[chore] remove vendor

1 files changed, 0 insertions, 339 deletions

diff --git a/vendor/github.com/tetratelabs/wazero/internal/wasm/table.go b/vendor/github.com/tetratelabs/wazero/internal/wasm/table.go
deleted file mode 100644
index 2123693c6..000000000
--- a/vendor/github.com/tetratelabs/wazero/internal/wasm/table.go
+++ /dev/null
@@ -1,339 +0,0 @@
-package wasm
-
-import (
-	"fmt"
-	"math"
-	"sync"
-
-	"github.com/tetratelabs/wazero/api"
-	"github.com/tetratelabs/wazero/internal/leb128"
-)
-
-// Table describes the limits of elements and its type in a table.
-type Table struct {
-	Min  uint32
-	Max  *uint32
-	Type RefType
-}
-
-// RefType is either RefTypeFuncref or RefTypeExternref as of WebAssembly core 2.0.
-type RefType = byte
-
-const (
-	// RefTypeFuncref represents a reference to a function.
-	RefTypeFuncref = ValueTypeFuncref
-	// RefTypeExternref represents a reference to a host object, which is not currently supported in wazero.
-	RefTypeExternref = ValueTypeExternref
-)
-
-func RefTypeName(t RefType) (ret string) {
-	switch t {
-	case RefTypeFuncref:
-		ret = "funcref"
-	case RefTypeExternref:
-		ret = "externref"
-	default:
-		ret = fmt.Sprintf("unknown(0x%x)", t)
-	}
-	return
-}
-
-// ElementMode represents a mode of element segment which is either active, passive or declarative.
-//
-// https://www.w3.org/TR/2022/WD-wasm-core-2-20220419/syntax/modules.html#element-segments
-type ElementMode = byte
-
-const (
-	// ElementModeActive is the mode which requires the runtime to initialize table with the contents in .Init field combined with OffsetExpr.
-	ElementModeActive ElementMode = iota
-	// ElementModePassive is the mode which doesn't require the runtime to initialize table, and only used with OpcodeTableInitName.
-	ElementModePassive
-	// ElementModeDeclarative is introduced in reference-types proposal which can be used to declare function indexes used by OpcodeRefFunc.
-	ElementModeDeclarative
-)
-
-// ElementSegment are initialization instructions for a TableInstance
-//
-// See https://www.w3.org/TR/2019/REC-wasm-core-1-20191205/#syntax-elem
-type ElementSegment struct {
-	// OffsetExpr returns the table element offset to apply to Init indices.
-	// Note: This can be validated prior to instantiation unless it includes OpcodeGlobalGet (an imported global).
-	OffsetExpr ConstantExpression
-
-	// TableIndex is the table's index to which this element segment is applied.
-	// Note: This is used if and only if the Mode is active.
-	TableIndex Index
-
-	// Followings are set/used regardless of the Mode.
-
-	// Init indices are (nullable) table elements where each index is the function index by which the module initialize the table.
-	Init []Index
-
-	// Type holds the type of this element segment, which is the RefType in WebAssembly 2.0.
-	Type RefType
-
-	// Mode is the mode of this element segment.
-	Mode ElementMode
-}
-
-const (
-	// ElementInitNullReference represents the null reference in ElementSegment's Init.
-	// In Wasm spec, an init item represents either Function's Index or null reference,
-	// and in wazero, we limit the maximum number of functions available in a module to
-	// MaximumFunctionIndex. Therefore, it is safe to use 1 << 31 to represent the null
-	// reference in Element segments.
-	ElementInitNullReference Index = 1 << 31
-	// elementInitImportedGlobalReferenceType represents an init item which is resolved via an imported global constexpr.
-	// The actual function reference stored at Global is only known at instantiation-time, so we set this flag
-	// to items of ElementSegment.Init at binary decoding, and unwrap this flag at instantiation to resolve the value.
-	//
-	// This might collide the init element resolved via ref.func instruction which is resolved with the func index at decoding,
-	// but in practice, that is not allowed in wazero thanks to our limit MaximumFunctionIndex. Thus, it is safe to set this flag
-	// in init element to indicate as such.
-	elementInitImportedGlobalReferenceType Index = 1 << 30
-)
-
-// unwrapElementInitGlobalReference takes an item of the init vector of an ElementSegment,
-// and returns the Global index if it is supposed to get generated from a global.
-// ok is true if the given init item is as such.
-func unwrapElementInitGlobalReference(init Index) (_ Index, ok bool) {
-	if init&elementInitImportedGlobalReferenceType == elementInitImportedGlobalReferenceType {
-		return init &^ elementInitImportedGlobalReferenceType, true
-	}
-	return init, false
-}
-
-// WrapGlobalIndexAsElementInit wraps the given index as an init item which is resolved via an imported global value.
-// See the comments on elementInitImportedGlobalReferenceType for more details.
-func WrapGlobalIndexAsElementInit(init Index) Index {
-	return init | elementInitImportedGlobalReferenceType
-}
-
-// IsActive returns true if the element segment is "active" mode which requires the runtime to initialize table
-// with the contents in .Init field.
-func (e *ElementSegment) IsActive() bool {
-	return e.Mode == ElementModeActive
-}
-
-// TableInstance represents a table of (RefTypeFuncref) elements in a module.
-//
-// See https://www.w3.org/TR/2019/REC-wasm-core-1-20191205/#table-instances%E2%91%A0
-type TableInstance struct {
-	// References holds references whose type is either RefTypeFuncref or RefTypeExternref (unsupported).
-	//
-	// Currently, only function references are supported.
-	References []Reference
-
-	// Min is the minimum (function) elements in this table and cannot grow to accommodate ElementSegment.
-	Min uint32
-
-	// Max if present is the maximum (function) elements in this table, or nil if unbounded.
-	Max *uint32
-
-	// Type is either RefTypeFuncref or RefTypeExternRef.
-	Type RefType
-
-	// The following is only used when the table is exported.
-
-	// involvingModuleInstances is a set of module instances which are involved in the table instance.
-	// This is critical for safety purpose because once a table is imported, it can hold any reference to
-	// any function in the owner and importing module instances. Therefore, these module instance,
-	// transitively the compiled modules, must be alive as long as the table instance is alive.
-	involvingModuleInstances []*ModuleInstance
-	// involvingModuleInstancesMutex is a mutex to protect involvingModuleInstances.
-	involvingModuleInstancesMutex sync.RWMutex
-}
-
-// ElementInstance represents an element instance in a module.
-//
-// See https://www.w3.org/TR/2022/WD-wasm-core-2-20220419/exec/runtime.html#element-instances
-type ElementInstance = []Reference
-
-// Reference is the runtime representation of RefType which is either RefTypeFuncref or RefTypeExternref.
-type Reference = uintptr
-
-// validateTable ensures any ElementSegment is valid. This caches results via Module.validatedActiveElementSegments.
-// Note: limitsType are validated by decoders, so not re-validated here.
-func (m *Module) validateTable(enabledFeatures api.CoreFeatures, tables []Table, maximumTableIndex uint32) error {
-	if len(tables) > int(maximumTableIndex) {
-		return fmt.Errorf("too many tables in a module: %d given with limit %d", len(tables), maximumTableIndex)
-	}
-
-	importedTableCount := m.ImportTableCount
-
-	// Create bounds checks as these can err prior to instantiation
-	funcCount := m.ImportFunctionCount + m.SectionElementCount(SectionIDFunction)
-	globalsCount := m.ImportGlobalCount + m.SectionElementCount(SectionIDGlobal)
-
-	// Now, we have to figure out which table elements can be resolved before instantiation and also fail early if there
-	// are any imported globals that are known to be invalid by their declarations.
-	for i := range m.ElementSection {
-		elem := &m.ElementSection[i]
-		idx := Index(i)
-		initCount := uint32(len(elem.Init))
-
-		// Any offset applied is to the element, not the function index: validate here if the funcidx is sound.
-		for ei, init := range elem.Init {
-			if init == ElementInitNullReference {
-				continue
-			}
-			index, ok := unwrapElementInitGlobalReference(init)
-			if ok {
-				if index >= globalsCount {
-					return fmt.Errorf("%s[%d].init[%d] global index %d out of range", SectionIDName(SectionIDElement), idx, ei, index)
-				}
-			} else {
-				if elem.Type == RefTypeExternref {
-					return fmt.Errorf("%s[%d].init[%d] must be ref.null but was %d", SectionIDName(SectionIDElement), idx, ei, init)
-				}
-				if index >= funcCount {
-					return fmt.Errorf("%s[%d].init[%d] func index %d out of range", SectionIDName(SectionIDElement), idx, ei, index)
-				}
-			}
-		}
-
-		if elem.IsActive() {
-			if len(tables) <= int(elem.TableIndex) {
-				return fmt.Errorf("unknown table %d as active element target", elem.TableIndex)
-			}
-
-			t := tables[elem.TableIndex]
-			if t.Type != elem.Type {
-				return fmt.Errorf("element type mismatch: table has %s but element has %s",
-					RefTypeName(t.Type), RefTypeName(elem.Type),
-				)
-			}
-
-			// global.get needs to be discovered during initialization
-			oc := elem.OffsetExpr.Opcode
-			if oc == OpcodeGlobalGet {
-				globalIdx, _, err := leb128.LoadUint32(elem.OffsetExpr.Data)
-				if err != nil {
-					return fmt.Errorf("%s[%d] couldn't read global.get parameter: %w", SectionIDName(SectionIDElement), idx, err)
-				} else if err = m.verifyImportGlobalI32(SectionIDElement, idx, globalIdx); err != nil {
-					return err
-				}
-			} else if oc == OpcodeI32Const {
-				// Per https://github.com/WebAssembly/spec/blob/wg-1.0/test/core/elem.wast#L117 we must pass if imported
-				// table has set its min=0. Per https://github.com/WebAssembly/spec/blob/wg-1.0/test/core/elem.wast#L142, we
-				// have to do fail if module-defined min=0.
-				if !enabledFeatures.IsEnabled(api.CoreFeatureReferenceTypes) && elem.TableIndex >= importedTableCount {
-					// Treat constants as signed as their interpretation is not yet known per /RATIONALE.md
-					o, _, err := leb128.LoadInt32(elem.OffsetExpr.Data)
-					if err != nil {
-						return fmt.Errorf("%s[%d] couldn't read i32.const parameter: %w", SectionIDName(SectionIDElement), idx, err)
-					}
-					offset := Index(o)
-					if err = checkSegmentBounds(t.Min, uint64(initCount)+uint64(offset), idx); err != nil {
-						return err
-					}
-				}
-			} else {
-				return fmt.Errorf("%s[%d] has an invalid const expression: %s", SectionIDName(SectionIDElement), idx, InstructionName(oc))
-			}
-		}
-	}
-	return nil
-}
-
-// buildTable returns TableInstances if the module defines or imports a table.
-//   - importedTables: returned as `tables` unmodified.
-//   - importedGlobals: include all instantiated, imported globals.
-//
-// If the result `init` is non-nil, it is the `tableInit` parameter of Engine.NewModuleEngine.
-//
-// Note: An error is only possible when an ElementSegment.OffsetExpr is out of range of the TableInstance.Min.
-func (m *ModuleInstance) buildTables(module *Module, skipBoundCheck bool) (err error) {
-	idx := module.ImportTableCount
-	for i := range module.TableSection {
-		tsec := &module.TableSection[i]
-		// The module defining the table is the one that sets its Min/Max etc.
-		m.Tables[idx] = &TableInstance{
-			References: make([]Reference, tsec.Min), Min: tsec.Min, Max: tsec.Max,
-			Type: tsec.Type,
-		}
-		idx++
-	}
-
-	if !skipBoundCheck {
-		for elemI := range module.ElementSection { // Do not loop over the value since elementSegments is a slice of value.
-			elem := &module.ElementSection[elemI]
-			table := m.Tables[elem.TableIndex]
-			var offset uint32
-			if elem.OffsetExpr.Opcode == OpcodeGlobalGet {
-				// Ignore error as it's already validated.
-				globalIdx, _, _ := leb128.LoadUint32(elem.OffsetExpr.Data)
-				global := m.Globals[globalIdx]
-				offset = uint32(global.Val)
-			} else { // i32.const
-				// Ignore error as it's already validated.
-				o, _, _ := leb128.LoadInt32(elem.OffsetExpr.Data)
-				offset = uint32(o)
-			}
-
-			// Check to see if we are out-of-bounds
-			initCount := uint64(len(elem.Init))
-			if err = checkSegmentBounds(table.Min, uint64(offset)+initCount, Index(elemI)); err != nil {
-				return
-			}
-		}
-	}
-	return
-}
-
-// checkSegmentBounds fails if the capacity needed for an ElementSegment.Init is larger than limitsType.Min
-//
-// WebAssembly 1.0 (20191205) doesn't forbid growing to accommodate element segments, and spectests are inconsistent.
-// For example, the spectests enforce elements within Table limitsType.Min, but ignore Import.DescTable min. What this
-// means is we have to delay offset checks on imported tables until we link to them.
-// e.g. https://github.com/WebAssembly/spec/blob/wg-1.0/test/core/elem.wast#L117 wants pass on min=0 for import
-// e.g. https://github.com/WebAssembly/spec/blob/wg-1.0/test/core/elem.wast#L142 wants fail on min=0 module-defined
-func checkSegmentBounds(min uint32, requireMin uint64, idx Index) error { // uint64 in case offset was set to -1
-	if requireMin > uint64(min) {
-		return fmt.Errorf("%s[%d].init exceeds min table size", SectionIDName(SectionIDElement), idx)
-	}
-	return nil
-}
-
-func (m *Module) verifyImportGlobalI32(sectionID SectionID, sectionIdx Index, idx uint32) error {
-	ig := uint32(math.MaxUint32) // +1 == 0
-	for i := range m.ImportSection {
-		imp := &m.ImportSection[i]
-		if imp.Type == ExternTypeGlobal {
-			ig++
-			if ig == idx {
-				if imp.DescGlobal.ValType != ValueTypeI32 {
-					return fmt.Errorf("%s[%d] (global.get %d): import[%d].global.ValType != i32", SectionIDName(sectionID), sectionIdx, idx, i)
-				}
-				return nil
-			}
-		}
-	}
-	return fmt.Errorf("%s[%d] (global.get %d): out of range of imported globals", SectionIDName(sectionID), sectionIdx, idx)
-}
-
-// Grow appends the `initialRef` by `delta` times into the References slice.
-// Returns -1 if the operation is not valid, otherwise the old length of the table.
-//
-// https://www.w3.org/TR/2022/WD-wasm-core-2-20220419/exec/instructions.html#xref-syntax-instructions-syntax-instr-table-mathsf-table-grow-x
-func (t *TableInstance) Grow(delta uint32, initialRef Reference) (currentLen uint32) {
-	currentLen = uint32(len(t.References))
-	if delta == 0 {
-		return
-	}
-
-	if newLen := int64(currentLen) + int64(delta); // adding as 64bit ints to avoid overflow.
-	newLen >= math.MaxUint32 || (t.Max != nil && newLen > int64(*t.Max)) {
-		return 0xffffffff // = -1 in signed 32-bit integer.
-	}
-	t.References = append(t.References, make([]uintptr, delta)...)
-
-	// Uses the copy trick for faster filling the new region with the initial value.
-	// https://gist.github.com/taylorza/df2f89d5f9ab3ffd06865062a4cf015d
-	newRegion := t.References[currentLen:]
-	newRegion[0] = initialRef
-	for i := 1; i < len(newRegion); i *= 2 {
-		copy(newRegion[i:], newRegion[:i])
-	}
-	return
-}