE >= 2) { |
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643 __ movdbl(xmm0, Address(rsp, 0)); |
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644 } else if (UseSSE == 1) { |
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645 __ movflt(xmm0, Address(rsp, 0)); |
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646 } else { |
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647 __ fld_d(Address(rsp, 0)); |
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648 } |
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649 __ increment(rsp, 2 * wordSize); |
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650 |
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651 __ popa(); |
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652 __ leave(); |
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changeset
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653 BLOCK_COMMENT("} trace_method_handle"); |
710 | 654 } |
655 #endif //PRODUCT | |
656 |