6,676 questions
-2
votes
1
answer
123
views
Why is there a heap-after-use error here? I am trying to solve a Leetcode problem in C++. I don't see any dangling pointers or refs to freed memory
I am trying to solve LeetCode 2487: Remove Nodes From Linked List, and I’ve implemented a solution in C++ that first reverses the list, then removes nodes that have a greater value node to their left (...
- 17
0
votes
0
answers
70
views
Why does an in-scope object show as "dead" in Visual Studio when doing a heap snapshot?
I have this sample program:
Program.cs:
internal class Program
{
private static void Main(string[] args)
{
var testObject = new ZZTest();
Console.ReadLine();
Console....
- 323
1
vote
0
answers
79
views
How does Python represent slices in various cases?
Consider
l = [1, 2, 3, 4, 5]
print(l is l[:])
t = (1, 2, 3, 4, 5)
print(t is t[:])
print(t[1:] is t[1:])
print('aa'[1:] is 'aa'[1:])
print('aaa'[1:] is 'aaa'[1:])
The result is, somewhat surprisingly,...
- 1,171
0
votes
0
answers
35
views
Java stream row not getting cleared from heap space
OutOfMemoryError while streaming 20M+ rows in Spring Boot with Hibernate
Issue
I’m streaming 20M+ rows from my Content table using a Stream<Object[]> in Spring Boot with Hibernate. However, I ...
-5
votes
1
answer
64
views
How to release the large object memory which is occupied by xdocument immediately? [duplicate]
XDocument xDoc1 = XDocument.Load(XMLFilepath1, LoadOptions.PreserveWhitespace);
Please suggect any options other GC.Collect() for clearing large objects immediately. We tried below options-
GC....
- 1
0
votes
1
answer
42
views
windbg heap memory mismatch vs total memory of individual addresses
I'm m debugging a .Net process for a possible memory leak.
The command !address -summary shows:
0:000> !address -summary
--- Usage Summary ---------------- RgnCount ----------- Total Size -------- ...
- 1,103
1
vote
3
answers
132
views
Can we use memory address difference to see where an object is initialized? [closed]
I've been reading on user space and kernel space and how heap and stack grow. I'm wondering, if heap and stack memories have constant starts in memory layout, can we just use memory address difference ...
- 1,042
-1
votes
1
answer
24
views
Hypersql (HSQL) startup time and heap memory uses
I am using HSQL with java, HSQL database file size is 3 GB then it need 10 GB heap memory and approx. 5-7 minute database boot time while creating datasource.
Need suggestions to bring down heap ...
- 1
0
votes
0
answers
102
views
Heap Memory Stair-Case rising in SwiftUI project
A simple keyboard extension app showing continuous heap memory allocation each time open the keyboard on screen.
For easier understanding see the image below...
Here is the KeyboardViewController:
...
- 10.2k
0
votes
1
answer
127
views
How is a heap overflow attack implemented?
I am learning about heap overflow attacks, but I am encountering a problem.
Based on the knowledge I found online and my own guesses, I believe that a heap overflow attack involves overwriting ...
- 31
-1
votes
1
answer
46
views
How to reduce heap space utilization when working with a list PDF documents?
I have a microservice that generates multiple PDF Documents and saves to database. For generating each document, from the main service class, I call multiple document specific service class methods by ...
- 500
2
votes
1
answer
132
views
Is arr in stack or heap?
I want to understand if arr here is in stack or heap. Since obj is dynamically allocated is the arr in heap? What if i do not have obj2, if i just allocate obj dynamically in main?
#include <...
- 61
1
vote
1
answer
144
views
Strange garbage collection behaviour leads to server performance degradation
Background to the Application:
We have a Java WebApp on a Tomcat Server for multiple users. We have 30+ customers servers running.
Problem:
On one particular customer we run into a strange phenomenon ...
- 11
3
votes
1
answer
62
views
Observing the default process heap getting created (breakpoint on heap creation)
I want to observe when the default process heap gets created, i.e. have a breakpoint and get the callstack of the creation. This has no practical background. I just want to understand the Windows ...
- 60k
1
vote
0
answers
17
views
Not able to merge free blocks together in my simple, custom, memory allocator
I am trying to implement a simple memory allocator. Essentially trying to copy the function malloc() and free(void *ptr) in C.
I initialize a region of memory using sbrk(). In my custom malloc ...
