mirror of
https://github.com/superseriousbusiness/gotosocial.git
synced 2024-12-24 11:12:11 +00:00
1e7b32490d
This allows for building GoToSocial with [SQLite transpiled to WASM](https://github.com/ncruces/go-sqlite3) and accessed through [Wazero](https://wazero.io/).
844 lines
27 KiB
Go
844 lines
27 KiB
Go
package wazevo
|
|
|
|
import (
|
|
"context"
|
|
"encoding/hex"
|
|
"errors"
|
|
"fmt"
|
|
"runtime"
|
|
"sort"
|
|
"sync"
|
|
"unsafe"
|
|
|
|
"github.com/tetratelabs/wazero/api"
|
|
"github.com/tetratelabs/wazero/experimental"
|
|
"github.com/tetratelabs/wazero/internal/engine/wazevo/backend"
|
|
"github.com/tetratelabs/wazero/internal/engine/wazevo/frontend"
|
|
"github.com/tetratelabs/wazero/internal/engine/wazevo/ssa"
|
|
"github.com/tetratelabs/wazero/internal/engine/wazevo/wazevoapi"
|
|
"github.com/tetratelabs/wazero/internal/filecache"
|
|
"github.com/tetratelabs/wazero/internal/platform"
|
|
"github.com/tetratelabs/wazero/internal/version"
|
|
"github.com/tetratelabs/wazero/internal/wasm"
|
|
)
|
|
|
|
type (
|
|
// engine implements wasm.Engine.
|
|
engine struct {
|
|
wazeroVersion string
|
|
fileCache filecache.Cache
|
|
compiledModules map[wasm.ModuleID]*compiledModule
|
|
// sortedCompiledModules is a list of compiled modules sorted by the initial address of the executable.
|
|
sortedCompiledModules []*compiledModule
|
|
mux sync.RWMutex
|
|
// sharedFunctions is compiled functions shared by all modules.
|
|
sharedFunctions *sharedFunctions
|
|
// setFinalizer defaults to runtime.SetFinalizer, but overridable for tests.
|
|
setFinalizer func(obj interface{}, finalizer interface{})
|
|
|
|
// The followings are reused for compiling shared functions.
|
|
machine backend.Machine
|
|
be backend.Compiler
|
|
}
|
|
|
|
sharedFunctions struct {
|
|
// memoryGrowExecutable is a compiled trampoline executable for memory.grow builtin function.
|
|
memoryGrowExecutable []byte
|
|
// checkModuleExitCode is a compiled trampoline executable for checking module instance exit code. This
|
|
// is used when ensureTermination is true.
|
|
checkModuleExitCode []byte
|
|
// stackGrowExecutable is a compiled executable for growing stack builtin function.
|
|
stackGrowExecutable []byte
|
|
// tableGrowExecutable is a compiled trampoline executable for table.grow builtin function.
|
|
tableGrowExecutable []byte
|
|
// refFuncExecutable is a compiled trampoline executable for ref.func builtin function.
|
|
refFuncExecutable []byte
|
|
// memoryWait32Executable is a compiled trampoline executable for memory.wait32 builtin function
|
|
memoryWait32Executable []byte
|
|
// memoryWait64Executable is a compiled trampoline executable for memory.wait64 builtin function
|
|
memoryWait64Executable []byte
|
|
// memoryNotifyExecutable is a compiled trampoline executable for memory.notify builtin function
|
|
memoryNotifyExecutable []byte
|
|
listenerBeforeTrampolines map[*wasm.FunctionType][]byte
|
|
listenerAfterTrampolines map[*wasm.FunctionType][]byte
|
|
}
|
|
|
|
// compiledModule is a compiled variant of a wasm.Module and ready to be used for instantiation.
|
|
compiledModule struct {
|
|
*executables
|
|
// functionOffsets maps a local function index to the offset in the executable.
|
|
functionOffsets []int
|
|
parent *engine
|
|
module *wasm.Module
|
|
ensureTermination bool
|
|
listeners []experimental.FunctionListener
|
|
listenerBeforeTrampolines []*byte
|
|
listenerAfterTrampolines []*byte
|
|
|
|
// The followings are only available for non host modules.
|
|
|
|
offsets wazevoapi.ModuleContextOffsetData
|
|
sharedFunctions *sharedFunctions
|
|
sourceMap sourceMap
|
|
}
|
|
|
|
executables struct {
|
|
executable []byte
|
|
entryPreambles [][]byte
|
|
}
|
|
)
|
|
|
|
// sourceMap is a mapping from the offset of the executable to the offset of the original wasm binary.
|
|
type sourceMap struct {
|
|
// executableOffsets is a sorted list of offsets of the executable. This is index-correlated with wasmBinaryOffsets,
|
|
// in other words executableOffsets[i] is the offset of the executable which corresponds to the offset of a Wasm
|
|
// binary pointed by wasmBinaryOffsets[i].
|
|
executableOffsets []uintptr
|
|
// wasmBinaryOffsets is the counterpart of executableOffsets.
|
|
wasmBinaryOffsets []uint64
|
|
}
|
|
|
|
var _ wasm.Engine = (*engine)(nil)
|
|
|
|
// NewEngine returns the implementation of wasm.Engine.
|
|
func NewEngine(ctx context.Context, _ api.CoreFeatures, fc filecache.Cache) wasm.Engine {
|
|
machine := newMachine()
|
|
be := backend.NewCompiler(ctx, machine, ssa.NewBuilder())
|
|
e := &engine{
|
|
compiledModules: make(map[wasm.ModuleID]*compiledModule),
|
|
setFinalizer: runtime.SetFinalizer,
|
|
machine: machine,
|
|
be: be,
|
|
fileCache: fc,
|
|
wazeroVersion: version.GetWazeroVersion(),
|
|
}
|
|
e.compileSharedFunctions()
|
|
return e
|
|
}
|
|
|
|
// CompileModule implements wasm.Engine.
|
|
func (e *engine) CompileModule(ctx context.Context, module *wasm.Module, listeners []experimental.FunctionListener, ensureTermination bool) (err error) {
|
|
if wazevoapi.PerfMapEnabled {
|
|
wazevoapi.PerfMap.Lock()
|
|
defer wazevoapi.PerfMap.Unlock()
|
|
}
|
|
|
|
if _, ok, err := e.getCompiledModule(module, listeners, ensureTermination); ok { // cache hit!
|
|
return nil
|
|
} else if err != nil {
|
|
return err
|
|
}
|
|
|
|
if wazevoapi.DeterministicCompilationVerifierEnabled {
|
|
ctx = wazevoapi.NewDeterministicCompilationVerifierContext(ctx, len(module.CodeSection))
|
|
}
|
|
cm, err := e.compileModule(ctx, module, listeners, ensureTermination)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if err = e.addCompiledModule(module, cm); err != nil {
|
|
return err
|
|
}
|
|
|
|
if wazevoapi.DeterministicCompilationVerifierEnabled {
|
|
for i := 0; i < wazevoapi.DeterministicCompilationVerifyingIter; i++ {
|
|
_, err := e.compileModule(ctx, module, listeners, ensureTermination)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
}
|
|
}
|
|
|
|
if len(listeners) > 0 {
|
|
cm.listeners = listeners
|
|
cm.listenerBeforeTrampolines = make([]*byte, len(module.TypeSection))
|
|
cm.listenerAfterTrampolines = make([]*byte, len(module.TypeSection))
|
|
for i := range module.TypeSection {
|
|
typ := &module.TypeSection[i]
|
|
before, after := e.getListenerTrampolineForType(typ)
|
|
cm.listenerBeforeTrampolines[i] = before
|
|
cm.listenerAfterTrampolines[i] = after
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (exec *executables) compileEntryPreambles(m *wasm.Module, machine backend.Machine, be backend.Compiler) {
|
|
exec.entryPreambles = make([][]byte, len(m.TypeSection))
|
|
for i := range m.TypeSection {
|
|
typ := &m.TypeSection[i]
|
|
sig := frontend.SignatureForWasmFunctionType(typ)
|
|
be.Init()
|
|
buf := machine.CompileEntryPreamble(&sig)
|
|
executable := mmapExecutable(buf)
|
|
exec.entryPreambles[i] = executable
|
|
|
|
if wazevoapi.PerfMapEnabled {
|
|
wazevoapi.PerfMap.AddEntry(uintptr(unsafe.Pointer(&executable[0])),
|
|
uint64(len(executable)), fmt.Sprintf("entry_preamble::type=%s", typ.String()))
|
|
}
|
|
}
|
|
}
|
|
|
|
func (e *engine) compileModule(ctx context.Context, module *wasm.Module, listeners []experimental.FunctionListener, ensureTermination bool) (*compiledModule, error) {
|
|
withListener := len(listeners) > 0
|
|
cm := &compiledModule{
|
|
offsets: wazevoapi.NewModuleContextOffsetData(module, withListener), parent: e, module: module,
|
|
ensureTermination: ensureTermination,
|
|
executables: &executables{},
|
|
}
|
|
|
|
if module.IsHostModule {
|
|
return e.compileHostModule(ctx, module, listeners)
|
|
}
|
|
|
|
importedFns, localFns := int(module.ImportFunctionCount), len(module.FunctionSection)
|
|
if localFns == 0 {
|
|
return cm, nil
|
|
}
|
|
|
|
rels := make([]backend.RelocationInfo, 0)
|
|
refToBinaryOffset := make([]int, importedFns+localFns)
|
|
|
|
if wazevoapi.DeterministicCompilationVerifierEnabled {
|
|
// The compilation must be deterministic regardless of the order of functions being compiled.
|
|
wazevoapi.DeterministicCompilationVerifierRandomizeIndexes(ctx)
|
|
}
|
|
|
|
needSourceInfo := module.DWARFLines != nil
|
|
|
|
// Creates new compiler instances which are reused for each function.
|
|
ssaBuilder := ssa.NewBuilder()
|
|
fe := frontend.NewFrontendCompiler(module, ssaBuilder, &cm.offsets, ensureTermination, withListener, needSourceInfo)
|
|
machine := newMachine()
|
|
be := backend.NewCompiler(ctx, machine, ssaBuilder)
|
|
|
|
cm.executables.compileEntryPreambles(module, machine, be)
|
|
|
|
totalSize := 0 // Total binary size of the executable.
|
|
cm.functionOffsets = make([]int, localFns)
|
|
bodies := make([][]byte, localFns)
|
|
|
|
// Trampoline relocation related variables.
|
|
trampolineInterval, callTrampolineIslandSize, err := machine.CallTrampolineIslandInfo(localFns)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
needCallTrampoline := callTrampolineIslandSize > 0
|
|
var callTrampolineIslandOffsets []int // Holds the offsets of trampoline islands.
|
|
|
|
for i := range module.CodeSection {
|
|
if wazevoapi.DeterministicCompilationVerifierEnabled {
|
|
i = wazevoapi.DeterministicCompilationVerifierGetRandomizedLocalFunctionIndex(ctx, i)
|
|
}
|
|
|
|
fidx := wasm.Index(i + importedFns)
|
|
|
|
if wazevoapi.NeedFunctionNameInContext {
|
|
def := module.FunctionDefinition(fidx)
|
|
name := def.DebugName()
|
|
if len(def.ExportNames()) > 0 {
|
|
name = def.ExportNames()[0]
|
|
}
|
|
ctx = wazevoapi.SetCurrentFunctionName(ctx, i, fmt.Sprintf("[%d/%d]%s", i, len(module.CodeSection)-1, name))
|
|
}
|
|
|
|
needListener := len(listeners) > 0 && listeners[i] != nil
|
|
body, relsPerFunc, err := e.compileLocalWasmFunction(ctx, module, wasm.Index(i), fe, ssaBuilder, be, needListener)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("compile function %d/%d: %v", i, len(module.CodeSection)-1, err)
|
|
}
|
|
|
|
// Align 16-bytes boundary.
|
|
totalSize = (totalSize + 15) &^ 15
|
|
cm.functionOffsets[i] = totalSize
|
|
|
|
if needSourceInfo {
|
|
// At the beginning of the function, we add the offset of the function body so that
|
|
// we can resolve the source location of the call site of before listener call.
|
|
cm.sourceMap.executableOffsets = append(cm.sourceMap.executableOffsets, uintptr(totalSize))
|
|
cm.sourceMap.wasmBinaryOffsets = append(cm.sourceMap.wasmBinaryOffsets, module.CodeSection[i].BodyOffsetInCodeSection)
|
|
|
|
for _, info := range be.SourceOffsetInfo() {
|
|
cm.sourceMap.executableOffsets = append(cm.sourceMap.executableOffsets, uintptr(totalSize)+uintptr(info.ExecutableOffset))
|
|
cm.sourceMap.wasmBinaryOffsets = append(cm.sourceMap.wasmBinaryOffsets, uint64(info.SourceOffset))
|
|
}
|
|
}
|
|
|
|
fref := frontend.FunctionIndexToFuncRef(fidx)
|
|
refToBinaryOffset[fref] = totalSize
|
|
|
|
// At this point, relocation offsets are relative to the start of the function body,
|
|
// so we adjust it to the start of the executable.
|
|
for _, r := range relsPerFunc {
|
|
r.Offset += int64(totalSize)
|
|
rels = append(rels, r)
|
|
}
|
|
|
|
bodies[i] = body
|
|
totalSize += len(body)
|
|
if wazevoapi.PrintMachineCodeHexPerFunction {
|
|
fmt.Printf("[[[machine code for %s]]]\n%s\n\n", wazevoapi.GetCurrentFunctionName(ctx), hex.EncodeToString(body))
|
|
}
|
|
|
|
if needCallTrampoline {
|
|
// If the total size exceeds the trampoline interval, we need to add a trampoline island.
|
|
if totalSize/trampolineInterval > len(callTrampolineIslandOffsets) {
|
|
callTrampolineIslandOffsets = append(callTrampolineIslandOffsets, totalSize)
|
|
totalSize += callTrampolineIslandSize
|
|
}
|
|
}
|
|
}
|
|
|
|
// Allocate executable memory and then copy the generated machine code.
|
|
executable, err := platform.MmapCodeSegment(totalSize)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
cm.executable = executable
|
|
|
|
for i, b := range bodies {
|
|
offset := cm.functionOffsets[i]
|
|
copy(executable[offset:], b)
|
|
}
|
|
|
|
if wazevoapi.PerfMapEnabled {
|
|
wazevoapi.PerfMap.Flush(uintptr(unsafe.Pointer(&executable[0])), cm.functionOffsets)
|
|
}
|
|
|
|
if needSourceInfo {
|
|
for i := range cm.sourceMap.executableOffsets {
|
|
cm.sourceMap.executableOffsets[i] += uintptr(unsafe.Pointer(&cm.executable[0]))
|
|
}
|
|
}
|
|
|
|
// Resolve relocations for local function calls.
|
|
if len(rels) > 0 {
|
|
machine.ResolveRelocations(refToBinaryOffset, executable, rels, callTrampolineIslandOffsets)
|
|
}
|
|
|
|
if runtime.GOARCH == "arm64" {
|
|
// On arm64, we cannot give all of rwx at the same time, so we change it to exec.
|
|
if err = platform.MprotectRX(executable); err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
cm.sharedFunctions = e.sharedFunctions
|
|
e.setFinalizer(cm.executables, executablesFinalizer)
|
|
return cm, nil
|
|
}
|
|
|
|
func (e *engine) compileLocalWasmFunction(
|
|
ctx context.Context,
|
|
module *wasm.Module,
|
|
localFunctionIndex wasm.Index,
|
|
fe *frontend.Compiler,
|
|
ssaBuilder ssa.Builder,
|
|
be backend.Compiler,
|
|
needListener bool,
|
|
) (body []byte, rels []backend.RelocationInfo, err error) {
|
|
typIndex := module.FunctionSection[localFunctionIndex]
|
|
typ := &module.TypeSection[typIndex]
|
|
codeSeg := &module.CodeSection[localFunctionIndex]
|
|
|
|
// Initializes both frontend and backend compilers.
|
|
fe.Init(localFunctionIndex, typIndex, typ, codeSeg.LocalTypes, codeSeg.Body, needListener, codeSeg.BodyOffsetInCodeSection)
|
|
be.Init()
|
|
|
|
// Lower Wasm to SSA.
|
|
fe.LowerToSSA()
|
|
if wazevoapi.PrintSSA && wazevoapi.PrintEnabledIndex(ctx) {
|
|
fmt.Printf("[[[SSA for %s]]]%s\n", wazevoapi.GetCurrentFunctionName(ctx), ssaBuilder.Format())
|
|
}
|
|
|
|
if wazevoapi.DeterministicCompilationVerifierEnabled {
|
|
wazevoapi.VerifyOrSetDeterministicCompilationContextValue(ctx, "SSA", ssaBuilder.Format())
|
|
}
|
|
|
|
// Run SSA-level optimization passes.
|
|
ssaBuilder.RunPasses()
|
|
|
|
if wazevoapi.PrintOptimizedSSA && wazevoapi.PrintEnabledIndex(ctx) {
|
|
fmt.Printf("[[[Optimized SSA for %s]]]%s\n", wazevoapi.GetCurrentFunctionName(ctx), ssaBuilder.Format())
|
|
}
|
|
|
|
if wazevoapi.DeterministicCompilationVerifierEnabled {
|
|
wazevoapi.VerifyOrSetDeterministicCompilationContextValue(ctx, "Optimized SSA", ssaBuilder.Format())
|
|
}
|
|
|
|
// Now our ssaBuilder contains the necessary information to further lower them to
|
|
// machine code.
|
|
original, rels, err := be.Compile(ctx)
|
|
if err != nil {
|
|
return nil, nil, fmt.Errorf("ssa->machine code: %v", err)
|
|
}
|
|
|
|
// TODO: optimize as zero copy.
|
|
copied := make([]byte, len(original))
|
|
copy(copied, original)
|
|
return copied, rels, nil
|
|
}
|
|
|
|
func (e *engine) compileHostModule(ctx context.Context, module *wasm.Module, listeners []experimental.FunctionListener) (*compiledModule, error) {
|
|
machine := newMachine()
|
|
be := backend.NewCompiler(ctx, machine, ssa.NewBuilder())
|
|
|
|
num := len(module.CodeSection)
|
|
cm := &compiledModule{module: module, listeners: listeners, executables: &executables{}}
|
|
cm.functionOffsets = make([]int, num)
|
|
totalSize := 0 // Total binary size of the executable.
|
|
bodies := make([][]byte, num)
|
|
var sig ssa.Signature
|
|
for i := range module.CodeSection {
|
|
totalSize = (totalSize + 15) &^ 15
|
|
cm.functionOffsets[i] = totalSize
|
|
|
|
typIndex := module.FunctionSection[i]
|
|
typ := &module.TypeSection[typIndex]
|
|
|
|
// We can relax until the index fits together in ExitCode as we do in wazevoapi.ExitCodeCallGoModuleFunctionWithIndex.
|
|
// However, 1 << 16 should be large enough for a real use case.
|
|
const hostFunctionNumMaximum = 1 << 16
|
|
if i >= hostFunctionNumMaximum {
|
|
return nil, fmt.Errorf("too many host functions (maximum %d)", hostFunctionNumMaximum)
|
|
}
|
|
|
|
sig.ID = ssa.SignatureID(typIndex) // This is important since we reuse the `machine` which caches the ABI based on the SignatureID.
|
|
sig.Params = append(sig.Params[:0],
|
|
ssa.TypeI64, // First argument must be exec context.
|
|
ssa.TypeI64, // The second argument is the moduleContextOpaque of this host module.
|
|
)
|
|
for _, t := range typ.Params {
|
|
sig.Params = append(sig.Params, frontend.WasmTypeToSSAType(t))
|
|
}
|
|
|
|
sig.Results = sig.Results[:0]
|
|
for _, t := range typ.Results {
|
|
sig.Results = append(sig.Results, frontend.WasmTypeToSSAType(t))
|
|
}
|
|
|
|
c := &module.CodeSection[i]
|
|
if c.GoFunc == nil {
|
|
panic("BUG: GoFunc must be set for host module")
|
|
}
|
|
|
|
withListener := len(listeners) > 0 && listeners[i] != nil
|
|
var exitCode wazevoapi.ExitCode
|
|
fn := c.GoFunc
|
|
switch fn.(type) {
|
|
case api.GoModuleFunction:
|
|
exitCode = wazevoapi.ExitCodeCallGoModuleFunctionWithIndex(i, withListener)
|
|
case api.GoFunction:
|
|
exitCode = wazevoapi.ExitCodeCallGoFunctionWithIndex(i, withListener)
|
|
}
|
|
|
|
be.Init()
|
|
machine.CompileGoFunctionTrampoline(exitCode, &sig, true)
|
|
if err := be.Finalize(ctx); err != nil {
|
|
return nil, err
|
|
}
|
|
body := be.Buf()
|
|
|
|
if wazevoapi.PerfMapEnabled {
|
|
name := module.FunctionDefinition(wasm.Index(i)).DebugName()
|
|
wazevoapi.PerfMap.AddModuleEntry(i,
|
|
int64(totalSize),
|
|
uint64(len(body)),
|
|
fmt.Sprintf("trampoline:%s", name))
|
|
}
|
|
|
|
// TODO: optimize as zero copy.
|
|
copied := make([]byte, len(body))
|
|
copy(copied, body)
|
|
bodies[i] = copied
|
|
totalSize += len(body)
|
|
}
|
|
|
|
if totalSize == 0 {
|
|
// Empty module.
|
|
return cm, nil
|
|
}
|
|
|
|
// Allocate executable memory and then copy the generated machine code.
|
|
executable, err := platform.MmapCodeSegment(totalSize)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
cm.executable = executable
|
|
|
|
for i, b := range bodies {
|
|
offset := cm.functionOffsets[i]
|
|
copy(executable[offset:], b)
|
|
}
|
|
|
|
if wazevoapi.PerfMapEnabled {
|
|
wazevoapi.PerfMap.Flush(uintptr(unsafe.Pointer(&executable[0])), cm.functionOffsets)
|
|
}
|
|
|
|
if runtime.GOARCH == "arm64" {
|
|
// On arm64, we cannot give all of rwx at the same time, so we change it to exec.
|
|
if err = platform.MprotectRX(executable); err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
e.setFinalizer(cm.executables, executablesFinalizer)
|
|
return cm, nil
|
|
}
|
|
|
|
// Close implements wasm.Engine.
|
|
func (e *engine) Close() (err error) {
|
|
e.mux.Lock()
|
|
defer e.mux.Unlock()
|
|
e.sortedCompiledModules = nil
|
|
e.compiledModules = nil
|
|
e.sharedFunctions = nil
|
|
return nil
|
|
}
|
|
|
|
// CompiledModuleCount implements wasm.Engine.
|
|
func (e *engine) CompiledModuleCount() uint32 {
|
|
e.mux.RLock()
|
|
defer e.mux.RUnlock()
|
|
return uint32(len(e.compiledModules))
|
|
}
|
|
|
|
// DeleteCompiledModule implements wasm.Engine.
|
|
func (e *engine) DeleteCompiledModule(m *wasm.Module) {
|
|
e.mux.Lock()
|
|
defer e.mux.Unlock()
|
|
cm, ok := e.compiledModules[m.ID]
|
|
if ok {
|
|
if len(cm.executable) > 0 {
|
|
e.deleteCompiledModuleFromSortedList(cm)
|
|
}
|
|
delete(e.compiledModules, m.ID)
|
|
}
|
|
}
|
|
|
|
func (e *engine) addCompiledModuleToSortedList(cm *compiledModule) {
|
|
ptr := uintptr(unsafe.Pointer(&cm.executable[0]))
|
|
|
|
index := sort.Search(len(e.sortedCompiledModules), func(i int) bool {
|
|
return uintptr(unsafe.Pointer(&e.sortedCompiledModules[i].executable[0])) >= ptr
|
|
})
|
|
e.sortedCompiledModules = append(e.sortedCompiledModules, nil)
|
|
copy(e.sortedCompiledModules[index+1:], e.sortedCompiledModules[index:])
|
|
e.sortedCompiledModules[index] = cm
|
|
}
|
|
|
|
func (e *engine) deleteCompiledModuleFromSortedList(cm *compiledModule) {
|
|
ptr := uintptr(unsafe.Pointer(&cm.executable[0]))
|
|
|
|
index := sort.Search(len(e.sortedCompiledModules), func(i int) bool {
|
|
return uintptr(unsafe.Pointer(&e.sortedCompiledModules[i].executable[0])) >= ptr
|
|
})
|
|
if index >= len(e.sortedCompiledModules) {
|
|
return
|
|
}
|
|
copy(e.sortedCompiledModules[index:], e.sortedCompiledModules[index+1:])
|
|
e.sortedCompiledModules = e.sortedCompiledModules[:len(e.sortedCompiledModules)-1]
|
|
}
|
|
|
|
func (e *engine) compiledModuleOfAddr(addr uintptr) *compiledModule {
|
|
e.mux.RLock()
|
|
defer e.mux.RUnlock()
|
|
|
|
index := sort.Search(len(e.sortedCompiledModules), func(i int) bool {
|
|
return uintptr(unsafe.Pointer(&e.sortedCompiledModules[i].executable[0])) > addr
|
|
})
|
|
index -= 1
|
|
if index < 0 {
|
|
return nil
|
|
}
|
|
candidate := e.sortedCompiledModules[index]
|
|
if checkAddrInBytes(addr, candidate.executable) {
|
|
// If a module is already deleted, the found module may have been wrong.
|
|
return candidate
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func checkAddrInBytes(addr uintptr, b []byte) bool {
|
|
return uintptr(unsafe.Pointer(&b[0])) <= addr && addr <= uintptr(unsafe.Pointer(&b[len(b)-1]))
|
|
}
|
|
|
|
// NewModuleEngine implements wasm.Engine.
|
|
func (e *engine) NewModuleEngine(m *wasm.Module, mi *wasm.ModuleInstance) (wasm.ModuleEngine, error) {
|
|
me := &moduleEngine{}
|
|
|
|
// Note: imported functions are resolved in moduleEngine.ResolveImportedFunction.
|
|
me.importedFunctions = make([]importedFunction, m.ImportFunctionCount)
|
|
|
|
compiled, ok := e.getCompiledModuleFromMemory(m)
|
|
if !ok {
|
|
return nil, errors.New("source module must be compiled before instantiation")
|
|
}
|
|
me.parent = compiled
|
|
me.module = mi
|
|
me.listeners = compiled.listeners
|
|
|
|
if m.IsHostModule {
|
|
me.opaque = buildHostModuleOpaque(m, compiled.listeners)
|
|
me.opaquePtr = &me.opaque[0]
|
|
} else {
|
|
if size := compiled.offsets.TotalSize; size != 0 {
|
|
opaque := newAlignedOpaque(size)
|
|
me.opaque = opaque
|
|
me.opaquePtr = &opaque[0]
|
|
}
|
|
}
|
|
return me, nil
|
|
}
|
|
|
|
func (e *engine) compileSharedFunctions() {
|
|
e.sharedFunctions = &sharedFunctions{
|
|
listenerBeforeTrampolines: make(map[*wasm.FunctionType][]byte),
|
|
listenerAfterTrampolines: make(map[*wasm.FunctionType][]byte),
|
|
}
|
|
|
|
e.be.Init()
|
|
{
|
|
src := e.machine.CompileGoFunctionTrampoline(wazevoapi.ExitCodeGrowMemory, &ssa.Signature{
|
|
Params: []ssa.Type{ssa.TypeI64 /* exec context */, ssa.TypeI32},
|
|
Results: []ssa.Type{ssa.TypeI32},
|
|
}, false)
|
|
e.sharedFunctions.memoryGrowExecutable = mmapExecutable(src)
|
|
if wazevoapi.PerfMapEnabled {
|
|
exe := e.sharedFunctions.memoryGrowExecutable
|
|
wazevoapi.PerfMap.AddEntry(uintptr(unsafe.Pointer(&exe[0])), uint64(len(exe)), "memory_grow_trampoline")
|
|
}
|
|
}
|
|
|
|
e.be.Init()
|
|
{
|
|
src := e.machine.CompileGoFunctionTrampoline(wazevoapi.ExitCodeTableGrow, &ssa.Signature{
|
|
Params: []ssa.Type{ssa.TypeI64 /* exec context */, ssa.TypeI32 /* table index */, ssa.TypeI32 /* num */, ssa.TypeI64 /* ref */},
|
|
Results: []ssa.Type{ssa.TypeI32},
|
|
}, false)
|
|
e.sharedFunctions.tableGrowExecutable = mmapExecutable(src)
|
|
if wazevoapi.PerfMapEnabled {
|
|
exe := e.sharedFunctions.tableGrowExecutable
|
|
wazevoapi.PerfMap.AddEntry(uintptr(unsafe.Pointer(&exe[0])), uint64(len(exe)), "table_grow_trampoline")
|
|
}
|
|
}
|
|
|
|
e.be.Init()
|
|
{
|
|
src := e.machine.CompileGoFunctionTrampoline(wazevoapi.ExitCodeCheckModuleExitCode, &ssa.Signature{
|
|
Params: []ssa.Type{ssa.TypeI32 /* exec context */},
|
|
Results: []ssa.Type{ssa.TypeI32},
|
|
}, false)
|
|
e.sharedFunctions.checkModuleExitCode = mmapExecutable(src)
|
|
if wazevoapi.PerfMapEnabled {
|
|
exe := e.sharedFunctions.checkModuleExitCode
|
|
wazevoapi.PerfMap.AddEntry(uintptr(unsafe.Pointer(&exe[0])), uint64(len(exe)), "check_module_exit_code_trampoline")
|
|
}
|
|
}
|
|
|
|
e.be.Init()
|
|
{
|
|
src := e.machine.CompileGoFunctionTrampoline(wazevoapi.ExitCodeRefFunc, &ssa.Signature{
|
|
Params: []ssa.Type{ssa.TypeI64 /* exec context */, ssa.TypeI32 /* function index */},
|
|
Results: []ssa.Type{ssa.TypeI64}, // returns the function reference.
|
|
}, false)
|
|
e.sharedFunctions.refFuncExecutable = mmapExecutable(src)
|
|
if wazevoapi.PerfMapEnabled {
|
|
exe := e.sharedFunctions.refFuncExecutable
|
|
wazevoapi.PerfMap.AddEntry(uintptr(unsafe.Pointer(&exe[0])), uint64(len(exe)), "ref_func_trampoline")
|
|
}
|
|
}
|
|
|
|
e.be.Init()
|
|
{
|
|
src := e.machine.CompileStackGrowCallSequence()
|
|
e.sharedFunctions.stackGrowExecutable = mmapExecutable(src)
|
|
if wazevoapi.PerfMapEnabled {
|
|
exe := e.sharedFunctions.stackGrowExecutable
|
|
wazevoapi.PerfMap.AddEntry(uintptr(unsafe.Pointer(&exe[0])), uint64(len(exe)), "stack_grow_trampoline")
|
|
}
|
|
}
|
|
|
|
e.be.Init()
|
|
{
|
|
src := e.machine.CompileGoFunctionTrampoline(wazevoapi.ExitCodeMemoryWait32, &ssa.Signature{
|
|
// exec context, timeout, expected, addr
|
|
Params: []ssa.Type{ssa.TypeI64, ssa.TypeI64, ssa.TypeI32, ssa.TypeI64},
|
|
// Returns the status.
|
|
Results: []ssa.Type{ssa.TypeI32},
|
|
}, false)
|
|
e.sharedFunctions.memoryWait32Executable = mmapExecutable(src)
|
|
if wazevoapi.PerfMapEnabled {
|
|
exe := e.sharedFunctions.memoryWait32Executable
|
|
wazevoapi.PerfMap.AddEntry(uintptr(unsafe.Pointer(&exe[0])), uint64(len(exe)), "memory_wait32_trampoline")
|
|
}
|
|
}
|
|
|
|
e.be.Init()
|
|
{
|
|
src := e.machine.CompileGoFunctionTrampoline(wazevoapi.ExitCodeMemoryWait64, &ssa.Signature{
|
|
// exec context, timeout, expected, addr
|
|
Params: []ssa.Type{ssa.TypeI64, ssa.TypeI64, ssa.TypeI64, ssa.TypeI64},
|
|
// Returns the status.
|
|
Results: []ssa.Type{ssa.TypeI32},
|
|
}, false)
|
|
e.sharedFunctions.memoryWait64Executable = mmapExecutable(src)
|
|
if wazevoapi.PerfMapEnabled {
|
|
exe := e.sharedFunctions.memoryWait64Executable
|
|
wazevoapi.PerfMap.AddEntry(uintptr(unsafe.Pointer(&exe[0])), uint64(len(exe)), "memory_wait64_trampoline")
|
|
}
|
|
}
|
|
|
|
e.be.Init()
|
|
{
|
|
src := e.machine.CompileGoFunctionTrampoline(wazevoapi.ExitCodeMemoryNotify, &ssa.Signature{
|
|
// exec context, count, addr
|
|
Params: []ssa.Type{ssa.TypeI64, ssa.TypeI32, ssa.TypeI64},
|
|
// Returns the number notified.
|
|
Results: []ssa.Type{ssa.TypeI32},
|
|
}, false)
|
|
e.sharedFunctions.memoryNotifyExecutable = mmapExecutable(src)
|
|
if wazevoapi.PerfMapEnabled {
|
|
exe := e.sharedFunctions.memoryNotifyExecutable
|
|
wazevoapi.PerfMap.AddEntry(uintptr(unsafe.Pointer(&exe[0])), uint64(len(exe)), "memory_notify_trampoline")
|
|
}
|
|
}
|
|
|
|
e.setFinalizer(e.sharedFunctions, sharedFunctionsFinalizer)
|
|
}
|
|
|
|
func sharedFunctionsFinalizer(sf *sharedFunctions) {
|
|
if err := platform.MunmapCodeSegment(sf.memoryGrowExecutable); err != nil {
|
|
panic(err)
|
|
}
|
|
if err := platform.MunmapCodeSegment(sf.checkModuleExitCode); err != nil {
|
|
panic(err)
|
|
}
|
|
if err := platform.MunmapCodeSegment(sf.stackGrowExecutable); err != nil {
|
|
panic(err)
|
|
}
|
|
if err := platform.MunmapCodeSegment(sf.tableGrowExecutable); err != nil {
|
|
panic(err)
|
|
}
|
|
if err := platform.MunmapCodeSegment(sf.refFuncExecutable); err != nil {
|
|
panic(err)
|
|
}
|
|
if err := platform.MunmapCodeSegment(sf.memoryWait32Executable); err != nil {
|
|
panic(err)
|
|
}
|
|
if err := platform.MunmapCodeSegment(sf.memoryWait64Executable); err != nil {
|
|
panic(err)
|
|
}
|
|
if err := platform.MunmapCodeSegment(sf.memoryNotifyExecutable); err != nil {
|
|
panic(err)
|
|
}
|
|
for _, f := range sf.listenerBeforeTrampolines {
|
|
if err := platform.MunmapCodeSegment(f); err != nil {
|
|
panic(err)
|
|
}
|
|
}
|
|
for _, f := range sf.listenerAfterTrampolines {
|
|
if err := platform.MunmapCodeSegment(f); err != nil {
|
|
panic(err)
|
|
}
|
|
}
|
|
|
|
sf.memoryGrowExecutable = nil
|
|
sf.checkModuleExitCode = nil
|
|
sf.stackGrowExecutable = nil
|
|
sf.tableGrowExecutable = nil
|
|
sf.refFuncExecutable = nil
|
|
sf.memoryWait32Executable = nil
|
|
sf.memoryWait64Executable = nil
|
|
sf.memoryNotifyExecutable = nil
|
|
sf.listenerBeforeTrampolines = nil
|
|
sf.listenerAfterTrampolines = nil
|
|
}
|
|
|
|
func executablesFinalizer(exec *executables) {
|
|
if len(exec.executable) > 0 {
|
|
if err := platform.MunmapCodeSegment(exec.executable); err != nil {
|
|
panic(err)
|
|
}
|
|
}
|
|
exec.executable = nil
|
|
|
|
for _, f := range exec.entryPreambles {
|
|
if err := platform.MunmapCodeSegment(f); err != nil {
|
|
panic(err)
|
|
}
|
|
}
|
|
exec.entryPreambles = nil
|
|
}
|
|
|
|
func mmapExecutable(src []byte) []byte {
|
|
executable, err := platform.MmapCodeSegment(len(src))
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
|
|
copy(executable, src)
|
|
|
|
if runtime.GOARCH == "arm64" {
|
|
// On arm64, we cannot give all of rwx at the same time, so we change it to exec.
|
|
if err = platform.MprotectRX(executable); err != nil {
|
|
panic(err)
|
|
}
|
|
}
|
|
return executable
|
|
}
|
|
|
|
func (cm *compiledModule) functionIndexOf(addr uintptr) wasm.Index {
|
|
addr -= uintptr(unsafe.Pointer(&cm.executable[0]))
|
|
offset := cm.functionOffsets
|
|
index := sort.Search(len(offset), func(i int) bool {
|
|
return offset[i] > int(addr)
|
|
})
|
|
index--
|
|
if index < 0 {
|
|
panic("BUG")
|
|
}
|
|
return wasm.Index(index)
|
|
}
|
|
|
|
func (e *engine) getListenerTrampolineForType(functionType *wasm.FunctionType) (before, after *byte) {
|
|
e.mux.Lock()
|
|
defer e.mux.Unlock()
|
|
|
|
beforeBuf, ok := e.sharedFunctions.listenerBeforeTrampolines[functionType]
|
|
afterBuf := e.sharedFunctions.listenerAfterTrampolines[functionType]
|
|
if ok {
|
|
return &beforeBuf[0], &afterBuf[0]
|
|
}
|
|
|
|
beforeSig, afterSig := frontend.SignatureForListener(functionType)
|
|
|
|
e.be.Init()
|
|
buf := e.machine.CompileGoFunctionTrampoline(wazevoapi.ExitCodeCallListenerBefore, beforeSig, false)
|
|
beforeBuf = mmapExecutable(buf)
|
|
|
|
e.be.Init()
|
|
buf = e.machine.CompileGoFunctionTrampoline(wazevoapi.ExitCodeCallListenerAfter, afterSig, false)
|
|
afterBuf = mmapExecutable(buf)
|
|
|
|
e.sharedFunctions.listenerBeforeTrampolines[functionType] = beforeBuf
|
|
e.sharedFunctions.listenerAfterTrampolines[functionType] = afterBuf
|
|
return &beforeBuf[0], &afterBuf[0]
|
|
}
|
|
|
|
func (cm *compiledModule) getSourceOffset(pc uintptr) uint64 {
|
|
offsets := cm.sourceMap.executableOffsets
|
|
if len(offsets) == 0 {
|
|
return 0
|
|
}
|
|
|
|
index := sort.Search(len(offsets), func(i int) bool {
|
|
return offsets[i] >= pc
|
|
})
|
|
|
|
index--
|
|
if index < 0 {
|
|
return 0
|
|
}
|
|
return cm.sourceMap.wasmBinaryOffsets[index]
|
|
}
|