Skip to content
Navigation Menu
{{ message }}
forked from nodejs/node
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathnode_contextify.cc
More file actions
1140 lines (933 loc) · 36.5 KB
/
Copy pathnode_contextify.cc
File metadata and controls
1140 lines (933 loc) · 36.5 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.
#include "node_errors.h"
#include "node_internals.h"
#include "node_watchdog.h"
#include "base_object-inl.h"
#include "node_contextify.h"
#include "node_context_data.h"
#include "node_errors.h"
namespace node {
namespace contextify {
using v8::Array;
using v8::ArrayBuffer;
using v8::Boolean;
using v8::Context;
using v8::EscapableHandleScope;
using v8::External;
using v8::Function;
using v8::FunctionCallbackInfo;
using v8::FunctionTemplate;
using v8::HandleScope;
using v8::IndexedPropertyHandlerConfiguration;
using v8::Integer;
using v8::Isolate;
using v8::Just;
using v8::Local;
using v8::Maybe;
using v8::MaybeLocal;
using v8::Name;
using v8::NamedPropertyHandlerConfiguration;
using v8::Object;
using v8::ObjectTemplate;
using v8::PropertyAttribute;
using v8::PropertyCallbackInfo;
using v8::PropertyDescriptor;
using v8::Script;
using v8::ScriptCompiler;
using v8::ScriptOrigin;
using v8::String;
using v8::Symbol;
using v8::TryCatch;
using v8::Uint32;
using v8::Uint8Array;
using v8::UnboundScript;
using v8::Value;
using v8::WeakCallbackInfo;
using v8::WeakCallbackType;
// The vm module executes code in a sandboxed environment with a different
// global object than the rest of the code. This is achieved by applying
// every call that changes or queries a property on the global `this` in the
// sandboxed code, to the sandbox object.
//
// The implementation uses V8's interceptors for methods like `set`, `get`,
// `delete`, `defineProperty`, and for any query of the property attributes.
// Property handlers with interceptors are set on the object template for
// the sandboxed code. Handlers for both named properties and for indexed
// properties are used. Their functionality is almost identical, the indexed
// interceptors mostly just call the named interceptors.
//
// For every `get` of a global property in the sandboxed context, the
// interceptor callback checks the sandbox object for the property.
// If the property is defined on the sandbox, that result is returned to
// the original call instead of finishing the query on the global object.
//
// For every `set` of a global property, the interceptor callback defines or
// changes the property both on the sandbox and the global proxy.
namespace {
// Convert an int to a V8 Name (String or Symbol).
Local<Name> Uint32ToName(Local<Context> context, uint32_t index) {
return Uint32::New(context->GetIsolate(), index)->ToString(context)
.ToLocalChecked();
}
} // anonymous namespace
ContextifyContext::ContextifyContext(
Environment* env,
Local<Object> sandbox_obj, const ContextOptions& options) : env_(env) {
Local<Context> v8_context = CreateV8Context(env, sandbox_obj, options);
context_.Reset(env->isolate(), v8_context);
// Allocation failure or maximum call stack size reached
if (context_.IsEmpty())
return;
context_.SetWeak(this, WeakCallback, WeakCallbackType::kParameter);
}
// This is an object that just keeps an internal pointer to this
// ContextifyContext. It's passed to the NamedPropertyHandler. If we
// pass the main JavaScript context object we're embedded in, then the
// NamedPropertyHandler will store a reference to it forever and keep it
// from getting gc'd.
Local<Value> ContextifyContext::CreateDataWrapper(Environment* env) {
EscapableHandleScope scope(env->isolate());
Local<Object> wrapper =
env->script_data_constructor_function()
->NewInstance(env->context()).FromMaybe(Local<Object>());
if (wrapper.IsEmpty())
return scope.Escape(Local<Value>::New(env->isolate(), Local<Value>()));
wrapper->SetAlignedPointerInInternalField(0, this);
return scope.Escape(wrapper);
}
Local<Context> ContextifyContext::CreateV8Context(
Environment* env,
Local<Object> sandbox_obj,
const ContextOptions& options) {
EscapableHandleScope scope(env->isolate());
Local<FunctionTemplate> function_template =
FunctionTemplate::New(env->isolate());
function_template->SetClassName(sandbox_obj->GetConstructorName());
Local<ObjectTemplate> object_template =
function_template->InstanceTemplate();
NamedPropertyHandlerConfiguration config(PropertyGetterCallback,
PropertySetterCallback,
PropertyQueryCallback,
PropertyDeleterCallback,
PropertyEnumeratorCallback,
PropertyDefinerCallback,
PropertyDescriptorCallback,
CreateDataWrapper(env));
IndexedPropertyHandlerConfiguration indexed_config(
IndexedPropertyGetterCallback,
IndexedPropertySetterCallback,
IndexedPropertyQueryCallback,
IndexedPropertyDeleterCallback,
PropertyEnumeratorCallback,
IndexedPropertyDefinerCallback,
IndexedPropertyDescriptorCallback,
CreateDataWrapper(env));
object_template->SetHandler(config);
object_template->SetHandler(indexed_config);
Local<Context> ctx = NewContext(env->isolate(), object_template);
if (ctx.IsEmpty()) {
env->ThrowError("Could not instantiate context");
return Local<Context>();
}
ctx->SetSecurityToken(env->context()->GetSecurityToken());
// We need to tie the lifetime of the sandbox object with the lifetime of
// newly created context. We do this by making them hold references to each
// other. The context can directly hold a reference to the sandbox as an
// embedder data field. However, we cannot hold a reference to a v8::Context
// directly in an Object, we instead hold onto the new context's global
// object instead (which then has a reference to the context).
ctx->SetEmbedderData(ContextEmbedderIndex::kSandboxObject, sandbox_obj);
sandbox_obj->SetPrivate(env->context(),
env->contextify_global_private_symbol(),
ctx->Global());
Utf8Value name_val(env->isolate(), options.name);
ctx->AllowCodeGenerationFromStrings(options.allow_code_gen_strings->IsTrue());
ctx->SetEmbedderData(ContextEmbedderIndex::kAllowWasmCodeGeneration,
options.allow_code_gen_wasm);
ContextInfo info(*name_val);
if (!options.origin.IsEmpty()) {
Utf8Value origin_val(env->isolate(), options.origin);
info.origin = *origin_val;
}
env->AssignToContext(ctx, info);
return scope.Escape(ctx);
}
void ContextifyContext::Init(Environment* env, Local<Object> target) {
Local<FunctionTemplate> function_template =
FunctionTemplate::New(env->isolate());
function_template->InstanceTemplate()->SetInternalFieldCount(1);
env->set_script_data_constructor_function(function_template->GetFunction());
env->SetMethod(target, "makeContext", MakeContext);
env->SetMethod(target, "isContext", IsContext);
env->SetMethod(target, "compileFunction", CompileFunction);
}
// makeContext(sandbox, name, origin, strings, wasm);
void ContextifyContext::MakeContext(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
CHECK_EQ(args.Length(), 5);
CHECK(args[0]->IsObject());
Local<Object> sandbox = args[0].As<Object>();
// Don't allow contextifying a sandbox multiple times.
CHECK(
!sandbox->HasPrivate(
env->context(),
env->contextify_context_private_symbol()).FromJust());
ContextOptions options;
CHECK(args[1]->IsString());
options.name = args[1].As<String>();
CHECK(args[2]->IsString() || args[2]->IsUndefined());
if (args[2]->IsString()) {
options.origin = args[2].As<String>();
}
CHECK(args[3]->IsBoolean());
options.allow_code_gen_strings = args[3].As<Boolean>();
CHECK(args[4]->IsBoolean());
options.allow_code_gen_wasm = args[4].As<Boolean>();
TryCatch try_catch(env->isolate());
ContextifyContext* context = new ContextifyContext(env, sandbox, options);
if (try_catch.HasCaught()) {
try_catch.ReThrow();
return;
}
if (context->context().IsEmpty())
return;
sandbox->SetPrivate(
env->context(),
env->contextify_context_private_symbol(),
External::New(env->isolate(), context));
}
void ContextifyContext::IsContext(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
CHECK(args[0]->IsObject());
Local<Object> sandbox = args[0].As<Object>();
Maybe<bool> result =
sandbox->HasPrivate(env->context(),
env->contextify_context_private_symbol());
args.GetReturnValue().Set(result.FromJust());
}
void ContextifyContext::WeakCallback(
const WeakCallbackInfo<ContextifyContext>& data) {
ContextifyContext* context = data.GetParameter();
delete context;
}
// static
ContextifyContext* ContextifyContext::ContextFromContextifiedSandbox(
Environment* env,
const Local<Object>& sandbox) {
MaybeLocal<Value> maybe_value =
sandbox->GetPrivate(env->context(),
env->contextify_context_private_symbol());
Local<Value> context_external_v;
if (maybe_value.ToLocal(&context_external_v) &&
context_external_v->IsExternal()) {
Local<External> context_external = context_external_v.As<External>();
return static_cast<ContextifyContext*>(context_external->Value());
}
return nullptr;
}
// static
template <typename T>
ContextifyContext* ContextifyContext::Get(const PropertyCallbackInfo<T>& args) {
Local<Value> data = args.Data();
return static_cast<ContextifyContext*>(
data.As<Object>()->GetAlignedPointerFromInternalField(0));
}
// static
void ContextifyContext::PropertyGetterCallback(
Local<Name> property,
const PropertyCallbackInfo<Value>& args) {
ContextifyContext* ctx = ContextifyContext::Get(args);
// Still initializing
if (ctx->context_.IsEmpty())
return;
Local<Context> context = ctx->context();
Local<Object> sandbox = ctx->sandbox();
MaybeLocal<Value> maybe_rv =
sandbox->GetRealNamedProperty(context, property);
if (maybe_rv.IsEmpty()) {
maybe_rv =
ctx->global_proxy()->GetRealNamedProperty(context, property);
}
Local<Value> rv;
if (maybe_rv.ToLocal(&rv)) {
if (rv == sandbox)
rv = ctx->global_proxy();
args.GetReturnValue().Set(rv);
}
}
// static
void ContextifyContext::PropertySetterCallback(
Local<Name> property,
Local<Value> value,
const PropertyCallbackInfo<Value>& args) {
ContextifyContext* ctx = ContextifyContext::Get(args);
// Still initializing
if (ctx->context_.IsEmpty())
return;
auto attributes = PropertyAttribute::None;
bool is_declared_on_global_proxy = ctx->global_proxy()
->GetRealNamedPropertyAttributes(ctx->context(), property)
.To(&attributes);
bool read_only =
static_cast<int>(attributes) &
static_cast<int>(PropertyAttribute::ReadOnly);
bool is_declared_on_sandbox = ctx->sandbox()
->GetRealNamedPropertyAttributes(ctx->context(), property)
.To(&attributes);
read_only = read_only ||
(static_cast<int>(attributes) &
static_cast<int>(PropertyAttribute::ReadOnly));
if (read_only)
return;
// true for x = 5
// false for this.x = 5
// false for Object.defineProperty(this, 'foo', ...)
// false for vmResult.x = 5 where vmResult = vm.runInContext();
bool is_contextual_store = ctx->global_proxy() != args.This();
// Indicator to not return before setting (undeclared) function declarations
// on the sandbox in strict mode, i.e. args.ShouldThrowOnError() = true.
// True for 'function f() {}', 'this.f = function() {}',
// 'var f = function()'.
// In effect only for 'function f() {}' because
// var f = function(), is_declared = true
// this.f = function() {}, is_contextual_store = false.
bool is_function = value->IsFunction();
bool is_declared = is_declared_on_global_proxy || is_declared_on_sandbox;
if (!is_declared && args.ShouldThrowOnError() && is_contextual_store &&
!is_function)
return;
if (!is_declared_on_global_proxy && is_declared_on_sandbox &&
args.ShouldThrowOnError() && is_contextual_store && !is_function) {
// The property exists on the sandbox but not on the global
// proxy. Setting it would throw because we are in strict mode.
// Don't attempt to set it by signaling that the call was
// intercepted. Only change the value on the sandbox.
args.GetReturnValue().Set(false);
}
ctx->sandbox()->Set(property, value);
}
// static
void ContextifyContext::PropertyQueryCallback(
Local<Name> property,
const PropertyCallbackInfo<Integer>& args) {
ContextifyContext* ctx = ContextifyContext::Get(args);
// Still initializing
if (ctx->context_.IsEmpty())
return;
Local<Context> context = ctx->context();
Local<Object> sandbox = ctx->sandbox();
PropertyAttribute attributes;
if (sandbox->HasOwnProperty(context, property).FromMaybe(false) &&
sandbox->GetPropertyAttributes(context, property).To(&attributes)) {
args.GetReturnValue().Set(attributes);
}
}
// static
void ContextifyContext::PropertyDescriptorCallback(
Local<Name> property,
const PropertyCallbackInfo<Value>& args) {
ContextifyContext* ctx = ContextifyContext::Get(args);
// Still initializing
if (ctx->context_.IsEmpty())
return;
Local<Context> context = ctx->context();
Local<Object> sandbox = ctx->sandbox();
if (sandbox->HasOwnProperty(context, property).FromMaybe(false)) {
args.GetReturnValue().Set(
sandbox->GetOwnPropertyDescriptor(context, property)
.ToLocalChecked());
}
}
// static
void ContextifyContext::PropertyDefinerCallback(
Local<Name> property,
const PropertyDescriptor& desc,
const PropertyCallbackInfo<Value>& args) {
ContextifyContext* ctx = ContextifyContext::Get(args);
// Still initializing
if (ctx->context_.IsEmpty())
return;
Local<Context> context = ctx->context();
Isolate* isolate = context->GetIsolate();
auto attributes = PropertyAttribute::None;
bool is_declared =
ctx->global_proxy()->GetRealNamedPropertyAttributes(ctx->context(),
property)
.To(&attributes);
bool read_only =
static_cast<int>(attributes) &
static_cast<int>(PropertyAttribute::ReadOnly);
// If the property is set on the global as read_only, don't change it on
// the global or sandbox.
if (is_declared && read_only)
return;
Local<Object> sandbox = ctx->sandbox();
auto define_prop_on_sandbox =
[&] (PropertyDescriptor* desc_for_sandbox) {
if (desc.has_enumerable()) {
desc_for_sandbox->set_enumerable(desc.enumerable());
}
if (desc.has_configurable()) {
desc_for_sandbox->set_configurable(desc.configurable());
}
// Set the property on the sandbox.
sandbox->DefineProperty(context, property, *desc_for_sandbox)
.FromJust();
};
if (desc.has_get() || desc.has_set()) {
PropertyDescriptor desc_for_sandbox(
desc.has_get() ? desc.get() : Undefined(isolate).As<Value>(),
desc.has_set() ? desc.set() : Undefined(isolate).As<Value>());
define_prop_on_sandbox(&desc_for_sandbox);
} else {
Local<Value> value =
desc.has_value() ? desc.value() : Undefined(isolate).As<Value>();
if (desc.has_writable()) {
PropertyDescriptor desc_for_sandbox(value, desc.writable());
define_prop_on_sandbox(&desc_for_sandbox);
} else {
PropertyDescriptor desc_for_sandbox(value);
define_prop_on_sandbox(&desc_for_sandbox);
}
}
}
// static
void ContextifyContext::PropertyDeleterCallback(
Local<Name> property,
const PropertyCallbackInfo<Boolean>& args) {
ContextifyContext* ctx = ContextifyContext::Get(args);
// Still initializing
if (ctx->context_.IsEmpty())
return;
Maybe<bool> success = ctx->sandbox()->Delete(ctx->context(), property);
if (success.FromMaybe(false))
return;
// Delete failed on the sandbox, intercept and do not delete on
// the global object.
args.GetReturnValue().Set(false);
}
// static
void ContextifyContext::PropertyEnumeratorCallback(
const PropertyCallbackInfo<Array>& args) {
ContextifyContext* ctx = ContextifyContext::Get(args);
// Still initializing
if (ctx->context_.IsEmpty())
return;
args.GetReturnValue().Set(ctx->sandbox()->GetPropertyNames());
}
// static
void ContextifyContext::IndexedPropertyGetterCallback(
uint32_t index,
const PropertyCallbackInfo<Value>& args) {
ContextifyContext* ctx = ContextifyContext::Get(args);
// Still initializing
if (ctx->context_.IsEmpty())
return;
ContextifyContext::PropertyGetterCallback(
Uint32ToName(ctx->context(), index), args);
}
void ContextifyContext::IndexedPropertySetterCallback(
uint32_t index,
Local<Value> value,
const PropertyCallbackInfo<Value>& args) {
ContextifyContext* ctx = ContextifyContext::Get(args);
// Still initializing
if (ctx->context_.IsEmpty())
return;
ContextifyContext::PropertySetterCallback(
Uint32ToName(ctx->context(), index), value, args);
}
// static
void ContextifyContext::IndexedPropertyQueryCallback(
uint32_t index,
const PropertyCallbackInfo<Integer>& args) {
ContextifyContext* ctx = ContextifyContext::Get(args);
// Still initializing
if (ctx->context_.IsEmpty())
return;
ContextifyContext::PropertyQueryCallback(
Uint32ToName(ctx->context(), index), args);
}
// static
void ContextifyContext::IndexedPropertyDescriptorCallback(
uint32_t index,
const PropertyCallbackInfo<Value>& args) {
ContextifyContext* ctx = ContextifyContext::Get(args);
// Still initializing
if (ctx->context_.IsEmpty())
return;
ContextifyContext::PropertyDescriptorCallback(
Uint32ToName(ctx->context(), index), args);
}
void ContextifyContext::IndexedPropertyDefinerCallback(
uint32_t index,
const PropertyDescriptor& desc,
const PropertyCallbackInfo<Value>& args) {
ContextifyContext* ctx = ContextifyContext::Get(args);
// Still initializing
if (ctx->context_.IsEmpty())
return;
ContextifyContext::PropertyDefinerCallback(
Uint32ToName(ctx->context(), index), desc, args);
}
// static
void ContextifyContext::IndexedPropertyDeleterCallback(
uint32_t index,
const PropertyCallbackInfo<Boolean>& args) {
ContextifyContext* ctx = ContextifyContext::Get(args);
// Still initializing
if (ctx->context_.IsEmpty())
return;
Maybe<bool> success = ctx->sandbox()->Delete(ctx->context(), index);
if (success.FromMaybe(false))
return;
// Delete failed on the sandbox, intercept and do not delete on
// the global object.
args.GetReturnValue().Set(false);
}
class ContextifyScript : public BaseObject {
private:
Persistent<UnboundScript> script_;
void MemoryInfo(MemoryTracker* tracker) const override {
tracker->TrackThis(this);
}
ADD_MEMORY_INFO_NAME(ContextifyScript)
public:
static void Init(Environment* env, Local<Object> target) {
HandleScope scope(env->isolate());
Local<String> class_name =
FIXED_ONE_BYTE_STRING(env->isolate(), "ContextifyScript");
Local<FunctionTemplate> script_tmpl = env->NewFunctionTemplate(New);
script_tmpl->InstanceTemplate()->SetInternalFieldCount(1);
script_tmpl->SetClassName(class_name);
env->SetProtoMethod(script_tmpl, "createCachedData", CreateCachedData);
env->SetProtoMethod(script_tmpl, "runInContext", RunInContext);
env->SetProtoMethod(script_tmpl, "runInThisContext", RunInThisContext);
target->Set(class_name, script_tmpl->GetFunction());
env->set_script_context_constructor_template(script_tmpl);
}
static void New(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
Isolate* isolate = env->isolate();
Local<Context> context = env->context();
CHECK(args.IsConstructCall());
const int argc = args.Length();
CHECK_GE(argc, 2);
CHECK(args[0]->IsString());
Local<String> code = args[0].As<String>();
CHECK(args[1]->IsString());
Local<String> filename = args[1].As<String>();
Local<Integer> line_offset;
Local<Integer> column_offset;
Local<Uint8Array> cached_data_buf;
bool produce_cached_data = false;
Local<Context> parsing_context = context;
if (argc > 2) {
// new ContextifyScript(code, filename, lineOffset, columnOffset,
// cachedData, produceCachedData, parsingContext)
CHECK_EQ(argc, 7);
CHECK(args[2]->IsNumber());
line_offset = args[2].As<Integer>();
CHECK(args[3]->IsNumber());
column_offset = args[3].As<Integer>();
if (!args[4]->IsUndefined()) {
CHECK(args[4]->IsUint8Array());
cached_data_buf = args[4].As<Uint8Array>();
}
CHECK(args[5]->IsBoolean());
produce_cached_data = args[5]->IsTrue();
if (!args[6]->IsUndefined()) {
CHECK(args[6]->IsObject());
ContextifyContext* sandbox =
ContextifyContext::ContextFromContextifiedSandbox(
env, args[6].As<Object>());
CHECK_NOT_NULL(sandbox);
parsing_context = sandbox->context();
}
} else {
line_offset = Integer::New(isolate, 0);
column_offset = Integer::New(isolate, 0);
}
ContextifyScript* contextify_script =
new ContextifyScript(env, args.This());
if (*TRACE_EVENT_API_GET_CATEGORY_GROUP_ENABLED(
TRACING_CATEGORY_NODE2(vm, script)) != 0) {
Utf8Value fn(isolate, filename);
TRACE_EVENT_NESTABLE_ASYNC_BEGIN1(
TRACING_CATEGORY_NODE2(vm, script),
"ContextifyScript::New",
contextify_script,
"filename", TRACE_STR_COPY(*fn));
}
ScriptCompiler::CachedData* cached_data = nullptr;
if (!cached_data_buf.IsEmpty()) {
ArrayBuffer::Contents contents = cached_data_buf->Buffer()->GetContents();
uint8_t* data = static_cast<uint8_t*>(contents.Data());
cached_data = new ScriptCompiler::CachedData(
data + cached_data_buf->ByteOffset(), cached_data_buf->ByteLength());
}
ScriptOrigin origin(filename, line_offset, column_offset);
ScriptCompiler::Source source(code, origin, cached_data);
ScriptCompiler::CompileOptions compile_options =
ScriptCompiler::kNoCompileOptions;
if (source.GetCachedData() != nullptr)
compile_options = ScriptCompiler::kConsumeCodeCache;
TryCatch try_catch(isolate);
Environment::ShouldNotAbortOnUncaughtScope no_abort_scope(env);
Context::Scope scope(parsing_context);
MaybeLocal<UnboundScript> v8_script = ScriptCompiler::CompileUnboundScript(
isolate,
&source,
compile_options);
if (v8_script.IsEmpty()) {
DecorateErrorStack(env, try_catch);
no_abort_scope.Close();
try_catch.ReThrow();
TRACE_EVENT_NESTABLE_ASYNC_END0(
TRACING_CATEGORY_NODE2(vm, script),
"ContextifyScript::New",
contextify_script);
return;
}
contextify_script->script_.Reset(isolate, v8_script.ToLocalChecked());
if (compile_options == ScriptCompiler::kConsumeCodeCache) {
args.This()->Set(
env->cached_data_rejected_string(),
Boolean::New(isolate, source.GetCachedData()->rejected));
} else if (produce_cached_data) {
const ScriptCompiler::CachedData* cached_data =
ScriptCompiler::CreateCodeCache(v8_script.ToLocalChecked());
bool cached_data_produced = cached_data != nullptr;
if (cached_data_produced) {
MaybeLocal<Object> buf = Buffer::Copy(
env,
reinterpret_cast<const char*>(cached_data->data),
cached_data->length);
args.This()->Set(env->cached_data_string(), buf.ToLocalChecked());
}
args.This()->Set(
env->cached_data_produced_string(),
Boolean::New(isolate, cached_data_produced));
}
TRACE_EVENT_NESTABLE_ASYNC_END0(
TRACING_CATEGORY_NODE2(vm, script),
"ContextifyScript::New",
contextify_script);
}
static bool InstanceOf(Environment* env, const Local<Value>& value) {
return !value.IsEmpty() &&
env->script_context_constructor_template()->HasInstance(value);
}
static void CreateCachedData(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
ContextifyScript* wrapped_script;
ASSIGN_OR_RETURN_UNWRAP(&wrapped_script, args.Holder());
Local<UnboundScript> unbound_script =
PersistentToLocal(env->isolate(), wrapped_script->script_);
std::unique_ptr<ScriptCompiler::CachedData> cached_data(
ScriptCompiler::CreateCodeCache(unbound_script));
if (!cached_data) {
args.GetReturnValue().Set(Buffer::New(env, 0).ToLocalChecked());
} else {
MaybeLocal<Object> buf = Buffer::Copy(
env,
reinterpret_cast<const char*>(cached_data->data),
cached_data->length);
args.GetReturnValue().Set(buf.ToLocalChecked());
}
}
static void RunInThisContext(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
ContextifyScript* wrapped_script;
ASSIGN_OR_RETURN_UNWRAP(&wrapped_script, args.Holder());
TRACE_EVENT_NESTABLE_ASYNC_BEGIN0(
TRACING_CATEGORY_NODE2(vm, script), "RunInThisContext", wrapped_script);
CHECK_EQ(args.Length(), 3);
CHECK(args[0]->IsNumber());
int64_t timeout = args[0]->IntegerValue(env->context()).FromJust();
CHECK(args[1]->IsBoolean());
bool display_errors = args[1]->IsTrue();
CHECK(args[2]->IsBoolean());
bool break_on_sigint = args[2]->IsTrue();
// Do the eval within this context
EvalMachine(env, timeout, display_errors, break_on_sigint, args);
TRACE_EVENT_NESTABLE_ASYNC_END0(
TRACING_CATEGORY_NODE2(vm, script), "RunInThisContext", wrapped_script);
}
static void RunInContext(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
ContextifyScript* wrapped_script;
ASSIGN_OR_RETURN_UNWRAP(&wrapped_script, args.Holder());
CHECK_EQ(args.Length(), 4);
CHECK(args[0]->IsObject());
Local<Object> sandbox = args[0].As<Object>();
// Get the context from the sandbox
ContextifyContext* contextify_context =
ContextifyContext::ContextFromContextifiedSandbox(env, sandbox);
CHECK_NOT_NULL(contextify_context);
if (contextify_context->context().IsEmpty())
return;
TRACE_EVENT_NESTABLE_ASYNC_BEGIN0(
TRACING_CATEGORY_NODE2(vm, script), "RunInContext", wrapped_script);
CHECK(args[1]->IsNumber());
int64_t timeout = args[1]->IntegerValue(env->context()).FromJust();
CHECK(args[2]->IsBoolean());
bool display_errors = args[2]->IsTrue();
CHECK(args[3]->IsBoolean());
bool break_on_sigint = args[3]->IsTrue();
// Do the eval within the context
Context::Scope context_scope(contextify_context->context());
EvalMachine(contextify_context->env(),
timeout,
display_errors,
break_on_sigint,
args);
TRACE_EVENT_NESTABLE_ASYNC_END0(
TRACING_CATEGORY_NODE2(vm, script), "RunInContext", wrapped_script);
}
static void DecorateErrorStack(Environment* env, const TryCatch& try_catch) {
Local<Value> exception = try_catch.Exception();
if (!exception->IsObject())
return;
Local<Object> err_obj = exception.As<Object>();
if (IsExceptionDecorated(env, err_obj))
return;
AppendExceptionLine(env, exception, try_catch.Message(), CONTEXTIFY_ERROR);
Local<Value> stack = err_obj->Get(env->stack_string());
MaybeLocal<Value> maybe_value =
err_obj->GetPrivate(
env->context(),
env->arrow_message_private_symbol());
Local<Value> arrow;
if (!(maybe_value.ToLocal(&arrow) && arrow->IsString())) {
return;
}
if (stack.IsEmpty() || !stack->IsString()) {
return;
}
Local<String> decorated_stack = String::Concat(
env->isolate(),
String::Concat(env->isolate(),
arrow.As<String>(),
FIXED_ONE_BYTE_STRING(env->isolate(), "\n")),
stack.As<String>());
err_obj->Set(env->stack_string(), decorated_stack);
err_obj->SetPrivate(
env->context(),
env->decorated_private_symbol(),
True(env->isolate()));
}
static bool EvalMachine(Environment* env,
const int64_t timeout,
const bool display_errors,
const bool break_on_sigint,
const FunctionCallbackInfo<Value>& args) {
if (!env->can_call_into_js())
return false;
if (!ContextifyScript::InstanceOf(env, args.Holder())) {
env->ThrowTypeError(
"Script methods can only be called on script instances.");
return false;
}
TryCatch try_catch(env->isolate());
ContextifyScript* wrapped_script;
ASSIGN_OR_RETURN_UNWRAP(&wrapped_script, args.Holder(), false);
Local<UnboundScript> unbound_script =
PersistentToLocal(env->isolate(), wrapped_script->script_);
Local<Script> script = unbound_script->BindToCurrentContext();
MaybeLocal<Value> result;
bool timed_out = false;
bool received_signal = false;
if (break_on_sigint && timeout != -1) {
Watchdog wd(env->isolate(), timeout, &timed_out);
SigintWatchdog swd(env->isolate(), &received_signal);
result = script->Run(env->context());
} else if (break_on_sigint) {
SigintWatchdog swd(env->isolate(), &received_signal);
result = script->Run(env->context());
} else if (timeout != -1) {
Watchdog wd(env->isolate(), timeout, &timed_out);
result = script->Run(env->context());
} else {
result = script->Run(env->context());
}
// Convert the termination exception into a regular exception.
if (timed_out || received_signal) {
env->isolate()->CancelTerminateExecution();
// It is possible that execution was terminated by another timeout in
// which this timeout is nested, so check whether one of the watchdogs
// from this invocation is responsible for termination.
if (timed_out) {
node::THROW_ERR_SCRIPT_EXECUTION_TIMEOUT(env, timeout);
} else if (received_signal) {
node::THROW_ERR_SCRIPT_EXECUTION_INTERRUPTED(env);
}
}
if (try_catch.HasCaught()) {
if (!timed_out && !received_signal && display_errors) {
// We should decorate non-termination exceptions
DecorateErrorStack(env, try_catch);
}
// If there was an exception thrown during script execution, re-throw it.
// If one of the above checks threw, re-throw the exception instead of
// letting try_catch catch it.
// If execution has been terminated, but not by one of the watchdogs from
// this invocation, this will re-throw a `null` value.
try_catch.ReThrow();
return false;
}
args.GetReturnValue().Set(result.ToLocalChecked());
return true;
}
ContextifyScript(Environment* env, Local<Object> object)
: BaseObject(env, object) {
MakeWeak();
}
};
void ContextifyContext::CompileFunction(
const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
Isolate* isolate = env->isolate();
Local<Context> context = env->context();
// Argument 1: source code
CHECK(args[0]->IsString());
Local<String> code = args[0].As<String>();
You can’t perform that action at this time.