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Issue 10695206: Revert 12083: Implements a new API to set a function entry hook for profiling. (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Created 8 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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6413 __ movq(r9, FieldOperand(rbx, JSObject::kElementsOffset)); 6413 __ movq(r9, FieldOperand(rbx, JSObject::kElementsOffset));
6414 __ SmiToInteger32(r11, rcx); 6414 __ SmiToInteger32(r11, rcx);
6415 __ StoreNumberToDoubleElements(rax, 6415 __ StoreNumberToDoubleElements(rax,
6416 r9, 6416 r9,
6417 r11, 6417 r11,
6418 xmm0, 6418 xmm0,
6419 &slow_elements); 6419 &slow_elements);
6420 __ ret(0); 6420 __ ret(0);
6421 } 6421 }
6422 6422
6423
6424 void ProfileEntryHookStub::MaybeCallEntryHook(MacroAssembler* masm) {
6425 if (entry_hook_ != NULL) {
6426 ProfileEntryHookStub stub;
6427 masm->CallStub(&stub);
6428 }
6429 }
6430
6431
6432 void ProfileEntryHookStub::Generate(MacroAssembler* masm) {
6433 // Save volatile registers.
6434 #ifdef _WIN64
6435 const int kNumSavedRegisters = 1;
6436
6437 __ push(rcx);
6438 #else
6439 const int kNumSavedRegisters = 3;
6440
6441 __ push(rcx);
6442 __ push(rdi);
6443 __ push(rsi);
6444 #endif
6445
6446 // Calculate the original stack pointer and store it in the second arg.
6447 #ifdef _WIN64
6448 __ lea(rdx, Operand(rsp, kNumSavedRegisters * kPointerSize));
6449 #else
6450 __ lea(rsi, Operand(rsp, kNumSavedRegisters * kPointerSize));
6451 #endif
6452
6453 // Calculate the function address to the first arg.
6454 #ifdef _WIN64
6455 __ movq(rcx, Operand(rdx, 0));
6456 __ subq(rcx, Immediate(Assembler::kShortCallInstructionLength));
6457 #else
6458 __ movq(rdi, Operand(rsi, 0));
6459 __ subq(rdi, Immediate(Assembler::kShortCallInstructionLength));
6460 #endif
6461
6462 // Reserve stack for the first 4 args and align the stack.
6463 __ movq(kScratchRegister, rsp);
6464 __ subq(rsp, Immediate(4 * kPointerSize));
6465 int frame_alignment = OS::ActivationFrameAlignment();
6466 ASSERT(IsPowerOf2(frame_alignment));
6467 __ and_(rsp, Immediate(-frame_alignment));
6468
6469 // Call the entry hook.
6470 int64_t hook_location = reinterpret_cast<int64_t>(&entry_hook_);
6471 __ movq(rax, hook_location, RelocInfo::NONE);
6472 __ call(Operand(rax, 0));
6473 __ movq(rsp, kScratchRegister);
6474
6475 // Restore volatile regs.
6476 #ifdef _WIN64
6477 __ pop(rcx);
6478 #else
6479 __ pop(rsi);
6480 __ pop(rdi);
6481 __ pop(rcx);
6482 #endif
6483 }
6484
6485 #undef __ 6423 #undef __
6486 6424
6487 } } // namespace v8::internal 6425 } } // namespace v8::internal
6488 6426
6489 #endif // V8_TARGET_ARCH_X64 6427 #endif // V8_TARGET_ARCH_X64
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