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Issue 2091733002: Reland [heap] Avoid the use of cells to point from code to new-space objects. (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master
Patch Set: Address comments. Created 4 years, 6 months ago
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1 // Copyright (c) 1994-2006 Sun Microsystems Inc. 1 // Copyright (c) 1994-2006 Sun Microsystems Inc.
2 // All Rights Reserved. 2 // All Rights Reserved.
3 // 3 //
4 // Redistribution and use in source and binary forms, with or without 4 // Redistribution and use in source and binary forms, with or without
5 // modification, are permitted provided that the following conditions 5 // modification, are permitted provided that the following conditions
6 // are met: 6 // are met:
7 // 7 //
8 // - Redistributions of source code must retain the above copyright notice, 8 // - Redistributions of source code must retain the above copyright notice,
9 // this list of conditions and the following disclaimer. 9 // this list of conditions and the following disclaimer.
10 // 10 //
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268 // ----------------------------------------------------------------------------- 268 // -----------------------------------------------------------------------------
269 // Implementation of Operand and MemOperand 269 // Implementation of Operand and MemOperand
270 // See assembler-arm-inl.h for inlined constructors 270 // See assembler-arm-inl.h for inlined constructors
271 271
272 Operand::Operand(Handle<Object> handle) { 272 Operand::Operand(Handle<Object> handle) {
273 AllowDeferredHandleDereference using_raw_address; 273 AllowDeferredHandleDereference using_raw_address;
274 rm_ = no_reg; 274 rm_ = no_reg;
275 // Verify all Objects referred by code are NOT in new space. 275 // Verify all Objects referred by code are NOT in new space.
276 Object* obj = *handle; 276 Object* obj = *handle;
277 if (obj->IsHeapObject()) { 277 if (obj->IsHeapObject()) {
278 DCHECK(!HeapObject::cast(obj)->GetHeap()->InNewSpace(obj));
279 imm32_ = reinterpret_cast<intptr_t>(handle.location()); 278 imm32_ = reinterpret_cast<intptr_t>(handle.location());
280 rmode_ = RelocInfo::EMBEDDED_OBJECT; 279 rmode_ = RelocInfo::EMBEDDED_OBJECT;
281 } else { 280 } else {
282 // no relocation needed 281 // no relocation needed
283 imm32_ = reinterpret_cast<intptr_t>(obj); 282 imm32_ = reinterpret_cast<intptr_t>(obj);
284 rmode_ = RelocInfo::NONE32; 283 rmode_ = RelocInfo::NONE32;
285 } 284 }
286 } 285 }
287 286
288 287
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4254 DCHECK(is_uint12(offset)); 4253 DCHECK(is_uint12(offset));
4255 instr_at_put(pc, SetLdrRegisterImmediateOffset(instr, offset)); 4254 instr_at_put(pc, SetLdrRegisterImmediateOffset(instr, offset));
4256 } 4255 }
4257 } 4256 }
4258 4257
4259 4258
4260 } // namespace internal 4259 } // namespace internal
4261 } // namespace v8 4260 } // namespace v8
4262 4261
4263 #endif // V8_TARGET_ARCH_ARM 4262 #endif // V8_TARGET_ARCH_ARM
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