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Issue 195373004: Revert "Pass a Code object to Assembler::(set_)target_address_at for use by ool constant pool." (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Created 6 years, 9 months ago
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1 // Copyright 2012 the V8 project authors. All rights reserved. 1 // Copyright 2012 the V8 project authors. All rights reserved.
2 // Redistribution and use in source and binary forms, with or without 2 // Redistribution and use in source and binary forms, with or without
3 // modification, are permitted provided that the following conditions are 3 // modification, are permitted provided that the following conditions are
4 // met: 4 // met:
5 // 5 //
6 // * Redistributions of source code must retain the above copyright 6 // * Redistributions of source code must retain the above copyright
7 // notice, this list of conditions and the following disclaimer. 7 // notice, this list of conditions and the following disclaimer.
8 // * Redistributions in binary form must reproduce the above 8 // * Redistributions in binary form must reproduce the above
9 // copyright notice, this list of conditions and the following 9 // copyright notice, this list of conditions and the following
10 // disclaimer in the documentation and/or other materials provided 10 // disclaimer in the documentation and/or other materials provided
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43 Address result = Assembler::target_address_from_return_address(pc()); 43 Address result = Assembler::target_address_from_return_address(pc());
44 44
45 #ifdef ENABLE_DEBUGGER_SUPPORT 45 #ifdef ENABLE_DEBUGGER_SUPPORT
46 Debug* debug = isolate()->debug(); 46 Debug* debug = isolate()->debug();
47 // First check if any break points are active if not just return the address 47 // First check if any break points are active if not just return the address
48 // of the call. 48 // of the call.
49 if (!debug->has_break_points()) return result; 49 if (!debug->has_break_points()) return result;
50 50
51 // At least one break point is active perform additional test to ensure that 51 // At least one break point is active perform additional test to ensure that
52 // break point locations are updated correctly. 52 // break point locations are updated correctly.
53 if (debug->IsDebugBreak(Assembler::target_address_at(result, 53 if (debug->IsDebugBreak(Assembler::target_address_at(result))) {
54 raw_constant_pool()))) {
55 // If the call site is a call to debug break then return the address in 54 // If the call site is a call to debug break then return the address in
56 // the original code instead of the address in the running code. This will 55 // the original code instead of the address in the running code. This will
57 // cause the original code to be updated and keeps the breakpoint active in 56 // cause the original code to be updated and keeps the breakpoint active in
58 // the running code. 57 // the running code.
59 Code* code = GetCode(); 58 return OriginalCodeAddress();
60 Code* original_code = GetOriginalCode();
61 intptr_t delta =
62 original_code->instruction_start() - code->instruction_start();
63 // Return the address in the original code. This is the place where
64 // the call which has been overwritten by the DebugBreakXXX resides
65 // and the place where the inline cache system should look.
66 return result + delta;
67 } else { 59 } else {
68 // No break point here just return the address of the call. 60 // No break point here just return the address of the call.
69 return result; 61 return result;
70 } 62 }
71 #else 63 #else
72 return result; 64 return result;
73 #endif 65 #endif
74 } 66 }
75 67
76 68
77 ConstantPoolArray* IC::constant_pool() const { 69 Code* IC::GetTargetAtAddress(Address address) {
78 if (!FLAG_enable_ool_constant_pool) {
79 return NULL;
80 } else {
81 Handle<ConstantPoolArray> result = raw_constant_pool_;
82 #ifdef ENABLE_DEBUGGER_SUPPORT
83 Debug* debug = isolate()->debug();
84 // First check if any break points are active if not just return the
85 // original constant pool.
86 if (!debug->has_break_points()) return *result;
87
88 // At least one break point is active perform additional test to ensure that
89 // break point locations are updated correctly.
90 Address target = Assembler::target_address_from_return_address(pc());
91 if (debug->IsDebugBreak(
92 Assembler::target_address_at(target, raw_constant_pool()))) {
93 // If the call site is a call to debug break then we want to return the
94 // constant pool for the original code instead of the breakpointed code.
95 return GetOriginalCode()->constant_pool();
96 }
97 #endif
98 return *result;
99 }
100 }
101
102
103 ConstantPoolArray* IC::raw_constant_pool() const {
104 if (FLAG_enable_ool_constant_pool) {
105 return *raw_constant_pool_;
106 } else {
107 return NULL;
108 }
109 }
110
111
112 Code* IC::GetTargetAtAddress(Address address,
113 ConstantPoolArray* constant_pool) {
114 // Get the target address of the IC. 70 // Get the target address of the IC.
115 Address target = Assembler::target_address_at(address, constant_pool); 71 Address target = Assembler::target_address_at(address);
116 // Convert target address to the code object. Code::GetCodeFromTargetAddress 72 // Convert target address to the code object. Code::GetCodeFromTargetAddress
117 // is safe for use during GC where the map might be marked. 73 // is safe for use during GC where the map might be marked.
118 Code* result = Code::GetCodeFromTargetAddress(target); 74 Code* result = Code::GetCodeFromTargetAddress(target);
119 ASSERT(result->is_inline_cache_stub()); 75 ASSERT(result->is_inline_cache_stub());
120 return result; 76 return result;
121 } 77 }
122 78
123 79
124 void IC::SetTargetAtAddress(Address address, 80 void IC::SetTargetAtAddress(Address address, Code* target) {
125 Code* target,
126 ConstantPoolArray* constant_pool) {
127 ASSERT(target->is_inline_cache_stub() || target->is_compare_ic_stub()); 81 ASSERT(target->is_inline_cache_stub() || target->is_compare_ic_stub());
128 Heap* heap = target->GetHeap(); 82 Heap* heap = target->GetHeap();
129 Code* old_target = GetTargetAtAddress(address, constant_pool); 83 Code* old_target = GetTargetAtAddress(address);
130 #ifdef DEBUG 84 #ifdef DEBUG
131 // STORE_IC and KEYED_STORE_IC use Code::extra_ic_state() to mark 85 // STORE_IC and KEYED_STORE_IC use Code::extra_ic_state() to mark
132 // ICs as strict mode. The strict-ness of the IC must be preserved. 86 // ICs as strict mode. The strict-ness of the IC must be preserved.
133 if (old_target->kind() == Code::STORE_IC || 87 if (old_target->kind() == Code::STORE_IC ||
134 old_target->kind() == Code::KEYED_STORE_IC) { 88 old_target->kind() == Code::KEYED_STORE_IC) {
135 ASSERT(StoreIC::GetStrictMode(old_target->extra_ic_state()) == 89 ASSERT(StoreIC::GetStrictMode(old_target->extra_ic_state()) ==
136 StoreIC::GetStrictMode(target->extra_ic_state())); 90 StoreIC::GetStrictMode(target->extra_ic_state()));
137 } 91 }
138 #endif 92 #endif
139 Assembler::set_target_address_at( 93 Assembler::set_target_address_at(address, target->instruction_start());
140 address, constant_pool, target->instruction_start());
141 if (heap->gc_state() == Heap::MARK_COMPACT) { 94 if (heap->gc_state() == Heap::MARK_COMPACT) {
142 heap->mark_compact_collector()->RecordCodeTargetPatch(address, target); 95 heap->mark_compact_collector()->RecordCodeTargetPatch(address, target);
143 } else { 96 } else {
144 heap->incremental_marking()->RecordCodeTargetPatch(address, target); 97 heap->incremental_marking()->RecordCodeTargetPatch(address, target);
145 } 98 }
146 PostPatching(address, target, old_target); 99 PostPatching(address, target, old_target);
147 } 100 }
148 101
149 102
150 InlineCacheHolderFlag IC::GetCodeCacheForObject(Object* object) { 103 InlineCacheHolderFlag IC::GetCodeCacheForObject(Object* object) {
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196 } 149 }
197 return handle(JSObject::cast(constructor->instance_prototype())->map()); 150 return handle(JSObject::cast(constructor->instance_prototype())->map());
198 } 151 }
199 return TypeToMap(type, isolate); 152 return TypeToMap(type, isolate);
200 } 153 }
201 154
202 155
203 } } // namespace v8::internal 156 } } // namespace v8::internal
204 157
205 #endif // V8_IC_INL_H_ 158 #endif // V8_IC_INL_H_
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