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doc/api
- v8.md
lib
- v8.js
src
- node_v8.cc
test/parallel
- test-v8-stats.js

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`‎doc/api/v8.md‎`

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+16-1Lines changed: 16 additions & 1 deletion

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Original file line number	Diff line number	Diff line change
`@@ -180,6 +180,9 @@ Returns an object with the following properties:`
`180`	`180`	* `does_zap_garbage` {number}
`181`	`181`	* `number_of_native_contexts` {number}
`182`	`182`	* `number_of_detached_contexts` {number}
	`183`	+* `total_global_handles_size` {number}
	`184`	+* `used_global_handles_size` {number}
	`185`	+* `external_memory` {number}
`183`	`186`
`184`	`187`	`does_zap_garbage` is a 0/1 boolean, which signifies whether the
`185`	`188`	`--zap_code_space` option is enabled or not. This makes V8 overwrite heap
`@@ -195,6 +198,15 @@ a memory leak.`
`195`	`198`	`of contexts that were detached and not yet garbage collected. This number`
`196`	`199`	`being non-zero indicates a potential memory leak.`
`197`	`200`
	`201`	+`total_global_handles_size` The value of total\_global\_handles\_size is the
	`202`	`+total memory size of V8 global handles.`
	`203`	`+`
	`204`	+`used_global_handles_size` The value of used\_global\_handles\_size is the
	`205`	`+used memory size of V8 global handles.`
	`206`	`+`
	`207`	+`external_memory` The value of external\_memory is the memory size of array
	`208`	`+buffers and external strings.`
	`209`	`+`
`198`	`210`	`<!-- eslint-skip -->`
`199`	`211`
`200`	`212`	```js
`@@ -209,7 +221,10 @@ being non-zero indicates a potential memory leak.`
`209`	`221`	`peak_malloced_memory: 1127496,`
`210`	`222`	`does_zap_garbage: 0,`
`211`	`223`	`number_of_native_contexts: 1,`
`212`		`- number_of_detached_contexts: 0`
	`224`	`+ number_of_detached_contexts: 0,`
	`225`	`+ total_global_handles_size: 8192,`
	`226`	`+ used_global_handles_size: 3296,`
	`227`	`+ external_memory: 318824`
`213`	`228`	`}`
`214`	`229`	```
`215`	`230`

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`‎lib/v8.js‎`

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+7-1Lines changed: 7 additions & 1 deletion

Original file line number	Diff line number	Diff line change
`@@ -107,6 +107,9 @@ const {`
`107`	`107`	`kPeakMallocedMemoryIndex,`
`108`	`108`	`kNumberOfNativeContextsIndex,`
`109`	`109`	`kNumberOfDetachedContextsIndex,`
	`110`	`+ kTotalGlobalHandlesSizeIndex,`
	`111`	`+ kUsedGlobalHandlesSizeIndex,`
	`112`	`+ kExternalMemoryIndex,`
`110`	`113`
`111`	`114`	`// Properties for heap spaces statistics buffer extraction.`
`112`	`115`	`kHeapSpaces,`
`@@ -165,7 +168,10 @@ function getHeapStatistics() {`
`165`	`168`	`peak_malloced_memory: buffer[kPeakMallocedMemoryIndex],`
`166`	`169`	`does_zap_garbage: buffer[kDoesZapGarbageIndex],`
`167`	`170`	`number_of_native_contexts: buffer[kNumberOfNativeContextsIndex],`
`168`		`- number_of_detached_contexts: buffer[kNumberOfDetachedContextsIndex]`
	`171`	`+ number_of_detached_contexts: buffer[kNumberOfDetachedContextsIndex],`
	`172`	`+ total_global_handles_size: buffer[kTotalGlobalHandlesSizeIndex],`
	`173`	`+ used_global_handles_size: buffer[kUsedGlobalHandlesSizeIndex],`
	`174`	`+ external_memory: buffer[kExternalMemoryIndex]`
`169`	`175`	`};`
`170`	`176`	`}`
`171`	`177`

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`‎src/node_v8.cc‎`

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+15-13Lines changed: 15 additions & 13 deletions

Original file line number	Diff line number	Diff line change
`@@ -47,19 +47,21 @@ using v8::Uint32;`
`47`	`47`	`using v8::V8;`
`48`	`48`	`using v8::Value;`
`49`	`49`
`50`		`-`
`51`		`-#define HEAP_STATISTICS_PROPERTIES(V) \`
`52`		`- V(0, total_heap_size, kTotalHeapSizeIndex) \`
`53`		`- V(1, total_heap_size_executable, kTotalHeapSizeExecutableIndex) \`
`54`		`- V(2, total_physical_size, kTotalPhysicalSizeIndex) \`
`55`		`- V(3, total_available_size, kTotalAvailableSize) \`
`56`		`- V(4, used_heap_size, kUsedHeapSizeIndex) \`
`57`		`- V(5, heap_size_limit, kHeapSizeLimitIndex) \`
`58`		`- V(6, malloced_memory, kMallocedMemoryIndex) \`
`59`		`- V(7, peak_malloced_memory, kPeakMallocedMemoryIndex) \`
`60`		`- V(8, does_zap_garbage, kDoesZapGarbageIndex) \`
`61`		`- V(9, number_of_native_contexts, kNumberOfNativeContextsIndex) \`
`62`		`- V(10, number_of_detached_contexts, kNumberOfDetachedContextsIndex)`
	`50`	`+#define HEAP_STATISTICS_PROPERTIES(V) \`
	`51`	`+ V(0, total_heap_size, kTotalHeapSizeIndex) \`
	`52`	`+ V(1, total_heap_size_executable, kTotalHeapSizeExecutableIndex) \`
	`53`	`+ V(2, total_physical_size, kTotalPhysicalSizeIndex) \`
	`54`	`+ V(3, total_available_size, kTotalAvailableSize) \`
	`55`	`+ V(4, used_heap_size, kUsedHeapSizeIndex) \`
	`56`	`+ V(5, heap_size_limit, kHeapSizeLimitIndex) \`
	`57`	`+ V(6, malloced_memory, kMallocedMemoryIndex) \`
	`58`	`+ V(7, peak_malloced_memory, kPeakMallocedMemoryIndex) \`
	`59`	`+ V(8, does_zap_garbage, kDoesZapGarbageIndex) \`
	`60`	`+ V(9, number_of_native_contexts, kNumberOfNativeContextsIndex) \`
	`61`	`+ V(10, number_of_detached_contexts, kNumberOfDetachedContextsIndex) \`
	`62`	`+ V(11, total_global_handles_size, kTotalGlobalHandlesSizeIndex) \`
	`63`	`+ V(12, used_global_handles_size, kUsedGlobalHandlesSizeIndex) \`
	`64`	`+ V(13, external_memory, kExternalMemoryIndex)`
`63`	`65`
`64`	`66`	`#define V(a, b, c) +1`
`65`	`67`	`static constexpr size_t kHeapStatisticsPropertiesCount =`

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`‎test/parallel/test-v8-stats.js‎`

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+3Lines changed: 3 additions & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -6,15 +6,18 @@ const v8 = require('v8');`
`6`	`6`	`const s = v8.getHeapStatistics();`
`7`	`7`	`const keys = [`
`8`	`8`	`'does_zap_garbage',`
	`9`	`+ 'external_memory',`
`9`	`10`	`'heap_size_limit',`
`10`	`11`	`'malloced_memory',`
`11`	`12`	`'number_of_detached_contexts',`
`12`	`13`	`'number_of_native_contexts',`
`13`	`14`	`'peak_malloced_memory',`
`14`	`15`	`'total_available_size',`
	`16`	`+ 'total_global_handles_size',`
`15`	`17`	`'total_heap_size',`
`16`	`18`	`'total_heap_size_executable',`
`17`	`19`	`'total_physical_size',`
	`20`	`+ 'used_global_handles_size',`
`18`	`21`	`'used_heap_size'];`
`19`	`22`	`assert.deepStrictEqual(Object.keys(s).sort(), keys);`
`20`	`23`	`keys.forEach(function(key) {`

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