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Issue 19383002: Make deoptimization stress count global. (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Rebase. Created 7 years, 5 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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925 int id = environment->deoptimization_index(); 925 int id = environment->deoptimization_index();
926 ASSERT(info()->IsOptimizing() || info()->IsStub()); 926 ASSERT(info()->IsOptimizing() || info()->IsStub());
927 Address entry = 927 Address entry =
928 Deoptimizer::GetDeoptimizationEntry(isolate(), id, bailout_type); 928 Deoptimizer::GetDeoptimizationEntry(isolate(), id, bailout_type);
929 if (entry == NULL) { 929 if (entry == NULL) {
930 Abort("bailout was not prepared"); 930 Abort("bailout was not prepared");
931 return; 931 return;
932 } 932 }
933 933
934 if (FLAG_deopt_every_n_times != 0 && !info()->IsStub()) { 934 if (FLAG_deopt_every_n_times != 0 && !info()->IsStub()) {
935 Handle<SharedFunctionInfo> shared(info()->shared_info()); 935 ExternalReference count = ExternalReference::stress_deopt_count(isolate());
936 Label no_deopt; 936 Label no_deopt;
937 __ pushfd(); 937 __ pushfd();
938 __ push(eax); 938 __ push(eax);
939 __ push(ebx); 939 __ mov(eax, Operand::StaticVariable(count));
940 __ mov(ebx, shared); 940 __ sub(eax, Immediate(1));
941 __ mov(eax,
942 FieldOperand(ebx, SharedFunctionInfo::kStressDeoptCounterOffset));
943 __ sub(Operand(eax), Immediate(Smi::FromInt(1)));
944 __ j(not_zero, &no_deopt, Label::kNear); 941 __ j(not_zero, &no_deopt, Label::kNear);
945 if (FLAG_trap_on_deopt) __ int3(); 942 if (FLAG_trap_on_deopt) __ int3();
946 __ mov(eax, Immediate(Smi::FromInt(FLAG_deopt_every_n_times))); 943 __ mov(eax, Immediate(FLAG_deopt_every_n_times));
947 __ mov(FieldOperand(ebx, SharedFunctionInfo::kStressDeoptCounterOffset), 944 __ mov(Operand::StaticVariable(count), eax);
948 eax);
949 __ pop(ebx);
950 __ pop(eax); 945 __ pop(eax);
951 __ popfd(); 946 __ popfd();
952 ASSERT(frame_is_built_); 947 ASSERT(frame_is_built_);
953 __ call(entry, RelocInfo::RUNTIME_ENTRY); 948 __ call(entry, RelocInfo::RUNTIME_ENTRY);
954
955 __ bind(&no_deopt); 949 __ bind(&no_deopt);
956 __ mov(FieldOperand(ebx, SharedFunctionInfo::kStressDeoptCounterOffset), 950 __ mov(Operand::StaticVariable(count), eax);
957 eax);
958 __ pop(ebx);
959 __ pop(eax); 951 __ pop(eax);
960 __ popfd(); 952 __ popfd();
961 } 953 }
962 954
963 // Before Instructions which can deopt, we normally flush the x87 stack. But 955 // Before Instructions which can deopt, we normally flush the x87 stack. But
964 // we can have inputs or outputs of the current instruction on the stack, 956 // we can have inputs or outputs of the current instruction on the stack,
965 // thus we need to flush them here from the physical stack to leave it in a 957 // thus we need to flush them here from the physical stack to leave it in a
966 // consistent state. 958 // consistent state.
967 if (x87_stack_depth_ > 0) { 959 if (x87_stack_depth_ > 0) {
968 Label done; 960 Label done;
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6497 FixedArray::kHeaderSize - kPointerSize)); 6489 FixedArray::kHeaderSize - kPointerSize));
6498 __ bind(&done); 6490 __ bind(&done);
6499 } 6491 }
6500 6492
6501 6493
6502 #undef __ 6494 #undef __
6503 6495
6504 } } // namespace v8::internal 6496 } } // namespace v8::internal
6505 6497
6506 #endif // V8_TARGET_ARCH_IA32 6498 #endif // V8_TARGET_ARCH_IA32
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