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v8 13.6.233 (node 24.1.0)
V8 is Google's open source JavaScript engine
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v8 13.6.233 (node 24.1.0)
V8 is Google's open source JavaScript engine
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#include <v8-isolate.h>
Data Structures | |
| class | AllowJavascriptExecutionScope |
| struct | CreateParams |
| class | DisallowJavascriptExecutionScope |
| class | Scope |
| class | SuppressMicrotaskExecutionScope |
Static Public Member Functions | |
| static Isolate * | Allocate () |
| static Isolate * | Allocate (const IsolateGroup &group) |
| static void | Initialize (Isolate *isolate, const CreateParams ¶ms) |
| static Isolate * | New (const CreateParams ¶ms) |
| static Isolate * | New (const IsolateGroup &group, const CreateParams ¶ms) |
| static Isolate * | GetCurrent () |
| static Isolate * | TryGetCurrent () |
| static V8_INLINE uint32_t | GetNumberOfDataSlots () |
Static Public Attributes | |
| static constexpr size_t | kMinCodePagesBufferSize = 32 |
Friends | |
| template<class K, class V, class Traits> | |
| class | PersistentValueMapBase |
| class | ExternalMemoryAccounter |
Isolate represents an isolated instance of the V8 engine. V8 isolates have completely separate states. Objects from one isolate must not be used in other isolates. The embedder can create multiple isolates and use them in parallel in multiple threads. An isolate can be entered by at most one thread at any given time. The Locker/Unlocker API must be used to synchronize.
Definition at line 274 of file v8-isolate.h.
| using AbortOnUncaughtExceptionCallback = bool (*)(Isolate*) |
Custom callback used by embedders to help V8 determine if it should abort when it throws and no internal handler is predicted to catch the exception. If –abort-on-uncaught-exception is used on the command line, then V8 will abort if either:
Definition at line 756 of file v8-isolate.h.
| using GCCallback |
Definition at line 1092 of file v8-isolate.h.
| using GCCallbackWithData |
Definition at line 1094 of file v8-isolate.h.
| using GetExternallyAllocatedMemoryInBytesCallback = size_t (*)() |
Definition at line 1190 of file v8-isolate.h.
| using ReleaseCppHeapCallback = void (*)(std::unique_ptr<CppHeap>) |
Definition at line 1175 of file v8-isolate.h.
| using UseCounterCallback |
Definition at line 669 of file v8-isolate.h.
Types of garbage collections that can be requested via RequestGarbageCollectionForTesting.
| Enumerator | |
|---|---|
| kFullGarbageCollection | |
| kMinorGarbageCollection | |
Definition at line 455 of file v8-isolate.h.
| enum MessageErrorLevel |
| Enumerator | |
|---|---|
| kMessageLog | |
| kMessageDebug | |
| kMessageInfo | |
| kMessageError | |
| kMessageWarning | |
| kMessageAll | |
Definition at line 644 of file v8-isolate.h.
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| Enumerator | |
|---|---|
| kBestEffort | |
| kUserVisible | |
| kUserBlocking | |
Definition at line 655 of file v8-isolate.h.
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Time zone redetection indicator for DateTimeConfigurationChangeNotification.
kSkip indicates V8 that the notification should not trigger redetecting host time zone. kRedetect indicates V8 that host time zone should be redetected, and used to set the default time zone.
The host time zone detection may require file system access or similar operations unlikely to be available inside a sandbox. If v8 is run inside a sandbox, the host time zone has to be detected outside the sandbox before calling DateTimeConfigurationChangeNotification function.
| Enumerator | |
|---|---|
| kSkip | |
| kRedetect | |
Definition at line 1745 of file v8-isolate.h.
| enum UseCounterFeature |
Features reported via the SetUseCounterCallback callback. Do not change assigned numbers of existing items; add new features to the end of this list. Dead features can be marked V8_DEPRECATE_SOON, then V8_DEPRECATED, and then finally be renamed to kOBSOLETE_... to stop embedders from using them.
Definition at line 468 of file v8-isolate.h.
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Referenced by Allocate(), Allocate(), Isolate::AllowJavascriptExecutionScope::AllowJavascriptExecutionScope(), Isolate::DisallowJavascriptExecutionScope::DisallowJavascriptExecutionScope(), GetCurrent(), Initialize(), Isolate(), New(), New(), Isolate::AllowJavascriptExecutionScope::operator=(), operator=(), Isolate::Scope::operator=(), Isolate::Scope::Scope(), Isolate::SuppressMicrotaskExecutionScope::SuppressMicrotaskExecutionScope(), and TryGetCurrent().
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| void AddBeforeCallEnteredCallback | ( | BeforeCallEnteredCallback | callback | ) |
Adds a callback to notify the host application right before a script is about to run. If a script re-enters the runtime during executing, the BeforeCallEnteredCallback is invoked for each re-entrance. Executing scripts inside the callback will re-trigger the callback.
| void AddCallCompletedCallback | ( | CallCompletedCallback | callback | ) |
Adds a callback to notify the host application when a script finished running. If a script re-enters the runtime during executing, the CallCompletedCallback is only invoked when the outer-most script execution ends. Executing scripts inside the callback do not trigger further callbacks.
| void AddGCEpilogueCallback | ( | GCCallback | callback, |
| GCType | gc_type_filter = kGCTypeAll ) |
Enables the host application to receive a notification after a garbage collection.
Enables the host application to receive a notification before a garbage collection.
| callback | The callback to be invoked. The callback is allowed to allocate but invocation is not re-entrant: a callback triggering garbage collection will not be called again. JS execution is prohibited from these callbacks. A single callback may only be registered once. |
| gc_type_filter | A filter in case it should be applied. |
References v8::kGCTypeAll.
| void AddGCEpilogueCallback | ( | GCCallbackWithData | callback, |
| void * | data = nullptr, | ||
| GCType | gc_type_filter = kGCTypeAll ) |
Enables the host application to receive a notification after a garbage collection.
Enables the host application to receive a notification before a garbage collection.
| callback | The callback to be invoked. The callback is allowed to allocate but invocation is not re-entrant: a callback triggering garbage collection will not be called again. JS execution is prohibited from these callbacks. A single callback may only be registered once. |
| gc_type_filter | A filter in case it should be applied. |
| data | Additional data that should be passed to the callback. |
References v8::kGCTypeAll.
| void AddGCPrologueCallback | ( | GCCallback | callback, |
| GCType | gc_type_filter = kGCTypeAll ) |
Enables the host application to receive a notification before a garbage collection.
| callback | The callback to be invoked. The callback is allowed to allocate but invocation is not re-entrant: a callback triggering garbage collection will not be called again. JS execution is prohibited from these callbacks. A single callback may only be registered once. |
| gc_type_filter | A filter in case it should be applied. |
References v8::kGCTypeAll.
| void AddGCPrologueCallback | ( | GCCallbackWithData | callback, |
| void * | data = nullptr, | ||
| GCType | gc_type_filter = kGCTypeAll ) |
Enables the host application to receive a notification before a garbage collection.
| callback | The callback to be invoked. The callback is allowed to allocate but invocation is not re-entrant: a callback triggering garbage collection will not be called again. JS execution is prohibited from these callbacks. A single callback may only be registered once. |
| gc_type_filter | A filter in case it should be applied. |
| data | Additional data that should be passed to the callback. |
References v8::kGCTypeAll.
| bool AddMessageListener | ( | MessageCallback | that, |
| Local< Value > | data = Local< Value >() ) |
Adds a message listener (errors only).
The same message listener can be added more than once and in that case it will be called more than once for each message.
If data is specified, it will be passed to the callback when it is called. Otherwise, the exception object will be passed to the callback instead.
References AddMessageListener().
Referenced by AddMessageListener().
| bool AddMessageListenerWithErrorLevel | ( | MessageCallback | that, |
| int | message_levels, | ||
| Local< Value > | data = Local< Value >() ) |
Adds a message listener.
The same message listener can be added more than once and in that case it will be called more than once for each message.
If data is specified, it will be passed to the callback when it is called. Otherwise, the exception object will be passed to the callback instead.
A listener can listen for particular error levels by providing a mask.
References AddMessageListenerWithErrorLevel().
Referenced by AddMessageListenerWithErrorLevel().
| void AddMicrotasksCompletedCallback | ( | MicrotasksCompletedCallbackWithData | callback, |
| void * | data = nullptr ) |
Adds a callback to notify the host application after microtasks were run on the default MicrotaskQueue. The callback is triggered by explicit RunMicrotasks call or automatic microtasks execution (see SetMicrotaskPolicy).
Callback will trigger even if microtasks were attempted to run, but the microtasks queue was empty and no single microtask was actually executed.
Executing scripts inside the callback will not re-trigger microtasks and the callback.
| void AddNearHeapLimitCallback | ( | NearHeapLimitCallback | callback, |
| void * | data ) |
Add a callback to invoke in case the heap size is close to the heap limit. If multiple callbacks are added, only the most recently added callback is invoked.
References AddNearHeapLimitCallback().
Referenced by AddNearHeapLimitCallback().
| int64_t AdjustAmountOfExternalAllocatedMemory | ( | int64_t | change_in_bytes | ) |
Adjusts the amount of registered external memory.
| change_in_bytes | the change in externally allocated memory that is kept alive by JavaScript objects. |
References AdjustAmountOfExternalAllocatedMemory().
Referenced by AdjustAmountOfExternalAllocatedMemory().
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Allocates a new isolate but does not initialize it. Does not change the currently entered isolate.
Only Isolate::GetData() and Isolate::SetData(), which access the embedder-controlled parts of the isolate, as well as Isolate::GetGroup(), are allowed to be called on the uninitialized isolate. To initialize the isolate, call Isolate::Initialize() or initialize a SnapshotCreator.
When an isolate is no longer used its resources should be freed by calling Dispose(). Using the delete operator is not allowed.
V8::Initialize() must have run prior to this.
References Isolate().
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References Isolate().
| void AutomaticallyRestoreInitialHeapLimit | ( | double | threshold_percent = 0.5 | ) |
If the heap limit was changed by the NearHeapLimitCallback, then the initial heap limit will be restored once the heap size falls below the given threshold percentage of the initial heap limit. The threshold percentage is a number in (0.0, 1.0) range.
References AutomaticallyRestoreInitialHeapLimit().
Referenced by AutomaticallyRestoreInitialHeapLimit().
| void CancelTerminateExecution | ( | ) |
Resume execution capability in the given isolate, whose execution was previously forcefully terminated using TerminateExecution().
When execution is forcefully terminated using TerminateExecution(), the isolate can not resume execution until all JavaScript frames have propagated the uncatchable exception which is generated. This method allows the program embedding the engine to handle the termination event and resume execution capability, even if JavaScript frames remain on the stack.
This method can be used by any thread even if that thread has not acquired the V8 lock with a Locker object.
| void ClearCachesForTesting | ( | ) |
Drop non-essential caches. Should only be called from testing code. The method can potentially block for a long time and does not necessarily trigger GC.
| void ClearKeptObjects | ( | ) |
Clears the set of objects held strongly by the heap. This set of objects are originally built when a WeakRef is created or successfully dereferenced.
This is invoked automatically after microtasks are run. See MicrotasksPolicy for when microtasks are run.
This needs to be manually invoked only if the embedder is manually running microtasks via a custom MicrotaskQueue class's PerformCheckpoint. In that case, it is the embedder's responsibility to make this call at a time which does not interrupt synchronous ECMAScript code execution.
| int ContextDisposedNotification | ( | bool | dependant_context = true | ) |
Optional notification that a context has been disposed. V8 uses these notifications to guide the GC heuristic and cancel FinalizationRegistry cleanup tasks. Returns the number of context disposals - including this one
The optional parameter |dependant_context| specifies whether the disposed context was depending on state from other contexts or not.
References ContextDisposedNotification().
Referenced by ContextDisposedNotification(), and ContextDisposedNotification().
| void ContextDisposedNotification | ( | ContextDependants | dependants | ) |
Optional notification that a context has been disposed. V8 uses these notifications to guide heuristics on e.g. GC or compilers.
| dependants | A signal on whether this context possibly had any dependants. |
References ContextDisposedNotification(), and v8::V8_DEPRECATE_SOON().
| size_t CopyCodePages | ( | size_t | capacity, |
| MemoryRange * | code_pages_out ) |
Copies the code heap pages currently in use by V8 into |code_pages_out|. |code_pages_out| must have at least kMinCodePagesBufferSize capacity and must be empty.
Signal-safe, does not allocate, does not access the V8 heap. No code on the stack can rely on pages that might be missing.
Returns the number of pages available to be copied, which might be greater than |capacity|. In this case, only |capacity| pages will be copied into |code_pages_out|. The caller should provide a bigger buffer on the next call in order to get all available code pages, but this is not required.
References CopyCodePages().
Referenced by CopyCodePages().
| void DateTimeConfigurationChangeNotification | ( | TimeZoneDetection | time_zone_detection = TimeZoneDetection::kSkip | ) |
Notification that the embedder has changed the time zone, daylight savings time or other date / time configuration parameters. V8 keeps a cache of various values used for date / time computation. This notification will reset those cached values for the current context so that date / time configuration changes would be reflected.
This API should not be called more than needed as it will negatively impact the performance of date operations.
References kSkip.
| void DiscardThreadSpecificMetadata | ( | ) |
Discards all V8 thread-specific data for the Isolate. Should be used if a thread is terminating and it has used an Isolate that will outlive the thread – all thread-specific data for an Isolate is discarded when an Isolate is disposed so this call is pointless if an Isolate is about to be Disposed.
References GetData(), GetNumberOfDataSlots(), SetData(), and V8_INLINE.
| void Dispose | ( | ) |
Disposes the isolate. The isolate must not be entered by any thread to be disposable.
| void DumpAndResetStats | ( | ) |
Dumps activated low-level V8 internal stats. This can be used instead of performing a full isolate disposal.
Enqueues the callback to the default MicrotaskQueue
| void EnqueueMicrotask | ( | MicrotaskCallback | callback, |
| void * | data = nullptr ) |
Enqueues the callback to the default MicrotaskQueue
| void Enter | ( | ) |
Methods below this point require holding a lock (using Locker) in a multi-threaded environment. Sets this isolate as the entered one for the current thread. Saves the previously entered one (if any), so that it can be restored when exiting. Re-entering an isolate is allowed.
| void Exit | ( | ) |
Exits this isolate by restoring the previously entered one in the current thread. The isolate may still stay the same, if it was entered more than once.
Requires: this == Isolate::GetCurrent().
| void Freeze | ( | bool | is_frozen | ) |
| ArrayBuffer::Allocator * GetArrayBufferAllocator | ( | ) |
Returns the ArrayBuffer::Allocator used in this isolate.
References GetArrayBufferAllocator().
Referenced by GetArrayBufferAllocator().
| void GetCodeRange | ( | void ** | start, |
| size_t * | length_in_bytes ) |
Returns a memory range that can potentially contain jitted code. Code for V8's 'builtins' will not be in this range if embedded builtins is enabled.
On Win64, embedders are advised to install function table callbacks for these ranges, as default SEH won't be able to unwind through jitted code. The first page of the code range is reserved for the embedder and is committed, writable, and executable, to be used to store unwind data, as documented in https://docs.microsoft.com/en-us/cpp/build/exception-handling-x64.
Might be empty on other platforms.
https://code.google.com/p/v8/issues/detail?id=3598
References GetCodeRange().
Referenced by GetCodeRange().
Returns the value that was set or restored by SetContinuationPreservedEmbedderData(), if any.
| CppHeap * GetCppHeap | ( | ) | const |
AttachCppHeap().
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Returns the entered isolate for the current thread or NULL in case there is no current isolate.
This method must not be invoked before V8::Initialize() was invoked.
References Isolate().
Returns the context of the currently running JavaScript, or the context on the top of the stack if no JavaScript is running.
References GetCurrentContext().
Referenced by GetCurrentContext().
| MaybeLocal< Data > GetCurrentHostDefinedOptions | ( | ) |
Returns the host defined options set for currently running script or module, if available.
References GetCurrentHostDefinedOptions().
Referenced by GetCurrentHostDefinedOptions().
| void * GetData | ( | uint32_t | slot | ) |
Retrieve embedder-specific data from the isolate. Returns NULL if SetData has never been called for the given |slot|.
Definition at line 1809 of file v8-isolate.h.
References GetData().
Referenced by DiscardThreadSpecificMetadata(), and GetData().
| V8_INLINE MaybeLocal< T > GetDataFromSnapshotOnce | ( | size_t | index | ) |
Return data that was previously attached to the isolate snapshot via SnapshotCreator, and removes the reference to it. Repeated call with the same index returns an empty MaybeLocal.
References V8_INLINE.
Referenced by ExternalMemoryAccounter, and GetDataFromSnapshotOnce().
| MaybeLocal< T > GetDataFromSnapshotOnce | ( | size_t | index | ) |
Definition at line 1820 of file v8-isolate.h.
References GetDataFromSnapshotOnce(), ValueHelper::kEmpty, v8::internal::PerformCastCheck(), and ValueHelper::ReprAsValue().
| std::string GetDefaultLocale | ( | ) |
Returns the default locale in a string if Intl support is enabled. Otherwise returns an empty string.
| void GetEmbeddedCodeRange | ( | const void ** | start, |
| size_t * | length_in_bytes ) |
As GetCodeRange, but for embedded builtins (these live in a distinct memory region from other V8 Code objects).
References GetEmbeddedCodeRange().
Referenced by GetEmbeddedCodeRange().
Returns either the last context entered through V8's C++ API, or the context of the currently running microtask while processing microtasks. If a context is entered while executing a microtask, that context is returned.
References GetEnteredOrMicrotaskContext().
Referenced by GetEnteredOrMicrotaskContext().
| IsolateGroup GetGroup | ( | ) | const |
Return the group for this isolate.
| uint64_t GetHashSeed | ( | ) |
Returns the hash seed for that isolate, for testing purposes.
| bool GetHeapCodeAndMetadataStatistics | ( | HeapCodeStatistics * | object_statistics | ) |
Get statistics about code and its metadata in the heap.
| object_statistics | The HeapCodeStatistics object to fill in statistics of code, bytecode and their metadata. |
| bool GetHeapObjectStatisticsAtLastGC | ( | HeapObjectStatistics * | object_statistics, |
| size_t | type_index ) |
Get statistics about objects in the heap.
| object_statistics | The HeapObjectStatistics object to fill in statistics of objects of given type, which were live in the previous GC. |
| type_index | The index of the type of object to fill details about, which ranges from 0 to NumberOfTrackedHeapObjectTypes() - 1. |
| HeapProfiler * GetHeapProfiler | ( | ) |
Returns heap profiler for this isolate. Will return NULL until the isolate is initialized.
References GetHeapProfiler().
Referenced by GetHeapProfiler().
| bool GetHeapSpaceStatistics | ( | HeapSpaceStatistics * | space_statistics, |
| size_t | index ) |
Get the memory usage of a space in the heap.
| space_statistics | The HeapSpaceStatistics object to fill in statistics. |
| index | The index of the space to get statistics from, which ranges from 0 to NumberOfHeapSpaces() - 1. |
| void GetHeapStatistics | ( | HeapStatistics * | heap_statistics | ) |
Get statistics about the heap memory usage.
Returns the Context that corresponds to the Incumbent realm in HTML spec. https://html.spec.whatwg.org/multipage/webappapis.html#incumbent
References GetIncumbentContext().
Referenced by GetIncumbentContext().
| JSEntryStubs GetJSEntryStubs | ( | ) |
Returns the JSEntryStubs necessary for use with the Unwinder API.
References GetJSEntryStubs().
Referenced by GetJSEntryStubs().
| MicrotasksPolicy GetMicrotasksPolicy | ( | ) | const |
Returns the policy controlling how Microtasks are invoked.
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Returns the maximum number of available embedder data slots. Valid slots are in the range of 0 - GetNumberOfDataSlots() - 1.
Definition at line 1814 of file v8-isolate.h.
References GetNumberOfDataSlots().
Referenced by DiscardThreadSpecificMetadata(), and GetNumberOfDataSlots().
| void GetStackSample | ( | const RegisterState & | state, |
| void ** | frames, | ||
| size_t | frames_limit, | ||
| SampleInfo * | sample_info ) |
Get a call stack sample from the isolate.
| state | Execution state. |
| frames | Caller allocated buffer to store stack frames. |
| frames_limit | Maximum number of frames to capture. The buffer must be large enough to hold the number of frames. |
| sample_info | The sample info is filled up by the function provides number of actual captured stack frames and the current VM state. |
| int GetStackTraceLimit | ( | ) |
Get the stackTraceLimit property of Error.
| bool HasPendingBackgroundTasks | ( | ) |
Returns true if there is ongoing background work within V8 that will eventually post a foreground task, like asynchronous WebAssembly compilation.
| bool HasPendingException | ( | ) |
Returns true if an exception was thrown but not processed yet by an exception handler on JavaScript side or by v8::TryCatch handler.
This is an experimental feature and may still change significantly.
| bool InContext | ( | ) |
Returns true if this isolate has a current context.
References InContext().
Referenced by InContext().
| void IncreaseHeapLimitForDebugging | ( | ) |
Optional notification to tell V8 the current isolate is used for debugging and requires higher heap limit.
References IncreaseHeapLimitForDebugging().
Referenced by IncreaseHeapLimitForDebugging().
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Initialize an Isolate previously allocated by Isolate::Allocate().
References Isolate().
This function can be called by the embedder to signal V8 that the dynamic enabling of features has finished. V8 can now set up dynamically added features.
References InstallConditionalFeatures().
Referenced by InstallConditionalFeatures().
| bool IsCurrent | ( | ) | const |
Return true if this isolate is currently active.
| bool IsDead | ( | ) |
| bool IsExecutionTerminating | ( | ) |
Is V8 terminating JavaScript execution.
Returns true if JavaScript execution is currently terminating because of a call to TerminateExecution. In that case there are still JavaScript frames on the stack and the termination exception is still active.
| bool IsHeapLimitIncreasedForDebugging | ( | ) |
Returns true if the heap limit was increased for debugging and the original heap limit was not restored yet.
References IsHeapLimitIncreasedForDebugging().
Referenced by IsHeapLimitIncreasedForDebugging().
| bool IsInUse | ( | ) |
| void IsolateInBackgroundNotification | ( | ) |
Optional notification that the isolate switched to the background. V8 uses these notifications to guide heuristics.
References IsolateInBackgroundNotification().
Referenced by IsolateInBackgroundNotification().
| void IsolateInForegroundNotification | ( | ) |
Optional notification that the isolate switched to the foreground. V8 uses these notifications to guide heuristics.
References IsolateInForegroundNotification(), and v8::V8_DEPRECATE_SOON().
Referenced by IsolateInForegroundNotification().
| void LocaleConfigurationChangeNotification | ( | ) |
Notification that the embedder has changed the locale. V8 keeps a cache of various values used for locale computation. This notification will reset those cached values for the current context so that locale configuration changes would be reflected.
This API should not be called more than needed as it will negatively impact the performance of locale operations.
| void LowMemoryNotification | ( | ) |
Optional notification that the system is running low on memory. V8 uses these notifications to attempt to free memory.
| bool MeasureMemory | ( | std::unique_ptr< MeasureMemoryDelegate > | delegate, |
| MeasureMemoryExecution | execution = MeasureMemoryExecution::kDefault ) |
This API is experimental and may change significantly.
Enqueues a memory measurement request and invokes the delegate with the results.
| delegate | the delegate that defines which contexts to measure and reports the results. |
| execution | promptness executing the memory measurement. The kEager value is expected to be used only in tests. |
References v8::kDefault.
| void MemoryPressureNotification | ( | MemoryPressureLevel | level | ) |
Optional notification that the system is running low on memory. V8 uses these notifications to guide heuristics. It is allowed to call this function from another thread while the isolate is executing long running JavaScript code.
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Creates a new isolate. Does not change the currently entered isolate.
When an isolate is no longer used its resources should be freed by calling Dispose(). Using the delete operator is not allowed.
V8::Initialize() must have run prior to this.
References Isolate().
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References Isolate().
| size_t NumberOfHeapSpaces | ( | ) |
Returns the number of spaces in the heap.
| size_t NumberOfTrackedHeapObjectTypes | ( | ) |
Returns the number of types of objects tracked in the heap at GC.
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| void PerformMicrotaskCheckpoint | ( | ) |
Runs the default MicrotaskQueue until it gets empty and perform other microtask checkpoint steps, such as calling ClearKeptObjects. Asserts that the MicrotasksPolicy is not kScoped. Any exceptions thrown by microtask callbacks are swallowed.
| void RemoveBeforeCallEnteredCallback | ( | BeforeCallEnteredCallback | callback | ) |
Removes callback that was installed by AddBeforeCallEnteredCallback.
| void RemoveCallCompletedCallback | ( | CallCompletedCallback | callback | ) |
Removes callback that was installed by AddCallCompletedCallback.
| void RemoveGCEpilogueCallback | ( | GCCallback | callback | ) |
This function removes a callback which was added by AddGCEpilogueCallback.
| callback | the callback to remove. |
| void RemoveGCEpilogueCallback | ( | GCCallbackWithData | callback, |
| void * | data = nullptr ) |
This function removes a callback which was added by AddGCEpilogueCallback.
| callback | the callback to remove. |
| data | Additional data that was used to install the callback. |
| void RemoveGCPrologueCallback | ( | GCCallback | callback | ) |
This function removes a callback which was added by AddGCPrologueCallback.
| callback | the callback to remove. |
| void RemoveGCPrologueCallback | ( | GCCallbackWithData | , |
| void * | data = nullptr ) |
| data | Additional data that was used to install the callback. |
| void RemoveMessageListeners | ( | MessageCallback | that | ) |
Remove all message listeners from the specified callback function.
References RemoveMessageListeners().
Referenced by RemoveMessageListeners().
| void RemoveMicrotasksCompletedCallback | ( | MicrotasksCompletedCallbackWithData | callback, |
| void * | data = nullptr ) |
Removes callback that was installed by AddMicrotasksCompletedCallback.
| void RemoveNearHeapLimitCallback | ( | NearHeapLimitCallback | callback, |
| size_t | heap_limit ) |
Remove the given callback and restore the heap limit to the given limit. If the given limit is zero, then it is ignored. If the current heap size is greater than the given limit, then the heap limit is restored to the minimal limit that is possible for the current heap size.
References RemoveNearHeapLimitCallback().
Referenced by RemoveNearHeapLimitCallback().
| void RequestGarbageCollectionForTesting | ( | GarbageCollectionType | type | ) |
Request garbage collection in this Isolate. It is only valid to call this function if –expose_gc was specified.
This should only be used for testing purposes and not to enforce a garbage collection schedule. It has strong negative impact on the garbage collection performance. Use MemoryPressureNotification() instead to influence the garbage collection schedule.
| void RequestGarbageCollectionForTesting | ( | GarbageCollectionType | type, |
| StackState | stack_state ) |
Request garbage collection with a specific embedderstack state in this Isolate. It is only valid to call this function if –expose_gc was specified.
This should only be used for testing purposes and not to enforce a garbage collection schedule. It has strong negative impact on the garbage collection performance. Use MemoryPressureNotification() instead to influence the garbage collection schedule.
| void RequestInterrupt | ( | InterruptCallback | callback, |
| void * | data ) |
Request V8 to interrupt long running JavaScript code and invoke the given |callback| passing the given |data| to it. After |callback| returns control will be returned to the JavaScript code. There may be a number of interrupt requests in flight. Can be called from another thread without acquiring a |Locker|. Registered |callback| must not reenter interrupted Isolate.
| void RestoreOriginalHeapLimit | ( | ) |
Restores the original heap limit after IncreaseHeapLimitForDebugging().
References RestoreOriginalHeapLimit().
Referenced by RestoreOriginalHeapLimit().
| void SetAbortOnUncaughtExceptionCallback | ( | AbortOnUncaughtExceptionCallback | callback | ) |
| void SetAddCrashKeyCallback | ( | AddCrashKeyCallback | ) |
Enables the host application to provide a mechanism for recording a predefined set of data as crash keys to be used in postmortem debugging in case of a crash.
| void SetAddHistogramSampleFunction | ( | AddHistogramSampleCallback | ) |
| void SetAllowAtomicsWait | ( | bool | allow | ) |
Set whether calling Atomics.wait (a function that may block) is allowed in this isolate. This can also be configured via CreateParams::allow_atomics_wait.
References SetAllowAtomicsWait().
Referenced by SetAllowAtomicsWait().
| void SetAllowWasmCodeGenerationCallback | ( | AllowWasmCodeGenerationCallback | callback | ) |
Set the callback to invoke to check if wasm code generation should be allowed.
References SetAllowWasmCodeGenerationCallback().
Referenced by SetAllowWasmCodeGenerationCallback().
| void SetBatterySaverMode | ( | bool | battery_saver_mode_enabled | ) |
| void SetCaptureStackTraceForUncaughtExceptions | ( | bool | capture, |
| int | frame_limit = 10, | ||
| StackTrace::StackTraceOptions | options = StackTrace::kOverview ) |
Tells V8 to capture current stack trace when uncaught exception occurs and report it to the message listeners. The option is off by default.
References SetCaptureStackTraceForUncaughtExceptions().
Referenced by SetCaptureStackTraceForUncaughtExceptions().
Sets a value that will be stored on continuations and reset while the continuation runs.
| void SetCounterFunction | ( | CounterLookupCallback | ) |
Enables the host application to provide a mechanism for recording statistics counters.
| void SetCreateHistogramFunction | ( | CreateHistogramCallback | ) |
Enables the host application to provide a mechanism for recording histograms. The CreateHistogram function returns a histogram which will later be passed to the AddHistogramSample function.
| void SetData | ( | uint32_t | slot, |
| void * | data ) |
Associate embedder-specific data with the isolate. |slot| has to be between 0 and GetNumberOfDataSlots() - 1.
Definition at line 1804 of file v8-isolate.h.
References SetData().
Referenced by DiscardThreadSpecificMetadata(), and SetData().
| void SetEmbedderRootsHandler | ( | EmbedderRootsHandler * | handler | ) |
| void SetEventLogger | ( | LogEventCallback | that | ) |
Set the callback to invoke for logging event.
| void SetExceptionPropagationCallback | ( | ExceptionPropagationCallback | callback | ) |
This is a part of experimental Api and might be changed without further notice. Do not use it.
Set callback to notify about a new exception being thrown.
| void SetFailedAccessCheckCallbackFunction | ( | FailedAccessCheckCallback | ) |
Callback function for reporting failed access checks.
References SetFailedAccessCheckCallbackFunction().
Referenced by SetFailedAccessCheckCallbackFunction().
| void SetFatalErrorHandler | ( | FatalErrorCallback | that | ) |
Set the callback to invoke in case of fatal errors.
References SetFatalErrorHandler().
Referenced by SetFatalErrorHandler().
| void SetGetExternallyAllocatedMemoryInBytesCallback | ( | GetExternallyAllocatedMemoryInBytesCallback | callback | ) |
| void SetHostCreateShadowRealmContextCallback | ( | HostCreateShadowRealmContextCallback | callback | ) |
This specifies the callback called by the upcoming ShadowRealm construction language feature to retrieve host created globals.
| void SetHostImportModuleDynamicallyCallback | ( | HostImportModuleDynamicallyCallback | callback | ) |
This specifies the callback called by the upcoming dynamic import() language feature to load modules.
| void SetHostImportModuleWithPhaseDynamicallyCallback | ( | HostImportModuleWithPhaseDynamicallyCallback | callback | ) |
This specifies the callback called by the upcoming dynamic import() and import.source() language feature to load modules.
This API is experimental and is expected to be changed or removed in the future. The callback is currently only called when for source-phase imports. Evaluation-phase imports use the existing HostImportModuleDynamicallyCallback callback.
| void SetHostInitializeImportMetaObjectCallback | ( | HostInitializeImportMetaObjectCallback | callback | ) |
This specifies the callback called by the upcoming import.meta language feature to retrieve host-defined meta data for a module.
| void SetIdle | ( | bool | is_idle | ) |
| void SetIsJSApiWrapperNativeErrorCallback | ( | IsJSApiWrapperNativeErrorCallback | callback | ) |
Set the callback that checks whether a Error.isError should return true for a JSApiWrapper object, i.e. whether it represents a native JS error. For example, in an HTML embedder, DOMExceptions are considered native errors.
| void SetIsLoading | ( | bool | is_loading | ) |
Optional notification to tell V8 whether the embedder is currently loading resources. If the embedder uses this notification, it should call SetIsLoading(true) when loading starts and SetIsLoading(false) when it ends. It's valid to call SetIsLoading(true) again while loading, which will update the timestamp when V8 considers the load started. Calling SetIsLoading(false) while not loading does nothing. V8 uses these notifications to guide heuristics. This is an unfinished experimental feature. Semantics and implementation may change frequently.
References SetIsLoading().
Referenced by SetIsLoading().
| void SetJitCodeEventHandler | ( | JitCodeEventOptions | options, |
| JitCodeEventHandler | event_handler ) |
Allows the host application to provide the address of a function that is notified each time code is added, moved or removed.
| options | options for the JIT code event handler. |
| event_handler | the JIT code event handler, which will be invoked each time code is added, moved or removed. |
event_handler won't get notified of existent code. event_handler may get notifications of code that overlaps earlier code notifications. This happens when code areas are reused, and the earlier overlapping code areas should therefore be discarded. event_handler and the strings they point to are not guaranteed to live past each call. The event_handler must copy strings and other parameters it needs to keep around. event_handler function must ignore event codes it does not recognize to maintain future compatibility. References SetJitCodeEventHandler().
Referenced by SetJitCodeEventHandler().
| void SetMemorySaverMode | ( | bool | memory_saver_mode_enabled | ) |
| void SetMetricsRecorder | ( | const std::shared_ptr< metrics::Recorder > & | metrics_recorder | ) |
Enables the host application to provide a mechanism for recording event based metrics. In order to use this interface include/v8-metrics.h needs to be included and the recorder needs to be derived from the Recorder base class defined there. This method can only be called once per isolate and must happen during isolate initialization before background threads are spawned.
| void SetMicrotasksPolicy | ( | MicrotasksPolicy | policy | ) |
Controls how Microtasks are invoked. See MicrotasksPolicy for details.
| void SetModifyCodeGenerationFromStringsCallback | ( | ModifyCodeGenerationFromStringsCallback2 | callback | ) |
Set the callback to invoke to check if code generation from strings should be allowed.
References SetModifyCodeGenerationFromStringsCallback().
Referenced by SetModifyCodeGenerationFromStringsCallback().
| void SetOOMErrorHandler | ( | OOMErrorCallback | that | ) |
Set the callback to invoke in case of OOM errors.
References SetOOMErrorHandler().
Referenced by SetOOMErrorHandler().
| void SetPrepareStackTraceCallback | ( | PrepareStackTraceCallback | callback | ) |
This specifies the callback called when the stack property of Error is accessed.
| void SetPriority | ( | Priority | priority | ) |
Optional notification that the isolate changed priority. V8 uses the priority value to guide heuristics.
References SetPriority().
Referenced by SetPriority().
| void SetPromiseHook | ( | PromiseHook | hook | ) |
Set the PromiseHook callback for various promise lifecycle events.
| void SetPromiseRejectCallback | ( | PromiseRejectCallback | callback | ) |
Set callback to notify about promise reject with no handler, or revocation of such a previous notification once the handler is added.
| void SetReleaseCppHeapCallbackForTesting | ( | ReleaseCppHeapCallback | callback | ) |
| void SetSharedArrayBufferConstructorEnabledCallback | ( | SharedArrayBufferConstructorEnabledCallback | callback | ) |
References SetSharedArrayBufferConstructorEnabledCallback().
Referenced by SetSharedArrayBufferConstructorEnabledCallback().
| void SetStackLimit | ( | uintptr_t | stack_limit | ) |
Modifies the stack limit for this Isolate.
| stack_limit | An address beyond which the Vm's stack may not grow. |
References SetStackLimit().
Referenced by SetStackLimit().
| void SetUseCounterCallback | ( | UseCounterCallback | callback | ) |
Sets a callback for counting the number of times a feature of V8 is used.
| void SetWasmAsyncResolvePromiseCallback | ( | WasmAsyncResolvePromiseCallback | callback | ) |
References SetWasmAsyncResolvePromiseCallback().
Referenced by SetWasmAsyncResolvePromiseCallback().
| void SetWasmImportedStringsEnabledCallback | ( | WasmImportedStringsEnabledCallback | callback | ) |
References SetWasmImportedStringsEnabledCallback().
Referenced by SetWasmImportedStringsEnabledCallback().
| void SetWasmInstanceCallback | ( | ExtensionCallback | callback | ) |
References SetWasmInstanceCallback().
Referenced by SetWasmInstanceCallback().
| void SetWasmJSPIEnabledCallback | ( | WasmJSPIEnabledCallback | callback | ) |
References SetWasmJSPIEnabledCallback().
Referenced by SetWasmJSPIEnabledCallback().
| void SetWasmLoadSourceMapCallback | ( | WasmLoadSourceMapCallback | callback | ) |
References SetWasmLoadSourceMapCallback().
Referenced by SetWasmLoadSourceMapCallback().
| void SetWasmModuleCallback | ( | ExtensionCallback | callback | ) |
Embedder over{ride|load} injection points for wasm APIs. The expectation is that the embedder sets them at most once.
References SetWasmModuleCallback().
Referenced by SetWasmModuleCallback().
| void SetWasmStreamingCallback | ( | WasmStreamingCallback | callback | ) |
References SetWasmStreamingCallback().
Referenced by SetWasmStreamingCallback().
| void TerminateExecution | ( | ) |
Schedules a v8::Exception::Error with the given message. See ThrowException for more details. Templatized to provide compile-time errors in case of too long strings (see v8::String::NewFromUtf8Literal).
Definition at line 1071 of file v8-isolate.h.
References String::NewFromUtf8Literal(), and ThrowError().
Referenced by ThrowError().
Schedules an exception to be thrown when returning to JavaScript. When an exception has been scheduled it is illegal to invoke any JavaScript operation; the caller must return immediately and only after the exception has been handled does it become legal to invoke JavaScript operations.
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static |
Returns the entered isolate for the current thread or NULL in case there is no current isolate.
No checks are performed by this method.
References Isolate().
| V8_DEPRECATED | ( | "Will be | removed, |
| use ScriptCompiler::CompileOptions for enabling the " "compile hints magic comments" | ) |
Register callback to control whether compile hints magic comments are enabled.
References V8_DEPRECATED().
Referenced by V8_DEPRECATED().
|
friend |
Definition at line 1796 of file v8-isolate.h.
References ExternalMemoryAccounter, and GetDataFromSnapshotOnce().
Referenced by ExternalMemoryAccounter.
|
friend |
Definition at line 1795 of file v8-isolate.h.
References PersistentValueMapBase.
Referenced by PersistentValueMapBase.
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staticconstexpr |
Definition at line 1569 of file v8-isolate.h.
