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1 /*
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2 * Copyright 2003-2009 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 // This file specializes the assember with interpreter-specific macros
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26
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27
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304
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28 class InterpreterMacroAssembler: public MacroAssembler {
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29 #ifndef CC_INTERP
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30 protected:
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31 // Interpreter specific version of call_VM_base
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32 virtual void call_VM_leaf_base(address entry_point,
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33 int number_of_arguments);
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34
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35 virtual void call_VM_base(Register oop_result,
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36 Register java_thread,
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37 Register last_java_sp,
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38 address entry_point,
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39 int number_of_arguments,
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40 bool check_exceptions);
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41
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42 virtual void check_and_handle_popframe(Register java_thread);
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43 virtual void check_and_handle_earlyret(Register java_thread);
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44
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45 // base routine for all dispatches
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46 void dispatch_base(TosState state, address* table, bool verifyoop = true);
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47 #endif // CC_INTERP
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48
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49 public:
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304
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50 InterpreterMacroAssembler(CodeBuffer* code) : MacroAssembler(code) {}
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51
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52 void load_earlyret_value(TosState state);
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53
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304
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54 #ifdef CC_INTERP
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55 void save_bcp() { /* not needed in c++ interpreter and harmless */ }
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56 void restore_bcp() { /* not needed in c++ interpreter and harmless */ }
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57
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58 // Helpers for runtime call arguments/results
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59 void get_method(Register reg);
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60
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61 #else
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62
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63 // Interpreter-specific registers
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64 void save_bcp() {
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65 movptr(Address(rbp, frame::interpreter_frame_bcx_offset * wordSize), r13);
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66 }
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67
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68 void restore_bcp() {
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69 movptr(r13, Address(rbp, frame::interpreter_frame_bcx_offset * wordSize));
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70 }
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71
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72 void restore_locals() {
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73 movptr(r14, Address(rbp, frame::interpreter_frame_locals_offset * wordSize));
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74 }
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75
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76 // Helpers for runtime call arguments/results
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77 void get_method(Register reg) {
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78 movptr(reg, Address(rbp, frame::interpreter_frame_method_offset * wordSize));
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79 }
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80
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304
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81 void get_constant_pool(Register reg) {
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82 get_method(reg);
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83 movptr(reg, Address(reg, methodOopDesc::constants_offset()));
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84 }
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85
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86 void get_constant_pool_cache(Register reg) {
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87 get_constant_pool(reg);
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88 movptr(reg, Address(reg, constantPoolOopDesc::cache_offset_in_bytes()));
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89 }
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90
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304
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91 void get_cpool_and_tags(Register cpool, Register tags) {
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92 get_constant_pool(cpool);
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93 movptr(tags, Address(cpool, constantPoolOopDesc::tags_offset_in_bytes()));
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94 }
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95
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96 void get_unsigned_2_byte_index_at_bcp(Register reg, int bcp_offset);
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97 void get_cache_and_index_at_bcp(Register cache, Register index,
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98 int bcp_offset, bool giant_index = false);
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99 void get_cache_entry_pointer_at_bcp(Register cache, Register tmp,
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100 int bcp_offset, bool giant_index = false);
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101 void get_cache_index_at_bcp(Register index, int bcp_offset, bool giant_index = false);
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102
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103
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104 void pop_ptr(Register r = rax);
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105 void pop_i(Register r = rax);
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106 void pop_l(Register r = rax);
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107 void pop_f(XMMRegister r = xmm0);
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108 void pop_d(XMMRegister r = xmm0);
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109 void push_ptr(Register r = rax);
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110 void push_i(Register r = rax);
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111 void push_l(Register r = rax);
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112 void push_f(XMMRegister r = xmm0);
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113 void push_d(XMMRegister r = xmm0);
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114
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115 void pop(Register r ) { ((MacroAssembler*)this)->pop(r); }
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116
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117 void push(Register r ) { ((MacroAssembler*)this)->push(r); }
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118 void push(int32_t imm ) { ((MacroAssembler*)this)->push(imm); }
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119
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120 void pop(TosState state); // transition vtos -> state
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121 void push(TosState state); // transition state -> vtos
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122
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123 // Tagged stack support, pop and push both tag and value.
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124 void pop_ptr(Register r, Register tag);
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125 void push_ptr(Register r, Register tag);
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126 #endif // CC_INTERP
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127
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128 DEBUG_ONLY(void verify_stack_tag(frame::Tag t);)
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129
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304
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130 #ifndef CC_INTERP
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131
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132 // Tagged stack helpers for swap and dup
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133 void load_ptr_and_tag(int n, Register val, Register tag);
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134 void store_ptr_and_tag(int n, Register val, Register tag);
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135
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136 // Tagged Local support
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137 void tag_local(frame::Tag tag, int n);
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138 void tag_local(Register tag, int n);
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139 void tag_local(frame::Tag tag, Register idx);
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140 void tag_local(Register tag, Register idx);
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141
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142 #ifdef ASSERT
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143 void verify_local_tag(frame::Tag tag, int n);
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144 void verify_local_tag(frame::Tag tag, Register idx);
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145 #endif // ASSERT
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146
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147
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148 void empty_expression_stack()
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149 {
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150 movptr(rsp, Address(rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize));
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151 // NULL last_sp until next java call
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152 movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
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153 }
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154
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155 // Super call_VM calls - correspond to MacroAssembler::call_VM(_leaf) calls
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156 void super_call_VM_leaf(address entry_point);
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157 void super_call_VM_leaf(address entry_point, Register arg_1);
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158 void super_call_VM_leaf(address entry_point, Register arg_1, Register arg_2);
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159 void super_call_VM_leaf(address entry_point,
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160 Register arg_1, Register arg_2, Register arg_3);
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161
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162 // Generate a subtype check: branch to ok_is_subtype if sub_klass is
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163 // a subtype of super_klass.
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164 void gen_subtype_check( Register sub_klass, Label &ok_is_subtype );
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165
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166 // Dispatching
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167 void dispatch_prolog(TosState state, int step = 0);
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168 void dispatch_epilog(TosState state, int step = 0);
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169 // dispatch via ebx (assume ebx is loaded already)
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170 void dispatch_only(TosState state);
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171 // dispatch normal table via ebx (assume ebx is loaded already)
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172 void dispatch_only_normal(TosState state);
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173 void dispatch_only_noverify(TosState state);
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174 // load ebx from [esi + step] and dispatch via ebx
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175 void dispatch_next(TosState state, int step = 0);
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176 // load ebx from [esi] and dispatch via ebx and table
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177 void dispatch_via (TosState state, address* table);
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178
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179 // jump to an invoked target
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180 void prepare_to_jump_from_interpreted();
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181 void jump_from_interpreted(Register method, Register temp);
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182
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183
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184 // Returning from interpreted functions
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185 //
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186 // Removes the current activation (incl. unlocking of monitors)
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187 // and sets up the return address. This code is also used for
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188 // exception unwindwing. In that case, we do not want to throw
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189 // IllegalMonitorStateExceptions, since that might get us into an
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190 // infinite rethrow exception loop.
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191 // Additionally this code is used for popFrame and earlyReturn.
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192 // In popFrame case we want to skip throwing an exception,
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193 // installing an exception, and notifying jvmdi.
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194 // In earlyReturn case we only want to skip throwing an exception
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195 // and installing an exception.
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196 void remove_activation(TosState state, Register ret_addr,
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197 bool throw_monitor_exception = true,
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198 bool install_monitor_exception = true,
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199 bool notify_jvmdi = true);
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200 #endif // CC_INTERP
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201
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202 // Object locking
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203 void lock_object (Register lock_reg);
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204 void unlock_object(Register lock_reg);
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205
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304
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206 #ifndef CC_INTERP
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207
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208 // Interpreter profiling operations
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209 void set_method_data_pointer_for_bcp();
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210 void test_method_data_pointer(Register mdp, Label& zero_continue);
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211 void verify_method_data_pointer();
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212
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213 void set_mdp_data_at(Register mdp_in, int constant, Register value);
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214 void increment_mdp_data_at(Address data, bool decrement = false);
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215 void increment_mdp_data_at(Register mdp_in, int constant,
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216 bool decrement = false);
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217 void increment_mdp_data_at(Register mdp_in, Register reg, int constant,
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218 bool decrement = false);
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219 void set_mdp_flag_at(Register mdp_in, int flag_constant);
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220 void test_mdp_data_at(Register mdp_in, int offset, Register value,
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221 Register test_value_out,
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222 Label& not_equal_continue);
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223
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224 void record_klass_in_profile(Register receiver, Register mdp,
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225 Register reg2);
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226 void record_klass_in_profile_helper(Register receiver, Register mdp,
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227 Register reg2,
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228 int start_row, Label& done);
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229
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230 void update_mdp_by_offset(Register mdp_in, int offset_of_offset);
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231 void update_mdp_by_offset(Register mdp_in, Register reg, int offset_of_disp);
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232 void update_mdp_by_constant(Register mdp_in, int constant);
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233 void update_mdp_for_ret(Register return_bci);
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234
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235 void profile_taken_branch(Register mdp, Register bumped_count);
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236 void profile_not_taken_branch(Register mdp);
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237 void profile_call(Register mdp);
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238 void profile_final_call(Register mdp);
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239 void profile_virtual_call(Register receiver, Register mdp,
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240 Register scratch2,
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241 bool receiver_can_be_null = false);
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242 void profile_ret(Register return_bci, Register mdp);
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243 void profile_null_seen(Register mdp);
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244 void profile_typecheck(Register mdp, Register klass, Register scratch);
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245 void profile_typecheck_failed(Register mdp);
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246 void profile_switch_default(Register mdp);
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247 void profile_switch_case(Register index_in_scratch, Register mdp,
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248 Register scratch2);
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249
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250 // Debugging
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251 // only if +VerifyOops && state == atos
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252 void verify_oop(Register reg, TosState state = atos);
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253 // only if +VerifyFPU && (state == ftos || state == dtos)
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254 void verify_FPU(int stack_depth, TosState state = ftos);
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255
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256 #endif // !CC_INTERP
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257
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258 typedef enum { NotifyJVMTI, SkipNotifyJVMTI } NotifyMethodExitMode;
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259
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260 // support for jvmti/dtrace
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261 void notify_method_entry();
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262 void notify_method_exit(TosState state, NotifyMethodExitMode mode);
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263 };
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