All Questions
Tagged with heap-memory c++
1,480 questions
-2
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1
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123
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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
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
2
votes
1
answer
132
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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
3
votes
1
answer
62
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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
2
votes
1
answer
56
views
Which option has precendence if I enable and disable FrontEndHeapDebugOptions at the same time?
The undocumented (I can't find a MSDN reference) FrontEndHeapDebugOptions Registry key has two flags:
Bit 2 (0x04) for disabling the Segment Heap, thus forcing NT Heap
Bit 3 (0x08) for enabling the ...
- 60k
0
votes
0
answers
133
views
Pico flash and heap - how much available and how much is used
I am learning how to program a Raspberry PicoW in C++ and I have two question about flash:
How much of the flash is my programme taking up? With AtMega programming, the compiler would display this ...
- 391
1
vote
1
answer
76
views
Valgrind Invalid read write for all instance variables of the class
I have a class which have certain instance variables. I am getting random crashes when i run my application. Thinking memory corruption, I ran the application under valgrind, and I am able to narrow ...
- 1,346
46
votes
3
answers
6k
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An empty program that does nothing in C++ needs a heap of 204KB but not in C
Consider this empty program:
int main()
{ return 0; }
If I compile it with C++ with g++ main.cpp && strace ./a.out, and analyze the output with strace, I observed that the last lines of the ...
- 12.4k
2
votes
4
answers
220
views
How to make shared pointer from raw pointer and make other shared pointers aware of it?
I have some hierarchy (through composition, not inheritance) of classes: Child and Parent. Child can have multiple parents, also Parent could do the same. I want the Child class lifetime being managed ...
0
votes
1
answer
84
views
What's the flexibility in concrete types mentioned by Bjarne Stroustroup?
In Chapter 5.2 of the 3rd edition of A Tour of C++, Bjarne write this about concrete types. What I don't understand is what the flexibility is.
Is he referring to the use of pointers in concrete ...
- 1,744
2
votes
3
answers
156
views
How does nested vectors look like in memory?
So I'm considering making an global nested std::vector (vector <vector <data>> V) initially empty and later during the program, adding data to this nested vector. I'm concerned of adding ...
0
votes
0
answers
201
views
"Heap corruption detected" error while Allocating memory inside constructor
I am currently implementing skiplist with my own vector implementation and I am getting an heap corruption not detected error
testing skiplist
entered Skiplist constructor
Skiplist: success creating ...
- 23
0
votes
1
answer
56
views
C++ Primer 5th Ed - Stanley Lipmann: Question on shared_ptr.unique() used in conjunction with shared_ptr.reset()
First we have a shared_ptr defined as below:
shared_ptr<int> p(new int(42));
According to the text below:
The reset member is often used together with unique to
control changes to the object ...
- 3,781
0
votes
0
answers
69
views
C++ Large Heap Array Initialisation
I am writing code which demands a large array. I am told that, due to the size of the array, it is best to store this in Heap Memory. I need this array to be unsigned because I am using it to store ...
0
votes
1
answer
65
views
Getting heap storage with proper alignment in C++ for overaligned type
In some use case, you'll need to allocate storage before creating objects inside this storage.
Then in order to create these objects, you may need to use placement new:
T *pobj = new(pstorage);
yet ...
- 3,003