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 18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 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 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 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 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 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
