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node_wasi.cc
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node_wasi.cc
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#include "env-inl.h"
#include "base_object-inl.h"
#include "debug_utils-inl.h"
#include "memory_tracker-inl.h"
#include "node_mem-inl.h"
#include "util-inl.h"
#include "node.h"
#include "node_errors.h"
#include "uv.h"
#include "uvwasi.h"
#include "node_wasi.h"
namespace node {
namespace wasi {
template <typename... Args>
inline void Debug(WASI& wasi, Args&&... args) {
Debug(wasi.env(), DebugCategory::WASI, std::forward<Args>(args)...);
}
template <typename... Args>
inline void Debug(WASI* wasi, Args&&... args) {
Debug(wasi->env(), DebugCategory::WASI, std::forward<Args>(args)...);
}
#define ASSIGN_INITIALIZED_OR_RETURN_UNWRAP(ptr, obj) \
do { \
ASSIGN_OR_RETURN_UNWRAP(ptr, obj); \
if ((*(ptr))->memory_.IsEmpty()) { \
THROW_ERR_WASI_NOT_STARTED(Environment::GetCurrent(args)); \
return; \
} \
} while (0)
#define RETURN_IF_BAD_ARG_COUNT(args, expected) \
do { \
if ((args).Length() != (expected)) { \
(args).GetReturnValue().Set(UVWASI_EINVAL); \
return; \
} \
} while (0)
#define CHECK_TO_TYPE_OR_RETURN(args, input, type, result) \
do { \
if (!(input)->Is##type()) { \
(args).GetReturnValue().Set(UVWASI_EINVAL); \
return; \
} \
(result) = (input).As<type>()->Value(); \
} while (0)
#define UNWRAP_BIGINT_OR_RETURN(args, input, type, result) \
do { \
if (!(input)->IsBigInt()) { \
(args).GetReturnValue().Set(UVWASI_EINVAL); \
return; \
} \
Local<BigInt> js_value = (input).As<BigInt>(); \
bool lossless; \
(result) = js_value->type ## Value(&lossless); \
} while (0)
#define GET_BACKING_STORE_OR_RETURN(wasi, args, mem_ptr, mem_size) \
do { \
Local<WasmMemoryObject> _memory = \
PersistentToLocal::Strong((wasi)->memory_); \
std::shared_ptr<BackingStore> _backing_store = \
_memory->Buffer()->GetBackingStore(); \
*(mem_size) = _backing_store->ByteLength(); \
*(mem_ptr) = static_cast<char*>(_backing_store->Data()); \
CHECK(mem_ptr != nullptr); \
} while (0)
#define CHECK_BOUNDS_OR_RETURN(args, mem_size, offset, buf_size) \
do { \
if (!uvwasi_serdes_check_bounds((offset), (mem_size), (buf_size))) { \
(args).GetReturnValue().Set(UVWASI_EOVERFLOW); \
return; \
} \
} while (0)
#define CHECK_BOUNDS_OR_RETURN2(mem_size, offset, buf_size) \
do { \
if (!uvwasi_serdes_check_bounds((offset), (mem_size), (buf_size))) { \
return UVWASI_EOVERFLOW; \
} \
} while (0)
using v8::Array;
using v8::BackingStore;
using v8::BigInt;
using v8::CFunction;
using v8::Context;
using v8::Exception;
using v8::FastApiCallbackOptions;
using v8::FunctionCallbackInfo;
using v8::FunctionTemplate;
using v8::Integer;
using v8::Isolate;
using v8::Local;
using v8::MaybeLocal;
using v8::Object;
using v8::Signature;
using v8::String;
using v8::Uint32;
using v8::Value;
using v8::WasmMemoryObject;
static MaybeLocal<Value> WASIException(Local<Context> context,
int errorno,
const char* syscall) {
Isolate* isolate = context->GetIsolate();
Environment* env = Environment::GetCurrent(context);
CHECK_NOT_NULL(env);
const char* err_name = uvwasi_embedder_err_code_to_string(errorno);
Local<String> js_code = OneByteString(isolate, err_name);
Local<String> js_syscall = OneByteString(isolate, syscall);
Local<String> js_msg = js_code;
js_msg =
String::Concat(isolate, js_msg, FIXED_ONE_BYTE_STRING(isolate, ", "));
js_msg = String::Concat(isolate, js_msg, js_syscall);
Local<Object> e;
if (!Exception::Error(js_msg)->ToObject(context).ToLocal(&e))
return MaybeLocal<Value>();
if (e->Set(context,
env->errno_string(),
Integer::New(isolate, errorno)).IsNothing() ||
e->Set(context, env->code_string(), js_code).IsNothing() ||
e->Set(context, env->syscall_string(), js_syscall).IsNothing()) {
return MaybeLocal<Value>();
}
return e;
}
WASI::WASI(Environment* env,
Local<Object> object,
uvwasi_options_t* options) : BaseObject(env, object) {
MakeWeak();
alloc_info_ = MakeAllocator();
options->allocator = &alloc_info_;
int err = uvwasi_init(&uvw_, options);
if (err != UVWASI_ESUCCESS) {
Local<Value> exception;
if (!WASIException(env->context(), err, "uvwasi_init").ToLocal(&exception))
return;
env->isolate()->ThrowException(exception);
}
}
WASI::~WASI() {
uvwasi_destroy(&uvw_);
CHECK_EQ(current_uvwasi_memory_, 0);
}
void WASI::MemoryInfo(MemoryTracker* tracker) const {
tracker->TrackField("memory", memory_);
tracker->TrackFieldWithSize("uvwasi_memory", current_uvwasi_memory_);
}
void WASI::CheckAllocatedSize(size_t previous_size) const {
CHECK_GE(current_uvwasi_memory_, previous_size);
}
void WASI::IncreaseAllocatedSize(size_t size) {
current_uvwasi_memory_ += size;
}
void WASI::DecreaseAllocatedSize(size_t size) {
current_uvwasi_memory_ -= size;
}
void WASI::New(const FunctionCallbackInfo<Value>& args) {
CHECK(args.IsConstructCall());
CHECK_EQ(args.Length(), 4);
CHECK(args[0]->IsArray());
CHECK(args[1]->IsArray());
CHECK(args[2]->IsArray());
CHECK(args[3]->IsArray());
Environment* env = Environment::GetCurrent(args);
Local<Context> context = env->context();
Local<Array> argv = args[0].As<Array>();
const uint32_t argc = argv->Length();
uvwasi_options_t options;
uvwasi_options_init(&options);
Local<Array> stdio = args[3].As<Array>();
CHECK_EQ(stdio->Length(), 3);
options.in = stdio->Get(context, 0).ToLocalChecked()->
Int32Value(context).FromJust();
options.out = stdio->Get(context, 1).ToLocalChecked()->
Int32Value(context).FromJust();
options.err = stdio->Get(context, 2).ToLocalChecked()->
Int32Value(context).FromJust();
options.fd_table_size = 3;
options.argc = argc;
options.argv =
const_cast<const char**>(argc == 0 ? nullptr : new char*[argc]);
for (uint32_t i = 0; i < argc; i++) {
auto arg = argv->Get(context, i).ToLocalChecked();
CHECK(arg->IsString());
node::Utf8Value str(env->isolate(), arg);
options.argv[i] = strdup(*str);
CHECK_NOT_NULL(options.argv[i]);
}
Local<Array> env_pairs = args[1].As<Array>();
const uint32_t envc = env_pairs->Length();
options.envp = const_cast<const char**>(new char*[envc + 1]);
for (uint32_t i = 0; i < envc; i++) {
auto pair = env_pairs->Get(context, i).ToLocalChecked();
CHECK(pair->IsString());
node::Utf8Value str(env->isolate(), pair);
options.envp[i] = strdup(*str);
CHECK_NOT_NULL(options.envp[i]);
}
options.envp[envc] = nullptr;
Local<Array> preopens = args[2].As<Array>();
CHECK_EQ(preopens->Length() % 2, 0);
options.preopenc = preopens->Length() / 2;
options.preopens = Calloc<uvwasi_preopen_t>(options.preopenc);
int index = 0;
for (uint32_t i = 0; i < preopens->Length(); i += 2) {
auto mapped = preopens->Get(context, i).ToLocalChecked();
auto real = preopens->Get(context, i + 1).ToLocalChecked();
CHECK(mapped->IsString());
CHECK(real->IsString());
node::Utf8Value mapped_path(env->isolate(), mapped);
node::Utf8Value real_path(env->isolate(), real);
options.preopens[index].mapped_path = strdup(*mapped_path);
CHECK_NOT_NULL(options.preopens[index].mapped_path);
options.preopens[index].real_path = strdup(*real_path);
CHECK_NOT_NULL(options.preopens[index].real_path);
index++;
}
new WASI(env, args.This(), &options);
if (options.argv != nullptr) {
for (uint32_t i = 0; i < argc; i++)
free(const_cast<char*>(options.argv[i]));
delete[] options.argv;
}
for (uint32_t i = 0; options.envp[i]; i++)
free(const_cast<char*>(options.envp[i]));
delete[] options.envp;
if (options.preopens != nullptr) {
for (uint32_t i = 0; i < options.preopenc; i++) {
free(const_cast<char*>(options.preopens[i].mapped_path));
free(const_cast<char*>(options.preopens[i].real_path));
}
free(options.preopens);
}
}
template <typename FT, FT F, typename R, typename... Args>
void WASI::WasiFunction<FT, F, R, Args...>::SetFunction(
Environment* env, const char* name, Local<FunctionTemplate> tmpl) {
auto c_function = CFunction::Make(FastCallback);
Local<FunctionTemplate> t =
v8::FunctionTemplate::New(env->isolate(),
SlowCallback,
Local<Value>(),
Local<Signature>(),
sizeof...(Args),
v8::ConstructorBehavior::kThrow,
v8::SideEffectType::kHasSideEffect,
&c_function);
const v8::NewStringType type = v8::NewStringType::kInternalized;
v8::Local<v8::String> name_string =
v8::String::NewFromUtf8(env->isolate(), name, type).ToLocalChecked();
tmpl->PrototypeTemplate()->Set(name_string, t);
t->SetClassName(name_string);
}
template <typename FT, FT F, typename R, typename... Args>
R WASI::WasiFunction<FT, F, R, Args...>::FastCallback(
Local<Object> receiver, Args... args, FastApiCallbackOptions& options) {
WASI* wasi = reinterpret_cast<WASI*>(BaseObject::FromJSObject(receiver));
if (UNLIKELY(wasi == nullptr)) return UVWASI_EINVAL;
if (UNLIKELY(options.wasm_memory == nullptr)) {
// fallback to slow path which to throw an error about missing memory.
options.fallback = true;
return UVWASI_EINVAL;
}
uint8_t* memory = nullptr;
CHECK(LIKELY(options.wasm_memory->getStorageIfAligned(&memory)));
return F(*wasi,
{reinterpret_cast<char*>(memory), options.wasm_memory->length()},
args...);
}
namespace {
template <typename VT>
static bool CheckType(Local<Value> v);
template <typename VT>
static VT ConvertType(Local<Value> V);
template <>
bool CheckType<uint32_t>(Local<Value> value) {
return value->IsUint32();
}
template <>
uint32_t ConvertType(Local<Value> value) {
return value.As<Uint32>()->Value();
}
template <>
bool CheckType<uint64_t>(Local<Value> value) {
return value->IsBigInt();
}
template <>
uint64_t ConvertType(Local<Value> value) {
Local<BigInt> js_value = value.As<BigInt>();
bool lossless;
return js_value->Uint64Value(&lossless);
}
template <>
bool CheckType<int64_t>(Local<Value> value) {
return value->IsBigInt();
}
template <>
int64_t ConvertType(Local<Value> value) {
Local<BigInt> js_value = value.As<BigInt>();
bool lossless;
return js_value->Int64Value(&lossless);
}
template <typename T>
bool CheckTypes(const FunctionCallbackInfo<Value>& info, int i, T) {
return CheckType<T>(info[i]);
}
template <typename T, typename... Ts>
bool CheckTypes(const FunctionCallbackInfo<Value>& info,
int i,
T arg,
Ts... args) {
if (!CheckTypes<T>(info, i, arg)) return false;
return CheckTypes<Ts...>(info, i + 1, args...);
}
template <typename... Args>
bool CheckTypes(const FunctionCallbackInfo<Value>& info) {
return CheckTypes<Args...>(info, 0, Args()...);
}
template <>
bool CheckTypes(const FunctionCallbackInfo<Value>& info) {
return true;
}
} // namespace
template <typename FT, FT F, typename R, typename... Args>
template <std::size_t... Indices>
void WASI::WasiFunction<FT, F, R, Args...>::InnerSlowCallback(
std::index_sequence<Indices...>, const FunctionCallbackInfo<Value>& args) {
if (args.Length() != sizeof...(Args)) {
args.GetReturnValue().Set(UVWASI_EINVAL);
return;
}
if (!CheckTypes<Args...>(args)) {
args.GetReturnValue().Set(UVWASI_EINVAL);
return;
}
WASI* wasi;
ASSIGN_OR_RETURN_UNWRAP(&wasi, args.This());
if (wasi->memory_.IsEmpty()) {
THROW_ERR_WASI_NOT_STARTED(Environment::GetCurrent(args));
return;
}
Local<WasmMemoryObject> memory = PersistentToLocal::Strong(wasi->memory_);
std::shared_ptr<BackingStore> backing_store =
memory->Buffer()->GetBackingStore();
size_t mem_size = backing_store->ByteLength();
char* mem_data = static_cast<char*>(backing_store->Data());
CHECK(mem_data != nullptr);
args.GetReturnValue().Set(
F(*wasi, {mem_data, mem_size}, ConvertType<Args>(args[Indices])...));
}
template <typename FT, FT F, typename R, typename... Args>
void WASI::WasiFunction<FT, F, R, Args...>::SlowCallback(
const FunctionCallbackInfo<Value>& args) {
InnerSlowCallback(std::make_index_sequence<sizeof...(Args)>{}, args);
}
template <typename FT, FT F, typename R, typename... Args>
static void SetFunction(R (*f)(WASI&, WasmMemory, Args...),
Environment* env,
const char* name,
Local<FunctionTemplate> tmpl) {
WASI::WasiFunction<FT, F, R, Args...>::SetFunction(env, name, tmpl);
}
uint32_t WASI::ArgsGet(WASI& wasi,
WasmMemory memory,
uint32_t argv_offset,
uint32_t argv_buf_offset) {
Debug(wasi, "args_get(%d, %d)\n", argv_offset, argv_buf_offset);
CHECK_BOUNDS_OR_RETURN2(
memory.size, argv_buf_offset, wasi.uvw_.argv_buf_size);
CHECK_BOUNDS_OR_RETURN2(
memory.size, argv_offset, wasi.uvw_.argc * UVWASI_SERDES_SIZE_uint32_t);
std::vector<char*> argv(wasi.uvw_.argc);
char* argv_buf = &memory.data[argv_buf_offset];
uvwasi_errno_t err = uvwasi_args_get(&wasi.uvw_, argv.data(), argv_buf);
if (err == UVWASI_ESUCCESS) {
for (size_t i = 0; i < wasi.uvw_.argc; i++) {
uint32_t offset =
static_cast<uint32_t>(argv_buf_offset + (argv[i] - argv[0]));
uvwasi_serdes_write_uint32_t(
memory.data, argv_offset + (i * UVWASI_SERDES_SIZE_uint32_t), offset);
}
}
return err;
}
uint32_t WASI::ArgsSizesGet(WASI& wasi,
WasmMemory memory,
uint32_t argc_offset,
uint32_t argv_buf_offset) {
Debug(wasi, "args_sizes_get(%d, %d)\n", argc_offset, argv_buf_offset);
CHECK_BOUNDS_OR_RETURN2(memory.size, argc_offset, UVWASI_SERDES_SIZE_size_t);
CHECK_BOUNDS_OR_RETURN2(
memory.size, argv_buf_offset, UVWASI_SERDES_SIZE_size_t);
uvwasi_size_t argc;
uvwasi_size_t argv_buf_size;
uvwasi_errno_t err = uvwasi_args_sizes_get(&wasi.uvw_, &argc, &argv_buf_size);
if (err == UVWASI_ESUCCESS) {
uvwasi_serdes_write_size_t(memory.data, argc_offset, argc);
uvwasi_serdes_write_size_t(memory.data, argv_buf_offset, argv_buf_size);
}
return err;
}
uint32_t WASI::ClockResGet(WASI& wasi,
WasmMemory memory,
uint32_t clock_id,
uint32_t resolution_ptr) {
Debug(wasi, "clock_res_get(%d, %d)\n", clock_id, resolution_ptr);
CHECK_BOUNDS_OR_RETURN2(
memory.size, resolution_ptr, UVWASI_SERDES_SIZE_timestamp_t);
uvwasi_timestamp_t resolution;
uvwasi_errno_t err = uvwasi_clock_res_get(&wasi.uvw_, clock_id, &resolution);
if (err == UVWASI_ESUCCESS)
uvwasi_serdes_write_timestamp_t(memory.data, resolution_ptr, resolution);
return err;
}
uint32_t WASI::ClockTimeGet(WASI& wasi,
WasmMemory memory,
uint32_t clock_id,
uint64_t precision,
uint32_t time_ptr) {
Debug(wasi, "clock_time_get(%d, %d, %d)\n", clock_id, precision, time_ptr);
CHECK_BOUNDS_OR_RETURN2(
memory.size, time_ptr, UVWASI_SERDES_SIZE_timestamp_t);
uvwasi_timestamp_t time;
uvwasi_errno_t err =
uvwasi_clock_time_get(&wasi.uvw_, clock_id, precision, &time);
if (err == UVWASI_ESUCCESS)
uvwasi_serdes_write_timestamp_t(memory.data, time_ptr, time);
return err;
}
uint32_t WASI::EnvironGet(WASI& wasi,
WasmMemory memory,
uint32_t environ_offset,
uint32_t environ_buf_offset) {
Debug(wasi, "environ_get(%d, %d)\n", environ_offset, environ_buf_offset);
CHECK_BOUNDS_OR_RETURN2(
memory.size, environ_buf_offset, wasi.uvw_.env_buf_size);
CHECK_BOUNDS_OR_RETURN2(memory.size,
environ_offset,
wasi.uvw_.envc * UVWASI_SERDES_SIZE_uint32_t);
std::vector<char*> environment(wasi.uvw_.envc);
char* environ_buf = &memory.data[environ_buf_offset];
uvwasi_errno_t err =
uvwasi_environ_get(&wasi.uvw_, environment.data(), environ_buf);
if (err == UVWASI_ESUCCESS) {
for (size_t i = 0; i < wasi.uvw_.envc; i++) {
uint32_t offset = static_cast<uint32_t>(
environ_buf_offset + (environment[i] - environment[0]));
uvwasi_serdes_write_uint32_t(
memory.data,
environ_offset + (i * UVWASI_SERDES_SIZE_uint32_t),
offset);
}
}
return err;
}
uint32_t WASI::EnvironSizesGet(WASI& wasi,
WasmMemory memory,
uint32_t envc_offset,
uint32_t env_buf_offset) {
Debug(wasi, "environ_sizes_get(%d, %d)\n", envc_offset, env_buf_offset);
CHECK_BOUNDS_OR_RETURN2(memory.size, envc_offset, UVWASI_SERDES_SIZE_size_t);
CHECK_BOUNDS_OR_RETURN2(
memory.size, env_buf_offset, UVWASI_SERDES_SIZE_size_t);
uvwasi_size_t envc;
uvwasi_size_t env_buf_size;
uvwasi_errno_t err =
uvwasi_environ_sizes_get(&wasi.uvw_, &envc, &env_buf_size);
if (err == UVWASI_ESUCCESS) {
uvwasi_serdes_write_size_t(memory.data, envc_offset, envc);
uvwasi_serdes_write_size_t(memory.data, env_buf_offset, env_buf_size);
}
return err;
}
uint32_t WASI::FdAdvise(WASI& wasi,
WasmMemory,
uint32_t fd,
uint64_t offset,
uint64_t len,
uint32_t advice) {
Debug(wasi, "fd_advise(%d, %d, %d, %d)\n", fd, offset, len, advice);
return uvwasi_fd_advise(&wasi.uvw_, fd, offset, len, advice);
}
uint32_t WASI::FdAllocate(
WASI& wasi, WasmMemory, uint32_t fd, uint64_t offset, uint64_t len) {
Debug(wasi, "fd_allocate(%d, %d, %d)\n", fd, offset, len);
return uvwasi_fd_allocate(&wasi.uvw_, fd, offset, len);
}
uint32_t WASI::FdClose(WASI& wasi, WasmMemory, uint32_t fd) {
Debug(wasi, "fd_close(%d)\n", fd);
return uvwasi_fd_close(&wasi.uvw_, fd);
}
uint32_t WASI::FdDatasync(WASI& wasi, WasmMemory, uint32_t fd) {
Debug(wasi, "fd_datasync(%d)\n", fd);
return uvwasi_fd_datasync(&wasi.uvw_, fd);
}
uint32_t WASI::FdFdstatGet(WASI& wasi,
WasmMemory memory,
uint32_t fd,
uint32_t buf) {
Debug(wasi, "fd_fdstat_get(%d, %d)\n", fd, buf);
CHECK_BOUNDS_OR_RETURN2(memory.size, buf, UVWASI_SERDES_SIZE_fdstat_t);
uvwasi_fdstat_t stats;
uvwasi_errno_t err = uvwasi_fd_fdstat_get(&wasi.uvw_, fd, &stats);
if (err == UVWASI_ESUCCESS)
uvwasi_serdes_write_fdstat_t(memory.data, buf, &stats);
return err;
}
uint32_t WASI::FdFdstatSetFlags(WASI& wasi,
WasmMemory,
uint32_t fd,
uint32_t flags) {
Debug(wasi, "fd_fdstat_set_flags(%d, %d)\n", fd, flags);
return uvwasi_fd_fdstat_set_flags(&wasi.uvw_, fd, flags);
}
uint32_t WASI::FdFdstatSetRights(WASI& wasi,
WasmMemory,
uint32_t fd,
uint64_t fs_rights_base,
uint64_t fs_rights_inheriting) {
Debug(wasi,
"fd_fdstat_set_rights(%d, %d, %d)\n",
fd,
fs_rights_base,
fs_rights_inheriting);
return uvwasi_fd_fdstat_set_rights(
&wasi.uvw_, fd, fs_rights_base, fs_rights_inheriting);
}
uint32_t WASI::FdFilestatGet(WASI& wasi,
WasmMemory memory,
uint32_t fd,
uint32_t buf) {
Debug(wasi, "fd_filestat_get(%d, %d)\n", fd, buf);
CHECK_BOUNDS_OR_RETURN2(memory.size, buf, UVWASI_SERDES_SIZE_filestat_t);
uvwasi_filestat_t stats;
uvwasi_errno_t err = uvwasi_fd_filestat_get(&wasi.uvw_, fd, &stats);
if (err == UVWASI_ESUCCESS)
uvwasi_serdes_write_filestat_t(memory.data, buf, &stats);
return err;
}
uint32_t WASI::FdFilestatSetSize(WASI& wasi,
WasmMemory,
uint32_t fd,
uint64_t st_size) {
Debug(wasi, "fd_filestat_set_size(%d, %d)\n", fd, st_size);
return uvwasi_fd_filestat_set_size(&wasi.uvw_, fd, st_size);
}
uint32_t WASI::FdFilestatSetTimes(WASI& wasi,
WasmMemory,
uint32_t fd,
uint64_t st_atim,
uint64_t st_mtim,
uint32_t fst_flags) {
Debug(wasi,
"fd_filestat_set_times(%d, %d, %d, %d)\n",
fd,
st_atim,
st_mtim,
fst_flags);
return uvwasi_fd_filestat_set_times(
&wasi.uvw_, fd, st_atim, st_mtim, fst_flags);
}
uint32_t WASI::FdPread(WASI& wasi,
WasmMemory memory,
uint32_t fd,
uint32_t iovs_ptr,
uint32_t iovs_len,
uint64_t offset,
uint32_t nread_ptr) {
Debug(wasi,
"uvwasi_fd_pread(%d, %d, %d, %d, %d)\n",
fd,
iovs_ptr,
iovs_len,
offset,
nread_ptr);
CHECK_BOUNDS_OR_RETURN2(
memory.size, iovs_ptr, iovs_len * UVWASI_SERDES_SIZE_iovec_t);
CHECK_BOUNDS_OR_RETURN2(memory.size, nread_ptr, UVWASI_SERDES_SIZE_size_t);
std::vector<uvwasi_iovec_t> iovs(iovs_len);
uvwasi_errno_t err;
err = uvwasi_serdes_readv_iovec_t(
memory.data, memory.size, iovs_ptr, iovs.data(), iovs_len);
if (err != UVWASI_ESUCCESS) {
return err;
}
uvwasi_size_t nread;
err = uvwasi_fd_pread(&wasi.uvw_, fd, iovs.data(), iovs_len, offset, &nread);
if (err == UVWASI_ESUCCESS)
uvwasi_serdes_write_size_t(memory.data, nread_ptr, nread);
return err;
}
uint32_t WASI::FdPrestatGet(WASI& wasi,
WasmMemory memory,
uint32_t fd,
uint32_t buf) {
Debug(wasi, "fd_prestat_get(%d, %d)\n", fd, buf);
CHECK_BOUNDS_OR_RETURN2(memory.size, buf, UVWASI_SERDES_SIZE_prestat_t);
uvwasi_prestat_t prestat;
uvwasi_errno_t err = uvwasi_fd_prestat_get(&wasi.uvw_, fd, &prestat);
if (err == UVWASI_ESUCCESS)
uvwasi_serdes_write_prestat_t(memory.data, buf, &prestat);
return err;
}
uint32_t WASI::FdPrestatDirName(WASI& wasi,
WasmMemory memory,
uint32_t fd,
uint32_t path_ptr,
uint32_t path_len) {
Debug(wasi, "fd_prestat_dir_name(%d, %d, %d)\n", fd, path_ptr, path_len);
CHECK_BOUNDS_OR_RETURN2(memory.size, path_ptr, path_len);
return uvwasi_fd_prestat_dir_name(
&wasi.uvw_, fd, &memory.data[path_ptr], path_len);
}
uint32_t WASI::FdPwrite(WASI& wasi,
WasmMemory memory,
uint32_t fd,
uint32_t iovs_ptr,
uint32_t iovs_len,
uint64_t offset,
uint32_t nwritten_ptr) {
Debug(wasi,
"uvwasi_fd_pwrite(%d, %d, %d, %d, %d)\n",
fd,
iovs_ptr,
iovs_len,
offset,
nwritten_ptr);
CHECK_BOUNDS_OR_RETURN2(
memory.size, iovs_ptr, iovs_len * UVWASI_SERDES_SIZE_ciovec_t);
CHECK_BOUNDS_OR_RETURN2(memory.size, nwritten_ptr, UVWASI_SERDES_SIZE_size_t);
std::vector<uvwasi_ciovec_t> iovs(iovs_len);
uvwasi_errno_t err;
err = uvwasi_serdes_readv_ciovec_t(
memory.data, memory.size, iovs_ptr, iovs.data(), iovs_len);
if (err != UVWASI_ESUCCESS) {
return err;
}
uvwasi_size_t nwritten;
err = uvwasi_fd_pwrite(
&wasi.uvw_, fd, iovs.data(), iovs_len, offset, &nwritten);
if (err == UVWASI_ESUCCESS)
uvwasi_serdes_write_size_t(memory.data, nwritten_ptr, nwritten);
return err;
}
void WASI::FdRead(const FunctionCallbackInfo<Value>& args) {
WASI* wasi;
uint32_t fd;
uint32_t iovs_ptr;
uint32_t iovs_len;
uint32_t nread_ptr;
char* memory;
size_t mem_size;
RETURN_IF_BAD_ARG_COUNT(args, 4);
CHECK_TO_TYPE_OR_RETURN(args, args[0], Uint32, fd);
CHECK_TO_TYPE_OR_RETURN(args, args[1], Uint32, iovs_ptr);
CHECK_TO_TYPE_OR_RETURN(args, args[2], Uint32, iovs_len);
CHECK_TO_TYPE_OR_RETURN(args, args[3], Uint32, nread_ptr);
ASSIGN_INITIALIZED_OR_RETURN_UNWRAP(&wasi, args.This());
Debug(wasi, "fd_read(%d, %d, %d, %d)\n", fd, iovs_ptr, iovs_len, nread_ptr);
GET_BACKING_STORE_OR_RETURN(wasi, args, &memory, &mem_size);
CHECK_BOUNDS_OR_RETURN(args,
mem_size,
iovs_ptr,
iovs_len * UVWASI_SERDES_SIZE_iovec_t);
CHECK_BOUNDS_OR_RETURN(args, mem_size, nread_ptr, UVWASI_SERDES_SIZE_size_t);
std::vector<uvwasi_iovec_t> iovs(iovs_len);
uvwasi_errno_t err;
err = uvwasi_serdes_readv_iovec_t(memory,
mem_size,
iovs_ptr,
iovs.data(),
iovs_len);
if (err != UVWASI_ESUCCESS) {
args.GetReturnValue().Set(err);
return;
}
uvwasi_size_t nread;
err = uvwasi_fd_read(&wasi->uvw_, fd, iovs.data(), iovs_len, &nread);
if (err == UVWASI_ESUCCESS)
uvwasi_serdes_write_size_t(memory, nread_ptr, nread);
args.GetReturnValue().Set(err);
}
void WASI::FdReaddir(const FunctionCallbackInfo<Value>& args) {
WASI* wasi;
uint32_t fd;
uint32_t buf_ptr;
uint32_t buf_len;
uint64_t cookie;
uint32_t bufused_ptr;
char* memory;
size_t mem_size;
RETURN_IF_BAD_ARG_COUNT(args, 5);
CHECK_TO_TYPE_OR_RETURN(args, args[0], Uint32, fd);
CHECK_TO_TYPE_OR_RETURN(args, args[1], Uint32, buf_ptr);
CHECK_TO_TYPE_OR_RETURN(args, args[2], Uint32, buf_len);
UNWRAP_BIGINT_OR_RETURN(args, args[3], Uint64, cookie);
CHECK_TO_TYPE_OR_RETURN(args, args[4], Uint32, bufused_ptr);
ASSIGN_INITIALIZED_OR_RETURN_UNWRAP(&wasi, args.This());
Debug(wasi,
"uvwasi_fd_readdir(%d, %d, %d, %d, %d)\n",
fd,
buf_ptr,
buf_len,
cookie,
bufused_ptr);
GET_BACKING_STORE_OR_RETURN(wasi, args, &memory, &mem_size);
CHECK_BOUNDS_OR_RETURN(args, mem_size, buf_ptr, buf_len);
CHECK_BOUNDS_OR_RETURN(args,
mem_size,
bufused_ptr,
UVWASI_SERDES_SIZE_size_t);
uvwasi_size_t bufused;
uvwasi_errno_t err = uvwasi_fd_readdir(&wasi->uvw_,
fd,
&memory[buf_ptr],
buf_len,
cookie,
&bufused);
if (err == UVWASI_ESUCCESS)
uvwasi_serdes_write_size_t(memory, bufused_ptr, bufused);
args.GetReturnValue().Set(err);
}
void WASI::FdRenumber(const FunctionCallbackInfo<Value>& args) {
WASI* wasi;
uint32_t from;
uint32_t to;
RETURN_IF_BAD_ARG_COUNT(args, 2);
CHECK_TO_TYPE_OR_RETURN(args, args[0], Uint32, from);
CHECK_TO_TYPE_OR_RETURN(args, args[1], Uint32, to);
ASSIGN_INITIALIZED_OR_RETURN_UNWRAP(&wasi, args.This());
Debug(wasi, "fd_renumber(%d, %d)\n", from, to);
uvwasi_errno_t err = uvwasi_fd_renumber(&wasi->uvw_, from, to);
args.GetReturnValue().Set(err);
}
uint32_t WASI::FdSeek(WASI& wasi,
WasmMemory memory,
uint32_t fd,
int64_t offset,
uint32_t whence,
uint32_t newoffset_ptr) {
Debug(&wasi, "fd_seek(%d, %d, %d, %d)\n", fd, offset, whence, newoffset_ptr);
CHECK_BOUNDS_OR_RETURN2(
memory.size, newoffset_ptr, UVWASI_SERDES_SIZE_filesize_t);
uvwasi_filesize_t newoffset;
uvwasi_errno_t err =
uvwasi_fd_seek(&wasi.uvw_, fd, offset, whence, &newoffset);
if (err == UVWASI_ESUCCESS)
uvwasi_serdes_write_filesize_t(memory.data, newoffset_ptr, newoffset);
return err;
}
void WASI::FdSync(const FunctionCallbackInfo<Value>& args) {
WASI* wasi;
uint32_t fd;
RETURN_IF_BAD_ARG_COUNT(args, 1);
CHECK_TO_TYPE_OR_RETURN(args, args[0], Uint32, fd);
ASSIGN_INITIALIZED_OR_RETURN_UNWRAP(&wasi, args.This());
Debug(wasi, "fd_sync(%d)\n", fd);
uvwasi_errno_t err = uvwasi_fd_sync(&wasi->uvw_, fd);
args.GetReturnValue().Set(err);
}
void WASI::FdTell(const FunctionCallbackInfo<Value>& args) {
WASI* wasi;
uint32_t fd;
uint32_t offset_ptr;
char* memory;
size_t mem_size;
RETURN_IF_BAD_ARG_COUNT(args, 2);
CHECK_TO_TYPE_OR_RETURN(args, args[0], Uint32, fd);
CHECK_TO_TYPE_OR_RETURN(args, args[1], Uint32, offset_ptr);
ASSIGN_INITIALIZED_OR_RETURN_UNWRAP(&wasi, args.This());
Debug(wasi, "fd_tell(%d, %d)\n", fd, offset_ptr);
GET_BACKING_STORE_OR_RETURN(wasi, args, &memory, &mem_size);
CHECK_BOUNDS_OR_RETURN(args,
mem_size,
offset_ptr,
UVWASI_SERDES_SIZE_filesize_t);
uvwasi_filesize_t offset;
uvwasi_errno_t err = uvwasi_fd_tell(&wasi->uvw_, fd, &offset);
if (err == UVWASI_ESUCCESS)
uvwasi_serdes_write_filesize_t(memory, offset_ptr, offset);
args.GetReturnValue().Set(err);
}
void WASI::FdWrite(const FunctionCallbackInfo<Value>& args) {
WASI* wasi;
uint32_t fd;
uint32_t iovs_ptr;
uint32_t iovs_len;
uint32_t nwritten_ptr;
char* memory;
size_t mem_size;
RETURN_IF_BAD_ARG_COUNT(args, 4);
CHECK_TO_TYPE_OR_RETURN(args, args[0], Uint32, fd);
CHECK_TO_TYPE_OR_RETURN(args, args[1], Uint32, iovs_ptr);
CHECK_TO_TYPE_OR_RETURN(args, args[2], Uint32, iovs_len);
CHECK_TO_TYPE_OR_RETURN(args, args[3], Uint32, nwritten_ptr);
ASSIGN_INITIALIZED_OR_RETURN_UNWRAP(&wasi, args.This());
Debug(wasi,
"fd_write(%d, %d, %d, %d)\n",
fd,
iovs_ptr,
iovs_len,
nwritten_ptr);
GET_BACKING_STORE_OR_RETURN(wasi, args, &memory, &mem_size);
CHECK_BOUNDS_OR_RETURN(args,
mem_size,
iovs_ptr,
iovs_len * UVWASI_SERDES_SIZE_ciovec_t);
CHECK_BOUNDS_OR_RETURN(args,
mem_size,
nwritten_ptr,
UVWASI_SERDES_SIZE_size_t);
std::vector<uvwasi_ciovec_t> iovs(iovs_len);
uvwasi_errno_t err;
err = uvwasi_serdes_readv_ciovec_t(memory,
mem_size,
iovs_ptr,
iovs.data(),
iovs_len);
if (err != UVWASI_ESUCCESS) {
args.GetReturnValue().Set(err);
return;
}
uvwasi_size_t nwritten;
err = uvwasi_fd_write(&wasi->uvw_, fd, iovs.data(), iovs_len, &nwritten);
if (err == UVWASI_ESUCCESS)
uvwasi_serdes_write_size_t(memory, nwritten_ptr, nwritten);
args.GetReturnValue().Set(err);
}
void WASI::PathCreateDirectory(const FunctionCallbackInfo<Value>& args) {
WASI* wasi;
uint32_t fd;
uint32_t path_ptr;
uint32_t path_len;
char* memory;
size_t mem_size;
RETURN_IF_BAD_ARG_COUNT(args, 3);
CHECK_TO_TYPE_OR_RETURN(args, args[0], Uint32, fd);
CHECK_TO_TYPE_OR_RETURN(args, args[1], Uint32, path_ptr);
CHECK_TO_TYPE_OR_RETURN(args, args[2], Uint32, path_len);
ASSIGN_INITIALIZED_OR_RETURN_UNWRAP(&wasi, args.This());
Debug(wasi, "path_create_directory(%d, %d, %d)\n", fd, path_ptr, path_len);
GET_BACKING_STORE_OR_RETURN(wasi, args, &memory, &mem_size);
CHECK_BOUNDS_OR_RETURN(args, mem_size, path_ptr, path_len);
uvwasi_errno_t err = uvwasi_path_create_directory(&wasi->uvw_,
fd,
&memory[path_ptr],
path_len);
args.GetReturnValue().Set(err);
}
void WASI::PathFilestatGet(const FunctionCallbackInfo<Value>& args) {
WASI* wasi;
uint32_t fd;
uint32_t flags;
uint32_t path_ptr;
uint32_t path_len;
uint32_t buf_ptr;
char* memory;
size_t mem_size;
RETURN_IF_BAD_ARG_COUNT(args, 5);
CHECK_TO_TYPE_OR_RETURN(args, args[0], Uint32, fd);
CHECK_TO_TYPE_OR_RETURN(args, args[1], Uint32, flags);
CHECK_TO_TYPE_OR_RETURN(args, args[2], Uint32, path_ptr);
CHECK_TO_TYPE_OR_RETURN(args, args[3], Uint32, path_len);
CHECK_TO_TYPE_OR_RETURN(args, args[4], Uint32, buf_ptr);
ASSIGN_INITIALIZED_OR_RETURN_UNWRAP(&wasi, args.This());
Debug(wasi,
"path_filestat_get(%d, %d, %d)\n",
fd,
path_ptr,
path_len);
GET_BACKING_STORE_OR_RETURN(wasi, args, &memory, &mem_size);
CHECK_BOUNDS_OR_RETURN(args, mem_size, path_ptr, path_len);
CHECK_BOUNDS_OR_RETURN(args,
mem_size,
buf_ptr,
UVWASI_SERDES_SIZE_filestat_t);
uvwasi_filestat_t stats;
uvwasi_errno_t err = uvwasi_path_filestat_get(&wasi->uvw_,