Exception: MiniRacer::EvalError

Inherits:

Error

• Object
• StandardError
• Error
• MiniRacer::EvalError

Defined in:

lib/mini_racer.rb,
ext/mini_racer_extension/mini_racer_extension.c

Direct Known Subclasses

InternalError, ParseError, RuntimeError, ScriptError, ScriptTerminatedError, V8OutOfMemoryError

Class Method Summary

• .load(blob) ⇒ Object

Instance Method Summary

• #attach(name, proc) ⇒ Object
• #call(*args) ⇒ Object
• #dispose ⇒ Object
• #dump ⇒ Object
• #eval(*args) ⇒ Object
• #heap_snapshot ⇒ Object
• #heap_stats ⇒ Object
• #initialize(*args) ⇒ Object constructor
• #low_memory_notification ⇒ Object

  takes ownership of |b|.

• #perform_microtask_checkpoint ⇒ Object
• #pump_message_loop ⇒ Object

  takes ownership of |b|.

• #size ⇒ Object
• #stop ⇒ Object
• #warmup!(arg) ⇒ Object

Constructor Details

#initialize(*args) ⇒ Object

# File 'ext/mini_racer_extension/mini_racer_extension.c', line 1782

static VALUE context_initialize(int argc, VALUE *argv, VALUE self)
{
    VALUE kwargs, a, k, v;
    pthread_attr_t attr;
    const char *cause;
    pthread_t thr;
    Snapshot *ss;
    Context *c;
    char *s;
    int r;

    TypedData_Get_Struct(self, Context, &context_type, c);
    rb_scan_args(argc, argv, ":", &kwargs);
    if (NIL_P(kwargs))
        goto init;
    a = rb_ary_new();
    rb_hash_foreach(kwargs, collect, a);
    while (RARRAY_LENINT(a)) {
        v = rb_ary_pop(a);
        k = rb_ary_pop(a);
        k = rb_sym2str(k);
        s = RSTRING_PTR(k);
        if (!strcmp(s, "ensure_gc_after_idle")) {
            Check_Type(v, T_FIXNUM);
            c->idle_gc = FIX2LONG(v);
            if (c->idle_gc < 0 || c->idle_gc > INT32_MAX)
                rb_raise(rb_eArgError, "bad ensure_gc_after_idle");
        } else if (!strcmp(s, "max_memory")) {
            Check_Type(v, T_FIXNUM);
            c->max_memory = FIX2LONG(v);
            if (c->max_memory < 0 || c->max_memory >= UINT32_MAX)
                rb_raise(rb_eArgError, "bad max_memory");
        } else if (!strcmp(s, "marshal_stack_depth")) { // backcompat, ignored
            Check_Type(v, T_FIXNUM);
        } else if (!strcmp(s, "timeout")) {
            Check_Type(v, T_FIXNUM);
            c->timeout = FIX2LONG(v);
            if (c->timeout < 0 || c->timeout > INT32_MAX)
                rb_raise(rb_eArgError, "bad timeout");
        } else if (!strcmp(s, "snapshot")) {
            if (NIL_P(v))
                continue;
            TypedData_Get_Struct(v, Snapshot, &snapshot_type, ss);
            if (buf_put(&c->snapshot, RSTRING_PTR(ss->blob), RSTRING_LENINT(ss->blob)))
                rb_raise(runtime_error, "out of memory");
        } else if (!strcmp(s, "verbose_exceptions")) {
            c->verbose_exceptions = !(v == Qfalse || v == Qnil);
        } else {
            rb_raise(runtime_error, "bad keyword: %s", s);
        }
    }
init:
    if (single_threaded) {
        v8_once_init();
        c->pst = v8_thread_init(c, c->snapshot.buf, c->snapshot.len, c->max_memory, c->verbose_exceptions);
    } else {
        cause = "pthread_attr_init";
        if ((r = pthread_attr_init(&attr)))
            goto fail;
        pthread_attr_setstacksize(&attr, 2<<20); // 2 MiB
        pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
        // v8 thread takes ownership of |c|
        cause = "pthread_create";
        r = pthread_create(&thr, &attr, v8_thread_start, c);
        pthread_attr_destroy(&attr);
        if (r)
            goto fail;
        barrier_wait(&c->early_init);
        barrier_wait(&c->late_init);
    }
    return Qnil;
fail:
    rb_raise(runtime_error, "Context.initialize: %s: %s", cause, strerror(r));
    return Qnil; // pacify compiler
}

Class Method Details

.load(blob) ⇒ Object

# File 'ext/mini_racer_extension/mini_racer_extension.c', line 1956

static VALUE snapshot_load(VALUE klass, VALUE blob)
{
    Snapshot *ss;
    VALUE self;

    Check_Type(blob, T_STRING);
    self = snapshot_alloc(klass);
    TypedData_Get_Struct(self, Snapshot, &snapshot_type, ss);
    ss->blob = rb_str_dup(blob);
    rb_enc_associate(ss->blob, rb_ascii8bit_encoding());
    ENC_CODERANGE_SET(ss->blob, ENC_CODERANGE_VALID);
    return self;
}

Instance Method Details

#attach(name, proc) ⇒ Object

# File 'ext/mini_racer_extension/mini_racer_extension.c', line 1423

static VALUE context_attach(VALUE self, VALUE name, VALUE proc)
{
    Context *c;
    VALUE e;
    Ser s;
    long id;

    TypedData_Get_Struct(self, Context, &context_type, c);
    id = RARRAY_LEN(c->procs);
    if (id > INT32_MAX)
        rb_raise(runtime_error, "too many callbacks");
    // request is (A)ttach, [name, id] array
    ser_init1(&s, 'A');
    ser_array_begin(&s, 2);
    add_string(&s, name);
    ser_int(&s, id);
    ser_array_end(&s, 2);
    rb_ary_push(c->procs, proc);
    // response is an exception or undefined
    e = rendezvous(c, &s.b);
    handle_exception(e);
    return Qnil;
}

#call(*args) ⇒ Object

# File 'ext/mini_racer_extension/mini_racer_extension.c', line 1518

static VALUE context_call(int argc, VALUE *argv, VALUE self)
{
    VALUE name, args;
    VALUE a, e;
    Context *c;
    Ser s;

    TypedData_Get_Struct(self, Context, &context_type, c);
    rb_scan_args(argc, argv, "1*", &name, &args);
    Check_Type(name, T_STRING);
    rb_ary_unshift(args, name);
    // request is (C)all, [name, args...] array
    ser_init1(&s, 'C');
    if (serialize(&s, args)) {
        ser_reset(&s);
        rb_raise(runtime_error, "Context.call: %s", s.err);
    }
    // response is [result, err] array
    a = rendezvous(c, &s.b); // takes ownership of |s.b|
    e = rb_ary_pop(a);
    handle_exception(e);
    return rb_ary_pop(a);
}

#dispose ⇒ Object

# File 'ext/mini_racer_extension/mini_racer_extension.c', line 1493

static VALUE context_dispose(VALUE self)
{
    Context *c;
    void *r;

    TypedData_Get_Struct(self, Context, &context_type, c);
    r = rb_thread_call_without_gvl(context_dispose_do, c, terminate_ubf, c);
    if (r)
        rb_raise(runtime_error, "context dispose: %s", strerror((int)(intptr_t)r));
    return Qnil;
}

#dump ⇒ Object

# File 'ext/mini_racer_extension/mini_racer_extension.c', line 1948

static VALUE snapshot_dump(VALUE self)
{
    Snapshot *ss;

    TypedData_Get_Struct(self, Snapshot, &snapshot_type, ss);
    return ss->blob;
}

#eval(*args) ⇒ Object

# File 'ext/mini_racer_extension/mini_racer_extension.c', line 1542

static VALUE context_eval(int argc, VALUE *argv, VALUE self)
{
    VALUE a, e, source, filename, kwargs;
    Context *c;
    Ser s;

    TypedData_Get_Struct(self, Context, &context_type, c);
    filename = Qnil;
    rb_scan_args(argc, argv, "1:", &source, &kwargs);
    Check_Type(source, T_STRING);
    if (!NIL_P(kwargs))
        filename = rb_hash_aref(kwargs, rb_id2sym(rb_intern("filename")));
    if (NIL_P(filename))
        filename = rb_str_new_cstr("<eval>");
    Check_Type(filename, T_STRING);
    // request is (E)val, [filename, source] array
    ser_init1(&s, 'E');
    ser_array_begin(&s, 2);
    add_string(&s, filename);
    add_string(&s, source);
    ser_array_end(&s, 2);
    // response is [result, errname] array
    a = rendezvous(c, &s.b); // takes ownership of |s.b|
    e = rb_ary_pop(a);
    handle_exception(e);
    return rb_ary_pop(a);
}

#heap_snapshot ⇒ Object

# File 'ext/mini_racer_extension/mini_racer_extension.c', line 1606

static VALUE context_heap_snapshot(VALUE self)
{
    Buf req, res;
    Context *c;

    TypedData_Get_Struct(self, Context, &context_type, c);
    buf_init(&req);
    buf_putc(&req, 'H');              // (H)eap snapshot, returns plain bytes
    rendezvous_no_des(c, &req, &res); // takes ownership of |req|
    return rb_ensure(heap_snapshot_to_str, (VALUE)&res,
                     buf_reset_ensure, (VALUE)&res);
}

#heap_stats ⇒ Object

# File 'ext/mini_racer_extension/mini_racer_extension.c', line 1570

static VALUE context_heap_stats(VALUE self)
{
    VALUE a, h, k, v;
    Context *c;
    int i, n;
    Buf b;

    TypedData_Get_Struct(self, Context, &context_type, c);
    buf_init(&b);
    buf_putc(&b, 'S');     // (S)tats, returns object
    h = rendezvous(c, &b); // takes ownership of |b|
    a = rb_ary_new();
    rb_hash_foreach(h, collect, a);
    for (i = 0, n = RARRAY_LENINT(a); i < n; i += 2) {
        k = rb_ary_entry(a, i+0);
        v = rb_ary_entry(a, i+1);
        rb_hash_delete(h, k);
        rb_hash_aset(h, rb_str_intern(k), v); // turn "key" into :key
    }
    return h;
}

#low_memory_notification ⇒ Object

takes ownership of |b|

# File 'ext/mini_racer_extension/mini_racer_extension.c', line 1641

static VALUE context_low_memory_notification(VALUE self)
{
    Buf req, res;
    Context *c;

    TypedData_Get_Struct(self, Context, &context_type, c);
    buf_init(&req);
    buf_putc(&req, 'L');              // (L)ow memory notification, returns nothing
    rendezvous_no_des(c, &req, &res); // takes ownership of |req|
    buf_reset(&res);
    return Qnil;
}

#perform_microtask_checkpoint ⇒ Object

# File 'ext/mini_racer_extension/mini_racer_extension.c', line 1619

static VALUE context_perform_microtask_checkpoint(VALUE self)
{
    Context *c;
    Buf b;

    TypedData_Get_Struct(self, Context, &context_type, c);
    buf_init(&b);
    buf_putc(&b, 'M');        // (M)icrotask checkpoint, returns nil
    return rendezvous(c, &b); // takes ownership of |b|
}

#pump_message_loop ⇒ Object

takes ownership of |b|

# File 'ext/mini_racer_extension/mini_racer_extension.c', line 1630

static VALUE context_pump_message_loop(VALUE self)
{
    Context *c;
    Buf b;

    TypedData_Get_Struct(self, Context, &context_type, c);
    buf_init(&b);
    buf_putc(&b, 'P');        // (P)ump, returns bool
    return rendezvous(c, &b); // takes ownership of |b|
}

#size ⇒ Object

# File 'ext/mini_racer_extension/mini_racer_extension.c', line 1970

static VALUE snapshot_size0(VALUE self)
{
    Snapshot *ss;

    TypedData_Get_Struct(self, Snapshot, &snapshot_type, ss);
    return LONG2FIX(RSTRING_LENINT(ss->blob));
}

#stop ⇒ Object

# File 'ext/mini_racer_extension/mini_racer_extension.c', line 1505

static VALUE context_stop(VALUE self)
{
    Context *c;

    // does not grab |mtx| because Context.stop can be called from another
    // thread and then we deadlock if e.g. the V8 thread busy-loops in JS
    TypedData_Get_Struct(self, Context, &context_type, c);
    if (atomic_load(&c->quit))
        rb_raise(context_disposed_error, "disposed context");
    v8_terminate_execution(c->pst);
    return Qnil;
}

#warmup!(arg) ⇒ Object

# File 'ext/mini_racer_extension/mini_racer_extension.c', line 1918

static VALUE snapshot_warmup(VALUE self, VALUE arg)
{
    VALUE a, e, cv;
    Snapshot *ss;
    Context *c;
    DesCtx d;
    Ser s;

    TypedData_Get_Struct(self, Snapshot, &snapshot_type, ss);
    Check_Type(arg, T_STRING);
    cv = context_alloc(context_class);
    context_initialize(0, NULL, cv);
    TypedData_Get_Struct(cv, Context, &context_type, c);
    // request is (W)armup, [snapshot, "warmup code"]
    ser_init1(&s, 'W');
    ser_array_begin(&s, 2);
    ser_string8(&s, (const uint8_t *)RSTRING_PTR(ss->blob), RSTRING_LENINT(ss->blob));
    add_string(&s, arg);
    ser_array_end(&s, 2);
    // response is [arraybuffer, error]
    DesCtx_init(&d);
    d.transcode_latin1 = 0; // don't mangle snapshot binary data
    a = rendezvous1(c, &s.b, &d);
    e = rb_ary_pop(a);
    context_dispose(cv);
    raise_exception_with_message(snapshot_error, e);
    ss->blob = rb_ary_pop(a);
    return self;
}