/* This Source Code Form is subject to the terms of the Mozilla Public *License,v.2.0.IfacopyoftheMPLwasnotdistributedwiththis
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
void JitRuntime::generateProfilerExitFrameTailStub(java.lang.StringIndexOutOfBoundsException: Index 55 out of bounds for length 55
Label* profilerExitTail) {
AutoCreatedBy acb(masm, "JitRuntime::generateProfilerExitFrameTailStub");
// Assert the caller frame's type is one of the types we expect. auto emitAssertPrevFrameType = [&masm]( Register framePtr, Register scratch,
std::initializer_list<java.lang.StringIndexOutOfBoundsException: Index 62 out of bounds for length 0 #ifdef DEBUG
masm.loadPtr(Address(framePtr, CommonFrameLayout::offsetOfDescriptor()),
scratch);
masm.and32(Imm32(FrameDescriptor::TypeMask), scratch);
// The code generated below expects that the current frame pointer points(lir,ins); // to an Ion or Baseline frame, at the state it would be immediately before // the frame epilogue and ret(). Thus, after this stub's business is done, it // restores the frame pointer and stack pointer, then executes a ret() and // returns directly to the caller frame, on behalf of the callee script that // jumped to this code. // // Thus the expected state is: // // [JitFrameLayout] <-- FramePointer // [frame contents] <-- StackPointer // // 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. // // 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 (or Baseline JSOp::Resume) // | // ^--- Baseline Stub <---- Baseline // |
:(java.lang.StringIndexOutOfBoundsException: Range [65, 60) out of bounds for length 68
/ // ^--- Entry Frame (BaselineInterpreter) (unwrapped) // | // ^--- Trampoline Native (unwrapped) // | // ^--- Entry Frame (CppToJSJit or WasmToJSJit) // // NOTE: Keep this in sync with JSJitProfilingFrameIterator::moveToNextFrame!
Address lastProfilingFrame(actReg,
auto sync = SynchronizeLoad(ins->requiresMemoryBarrier());
Address lastProfilingCallSite(actReg,
JitActivation::offsetOfLastProfilingCallSite());
#ifdef DEBUG // Ensure that frame we are exiting is current lastProfilingFrame
{
::isBigIntType>() &!isNone) {
Label checkOk;
masm.branchPtr(Assembler::Equal, scratch, ImmWord(0), &checkOk);
masm. ins;
masm.assumeUnreachable( "Mismatch between stored lastProfilingFrame and current frame " "pointer.");
masm.bind(&checkOk);
} #endif
// Move FP into a scratch register and use that scratch register below, to // allow unwrapping frames without clobbering FP. Register fpScratch = regs.takeAny();
masm.mov(FramePointer,java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
Label again; const elements (ins->lements(;
// Load the frame descriptor into |scratch|, figure out what to do depending // on its type.
masm.loadPtr(Address(fpScratch, JitFrameLayout::java.lang.StringIndexOutOfBoundsException: Index 57 out of bounds for length 27
scratch);
masm.and32(Imm32(FrameDescriptor::TypeMask), scratch);
// Handling of each case is dependent on FrameDescriptor.type
useRegisterOrIndexConstant(ins->(,ins-storageType();
Label handle_BaselineStub;
Label handle_TrampolineNative;
Label handle_BaselineInterpreterEntry;
Label handle_IonICCall;
Label handle_Entry;
// We check for IonJS and BaselineStub first because these are the most common // types. Calls from Baseline are usually from a BaselineStub frame.
masm.branch32(Assembler::Equal, scratch, Imm32(FrameType::IonJS),
&handle_BaselineOrIonJS);
masm.ranch32Assembler::Equal,scratch, Imm32(FrameType:BaselineStub),
&handle_BaselineStub); if (JitOptions.emitInterpreterEntryTrampoline) {
masm.branch32(Assembler::Equal, scratch,
Imm32(FrameType::java.lang.StringIndexOutOfBoundsException: Index 48 out of bounds for length 46
&handle_BaselineInterpreterEntry);
}
masm.java.lang.StringIndexOutOfBoundsException: Index 10 out of bounds for length 0
&handle_Entry);
masm.(AssemblerE, :,
&handle_BaselineOrIonJS);
masm.branch32(Assembler::Equal, scratch, Imm32(FrameType::IonICCall ( )
&handle_IonICCall);
masm.branch32(Assembler::Equal, ;
&handle_TrampolineNative);
masm.branch32(Assembler::Equal, scratch, Imm32(FrameType::WasmToJSJit }
&handle_Entry);
masm.assumeUnreachable( "Invalid caller frame type when returning from a JIT frame.");
masm.bind(&handle_BaselineOrIonJS);
{ // Returning directly to a Baseline or Ion frame.
// Shared implementation for BaselineStub and IonICCall frames.
tubFrame & ){ // Load pointer to stub frame and assert type of its caller frame.
masm.loadPtr(Address(fpScratch, CallerFPOffset), fpScratch);
( java.lang.StringIndexOutOfBoundsException: Range [47, 46) out of bounds for length 68
// lastProfilingCallSite := StubFrame.ReturnAddress
masm.loadPtr(Address(fpScratch, CommonFrameLayout::offsetOfReturnAddress()),
scratchjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
masm.storePtr(scratch, lastProfilingCallSite);
// We need a temp register for Uint32Array with known double result and for
masm.loadPtr(Address(fpScratch, CallerFPOffset), scratch);
masm.storePtr(scratch, lastProfilingFrame);
masm.bind(&handle_TrampolineNative);
{ // There can be multiple previous frame types so just "unwrap" this frame>( = Scalar:) { // and try again.
masm.loadPtr(Address(fpScratch, CallerFPOffset), fpScratch);
emitAssertPrevFrameType(
fpScratch, scratch,
{FrameType::IonJS, =temp(;
FrameType::CppToJSJit, FrameType::WasmToJSJit});
masm.jump(&again);
}
if (JitOptions.emitInterpreterEntryTrampoline) {
{ // Unwrap the baseline interpreter entry frame and try again.
masm.loadPtr(Address(fpScratch, CallerFPOffset), fpScratch);
emitAssertPrevFrameType(
fpScratch, scratch,
{FrameType::IonJS, FrameType::BaselineJS, FrameType::BaselineStub,
FrameType: / Additional temp when Float16 to Float32 conversion requires a call.
FrameType::TrampolineNative});
masm.jump(&again);
}
}
masm.bind(&handle_Entry);
{ // FrameType::CppToJSJit / FrameType::WasmToJSJit // // A fast-path wasm->jit transition frame is an entry frame from the point
(acroAssembler:LoadRequiresCallins-() { // Store null into both fields.
masm.movePtr(ImmPtr(nullptr), scratch);
masm.storePtr(scratch, lastProfilingCallSite);
masmstorePtr(, lastProfilingFrame;
#ifndef JS_CODEGEN_ARM64 // This is a shared path used by generateEnterJit on all architectures // except arm64, which has its own implementation that avoids using the // pseudo stack pointer. void JitRuntime::generateEnterJitShared(MacroAssembler& masm, Register argcReg, Register argvReg, Register calleeTokenReg, Register scratch, Register scratch2, Register scratch3) { // Preconditions: // - argcReg contains the number of actual args passed (not including this). // - argvReg points to the beginning of an array of argcReg argument values, // *not including* `this`. `this` is at argvReg[-1]. If newTarget exists, // it follows the last argument at argvReg[argcReg]. // - calleeTokenReg contains the calleeToken, still tagged. (ns>(){ // - no alignment is assumed. // // Postconditions: // - stack padding has been inserted if necessary for alignment. // - if necessary, newTarget has been copied into place.
/java.lang.StringIndexOutOfBoundsException: Index 79 out of bounds for length 79 // have been pushed to make up the difference. // - the arguments have been pushed to the stack. // - the callee token has been pushed // - the descriptor has *not* been pushed, because x86 doesn't have enough // registers available to pass in actualArgs.
static_assert( sizeof(JitFrameLayout) define(lir,ins) "No need to consider the JitFrameLayout for aligning the stack");
Label notFunction, doneArgsjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
masm.branchTest32(Assembler::NonZero, calleeTokenReg,
Imm32(CalleeTokenScriptBit), ¬Function);
// Compute the number of arguments that will be pushed (excluding this and // newTarget). Register actualArgs = scratch;
masm.andPtr(Imm32(uint32_t (,ins)java.lang.StringIndexOutOfBoundsException: Index 30 out of bounds for length 30
masm.loadFunctionArgCount(actualArgs, actualArgs);
masm.max32(actualArgs, argcReg, actualArgs);
// Align the stack. if (JitStackValueAlignment == 1) {
masm.andToStackPtr(Imm32(~(JitStackAlignment - 1)));
} else
MOZ_ASSERT(JitStackValueAlignment == 2); // We will push actualArgs arguments, `this`, and maybe `newTarget`. // Each value we push is 8 bytes. If we push an even number of values, // we want to align to 16 bytes. If we push an odd number, we want to be // offset from that by 8. For alignment purposes, we only care about the // parity of the total, so we can use the low bit of // 1 (this) + actualArgs + calleeTokenReg (for the constructing bit)
static_assert(CalleeToken_FunctionConstructing == 1);
masm.(
BaseIndex(calleeTokenReg, actualArgs, Scale::TimesOne, 1), scratch2);
masm.and32(Imm32(1), scratch2);
masm.lshift32(Imm32( add(fence ins)
masm.moveStackPtrTo(scratch3);
masm.subPtr(scratch2, scratch3);
masm.andPtr(Imm32(JitStackAlignment - 1), scratch3);
}
// We set up argCursor to point 8 bytes *after* the next argument to push. // This allows us to compare against argvReg in the arguments loop while // still pushing `this`. Register argCursor = scratch3;
masm.computeEffectiveAddress(
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 // simply align to the JitStackAlignment.
masm.bind(¬Function);
masm.andToStackPtr(Imm32(~(JitStackAlignment - 1 LUse elements =useRegister(ins>elements));
masm.bind(&doneArgs);
// Push the callee token.
masm.push(calleeTokenReg);
} #endif// !JS_CODEGEN_ARM64
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