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Issue 8538011: Reapply "Add a level of indirection to exception handler addresses." (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Created 9 years, 1 month ago
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1 // Copyright 2011 the V8 project authors. All rights reserved. 1 // Copyright 2011 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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3705 } 3705 }
3706 3706
3707 3707
3708 void JSEntryStub::GenerateBody(MacroAssembler* masm, bool is_construct) { 3708 void JSEntryStub::GenerateBody(MacroAssembler* masm, bool is_construct) {
3709 // r0: code entry 3709 // r0: code entry
3710 // r1: function 3710 // r1: function
3711 // r2: receiver 3711 // r2: receiver
3712 // r3: argc 3712 // r3: argc
3713 // [sp+0]: argv 3713 // [sp+0]: argv
3714 3714
3715 Label invoke, exit; 3715 Label invoke, handler_entry, exit;
3716 3716
3717 // Called from C, so do not pop argc and args on exit (preserve sp) 3717 // Called from C, so do not pop argc and args on exit (preserve sp)
3718 // No need to save register-passed args 3718 // No need to save register-passed args
3719 // Save callee-saved registers (incl. cp and fp), sp, and lr 3719 // Save callee-saved registers (incl. cp and fp), sp, and lr
3720 __ stm(db_w, sp, kCalleeSaved | lr.bit()); 3720 __ stm(db_w, sp, kCalleeSaved | lr.bit());
3721 3721
3722 if (CpuFeatures::IsSupported(VFP3)) { 3722 if (CpuFeatures::IsSupported(VFP3)) {
3723 CpuFeatures::Scope scope(VFP3); 3723 CpuFeatures::Scope scope(VFP3);
3724 // Save callee-saved vfp registers. 3724 // Save callee-saved vfp registers.
3725 __ vstm(db_w, sp, kFirstCalleeSavedDoubleReg, kLastCalleeSavedDoubleReg); 3725 __ vstm(db_w, sp, kFirstCalleeSavedDoubleReg, kLastCalleeSavedDoubleReg);
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3768 __ b(ne, &non_outermost_js); 3768 __ b(ne, &non_outermost_js);
3769 __ str(fp, MemOperand(r5)); 3769 __ str(fp, MemOperand(r5));
3770 __ mov(ip, Operand(Smi::FromInt(StackFrame::OUTERMOST_JSENTRY_FRAME))); 3770 __ mov(ip, Operand(Smi::FromInt(StackFrame::OUTERMOST_JSENTRY_FRAME)));
3771 Label cont; 3771 Label cont;
3772 __ b(&cont); 3772 __ b(&cont);
3773 __ bind(&non_outermost_js); 3773 __ bind(&non_outermost_js);
3774 __ mov(ip, Operand(Smi::FromInt(StackFrame::INNER_JSENTRY_FRAME))); 3774 __ mov(ip, Operand(Smi::FromInt(StackFrame::INNER_JSENTRY_FRAME)));
3775 __ bind(&cont); 3775 __ bind(&cont);
3776 __ push(ip); 3776 __ push(ip);
3777 3777
3778 // Call a faked try-block that does the invoke. 3778 // Jump to a faked try block that does the invoke, with a faked catch
3779 __ bl(&invoke); 3779 // block that sets the pending exception.
3780 3780 __ jmp(&invoke);
3781 // Caught exception: Store result (exception) in the pending 3781 __ bind(&handler_entry);
3782 // exception field in the JSEnv and return a failure sentinel. 3782 handler_offset_ = handler_entry.pos();
3783 // Coming in here the fp will be invalid because the PushTryHandler below 3783 // Caught exception: Store result (exception) in the pending exception
3784 // sets it to 0 to signal the existence of the JSEntry frame. 3784 // field in the JSEnv and return a failure sentinel. Coming in here the
3785 // fp will be invalid because the PushTryHandler below sets it to 0 to
3786 // signal the existence of the JSEntry frame.
3785 __ mov(ip, Operand(ExternalReference(Isolate::kPendingExceptionAddress, 3787 __ mov(ip, Operand(ExternalReference(Isolate::kPendingExceptionAddress,
3786 isolate))); 3788 isolate)));
3787 __ str(r0, MemOperand(ip)); 3789 __ str(r0, MemOperand(ip));
3788 __ mov(r0, Operand(reinterpret_cast<int32_t>(Failure::Exception()))); 3790 __ mov(r0, Operand(reinterpret_cast<int32_t>(Failure::Exception())));
3789 __ b(&exit); 3791 __ b(&exit);
3790 3792
3791 // Invoke: Link this frame into the handler chain. 3793 // Invoke: Link this frame into the handler chain. There's only one
3794 // handler block in this code object, so its index is 0.
3792 __ bind(&invoke); 3795 __ bind(&invoke);
3793 // Must preserve r0-r4, r5-r7 are available. 3796 // Must preserve r0-r4, r5-r7 are available.
3794 __ PushTryHandler(IN_JS_ENTRY, JS_ENTRY_HANDLER); 3797 __ PushTryHandler(IN_JS_ENTRY, JS_ENTRY_HANDLER, 0);
3795 // If an exception not caught by another handler occurs, this handler 3798 // If an exception not caught by another handler occurs, this handler
3796 // returns control to the code after the bl(&invoke) above, which 3799 // returns control to the code after the bl(&invoke) above, which
3797 // restores all kCalleeSaved registers (including cp and fp) to their 3800 // restores all kCalleeSaved registers (including cp and fp) to their
3798 // saved values before returning a failure to C. 3801 // saved values before returning a failure to C.
3799 3802
3800 // Clear any pending exceptions. 3803 // Clear any pending exceptions.
3801 __ mov(r5, Operand(isolate->factory()->the_hole_value())); 3804 __ mov(r5, Operand(isolate->factory()->the_hole_value()));
3802 __ mov(ip, Operand(ExternalReference(Isolate::kPendingExceptionAddress, 3805 __ mov(ip, Operand(ExternalReference(Isolate::kPendingExceptionAddress,
3803 isolate))); 3806 isolate)));
3804 __ str(r5, MemOperand(ip)); 3807 __ str(r5, MemOperand(ip));
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4893 4896
4894 __ bind(&done); 4897 __ bind(&done);
4895 __ add(sp, sp, Operand(3 * kPointerSize)); 4898 __ add(sp, sp, Operand(3 * kPointerSize));
4896 __ Ret(); 4899 __ Ret();
4897 4900
4898 __ bind(&slowcase); 4901 __ bind(&slowcase);
4899 __ TailCallRuntime(Runtime::kRegExpConstructResult, 3, 1); 4902 __ TailCallRuntime(Runtime::kRegExpConstructResult, 3, 1);
4900 } 4903 }
4901 4904
4902 4905
4903 void CallFunctionStub::FinishCode(Code* code) { 4906 void CallFunctionStub::FinishCode(Handle<Code> code) {
4904 code->set_has_function_cache(false); 4907 code->set_has_function_cache(false);
4905 } 4908 }
4906 4909
4907 4910
4908 void CallFunctionStub::Clear(Heap* heap, Address address) { 4911 void CallFunctionStub::Clear(Heap* heap, Address address) {
4909 UNREACHABLE(); 4912 UNREACHABLE();
4910 } 4913 }
4911 4914
4912 4915
4913 Object* CallFunctionStub::GetCachedValue(Address address) { 4916 Object* CallFunctionStub::GetCachedValue(Address address) {
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7119 __ bind(&need_incremental); 7122 __ bind(&need_incremental);
7120 7123
7121 // Fall through when we need to inform the incremental marker. 7124 // Fall through when we need to inform the incremental marker.
7122 } 7125 }
7123 7126
7124 #undef __ 7127 #undef __
7125 7128
7126 } } // namespace v8::internal 7129 } } // namespace v8::internal
7127 7130
7128 #endif // V8_TARGET_ARCH_ARM 7131 #endif // V8_TARGET_ARCH_ARM
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