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Code Issues Packages 1 Wiki Activity

feat(ext/ffi): Make External pointers keep reference to V8 buffer (#17955)

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Aapo Alasuutari 2023-03-05 10:01:23 +02:00 committed by GitHub
parent 0910be4d64
commit da201d9ea5
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GPG key ID: 4AEE18F83AFDEB23
2 changed files with 7 additions and 7 deletions
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8
ext/ffi/00_ffi.js
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@ -26,6 +26,7 @@ const {
SafeMap,
SafeArrayIterator,
SymbolFor,
WeakMap,
} = primordials;
const promiseIdSymbol = SymbolFor("Deno.core.internalPromiseId");
@ -179,6 +180,7 @@ class UnsafePointerView {
const OUT_BUFFER = new Uint32Array(2);
const OUT_BUFFER_64 = new BigInt64Array(OUT_BUFFER.buffer);
const POINTER_TO_BUFFER_WEAK_MAP = new WeakMap();
class UnsafePointer {
static create(value) {
return ops.op_ffi_ptr_create(value);
@ -195,7 +197,11 @@ class UnsafePointer {
if (ObjectPrototypeIsPrototypeOf(UnsafeCallbackPrototype, value)) {
return value.pointer;
}
return ops.op_ffi_ptr_of(value);
const pointer = ops.op_ffi_ptr_of(value);
if (pointer) {
POINTER_TO_BUFFER_WEAK_MAP.set(pointer, value);
}
return pointer;
}
static offset(value, offset) {

6
test_ffi/tests/bench.js
View file

@ -354,8 +354,6 @@ Deno.bench("nop_f64()", () => {
const { nop_buffer } = dylib.symbols;
const buffer = new Uint8Array(8).fill(5);
// Make sure the buffer does not get collected
globalThis.buffer = buffer;
Deno.bench("nop_buffer()", () => {
nop_buffer(buffer);
});
@ -565,8 +563,6 @@ Deno.bench("return_buffer_nonblocking()", async () => {
const { nop_many_parameters } = dylib.symbols;
const buffer2 = new Uint8Array(8).fill(25);
// Make sure the buffer does not get collected
globalThis.buffer2 = buffer2;
Deno.bench("nop_many_parameters()", () => {
nop_many_parameters(
135,
@ -635,8 +631,6 @@ Deno.bench("Deno.UnsafePointer.of", () => {
});
const cstringBuffer = new TextEncoder().encode("Best believe it!\0");
// Make sure the buffer does not get collected
globalThis.cstringBuffer = cstringBuffer;
const cstringPointerView = new Deno.UnsafePointerView(
Deno.UnsafePointer.of(cstringBuffer),
);