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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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992 if (emit_debug_code()) { | 992 if (emit_debug_code()) { |
993 push(scratch); | 993 push(scratch); |
994 // Read the first word and compare to native_context_map. | 994 // Read the first word and compare to native_context_map. |
995 mov(scratch, FieldOperand(scratch, HeapObject::kMapOffset)); | 995 mov(scratch, FieldOperand(scratch, HeapObject::kMapOffset)); |
996 cmp(scratch, isolate()->factory()->native_context_map()); | 996 cmp(scratch, isolate()->factory()->native_context_map()); |
997 Check(equal, "JSGlobalObject::native_context should be a native context."); | 997 Check(equal, "JSGlobalObject::native_context should be a native context."); |
998 pop(scratch); | 998 pop(scratch); |
999 } | 999 } |
1000 | 1000 |
1001 // Check if both contexts are the same. | 1001 // Check if both contexts are the same. |
1002 cmp(scratch, FieldOperand(holder_reg, JSGlobalProxy::kContextOffset)); | 1002 cmp(scratch, FieldOperand(holder_reg, JSGlobalProxy::kNativeContextOffset)); |
1003 j(equal, &same_contexts); | 1003 j(equal, &same_contexts); |
1004 | 1004 |
1005 // Compare security tokens, save holder_reg on the stack so we can use it | 1005 // Compare security tokens, save holder_reg on the stack so we can use it |
1006 // as a temporary register. | 1006 // as a temporary register. |
1007 // | 1007 // |
1008 // TODO(119): avoid push(holder_reg)/pop(holder_reg) | 1008 // TODO(119): avoid push(holder_reg)/pop(holder_reg) |
1009 push(holder_reg); | 1009 push(holder_reg); |
1010 // Check that the security token in the calling global object is | 1010 // Check that the security token in the calling global object is |
1011 // compatible with the security token in the receiving global | 1011 // compatible with the security token in the receiving global |
1012 // object. | 1012 // object. |
1013 mov(holder_reg, FieldOperand(holder_reg, JSGlobalProxy::kContextOffset)); | 1013 mov(holder_reg, |
| 1014 FieldOperand(holder_reg, JSGlobalProxy::kNativeContextOffset)); |
1014 | 1015 |
1015 // Check the context is a native context. | 1016 // Check the context is a native context. |
1016 if (emit_debug_code()) { | 1017 if (emit_debug_code()) { |
1017 cmp(holder_reg, isolate()->factory()->null_value()); | 1018 cmp(holder_reg, isolate()->factory()->null_value()); |
1018 Check(not_equal, "JSGlobalProxy::context() should not be null."); | 1019 Check(not_equal, "JSGlobalProxy::context() should not be null."); |
1019 | 1020 |
1020 push(holder_reg); | 1021 push(holder_reg); |
1021 // Read the first word and compare to native_context_map(), | 1022 // Read the first word and compare to native_context_map(), |
1022 mov(holder_reg, FieldOperand(holder_reg, HeapObject::kMapOffset)); | 1023 mov(holder_reg, FieldOperand(holder_reg, HeapObject::kMapOffset)); |
1023 cmp(holder_reg, isolate()->factory()->native_context_map()); | 1024 cmp(holder_reg, isolate()->factory()->native_context_map()); |
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2923 // Load the prototype from the map and loop if non-null. | 2924 // Load the prototype from the map and loop if non-null. |
2924 bind(&check_prototype); | 2925 bind(&check_prototype); |
2925 mov(ecx, FieldOperand(ebx, Map::kPrototypeOffset)); | 2926 mov(ecx, FieldOperand(ebx, Map::kPrototypeOffset)); |
2926 cmp(ecx, isolate()->factory()->null_value()); | 2927 cmp(ecx, isolate()->factory()->null_value()); |
2927 j(not_equal, &next); | 2928 j(not_equal, &next); |
2928 } | 2929 } |
2929 | 2930 |
2930 } } // namespace v8::internal | 2931 } } // namespace v8::internal |
2931 | 2932 |
2932 #endif // V8_TARGET_ARCH_IA32 | 2933 #endif // V8_TARGET_ARCH_IA32 |
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