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Issue 6359015: Revert "Unification: introduce ExternalReference::pending_exception_address()." (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Created 9 years, 11 months 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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2119 NearLabel failure; 2119 NearLabel failure;
2120 __ cmpl(rax, Immediate(NativeRegExpMacroAssembler::FAILURE)); 2120 __ cmpl(rax, Immediate(NativeRegExpMacroAssembler::FAILURE));
2121 __ j(equal, &failure); 2121 __ j(equal, &failure);
2122 __ cmpl(rax, Immediate(NativeRegExpMacroAssembler::EXCEPTION)); 2122 __ cmpl(rax, Immediate(NativeRegExpMacroAssembler::EXCEPTION));
2123 // If not exception it can only be retry. Handle that in the runtime system. 2123 // If not exception it can only be retry. Handle that in the runtime system.
2124 __ j(not_equal, &runtime); 2124 __ j(not_equal, &runtime);
2125 // Result must now be exception. If there is no pending exception already a 2125 // Result must now be exception. If there is no pending exception already a
2126 // stack overflow (on the backtrack stack) was detected in RegExp code but 2126 // stack overflow (on the backtrack stack) was detected in RegExp code but
2127 // haven't created the exception yet. Handle that in the runtime system. 2127 // haven't created the exception yet. Handle that in the runtime system.
2128 // TODO(592): Rerunning the RegExp to get the stack overflow exception. 2128 // TODO(592): Rerunning the RegExp to get the stack overflow exception.
2129 __ movq(kScratchRegister, ExternalReference::pending_exception_address()); 2129 ExternalReference pending_exception_address(Top::k_pending_exception_address);
2130 __ movq(kScratchRegister, pending_exception_address);
2130 __ Cmp(kScratchRegister, Factory::the_hole_value()); 2131 __ Cmp(kScratchRegister, Factory::the_hole_value());
2131 __ j(equal, &runtime); 2132 __ j(equal, &runtime);
2132 __ bind(&failure); 2133 __ bind(&failure);
2133 // For failure and exception return null. 2134 // For failure and exception return null.
2134 __ Move(rax, Factory::null_value()); 2135 __ Move(rax, Factory::null_value());
2135 __ ret(4 * kPointerSize); 2136 __ ret(4 * kPointerSize);
2136 2137
2137 // Load RegExp data. 2138 // Load RegExp data.
2138 __ bind(&success); 2139 __ bind(&success);
2139 __ movq(rax, Operand(rsp, kJSRegExpOffset)); 2140 __ movq(rax, Operand(rsp, kJSRegExpOffset));
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2877 STATIC_ASSERT(Failure::RETRY_AFTER_GC == 0); 2878 STATIC_ASSERT(Failure::RETRY_AFTER_GC == 0);
2878 __ testl(rax, Immediate(((1 << kFailureTypeTagSize) - 1) << kFailureTagSize)); 2879 __ testl(rax, Immediate(((1 << kFailureTypeTagSize) - 1) << kFailureTagSize));
2879 __ j(zero, &retry); 2880 __ j(zero, &retry);
2880 2881
2881 // Special handling of out of memory exceptions. 2882 // Special handling of out of memory exceptions.
2882 __ movq(kScratchRegister, Failure::OutOfMemoryException(), RelocInfo::NONE); 2883 __ movq(kScratchRegister, Failure::OutOfMemoryException(), RelocInfo::NONE);
2883 __ cmpq(rax, kScratchRegister); 2884 __ cmpq(rax, kScratchRegister);
2884 __ j(equal, throw_out_of_memory_exception); 2885 __ j(equal, throw_out_of_memory_exception);
2885 2886
2886 // Retrieve the pending exception and clear the variable. 2887 // Retrieve the pending exception and clear the variable.
2887 __ movq(kScratchRegister, ExternalReference::pending_exception_address()); 2888 ExternalReference pending_exception_address(Top::k_pending_exception_address);
2889 __ movq(kScratchRegister, pending_exception_address);
2888 __ movq(rax, Operand(kScratchRegister, 0)); 2890 __ movq(rax, Operand(kScratchRegister, 0));
2889 __ movq(rdx, ExternalReference::the_hole_value_location()); 2891 __ movq(rdx, ExternalReference::the_hole_value_location());
2890 __ movq(rdx, Operand(rdx, 0)); 2892 __ movq(rdx, Operand(rdx, 0));
2891 __ movq(Operand(kScratchRegister, 0), rdx); 2893 __ movq(Operand(kScratchRegister, 0), rdx);
2892 2894
2893 // Special handling of termination exceptions which are uncatchable 2895 // Special handling of termination exceptions which are uncatchable
2894 // by javascript code. 2896 // by javascript code.
2895 __ CompareRoot(rax, Heap::kTerminationExceptionRootIndex); 2897 __ CompareRoot(rax, Heap::kTerminationExceptionRootIndex);
2896 __ j(equal, throw_termination_exception); 2898 __ j(equal, throw_termination_exception);
2897 2899
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2927 __ movq(kScratchRegister, handler_address); 2929 __ movq(kScratchRegister, handler_address);
2928 __ pop(Operand(kScratchRegister, 0)); 2930 __ pop(Operand(kScratchRegister, 0));
2929 2931
2930 if (type == OUT_OF_MEMORY) { 2932 if (type == OUT_OF_MEMORY) {
2931 // Set external caught exception to false. 2933 // Set external caught exception to false.
2932 ExternalReference external_caught(Top::k_external_caught_exception_address); 2934 ExternalReference external_caught(Top::k_external_caught_exception_address);
2933 __ movq(rax, Immediate(false)); 2935 __ movq(rax, Immediate(false));
2934 __ store_rax(external_caught); 2936 __ store_rax(external_caught);
2935 2937
2936 // Set pending exception and rax to out of memory exception. 2938 // Set pending exception and rax to out of memory exception.
2939 ExternalReference pending_exception(Top::k_pending_exception_address);
2937 __ movq(rax, Failure::OutOfMemoryException(), RelocInfo::NONE); 2940 __ movq(rax, Failure::OutOfMemoryException(), RelocInfo::NONE);
2938 __ store_rax(ExternalReference::pending_exception_address()); 2941 __ store_rax(pending_exception);
2939 } 2942 }
2940 2943
2941 // Clear the context pointer. 2944 // Clear the context pointer.
2942 __ Set(rsi, 0); 2945 __ Set(rsi, 0);
2943 2946
2944 // Restore registers from handler. 2947 // Restore registers from handler.
2945 STATIC_ASSERT(StackHandlerConstants::kNextOffset + kPointerSize == 2948 STATIC_ASSERT(StackHandlerConstants::kNextOffset + kPointerSize ==
2946 StackHandlerConstants::kFPOffset); 2949 StackHandlerConstants::kFPOffset);
2947 __ pop(rbp); // FP 2950 __ pop(rbp); // FP
2948 STATIC_ASSERT(StackHandlerConstants::kFPOffset + kPointerSize == 2951 STATIC_ASSERT(StackHandlerConstants::kFPOffset + kPointerSize ==
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3081 __ movq(rax, rbp); 3084 __ movq(rax, rbp);
3082 __ store_rax(js_entry_sp); 3085 __ store_rax(js_entry_sp);
3083 __ bind(&not_outermost_js); 3086 __ bind(&not_outermost_js);
3084 #endif 3087 #endif
3085 3088
3086 // Call a faked try-block that does the invoke. 3089 // Call a faked try-block that does the invoke.
3087 __ call(&invoke); 3090 __ call(&invoke);
3088 3091
3089 // Caught exception: Store result (exception) in the pending 3092 // Caught exception: Store result (exception) in the pending
3090 // exception field in the JSEnv and return a failure sentinel. 3093 // exception field in the JSEnv and return a failure sentinel.
3091 __ store_rax(ExternalReference::pending_exception_address()); 3094 ExternalReference pending_exception(Top::k_pending_exception_address);
3095 __ store_rax(pending_exception);
3092 __ movq(rax, Failure::Exception(), RelocInfo::NONE); 3096 __ movq(rax, Failure::Exception(), RelocInfo::NONE);
3093 __ jmp(&exit); 3097 __ jmp(&exit);
3094 3098
3095 // Invoke: Link this frame into the handler chain. 3099 // Invoke: Link this frame into the handler chain.
3096 __ bind(&invoke); 3100 __ bind(&invoke);
3097 __ PushTryHandler(IN_JS_ENTRY, JS_ENTRY_HANDLER); 3101 __ PushTryHandler(IN_JS_ENTRY, JS_ENTRY_HANDLER);
3098 3102
3099 // Clear any pending exceptions. 3103 // Clear any pending exceptions.
3100 __ load_rax(ExternalReference::the_hole_value_location()); 3104 __ load_rax(ExternalReference::the_hole_value_location());
3101 __ store_rax(ExternalReference::pending_exception_address()); 3105 __ store_rax(pending_exception);
3102 3106
3103 // Fake a receiver (NULL). 3107 // Fake a receiver (NULL).
3104 __ push(Immediate(0)); // receiver 3108 __ push(Immediate(0)); // receiver
3105 3109
3106 // Invoke the function by calling through JS entry trampoline 3110 // Invoke the function by calling through JS entry trampoline
3107 // builtin and pop the faked function when we return. We load the address 3111 // builtin and pop the faked function when we return. We load the address
3108 // from an external reference instead of inlining the call target address 3112 // from an external reference instead of inlining the call target address
3109 // directly in the code, because the builtin stubs may not have been 3113 // directly in the code, because the builtin stubs may not have been
3110 // generated yet at the time this code is generated. 3114 // generated yet at the time this code is generated.
3111 if (is_construct) { 3115 if (is_construct) {
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4386 4390
4387 // Do a tail call to the rewritten stub. 4391 // Do a tail call to the rewritten stub.
4388 __ jmp(rdi); 4392 __ jmp(rdi);
4389 } 4393 }
4390 4394
4391 #undef __ 4395 #undef __
4392 4396
4393 } } // namespace v8::internal 4397 } } // namespace v8::internal
4394 4398
4395 #endif // V8_TARGET_ARCH_X64 4399 #endif // V8_TARGET_ARCH_X64
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