Occurs when two tasks write to a shared memory location, where a parent task overwrites a variable with a new value that was read by a previously executed child task. A child task is a task nested inside another task.

ID |
Code Location |
Description |
|---|---|---|
1 |
Allocation site |
If present, and if the memory involved is heap memory, represents the location and associated call stack when the memory was allocated. |
2 |
Parallel site |
If present, represents the location and associated call stack of the parallel site containing the Memory Reuse, Child Task problem. |
3 |
Read |
Represents the instruction and associated call stack of the first access if it is a memory read. |
4 |
Write |
Represents the instruction and associated call stack of the second access if it is a memory write. |
int global;
void main()
{
ANNOTATE_SITE_BEGIN(reuse_site); // Begin parallel site
ANNOTATE_TASK_BEGIN(task111);
assert(global == 111); // Read
ANNOTATE_TASK_END();
global = 222; // Write
ANNOTATE_SITE_END();
}In this example, a parent task is writing to a shared variable after a task that reads that same variable.
Create a private copy of the variable before executing the child task. Use the private copy in the child task.