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Issue 18842: Experimental: periodic merge of the bleeding_edge branch to the... (Closed) Base URL: http://v8.googlecode.com/svn/branches/experimental/toiger/
Patch Set: Created 11 years, 11 months ago
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1 // Copyright 2006-2008 the V8 project authors. All rights reserved. 1 // Copyright 2006-2008 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
(...skipping 972 matching lines...) Expand 10 before | Expand all | Expand 10 after
983 Abort(msg); 983 Abort(msg);
984 // will not return here 984 // will not return here
985 bind(&L); 985 bind(&L);
986 } 986 }
987 987
988 988
989 void MacroAssembler::Abort(const char* msg) { 989 void MacroAssembler::Abort(const char* msg) {
990 // We want to pass the msg string like a smi to avoid GC 990 // We want to pass the msg string like a smi to avoid GC
991 // problems, however msg is not guaranteed to be aligned 991 // problems, however msg is not guaranteed to be aligned
992 // properly. Instead, we pass an aligned pointer that is 992 // properly. Instead, we pass an aligned pointer that is
993 // a proper v8 smi, but also pass the aligment difference 993 // a proper v8 smi, but also pass the alignment difference
994 // from the real pointer as a smi. 994 // from the real pointer as a smi.
995 intptr_t p1 = reinterpret_cast<intptr_t>(msg); 995 intptr_t p1 = reinterpret_cast<intptr_t>(msg);
996 intptr_t p0 = (p1 & ~kSmiTagMask) + kSmiTag; 996 intptr_t p0 = (p1 & ~kSmiTagMask) + kSmiTag;
997 ASSERT(reinterpret_cast<Object*>(p0)->IsSmi()); 997 ASSERT(reinterpret_cast<Object*>(p0)->IsSmi());
998 #ifdef DEBUG 998 #ifdef DEBUG
999 if (msg != NULL) { 999 if (msg != NULL) {
1000 RecordComment("Abort message: "); 1000 RecordComment("Abort message: ");
1001 RecordComment(msg); 1001 RecordComment(msg);
1002 } 1002 }
1003 #endif 1003 #endif
1004 push(eax); 1004 push(eax);
1005 push(Immediate(p0)); 1005 push(Immediate(p0));
1006 push(Immediate(reinterpret_cast<intptr_t>(Smi::FromInt(p1 - p0)))); 1006 push(Immediate(reinterpret_cast<intptr_t>(Smi::FromInt(p1 - p0))));
1007 CallRuntime(Runtime::kAbort, 2); 1007 CallRuntime(Runtime::kAbort, 2);
1008 // will not return here 1008 // will not return here
1009 } 1009 }
1010 1010
1011 1011
1012 CodePatcher::CodePatcher(byte* address, int size) 1012 CodePatcher::CodePatcher(byte* address, int size)
1013 : address_(address), size_(size), masm_(address, size + Assembler::kGap) { 1013 : address_(address), size_(size), masm_(address, size + Assembler::kGap) {
1014 // Create a new macro assembler pointing to the assress of the code to patch. 1014 // Create a new macro assembler pointing to the address of the code to patch.
1015 // The size is adjusted with kGap on order for the assembler to generate size 1015 // The size is adjusted with kGap on order for the assembler to generate size
1016 // bytes of instructions without failing with buffer size constraints. 1016 // bytes of instructions without failing with buffer size constraints.
1017 ASSERT(masm_.reloc_info_writer.pos() == address_ + size_ + Assembler::kGap); 1017 ASSERT(masm_.reloc_info_writer.pos() == address_ + size_ + Assembler::kGap);
1018 } 1018 }
1019 1019
1020 1020
1021 CodePatcher::~CodePatcher() { 1021 CodePatcher::~CodePatcher() {
1022 // Indicate that code has changed. 1022 // Indicate that code has changed.
1023 CPU::FlushICache(address_, size_); 1023 CPU::FlushICache(address_, size_);
1024 1024
1025 // Check that the code was patched as expected. 1025 // Check that the code was patched as expected.
1026 ASSERT(masm_.pc_ == address_ + size_); 1026 ASSERT(masm_.pc_ == address_ + size_);
1027 ASSERT(masm_.reloc_info_writer.pos() == address_ + size_ + Assembler::kGap); 1027 ASSERT(masm_.reloc_info_writer.pos() == address_ + size_ + Assembler::kGap);
1028 } 1028 }
1029 1029
1030 1030
1031 } } // namespace v8::internal 1031 } } // namespace v8::internal
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