1 // Copyright 2006-2008 the V8 project authors. All rights reserved.
2 // Redistribution and use in source and binary forms, with or without
3 // modification, are permitted provided that the following conditions are
4 // met:
5 //
6 // * Redistributions of source code must retain the above copyright
7 // notice, this list of conditions and the following disclaimer.
8 // * Redistributions in binary form must reproduce the above
9 // copyright notice, this list of conditions and the following
10 // disclaimer in the documentation and/or other materials provided
11 // with the distribution.
12 // * Neither the name of Google Inc. nor the names of its
13 // contributors may be used to endorse or promote products derived
14 // from this software without specific prior written permission.
15 //
16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
28 #ifndef V8_IC_INL_H_
29 #define V8_IC_INL_H_
30
31 #include "ic.h"
32 #include "debug.h"
33 #include "macro-assembler.h"
34
35 namespace v8 {
36 namespace internal {
37
38
address()39 Address IC::address() {
40 // Get the address of the call.
41 Address result = pc() - Assembler::kCallTargetAddressOffset;
42
43 #ifdef ENABLE_DEBUGGER_SUPPORT
44 // First check if any break points are active if not just return the address
45 // of the call.
46 if (!Debug::has_break_points()) return result;
47
48 // At least one break point is active perform additional test to ensure that
49 // break point locations are updated correctly.
50 if (Debug::IsDebugBreak(Assembler::target_address_at(result))) {
51 // If the call site is a call to debug break then return the address in
52 // the original code instead of the address in the running code. This will
53 // cause the original code to be updated and keeps the breakpoint active in
54 // the running code.
55 return OriginalCodeAddress();
56 } else {
57 // No break point here just return the address of the call.
58 return result;
59 }
60 #else
61 return result;
62 #endif
63 }
64
65
GetTargetAtAddress(Address address)66 Code* IC::GetTargetAtAddress(Address address) {
67 // Get the target address of the IC.
68 Address target = Assembler::target_address_at(address);
69 // Convert target address to the code object. Code::GetCodeFromTargetAddress
70 // is safe for use during GC where the map might be marked.
71 Code* result = Code::GetCodeFromTargetAddress(target);
72 ASSERT(result->is_inline_cache_stub());
73 return result;
74 }
75
76
SetTargetAtAddress(Address address,Code * target)77 void IC::SetTargetAtAddress(Address address, Code* target) {
78 ASSERT(target->is_inline_cache_stub());
79 Assembler::set_target_address_at(address, target->instruction_start());
80 }
81
82
GetCodeCacheMapForObject(Object * object)83 Map* IC::GetCodeCacheMapForObject(Object* object) {
84 if (object->IsJSObject()) return JSObject::cast(object)->map();
85 // If the object is a value, we use the prototype map for the cache.
86 ASSERT(object->IsString() || object->IsNumber() || object->IsBoolean());
87 return JSObject::cast(object->GetPrototype())->map();
88 }
89
90
91 } } // namespace v8::internal
92
93 #endif // V8_IC_INL_H_
94