eiac/xterm.js
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limit parse buffer size

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This commit is contained in:
Jörg Breitbart
2019-10-24 22:32:10 +02:00
parent 527379d343
commit 13ddaf8f98
2 changed files with 42 additions and 5 deletions
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src/InputHandler.ts
+24 -5
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@@ -28,6 +28,11 @@ import { DcsHandler } from 'common/parser/DcsParser';
*/
const GLEVEL: {[key: string]: number} = {'(': 0, ')': 1, '*': 2, '+': 3, '-': 1, '.': 2};
/**
* Max length of the UTF32 input buffer. Real memory consumption is 4 times higher.
*/
const MAX_PARSEBUFFER_LENGTH = 131072;
/**
* DCS subparser implementations
@@ -335,14 +340,28 @@ export class InputHandler extends Disposable implements IInputHandler {
this._logService.debug('parsing data', data);
// resize input buffer if needed
if (this._parseBuffer.length < data.length) {
this._parseBuffer = new Uint32Array(data.length);
if (this._parseBuffer.length < MAX_PARSEBUFFER_LENGTH) {
this._parseBuffer = new Uint32Array(Math.min(data.length, MAX_PARSEBUFFER_LENGTH));
}
}
this._parser.parse(this._parseBuffer,
(typeof data === 'string')
// process big data in smaller chunks
if (data.length > MAX_PARSEBUFFER_LENGTH) {
for (let i = 0; i < data.length; i += MAX_PARSEBUFFER_LENGTH) {
const end = i + MAX_PARSEBUFFER_LENGTH < data.length ? i + MAX_PARSEBUFFER_LENGTH : data.length;
const len = (typeof data === 'string')
? this._stringDecoder.decode(data.substring(i, end), this._parseBuffer)
: this._utf8Decoder.decode(data.subarray(i, end), this._parseBuffer);
this._parser.parse(this._parseBuffer, len);
}
} else {
const len = (typeof data === 'string')
? this._stringDecoder.decode(data, this._parseBuffer)
: this._utf8Decoder.decode(data, this._parseBuffer)
);
: this._utf8Decoder.decode(data, this._parseBuffer);
this._parser.parse(this._parseBuffer, len);
}
buffer = this._bufferService.buffer;
if (buffer.x !== cursorStartX || buffer.y !== cursorStartY) {