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0
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1 /*
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2 * Copyright 1999-2007 Sun Microsystems, Inc. All Rights Reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 #include "incls/_precompiled.incl"
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26 #include "incls/_c1_Runtime1_x86.cpp.incl"
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27
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28
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29 // Implementation of StubAssembler
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30
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31 int StubAssembler::call_RT(Register oop_result1, Register oop_result2, address entry, int args_size) {
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32 // setup registers
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33 const Register thread = rdi; // is callee-saved register (Visual C++ calling conventions)
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34 assert(!(oop_result1->is_valid() || oop_result2->is_valid()) || oop_result1 != oop_result2, "registers must be different");
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35 assert(oop_result1 != thread && oop_result2 != thread, "registers must be different");
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36 assert(args_size >= 0, "illegal args_size");
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37
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38 set_num_rt_args(1 + args_size);
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39
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40 // push java thread (becomes first argument of C function)
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41 get_thread(thread);
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42 pushl(thread);
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43
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44 set_last_Java_frame(thread, noreg, rbp, NULL);
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45 // do the call
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46 call(RuntimeAddress(entry));
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47 int call_offset = offset();
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48 // verify callee-saved register
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49 #ifdef ASSERT
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50 guarantee(thread != rax, "change this code");
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51 pushl(rax);
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52 { Label L;
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53 get_thread(rax);
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54 cmpl(thread, rax);
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55 jcc(Assembler::equal, L);
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56 int3();
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57 stop("StubAssembler::call_RT: rdi not callee saved?");
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58 bind(L);
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59 }
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60 popl(rax);
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61 #endif
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62 reset_last_Java_frame(thread, true, false);
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63
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64 // discard thread and arguments
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65 addl(rsp, (1 + args_size)*BytesPerWord);
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66
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67 // check for pending exceptions
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68 { Label L;
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69 cmpl(Address(thread, Thread::pending_exception_offset()), NULL_WORD);
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70 jcc(Assembler::equal, L);
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71 // exception pending => remove activation and forward to exception handler
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72 movl(rax, Address(thread, Thread::pending_exception_offset()));
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73 // make sure that the vm_results are cleared
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74 if (oop_result1->is_valid()) {
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75 movl(Address(thread, JavaThread::vm_result_offset()), NULL_WORD);
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76 }
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77 if (oop_result2->is_valid()) {
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78 movl(Address(thread, JavaThread::vm_result_2_offset()), NULL_WORD);
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79 }
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80 if (frame_size() == no_frame_size) {
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81 leave();
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82 jump(RuntimeAddress(StubRoutines::forward_exception_entry()));
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83 } else if (_stub_id == Runtime1::forward_exception_id) {
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84 should_not_reach_here();
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85 } else {
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86 jump(RuntimeAddress(Runtime1::entry_for(Runtime1::forward_exception_id)));
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87 }
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88 bind(L);
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89 }
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90 // get oop results if there are any and reset the values in the thread
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91 if (oop_result1->is_valid()) {
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92 movl(oop_result1, Address(thread, JavaThread::vm_result_offset()));
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93 movl(Address(thread, JavaThread::vm_result_offset()), NULL_WORD);
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94 verify_oop(oop_result1);
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95 }
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96 if (oop_result2->is_valid()) {
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97 movl(oop_result2, Address(thread, JavaThread::vm_result_2_offset()));
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98 movl(Address(thread, JavaThread::vm_result_2_offset()), NULL_WORD);
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99 verify_oop(oop_result2);
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100 }
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101 return call_offset;
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102 }
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103
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104
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105 int StubAssembler::call_RT(Register oop_result1, Register oop_result2, address entry, Register arg1) {
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106 pushl(arg1);
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107 return call_RT(oop_result1, oop_result2, entry, 1);
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108 }
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109
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110
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111 int StubAssembler::call_RT(Register oop_result1, Register oop_result2, address entry, Register arg1, Register arg2) {
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112 pushl(arg2);
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113 pushl(arg1);
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114 return call_RT(oop_result1, oop_result2, entry, 2);
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115 }
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116
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117
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118 int StubAssembler::call_RT(Register oop_result1, Register oop_result2, address entry, Register arg1, Register arg2, Register arg3) {
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119 pushl(arg3);
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120 pushl(arg2);
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121 pushl(arg1);
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122 return call_RT(oop_result1, oop_result2, entry, 3);
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123 }
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124
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125
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126 // Implementation of StubFrame
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127
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128 class StubFrame: public StackObj {
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129 private:
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130 StubAssembler* _sasm;
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131
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132 public:
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133 StubFrame(StubAssembler* sasm, const char* name, bool must_gc_arguments);
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134 void load_argument(int offset_in_words, Register reg);
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135
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136 ~StubFrame();
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137 };
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138
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139
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140 #define __ _sasm->
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141
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142 StubFrame::StubFrame(StubAssembler* sasm, const char* name, bool must_gc_arguments) {
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143 _sasm = sasm;
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144 __ set_info(name, must_gc_arguments);
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145 __ enter();
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146 }
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147
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148 // load parameters that were stored with LIR_Assembler::store_parameter
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149 // Note: offsets for store_parameter and load_argument must match
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150 void StubFrame::load_argument(int offset_in_words, Register reg) {
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151 // rbp, + 0: link
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152 // + 1: return address
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153 // + 2: argument with offset 0
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154 // + 3: argument with offset 1
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155 // + 4: ...
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156
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157 __ movl(reg, Address(rbp, (offset_in_words + 2) * BytesPerWord));
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158 }
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159
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160
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161 StubFrame::~StubFrame() {
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162 __ leave();
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163 __ ret(0);
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164 }
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165
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166 #undef __
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167
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168
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169 // Implementation of Runtime1
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170
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171 #define __ sasm->
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172
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173 const int float_regs_as_doubles_size_in_words = 16;
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174 const int xmm_regs_as_doubles_size_in_words = 16;
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175
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176 // Stack layout for saving/restoring all the registers needed during a runtime
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177 // call (this includes deoptimization)
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178 // Note: note that users of this frame may well have arguments to some runtime
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179 // while these values are on the stack. These positions neglect those arguments
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180 // but the code in save_live_registers will take the argument count into
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181 // account.
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182 //
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183 enum reg_save_layout {
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184 dummy1,
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185 dummy2,
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186 // Two temps to be used as needed by users of save/restore callee registers
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187 temp_2_off,
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188 temp_1_off,
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189 xmm_regs_as_doubles_off,
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190 float_regs_as_doubles_off = xmm_regs_as_doubles_off + xmm_regs_as_doubles_size_in_words,
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191 fpu_state_off = float_regs_as_doubles_off + float_regs_as_doubles_size_in_words,
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192 fpu_state_end_off = fpu_state_off + FPUStateSizeInWords,
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193 marker = fpu_state_end_off,
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194 extra_space_offset,
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195 rdi_off = extra_space_offset,
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196 rsi_off,
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197 rbp_off,
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198 rsp_off,
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199 rbx_off,
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200 rdx_off,
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201 rcx_off,
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202 rax_off,
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203 saved_rbp_off,
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204 return_off,
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205 reg_save_frame_size, // As noted: neglects any parameters to runtime
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206
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207 // equates
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208
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209 // illegal instruction handler
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210 continue_dest_off = temp_1_off,
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211
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212 // deoptimization equates
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213 fp0_off = float_regs_as_doubles_off, // slot for java float/double return value
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214 xmm0_off = xmm_regs_as_doubles_off, // slot for java float/double return value
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215 deopt_type = temp_2_off, // slot for type of deopt in progress
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216 ret_type = temp_1_off // slot for return type
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217 };
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218
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219
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220
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221 // Save off registers which might be killed by calls into the runtime.
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222 // Tries to smart of about FP registers. In particular we separate
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223 // saving and describing the FPU registers for deoptimization since we
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224 // have to save the FPU registers twice if we describe them and on P4
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225 // saving FPU registers which don't contain anything appears
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226 // expensive. The deopt blob is the only thing which needs to
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227 // describe FPU registers. In all other cases it should be sufficient
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228 // to simply save their current value.
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229
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230 static OopMap* generate_oop_map(StubAssembler* sasm, int num_rt_args,
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231 bool save_fpu_registers = true) {
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232 int frame_size = reg_save_frame_size + num_rt_args; // args + thread
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233 sasm->set_frame_size(frame_size);
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234
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235 // record saved value locations in an OopMap
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236 // locations are offsets from sp after runtime call; num_rt_args is number of arguments in call, including thread
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237 OopMap* map = new OopMap(frame_size, 0);
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238 map->set_callee_saved(VMRegImpl::stack2reg(rax_off + num_rt_args), rax->as_VMReg());
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239 map->set_callee_saved(VMRegImpl::stack2reg(rcx_off + num_rt_args), rcx->as_VMReg());
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240 map->set_callee_saved(VMRegImpl::stack2reg(rdx_off + num_rt_args), rdx->as_VMReg());
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241 map->set_callee_saved(VMRegImpl::stack2reg(rbx_off + num_rt_args), rbx->as_VMReg());
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242 map->set_callee_saved(VMRegImpl::stack2reg(rsi_off + num_rt_args), rsi->as_VMReg());
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243 map->set_callee_saved(VMRegImpl::stack2reg(rdi_off + num_rt_args), rdi->as_VMReg());
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244
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245 if (save_fpu_registers) {
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246 if (UseSSE < 2) {
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247 int fpu_off = float_regs_as_doubles_off;
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248 for (int n = 0; n < FrameMap::nof_fpu_regs; n++) {
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249 VMReg fpu_name_0 = FrameMap::fpu_regname(n);
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250 map->set_callee_saved(VMRegImpl::stack2reg(fpu_off + num_rt_args), fpu_name_0);
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251 // %%% This is really a waste but we'll keep things as they were for now
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252 if (true) {
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253 map->set_callee_saved(VMRegImpl::stack2reg(fpu_off + 1 + num_rt_args), fpu_name_0->next());
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254 }
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255 fpu_off += 2;
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256 }
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257 assert(fpu_off == fpu_state_off, "incorrect number of fpu stack slots");
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258 }
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259
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260 if (UseSSE >= 2) {
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261 int xmm_off = xmm_regs_as_doubles_off;
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262 for (int n = 0; n < FrameMap::nof_xmm_regs; n++) {
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263 VMReg xmm_name_0 = as_XMMRegister(n)->as_VMReg();
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264 map->set_callee_saved(VMRegImpl::stack2reg(xmm_off + num_rt_args), xmm_name_0);
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265 // %%% This is really a waste but we'll keep things as they were for now
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266 if (true) {
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267 map->set_callee_saved(VMRegImpl::stack2reg(xmm_off + 1 + num_rt_args), xmm_name_0->next());
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268 }
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269 xmm_off += 2;
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270 }
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271 assert(xmm_off == float_regs_as_doubles_off, "incorrect number of xmm registers");
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272
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273 } else if (UseSSE == 1) {
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274 int xmm_off = xmm_regs_as_doubles_off;
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275 for (int n = 0; n < FrameMap::nof_xmm_regs; n++) {
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276 VMReg xmm_name_0 = as_XMMRegister(n)->as_VMReg();
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277 map->set_callee_saved(VMRegImpl::stack2reg(xmm_off + num_rt_args), xmm_name_0);
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278 xmm_off += 2;
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279 }
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280 assert(xmm_off == float_regs_as_doubles_off, "incorrect number of xmm registers");
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281 }
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282 }
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283
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284 return map;
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285 }
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286
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287 static OopMap* save_live_registers(StubAssembler* sasm, int num_rt_args,
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288 bool save_fpu_registers = true) {
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289 __ block_comment("save_live_registers");
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290
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291 int frame_size = reg_save_frame_size + num_rt_args; // args + thread
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292 // frame_size = round_to(frame_size, 4);
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293 sasm->set_frame_size(frame_size);
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294
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295 __ pushad(); // integer registers
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296
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297 // assert(float_regs_as_doubles_off % 2 == 0, "misaligned offset");
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298 // assert(xmm_regs_as_doubles_off % 2 == 0, "misaligned offset");
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299
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300 __ subl(rsp, extra_space_offset * wordSize);
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301
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302 #ifdef ASSERT
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303 __ movl(Address(rsp, marker * wordSize), 0xfeedbeef);
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304 #endif
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305
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306 if (save_fpu_registers) {
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307 if (UseSSE < 2) {
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308 // save FPU stack
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309 __ fnsave(Address(rsp, fpu_state_off * wordSize));
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310 __ fwait();
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311
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312 #ifdef ASSERT
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313 Label ok;
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314 __ cmpw(Address(rsp, fpu_state_off * wordSize), StubRoutines::fpu_cntrl_wrd_std());
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315 __ jccb(Assembler::equal, ok);
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316 __ stop("corrupted control word detected");
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317 __ bind(ok);
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318 #endif
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319
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320 // Reset the control word to guard against exceptions being unmasked
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321 // since fstp_d can cause FPU stack underflow exceptions. Write it
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322 // into the on stack copy and then reload that to make sure that the
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323 // current and future values are correct.
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324 __ movw(Address(rsp, fpu_state_off * wordSize), StubRoutines::fpu_cntrl_wrd_std());
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325 __ frstor(Address(rsp, fpu_state_off * wordSize));
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326
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327 // Save the FPU registers in de-opt-able form
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328 __ fstp_d(Address(rsp, float_regs_as_doubles_off * BytesPerWord + 0));
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329 __ fstp_d(Address(rsp, float_regs_as_doubles_off * BytesPerWord + 8));
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330 __ fstp_d(Address(rsp, float_regs_as_doubles_off * BytesPerWord + 16));
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331 __ fstp_d(Address(rsp, float_regs_as_doubles_off * BytesPerWord + 24));
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332 __ fstp_d(Address(rsp, float_regs_as_doubles_off * BytesPerWord + 32));
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333 __ fstp_d(Address(rsp, float_regs_as_doubles_off * BytesPerWord + 40));
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334 __ fstp_d(Address(rsp, float_regs_as_doubles_off * BytesPerWord + 48));
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335 __ fstp_d(Address(rsp, float_regs_as_doubles_off * BytesPerWord + 56));
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336 }
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337
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338 if (UseSSE >= 2) {
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339 // save XMM registers
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340 // XMM registers can contain float or double values, but this is not known here,
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341 // so always save them as doubles.
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342 // note that float values are _not_ converted automatically, so for float values
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343 // the second word contains only garbage data.
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344 __ movdbl(Address(rsp, xmm_regs_as_doubles_off * wordSize + 0), xmm0);
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345 __ movdbl(Address(rsp, xmm_regs_as_doubles_off * wordSize + 8), xmm1);
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346 __ movdbl(Address(rsp, xmm_regs_as_doubles_off * wordSize + 16), xmm2);
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347 __ movdbl(Address(rsp, xmm_regs_as_doubles_off * wordSize + 24), xmm3);
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348 __ movdbl(Address(rsp, xmm_regs_as_doubles_off * wordSize + 32), xmm4);
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349 __ movdbl(Address(rsp, xmm_regs_as_doubles_off * wordSize + 40), xmm5);
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350 __ movdbl(Address(rsp, xmm_regs_as_doubles_off * wordSize + 48), xmm6);
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351 __ movdbl(Address(rsp, xmm_regs_as_doubles_off * wordSize + 56), xmm7);
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352 } else if (UseSSE == 1) {
|
|
|
353 // save XMM registers as float because double not supported without SSE2
|
|
|
354 __ movflt(Address(rsp, xmm_regs_as_doubles_off * wordSize + 0), xmm0);
|
|
|
355 __ movflt(Address(rsp, xmm_regs_as_doubles_off * wordSize + 8), xmm1);
|
|
|
356 __ movflt(Address(rsp, xmm_regs_as_doubles_off * wordSize + 16), xmm2);
|
|
|
357 __ movflt(Address(rsp, xmm_regs_as_doubles_off * wordSize + 24), xmm3);
|
|
|
358 __ movflt(Address(rsp, xmm_regs_as_doubles_off * wordSize + 32), xmm4);
|
|
|
359 __ movflt(Address(rsp, xmm_regs_as_doubles_off * wordSize + 40), xmm5);
|
|
|
360 __ movflt(Address(rsp, xmm_regs_as_doubles_off * wordSize + 48), xmm6);
|
|
|
361 __ movflt(Address(rsp, xmm_regs_as_doubles_off * wordSize + 56), xmm7);
|
|
|
362 }
|
|
|
363 }
|
|
|
364
|
|
|
365 // FPU stack must be empty now
|
|
|
366 __ verify_FPU(0, "save_live_registers");
|
|
|
367
|
|
|
368 return generate_oop_map(sasm, num_rt_args, save_fpu_registers);
|
|
|
369 }
|
|
|
370
|
|
|
371
|
|
|
372 static void restore_fpu(StubAssembler* sasm, bool restore_fpu_registers = true) {
|
|
|
373 if (restore_fpu_registers) {
|
|
|
374 if (UseSSE >= 2) {
|
|
|
375 // restore XMM registers
|
|
|
376 __ movdbl(xmm0, Address(rsp, xmm_regs_as_doubles_off * wordSize + 0));
|
|
|
377 __ movdbl(xmm1, Address(rsp, xmm_regs_as_doubles_off * wordSize + 8));
|
|
|
378 __ movdbl(xmm2, Address(rsp, xmm_regs_as_doubles_off * wordSize + 16));
|
|
|
379 __ movdbl(xmm3, Address(rsp, xmm_regs_as_doubles_off * wordSize + 24));
|
|
|
380 __ movdbl(xmm4, Address(rsp, xmm_regs_as_doubles_off * wordSize + 32));
|
|
|
381 __ movdbl(xmm5, Address(rsp, xmm_regs_as_doubles_off * wordSize + 40));
|
|
|
382 __ movdbl(xmm6, Address(rsp, xmm_regs_as_doubles_off * wordSize + 48));
|
|
|
383 __ movdbl(xmm7, Address(rsp, xmm_regs_as_doubles_off * wordSize + 56));
|
|
|
384 } else if (UseSSE == 1) {
|
|
|
385 // restore XMM registers
|
|
|
386 __ movflt(xmm0, Address(rsp, xmm_regs_as_doubles_off * wordSize + 0));
|
|
|
387 __ movflt(xmm1, Address(rsp, xmm_regs_as_doubles_off * wordSize + 8));
|
|
|
388 __ movflt(xmm2, Address(rsp, xmm_regs_as_doubles_off * wordSize + 16));
|
|
|
389 __ movflt(xmm3, Address(rsp, xmm_regs_as_doubles_off * wordSize + 24));
|
|
|
390 __ movflt(xmm4, Address(rsp, xmm_regs_as_doubles_off * wordSize + 32));
|
|
|
391 __ movflt(xmm5, Address(rsp, xmm_regs_as_doubles_off * wordSize + 40));
|
|
|
392 __ movflt(xmm6, Address(rsp, xmm_regs_as_doubles_off * wordSize + 48));
|
|
|
393 __ movflt(xmm7, Address(rsp, xmm_regs_as_doubles_off * wordSize + 56));
|
|
|
394 }
|
|
|
395
|
|
|
396 if (UseSSE < 2) {
|
|
|
397 __ frstor(Address(rsp, fpu_state_off * wordSize));
|
|
|
398 } else {
|
|
|
399 // check that FPU stack is really empty
|
|
|
400 __ verify_FPU(0, "restore_live_registers");
|
|
|
401 }
|
|
|
402
|
|
|
403 } else {
|
|
|
404 // check that FPU stack is really empty
|
|
|
405 __ verify_FPU(0, "restore_live_registers");
|
|
|
406 }
|
|
|
407
|
|
|
408 #ifdef ASSERT
|
|
|
409 {
|
|
|
410 Label ok;
|
|
|
411 __ cmpl(Address(rsp, marker * wordSize), 0xfeedbeef);
|
|
|
412 __ jcc(Assembler::equal, ok);
|
|
|
413 __ stop("bad offsets in frame");
|
|
|
414 __ bind(ok);
|
|
|
415 }
|
|
|
416 #endif
|
|
|
417
|
|
|
418 __ addl(rsp, extra_space_offset * wordSize);
|
|
|
419 }
|
|
|
420
|
|
|
421
|
|
|
422 static void restore_live_registers(StubAssembler* sasm, bool restore_fpu_registers = true) {
|
|
|
423 __ block_comment("restore_live_registers");
|
|
|
424
|
|
|
425 restore_fpu(sasm, restore_fpu_registers);
|
|
|
426 __ popad();
|
|
|
427 }
|
|
|
428
|
|
|
429
|
|
|
430 static void restore_live_registers_except_rax(StubAssembler* sasm, bool restore_fpu_registers = true) {
|
|
|
431 __ block_comment("restore_live_registers_except_rax");
|
|
|
432
|
|
|
433 restore_fpu(sasm, restore_fpu_registers);
|
|
|
434
|
|
|
435 __ popl(rdi);
|
|
|
436 __ popl(rsi);
|
|
|
437 __ popl(rbp);
|
|
|
438 __ popl(rbx); // skip this value
|
|
|
439 __ popl(rbx);
|
|
|
440 __ popl(rdx);
|
|
|
441 __ popl(rcx);
|
|
|
442 __ addl(rsp, 4);
|
|
|
443 }
|
|
|
444
|
|
|
445
|
|
|
446 void Runtime1::initialize_pd() {
|
|
|
447 // nothing to do
|
|
|
448 }
|
|
|
449
|
|
|
450
|
|
|
451 // target: the entry point of the method that creates and posts the exception oop
|
|
|
452 // has_argument: true if the exception needs an argument (passed on stack because registers must be preserved)
|
|
|
453
|
|
|
454 OopMapSet* Runtime1::generate_exception_throw(StubAssembler* sasm, address target, bool has_argument) {
|
|
|
455 // preserve all registers
|
|
|
456 int num_rt_args = has_argument ? 2 : 1;
|
|
|
457 OopMap* oop_map = save_live_registers(sasm, num_rt_args);
|
|
|
458
|
|
|
459 // now all registers are saved and can be used freely
|
|
|
460 // verify that no old value is used accidentally
|
|
|
461 __ invalidate_registers(true, true, true, true, true, true);
|
|
|
462
|
|
|
463 // registers used by this stub
|
|
|
464 const Register temp_reg = rbx;
|
|
|
465
|
|
|
466 // load argument for exception that is passed as an argument into the stub
|
|
|
467 if (has_argument) {
|
|
|
468 __ movl(temp_reg, Address(rbp, 2*BytesPerWord));
|
|
|
469 __ pushl(temp_reg);
|
|
|
470 }
|
|
|
471
|
|
|
472 int call_offset = __ call_RT(noreg, noreg, target, num_rt_args - 1);
|
|
|
473
|
|
|
474 OopMapSet* oop_maps = new OopMapSet();
|
|
|
475 oop_maps->add_gc_map(call_offset, oop_map);
|
|
|
476
|
|
|
477 __ stop("should not reach here");
|
|
|
478
|
|
|
479 return oop_maps;
|
|
|
480 }
|
|
|
481
|
|
|
482
|
|
|
483 void Runtime1::generate_handle_exception(StubAssembler *sasm, OopMapSet* oop_maps, OopMap* oop_map, bool save_fpu_registers) {
|
|
|
484 // incoming parameters
|
|
|
485 const Register exception_oop = rax;
|
|
|
486 const Register exception_pc = rdx;
|
|
|
487 // other registers used in this stub
|
|
|
488 const Register real_return_addr = rbx;
|
|
|
489 const Register thread = rdi;
|
|
|
490
|
|
|
491 __ block_comment("generate_handle_exception");
|
|
|
492
|
|
|
493 #ifdef TIERED
|
|
|
494 // C2 can leave the fpu stack dirty
|
|
|
495 if (UseSSE < 2 ) {
|
|
|
496 __ empty_FPU_stack();
|
|
|
497 }
|
|
|
498 #endif // TIERED
|
|
|
499
|
|
|
500 // verify that only rax, and rdx is valid at this time
|
|
|
501 __ invalidate_registers(false, true, true, false, true, true);
|
|
|
502 // verify that rax, contains a valid exception
|
|
|
503 __ verify_not_null_oop(exception_oop);
|
|
|
504
|
|
|
505 // load address of JavaThread object for thread-local data
|
|
|
506 __ get_thread(thread);
|
|
|
507
|
|
|
508 #ifdef ASSERT
|
|
|
509 // check that fields in JavaThread for exception oop and issuing pc are
|
|
|
510 // empty before writing to them
|
|
|
511 Label oop_empty;
|
|
|
512 __ cmpl(Address(thread, JavaThread::exception_oop_offset()), 0);
|
|
|
513 __ jcc(Assembler::equal, oop_empty);
|
|
|
514 __ stop("exception oop already set");
|
|
|
515 __ bind(oop_empty);
|
|
|
516
|
|
|
517 Label pc_empty;
|
|
|
518 __ cmpl(Address(thread, JavaThread::exception_pc_offset()), 0);
|
|
|
519 __ jcc(Assembler::equal, pc_empty);
|
|
|
520 __ stop("exception pc already set");
|
|
|
521 __ bind(pc_empty);
|
|
|
522 #endif
|
|
|
523
|
|
|
524 // save exception oop and issuing pc into JavaThread
|
|
|
525 // (exception handler will load it from here)
|
|
|
526 __ movl(Address(thread, JavaThread::exception_oop_offset()), exception_oop);
|
|
|
527 __ movl(Address(thread, JavaThread::exception_pc_offset()), exception_pc);
|
|
|
528
|
|
|
529 // save real return address (pc that called this stub)
|
|
|
530 __ movl(real_return_addr, Address(rbp, 1*BytesPerWord));
|
|
|
531 __ movl(Address(rsp, temp_1_off * BytesPerWord), real_return_addr);
|
|
|
532
|
|
|
533 // patch throwing pc into return address (has bci & oop map)
|
|
|
534 __ movl(Address(rbp, 1*BytesPerWord), exception_pc);
|
|
|
535
|
|
|
536 // compute the exception handler.
|
|
|
537 // the exception oop and the throwing pc are read from the fields in JavaThread
|
|
|
538 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, exception_handler_for_pc));
|
|
|
539 oop_maps->add_gc_map(call_offset, oop_map);
|
|
|
540
|
|
|
541 // rax,: handler address or NULL if no handler exists
|
|
|
542 // will be the deopt blob if nmethod was deoptimized while we looked up
|
|
|
543 // handler regardless of whether handler existed in the nmethod.
|
|
|
544
|
|
|
545 // only rax, is valid at this time, all other registers have been destroyed by the runtime call
|
|
|
546 __ invalidate_registers(false, true, true, true, true, true);
|
|
|
547
|
|
|
548 // Do we have an exception handler in the nmethod?
|
|
|
549 Label no_handler;
|
|
|
550 Label done;
|
|
|
551 __ testl(rax, rax);
|
|
|
552 __ jcc(Assembler::zero, no_handler);
|
|
|
553
|
|
|
554 // exception handler found
|
|
|
555 // patch the return address -> the stub will directly return to the exception handler
|
|
|
556 __ movl(Address(rbp, 1*BytesPerWord), rax);
|
|
|
557
|
|
|
558 // restore registers
|
|
|
559 restore_live_registers(sasm, save_fpu_registers);
|
|
|
560
|
|
|
561 // return to exception handler
|
|
|
562 __ leave();
|
|
|
563 __ ret(0);
|
|
|
564
|
|
|
565 __ bind(no_handler);
|
|
|
566 // no exception handler found in this method, so the exception is
|
|
|
567 // forwarded to the caller (using the unwind code of the nmethod)
|
|
|
568 // there is no need to restore the registers
|
|
|
569
|
|
|
570 // restore the real return address that was saved before the RT-call
|
|
|
571 __ movl(real_return_addr, Address(rsp, temp_1_off * BytesPerWord));
|
|
|
572 __ movl(Address(rbp, 1*BytesPerWord), real_return_addr);
|
|
|
573
|
|
|
574 // load address of JavaThread object for thread-local data
|
|
|
575 __ get_thread(thread);
|
|
|
576 // restore exception oop into rax, (convention for unwind code)
|
|
|
577 __ movl(exception_oop, Address(thread, JavaThread::exception_oop_offset()));
|
|
|
578
|
|
|
579 // clear exception fields in JavaThread because they are no longer needed
|
|
|
580 // (fields must be cleared because they are processed by GC otherwise)
|
|
|
581 __ movl(Address(thread, JavaThread::exception_oop_offset()), NULL_WORD);
|
|
|
582 __ movl(Address(thread, JavaThread::exception_pc_offset()), NULL_WORD);
|
|
|
583
|
|
|
584 // pop the stub frame off
|
|
|
585 __ leave();
|
|
|
586
|
|
|
587 generate_unwind_exception(sasm);
|
|
|
588 __ stop("should not reach here");
|
|
|
589 }
|
|
|
590
|
|
|
591
|
|
|
592 void Runtime1::generate_unwind_exception(StubAssembler *sasm) {
|
|
|
593 // incoming parameters
|
|
|
594 const Register exception_oop = rax;
|
|
|
595 // other registers used in this stub
|
|
|
596 const Register exception_pc = rdx;
|
|
|
597 const Register handler_addr = rbx;
|
|
|
598 const Register thread = rdi;
|
|
|
599
|
|
|
600 // verify that only rax, is valid at this time
|
|
|
601 __ invalidate_registers(false, true, true, true, true, true);
|
|
|
602
|
|
|
603 #ifdef ASSERT
|
|
|
604 // check that fields in JavaThread for exception oop and issuing pc are empty
|
|
|
605 __ get_thread(thread);
|
|
|
606 Label oop_empty;
|
|
|
607 __ cmpl(Address(thread, JavaThread::exception_oop_offset()), 0);
|
|
|
608 __ jcc(Assembler::equal, oop_empty);
|
|
|
609 __ stop("exception oop must be empty");
|
|
|
610 __ bind(oop_empty);
|
|
|
611
|
|
|
612 Label pc_empty;
|
|
|
613 __ cmpl(Address(thread, JavaThread::exception_pc_offset()), 0);
|
|
|
614 __ jcc(Assembler::equal, pc_empty);
|
|
|
615 __ stop("exception pc must be empty");
|
|
|
616 __ bind(pc_empty);
|
|
|
617 #endif
|
|
|
618
|
|
|
619 // clear the FPU stack in case any FPU results are left behind
|
|
|
620 __ empty_FPU_stack();
|
|
|
621
|
|
|
622 // leave activation of nmethod
|
|
|
623 __ leave();
|
|
|
624 // store return address (is on top of stack after leave)
|
|
|
625 __ movl(exception_pc, Address(rsp, 0));
|
|
|
626
|
|
|
627 __ verify_oop(exception_oop);
|
|
|
628
|
|
|
629 // save exception oop from rax, to stack before call
|
|
|
630 __ pushl(exception_oop);
|
|
|
631
|
|
|
632 // search the exception handler address of the caller (using the return address)
|
|
|
633 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), exception_pc);
|
|
|
634 // rax,: exception handler address of the caller
|
|
|
635
|
|
|
636 // only rax, is valid at this time, all other registers have been destroyed by the call
|
|
|
637 __ invalidate_registers(false, true, true, true, true, true);
|
|
|
638
|
|
|
639 // move result of call into correct register
|
|
|
640 __ movl(handler_addr, rax);
|
|
|
641
|
|
|
642 // restore exception oop in rax, (required convention of exception handler)
|
|
|
643 __ popl(exception_oop);
|
|
|
644
|
|
|
645 __ verify_oop(exception_oop);
|
|
|
646
|
|
|
647 // get throwing pc (= return address).
|
|
|
648 // rdx has been destroyed by the call, so it must be set again
|
|
|
649 // the pop is also necessary to simulate the effect of a ret(0)
|
|
|
650 __ popl(exception_pc);
|
|
|
651
|
|
|
652 // verify that that there is really a valid exception in rax,
|
|
|
653 __ verify_not_null_oop(exception_oop);
|
|
|
654
|
|
|
655 // continue at exception handler (return address removed)
|
|
|
656 // note: do *not* remove arguments when unwinding the
|
|
|
657 // activation since the caller assumes having
|
|
|
658 // all arguments on the stack when entering the
|
|
|
659 // runtime to determine the exception handler
|
|
|
660 // (GC happens at call site with arguments!)
|
|
|
661 // rax,: exception oop
|
|
|
662 // rdx: throwing pc
|
|
|
663 // rbx,: exception handler
|
|
|
664 __ jmp(handler_addr);
|
|
|
665 }
|
|
|
666
|
|
|
667
|
|
|
668 OopMapSet* Runtime1::generate_patching(StubAssembler* sasm, address target) {
|
|
|
669 // use the maximum number of runtime-arguments here because it is difficult to
|
|
|
670 // distinguish each RT-Call.
|
|
|
671 // Note: This number affects also the RT-Call in generate_handle_exception because
|
|
|
672 // the oop-map is shared for all calls.
|
|
|
673 const int num_rt_args = 2; // thread + dummy
|
|
|
674
|
|
|
675 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
|
|
|
676 assert(deopt_blob != NULL, "deoptimization blob must have been created");
|
|
|
677
|
|
|
678 OopMap* oop_map = save_live_registers(sasm, num_rt_args);
|
|
|
679
|
|
|
680 __ pushl(rax); // push dummy
|
|
|
681
|
|
|
682 const Register thread = rdi; // is callee-saved register (Visual C++ calling conventions)
|
|
|
683 // push java thread (becomes first argument of C function)
|
|
|
684 __ get_thread(thread);
|
|
|
685 __ pushl(thread);
|
|
|
686 __ set_last_Java_frame(thread, noreg, rbp, NULL);
|
|
|
687 // do the call
|
|
|
688 __ call(RuntimeAddress(target));
|
|
|
689 OopMapSet* oop_maps = new OopMapSet();
|
|
|
690 oop_maps->add_gc_map(__ offset(), oop_map);
|
|
|
691 // verify callee-saved register
|
|
|
692 #ifdef ASSERT
|
|
|
693 guarantee(thread != rax, "change this code");
|
|
|
694 __ pushl(rax);
|
|
|
695 { Label L;
|
|
|
696 __ get_thread(rax);
|
|
|
697 __ cmpl(thread, rax);
|
|
|
698 __ jcc(Assembler::equal, L);
|
|
|
699 __ stop("StubAssembler::call_RT: rdi not callee saved?");
|
|
|
700 __ bind(L);
|
|
|
701 }
|
|
|
702 __ popl(rax);
|
|
|
703 #endif
|
|
|
704 __ reset_last_Java_frame(thread, true, false);
|
|
|
705 __ popl(rcx); // discard thread arg
|
|
|
706 __ popl(rcx); // discard dummy
|
|
|
707
|
|
|
708 // check for pending exceptions
|
|
|
709 { Label L;
|
|
|
710 __ cmpl(Address(thread, Thread::pending_exception_offset()), NULL_WORD);
|
|
|
711 __ jcc(Assembler::equal, L);
|
|
|
712 // exception pending => remove activation and forward to exception handler
|
|
|
713
|
|
|
714 __ testl(rax, rax); // have we deoptimized?
|
|
|
715 __ jump_cc(Assembler::equal,
|
|
|
716 RuntimeAddress(Runtime1::entry_for(Runtime1::forward_exception_id)));
|
|
|
717
|
|
|
718 // the deopt blob expects exceptions in the special fields of
|
|
|
719 // JavaThread, so copy and clear pending exception.
|
|
|
720
|
|
|
721 // load and clear pending exception
|
|
|
722 __ movl(rax, Address(thread, Thread::pending_exception_offset()));
|
|
|
723 __ movl(Address(thread, Thread::pending_exception_offset()), NULL_WORD);
|
|
|
724
|
|
|
725 // check that there is really a valid exception
|
|
|
726 __ verify_not_null_oop(rax);
|
|
|
727
|
|
|
728 // load throwing pc: this is the return address of the stub
|
|
|
729 __ movl(rdx, Address(rsp, return_off * BytesPerWord));
|
|
|
730
|
|
|
731 #ifdef ASSERT
|
|
|
732 // check that fields in JavaThread for exception oop and issuing pc are empty
|
|
|
733 Label oop_empty;
|
|
|
734 __ cmpoop(Address(thread, JavaThread::exception_oop_offset()), 0);
|
|
|
735 __ jcc(Assembler::equal, oop_empty);
|
|
|
736 __ stop("exception oop must be empty");
|
|
|
737 __ bind(oop_empty);
|
|
|
738
|
|
|
739 Label pc_empty;
|
|
|
740 __ cmpl(Address(thread, JavaThread::exception_pc_offset()), 0);
|
|
|
741 __ jcc(Assembler::equal, pc_empty);
|
|
|
742 __ stop("exception pc must be empty");
|
|
|
743 __ bind(pc_empty);
|
|
|
744 #endif
|
|
|
745
|
|
|
746 // store exception oop and throwing pc to JavaThread
|
|
|
747 __ movl(Address(thread, JavaThread::exception_oop_offset()), rax);
|
|
|
748 __ movl(Address(thread, JavaThread::exception_pc_offset()), rdx);
|
|
|
749
|
|
|
750 restore_live_registers(sasm);
|
|
|
751
|
|
|
752 __ leave();
|
|
|
753 __ addl(rsp, 4); // remove return address from stack
|
|
|
754
|
|
|
755 // Forward the exception directly to deopt blob. We can blow no
|
|
|
756 // registers and must leave throwing pc on the stack. A patch may
|
|
|
757 // have values live in registers so the entry point with the
|
|
|
758 // exception in tls.
|
|
|
759 __ jump(RuntimeAddress(deopt_blob->unpack_with_exception_in_tls()));
|
|
|
760
|
|
|
761 __ bind(L);
|
|
|
762 }
|
|
|
763
|
|
|
764
|
|
|
765 // Runtime will return true if the nmethod has been deoptimized during
|
|
|
766 // the patching process. In that case we must do a deopt reexecute instead.
|
|
|
767
|
|
|
768 Label reexecuteEntry, cont;
|
|
|
769
|
|
|
770 __ testl(rax, rax); // have we deoptimized?
|
|
|
771 __ jcc(Assembler::equal, cont); // no
|
|
|
772
|
|
|
773 // Will reexecute. Proper return address is already on the stack we just restore
|
|
|
774 // registers, pop all of our frame but the return address and jump to the deopt blob
|
|
|
775 restore_live_registers(sasm);
|
|
|
776 __ leave();
|
|
|
777 __ jump(RuntimeAddress(deopt_blob->unpack_with_reexecution()));
|
|
|
778
|
|
|
779 __ bind(cont);
|
|
|
780 restore_live_registers(sasm);
|
|
|
781 __ leave();
|
|
|
782 __ ret(0);
|
|
|
783
|
|
|
784 return oop_maps;
|
|
|
785
|
|
|
786 }
|
|
|
787
|
|
|
788
|
|
|
789 OopMapSet* Runtime1::generate_code_for(StubID id, StubAssembler* sasm) {
|
|
|
790
|
|
|
791 // for better readability
|
|
|
792 const bool must_gc_arguments = true;
|
|
|
793 const bool dont_gc_arguments = false;
|
|
|
794
|
|
|
795 // default value; overwritten for some optimized stubs that are called from methods that do not use the fpu
|
|
|
796 bool save_fpu_registers = true;
|
|
|
797
|
|
|
798 // stub code & info for the different stubs
|
|
|
799 OopMapSet* oop_maps = NULL;
|
|
|
800 switch (id) {
|
|
|
801 case forward_exception_id:
|
|
|
802 {
|
|
|
803 // we're handling an exception in the context of a compiled
|
|
|
804 // frame. The registers have been saved in the standard
|
|
|
805 // places. Perform an exception lookup in the caller and
|
|
|
806 // dispatch to the handler if found. Otherwise unwind and
|
|
|
807 // dispatch to the callers exception handler.
|
|
|
808
|
|
|
809 const Register thread = rdi;
|
|
|
810 const Register exception_oop = rax;
|
|
|
811 const Register exception_pc = rdx;
|
|
|
812
|
|
|
813 // load pending exception oop into rax,
|
|
|
814 __ movl(exception_oop, Address(thread, Thread::pending_exception_offset()));
|
|
|
815 // clear pending exception
|
|
|
816 __ movl(Address(thread, Thread::pending_exception_offset()), NULL_WORD);
|
|
|
817
|
|
|
818 // load issuing PC (the return address for this stub) into rdx
|
|
|
819 __ movl(exception_pc, Address(rbp, 1*BytesPerWord));
|
|
|
820
|
|
|
821 // make sure that the vm_results are cleared (may be unnecessary)
|
|
|
822 __ movl(Address(thread, JavaThread::vm_result_offset()), NULL_WORD);
|
|
|
823 __ movl(Address(thread, JavaThread::vm_result_2_offset()), NULL_WORD);
|
|
|
824
|
|
|
825 // verify that that there is really a valid exception in rax,
|
|
|
826 __ verify_not_null_oop(exception_oop);
|
|
|
827
|
|
|
828
|
|
|
829 oop_maps = new OopMapSet();
|
|
|
830 OopMap* oop_map = generate_oop_map(sasm, 1);
|
|
|
831 generate_handle_exception(sasm, oop_maps, oop_map);
|
|
|
832 __ stop("should not reach here");
|
|
|
833 }
|
|
|
834 break;
|
|
|
835
|
|
|
836 case new_instance_id:
|
|
|
837 case fast_new_instance_id:
|
|
|
838 case fast_new_instance_init_check_id:
|
|
|
839 {
|
|
|
840 Register klass = rdx; // Incoming
|
|
|
841 Register obj = rax; // Result
|
|
|
842
|
|
|
843 if (id == new_instance_id) {
|
|
|
844 __ set_info("new_instance", dont_gc_arguments);
|
|
|
845 } else if (id == fast_new_instance_id) {
|
|
|
846 __ set_info("fast new_instance", dont_gc_arguments);
|
|
|
847 } else {
|
|
|
848 assert(id == fast_new_instance_init_check_id, "bad StubID");
|
|
|
849 __ set_info("fast new_instance init check", dont_gc_arguments);
|
|
|
850 }
|
|
|
851
|
|
|
852 if ((id == fast_new_instance_id || id == fast_new_instance_init_check_id) &&
|
|
|
853 UseTLAB && FastTLABRefill) {
|
|
|
854 Label slow_path;
|
|
|
855 Register obj_size = rcx;
|
|
|
856 Register t1 = rbx;
|
|
|
857 Register t2 = rsi;
|
|
|
858 assert_different_registers(klass, obj, obj_size, t1, t2);
|
|
|
859
|
|
|
860 __ pushl(rdi);
|
|
|
861 __ pushl(rbx);
|
|
|
862
|
|
|
863 if (id == fast_new_instance_init_check_id) {
|
|
|
864 // make sure the klass is initialized
|
|
|
865 __ cmpl(Address(klass, instanceKlass::init_state_offset_in_bytes() + sizeof(oopDesc)), instanceKlass::fully_initialized);
|
|
|
866 __ jcc(Assembler::notEqual, slow_path);
|
|
|
867 }
|
|
|
868
|
|
|
869 #ifdef ASSERT
|
|
|
870 // assert object can be fast path allocated
|
|
|
871 {
|
|
|
872 Label ok, not_ok;
|
|
|
873 __ movl(obj_size, Address(klass, Klass::layout_helper_offset_in_bytes() + sizeof(oopDesc)));
|
|
|
874 __ cmpl(obj_size, 0); // make sure it's an instance (LH > 0)
|
|
|
875 __ jcc(Assembler::lessEqual, not_ok);
|
|
|
876 __ testl(obj_size, Klass::_lh_instance_slow_path_bit);
|
|
|
877 __ jcc(Assembler::zero, ok);
|
|
|
878 __ bind(not_ok);
|
|
|
879 __ stop("assert(can be fast path allocated)");
|
|
|
880 __ should_not_reach_here();
|
|
|
881 __ bind(ok);
|
|
|
882 }
|
|
|
883 #endif // ASSERT
|
|
|
884
|
|
|
885 // if we got here then the TLAB allocation failed, so try
|
|
|
886 // refilling the TLAB or allocating directly from eden.
|
|
|
887 Label retry_tlab, try_eden;
|
|
|
888 __ tlab_refill(retry_tlab, try_eden, slow_path); // does not destroy rdx (klass)
|
|
|
889
|
|
|
890 __ bind(retry_tlab);
|
|
|
891
|
|
|
892 // get the instance size
|
|
|
893 __ movl(obj_size, Address(klass, klassOopDesc::header_size() * HeapWordSize + Klass::layout_helper_offset_in_bytes()));
|
|
|
894 __ tlab_allocate(obj, obj_size, 0, t1, t2, slow_path);
|
|
|
895 __ initialize_object(obj, klass, obj_size, 0, t1, t2);
|
|
|
896 __ verify_oop(obj);
|
|
|
897 __ popl(rbx);
|
|
|
898 __ popl(rdi);
|
|
|
899 __ ret(0);
|
|
|
900
|
|
|
901 __ bind(try_eden);
|
|
|
902 // get the instance size
|
|
|
903 __ movl(obj_size, Address(klass, klassOopDesc::header_size() * HeapWordSize + Klass::layout_helper_offset_in_bytes()));
|
|
|
904 __ eden_allocate(obj, obj_size, 0, t1, slow_path);
|
|
|
905 __ initialize_object(obj, klass, obj_size, 0, t1, t2);
|
|
|
906 __ verify_oop(obj);
|
|
|
907 __ popl(rbx);
|
|
|
908 __ popl(rdi);
|
|
|
909 __ ret(0);
|
|
|
910
|
|
|
911 __ bind(slow_path);
|
|
|
912 __ popl(rbx);
|
|
|
913 __ popl(rdi);
|
|
|
914 }
|
|
|
915
|
|
|
916 __ enter();
|
|
|
917 OopMap* map = save_live_registers(sasm, 2);
|
|
|
918 int call_offset = __ call_RT(obj, noreg, CAST_FROM_FN_PTR(address, new_instance), klass);
|
|
|
919 oop_maps = new OopMapSet();
|
|
|
920 oop_maps->add_gc_map(call_offset, map);
|
|
|
921 restore_live_registers_except_rax(sasm);
|
|
|
922 __ verify_oop(obj);
|
|
|
923 __ leave();
|
|
|
924 __ ret(0);
|
|
|
925
|
|
|
926 // rax,: new instance
|
|
|
927 }
|
|
|
928
|
|
|
929 break;
|
|
|
930
|
|
|
931 #ifdef TIERED
|
|
|
932 case counter_overflow_id:
|
|
|
933 {
|
|
|
934 Register bci = rax;
|
|
|
935 __ enter();
|
|
|
936 OopMap* map = save_live_registers(sasm, 2);
|
|
|
937 // Retrieve bci
|
|
|
938 __ movl(bci, Address(rbp, 2*BytesPerWord));
|
|
|
939 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, counter_overflow), bci);
|
|
|
940 oop_maps = new OopMapSet();
|
|
|
941 oop_maps->add_gc_map(call_offset, map);
|
|
|
942 restore_live_registers(sasm);
|
|
|
943 __ leave();
|
|
|
944 __ ret(0);
|
|
|
945 }
|
|
|
946 break;
|
|
|
947 #endif // TIERED
|
|
|
948
|
|
|
949 case new_type_array_id:
|
|
|
950 case new_object_array_id:
|
|
|
951 {
|
|
|
952 Register length = rbx; // Incoming
|
|
|
953 Register klass = rdx; // Incoming
|
|
|
954 Register obj = rax; // Result
|
|
|
955
|
|
|
956 if (id == new_type_array_id) {
|
|
|
957 __ set_info("new_type_array", dont_gc_arguments);
|
|
|
958 } else {
|
|
|
959 __ set_info("new_object_array", dont_gc_arguments);
|
|
|
960 }
|
|
|
961
|
|
|
962 #ifdef ASSERT
|
|
|
963 // assert object type is really an array of the proper kind
|
|
|
964 {
|
|
|
965 Label ok;
|
|
|
966 Register t0 = obj;
|
|
|
967 __ movl(t0, Address(klass, Klass::layout_helper_offset_in_bytes() + sizeof(oopDesc)));
|
|
|
968 __ sarl(t0, Klass::_lh_array_tag_shift);
|
|
|
969 int tag = ((id == new_type_array_id)
|
|
|
970 ? Klass::_lh_array_tag_type_value
|
|
|
971 : Klass::_lh_array_tag_obj_value);
|
|
|
972 __ cmpl(t0, tag);
|
|
|
973 __ jcc(Assembler::equal, ok);
|
|
|
974 __ stop("assert(is an array klass)");
|
|
|
975 __ should_not_reach_here();
|
|
|
976 __ bind(ok);
|
|
|
977 }
|
|
|
978 #endif // ASSERT
|
|
|
979
|
|
|
980 if (UseTLAB && FastTLABRefill) {
|
|
|
981 Register arr_size = rsi;
|
|
|
982 Register t1 = rcx; // must be rcx for use as shift count
|
|
|
983 Register t2 = rdi;
|
|
|
984 Label slow_path;
|
|
|
985 assert_different_registers(length, klass, obj, arr_size, t1, t2);
|
|
|
986
|
|
|
987 // check that array length is small enough for fast path.
|
|
|
988 __ cmpl(length, C1_MacroAssembler::max_array_allocation_length);
|
|
|
989 __ jcc(Assembler::above, slow_path);
|
|
|
990
|
|
|
991 // if we got here then the TLAB allocation failed, so try
|
|
|
992 // refilling the TLAB or allocating directly from eden.
|
|
|
993 Label retry_tlab, try_eden;
|
|
|
994 __ tlab_refill(retry_tlab, try_eden, slow_path); // preserves rbx, & rdx
|
|
|
995
|
|
|
996 __ bind(retry_tlab);
|
|
|
997
|
|
|
998 // get the allocation size: round_up(hdr + length << (layout_helper & 0x1F))
|
|
|
999 __ movl(t1, Address(klass, klassOopDesc::header_size() * HeapWordSize + Klass::layout_helper_offset_in_bytes()));
|
|
|
1000 __ movl(arr_size, length);
|
|
|
1001 assert(t1 == rcx, "fixed register usage");
|
|
|
1002 __ shll(arr_size /* by t1=rcx, mod 32 */);
|
|
|
1003 __ shrl(t1, Klass::_lh_header_size_shift);
|
|
|
1004 __ andl(t1, Klass::_lh_header_size_mask);
|
|
|
1005 __ addl(arr_size, t1);
|
|
|
1006 __ addl(arr_size, MinObjAlignmentInBytesMask); // align up
|
|
|
1007 __ andl(arr_size, ~MinObjAlignmentInBytesMask);
|
|
|
1008
|
|
|
1009 __ tlab_allocate(obj, arr_size, 0, t1, t2, slow_path); // preserves arr_size
|
|
|
1010
|
|
|
1011 __ initialize_header(obj, klass, length, t1, t2);
|
|
|
1012 __ movb(t1, Address(klass, klassOopDesc::header_size() * HeapWordSize + Klass::layout_helper_offset_in_bytes() + (Klass::_lh_header_size_shift / BitsPerByte)));
|
|
|
1013 assert(Klass::_lh_header_size_shift % BitsPerByte == 0, "bytewise");
|
|
|
1014 assert(Klass::_lh_header_size_mask <= 0xFF, "bytewise");
|
|
|
1015 __ andl(t1, Klass::_lh_header_size_mask);
|
|
|
1016 __ subl(arr_size, t1); // body length
|
|
|
1017 __ addl(t1, obj); // body start
|
|
|
1018 __ initialize_body(t1, arr_size, 0, t2);
|
|
|
1019 __ verify_oop(obj);
|
|
|
1020 __ ret(0);
|
|
|
1021
|
|
|
1022 __ bind(try_eden);
|
|
|
1023 // get the allocation size: round_up(hdr + length << (layout_helper & 0x1F))
|
|
|
1024 __ movl(t1, Address(klass, klassOopDesc::header_size() * HeapWordSize + Klass::layout_helper_offset_in_bytes()));
|
|
|
1025 __ movl(arr_size, length);
|
|
|
1026 assert(t1 == rcx, "fixed register usage");
|
|
|
1027 __ shll(arr_size /* by t1=rcx, mod 32 */);
|
|
|
1028 __ shrl(t1, Klass::_lh_header_size_shift);
|
|
|
1029 __ andl(t1, Klass::_lh_header_size_mask);
|
|
|
1030 __ addl(arr_size, t1);
|
|
|
1031 __ addl(arr_size, MinObjAlignmentInBytesMask); // align up
|
|
|
1032 __ andl(arr_size, ~MinObjAlignmentInBytesMask);
|
|
|
1033
|
|
|
1034 __ eden_allocate(obj, arr_size, 0, t1, slow_path); // preserves arr_size
|
|
|
1035
|
|
|
1036 __ initialize_header(obj, klass, length, t1, t2);
|
|
|
1037 __ movb(t1, Address(klass, klassOopDesc::header_size() * HeapWordSize + Klass::layout_helper_offset_in_bytes() + (Klass::_lh_header_size_shift / BitsPerByte)));
|
|
|
1038 assert(Klass::_lh_header_size_shift % BitsPerByte == 0, "bytewise");
|
|
|
1039 assert(Klass::_lh_header_size_mask <= 0xFF, "bytewise");
|
|
|
1040 __ andl(t1, Klass::_lh_header_size_mask);
|
|
|
1041 __ subl(arr_size, t1); // body length
|
|
|
1042 __ addl(t1, obj); // body start
|
|
|
1043 __ initialize_body(t1, arr_size, 0, t2);
|
|
|
1044 __ verify_oop(obj);
|
|
|
1045 __ ret(0);
|
|
|
1046
|
|
|
1047 __ bind(slow_path);
|
|
|
1048 }
|
|
|
1049
|
|
|
1050 __ enter();
|
|
|
1051 OopMap* map = save_live_registers(sasm, 3);
|
|
|
1052 int call_offset;
|
|
|
1053 if (id == new_type_array_id) {
|
|
|
1054 call_offset = __ call_RT(obj, noreg, CAST_FROM_FN_PTR(address, new_type_array), klass, length);
|
|
|
1055 } else {
|
|
|
1056 call_offset = __ call_RT(obj, noreg, CAST_FROM_FN_PTR(address, new_object_array), klass, length);
|
|
|
1057 }
|
|
|
1058
|
|
|
1059 oop_maps = new OopMapSet();
|
|
|
1060 oop_maps->add_gc_map(call_offset, map);
|
|
|
1061 restore_live_registers_except_rax(sasm);
|
|
|
1062
|
|
|
1063 __ verify_oop(obj);
|
|
|
1064 __ leave();
|
|
|
1065 __ ret(0);
|
|
|
1066
|
|
|
1067 // rax,: new array
|
|
|
1068 }
|
|
|
1069 break;
|
|
|
1070
|
|
|
1071 case new_multi_array_id:
|
|
|
1072 { StubFrame f(sasm, "new_multi_array", dont_gc_arguments);
|
|
|
1073 // rax,: klass
|
|
|
1074 // rbx,: rank
|
|
|
1075 // rcx: address of 1st dimension
|
|
|
1076 OopMap* map = save_live_registers(sasm, 4);
|
|
|
1077 int call_offset = __ call_RT(rax, noreg, CAST_FROM_FN_PTR(address, new_multi_array), rax, rbx, rcx);
|
|
|
1078
|
|
|
1079 oop_maps = new OopMapSet();
|
|
|
1080 oop_maps->add_gc_map(call_offset, map);
|
|
|
1081 restore_live_registers_except_rax(sasm);
|
|
|
1082
|
|
|
1083 // rax,: new multi array
|
|
|
1084 __ verify_oop(rax);
|
|
|
1085 }
|
|
|
1086 break;
|
|
|
1087
|
|
|
1088 case register_finalizer_id:
|
|
|
1089 {
|
|
|
1090 __ set_info("register_finalizer", dont_gc_arguments);
|
|
|
1091
|
|
|
1092 // The object is passed on the stack and we haven't pushed a
|
|
|
1093 // frame yet so it's one work away from top of stack.
|
|
|
1094 __ movl(rax, Address(rsp, 1 * BytesPerWord));
|
|
|
1095 __ verify_oop(rax);
|
|
|
1096
|
|
|
1097 // load the klass and check the has finalizer flag
|
|
|
1098 Label register_finalizer;
|
|
|
1099 Register t = rsi;
|
|
|
1100 __ movl(t, Address(rax, oopDesc::klass_offset_in_bytes()));
|
|
|
1101 __ movl(t, Address(t, Klass::access_flags_offset_in_bytes() + sizeof(oopDesc)));
|
|
|
1102 __ testl(t, JVM_ACC_HAS_FINALIZER);
|
|
|
1103 __ jcc(Assembler::notZero, register_finalizer);
|
|
|
1104 __ ret(0);
|
|
|
1105
|
|
|
1106 __ bind(register_finalizer);
|
|
|
1107 __ enter();
|
|
|
1108 OopMap* oop_map = save_live_registers(sasm, 2 /*num_rt_args */);
|
|
|
1109 int call_offset = __ call_RT(noreg, noreg,
|
|
|
1110 CAST_FROM_FN_PTR(address, SharedRuntime::register_finalizer), rax);
|
|
|
1111 oop_maps = new OopMapSet();
|
|
|
1112 oop_maps->add_gc_map(call_offset, oop_map);
|
|
|
1113
|
|
|
1114 // Now restore all the live registers
|
|
|
1115 restore_live_registers(sasm);
|
|
|
1116
|
|
|
1117 __ leave();
|
|
|
1118 __ ret(0);
|
|
|
1119 }
|
|
|
1120 break;
|
|
|
1121
|
|
|
1122 case throw_range_check_failed_id:
|
|
|
1123 { StubFrame f(sasm, "range_check_failed", dont_gc_arguments);
|
|
|
1124 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_range_check_exception), true);
|
|
|
1125 }
|
|
|
1126 break;
|
|
|
1127
|
|
|
1128 case throw_index_exception_id:
|
|
|
1129 { StubFrame f(sasm, "index_range_check_failed", dont_gc_arguments);
|
|
|
1130 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_index_exception), true);
|
|
|
1131 }
|
|
|
1132 break;
|
|
|
1133
|
|
|
1134 case throw_div0_exception_id:
|
|
|
1135 { StubFrame f(sasm, "throw_div0_exception", dont_gc_arguments);
|
|
|
1136 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_div0_exception), false);
|
|
|
1137 }
|
|
|
1138 break;
|
|
|
1139
|
|
|
1140 case throw_null_pointer_exception_id:
|
|
|
1141 { StubFrame f(sasm, "throw_null_pointer_exception", dont_gc_arguments);
|
|
|
1142 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_null_pointer_exception), false);
|
|
|
1143 }
|
|
|
1144 break;
|
|
|
1145
|
|
|
1146 case handle_exception_nofpu_id:
|
|
|
1147 save_fpu_registers = false;
|
|
|
1148 // fall through
|
|
|
1149 case handle_exception_id:
|
|
|
1150 { StubFrame f(sasm, "handle_exception", dont_gc_arguments);
|
|
|
1151 oop_maps = new OopMapSet();
|
|
|
1152 OopMap* oop_map = save_live_registers(sasm, 1, save_fpu_registers);
|
|
|
1153 generate_handle_exception(sasm, oop_maps, oop_map, save_fpu_registers);
|
|
|
1154 }
|
|
|
1155 break;
|
|
|
1156
|
|
|
1157 case unwind_exception_id:
|
|
|
1158 { __ set_info("unwind_exception", dont_gc_arguments);
|
|
|
1159 // note: no stubframe since we are about to leave the current
|
|
|
1160 // activation and we are calling a leaf VM function only.
|
|
|
1161 generate_unwind_exception(sasm);
|
|
|
1162 }
|
|
|
1163 break;
|
|
|
1164
|
|
|
1165 case throw_array_store_exception_id:
|
|
|
1166 { StubFrame f(sasm, "throw_array_store_exception", dont_gc_arguments);
|
|
|
1167 // tos + 0: link
|
|
|
1168 // + 1: return address
|
|
|
1169 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_array_store_exception), false);
|
|
|
1170 }
|
|
|
1171 break;
|
|
|
1172
|
|
|
1173 case throw_class_cast_exception_id:
|
|
|
1174 { StubFrame f(sasm, "throw_class_cast_exception", dont_gc_arguments);
|
|
|
1175 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_class_cast_exception), true);
|
|
|
1176 }
|
|
|
1177 break;
|
|
|
1178
|
|
|
1179 case throw_incompatible_class_change_error_id:
|
|
|
1180 { StubFrame f(sasm, "throw_incompatible_class_cast_exception", dont_gc_arguments);
|
|
|
1181 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_incompatible_class_change_error), false);
|
|
|
1182 }
|
|
|
1183 break;
|
|
|
1184
|
|
|
1185 case slow_subtype_check_id:
|
|
|
1186 {
|
|
|
1187 enum layout {
|
|
|
1188 rax_off,
|
|
|
1189 rcx_off,
|
|
|
1190 rsi_off,
|
|
|
1191 rdi_off,
|
|
|
1192 saved_rbp_off,
|
|
|
1193 return_off,
|
|
|
1194 sub_off,
|
|
|
1195 super_off,
|
|
|
1196 framesize
|
|
|
1197 };
|
|
|
1198
|
|
|
1199 __ set_info("slow_subtype_check", dont_gc_arguments);
|
|
|
1200 __ pushl(rdi);
|
|
|
1201 __ pushl(rsi);
|
|
|
1202 __ pushl(rcx);
|
|
|
1203 __ pushl(rax);
|
|
|
1204 __ movl(rsi, Address(rsp, (super_off - 1) * BytesPerWord)); // super
|
|
|
1205 __ movl(rax, Address(rsp, (sub_off - 1) * BytesPerWord)); // sub
|
|
|
1206
|
|
|
1207 __ movl(rdi,Address(rsi,sizeof(oopDesc) + Klass::secondary_supers_offset_in_bytes()));
|
|
|
1208 __ movl(rcx,Address(rdi,arrayOopDesc::length_offset_in_bytes()));
|
|
|
1209 __ addl(rdi,arrayOopDesc::base_offset_in_bytes(T_OBJECT));
|
|
|
1210
|
|
|
1211 Label miss;
|
|
|
1212 __ repne_scan();
|
|
|
1213 __ jcc(Assembler::notEqual, miss);
|
|
|
1214 __ movl(Address(rsi,sizeof(oopDesc) + Klass::secondary_super_cache_offset_in_bytes()), rax);
|
|
|
1215 __ movl(Address(rsp, (super_off - 1) * BytesPerWord), 1); // result
|
|
|
1216 __ popl(rax);
|
|
|
1217 __ popl(rcx);
|
|
|
1218 __ popl(rsi);
|
|
|
1219 __ popl(rdi);
|
|
|
1220 __ ret(0);
|
|
|
1221
|
|
|
1222 __ bind(miss);
|
|
|
1223 __ movl(Address(rsp, (super_off - 1) * BytesPerWord), 0); // result
|
|
|
1224 __ popl(rax);
|
|
|
1225 __ popl(rcx);
|
|
|
1226 __ popl(rsi);
|
|
|
1227 __ popl(rdi);
|
|
|
1228 __ ret(0);
|
|
|
1229 }
|
|
|
1230 break;
|
|
|
1231
|
|
|
1232 case monitorenter_nofpu_id:
|
|
|
1233 save_fpu_registers = false;
|
|
|
1234 // fall through
|
|
|
1235 case monitorenter_id:
|
|
|
1236 {
|
|
|
1237 StubFrame f(sasm, "monitorenter", dont_gc_arguments);
|
|
|
1238 OopMap* map = save_live_registers(sasm, 3, save_fpu_registers);
|
|
|
1239
|
|
|
1240 f.load_argument(1, rax); // rax,: object
|
|
|
1241 f.load_argument(0, rbx); // rbx,: lock address
|
|
|
1242
|
|
|
1243 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorenter), rax, rbx);
|
|
|
1244
|
|
|
1245 oop_maps = new OopMapSet();
|
|
|
1246 oop_maps->add_gc_map(call_offset, map);
|
|
|
1247 restore_live_registers(sasm, save_fpu_registers);
|
|
|
1248 }
|
|
|
1249 break;
|
|
|
1250
|
|
|
1251 case monitorexit_nofpu_id:
|
|
|
1252 save_fpu_registers = false;
|
|
|
1253 // fall through
|
|
|
1254 case monitorexit_id:
|
|
|
1255 {
|
|
|
1256 StubFrame f(sasm, "monitorexit", dont_gc_arguments);
|
|
|
1257 OopMap* map = save_live_registers(sasm, 2, save_fpu_registers);
|
|
|
1258
|
|
|
1259 f.load_argument(0, rax); // rax,: lock address
|
|
|
1260
|
|
|
1261 // note: really a leaf routine but must setup last java sp
|
|
|
1262 // => use call_RT for now (speed can be improved by
|
|
|
1263 // doing last java sp setup manually)
|
|
|
1264 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorexit), rax);
|
|
|
1265
|
|
|
1266 oop_maps = new OopMapSet();
|
|
|
1267 oop_maps->add_gc_map(call_offset, map);
|
|
|
1268 restore_live_registers(sasm, save_fpu_registers);
|
|
|
1269
|
|
|
1270 }
|
|
|
1271 break;
|
|
|
1272
|
|
|
1273 case access_field_patching_id:
|
|
|
1274 { StubFrame f(sasm, "access_field_patching", dont_gc_arguments);
|
|
|
1275 // we should set up register map
|
|
|
1276 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, access_field_patching));
|
|
|
1277 }
|
|
|
1278 break;
|
|
|
1279
|
|
|
1280 case load_klass_patching_id:
|
|
|
1281 { StubFrame f(sasm, "load_klass_patching", dont_gc_arguments);
|
|
|
1282 // we should set up register map
|
|
|
1283 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_klass_patching));
|
|
|
1284 }
|
|
|
1285 break;
|
|
|
1286
|
|
|
1287 case jvmti_exception_throw_id:
|
|
|
1288 { // rax,: exception oop
|
|
|
1289 StubFrame f(sasm, "jvmti_exception_throw", dont_gc_arguments);
|
|
|
1290 // Preserve all registers across this potentially blocking call
|
|
|
1291 const int num_rt_args = 2; // thread, exception oop
|
|
|
1292 OopMap* map = save_live_registers(sasm, num_rt_args);
|
|
|
1293 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, Runtime1::post_jvmti_exception_throw), rax);
|
|
|
1294 oop_maps = new OopMapSet();
|
|
|
1295 oop_maps->add_gc_map(call_offset, map);
|
|
|
1296 restore_live_registers(sasm);
|
|
|
1297 }
|
|
|
1298 break;
|
|
|
1299
|
|
|
1300 case dtrace_object_alloc_id:
|
|
|
1301 { // rax,: object
|
|
|
1302 StubFrame f(sasm, "dtrace_object_alloc", dont_gc_arguments);
|
|
|
1303 // we can't gc here so skip the oopmap but make sure that all
|
|
|
1304 // the live registers get saved.
|
|
|
1305 save_live_registers(sasm, 1);
|
|
|
1306
|
|
|
1307 __ pushl(rax);
|
|
|
1308 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_object_alloc)));
|
|
|
1309 __ popl(rax);
|
|
|
1310
|
|
|
1311 restore_live_registers(sasm);
|
|
|
1312 }
|
|
|
1313 break;
|
|
|
1314
|
|
|
1315 case fpu2long_stub_id:
|
|
|
1316 {
|
|
|
1317 // rax, and rdx are destroyed, but should be free since the result is returned there
|
|
|
1318 // preserve rsi,ecx
|
|
|
1319 __ pushl(rsi);
|
|
|
1320 __ pushl(rcx);
|
|
|
1321
|
|
|
1322 // check for NaN
|
|
|
1323 Label return0, do_return, return_min_jlong, do_convert;
|
|
|
1324
|
|
|
1325 Address value_high_word(rsp, 8);
|
|
|
1326 Address value_low_word(rsp, 4);
|
|
|
1327 Address result_high_word(rsp, 16);
|
|
|
1328 Address result_low_word(rsp, 12);
|
|
|
1329
|
|
|
1330 __ subl(rsp, 20);
|
|
|
1331 __ fst_d(value_low_word);
|
|
|
1332 __ movl(rax, value_high_word);
|
|
|
1333 __ andl(rax, 0x7ff00000);
|
|
|
1334 __ cmpl(rax, 0x7ff00000);
|
|
|
1335 __ jcc(Assembler::notEqual, do_convert);
|
|
|
1336 __ movl(rax, value_high_word);
|
|
|
1337 __ andl(rax, 0xfffff);
|
|
|
1338 __ orl(rax, value_low_word);
|
|
|
1339 __ jcc(Assembler::notZero, return0);
|
|
|
1340
|
|
|
1341 __ bind(do_convert);
|
|
|
1342 __ fnstcw(Address(rsp, 0));
|
|
|
1343 __ movzxw(rax, Address(rsp, 0));
|
|
|
1344 __ orl(rax, 0xc00);
|
|
|
1345 __ movw(Address(rsp, 2), rax);
|
|
|
1346 __ fldcw(Address(rsp, 2));
|
|
|
1347 __ fwait();
|
|
|
1348 __ fistp_d(result_low_word);
|
|
|
1349 __ fldcw(Address(rsp, 0));
|
|
|
1350 __ fwait();
|
|
|
1351 __ movl(rax, result_low_word);
|
|
|
1352 __ movl(rdx, result_high_word);
|
|
|
1353 __ movl(rcx, rax);
|
|
|
1354 // What the heck is the point of the next instruction???
|
|
|
1355 __ xorl(rcx, 0x0);
|
|
|
1356 __ movl(rsi, 0x80000000);
|
|
|
1357 __ xorl(rsi, rdx);
|
|
|
1358 __ orl(rcx, rsi);
|
|
|
1359 __ jcc(Assembler::notEqual, do_return);
|
|
|
1360 __ fldz();
|
|
|
1361 __ fcomp_d(value_low_word);
|
|
|
1362 __ fnstsw_ax();
|
|
|
1363 __ sahf();
|
|
|
1364 __ jcc(Assembler::above, return_min_jlong);
|
|
|
1365 // return max_jlong
|
|
|
1366 __ movl(rdx, 0x7fffffff);
|
|
|
1367 __ movl(rax, 0xffffffff);
|
|
|
1368 __ jmp(do_return);
|
|
|
1369
|
|
|
1370 __ bind(return_min_jlong);
|
|
|
1371 __ movl(rdx, 0x80000000);
|
|
|
1372 __ xorl(rax, rax);
|
|
|
1373 __ jmp(do_return);
|
|
|
1374
|
|
|
1375 __ bind(return0);
|
|
|
1376 __ fpop();
|
|
|
1377 __ xorl(rdx,rdx);
|
|
|
1378 __ xorl(rax,rax);
|
|
|
1379
|
|
|
1380 __ bind(do_return);
|
|
|
1381 __ addl(rsp, 20);
|
|
|
1382 __ popl(rcx);
|
|
|
1383 __ popl(rsi);
|
|
|
1384 __ ret(0);
|
|
|
1385 }
|
|
|
1386 break;
|
|
|
1387
|
|
|
1388 default:
|
|
|
1389 { StubFrame f(sasm, "unimplemented entry", dont_gc_arguments);
|
|
|
1390 __ movl(rax, (int)id);
|
|
|
1391 __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, unimplemented_entry), rax);
|
|
|
1392 __ should_not_reach_here();
|
|
|
1393 }
|
|
|
1394 break;
|
|
|
1395 }
|
|
|
1396 return oop_maps;
|
|
|
1397 }
|
|
|
1398
|
|
|
1399 #undef __
|
