ScriptCompiler Class Reference

#include <v8-script.h>

Data Structures
struct	CachedData
struct	CompilationDetails
class	ConsumeCodeCacheTask
class	ExternalSourceStream
class	ScriptStreamingTask
class	Source
class	StreamedSource

Public Types
enum class	InMemoryCacheResult { kNotAttempted , kHit , kMiss , kPartial }
enum	CompileOptions {   kNoCompileOptions = 0 , kConsumeCodeCache , kEagerCompile , kProduceCompileHints ,   kConsumeCompileHints }
enum	NoCacheReason {   kNoCacheNoReason = 0 , kNoCacheBecauseCachingDisabled , kNoCacheBecauseNoResource , kNoCacheBecauseInlineScript ,   kNoCacheBecauseModule , kNoCacheBecauseStreamingSource , kNoCacheBecauseInspector , kNoCacheBecauseScriptTooSmall ,   kNoCacheBecauseCacheTooCold , kNoCacheBecauseV8Extension , kNoCacheBecauseExtensionModule , kNoCacheBecausePacScript ,   kNoCacheBecauseInDocumentWrite , kNoCacheBecauseResourceWithNoCacheHandler , kNoCacheBecauseDeferredProduceCodeCache }

Static Public Member Functions
static V8_WARN_UNUSED_RESULT MaybeLocal< UnboundScript >	CompileUnboundScript (Isolate *isolate, Source *source, CompileOptions options=kNoCompileOptions, NoCacheReason no_cache_reason=kNoCacheNoReason)
static V8_WARN_UNUSED_RESULT MaybeLocal< Script >	Compile (Local< Context > context, Source *source, CompileOptions options=kNoCompileOptions, NoCacheReason no_cache_reason=kNoCacheNoReason)
static ScriptStreamingTask *	StartStreaming (Isolate *isolate, StreamedSource *source, ScriptType type=ScriptType::kClassic, CompileOptions options=kNoCompileOptions, CompileHintCallback compile_hint_callback=nullptr, void *compile_hint_callback_data=nullptr)
static ConsumeCodeCacheTask *	StartConsumingCodeCache (Isolate *isolate, std::unique_ptr< CachedData > source)
static V8_WARN_UNUSED_RESULT MaybeLocal< Script >	Compile (Local< Context > context, StreamedSource *source, Local< String > full_source_string, const ScriptOrigin &origin)
static uint32_t	CachedDataVersionTag ()
static V8_WARN_UNUSED_RESULT MaybeLocal< Module >	CompileModule (Isolate *isolate, Source *source, CompileOptions options=kNoCompileOptions, NoCacheReason no_cache_reason=kNoCacheNoReason)
static V8_WARN_UNUSED_RESULT MaybeLocal< Module >	CompileModule (Local< Context > context, StreamedSource *v8_source, Local< String > full_source_string, const ScriptOrigin &origin)
static V8_WARN_UNUSED_RESULT MaybeLocal< Function >	CompileFunctionInContext (Local< Context > context, Source *source, size_t arguments_count, Local< String > arguments[], size_t context_extension_count, Local< Object > context_extensions[], CompileOptions options=kNoCompileOptions, NoCacheReason no_cache_reason=kNoCacheNoReason, Local< ScriptOrModule > *script_or_module_out=nullptr)
static V8_WARN_UNUSED_RESULT MaybeLocal< Function >	CompileFunction (Local< Context > context, Source *source, size_t arguments_count=0, Local< String > arguments[]=nullptr, size_t context_extension_count=0, Local< Object > context_extensions[]=nullptr, CompileOptions options=kNoCompileOptions, NoCacheReason no_cache_reason=kNoCacheNoReason)
static CachedData *	CreateCodeCache (Local< UnboundScript > unbound_script)
static CachedData *	CreateCodeCache (Local< UnboundModuleScript > unbound_module_script)
static CachedData *	CreateCodeCacheForFunction (Local< Function > function)

Detailed Description

For compiling scripts.

Definition at line 370 of file v8-script.h.

Member Enumeration Documentation

CompileOptions

enum CompileOptions

Enumerator
kNoCompileOptions
kConsumeCodeCache
kEagerCompile
kProduceCompileHints
kConsumeCompileHints

Definition at line 641 of file v8-script.h.

InMemoryCacheResult

enum class InMemoryCacheResult

strong

Enumerator
kNotAttempted
kHit
kMiss
kPartial

Definition at line 430 of file v8-script.h.

NoCacheReason

enum NoCacheReason

The reason for which we are not requesting or providing a code cache.

Enumerator
kNoCacheNoReason
kNoCacheBecauseCachingDisabled
kNoCacheBecauseNoResource
kNoCacheBecauseInlineScript
kNoCacheBecauseModule
kNoCacheBecauseStreamingSource
kNoCacheBecauseInspector
kNoCacheBecauseScriptTooSmall
kNoCacheBecauseCacheTooCold
kNoCacheBecauseV8Extension
kNoCacheBecauseExtensionModule
kNoCacheBecausePacScript
kNoCacheBecauseInDocumentWrite
kNoCacheBecauseResourceWithNoCacheHandler
kNoCacheBecauseDeferredProduceCodeCache

Definition at line 652 of file v8-script.h.

Member Function Documentation

CachedDataVersionTag()

static uint32_t CachedDataVersionTag ( )

static

Return a version tag for CachedData for the current V8 version & flags.

This value is meant only for determining whether a previously generated CachedData instance is still valid; the tag has no other meaing.

Background: The data carried by CachedData may depend on the exact V8 version number or current compiler flags. This means that when persisting CachedData, the embedder must take care to not pass in data from another V8 version, or the same version with different features enabled.

The easiest way to do so is to clear the embedder's cache on any such change.

Alternatively, this tag can be stored alongside the cached data and compared when it is being used.

Compile() [1/2]

static V8_WARN_UNUSED_RESULT MaybeLocal< Script > Compile ( Local< Context >  context, Source *  source, CompileOptions  options = kNoCompileOptions, NoCacheReason  no_cache_reason = kNoCacheNoReason  )

static

Compiles the specified script (bound to current context).

Parameters

source	Script source code.
pre_data	Pre-parsing data, as obtained by ScriptData::PreCompile() using pre_data speeds compilation if it's done multiple times. Owned by caller, no references are kept when this function returns.

Returns

Compiled script object, bound to the context that was active when this function was called. When run it will always use this context.

Compile() [2/2]

static V8_WARN_UNUSED_RESULT MaybeLocal< Script > Compile ( Local< Context >  context, StreamedSource *  source, Local< String >  full_source_string, const ScriptOrigin &  origin  )

static

Compiles a streamed script (bound to current context).

This can only be called after the streaming has finished (ScriptStreamingTask has been run). V8 doesn't construct the source string during streaming, so the embedder needs to pass the full source here.

CompileFunction()

static V8_WARN_UNUSED_RESULT MaybeLocal< Function > CompileFunction ( Local< Context >  context, Source *  source, size_t  arguments_count = 0, Local< String >  arguments[] = nullptr, size_t  context_extension_count = 0, Local< Object >  context_extensions[] = nullptr, CompileOptions  options = kNoCompileOptions, NoCacheReason  no_cache_reason = kNoCacheNoReason  )

static

CompileFunctionInContext()

static V8_WARN_UNUSED_RESULT MaybeLocal< Function > CompileFunctionInContext ( Local< Context >  context, Source *  source, size_t  arguments_count, Local< String >  arguments[], size_t  context_extension_count, Local< Object >  context_extensions[], CompileOptions  options = kNoCompileOptions, NoCacheReason  no_cache_reason = kNoCacheNoReason, Local< ScriptOrModule > *  script_or_module_out = nullptr  )

static

Compile a function for a given context. This is equivalent to running

with (obj) { return function(args) { ... } }

It is possible to specify multiple context extensions (obj in the above example).

CompileModule() [1/2]

static V8_WARN_UNUSED_RESULT MaybeLocal< Module > CompileModule ( Isolate *  isolate, Source *  source, CompileOptions  options = kNoCompileOptions, NoCacheReason  no_cache_reason = kNoCacheNoReason  )

static

Compile an ES module, returning a Module that encapsulates the compiled code.

Corresponds to the ParseModule abstract operation in the ECMAScript specification.

CompileModule() [2/2]

static V8_WARN_UNUSED_RESULT MaybeLocal< Module > CompileModule ( Local< Context >  context, StreamedSource *  v8_source, Local< String >  full_source_string, const ScriptOrigin &  origin  )

static

Compiles a streamed module script.

This can only be called after the streaming has finished (ScriptStreamingTask has been run). V8 doesn't construct the source string during streaming, so the embedder needs to pass the full source here.

CompileUnboundScript()

static V8_WARN_UNUSED_RESULT MaybeLocal< UnboundScript > CompileUnboundScript ( Isolate *  isolate, Source *  source, CompileOptions  options = kNoCompileOptions, NoCacheReason  no_cache_reason = kNoCacheNoReason  )

static

Compiles the specified script (context-independent). Cached data as part of the source object can be optionally produced to be consumed later to speed up compilation of identical source scripts.

Note that when producing cached data, the source must point to NULL for cached data. When consuming cached data, the cached data must have been produced by the same version of V8, and the embedder needs to ensure the cached data is the correct one for the given script.

Parameters

source

Script source code.

Returns

Compiled script object (context independent; for running it must be bound to a context).

CreateCodeCache() [1/2]

static CachedData * CreateCodeCache ( Local< UnboundModuleScript >  unbound_module_script )

static

Creates and returns code cache for the specified unbound_module_script. This will return nullptr if the script cannot be serialized. The CachedData returned by this function should be owned by the caller.

CreateCodeCache() [2/2]

static CachedData * CreateCodeCache ( Local< UnboundScript >  unbound_script )

static

Creates and returns code cache for the specified unbound_script. This will return nullptr if the script cannot be serialized. The CachedData returned by this function should be owned by the caller.

CreateCodeCacheForFunction()

static CachedData * CreateCodeCacheForFunction ( Local< Function >  function )

static

Creates and returns code cache for the specified function that was previously produced by CompileFunction. This will return nullptr if the script cannot be serialized. The CachedData returned by this function should be owned by the caller.

StartConsumingCodeCache()

static ConsumeCodeCacheTask * StartConsumingCodeCache ( Isolate *  isolate, std::unique_ptr< CachedData >  source  )

static

StartStreaming()

static ScriptStreamingTask * StartStreaming ( Isolate *  isolate, StreamedSource *  source, ScriptType  type = ScriptType::kClassic, CompileOptions  options = kNoCompileOptions, CompileHintCallback  compile_hint_callback = nullptr, void *  compile_hint_callback_data = nullptr  )

static

Returns a task which streams script data into V8, or NULL if the script cannot be streamed. The user is responsible for running the task on a background thread and deleting it. When ran, the task starts parsing the script, and it will request data from the StreamedSource as needed. When ScriptStreamingTask::Run exits, all data has been streamed and the script can be compiled (see Compile below).

This API allows to start the streaming with as little data as possible, and the remaining data (for example, the ScriptOrigin) is passed to Compile.

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The documentation for this class was generated from the following file:

• include/v8-script.h