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Issue 10861007: Rename JSGlobalProxy::context to native_context, (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Created 8 years, 4 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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1365 push(holder_reg); // Temporarily save holder on the stack. 1365 push(holder_reg); // Temporarily save holder on the stack.
1366 // Read the first word and compare to the native_context_map. 1366 // Read the first word and compare to the native_context_map.
1367 ldr(holder_reg, FieldMemOperand(scratch, HeapObject::kMapOffset)); 1367 ldr(holder_reg, FieldMemOperand(scratch, HeapObject::kMapOffset));
1368 LoadRoot(ip, Heap::kNativeContextMapRootIndex); 1368 LoadRoot(ip, Heap::kNativeContextMapRootIndex);
1369 cmp(holder_reg, ip); 1369 cmp(holder_reg, ip);
1370 Check(eq, "JSGlobalObject::native_context should be a native context."); 1370 Check(eq, "JSGlobalObject::native_context should be a native context.");
1371 pop(holder_reg); // Restore holder. 1371 pop(holder_reg); // Restore holder.
1372 } 1372 }
1373 1373
1374 // Check if both contexts are the same. 1374 // Check if both contexts are the same.
1375 ldr(ip, FieldMemOperand(holder_reg, JSGlobalProxy::kContextOffset)); 1375 ldr(ip, FieldMemOperand(holder_reg, JSGlobalProxy::kNativeContextOffset));
1376 cmp(scratch, Operand(ip)); 1376 cmp(scratch, Operand(ip));
1377 b(eq, &same_contexts); 1377 b(eq, &same_contexts);
1378 1378
1379 // Check the context is a native context. 1379 // Check the context is a native context.
1380 if (emit_debug_code()) { 1380 if (emit_debug_code()) {
1381 // TODO(119): avoid push(holder_reg)/pop(holder_reg) 1381 // TODO(119): avoid push(holder_reg)/pop(holder_reg)
1382 // Cannot use ip as a temporary in this verification code. Due to the fact 1382 // Cannot use ip as a temporary in this verification code. Due to the fact
1383 // that ip is clobbered as part of cmp with an object Operand. 1383 // that ip is clobbered as part of cmp with an object Operand.
1384 push(holder_reg); // Temporarily save holder on the stack. 1384 push(holder_reg); // Temporarily save holder on the stack.
1385 mov(holder_reg, ip); // Move ip to its holding place. 1385 mov(holder_reg, ip); // Move ip to its holding place.
1386 LoadRoot(ip, Heap::kNullValueRootIndex); 1386 LoadRoot(ip, Heap::kNullValueRootIndex);
1387 cmp(holder_reg, ip); 1387 cmp(holder_reg, ip);
1388 Check(ne, "JSGlobalProxy::context() should not be null."); 1388 Check(ne, "JSGlobalProxy::context() should not be null.");
1389 1389
1390 ldr(holder_reg, FieldMemOperand(holder_reg, HeapObject::kMapOffset)); 1390 ldr(holder_reg, FieldMemOperand(holder_reg, HeapObject::kMapOffset));
1391 LoadRoot(ip, Heap::kNativeContextMapRootIndex); 1391 LoadRoot(ip, Heap::kNativeContextMapRootIndex);
1392 cmp(holder_reg, ip); 1392 cmp(holder_reg, ip);
1393 Check(eq, "JSGlobalObject::native_context should be a native context."); 1393 Check(eq, "JSGlobalObject::native_context should be a native context.");
1394 // Restore ip is not needed. ip is reloaded below. 1394 // Restore ip is not needed. ip is reloaded below.
1395 pop(holder_reg); // Restore holder. 1395 pop(holder_reg); // Restore holder.
1396 // Restore ip to holder's context. 1396 // Restore ip to holder's context.
1397 ldr(ip, FieldMemOperand(holder_reg, JSGlobalProxy::kContextOffset)); 1397 ldr(ip, FieldMemOperand(holder_reg, JSGlobalProxy::kNativeContextOffset));
1398 } 1398 }
1399 1399
1400 // Check that the security token in the calling global object is 1400 // Check that the security token in the calling global object is
1401 // compatible with the security token in the receiving global 1401 // compatible with the security token in the receiving global
1402 // object. 1402 // object.
1403 int token_offset = Context::kHeaderSize + 1403 int token_offset = Context::kHeaderSize +
1404 Context::SECURITY_TOKEN_INDEX * kPointerSize; 1404 Context::SECURITY_TOKEN_INDEX * kPointerSize;
1405 1405
1406 ldr(scratch, FieldMemOperand(scratch, token_offset)); 1406 ldr(scratch, FieldMemOperand(scratch, token_offset));
1407 ldr(ip, FieldMemOperand(ip, token_offset)); 1407 ldr(ip, FieldMemOperand(ip, token_offset));
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3824 void CodePatcher::EmitCondition(Condition cond) { 3824 void CodePatcher::EmitCondition(Condition cond) {
3825 Instr instr = Assembler::instr_at(masm_.pc_); 3825 Instr instr = Assembler::instr_at(masm_.pc_);
3826 instr = (instr & ~kCondMask) | cond; 3826 instr = (instr & ~kCondMask) | cond;
3827 masm_.emit(instr); 3827 masm_.emit(instr);
3828 } 3828 }
3829 3829
3830 3830
3831 } } // namespace v8::internal 3831 } } // namespace v8::internal
3832 3832
3833 #endif // V8_TARGET_ARCH_ARM 3833 #endif // V8_TARGET_ARCH_ARM
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