Debugging Memory-related Issues

Chapel provides several tools and techniques for debugging memory-related issues in your programs. For many problems related to memory leaks or overall memory usage, you can use the built-in memory diagnostics features. Additionally, Chapel supports using external tools like AddressSanitizer (ASan) and Valgrind to help identify and resolve memory issues.

Configuration Constants for Tracking Memory

Chapel supports a number of configuration constants related to dynamic memory allocation for the compiler-generated executable. For full information on these configuration constants consult MemDiagnostics.

A brief synopsis of these configuration constants is as follows:

--memTrack

turn on memory tracking and enable reporting

--memStats

call printMemAllocStats() on normal termination

--memLeaksByType

call printMemAllocsByType() on normal termination

--memLeaks

call printMemAllocs() on normal termination

--memMax=int

set maximum level of allocatable memory

--memThreshold=int

set minimum threshold for memory tracking

--memLog=string

file to contain all memory reporting

--memLeaksLog=string

if set, append final stats and leaks-by-type here

Using Sanitizers

Using AddressSanitizer (ASan) with Chapel can help detect many common memory errors at runtime with minimal overhead. See Sanitizers for details on how to set up and use sanitizers with Chapel.

Using Valgrind

Valgrind is a powerful tool for detecting memory errors at runtime. See Valgrind for details on how to set up and use Valgrind with Chapel.