Leak in StrType::proxifyString

[philippedistributive]

Issue type

Bug

How did you install PythonMonkey?

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OS platform and distribution

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Python version (python --version)

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PythonMonkey version (pip show pythonmonkey)

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Bug Description

Get sanitizer leak report:

================================================================= ==39075==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 12352 byte(s) in 386 object(s) allocated from: #0 0x7e75e44fc698 in operator new(unsigned long) ../../../../src/libsanitizer/asan/asan_new_delete.cpp:95 #1 0x7e75e01956d1 in StrType::proxifyString(JSContext*, JS::HandleJS::Value) /home/philippe/Sources/PythonMonkey/src/StrType.cc:114 #2 0x7e75e0196348 in StrType::getPyObject(JSContext*, JS::HandleJS::Value) /home/philippe/Sources/PythonMonkey/src/StrType.cc:194 #3 0x7e75e01b1f45 in pyTypeFactory(JSContext*, JS::HandleJS::Value) /home/philippe/Sources/PythonMonkey/src/pyTypeFactory.cc:56 #4 0x7e75e013a456 in getKey /home/philippe/Sources/PythonMonkey/src/JSObjectProxy.cc:124 #5 0x7e75e013af9d in JSObjectProxyMethodDefinitions::JSObjectProxy_get_subscript(JSObjectProxy*, _object*) /home/philippe/Sources/PythonMonkey/src/JSObjectProxy.cc:162 #6 0x7e75e3f45d0c in PyMapping_GetItemString Objects/abstract.c:2353

code sample:

#!/usr/bin/env python3 """ Works at 1020000 elements, OOMs at 1030000 elements... """

import pythonmonkey as pm

oomer = pm.eval(""" function oomer() { let arr_size; // change array size to different values arr_size = 1020000; // success! arr_size = 1030000; // OOMs (ON MY SYSTEM! - maybe you'll have to up it to OOM on yours!)

const bigArray = []; for (let i = 0; i < arr_size; i++) bigArray.push(i + 0.1 / (i + 0.123456)); // randomish floats, fattened up by json.stringify A LOT later

//let seed = 1; bigArray.sort(() => (Math.sin(seed++) * 10000) % 1 - 0.5); // TODO unnecessary, remove later

// these initial values don't really matter per se, it's more just about how they're serialized console.log(Array length: ${bigArray.length}); console.log(Array bytes : ${bigArray.length * 8}); // 8 bytes per js number??? console.log(Array MB : ${bigArray.length * 8 / 1000000});

// The following code is baed off of encodeJobValueList in dcp-client/job/index.js const jsonedElementsArray = []; for (let i = 0; i < bigArray.length; i++) { jsonedElementsArray.push(JSON.stringify(bigArray[i]));

// logging
if (i % 10000 === 0 && i > 600000) // skip first 600000 then only print every 10000 elements
  console.log(i, ' -- ', bigArray[i]);

}

// now we calculate the total length of all the strings in the array and see how much memory they use console.log(JSONed Array length: ${jsonedElementsArray.length}); console.log(JSONed Array bytes : ${jsonedElementsArray.reduce((acc, str) => acc + str.length, 0) * 2}); // 2 bytes per character console.log(JSONed Array MB : ${jsonedElementsArray.reduce((acc, str) => acc + str.length, 0) * 2 / 1000000}); } oomer """)

oomer()

Standalone code to reproduce the issue

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Relevant log output or backtrace

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Additional info if applicable

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What branch of PythonMonkey were you developing on? (If applicable)

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