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1 /*
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2 * Copyright 1997-2007 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 // This file specializes the assember with interpreter-specific macros
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26
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27
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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(
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33 address entry_point,
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34 int number_of_arguments
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35 );
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36
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37 virtual void call_VM_base(
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38 Register oop_result,
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39 Register java_thread,
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40 Register last_java_sp,
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41 address entry_point,
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42 int number_of_arguments,
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43 bool check_exceptions
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44 );
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45
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46 virtual void check_and_handle_popframe(Register java_thread);
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47 virtual void check_and_handle_earlyret(Register java_thread);
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48
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49 // base routine for all dispatches
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50 void dispatch_base(TosState state, address* table, bool verifyoop = true);
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51 #endif /* CC_INTERP */
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52
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53 public:
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54 InterpreterMacroAssembler(CodeBuffer* code) : MacroAssembler(code) {}
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55
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56 void load_earlyret_value(TosState state);
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57
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58 // Interpreter-specific registers
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59 #ifdef CC_INTERP
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60 void save_bcp() { /* not needed in c++ interpreter and harmless */ }
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61 void restore_bcp() { /* not needed in c++ interpreter and harmless */ }
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62
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63 // Helpers for runtime call arguments/results
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64 void get_method(Register reg);
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65
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66 #else
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67
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68 void save_bcp() { movl(Address(rbp, frame::interpreter_frame_bcx_offset * wordSize), rsi); }
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69 void restore_bcp() { movl(rsi, Address(rbp, frame::interpreter_frame_bcx_offset * wordSize)); }
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70 void restore_locals() { movl(rdi, Address(rbp, frame::interpreter_frame_locals_offset * wordSize)); }
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71
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72 // Helpers for runtime call arguments/results
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73 void get_method(Register reg) { movl(reg, Address(rbp, frame::interpreter_frame_method_offset * wordSize)); }
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74 void get_constant_pool(Register reg) { get_method(reg); movl(reg, Address(reg, methodOopDesc::constants_offset())); }
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75 void get_constant_pool_cache(Register reg) { get_constant_pool(reg); movl(reg, Address(reg, constantPoolOopDesc::cache_offset_in_bytes())); }
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76 void get_cpool_and_tags(Register cpool, Register tags) { get_constant_pool(cpool); movl(tags, Address(cpool, constantPoolOopDesc::tags_offset_in_bytes()));
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77 }
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78 void get_unsigned_2_byte_index_at_bcp(Register reg, int bcp_offset);
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79 void get_cache_and_index_at_bcp(Register cache, Register index, int bcp_offset);
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80 void get_cache_entry_pointer_at_bcp(Register cache, Register tmp, int bcp_offset);
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81
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82 // Expression stack
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83 void f2ieee(); // truncate ftos to 32bits
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84 void d2ieee(); // truncate dtos to 64bits
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85 #endif // CC_INTERP
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86
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87
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88 void pop_ptr(Register r = rax);
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89 void pop_ptr(Register r, Register tag);
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90 void pop_i(Register r = rax);
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91 void pop_l(Register lo = rax, Register hi = rdx);
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92 void pop_f();
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93 void pop_d();
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94 void pop_ftos_to_rsp();
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95 void pop_dtos_to_rsp();
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96
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97 void push_ptr(Register r = rax);
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98 void push_ptr(Register r, Register tag);
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99 void push_i(Register r = rax);
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100 void push_l(Register lo = rax, Register hi = rdx);
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101 void push_d(Register r = rax);
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102 void push_f();
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103
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104 void pop(TosState state); // transition vtos -> state
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105 void push(TosState state); // transition state -> vtos
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106
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107 DEBUG_ONLY(void verify_stack_tag(frame::Tag t);)
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108
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109 #ifndef CC_INTERP
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110
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111 void empty_expression_stack() {
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112 movl(rsp, Address(rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize));
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113 // NULL last_sp until next java call
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114 movl(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD);
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115 }
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116
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117 // Tagged stack helpers for swap and dup
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118 void load_ptr_and_tag(int n, Register val, Register tag);
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119 void store_ptr_and_tag(int n, Register val, Register tag);
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120
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121 // Tagged Local support
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122
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123 void tag_local(frame::Tag tag, int n);
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124 void tag_local(Register tag, int n);
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125 void tag_local(frame::Tag tag, Register idx);
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126 void tag_local(Register tag, Register idx);
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127
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128 #ifdef ASSERT
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129 void verify_local_tag(frame::Tag tag, int n);
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130 void verify_local_tag(frame::Tag tag, Register idx);
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131 #endif // ASSERT
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132
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133 // Super call_VM calls - correspond to MacroAssembler::call_VM(_leaf) calls
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134 void super_call_VM_leaf(address entry_point);
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135 void super_call_VM_leaf(address entry_point, Register arg_1);
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136 void super_call_VM_leaf(address entry_point, Register arg_1, Register arg_2);
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137 void super_call_VM_leaf(address entry_point, Register arg_1, Register arg_2, Register arg_3);
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138
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139 // Generate a subtype check: branch to ok_is_subtype if sub_klass is
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140 // a subtype of super_klass. EAX holds the super_klass. Blows ECX
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141 // and EDI. Register sub_klass cannot be any of the above.
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142 void gen_subtype_check( Register sub_klass, Label &ok_is_subtype );
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143
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144 // Dispatching
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145 void dispatch_prolog(TosState state, int step = 0);
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146 void dispatch_epilog(TosState state, int step = 0);
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147 void dispatch_only(TosState state); // dispatch via rbx, (assume rbx, is loaded already)
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148 void dispatch_only_normal(TosState state); // dispatch normal table via rbx, (assume rbx, is loaded already)
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149 void dispatch_only_noverify(TosState state);
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150 void dispatch_next(TosState state, int step = 0); // load rbx, from [esi + step] and dispatch via rbx,
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151 void dispatch_via (TosState state, address* table); // load rbx, from [esi] and dispatch via rbx, and table
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152
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153
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154 // jump to an invoked target
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155 void jump_from_interpreted(Register method, Register temp);
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156
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157 // Returning from interpreted functions
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158 //
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159 // Removes the current activation (incl. unlocking of monitors)
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160 // and sets up the return address. This code is also used for
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161 // exception unwindwing. In that case, we do not want to throw
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162 // IllegalMonitorStateExceptions, since that might get us into an
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163 // infinite rethrow exception loop.
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164 // Additionally this code is used for popFrame and earlyReturn.
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165 // In popFrame case we want to skip throwing an exception,
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166 // installing an exception, and notifying jvmdi.
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167 // In earlyReturn case we only want to skip throwing an exception
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168 // and installing an exception.
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169 void remove_activation(TosState state, Register ret_addr,
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170 bool throw_monitor_exception = true,
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171 bool install_monitor_exception = true,
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172 bool notify_jvmdi = true);
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173 #endif /* !CC_INTERP */
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174
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175 // Debugging
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176 void verify_oop(Register reg, TosState state = atos); // only if +VerifyOops && state == atos
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177 #ifndef CC_INTERP
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178 void verify_FPU(int stack_depth, TosState state = ftos); // only if +VerifyFPU && (state == ftos || state == dtos)
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179
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180 #endif /* !CC_INTERP */
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181
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182 // Object locking
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183 void lock_object (Register lock_reg);
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184 void unlock_object(Register lock_reg);
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185
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186 #ifndef CC_INTERP
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187
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188 // Interpreter profiling operations
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189 void set_method_data_pointer_for_bcp();
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190 void test_method_data_pointer(Register mdp, Label& zero_continue);
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191 void verify_method_data_pointer();
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192
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193 void set_mdp_data_at(Register mdp_in, int constant, Register value);
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194 void increment_mdp_data_at(Address data, bool decrement = false);
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195 void increment_mdp_data_at(Register mdp_in, int constant,
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196 bool decrement = false);
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197 void increment_mdp_data_at(Register mdp_in, Register reg, int constant,
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198 bool decrement = false);
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199 void set_mdp_flag_at(Register mdp_in, int flag_constant);
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200 void test_mdp_data_at(Register mdp_in, int offset, Register value,
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201 Register test_value_out,
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202 Label& not_equal_continue);
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203
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204 void record_klass_in_profile(Register receiver, Register mdp,
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205 Register reg2);
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206 void record_klass_in_profile_helper(Register receiver, Register mdp,
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207 Register reg2,
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208 int start_row, Label& done);
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209
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210 void update_mdp_by_offset(Register mdp_in, int offset_of_offset);
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211 void update_mdp_by_offset(Register mdp_in, Register reg, int offset_of_disp);
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212 void update_mdp_by_constant(Register mdp_in, int constant);
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213 void update_mdp_for_ret(Register return_bci);
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214
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215 void profile_taken_branch(Register mdp, Register bumped_count);
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216 void profile_not_taken_branch(Register mdp);
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217 void profile_call(Register mdp);
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218 void profile_final_call(Register mdp);
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219 void profile_virtual_call(Register receiver, Register mdp, Register scratch2);
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220 void profile_ret(Register return_bci, Register mdp);
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221 void profile_null_seen(Register mdp);
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222 void profile_typecheck(Register mdp, Register klass, Register scratch);
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223 void profile_typecheck_failed(Register mdp);
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224 void profile_switch_default(Register mdp);
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225 void profile_switch_case(Register index_in_scratch, Register mdp, Register scratch2);
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226
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227 #endif /* !CC_INTERP */
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228
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229 typedef enum { NotifyJVMTI, SkipNotifyJVMTI } NotifyMethodExitMode;
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230
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231 // support for jvmti
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232 void notify_method_entry();
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233 void notify_method_exit(TosState state, NotifyMethodExitMode mode);
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234
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235 };
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