The following table shows a summary of Memory Analysis Tool (MAT) graphical user interface options (flags) and their corresponding environment variables:
| Environment variable | Where to find in Memory Analysis Tool GUI | What option to set | Additional information |
|---|---|---|---|
| LD_PRELOAD= librcheck.so | Runtime library | The newer library file is librcheck.so; the older file is libmalloc_g.so. A supported option for rcheck library. | |
| MALLOC_ACTION=<number> | When an error is detected: | Set the error action behavior to: 0 to ignore, 1 to abort, 2 to exit, 3 for core, and 4 to stop. A supported option for rcheck library. | |
| MALLOC_BTDEPTH=10 | Limit back-trace depth to: 5 | ||
| MALLOC_CKACCESS=1 | Verify parameters in string and memory functions | Check strings and memory functions for errors. A supported option for rcheck library. | |
| MALLOC_CKBOUNDS=1 | Enable bounds checking (where possible) | Check for out of bounds errors. A supported option for rcheck library. | |
| MALLOC_CKALLOC=1 | Enable check on realloc()/free() argument | Check alloc() and free() functions for errors. A supported option for rcheck library. | |
| MALLOC_CKCHAIN=1 | Perform a full heap integrity check on every allocation/deallocation | Check the allocator chain integrity for every allocation/deallocation. A supported option for rcheck library. | |
| MALLOC_CTHREAD=1 | Create control thread | Start a control thread. A supported option for rcheck library. | |
| MALLOC_DUMP_ LEAKS=1 | Perform leak check when process exits | Enable the dumping of leaks on exit. A supported option for rcheck library. | |
| MALLOC_ERRFILE= /dev/null | N/A | N/A | Error file location. |
| MALLOC_EVENTBTDEPTH=<number> | Limit back-trace depth to: 5 | Set the error traces depth to a specific number. A supported option for rcheck library. | |
| MALLOC_FATAL=0 | When an error is detected: report the error and continue | ||
| MALLOC_FILE=<file> | Target output file or device: | Re-direct output to a file. You can use ${pid} in the filename to replace with process Id and escape $ if running from the shell. A supported option for rcheck library. | |
| MALLOC_HANDLE_SIGNALS=0 | N/A | N/A | When the value is 0, don't install signal handlers. A supported option for the rcheck library. |
| MALLOC_START_TRACING=1 | Enable memory allocation/deallocation tracing | Enable memory tracing (0 to disable). A supported option for rcheck library. | |
| MALLOC_STAT_BINS=<bin1>,<bin2>,... | Bin counters (comma separated) e.g. 8, 16, 32, 1024 | Set custom bins. A supported option for rcheck library. | |
| MALLOC_TRACEBTDEPTH=<number> | Limit back-trace depth to: | Set the allocation traces depth to a specific number. A supported option for rcheck library. | |
| MALLOC_TRACEMAX=<number> | Maximum allocation to trace: | Only trace the allocation for the <= <number> of bytes. A supported option for rcheck library. | |
| MALLOC_TRACEMIN=<number> | Minimum allocation to trace: | Only trace the allocation for the >= <number> of bytes. A supported option for rcheck library. | |
| MALLOC_TRUNCATE=1 | N/A | N/A | Truncate the output files before writing. A supported option for rcheck library. |
| MALLOC_USE_CACHE=<number> | N/A | N/A | Set to 0 to disable optimization. The default is 32. A supported option for rcheck library. |
| MALLOC_VERBOSE=1 | Show debug output on console | When set to 1, it enables the debug output. A supported option for the rcheck library. | |
| MALLOC_WARN=0 | When an error is detected: report the error and continue |