I've been working on this project on and off for over a year, and
presented it as part of my graduation thesis on memory management in D. I
think I'm done working on it for a while (due to many other projects
begging for attention), and even though there's still things that could be
finished or improved, it's quite useful as it is now.
Diamond is a post-mortem memory debugger and profiler. It is composed of
two parts:
* a module, which should be imported before any other modules in the
project to be debugged
* a memory log analyzer, which allows inspecting generated memory logs
The module logs all memory operations to a file, as well as periodic
memory snapshots (before garbage collects). Some logging options are
configurable.
Diamond aims to facilitate debugging memory leaks (data referenced by
bogus pointers), memory corruption and other problems. It was written for
D1 (both Phobos and Tango), D2 support is untested at best.
Runtime module features:
* logs all memory events, with timestamps and call stacks
* exports C functions, allowing debuggee to log memory maps or snapshots
at any time, as well as log text comments
* has optional memory debugging features, like checking free calls and
stomping on deallocated memory
Log analyzer features:
* uses map files to display symbols in call stacks
* can seek through the log file, allowing to examine the application
state at different points in time
* can display "top allocators" - call stacks that allocated most bytes
* can filter memory events by address range
* can display a visual "memory map" [1] (useful for quickly finding large
areas the GC shouldn't be scanning for pointers)
* can search for references (pointers) to a certain memory range
* can dump a region of memory to screen
Things still to be done:
* documentation
* more type information (by hooking higher-level allocators)
* dumping data segment and thread stacks (currently only the heap is
dumped)
* more runtime library options
Project homepage:
http://dsource.org/projects/diamond/
[1]
http://dump.thecybershadow.net/36ee988fc564aa9ab5529d43662eec81/0000062E.png
--
Best regards,
Vladimir mailto:[email protected]
