| /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- |
| * vim: set ts=8 sts=4 et sw=4 tw=99: |
| * This Source Code Form is subject to the terms of the Mozilla Public |
| * License, v. 2.0. If a copy of the MPL was not distributed with this |
| * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| |
| #include "mozilla/DebugOnly.h" |
| |
| #include "jscompartment.h" |
| |
| #include "jit/Bailouts.h" |
| #include "jit/JitCompartment.h" |
| #include "jit/JitFrames.h" |
| #include "jit/JitSpewer.h" |
| #include "jit/Linker.h" |
| #include "jit/mips64/Bailouts-mips64.h" |
| #include "jit/mips64/SharedICHelpers-mips64.h" |
| #ifdef JS_ION_PERF |
| # include "jit/PerfSpewer.h" |
| #endif |
| #include "jit/VMFunctions.h" |
| |
| #include "jit/MacroAssembler-inl.h" |
| |
| using namespace js; |
| using namespace js::jit; |
| |
| // All registers to save and restore. This includes the stack pointer, since we |
| // use the ability to reference register values on the stack by index. |
| static const LiveRegisterSet AllRegs = |
| LiveRegisterSet(GeneralRegisterSet(Registers::AllMask), |
| FloatRegisterSet(FloatRegisters::AllMask)); |
| |
| static_assert(sizeof(uintptr_t) == sizeof(uint64_t), "Not 32-bit clean."); |
| |
| struct EnterJITRegs |
| { |
| double f31; |
| double f30; |
| double f29; |
| double f28; |
| double f27; |
| double f26; |
| double f25; |
| double f24; |
| |
| // non-volatile registers. |
| uint64_t ra; |
| uint64_t s7; |
| uint64_t s6; |
| uint64_t s5; |
| uint64_t s4; |
| uint64_t s3; |
| uint64_t s2; |
| uint64_t s1; |
| uint64_t s0; |
| // Save reg_vp(a7) on stack, use it after call jit code. |
| uint64_t a7; |
| }; |
| |
| static void |
| GenerateReturn(MacroAssembler& masm, int returnCode) |
| { |
| MOZ_ASSERT(masm.framePushed() == sizeof(EnterJITRegs)); |
| |
| // Restore non-volatile registers |
| masm.as_ld(s0, StackPointer, offsetof(EnterJITRegs, s0)); |
| masm.as_ld(s1, StackPointer, offsetof(EnterJITRegs, s1)); |
| masm.as_ld(s2, StackPointer, offsetof(EnterJITRegs, s2)); |
| masm.as_ld(s3, StackPointer, offsetof(EnterJITRegs, s3)); |
| masm.as_ld(s4, StackPointer, offsetof(EnterJITRegs, s4)); |
| masm.as_ld(s5, StackPointer, offsetof(EnterJITRegs, s5)); |
| masm.as_ld(s6, StackPointer, offsetof(EnterJITRegs, s6)); |
| masm.as_ld(s7, StackPointer, offsetof(EnterJITRegs, s7)); |
| masm.as_ld(ra, StackPointer, offsetof(EnterJITRegs, ra)); |
| |
| // Restore non-volatile floating point registers |
| masm.as_ld(f24, StackPointer, offsetof(EnterJITRegs, f24)); |
| masm.as_ld(f25, StackPointer, offsetof(EnterJITRegs, f25)); |
| masm.as_ld(f26, StackPointer, offsetof(EnterJITRegs, f26)); |
| masm.as_ld(f27, StackPointer, offsetof(EnterJITRegs, f27)); |
| masm.as_ld(f28, StackPointer, offsetof(EnterJITRegs, f28)); |
| masm.as_ld(f29, StackPointer, offsetof(EnterJITRegs, f29)); |
| masm.as_ld(f30, StackPointer, offsetof(EnterJITRegs, f30)); |
| masm.as_ld(f31, StackPointer, offsetof(EnterJITRegs, f31)); |
| |
| masm.freeStack(sizeof(EnterJITRegs)); |
| |
| masm.branch(ra); |
| } |
| |
| static void |
| GeneratePrologue(MacroAssembler& masm) |
| { |
| masm.reserveStack(sizeof(EnterJITRegs)); |
| |
| masm.as_sd(s0, StackPointer, offsetof(EnterJITRegs, s0)); |
| masm.as_sd(s1, StackPointer, offsetof(EnterJITRegs, s1)); |
| masm.as_sd(s2, StackPointer, offsetof(EnterJITRegs, s2)); |
| masm.as_sd(s3, StackPointer, offsetof(EnterJITRegs, s3)); |
| masm.as_sd(s4, StackPointer, offsetof(EnterJITRegs, s4)); |
| masm.as_sd(s5, StackPointer, offsetof(EnterJITRegs, s5)); |
| masm.as_sd(s6, StackPointer, offsetof(EnterJITRegs, s6)); |
| masm.as_sd(s7, StackPointer, offsetof(EnterJITRegs, s7)); |
| masm.as_sd(ra, StackPointer, offsetof(EnterJITRegs, ra)); |
| masm.as_sd(a7, StackPointer, offsetof(EnterJITRegs, a7)); |
| |
| masm.as_sd(f24, StackPointer, offsetof(EnterJITRegs, f24)); |
| masm.as_sd(f25, StackPointer, offsetof(EnterJITRegs, f25)); |
| masm.as_sd(f26, StackPointer, offsetof(EnterJITRegs, f26)); |
| masm.as_sd(f27, StackPointer, offsetof(EnterJITRegs, f27)); |
| masm.as_sd(f28, StackPointer, offsetof(EnterJITRegs, f28)); |
| masm.as_sd(f29, StackPointer, offsetof(EnterJITRegs, f29)); |
| masm.as_sd(f30, StackPointer, offsetof(EnterJITRegs, f30)); |
| masm.as_sd(f31, StackPointer, offsetof(EnterJITRegs, f31)); |
| } |
| |
| |
| // Generates a trampoline for calling Jit compiled code from a C++ function. |
| // The trampoline use the EnterJitCode signature, with the standard x64 fastcall |
| // calling convention. |
| JitCode * |
| JitRuntime::generateEnterJIT(JSContext* cx, EnterJitType type) |
| { |
| const Register reg_code = IntArgReg0; |
| const Register reg_argc = IntArgReg1; |
| const Register reg_argv = IntArgReg2; |
| const mozilla::DebugOnly<Register> reg_frame = IntArgReg3; |
| const Register reg_token = IntArgReg4; |
| const Register reg_chain = IntArgReg5; |
| const Register reg_values = IntArgReg6; |
| const Register reg_vp = IntArgReg7; |
| MacroAssembler masm(cx); |
| |
| MOZ_ASSERT(OsrFrameReg == reg_frame); |
| |
| GeneratePrologue(masm); |
| |
| // Save stack pointer into s4 |
| masm.movePtr(StackPointer, s4); |
| |
| // Save stack pointer as baseline frame. |
| if (type == EnterJitBaseline) |
| masm.movePtr(StackPointer, BaselineFrameReg); |
| |
| // Load the number of actual arguments into s3. |
| masm.unboxInt32(Address(reg_vp, 0), s3); |
| |
| /*************************************************************** |
| Loop over argv vector, push arguments onto stack in reverse order |
| ***************************************************************/ |
| |
| // if we are constructing, that also needs to include newTarget |
| { |
| Label noNewTarget; |
| masm.branchTest32(Assembler::Zero, reg_token, Imm32(CalleeToken_FunctionConstructing), |
| &noNewTarget); |
| |
| masm.add32(Imm32(1), reg_argc); |
| |
| masm.bind(&noNewTarget); |
| } |
| |
| // Make stack algined |
| masm.ma_and(s0, reg_argc, Imm32(1)); |
| masm.ma_dsubu(s1, StackPointer, Imm32(sizeof(Value))); |
| masm.as_movn(StackPointer, s1, s0); |
| |
| masm.as_dsll(s0, reg_argc, 3); // Value* argv |
| masm.addPtr(reg_argv, s0); // s0 = &argv[argc] |
| |
| // Loop over arguments, copying them from an unknown buffer onto the Ion |
| // stack so they can be accessed from JIT'ed code. |
| Label header, footer; |
| // If there aren't any arguments, don't do anything |
| masm.ma_b(s0, reg_argv, &footer, Assembler::BelowOrEqual, ShortJump); |
| { |
| masm.bind(&header); |
| |
| masm.subPtr(Imm32(sizeof(Value)), s0); |
| masm.subPtr(Imm32(sizeof(Value)), StackPointer); |
| |
| ValueOperand value = ValueOperand(s6); |
| masm.loadValue(Address(s0, 0), value); |
| masm.storeValue(value, Address(StackPointer, 0)); |
| |
| masm.ma_b(s0, reg_argv, &header, Assembler::Above, ShortJump); |
| } |
| masm.bind(&footer); |
| |
| masm.subPtr(Imm32(2 * sizeof(uintptr_t)), StackPointer); |
| masm.storePtr(s3, Address(StackPointer, sizeof(uintptr_t))); // actual arguments |
| masm.storePtr(reg_token, Address(StackPointer, 0)); // callee token |
| |
| masm.subPtr(StackPointer, s4); |
| masm.makeFrameDescriptor(s4, JitFrame_Entry); |
| masm.push(s4); // descriptor |
| |
| CodeLabel returnLabel; |
| CodeLabel oomReturnLabel; |
| if (type == EnterJitBaseline) { |
| // Handle OSR. |
| AllocatableGeneralRegisterSet regs(GeneralRegisterSet::All()); |
| regs.take(OsrFrameReg); |
| regs.take(BaselineFrameReg); |
| regs.take(reg_code); |
| regs.take(ReturnReg); |
| regs.take(JSReturnOperand); |
| |
| Label notOsr; |
| masm.ma_b(OsrFrameReg, OsrFrameReg, ¬Osr, Assembler::Zero, ShortJump); |
| |
| Register numStackValues = reg_values; |
| regs.take(numStackValues); |
| Register scratch = regs.takeAny(); |
| |
| // Push return address. |
| masm.subPtr(Imm32(sizeof(uintptr_t)), StackPointer); |
| masm.ma_li(scratch, returnLabel.patchAt()); |
| masm.storePtr(scratch, Address(StackPointer, 0)); |
| |
| // Push previous frame pointer. |
| masm.subPtr(Imm32(sizeof(uintptr_t)), StackPointer); |
| masm.storePtr(BaselineFrameReg, Address(StackPointer, 0)); |
| |
| // Reserve frame. |
| Register framePtr = BaselineFrameReg; |
| masm.subPtr(Imm32(BaselineFrame::Size()), StackPointer); |
| masm.movePtr(StackPointer, framePtr); |
| |
| // Reserve space for locals and stack values. |
| masm.ma_dsll(scratch, numStackValues, Imm32(3)); |
| masm.subPtr(scratch, StackPointer); |
| |
| // Enter exit frame. |
| masm.addPtr(Imm32(BaselineFrame::Size() + BaselineFrame::FramePointerOffset), scratch); |
| masm.makeFrameDescriptor(scratch, JitFrame_BaselineJS); |
| |
| // Push frame descriptor and fake return address. |
| masm.reserveStack(2 * sizeof(uintptr_t)); |
| masm.storePtr(scratch, Address(StackPointer, sizeof(uintptr_t))); // Frame descriptor |
| masm.storePtr(zero, Address(StackPointer, 0)); // fake return address |
| |
| // No GC things to mark, push a bare token. |
| masm.enterFakeExitFrame(ExitFrameLayoutBareToken); |
| |
| masm.reserveStack(2 * sizeof(uintptr_t)); |
| masm.storePtr(framePtr, Address(StackPointer, sizeof(uintptr_t))); // BaselineFrame |
| masm.storePtr(reg_code, Address(StackPointer, 0)); // jitcode |
| |
| masm.setupUnalignedABICall(scratch); |
| masm.passABIArg(BaselineFrameReg); // BaselineFrame |
| masm.passABIArg(OsrFrameReg); // InterpreterFrame |
| masm.passABIArg(numStackValues); |
| masm.callWithABI(JS_FUNC_TO_DATA_PTR(void*, jit::InitBaselineFrameForOsr)); |
| |
| regs.add(OsrFrameReg); |
| Register jitcode = regs.takeAny(); |
| masm.loadPtr(Address(StackPointer, 0), jitcode); |
| masm.loadPtr(Address(StackPointer, sizeof(uintptr_t)), framePtr); |
| masm.freeStack(2 * sizeof(uintptr_t)); |
| |
| Label error; |
| masm.freeStack(ExitFrameLayout::SizeWithFooter()); |
| masm.addPtr(Imm32(BaselineFrame::Size()), framePtr); |
| masm.branchIfFalseBool(ReturnReg, &error); |
| |
| // If OSR-ing, then emit instrumentation for setting lastProfilerFrame |
| // if profiler instrumentation is enabled. |
| { |
| Label skipProfilingInstrumentation; |
| Register realFramePtr = numStackValues; |
| AbsoluteAddress addressOfEnabled(cx->runtime()->spsProfiler.addressOfEnabled()); |
| masm.branch32(Assembler::Equal, addressOfEnabled, Imm32(0), |
| &skipProfilingInstrumentation); |
| masm.ma_daddu(realFramePtr, framePtr, Imm32(sizeof(void*))); |
| masm.profilerEnterFrame(realFramePtr, scratch); |
| masm.bind(&skipProfilingInstrumentation); |
| } |
| |
| masm.jump(jitcode); |
| |
| // OOM: load error value, discard return address and previous frame |
| // pointer and return. |
| masm.bind(&error); |
| masm.movePtr(framePtr, StackPointer); |
| masm.addPtr(Imm32(2 * sizeof(uintptr_t)), StackPointer); |
| masm.moveValue(MagicValue(JS_ION_ERROR), JSReturnOperand); |
| masm.ma_li(scratch, oomReturnLabel.patchAt()); |
| masm.jump(scratch); |
| |
| masm.bind(¬Osr); |
| // Load the scope chain in R1. |
| MOZ_ASSERT(R1.scratchReg() != reg_code); |
| masm.ma_move(R1.scratchReg(), reg_chain); |
| } |
| |
| // The call will push the return address on the stack, thus we check that |
| // the stack would be aligned once the call is complete. |
| masm.assertStackAlignment(JitStackAlignment, sizeof(uintptr_t)); |
| |
| // Call the function with pushing return address to stack. |
| masm.callJitNoProfiler(reg_code); |
| |
| if (type == EnterJitBaseline) { |
| // Baseline OSR will return here. |
| masm.bind(returnLabel.target()); |
| masm.addCodeLabel(returnLabel); |
| masm.bind(oomReturnLabel.target()); |
| masm.addCodeLabel(oomReturnLabel); |
| } |
| |
| // Pop arguments off the stack. |
| // s0 <- 8*argc (size of all arguments we pushed on the stack) |
| masm.pop(s0); |
| masm.rshiftPtr(Imm32(FRAMESIZE_SHIFT), s0); |
| masm.addPtr(s0, StackPointer); |
| |
| // Store the returned value into the vp |
| masm.as_ld(reg_vp, StackPointer, offsetof(EnterJITRegs, a7)); |
| masm.storeValue(JSReturnOperand, Address(reg_vp, 0)); |
| |
| // Restore non-volatile registers and return. |
| GenerateReturn(masm, ShortJump); |
| |
| Linker linker(masm); |
| AutoFlushICache afc("GenerateEnterJIT"); |
| JitCode* code = linker.newCode<NoGC>(cx, OTHER_CODE); |
| |
| #ifdef JS_ION_PERF |
| writePerfSpewerJitCodeProfile(code, "EnterJIT"); |
| #endif |
| |
| return code; |
| } |
| |
| JitCode* |
| JitRuntime::generateInvalidator(JSContext* cx) |
| { |
| MacroAssembler masm(cx); |
| |
| // Stack has to be alligned here. If not, we will have to fix it. |
| masm.checkStackAlignment(); |
| |
| // Push registers such that we can access them from [base + code]. |
| masm.PushRegsInMask(AllRegs); |
| |
| // Pass pointer to InvalidationBailoutStack structure. |
| masm.movePtr(StackPointer, a0); |
| |
| // Reserve place for return value and BailoutInfo pointer |
| masm.subPtr(Imm32(2 * sizeof(uintptr_t)), StackPointer); |
| // Pass pointer to return value. |
| masm.ma_daddu(a1, StackPointer, Imm32(sizeof(uintptr_t))); |
| // Pass pointer to BailoutInfo |
| masm.movePtr(StackPointer, a2); |
| |
| masm.setupAlignedABICall(); |
| masm.passABIArg(a0); |
| masm.passABIArg(a1); |
| masm.passABIArg(a2); |
| masm.callWithABI(JS_FUNC_TO_DATA_PTR(void*, InvalidationBailout)); |
| |
| masm.loadPtr(Address(StackPointer, 0), a2); |
| masm.loadPtr(Address(StackPointer, sizeof(uintptr_t)), a1); |
| // Remove the return address, the IonScript, the register state |
| // (InvaliationBailoutStack) and the space that was allocated for the |
| // return value. |
| masm.addPtr(Imm32(sizeof(InvalidationBailoutStack) + 2 * sizeof(uintptr_t)), StackPointer); |
| // remove the space that this frame was using before the bailout |
| // (computed by InvalidationBailout) |
| masm.addPtr(a1, StackPointer); |
| |
| // Jump to shared bailout tail. The BailoutInfo pointer has to be in r2. |
| JitCode* bailoutTail = cx->runtime()->jitRuntime()->getBailoutTail(); |
| masm.branch(bailoutTail); |
| |
| Linker linker(masm); |
| AutoFlushICache afc("Invalidator"); |
| JitCode* code = linker.newCode<NoGC>(cx, OTHER_CODE); |
| JitSpew(JitSpew_IonInvalidate, " invalidation thunk created at %p", (void*) code->raw()); |
| |
| #ifdef JS_ION_PERF |
| writePerfSpewerJitCodeProfile(code, "Invalidator"); |
| #endif |
| |
| return code; |
| } |
| |
| JitCode* |
| JitRuntime::generateArgumentsRectifier(JSContext* cx, void** returnAddrOut) |
| { |
| // Do not erase the frame pointer in this function. |
| |
| MacroAssembler masm(cx); |
| // Caller: |
| // [arg2] [arg1] [this] [[argc] [callee] [descr] [raddr]] <- sp |
| // '--- s3 ---' |
| |
| // ArgumentsRectifierReg contains the |nargs| pushed onto the current |
| // frame. Including |this|, there are (|nargs| + 1) arguments to copy. |
| MOZ_ASSERT(ArgumentsRectifierReg == s3); |
| |
| // Add |this|, in the counter of known arguments. |
| masm.addPtr(Imm32(1), ArgumentsRectifierReg); |
| |
| Register numActArgsReg = a6; |
| Register calleeTokenReg = a7; |
| Register numArgsReg = a5; |
| |
| // Load |nformals| into numArgsReg. |
| masm.loadPtr(Address(StackPointer, RectifierFrameLayout::offsetOfCalleeToken()), |
| calleeTokenReg); |
| masm.mov(calleeTokenReg, numArgsReg); |
| masm.andPtr(Imm32(uint32_t(CalleeTokenMask)), numArgsReg); |
| masm.load16ZeroExtend(Address(numArgsReg, JSFunction::offsetOfNargs()), numArgsReg); |
| |
| // Stash another copy in t3, since we are going to do destructive operations |
| // on numArgsReg |
| masm.mov(numArgsReg, t3); |
| |
| static_assert(CalleeToken_FunctionConstructing == 1, |
| "Ensure that we can use the constructing bit to count the value"); |
| masm.mov(calleeTokenReg, t2); |
| masm.ma_and(t2, Imm32(uint32_t(CalleeToken_FunctionConstructing))); |
| |
| // Including |this|, and |new.target|, there are (|nformals| + 1 + isConstructing) |
| // arguments to push to the stack. Then we push a JitFrameLayout. We |
| // compute the padding expressed in the number of extra |undefined| values |
| // to push on the stack. |
| static_assert(sizeof(JitFrameLayout) % JitStackAlignment == 0, |
| "No need to consider the JitFrameLayout for aligning the stack"); |
| static_assert(JitStackAlignment % sizeof(Value) == 0, |
| "Ensure that we can pad the stack by pushing extra UndefinedValue"); |
| |
| MOZ_ASSERT(IsPowerOfTwo(JitStackValueAlignment)); |
| masm.add32(Imm32(JitStackValueAlignment - 1 /* for padding */ + 1 /* for |this| */), numArgsReg); |
| masm.add32(t2, numArgsReg); |
| masm.and32(Imm32(~(JitStackValueAlignment - 1)), numArgsReg); |
| |
| // Load the number of |undefined|s to push into t1. |
| masm.as_dsubu(t1, numArgsReg, s3); |
| |
| // Caller: |
| // [arg2] [arg1] [this] [[argc] [callee] [descr] [raddr]] <- sp <- t2 |
| // '------ s3 -------' |
| // |
| // Rectifier frame: |
| // [undef] [undef] [undef] [arg2] [arg1] [this] [[argc] [callee] [descr] [raddr]] |
| // '-------- t1 ---------' '------- s3 -------' |
| |
| // Copy number of actual arguments into numActArgsReg |
| masm.loadPtr(Address(StackPointer, RectifierFrameLayout::offsetOfNumActualArgs()), |
| numActArgsReg); |
| |
| |
| masm.moveValue(UndefinedValue(), ValueOperand(t0)); |
| |
| masm.movePtr(StackPointer, t2); // Save %sp. |
| |
| // Push undefined. (including the padding) |
| { |
| Label undefLoopTop; |
| |
| masm.bind(&undefLoopTop); |
| masm.sub32(Imm32(1), t1); |
| masm.subPtr(Imm32(sizeof(Value)), StackPointer); |
| masm.storeValue(ValueOperand(t0), Address(StackPointer, 0)); |
| |
| masm.ma_b(t1, t1, &undefLoopTop, Assembler::NonZero, ShortJump); |
| } |
| |
| // Get the topmost argument. |
| static_assert(sizeof(Value) == 8, "TimesEight is used to skip arguments"); |
| |
| // | - sizeof(Value)| is used to put rcx such that we can read the last |
| // argument, and not the value which is after. |
| masm.ma_dsll(t0, s3, Imm32(3)); // t0 <- nargs * 8 |
| masm.as_daddu(t1, t2, t0); // t1 <- t2(saved sp) + nargs * 8 |
| masm.addPtr(Imm32(sizeof(RectifierFrameLayout) - sizeof(Value)), t1); |
| |
| // Copy & Push arguments, |nargs| + 1 times (to include |this|). |
| { |
| Label copyLoopTop; |
| |
| masm.bind(©LoopTop); |
| masm.sub32(Imm32(1), s3); |
| masm.subPtr(Imm32(sizeof(Value)), StackPointer); |
| masm.loadValue(Address(t1, 0), ValueOperand(t0)); |
| masm.storeValue(ValueOperand(t0), Address(StackPointer, 0)); |
| masm.subPtr(Imm32(sizeof(Value)), t1); |
| |
| masm.ma_b(s3, s3, ©LoopTop, Assembler::NonZero, ShortJump); |
| } |
| |
| // if constructing, copy newTarget |
| { |
| Label notConstructing; |
| |
| masm.branchTest32(Assembler::Zero, calleeTokenReg, Imm32(CalleeToken_FunctionConstructing), |
| ¬Constructing); |
| |
| // thisFrame[numFormals] = prevFrame[argc] |
| ValueOperand newTarget(t0); |
| |
| // +1 for |this|. We want vp[argc], so don't subtract 1 |
| BaseIndex newTargetSrc(t2, numActArgsReg, TimesEight, sizeof(RectifierFrameLayout) + sizeof(Value)); |
| masm.loadValue(newTargetSrc, newTarget); |
| |
| // Again, 1 for |this| |
| BaseIndex newTargetDest(StackPointer, t3, TimesEight, sizeof(Value)); |
| masm.storeValue(newTarget, newTargetDest); |
| |
| masm.bind(¬Constructing); |
| } |
| |
| // Caller: |
| // [arg2] [arg1] [this] [[argc] [callee] [descr] [raddr]] <- t2 |
| // |
| // |
| // Rectifier frame: |
| // [undef] [undef] [undef] [arg2] [arg1] [this] <- sp [[argc] [callee] [descr] [raddr]] |
| |
| // Construct sizeDescriptor. |
| masm.subPtr(StackPointer, t2); |
| masm.makeFrameDescriptor(t2, JitFrame_Rectifier); |
| |
| // Construct JitFrameLayout. |
| masm.subPtr(Imm32(3 * sizeof(uintptr_t)), StackPointer); |
| // Push actual arguments. |
| masm.storePtr(numActArgsReg, Address(StackPointer, 2 * sizeof(uintptr_t))); |
| // Push callee token. |
| masm.storePtr(calleeTokenReg, Address(StackPointer, sizeof(uintptr_t))); |
| // Push frame descriptor. |
| masm.storePtr(t2, Address(StackPointer, 0)); |
| |
| // Call the target function. |
| // Note that this code assumes the function is JITted. |
| masm.andPtr(Imm32(uint32_t(CalleeTokenMask)), calleeTokenReg); |
| masm.loadPtr(Address(calleeTokenReg, JSFunction::offsetOfNativeOrScript()), t1); |
| masm.loadBaselineOrIonRaw(t1, t1, nullptr); |
| uint32_t returnOffset = masm.callJitNoProfiler(t1); |
| |
| // Remove the rectifier frame. |
| // t2 <- descriptor with FrameType. |
| masm.loadPtr(Address(StackPointer, 0), t2); |
| masm.rshiftPtr(Imm32(FRAMESIZE_SHIFT), t2); // t2 <- descriptor. |
| |
| // Discard descriptor, calleeToken and number of actual arguments. |
| masm.addPtr(Imm32(3 * sizeof(uintptr_t)), StackPointer); |
| |
| // Discard pushed arguments. |
| masm.addPtr(t2, StackPointer); |
| |
| masm.ret(); |
| Linker linker(masm); |
| AutoFlushICache afc("ArgumentsRectifier"); |
| JitCode* code = linker.newCode<NoGC>(cx, OTHER_CODE); |
| |
| if (returnAddrOut) |
| *returnAddrOut = (void*) (code->raw() + returnOffset); |
| |
| #ifdef JS_ION_PERF |
| writePerfSpewerJitCodeProfile(code, "ArgumentsRectifier"); |
| #endif |
| |
| return code; |
| } |
| |
| /* - When bailout is done via out of line code (lazy bailout). |
| * Frame size is stored in $ra (look at |
| * CodeGeneratorMIPS64::generateOutOfLineCode()) and thunk code should save it |
| * on stack. Other difference is that members snapshotOffset_ and padding_ are |
| * pushed to the stack by CodeGeneratorMIPS64::visitOutOfLineBailout(). Field |
| * frameClassId_ is forced to be NO_FRAME_SIZE_CLASS_ID |
| * (See: JitRuntime::generateBailoutHandler). |
| */ |
| static void |
| PushBailoutFrame(MacroAssembler& masm, Register spArg) |
| { |
| // Push the frameSize_ stored in ra |
| // See: CodeGeneratorMIPS64::generateOutOfLineCode() |
| masm.push(ra); |
| |
| // Push registers such that we can access them from [base + code]. |
| masm.PushRegsInMask(AllRegs); |
| |
| // Put pointer to BailoutStack as first argument to the Bailout() |
| masm.movePtr(StackPointer, spArg); |
| } |
| |
| static void |
| GenerateBailoutThunk(JSContext* cx, MacroAssembler& masm, uint32_t frameClass) |
| { |
| PushBailoutFrame(masm, a0); |
| |
| // Put pointer to BailoutInfo |
| static const uint32_t sizeOfBailoutInfo = sizeof(uintptr_t) * 2; |
| masm.subPtr(Imm32(sizeOfBailoutInfo), StackPointer); |
| masm.movePtr(StackPointer, a1); |
| |
| masm.setupAlignedABICall(); |
| masm.passABIArg(a0); |
| masm.passABIArg(a1); |
| masm.callWithABI(JS_FUNC_TO_DATA_PTR(void*, Bailout)); |
| |
| // Get BailoutInfo pointer |
| masm.loadPtr(Address(StackPointer, 0), a2); |
| |
| // Stack is: |
| // [frame] |
| // snapshotOffset |
| // frameSize |
| // [bailoutFrame] |
| // [bailoutInfo] |
| // |
| // Remove both the bailout frame and the topmost Ion frame's stack. |
| // Load frameSize from stack |
| masm.loadPtr(Address(StackPointer, |
| sizeOfBailoutInfo + BailoutStack::offsetOfFrameSize()), a1); |
| // Remove complete BailoutStack class and data after it |
| masm.addPtr(Imm32(sizeof(BailoutStack) + sizeOfBailoutInfo), StackPointer); |
| // Remove frame size srom stack |
| masm.addPtr(a1, StackPointer); |
| |
| // Jump to shared bailout tail. The BailoutInfo pointer has to be in a2. |
| JitCode* bailoutTail = cx->runtime()->jitRuntime()->getBailoutTail(); |
| masm.branch(bailoutTail); |
| } |
| |
| JitCode* |
| JitRuntime::generateBailoutTable(JSContext* cx, uint32_t frameClass) |
| { |
| MOZ_CRASH("MIPS64 does not use bailout tables"); |
| } |
| |
| JitCode* |
| JitRuntime::generateBailoutHandler(JSContext* cx) |
| { |
| MacroAssembler masm(cx); |
| GenerateBailoutThunk(cx, masm, NO_FRAME_SIZE_CLASS_ID); |
| |
| Linker linker(masm); |
| AutoFlushICache afc("BailoutHandler"); |
| JitCode* code = linker.newCode<NoGC>(cx, OTHER_CODE); |
| |
| #ifdef JS_ION_PERF |
| writePerfSpewerJitCodeProfile(code, "BailoutHandler"); |
| #endif |
| |
| return code; |
| } |
| |
| JitCode* |
| JitRuntime::generateVMWrapper(JSContext* cx, const VMFunction& f) |
| { |
| MOZ_ASSERT(functionWrappers_); |
| MOZ_ASSERT(functionWrappers_->initialized()); |
| VMWrapperMap::AddPtr p = functionWrappers_->lookupForAdd(&f); |
| if (p) |
| return p->value(); |
| |
| MacroAssembler masm(cx); |
| |
| AllocatableGeneralRegisterSet regs(Register::Codes::WrapperMask); |
| |
| static_assert((Register::Codes::VolatileMask & ~Register::Codes::WrapperMask) == 0, |
| "Wrapper register set should be a superset of Volatile register set."); |
| |
| // The context is the first argument; a0 is the first argument register. |
| Register cxreg = a0; |
| regs.take(cxreg); |
| |
| // We're aligned to an exit frame, so link it up. |
| masm.enterExitFrame(&f); |
| masm.loadJSContext(cxreg); |
| |
| // Save the base of the argument set stored on the stack. |
| Register argsBase = InvalidReg; |
| if (f.explicitArgs) { |
| argsBase = t1; // Use temporary register. |
| regs.take(argsBase); |
| masm.ma_daddu(argsBase, StackPointer, Imm32(ExitFrameLayout::SizeWithFooter())); |
| } |
| |
| // Reserve space for the outparameter. |
| Register outReg = InvalidReg; |
| switch (f.outParam) { |
| case Type_Value: |
| outReg = regs.takeAny(); |
| masm.reserveStack(sizeof(Value)); |
| masm.movePtr(StackPointer, outReg); |
| break; |
| |
| case Type_Handle: |
| outReg = regs.takeAny(); |
| masm.PushEmptyRooted(f.outParamRootType); |
| masm.movePtr(StackPointer, outReg); |
| break; |
| |
| case Type_Bool: |
| case Type_Int32: |
| outReg = regs.takeAny(); |
| // Reserve 4-byte space to make stack aligned to 8-byte. |
| masm.reserveStack(2 * sizeof(int32_t)); |
| masm.movePtr(StackPointer, outReg); |
| break; |
| |
| case Type_Pointer: |
| outReg = regs.takeAny(); |
| masm.reserveStack(sizeof(uintptr_t)); |
| masm.movePtr(StackPointer, outReg); |
| break; |
| |
| case Type_Double: |
| outReg = regs.takeAny(); |
| masm.reserveStack(sizeof(double)); |
| masm.movePtr(StackPointer, outReg); |
| break; |
| |
| default: |
| MOZ_ASSERT(f.outParam == Type_Void); |
| break; |
| } |
| |
| masm.setupUnalignedABICall(regs.getAny()); |
| masm.passABIArg(cxreg); |
| |
| size_t argDisp = 0; |
| |
| // Copy any arguments. |
| for (uint32_t explicitArg = 0; explicitArg < f.explicitArgs; explicitArg++) { |
| MoveOperand from; |
| switch (f.argProperties(explicitArg)) { |
| case VMFunction::WordByValue: |
| if (f.argPassedInFloatReg(explicitArg)) |
| masm.passABIArg(MoveOperand(argsBase, argDisp), MoveOp::DOUBLE); |
| else |
| masm.passABIArg(MoveOperand(argsBase, argDisp), MoveOp::GENERAL); |
| argDisp += sizeof(void*); |
| break; |
| case VMFunction::WordByRef: |
| masm.passABIArg(MoveOperand(argsBase, argDisp, MoveOperand::EFFECTIVE_ADDRESS), |
| MoveOp::GENERAL); |
| argDisp += sizeof(void*); |
| break; |
| case VMFunction::DoubleByValue: |
| case VMFunction::DoubleByRef: |
| MOZ_CRASH("NYI: MIPS64 callVM should not be used with 128bits values."); |
| break; |
| } |
| } |
| |
| // Copy the implicit outparam, if any. |
| if (InvalidReg != outReg) |
| masm.passABIArg(outReg); |
| |
| masm.callWithABI(f.wrapped); |
| |
| // Test for failure. |
| switch (f.failType()) { |
| case Type_Object: |
| masm.branchTestPtr(Assembler::Zero, v0, v0, masm.failureLabel()); |
| break; |
| case Type_Bool: |
| // Called functions return bools, which are 0/false and non-zero/true |
| masm.branchIfFalseBool(v0, masm.failureLabel()); |
| break; |
| default: |
| MOZ_CRASH("unknown failure kind"); |
| } |
| |
| // Load the outparam and free any allocated stack. |
| switch (f.outParam) { |
| case Type_Handle: |
| masm.popRooted(f.outParamRootType, ReturnReg, JSReturnOperand); |
| break; |
| |
| case Type_Value: |
| masm.loadValue(Address(StackPointer, 0), JSReturnOperand); |
| masm.freeStack(sizeof(Value)); |
| break; |
| |
| case Type_Int32: |
| masm.load32(Address(StackPointer, 0), ReturnReg); |
| masm.freeStack(2 * sizeof(int32_t)); |
| break; |
| |
| case Type_Pointer: |
| masm.loadPtr(Address(StackPointer, 0), ReturnReg); |
| masm.freeStack(sizeof(uintptr_t)); |
| break; |
| |
| case Type_Bool: |
| masm.load8ZeroExtend(Address(StackPointer, 0), ReturnReg); |
| masm.freeStack(2 * sizeof(int32_t)); |
| break; |
| |
| case Type_Double: |
| if (cx->runtime()->jitSupportsFloatingPoint) { |
| masm.as_ld(ReturnDoubleReg, StackPointer, 0); |
| } else { |
| masm.assumeUnreachable("Unable to load into float reg, with no FP support."); |
| } |
| masm.freeStack(sizeof(double)); |
| break; |
| |
| default: |
| MOZ_ASSERT(f.outParam == Type_Void); |
| break; |
| } |
| |
| masm.leaveExitFrame(); |
| masm.retn(Imm32(sizeof(ExitFrameLayout) + |
| f.explicitStackSlots() * sizeof(void*) + |
| f.extraValuesToPop * sizeof(Value))); |
| |
| Linker linker(masm); |
| AutoFlushICache afc("VMWrapper"); |
| JitCode* wrapper = linker.newCode<NoGC>(cx, OTHER_CODE); |
| if (!wrapper) |
| return nullptr; |
| |
| // linker.newCode may trigger a GC and sweep functionWrappers_ so we have |
| // to use relookupOrAdd instead of add. |
| if (!functionWrappers_->relookupOrAdd(p, &f, wrapper)) |
| return nullptr; |
| |
| #ifdef JS_ION_PERF |
| writePerfSpewerJitCodeProfile(wrapper, "VMWrapper"); |
| #endif |
| |
| return wrapper; |
| } |
| |
| JitCode* |
| JitRuntime::generatePreBarrier(JSContext* cx, MIRType type) |
| { |
| MacroAssembler masm(cx); |
| |
| LiveRegisterSet save; |
| if (cx->runtime()->jitSupportsFloatingPoint) { |
| save.set() = RegisterSet(GeneralRegisterSet(Registers::VolatileMask), |
| FloatRegisterSet(FloatRegisters::VolatileMask)); |
| } else { |
| save.set() = RegisterSet(GeneralRegisterSet(Registers::VolatileMask), |
| FloatRegisterSet()); |
| } |
| masm.PushRegsInMask(save); |
| |
| MOZ_ASSERT(PreBarrierReg == a1); |
| masm.movePtr(ImmPtr(cx->runtime()), a0); |
| |
| masm.setupUnalignedABICall(a2); |
| masm.passABIArg(a0); |
| masm.passABIArg(a1); |
| masm.callWithABI(IonMarkFunction(type)); |
| |
| masm.PopRegsInMask(save); |
| masm.ret(); |
| |
| Linker linker(masm); |
| AutoFlushICache afc("PreBarrier"); |
| JitCode* code = linker.newCode<NoGC>(cx, OTHER_CODE); |
| |
| #ifdef JS_ION_PERF |
| writePerfSpewerJitCodeProfile(code, "PreBarrier"); |
| #endif |
| |
| return code; |
| } |
| |
| typedef bool (*HandleDebugTrapFn)(JSContext*, BaselineFrame*, uint8_t*, bool*); |
| static const VMFunction HandleDebugTrapInfo = FunctionInfo<HandleDebugTrapFn>(HandleDebugTrap); |
| |
| JitCode* |
| JitRuntime::generateDebugTrapHandler(JSContext* cx) |
| { |
| MacroAssembler masm(cx); |
| |
| Register scratch1 = t0; |
| Register scratch2 = t1; |
| |
| // Load BaselineFrame pointer in scratch1. |
| masm.movePtr(s5, scratch1); |
| masm.subPtr(Imm32(BaselineFrame::Size()), scratch1); |
| |
| // Enter a stub frame and call the HandleDebugTrap VM function. Ensure |
| // the stub frame has a nullptr ICStub pointer, since this pointer is |
| // marked during GC. |
| masm.movePtr(ImmPtr(nullptr), ICStubReg); |
| EmitBaselineEnterStubFrame(masm, scratch2); |
| |
| JitCode* code = cx->runtime()->jitRuntime()->getVMWrapper(HandleDebugTrapInfo); |
| if (!code) |
| return nullptr; |
| |
| masm.subPtr(Imm32(2 * sizeof(uintptr_t)), StackPointer); |
| masm.storePtr(ra, Address(StackPointer, sizeof(uintptr_t))); |
| masm.storePtr(scratch1, Address(StackPointer, 0)); |
| |
| EmitBaselineCallVM(code, masm); |
| |
| EmitBaselineLeaveStubFrame(masm); |
| |
| // If the stub returns |true|, we have to perform a forced return |
| // (return from the JS frame). If the stub returns |false|, just return |
| // from the trap stub so that execution continues at the current pc. |
| Label forcedReturn; |
| masm.branchTest32(Assembler::NonZero, ReturnReg, ReturnReg, &forcedReturn); |
| |
| // ra was restored by EmitLeaveStubFrame |
| masm.branch(ra); |
| |
| masm.bind(&forcedReturn); |
| masm.loadValue(Address(s5, BaselineFrame::reverseOffsetOfReturnValue()), |
| JSReturnOperand); |
| masm.movePtr(s5, StackPointer); |
| masm.pop(s5); |
| |
| // Before returning, if profiling is turned on, make sure that lastProfilingFrame |
| // is set to the correct caller frame. |
| { |
| Label skipProfilingInstrumentation; |
| AbsoluteAddress addressOfEnabled(cx->runtime()->spsProfiler.addressOfEnabled()); |
| masm.branch32(Assembler::Equal, addressOfEnabled, Imm32(0), &skipProfilingInstrumentation); |
| masm.profilerExitFrame(); |
| masm.bind(&skipProfilingInstrumentation); |
| } |
| |
| masm.ret(); |
| |
| Linker linker(masm); |
| AutoFlushICache afc("DebugTrapHandler"); |
| JitCode* codeDbg = linker.newCode<NoGC>(cx, OTHER_CODE); |
| |
| #ifdef JS_ION_PERF |
| writePerfSpewerJitCodeProfile(codeDbg, "DebugTrapHandler"); |
| #endif |
| |
| return codeDbg; |
| } |
| |
| |
| JitCode* |
| JitRuntime::generateExceptionTailStub(JSContext* cx, void* handler) |
| { |
| MacroAssembler masm; |
| |
| masm.handleFailureWithHandlerTail(handler); |
| |
| Linker linker(masm); |
| AutoFlushICache afc("ExceptionTailStub"); |
| JitCode* code = linker.newCode<NoGC>(cx, OTHER_CODE); |
| |
| #ifdef JS_ION_PERF |
| writePerfSpewerJitCodeProfile(code, "ExceptionTailStub"); |
| #endif |
| |
| return code; |
| } |
| |
| JitCode* |
| JitRuntime::generateBailoutTailStub(JSContext* cx) |
| { |
| MacroAssembler masm; |
| |
| masm.generateBailoutTail(a1, a2); |
| |
| Linker linker(masm); |
| AutoFlushICache afc("BailoutTailStub"); |
| JitCode* code = linker.newCode<NoGC>(cx, OTHER_CODE); |
| |
| #ifdef JS_ION_PERF |
| writePerfSpewerJitCodeProfile(code, "BailoutTailStub"); |
| #endif |
| |
| return code; |
| } |
| |
| JitCode* |
| JitRuntime::generateProfilerExitFrameTailStub(JSContext* cx) |
| { |
| MacroAssembler masm; |
| |
| Register scratch1 = t0; |
| Register scratch2 = t1; |
| Register scratch3 = t2; |
| Register scratch4 = t3; |
| |
| // |
| // The code generated below expects that the current stack pointer points |
| // to an Ion or Baseline frame, at the state it would be immediately |
| // before a ret(). Thus, after this stub's business is done, it executes |
| // a ret() and returns directly to the caller script, on behalf of the |
| // callee script that jumped to this code. |
| // |
| // Thus the expected stack is: |
| // |
| // StackPointer ----+ |
| // v |
| // ..., ActualArgc, CalleeToken, Descriptor, ReturnAddr |
| // MEM-HI MEM-LOW |
| // |
| // |
| // The generated jitcode is responsible for overwriting the |
| // jitActivation->lastProfilingFrame field with a pointer to the previous |
| // Ion or Baseline jit-frame that was pushed before this one. It is also |
| // responsible for overwriting jitActivation->lastProfilingCallSite with |
| // the return address into that frame. The frame could either be an |
| // immediate "caller" frame, or it could be a frame in a previous |
| // JitActivation (if the current frame was entered from C++, and the C++ |
| // was entered by some caller jit-frame further down the stack). |
| // |
| // So this jitcode is responsible for "walking up" the jit stack, finding |
| // the previous Ion or Baseline JS frame, and storing its address and the |
| // return address into the appropriate fields on the current jitActivation. |
| // |
| // There are a fixed number of different path types that can lead to the |
| // current frame, which is either a baseline or ion frame: |
| // |
| // <Baseline-Or-Ion> |
| // ^ |
| // | |
| // ^--- Ion |
| // | |
| // ^--- Baseline Stub <---- Baseline |
| // | |
| // ^--- Argument Rectifier |
| // | ^ |
| // | | |
| // | ^--- Ion |
| // | | |
| // | ^--- Baseline Stub <---- Baseline |
| // | |
| // ^--- Entry Frame (From C++) |
| // |
| Register actReg = scratch4; |
| AbsoluteAddress activationAddr(GetJitContext()->runtime->addressOfProfilingActivation()); |
| masm.loadPtr(activationAddr, actReg); |
| |
| Address lastProfilingFrame(actReg, JitActivation::offsetOfLastProfilingFrame()); |
| Address lastProfilingCallSite(actReg, JitActivation::offsetOfLastProfilingCallSite()); |
| |
| #ifdef DEBUG |
| // Ensure that frame we are exiting is current lastProfilingFrame |
| { |
| masm.loadPtr(lastProfilingFrame, scratch1); |
| Label checkOk; |
| masm.branchPtr(Assembler::Equal, scratch1, ImmWord(0), &checkOk); |
| masm.branchPtr(Assembler::Equal, StackPointer, scratch1, &checkOk); |
| masm.assumeUnreachable( |
| "Mismatch between stored lastProfilingFrame and current stack pointer."); |
| masm.bind(&checkOk); |
| } |
| #endif |
| |
| // Load the frame descriptor into |scratch1|, figure out what to do depending on its type. |
| masm.loadPtr(Address(StackPointer, JitFrameLayout::offsetOfDescriptor()), scratch1); |
| |
| // Going into the conditionals, we will have: |
| // FrameDescriptor.size in scratch1 |
| // FrameDescriptor.type in scratch2 |
| masm.ma_and(scratch2, scratch1, Imm32((1 << FRAMETYPE_BITS) - 1)); |
| masm.rshiftPtr(Imm32(FRAMESIZE_SHIFT), scratch1); |
| |
| // Handling of each case is dependent on FrameDescriptor.type |
| Label handle_IonJS; |
| Label handle_BaselineStub; |
| Label handle_Rectifier; |
| Label handle_IonAccessorIC; |
| Label handle_Entry; |
| Label end; |
| |
| masm.branch32(Assembler::Equal, scratch2, Imm32(JitFrame_IonJS), &handle_IonJS); |
| masm.branch32(Assembler::Equal, scratch2, Imm32(JitFrame_BaselineJS), &handle_IonJS); |
| masm.branch32(Assembler::Equal, scratch2, Imm32(JitFrame_BaselineStub), &handle_BaselineStub); |
| masm.branch32(Assembler::Equal, scratch2, Imm32(JitFrame_Rectifier), &handle_Rectifier); |
| masm.branch32(Assembler::Equal, scratch2, Imm32(JitFrame_IonAccessorIC), &handle_IonAccessorIC); |
| masm.branch32(Assembler::Equal, scratch2, Imm32(JitFrame_Entry), &handle_Entry); |
| |
| masm.assumeUnreachable("Invalid caller frame type when exiting from Ion frame."); |
| |
| // |
| // JitFrame_IonJS |
| // |
| // Stack layout: |
| // ... |
| // Ion-Descriptor |
| // Prev-FP ---> Ion-ReturnAddr |
| // ... previous frame data ... |- Descriptor.Size |
| // ... arguments ... | |
| // ActualArgc | |
| // CalleeToken |- JitFrameLayout::Size() |
| // Descriptor | |
| // FP -----> ReturnAddr | |
| // |
| masm.bind(&handle_IonJS); |
| { |
| // |scratch1| contains Descriptor.size |
| |
| // returning directly to an IonJS frame. Store return addr to frame |
| // in lastProfilingCallSite. |
| masm.loadPtr(Address(StackPointer, JitFrameLayout::offsetOfReturnAddress()), scratch2); |
| masm.storePtr(scratch2, lastProfilingCallSite); |
| |
| // Store return frame in lastProfilingFrame. |
| // scratch2 := StackPointer + Descriptor.size*1 + JitFrameLayout::Size(); |
| masm.as_daddu(scratch2, StackPointer, scratch1); |
| masm.ma_daddu(scratch2, scratch2, Imm32(JitFrameLayout::Size())); |
| masm.storePtr(scratch2, lastProfilingFrame); |
| masm.ret(); |
| } |
| |
| // |
| // JitFrame_BaselineStub |
| // |
| // Look past the stub and store the frame pointer to |
| // the baselineJS frame prior to it. |
| // |
| // Stack layout: |
| // ... |
| // BL-Descriptor |
| // Prev-FP ---> BL-ReturnAddr |
| // +-----> BL-PrevFramePointer |
| // | ... BL-FrameData ... |
| // | BLStub-Descriptor |
| // | BLStub-ReturnAddr |
| // | BLStub-StubPointer | |
| // +------ BLStub-SavedFramePointer |- Descriptor.Size |
| // ... arguments ... | |
| // ActualArgc | |
| // CalleeToken |- JitFrameLayout::Size() |
| // Descriptor | |
| // FP -----> ReturnAddr | |
| // |
| // We take advantage of the fact that the stub frame saves the frame |
| // pointer pointing to the baseline frame, so a bunch of calculation can |
| // be avoided. |
| // |
| masm.bind(&handle_BaselineStub); |
| { |
| masm.as_daddu(scratch3, StackPointer, scratch1); |
| Address stubFrameReturnAddr(scratch3, |
| JitFrameLayout::Size() + |
| BaselineStubFrameLayout::offsetOfReturnAddress()); |
| masm.loadPtr(stubFrameReturnAddr, scratch2); |
| masm.storePtr(scratch2, lastProfilingCallSite); |
| |
| Address stubFrameSavedFramePtr(scratch3, |
| JitFrameLayout::Size() - (2 * sizeof(void*))); |
| masm.loadPtr(stubFrameSavedFramePtr, scratch2); |
| masm.addPtr(Imm32(sizeof(void*)), scratch2); // Skip past BL-PrevFramePtr |
| masm.storePtr(scratch2, lastProfilingFrame); |
| masm.ret(); |
| } |
| |
| |
| // |
| // JitFrame_Rectifier |
| // |
| // The rectifier frame can be preceded by either an IonJS or a |
| // BaselineStub frame. |
| // |
| // Stack layout if caller of rectifier was Ion: |
| // |
| // Ion-Descriptor |
| // Ion-ReturnAddr |
| // ... ion frame data ... |- Rect-Descriptor.Size |
| // < COMMON LAYOUT > |
| // |
| // Stack layout if caller of rectifier was Baseline: |
| // |
| // BL-Descriptor |
| // Prev-FP ---> BL-ReturnAddr |
| // +-----> BL-SavedFramePointer |
| // | ... baseline frame data ... |
| // | BLStub-Descriptor |
| // | BLStub-ReturnAddr |
| // | BLStub-StubPointer | |
| // +------ BLStub-SavedFramePointer |- Rect-Descriptor.Size |
| // ... args to rectifier ... | |
| // < COMMON LAYOUT > |
| // |
| // Common stack layout: |
| // |
| // ActualArgc | |
| // CalleeToken |- IonRectitiferFrameLayout::Size() |
| // Rect-Descriptor | |
| // Rect-ReturnAddr | |
| // ... rectifier data & args ... |- Descriptor.Size |
| // ActualArgc | |
| // CalleeToken |- JitFrameLayout::Size() |
| // Descriptor | |
| // FP -----> ReturnAddr | |
| // |
| masm.bind(&handle_Rectifier); |
| { |
| // scratch2 := StackPointer + Descriptor.size*1 + JitFrameLayout::Size(); |
| masm.as_daddu(scratch2, StackPointer, scratch1); |
| masm.addPtr(Imm32(JitFrameLayout::Size()), scratch2); |
| masm.loadPtr(Address(scratch2, RectifierFrameLayout::offsetOfDescriptor()), scratch3); |
| masm.ma_dsrl(scratch1, scratch3, Imm32(FRAMESIZE_SHIFT)); |
| masm.and32(Imm32((1 << FRAMETYPE_BITS) - 1), scratch3); |
| |
| // Now |scratch1| contains Rect-Descriptor.Size |
| // and |scratch2| points to Rectifier frame |
| // and |scratch3| contains Rect-Descriptor.Type |
| |
| // Check for either Ion or BaselineStub frame. |
| Label handle_Rectifier_BaselineStub; |
| masm.branch32(Assembler::NotEqual, scratch3, Imm32(JitFrame_IonJS), |
| &handle_Rectifier_BaselineStub); |
| |
| // Handle Rectifier <- IonJS |
| // scratch3 := RectFrame[ReturnAddr] |
| masm.loadPtr(Address(scratch2, RectifierFrameLayout::offsetOfReturnAddress()), scratch3); |
| masm.storePtr(scratch3, lastProfilingCallSite); |
| |
| // scratch3 := RectFrame + Rect-Descriptor.Size + RectifierFrameLayout::Size() |
| masm.as_daddu(scratch3, scratch2, scratch1); |
| masm.addPtr(Imm32(RectifierFrameLayout::Size()), scratch3); |
| masm.storePtr(scratch3, lastProfilingFrame); |
| masm.ret(); |
| |
| // Handle Rectifier <- BaselineStub <- BaselineJS |
| masm.bind(&handle_Rectifier_BaselineStub); |
| #ifdef DEBUG |
| { |
| Label checkOk; |
| masm.branch32(Assembler::Equal, scratch3, Imm32(JitFrame_BaselineStub), &checkOk); |
| masm.assumeUnreachable("Unrecognized frame preceding baselineStub."); |
| masm.bind(&checkOk); |
| } |
| #endif |
| masm.as_daddu(scratch3, scratch2, scratch1); |
| Address stubFrameReturnAddr(scratch3, RectifierFrameLayout::Size() + |
| BaselineStubFrameLayout::offsetOfReturnAddress()); |
| masm.loadPtr(stubFrameReturnAddr, scratch2); |
| masm.storePtr(scratch2, lastProfilingCallSite); |
| |
| Address stubFrameSavedFramePtr(scratch3, |
| RectifierFrameLayout::Size() - (2 * sizeof(void*))); |
| masm.loadPtr(stubFrameSavedFramePtr, scratch2); |
| masm.addPtr(Imm32(sizeof(void*)), scratch2); |
| masm.storePtr(scratch2, lastProfilingFrame); |
| masm.ret(); |
| } |
| |
| // JitFrame_IonAccessorIC |
| // |
| // The caller is always an IonJS frame. |
| // |
| // Ion-Descriptor |
| // Ion-ReturnAddr |
| // ... ion frame data ... |- AccFrame-Descriptor.Size |
| // StubCode | |
| // AccFrame-Descriptor |- IonAccessorICFrameLayout::Size() |
| // AccFrame-ReturnAddr | |
| // ... accessor frame data & args ... |- Descriptor.Size |
| // ActualArgc | |
| // CalleeToken |- JitFrameLayout::Size() |
| // Descriptor | |
| // FP -----> ReturnAddr | |
| masm.bind(&handle_IonAccessorIC); |
| { |
| // scratch2 := StackPointer + Descriptor.size + JitFrameLayout::Size() |
| masm.as_daddu(scratch2, StackPointer, scratch1); |
| masm.addPtr(Imm32(JitFrameLayout::Size()), scratch2); |
| |
| // scratch3 := AccFrame-Descriptor.Size |
| masm.loadPtr(Address(scratch2, IonAccessorICFrameLayout::offsetOfDescriptor()), scratch3); |
| #ifdef DEBUG |
| // Assert previous frame is an IonJS frame. |
| masm.movePtr(scratch3, scratch1); |
| masm.and32(Imm32((1 << FRAMETYPE_BITS) - 1), scratch1); |
| { |
| Label checkOk; |
| masm.branch32(Assembler::Equal, scratch1, Imm32(JitFrame_IonJS), &checkOk); |
| masm.assumeUnreachable("IonAccessorIC frame must be preceded by IonJS frame"); |
| masm.bind(&checkOk); |
| } |
| #endif |
| masm.rshiftPtr(Imm32(FRAMESIZE_SHIFT), scratch3); |
| |
| // lastProfilingCallSite := AccFrame-ReturnAddr |
| masm.loadPtr(Address(scratch2, IonAccessorICFrameLayout::offsetOfReturnAddress()), scratch1); |
| masm.storePtr(scratch1, lastProfilingCallSite); |
| |
| // lastProfilingFrame := AccessorFrame + AccFrame-Descriptor.Size + |
| // IonAccessorICFrameLayout::Size() |
| masm.as_daddu(scratch1, scratch2, scratch3); |
| masm.addPtr(Imm32(IonAccessorICFrameLayout::Size()), scratch1); |
| masm.storePtr(scratch1, lastProfilingFrame); |
| masm.ret(); |
| } |
| |
| // |
| // JitFrame_Entry |
| // |
| // If at an entry frame, store null into both fields. |
| // |
| masm.bind(&handle_Entry); |
| { |
| masm.movePtr(ImmPtr(nullptr), scratch1); |
| masm.storePtr(scratch1, lastProfilingCallSite); |
| masm.storePtr(scratch1, lastProfilingFrame); |
| masm.ret(); |
| } |
| |
| Linker linker(masm); |
| AutoFlushICache afc("ProfilerExitFrameTailStub"); |
| JitCode* code = linker.newCode<NoGC>(cx, OTHER_CODE); |
| |
| #ifdef JS_ION_PERF |
| writePerfSpewerJitCodeProfile(code, "ProfilerExitFrameStub"); |
| #endif |
| |
| return code; |
| } |
