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just.cc
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#include "just.h"
just::inspector::InspectorClient* client;
static just::InitModulesCallback initModules;
// from here: https://raw.githubusercontent.com/fho/code_snippets/master/c/getusage.c
struct pstat {
long unsigned int utime_ticks;
long int cutime_ticks;
long unsigned int stime_ticks;
long int cstime_ticks;
long unsigned int vsize; // virtual memory size in bytes
long unsigned int rss; //Resident Set Size in bytes
long unsigned int cpu_total_time;
};
/*
* read /proc data into the passed struct pstat
* returns 0 on success, -1 on error
*/
int get_usage(const pid_t pid, struct pstat* result) {
//convert pid to string
char pid_s[20];
snprintf(pid_s, sizeof(pid_s), "%d", pid);
char stat_filepath[30] = "/proc/"; strncat(stat_filepath, pid_s,
sizeof(stat_filepath) - strlen(stat_filepath) -1);
strncat(stat_filepath, "/stat", sizeof(stat_filepath) -
strlen(stat_filepath) -1);
FILE *fpstat = fopen(stat_filepath, "r");
if (fpstat == NULL) {
perror("FOPEN ERROR ");
return -1;
}
FILE *fstat = fopen("/proc/stat", "r");
if (fstat == NULL) {
perror("FOPEN ERROR ");
fclose(fstat);
return -1;
}
//read values from /proc/pid/stat
bzero(result, sizeof(struct pstat));
long int rss;
if (fscanf(fpstat, "%*d %*s %*c %*d %*d %*d %*d %*d %*u %*u %*u %*u %*u %lu"
"%lu %ld %ld %*d %*d %*d %*d %*u %lu %ld",
&result->utime_ticks, &result->stime_ticks,
&result->cutime_ticks, &result->cstime_ticks, &result->vsize,
&rss) == EOF) {
fclose(fpstat);
return -1;
}
fclose(fpstat);
result->rss = rss * getpagesize();
//read+calc cpu total time from /proc/stat
long unsigned int cpu_time[10];
bzero(cpu_time, sizeof(cpu_time));
if (fscanf(fstat, "%*s %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu",
&cpu_time[0], &cpu_time[1], &cpu_time[2], &cpu_time[3],
&cpu_time[4], &cpu_time[5], &cpu_time[6], &cpu_time[7],
&cpu_time[8], &cpu_time[9]) == EOF) {
fclose(fstat);
return -1;
}
fclose(fstat);
for(int i=0; i < 10;i++)
result->cpu_total_time += cpu_time[i];
return 0;
}
void just::just_builtins_add(const char* name, const char* source,
unsigned int size) {
struct builtin* b = new builtin();
b->size = size;
b->source = source;
builtins[name] = b;
}
ssize_t just::process_memory_usage() {
char buf[1024];
const char* s = NULL;
ssize_t n = 0;
long val = 0;
int fd = 0;
int i = 0;
do {
fd = open("/proc/thread-self/stat", O_RDONLY);
} while (fd == -1 && errno == EINTR);
if (fd == -1) return (ssize_t)errno;
do
n = read(fd, buf, sizeof(buf) - 1);
while (n == -1 && errno == EINTR);
close(fd);
if (n == -1)
return (ssize_t)errno;
buf[n] = '\0';
s = strchr(buf, ' ');
if (s == NULL)
goto err;
s += 1;
if (*s != '(')
goto err;
s = strchr(s, ')');
if (s == NULL)
goto err;
for (i = 1; i <= 22; i++) {
s = strchr(s + 1, ' ');
if (s == NULL)
goto err;
}
errno = 0;
val = strtol(s, NULL, 10);
if (errno != 0)
goto err;
if (val < 0)
goto err;
return val * getpagesize();
err:
return 0;
}
uint64_t just::hrtime() {
struct timespec t;
clock_t clock_id = CLOCK_MONOTONIC;
if (clock_gettime(clock_id, &t))
return 0;
return t.tv_sec * (uint64_t) 1e9 + t.tv_nsec;
}
void just::SET_METHOD(Isolate *isolate, Local<ObjectTemplate>
recv, const char *name, FunctionCallback callback) {
recv->Set(String::NewFromUtf8(isolate, name,
NewStringType::kNormal).ToLocalChecked(),
FunctionTemplate::New(isolate, callback));
}
void just::SET_MODULE(Isolate *isolate, Local<ObjectTemplate>
recv, const char *name, Local<ObjectTemplate> module) {
recv->Set(String::NewFromUtf8(isolate, name,
NewStringType::kNormal).ToLocalChecked(),
module);
}
void just::SET_VALUE(Isolate *isolate, Local<ObjectTemplate>
recv, const char *name, Local<Value> value) {
recv->Set(String::NewFromUtf8(isolate, name,
NewStringType::kNormal).ToLocalChecked(),
value);
}
void just::PrintStackTrace(Isolate* isolate, const TryCatch& try_catch) {
HandleScope handleScope(isolate);
Local<Value> exception = try_catch.Exception();
Local<Message> message = try_catch.Message();
Local<StackTrace> stack = message->GetStackTrace();
String::Utf8Value ex(isolate, exception);
Local<Value> scriptName = message->GetScriptResourceName();
String::Utf8Value scriptname(isolate, scriptName);
Local<Context> context = isolate->GetCurrentContext();
int linenum = message->GetLineNumber(context).FromJust();
fprintf(stderr, "%s in %s on line %i\n", *ex, *scriptname, linenum);
if (stack.IsEmpty()) return;
for (int i = 0; i < stack->GetFrameCount(); i++) {
Local<StackFrame> stack_frame = stack->GetFrame(isolate, i);
Local<String> functionName = stack_frame->GetFunctionName();
Local<String> scriptName = stack_frame->GetScriptName();
String::Utf8Value fn_name_s(isolate, functionName);
String::Utf8Value script_name(isolate, scriptName);
const int line_number = stack_frame->GetLineNumber();
const int column = stack_frame->GetColumn();
if (stack_frame->IsEval()) {
if (stack_frame->GetScriptId() == Message::kNoScriptIdInfo) {
fprintf(stderr, " at [eval]:%i:%i\n", line_number, column);
} else {
fprintf(stderr, " at [eval] (%s:%i:%i)\n", *script_name,
line_number, column);
}
break;
}
if (fn_name_s.length() == 0) {
fprintf(stderr, " at %s:%i:%i\n", *script_name, line_number, column);
} else {
fprintf(stderr, " at %s (%s:%i:%i)\n", *fn_name_s, *script_name,
line_number, column);
}
}
fflush(stderr);
}
void just::Print(const FunctionCallbackInfo<Value> &args) {
Isolate *isolate = args.GetIsolate();
HandleScope handleScope(isolate);
if (args[0].IsEmpty()) return;
String::Utf8Value str(args.GetIsolate(), args[0]);
int endline = 1;
if (args.Length() > 1) {
endline = static_cast<int>(args[1]->BooleanValue(isolate));
}
const char *cstr = *str;
if (endline == 1) {
fprintf(stdout, "%s\n", cstr);
} else {
fprintf(stdout, "%s", cstr);
}
}
void just::Error(const FunctionCallbackInfo<Value> &args) {
Isolate *isolate = args.GetIsolate();
HandleScope handleScope(isolate);
if (args[0].IsEmpty()) return;
String::Utf8Value str(args.GetIsolate(), args[0]);
int endline = 1;
if (args.Length() > 1) {
endline = static_cast<int>(args[1]->BooleanValue(isolate));
}
const char *cstr = *str;
if (endline == 1) {
fprintf(stderr, "%s\n", cstr);
} else {
fprintf(stderr, "%s", cstr);
}
}
v8::Local<v8::String> just::ReadFile(Isolate *isolate, const char *name) {
FILE *file = fopen(name, "rb");
if (file == NULL) {
isolate->ThrowException(Exception::Error(
String::NewFromUtf8Literal(isolate,
"Bad File", NewStringType::kNormal)));
return Local<String>();
}
fseek(file, 0, SEEK_END);
size_t size = ftell(file);
rewind(file);
char* chars = (char*)calloc(1, size + 1);
chars[size] = '\0';
for (size_t i = 0; i < size;) {
i += fread(&chars[i], 1, size - i, file);
if (ferror(file)) {
fclose(file);
isolate->ThrowException(Exception::Error(String::NewFromUtf8(isolate,
"Read Error", NewStringType::kNormal).ToLocalChecked()));
return Local<String>();
}
}
fclose(file);
Local<String> result = String::NewFromUtf8(isolate, chars,
NewStringType::kNormal, static_cast<int>(size)).ToLocalChecked();
free(chars);
return result;
}
v8::MaybeLocal<v8::Module> just::OnModuleInstantiate(Local<Context> context,
Local<String> specifier, Local<Module> referrer) {
HandleScope handle_scope(context->GetIsolate());
return MaybeLocal<Module>();
}
void just::vm::CompileScript(const FunctionCallbackInfo<Value> &args) {
Isolate *isolate = args.GetIsolate();
HandleScope handleScope(isolate);
Local<Context> context = isolate->GetCurrentContext();
TryCatch try_catch(isolate);
Local<String> source = args[0].As<String>();
Local<String> path = args[1].As<String>();
Local<Array> params_buf = args[2].As<Array>();
Local<Array> context_extensions_buf;
context_extensions_buf = args[3].As<Array>();
std::vector<Local<String>> params;
if (!params_buf.IsEmpty()) {
for (uint32_t n = 0; n < params_buf->Length(); n++) {
Local<Value> val;
if (!params_buf->Get(context, n).ToLocal(&val)) return;
params.push_back(val.As<String>());
}
}
std::vector<Local<Object>> context_extensions;
if (!context_extensions_buf.IsEmpty()) {
for (uint32_t n = 0; n < context_extensions_buf->Length(); n++) {
Local<Value> val;
if (!context_extensions_buf->Get(context, n).ToLocal(&val)) return;
context_extensions.push_back(val.As<Object>());
}
}
ScriptOrigin baseorigin(path, // resource name
Integer::New(isolate, 0), // line offset
Integer::New(isolate, 0), // column offset
True(isolate));
Context::Scope scope(context);
ScriptCompiler::Source basescript(source, baseorigin);
MaybeLocal<Function> maybe_fn = ScriptCompiler::CompileFunctionInContext(
context, &basescript, params.size(), params.data(), 0, nullptr,
ScriptCompiler::kEagerCompile);
if (maybe_fn.IsEmpty()) {
if (try_catch.HasCaught() && !try_catch.HasTerminated()) {
try_catch.ReThrow();
}
return;
}
Local<Function> fn = maybe_fn.ToLocalChecked();
args.GetReturnValue().Set(fn);
}
void just::vm::RunModule(const FunctionCallbackInfo<Value> &args) {
Isolate *isolate = args.GetIsolate();
HandleScope handleScope(isolate);
Local<Context> context = isolate->GetCurrentContext();
TryCatch try_catch(isolate);
Local<String> source = args[0].As<String>();
Local<String> path = args[1].As<String>();
ScriptOrigin baseorigin(path, // resource name
Integer::New(isolate, 0), // line offset
Integer::New(isolate, 0), // column offset
False(isolate), // is shared cross-origin
Local<Integer>(), // script id
Local<Value>(), // source map url
False(isolate), // is opaque
False(isolate), // is wasm
True(isolate)); // is module
ScriptCompiler::Source basescript(source, baseorigin);
Local<Module> module;
bool ok = ScriptCompiler::CompileModule(isolate,
&basescript).ToLocal(&module);
if (!ok) {
if (try_catch.HasCaught() && !try_catch.HasTerminated()) {
try_catch.ReThrow();
}
return;
}
Maybe<bool> ok2 = module->InstantiateModule(context, OnModuleInstantiate);
if (ok2.IsNothing()) {
if (try_catch.HasCaught() && !try_catch.HasTerminated()) {
try_catch.ReThrow();
}
return;
}
MaybeLocal<Value> result = module->Evaluate(context);
if (try_catch.HasCaught() && !try_catch.HasTerminated()) {
try_catch.ReThrow();
return;
}
args.GetReturnValue().Set(result.ToLocalChecked());
}
void just::vm::Builtin(const FunctionCallbackInfo<Value> &args) {
Isolate *isolate = args.GetIsolate();
HandleScope handleScope(isolate);
String::Utf8Value name(isolate, args[0]);
builtin* b = builtins[*name];
if (b == nullptr) {
args.GetReturnValue().Set(Null(isolate));
return;
}
args.GetReturnValue().Set(String::NewFromUtf8(isolate, b->source,
NewStringType::kNormal, b->size).ToLocalChecked());
}
void just::vm::RunScript(const FunctionCallbackInfo<Value> &args) {
Isolate *isolate = args.GetIsolate();
HandleScope handleScope(isolate);
Local<Context> context = isolate->GetCurrentContext();
TryCatch try_catch(isolate);
Local<String> source = args[0].As<String>();
Local<String> path = args[1].As<String>();
ScriptOrigin baseorigin(path, // resource name
Integer::New(isolate, 0), // line offset
Integer::New(isolate, 0), // column offset
False(isolate), // is shared cross-origin
Local<Integer>(), // script id
Local<Value>(), // source map url
False(isolate), // is opaque
False(isolate), // is wasm
False(isolate)); // is module
Local<Script> script;
ScriptCompiler::Source basescript(source, baseorigin);
bool ok = ScriptCompiler::Compile(context, &basescript).ToLocal(&script);
if (!ok) {
if (try_catch.HasCaught() && !try_catch.HasTerminated()) {
try_catch.ReThrow();
}
return;
}
MaybeLocal<Value> result = script->Run(context);
if (try_catch.HasCaught() && !try_catch.HasTerminated()) {
try_catch.ReThrow();
return;
}
args.GetReturnValue().Set(result.ToLocalChecked());
}
void just::vm::Init(Isolate* isolate, Local<ObjectTemplate> target) {
Local<ObjectTemplate> vm = ObjectTemplate::New(isolate);
SET_METHOD(isolate, vm, "compile", just::vm::CompileScript);
SET_METHOD(isolate, vm, "runModule", just::vm::RunModule);
SET_METHOD(isolate, vm, "runScript", just::vm::RunScript);
SET_METHOD(isolate, vm, "builtin", just::vm::Builtin);
SET_MODULE(isolate, target, "vm", vm);
}
void just::sys::WaitPID(const FunctionCallbackInfo<Value> &args) {
Isolate *isolate = args.GetIsolate();
HandleScope handleScope(isolate);
Local<Context> context = isolate->GetCurrentContext();
Local<ArrayBuffer> ab = args[0].As<Int32Array>()->Buffer();
std::shared_ptr<BackingStore> backing = ab->GetBackingStore();
int *fields = static_cast<int *>(backing->Data());
int pid = -1;
if (args.Length() > 1) {
pid = args[1]->IntegerValue(context).ToChecked();
}
fields[1] = waitpid(pid, &fields[0], WNOHANG);
fields[0] = WEXITSTATUS(fields[0]);
args.GetReturnValue().Set(args[0]);
}
void just::sys::Spawn(const FunctionCallbackInfo<Value> &args) {
Isolate *isolate = args.GetIsolate();
HandleScope handleScope(isolate);
Local<Context> context = isolate->GetCurrentContext();
String::Utf8Value filePath(isolate, args[0]);
String::Utf8Value cwd(isolate, args[1]);
Local<Array> arguments = args[2].As<Array>();
int fds[3];
fds[0] = args[3]->IntegerValue(context).ToChecked();
fds[1] = args[4]->IntegerValue(context).ToChecked();
fds[2] = args[5]->IntegerValue(context).ToChecked();
int len = arguments->Length();
char** argv = (char**)calloc(len + 2, sizeof(char*));
//char* argv[len + 2];
int written = 0;
argv[0] = (char*)calloc(1, filePath.length());
memcpy(argv[0], *filePath, filePath.length());
for (int i = 0; i < len; i++) {
Local<String> val =
arguments->Get(context, i).ToLocalChecked().As<v8::String>();
argv[i + 1] = (char*)calloc(1, val->Length());
val->WriteUtf8(isolate, argv[i + 1], val->Length(), &written,
v8::String::HINT_MANY_WRITES_EXPECTED | v8::String::NO_NULL_TERMINATION);
}
argv[len + 1] = NULL;
pid_t pid = fork();
if (pid == -1) {
perror("error forking");
args.GetReturnValue().Set(Integer::New(isolate, pid));
for (int i = 0; i < len; i++) {
free(argv[i]);
}
free(argv);
return;
}
if (pid == 0) {
close(0);
close(1);
close(2);
dup2(fds[0], 0);
dup2(fds[1], 1);
dup2(fds[2], 2);
int r = chdir(*cwd);
if (r < 0) {
fprintf(stderr, "error changing directory\n");
exit(127);
}
execvp(*filePath, argv);
perror("error launching child process");
for (int i = 0; i < len; i++) {
free(argv[i]);
}
free(argv);
exit(127);
} else {
close(fds[0]);
close(fds[1]);
close(fds[2]);
args.GetReturnValue().Set(Integer::New(isolate, pid));
for (int i = 0; i < len; i++) {
free(argv[i]);
}
free(argv);
return;
}
}
void just::sys::HRTime(const FunctionCallbackInfo<Value> &args) {
Isolate *isolate = args.GetIsolate();
HandleScope handleScope(isolate);
Local<BigUint64Array> b64 = args[0].As<BigUint64Array>();
Local<ArrayBuffer> ab = b64->Buffer();
std::shared_ptr<BackingStore> backing = ab->GetBackingStore();
uint64_t *fields = static_cast<uint64_t *>(backing->Data());
fields[0] = hrtime();
args.GetReturnValue().Set(b64);
}
void just::sys::RunMicroTasks(const FunctionCallbackInfo<Value> &args) {
Isolate *isolate = args.GetIsolate();
HandleScope handleScope(isolate);
isolate->PerformMicrotaskCheckpoint();
//MicrotasksScope::PerformCheckpoint(isolate);
}
void just::sys::EnqueueMicrotask(const FunctionCallbackInfo<Value>& args) {
Isolate *isolate = args.GetIsolate();
HandleScope handleScope(isolate);
isolate->EnqueueMicrotask(args[0].As<Function>());
}
void just::sys::Exit(const FunctionCallbackInfo<Value>& args) {
Isolate *isolate = args.GetIsolate();
HandleScope handleScope(isolate);
Local<Context> context = isolate->GetCurrentContext();
int status = args[0]->Int32Value(context).ToChecked();
exit(status);
}
void just::sys::Kill(const FunctionCallbackInfo<Value>& args) {
Isolate *isolate = args.GetIsolate();
HandleScope handleScope(isolate);
Local<Context> context = isolate->GetCurrentContext();
int pid = args[0]->Int32Value(context).ToChecked();
int signum = args[1]->Int32Value(context).ToChecked();
args.GetReturnValue().Set(Integer::New(isolate, kill(pid, signum)));
}
//TODO: CPU Info:
/*
https://github.com/nodejs/node/blob/4438852aa16689b841e5ffbca4a24fc36a0fe33c/src/node_os.cc#L101
https://github.com/libuv/libuv/blob/c70dd705bc2adc488ddffcdc12f0c610d116e77b/src/unix/linux-core.c#L610
*/
void just::sys::CPUUsage(const FunctionCallbackInfo<Value> &args) {
Isolate *isolate = args.GetIsolate();
HandleScope handleScope(isolate);
struct tms stat;
clock_t c = times(&stat);
args.GetReturnValue().Set(Integer::New(isolate, c));
if (c == -1) {
return;
}
Local<Uint32Array> b32 = args[0].As<Uint32Array>();
Local<ArrayBuffer> ab = b32->Buffer();
std::shared_ptr<BackingStore> backing = ab->GetBackingStore();
uint32_t *fields = static_cast<uint32_t *>(backing->Data());
fields[0] = stat.tms_utime;
fields[1] = stat.tms_stime;
fields[2] = stat.tms_cutime;
fields[3] = stat.tms_cstime;
}
void just::sys::GetrUsage(const FunctionCallbackInfo<Value> &args) {
Isolate *isolate = args.GetIsolate();
HandleScope handleScope(isolate);
struct rusage usage;
// todo: can use RUSAGE_THREAD to get thread (self) usage
getrusage(RUSAGE_SELF, &usage);
Local<Float64Array> array = args[0].As<Float64Array>();
Local<ArrayBuffer> ab = array->Buffer();
std::shared_ptr<BackingStore> backing = ab->GetBackingStore();
double *fields = static_cast<double *>(backing->Data());
fields[0] = (JUST_MICROS_PER_SEC * usage.ru_utime.tv_sec)
+ usage.ru_utime.tv_usec;
fields[1] = (JUST_MICROS_PER_SEC * usage.ru_stime.tv_sec)
+ usage.ru_stime.tv_usec;
fields[2] = usage.ru_maxrss;
fields[3] = usage.ru_ixrss;
fields[4] = usage.ru_idrss;
fields[5] = usage.ru_isrss;
fields[6] = usage.ru_minflt;
fields[7] = usage.ru_majflt;
fields[8] = usage.ru_nswap;
fields[9] = usage.ru_inblock;
fields[10] = usage.ru_oublock;
fields[11] = usage.ru_msgsnd;
fields[12] = usage.ru_msgrcv;
fields[13] = usage.ru_nsignals;
fields[14] = usage.ru_nvcsw;
fields[15] = usage.ru_nivcsw;
}
void just::sys::PID(const FunctionCallbackInfo<Value> &args) {
Isolate *isolate = args.GetIsolate();
HandleScope handleScope(isolate);
args.GetReturnValue().Set(Integer::New(isolate, getpid()));
}
void just::sys::Errno(const FunctionCallbackInfo<Value> &args) {
Isolate *isolate = args.GetIsolate();
HandleScope handleScope(isolate);
args.GetReturnValue().Set(Integer::New(isolate, errno));
}
void just::sys::StrError(const FunctionCallbackInfo<Value> &args) {
Isolate *isolate = args.GetIsolate();
HandleScope handleScope(isolate);
Local<Context> context = isolate->GetCurrentContext();
int err = args[0]->IntegerValue(context).ToChecked();
args.GetReturnValue().Set(String::NewFromUtf8(isolate,
strerror(err)).ToLocalChecked());
}
void just::sys::Sleep(const FunctionCallbackInfo<Value> &args) {
Isolate *isolate = args.GetIsolate();
HandleScope handleScope(isolate);
Local<Context> context = isolate->GetCurrentContext();
int seconds = args[0]->IntegerValue(context).ToChecked();
sleep(seconds);
}
void just::sys::USleep(const FunctionCallbackInfo<Value> &args) {
Isolate *isolate = args.GetIsolate();
HandleScope handleScope(isolate);
Local<Context> context = isolate->GetCurrentContext();
int microseconds = args[0]->IntegerValue(context).ToChecked();
usleep(microseconds);
}
void just::sys::NanoSleep(const FunctionCallbackInfo<Value> &args) {
Isolate *isolate = args.GetIsolate();
HandleScope handleScope(isolate);
Local<Context> context = isolate->GetCurrentContext();
int seconds = args[0]->IntegerValue(context).ToChecked();
int nanoseconds = args[1]->IntegerValue(context).ToChecked();
struct timespec sleepfor;
sleepfor.tv_sec = seconds;
sleepfor.tv_nsec = nanoseconds;
nanosleep(&sleepfor, NULL);
}
void just::sys::MemoryUsage(const FunctionCallbackInfo<Value> &args) {
Isolate *isolate = args.GetIsolate();
HandleScope handleScope(isolate);
ssize_t rss = process_memory_usage();
HeapStatistics v8_heap_stats;
isolate->GetHeapStatistics(&v8_heap_stats);
Local<Float64Array> array = args[0].As<Float64Array>();
Local<ArrayBuffer> ab = array->Buffer();
std::shared_ptr<BackingStore> backing = ab->GetBackingStore();
double *fields = static_cast<double *>(backing->Data());
fields[0] = rss;
fields[1] = v8_heap_stats.total_heap_size();
fields[2] = v8_heap_stats.used_heap_size();
fields[3] = v8_heap_stats.external_memory();
fields[4] = v8_heap_stats.does_zap_garbage();
fields[5] = v8_heap_stats.heap_size_limit();
fields[6] = v8_heap_stats.malloced_memory();
fields[7] = v8_heap_stats.number_of_detached_contexts();
fields[8] = v8_heap_stats.number_of_native_contexts();
fields[9] = v8_heap_stats.peak_malloced_memory();
fields[10] = v8_heap_stats.total_available_size();
fields[11] = v8_heap_stats.total_heap_size_executable();
fields[12] = v8_heap_stats.total_physical_size();
fields[13] = isolate->AdjustAmountOfExternalAllocatedMemory(0);
args.GetReturnValue().Set(array);
}
void just::sys::SharedMemoryUsage(const FunctionCallbackInfo<Value> &args) {
Isolate *isolate = args.GetIsolate();
HandleScope handleScope(isolate);
Local<Context> context = isolate->GetCurrentContext();
v8::SharedMemoryStatistics sm_stats;
v8::V8::GetSharedMemoryStatistics(&sm_stats);
Local<Object> o = Object::New(isolate);
o->Set(context, String::NewFromUtf8Literal(isolate, "readOnlySpaceSize",
NewStringType::kNormal),
Integer::New(isolate, sm_stats.read_only_space_size())).Check();
o->Set(context, String::NewFromUtf8Literal(isolate, "readOnlySpaceUsedSize",
NewStringType::kNormal),
Integer::New(isolate, sm_stats.read_only_space_used_size())).Check();
o->Set(context, String::NewFromUtf8Literal(isolate,
"readOnlySpacePhysicalSize",
NewStringType::kNormal),
Integer::New(isolate, sm_stats.read_only_space_physical_size())).Check();
args.GetReturnValue().Set(o);
}
void just::sys::HeapObjectStatistics(const FunctionCallbackInfo<Value> &args) {
Isolate *isolate = args.GetIsolate();
HandleScope handleScope(isolate);
Local<Context> context = isolate->GetCurrentContext();
v8::HeapObjectStatistics obj_stats;
size_t num_types = isolate->NumberOfTrackedHeapObjectTypes();
Local<Object> res = Object::New(isolate);
for (size_t i = 0; i < num_types; i++) {
bool ok = isolate->GetHeapObjectStatisticsAtLastGC(&obj_stats, i);
if (ok) {
Local<Object> o = Object::New(isolate);
o->Set(context, String::NewFromUtf8Literal(isolate, "subType",
NewStringType::kNormal),
String::NewFromUtf8(isolate, obj_stats.object_sub_type(),
NewStringType::kNormal).ToLocalChecked()).Check();
o->Set(context, String::NewFromUtf8Literal(isolate, "count",
NewStringType::kNormal),
Integer::New(isolate, obj_stats.object_count())).Check();
o->Set(context, String::NewFromUtf8Literal(isolate, "size",
NewStringType::kNormal),
Integer::New(isolate, obj_stats.object_size())).Check();
res->Set(context,
String::NewFromUtf8(isolate, obj_stats.object_type(),
NewStringType::kNormal).ToLocalChecked(),
o
).Check();
}
}
args.GetReturnValue().Set(res);
}
void just::sys::HeapCodeStatistics(const FunctionCallbackInfo<Value> &args) {
Isolate *isolate = args.GetIsolate();
HandleScope handleScope(isolate);
Local<Context> context = isolate->GetCurrentContext();
v8::HeapCodeStatistics code_stats;
isolate->GetHeapCodeAndMetadataStatistics(&code_stats);
Local<Object> o = Object::New(isolate);
o->Set(context, String::NewFromUtf8Literal(isolate, "codeAndMetadataSize",
NewStringType::kNormal),
Integer::New(isolate, code_stats.code_and_metadata_size())).Check();
o->Set(context, String::NewFromUtf8Literal(isolate, "bytecodeAndMetadataSize",
NewStringType::kNormal),
Integer::New(isolate, code_stats.bytecode_and_metadata_size())).Check();
o->Set(context, String::NewFromUtf8Literal(isolate, "externalScriptSourceSize",
NewStringType::kNormal),
Integer::New(isolate, code_stats.external_script_source_size())).Check();
args.GetReturnValue().Set(o);
}
void just::sys::HeapSpaceUsage(const FunctionCallbackInfo<Value> &args) {
Isolate *isolate = args.GetIsolate();
HandleScope handleScope(isolate);
Local<Context> context = isolate->GetCurrentContext();
HeapSpaceStatistics s;
size_t number_of_heap_spaces = isolate->NumberOfHeapSpaces();
Local<Array> spaces = args[0].As<Array>();
Local<Object> o = Object::New(isolate);
HeapStatistics v8_heap_stats;
isolate->GetHeapStatistics(&v8_heap_stats);
Local<Object> heaps = Object::New(isolate);
o->Set(context, String::NewFromUtf8Literal(isolate, "totalHeapSize",
NewStringType::kNormal),
Integer::New(isolate, v8_heap_stats.total_heap_size())).Check();
o->Set(context, String::NewFromUtf8Literal(isolate, "totalPhysicalSize",
NewStringType::kNormal),
Integer::New(isolate, v8_heap_stats.total_physical_size())).Check();
o->Set(context, String::NewFromUtf8Literal(isolate, "usedHeapSize",
NewStringType::kNormal),
Integer::New(isolate, v8_heap_stats.used_heap_size())).Check();
o->Set(context, String::NewFromUtf8Literal(isolate, "totalAvailableSize",
NewStringType::kNormal),
Integer::New(isolate, v8_heap_stats.total_available_size())).Check();
o->Set(context, String::NewFromUtf8Literal(isolate, "heapSizeLimit",
NewStringType::kNormal),
Integer::New(isolate, v8_heap_stats.heap_size_limit())).Check();
o->Set(context, String::NewFromUtf8Literal(isolate, "totalHeapSizeExecutable",
NewStringType::kNormal),
Integer::New(isolate, v8_heap_stats.total_heap_size_executable())).Check();
o->Set(context, String::NewFromUtf8Literal(isolate, "totalGlobalHandlesSize",
NewStringType::kNormal),
Integer::New(isolate, v8_heap_stats.total_global_handles_size())).Check();
o->Set(context, String::NewFromUtf8Literal(isolate, "usedGlobalHandlesSize",
NewStringType::kNormal),
Integer::New(isolate, v8_heap_stats.used_global_handles_size())).Check();
o->Set(context, String::NewFromUtf8Literal(isolate, "mallocedMemory",
NewStringType::kNormal),
Integer::New(isolate, v8_heap_stats.malloced_memory())).Check();
o->Set(context, String::NewFromUtf8Literal(isolate, "externalMemory",
NewStringType::kNormal),
Integer::New(isolate, v8_heap_stats.external_memory())).Check();
o->Set(context, String::NewFromUtf8Literal(isolate, "peakMallocedMemory",
NewStringType::kNormal),
Integer::New(isolate, v8_heap_stats.peak_malloced_memory())).Check();
o->Set(context, String::NewFromUtf8Literal(isolate, "nativeContexts",
NewStringType::kNormal),
Integer::New(isolate, v8_heap_stats.number_of_native_contexts())).Check();
o->Set(context, String::NewFromUtf8Literal(isolate, "detachedContexts",
NewStringType::kNormal),
Integer::New(isolate, v8_heap_stats.number_of_detached_contexts())).Check();
o->Set(context, String::NewFromUtf8Literal(isolate, "heapSpaces",
NewStringType::kNormal), heaps).Check();
for (size_t i = 0; i < number_of_heap_spaces; i++) {
isolate->GetHeapSpaceStatistics(&s, i);
Local<Float64Array> array = spaces->Get(context, i)
.ToLocalChecked().As<Float64Array>();
Local<ArrayBuffer> ab = array->Buffer();
std::shared_ptr<BackingStore> backing = ab->GetBackingStore();
double *fields = static_cast<double *>(backing->Data());
fields[0] = s.physical_space_size();
fields[1] = s.space_available_size();
fields[2] = s.space_size();
fields[3] = s.space_used_size();
heaps->Set(context, String::NewFromUtf8(isolate, s.space_name(),
NewStringType::kNormal).ToLocalChecked(), array).Check();
}
args.GetReturnValue().Set(o);
}
void just::sys::FreeMemory(void* buf, size_t length, void* data) {
fprintf(stderr, "free memory %lu. figure this out.\n", length);
//free(buf);
//free(data);
}
void just::sys::Memcpy(const FunctionCallbackInfo<Value> &args) {
Isolate *isolate = args.GetIsolate();
HandleScope handleScope(isolate);
Local<Context> context = isolate->GetCurrentContext();
Local<ArrayBuffer> abdest = args[0].As<ArrayBuffer>();
std::shared_ptr<BackingStore> bdest = abdest->GetBackingStore();
char *dest = static_cast<char *>(bdest->Data());
Local<ArrayBuffer> absource = args[1].As<ArrayBuffer>();
std::shared_ptr<BackingStore> bsource = absource->GetBackingStore();
char *source = static_cast<char *>(bsource->Data());
int slen = bsource->ByteLength();
int argc = args.Length();
int off = 0;
if (argc > 2) {
off = args[2]->Int32Value(context).ToChecked();
}
int len = slen;
if (argc > 3) {
len = args[3]->Int32Value(context).ToChecked();
}
int off2 = 0;
if (argc > 4) {
off2 = args[4]->Int32Value(context).ToChecked();
}
if (len == 0) return;
dest = dest + off;
source = source + off2;
memcpy(dest, source, len);
args.GetReturnValue().Set(Integer::New(isolate, len));
}
void just::sys::Utf8Length(const FunctionCallbackInfo<Value> &args) {
Isolate *isolate = args.GetIsolate();
HandleScope handleScope(isolate);
Local<String> str = args[0].As<String>();
args.GetReturnValue().Set(Integer::New(isolate, str->Utf8Length(isolate)));
}
void just::sys::Calloc(const FunctionCallbackInfo<Value> &args) {
Isolate *isolate = args.GetIsolate();
HandleScope handleScope(isolate);
Local<Context> context = isolate->GetCurrentContext();
uint32_t count = args[0]->Uint32Value(context).ToChecked();
uint32_t size = 0;
void* chunk;
if (args[1]->IsString()) {
Local<String> str = args[1].As<String>();
size = str->Utf8Length(isolate);
chunk = calloc(count, size);
int written;
char* next = (char*)chunk;
for (uint32_t i = 0; i < count; i++) {
str->WriteUtf8(isolate, next, size, &written,
String::HINT_MANY_WRITES_EXPECTED | String::NO_NULL_TERMINATION);
next += written;
}
} else {
size = args[1]->Uint32Value(context).ToChecked();
chunk = calloc(count, size);
}
bool shared = false;
if (args.Length() > 2) {
shared = args[2]->BooleanValue(isolate);
}
if (shared) {
std::unique_ptr<BackingStore> backing =
SharedArrayBuffer::NewBackingStore(chunk, count * size,
FreeMemory, nullptr);
Local<SharedArrayBuffer> ab =
SharedArrayBuffer::New(isolate, std::move(backing));
args.GetReturnValue().Set(ab);
} else {
std::unique_ptr<BackingStore> backing =
ArrayBuffer::NewBackingStore(chunk, count * size, FreeMemory, nullptr);
Local<ArrayBuffer> ab =
ArrayBuffer::New(isolate, std::move(backing));
args.GetReturnValue().Set(ab);
}
}
void just::sys::ReadString(const FunctionCallbackInfo<Value> &args) {
Isolate *isolate = args.GetIsolate();
HandleScope handleScope(isolate);
Local<Context> context = isolate->GetCurrentContext();
Local<ArrayBuffer> ab = args[0].As<ArrayBuffer>();
std::shared_ptr<BackingStore> backing = ab->GetBackingStore();
char *data = static_cast<char *>(backing->Data());
int len = backing->ByteLength();
int argc = args.Length();
if (argc > 1) {
len = args[1]->Int32Value(context).ToChecked();
}
int off = 0;
if (argc > 2) {
off = args[2]->Int32Value(context).ToChecked();
}
char* source = data + off;
args.GetReturnValue().Set(String::NewFromUtf8(isolate, source,
NewStringType::kNormal, len).ToLocalChecked());
}
void just::sys::GetAddress(const FunctionCallbackInfo<Value> &args) {
Isolate *isolate = args.GetIsolate();
HandleScope handleScope(isolate);
Local<ArrayBuffer> ab = args[0].As<ArrayBuffer>();
std::shared_ptr<BackingStore> backing = ab->GetBackingStore();
char *data = static_cast<char *>(backing->Data());
args.GetReturnValue().Set(BigInt::New(isolate, (uint64_t)data));
}
/*
void just::sys::GetStringAddress(const FunctionCallbackInfo<Value> &args) {
Isolate *isolate = args.GetIsolate();
HandleScope handleScope(isolate);
Local<String> str = args[0].As<String>();
args.GetReturnValue().Set(BigInt::New(isolate, (uint64_t)*str));
}
*/
void just::sys::WriteString(const FunctionCallbackInfo<Value> &args) {
Isolate *isolate = args.GetIsolate();
HandleScope handleScope(isolate);
Local<Context> context = isolate->GetCurrentContext();
Local<ArrayBuffer> ab = args[0].As<ArrayBuffer>();
Local<String> str = args[1].As<String>();
int off = 0;
if (args.Length() > 2) {
off = args[2]->Int32Value(context).ToChecked();
}
std::shared_ptr<BackingStore> backing = ab->GetBackingStore();
char *data = static_cast<char *>(backing->Data());
char* source = data + off;
int len = str->Utf8Length(isolate);
int nchars = 0;
int written = str->WriteUtf8(isolate, source, len, &nchars, v8::String::HINT_MANY_WRITES_EXPECTED | v8::String::NO_NULL_TERMINATION);
args.GetReturnValue().Set(Integer::New(isolate, written));
}
void just::sys::Fcntl(const FunctionCallbackInfo<Value> &args) {
Isolate *isolate = args.GetIsolate();
HandleScope handleScope(isolate);
Local<Context> context = isolate->GetCurrentContext();
int fd = args[0]->Int32Value(context).ToChecked();
int flags = args[1]->Int32Value(context).ToChecked();
if (args.Length() > 2) {
int val = args[2]->Int32Value(context).ToChecked();
args.GetReturnValue().Set(Integer::New(isolate, fcntl(fd, flags, val)));
return;
}
args.GetReturnValue().Set(Integer::New(isolate, fcntl(fd, flags)));
}
void just::sys::Cwd(const FunctionCallbackInfo<Value> &args) {
Isolate *isolate = args.GetIsolate();
HandleScope handleScope(isolate);
char cwd[PATH_MAX];
args.GetReturnValue().Set(String::NewFromUtf8(isolate, getcwd(cwd, PATH_MAX),
NewStringType::kNormal).ToLocalChecked());
}
void just::sys::Env(const FunctionCallbackInfo<Value> &args) {
Isolate *isolate = args.GetIsolate();
HandleScope handleScope(isolate);
Local<Context> context = isolate->GetCurrentContext();
int size = 0;
while (environ[size]) size++;
Local<Array> envarr = Array::New(isolate);
for (int i = 0; i < size; ++i) {
const char *var = environ[i];
envarr->Set(context, i, String::NewFromUtf8(isolate, var,
NewStringType::kNormal, strlen(var)).ToLocalChecked()).Check();
}
args.GetReturnValue().Set(envarr);
}
void just::sys::Timer(const FunctionCallbackInfo<Value> &args) {
Isolate *isolate = args.GetIsolate();
HandleScope handleScope(isolate);
Local<Context> context = isolate->GetCurrentContext();
int t1 = args[0]->Int32Value(context).ToChecked();
int t2 = args[1]->Int32Value(context).ToChecked();
int argc = args.Length();
clockid_t cid = CLOCK_MONOTONIC;
if (argc > 2) {
cid = (clockid_t)args[2]->Int32Value(context).ToChecked();
}
int flags = TFD_NONBLOCK | TFD_CLOEXEC;
if (argc > 3) {
flags = args[3]->Int32Value(context).ToChecked();
}
int fd = timerfd_create(cid, flags);
if (fd == -1) {
args.GetReturnValue().Set(Integer::New(isolate, fd));